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Патент USA US2412549

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Dec. 10, 1946.
2,412,549
E. w. YATES EI'AL
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1943
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Dec. 10, 1946.
E. w. YATES EI'AL
2,412,549
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1943
'7 Sheets-Sheet 2
1:2? 2
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Dec. 10, 1946.
2,412,549
E. w. YATES ETAL
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1943
'7 Sheets-Sheet 3
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INVENTORS.
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BY
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Dec. 10, 1946.
E. w. YATES ETAL
2,412,549
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1943
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2529
7 Sheets-Sheet 4
Dec. 10, 1946.
E. w. YATES ET AL
2,412,549
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1943
7 Sheets-Sheet 5
INVENTORS,
245
fawn/Pal‘! )Zris
BY
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Dec. 10, 1946.
E. w. YATES EI'AL
2,412,549
AUTOMATIC PATTERN CONTROLLED MILLING MACHINE
Filed June 10, 1945
7 Sheets-Sheet 7
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1NVENTOR5
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2,412,549
UNITED STATES PATENT OFFICE
Patented Dec. 10, 1946
2,412,549
AUTOMATIC PATTERN CONTROLLED
MILLING MACHINE
Edward W. Yates and Taft S. Armandro?‘, Cin
cinnati, Ohio, assignors to The Cincinnati Mill
ing Machine 00., Cincinnati, Ohio, a corpora
tion of Ohio
Application June 10, 1943, Serial No. 490,366
15 Claims. (Cl. 90—13.5)
This invention relates to milling machines and
more particularly to automatic pattern controlled
milling machines.
2
Other objects and advantages of the present
invention should be readily apparent by reference
to the following speci?cation, considered in con
junction with the accompanying drawings form
In the formation of irregular surfaces on a
ing a part thereof and it is to \be understood that
work piece by automatic means, it is common
any modi?cations may be made in the exact
practice to utilize a pattern for engagement by a
structural details there shown and described,
tracer, which is usually connected to the tool
within the scope of the appended claims, without
support to govern or control the irregular path
departing from or exceeding the spirit of the in
of movement of the tool.
vention.
10
Some operations of this kind are rather simple
Referring to the drawings in which like refer
in that they are merely an outlining operation,
ence numerals indicate like or similar parts:
requiring two-directional movement, while others
are more complicated, ultimately requiring three
directional movement of the cutting tool in order
to complete the operation.
In many cases it is
necessary to combine the different methods of
operation, such as forming one portion of a sur
Figure 1 is an elevation of a machine tool em
bodying the principles of this invention.
Figure 2 is an end elevation of the machine
shown in Figure 1 as viewed from the right hand
side of that ?gure.
Figure 3 is an enlarged view of the depth con
face by pattern controlling two-directional move
trol tracer bracket including a cross sectional
ment of the tool in one plane, and then changing
view
through the tracer mechanism.
over and pattern controlling two-directional 20
Figure 4 is an enlarged view of the other tracer
movement of the tool in a second plane usually
support including a section through the tracer
at right angles to the first plane. When' the
control valve.
work has a constant cross-sectional shape in a
Figure 5 is a section on the line 5-5 of Fig
given direction it becomes possible to utilize a
ure 2.
Figure 6 is a section on the line 6--6 of Figure 3.
relatively thin two-dimensional plate as a pattern
Figure '7 is a section on the line '|——‘l of Figure 3.
rather than a large three-dimensional block.
Figure 8 is a detailed section on the line 8-8 of
In view of all of these various requirements and
methods of operation it is an object of this inven
Figure '7.
Figure 9 is a detailed view of the pattern sup
tion to provide a pattern controlled milling ma
chine having a cutting tool which is capable of 30 port adjusting mechanism.
Figure 10 is a detail section on the line Ill-40
three-directional relative movement with respect
to a work piece, that is, axially and two directions
of Figure 5.
Figure 11 is a diagrammatic view of the hy
laterally, with improved control means whereby
in a single machine it is easily and readily possible _ draulic control circuit.
Figure 12 is a section on the line l2--l2 of
to selectively pattern control the axial movement
only; pattern control the two lateral movements
Figure 2.
Referring to the drawings and more particu
simultaneously and in variable proportion where
larly to Figures 1 and 2 the reference numeral l0
by a 360° orbit may be obtained; or to control
simultaneously all three directions of movement 40 indicates the bed of the machine upon which a
table H is slidably mounted and adapted to be
of the tool and in an automatic manner.
Another object of this invention is to provide
propelled by a piston I 2 slidably mounted in a
an automatic three-directional pattern controlled
cylinder [3, and connected by a piston rod M
to the table. A column l5 uprises at the rear of
milling machine.
A further object of this invention is to provide 45 the ‘bed to which it is integrally connected. The
a pattern controlled milling machine with two
column has vertical guideways [6 formed thereon
automatic pattern controlled tracers and suitable
upon which slides a vertically movable carrier l1.
selective connections whereby either may be used
This carrier is adapted to be propelled by a piston
individually to automatically control movement
I8 contained in a cylinder IS, the cylinder being
of the tool in respective planes. or intercoupled for 50 integral with the column, and a piston rod 20
simultaneously controlling the movement of the
serves to connect the piston to the slide. On ac
tool in three directions simultaneously.
count of the weight of the slide l1, and the other
An additional object of this invention is to pro
parts attached thereto which are to be described,
vide a dual tracer, pattern controlled milling ma
the slide I1 is counterbalanced by a counter
chine with means for individually adjusting the
weight 2| which is connected to the slide by a
tracers relative to one another and with respect to 55 chain 22 passing over pulleys 2'3 and 24 mounted
the cutting tool for set-up purposes and to pro
in a bracket 25 attached to the top of the column.
vide means for preventing movements dictated by
The slide H has horizontal guideways 26
one tracer from being imparted to the other
formed therein for slidably supporting a spindle
tracer whereby simpli?ed patterns may be used to (i0 carrier 21 for movement toward and from the
produce a three-dimensional surface on the work.
2,412,549
3
table. The spindle carrier is also adapted to be
propelled by a hydraulic motor comprising a
means will be" immobilized, At the same time the
‘servo-screws must be operatively disconnected
cylinder 28 containing a piston 29 which is op
from the actuated slide. This is all accomplished
eratively connected by a piston rod 30 to the
carrier 21. The cylinder 28 is ?xed in the slide $1 automatically by admitting pressure to one chan
I1.
nel which is the channel 84 shown in Figure 11
having one terminus connected to port 85 of the
selector valve 86 which contains the plunger 4|.
This valve has a pressure port 88 which is con
Power feeding and manual adjustment of the
three slides is controlled by individual servo
valves. As shown in Figurell, the piston and
cylinder motor I2, |3 for the table is adapted to 10 nected by the plunger 4|, when it is shifted to
the right of the position shown, to port 85 where
be controlled by a servo-valve indicated generally
by pressure is admitted to channel 84.
by the reference numeral 3| which has a pres
This channel has a ?rst branch line 89 termi
sure port 32, a. pair of exhaust ports 33 and 34,
nating in a pair of cylinders 90 which contain
and a pair of motor ports 35 and 36. The chan
nels 31 and 38 from ports 35 and 36 terminate in 15 plungers for rotating
ports 39 and 40 of a selector valve having a
plunger“,
the power transmission not shown for the ver
When the plunger is in the position shown in
Figure lllthe ports 39 and 40 are connected to
tical servo-screw 64, but which is connected to
ports 42 and 43respectively which have chan 20 the gear 81. A second branch connection 93
serves to connect channel 84 to a pair of cylin
nels 44 and 45 that terminate in opposite ends
ders 94 containing plungers, for rotating a lever
of the cylinder I3. When the servo-valve plunger
95 centrally connected to a shaft 96 for discon
necting the power transmission to the servo
46 is in a central position as shown, the piston
I2 and thereby the table is held stationary. The
is adapted to :be moved by a servo-screw 25
screw 41.
A third branch connection connects this chan
nel to a disengageable nut 98 for disconnecting
the servo-valve plunger 46 from! the table servo
screw 41. Another, branch channel 99 termi
nates in a cylinder I00 having a plunger I 0| for
port 49. a pair of exhaust ports 50 and 5| and a
pair of motor ports 52 and 53. These latter ports 30 camming the nut portions I02 out of engagement
with the screw 64 whereby the vertical slide I1
are connected by channels 54 and 55 to ports 56
The piston and cylinder I8, I9 for the vertical
slide I1 have a servo-valve indicated generally by
the reference numeral 48 which has a‘ pressure
may move independent of the screw.
and 51 of a selector valve having a control
I
For automatic tracer controlled operations the
plunger 58. When this plunger is in the position
vertical slide and the table are operatively con
shown, the ports 56 and 51 are connected to ports
nected ‘for control by a tracer control valve in
59 and 60 from which channels 6| and 62 extend
dicated generally by'the reference numeral I03
to opposite ends of the cylinder I9.
which supports a tracer ?nger I04 and shown
servo-valve plunger 63 is in the position shown
in Figures 2 and 4. The cross slide or spindle
all flow to and from the cylinder I9 is cut oil’ and
the piston I8 is held stationary. The valve 40 carrier 21 is operatively connected to a tracer
control valve I05 which, in turn, is controlled by
plunger 63 may be operated by a servo-screw 64-.
a tracer ?nger I06 as shown in Figure 3. It will
The piston and cylinder motor 29, 28 for the
be noted that the selector valve plungers 58 and
spindle carrier slide 21 has a servo-valve indicated
4| in Figure 11 are operatively connected to a
generally by the reference numeral 65 in which
is a pressure port I56,v a pair of exhaust ports 61
and 68 and a pair of motor ports 69 and 10. These
latter ports are connected by channels 1| and
'
The two plungers 5B and 4| together constitute
a selector valve which selects’between manual op
eration and automatic tracer controlled opera
tion of the. table II and the vertical slide I1.
The plungers are shown in a manual control posi
tion and are held in this position by a spring
pressed latch I09. When this latch is removed
a spring “0 operating on the end of plunger 58
shifts it to the left, as viewed in Figure 11, and
12 to a selector valve indicated generally by the
reference numeral 13 and having a plunger 14
in which is formed grooves 15 and 16 for inter
connecting channels 1| and 12 to channels 11
and 18 which terminate in opposite ends of the
cylinder 28. When the servo-valve plunger 19
is in the central position shown, the piston 29
is held stationary. The valve'plunger 19 may be
actuated by a servo-screw 80.
through crank I01 shifts the plunger 4| to the
right. This results in the following connections
.
The various servo-valve control screws 41, 64 and
being established.
80 may be‘ power actuated ormanually actuated by
a mechanism such as that shown in U. S. Patent No.
2,239,625, issued April
'2
not believed to be necessary. The various hand
wheels for rotating the servo-screws are shown,
. however, in Figures 2 and 11
and in these ?gures
the hand wheel 8| is Operatively connected to the
servo~screw 41, the hand wheel 62 is operatively
connected to the servo-screw 80 and the hand
wheel 83 is operatively connected to the servo~
screw 64.
hNo power
means have
been provided in this ma
f
'
0 in
rotatable crank I01 ?xed on a rotatable shaft I08
for joint operation.
The ports 59 and 60 which control the piston I8
are connected by the annular grooves III and
60 “2 to ports || 3 and “4 which have channels I | 5
65
The valve II9 has a pair of pressure ports I29
and I30 and the valve I28 has a pair of pressure
70 ports |3| and I32 and all of these pressure ports
are connected to a common supply channel I33
which is connected to port I34 of a, feed-rapid
traverse selector valve I35. This valve is supplied
75 by a rapid traverse pump I 36 and a feed pump I31
which have suitable intakes for withdrawing fluid
2,412,549
5
from a reservoir I38 and individual channels I39
and I40 which terminate at ports MI and I42 in
the selector valve. The port I42 is continuously
connected to the port I34 whereby the channel
I33 is always maintained under pressure by the
feed pump.
Each of the reversing valves H9 and I28 have
an exhaust port I43 and I44 respectively which
are connected by channels I45 and I46 to ports
I82 and I83 which are all supplied through a
branch I84 of the supply line I33.
When the tracer ?nger I04 engages a pattern
or other object it causes through the ball and
socket connection I85, shown in Figure 4, an axial
movement of the plunger I12 to the right as
viewed in Figure 4 or upward as viewed in Fig
ure 11 whereby annular groove I86 interconnects
pressure port I8I with port I14. This results in
an immediate flow of ?uid pressure to cylinders
I41 and I48 of a control valve I49. This valve
I11 and I19 whereby the latch levers I53 and I09
has a plunger I50 which is normally urged in one
are
withdrawn, causing plunger I50 to shift down,
direction by a spring I5I to an automatic tracer
and the plungers 58 and M to shift to the left and
control position. It may be moved by a rotatable
to the right respectively ‘by spring “0. This
crank I52 against the resistance of spring I5I to
places the eccentric I58 under automatic control
a manual control position and latched in that po
of the tracer I04.
sition by a spring-pressed latching lever I53 which
The motor ports I65 and I66 now become con
is engageable with a lug I54 projecting from the
nected to ports I81 and I88 and thereby through
crank I52. When the plunger I50 is in the posi
channels to tracer valve ports I14 and I89 re
tion shown the ports I41 and I48 are connected by
grooves in the plunger to exhaust ports I55 and I56 20 spectively. Since the channel I16 is already under
pressure as previously explained and has a branch
respectively.
connection to port I81, fluid pressure will ?ow
The reversing valve plungers H9 and I28 are
through channel I63 to cause rotation of the
held by springs I51 into engagement with an ec
hydraulic motor I62. This is permissible because
centric I58 which is operatively connected to a
the port I89 is connected to the exhaust port I15.
gear I59. The rotary position of the eccentric
The hydraulic motor will continue to rotate until
determines the relative positions of the reversing
the tracer ?nger is held in a balanced position by
valves and thereby the direction of resultant
the pattern with the tracer valve I12 in a central
movement of the cutter. The gear I59 is con
position. This means that the pattern is acting
nected through an intermediate idler I60 to a
pinion I6I integral with a rotatable hydraulic ,' to restrain excessive deflection of the tracer and
that the spring I13 is continuously urging the
motor I62. The hydraulic motor is connected
tracer into engagement with the pattern.
by channels I63 and I64 to ports I65 and I66 re
A balanced condition will bereached in which
spectively of valve I49. When this valve is in
the spool I90 of the tracer valve is centralized
the position shown, these ports are connected by
with respect to the port I15 and a second spool
annular grooves in the valve to reservoir ports
I9I is centralized with respect to a reservoir port
I61 and I68.
I92. When the spool I90 is centralized with re
It should now be evident that the two revers
spect to the port I15 flow either to or from the
ing valves H9 and I28 are hydraulically con-V
motor I62 will be stopped whereby the motor
nected directly to the opposite ends of the table
cylinder, and to the opposite ends of the vertical 40 will stop, and the parts are now conditioned
whereby any shift in movement of the spool I90
cylinder I9 respectively for controlling reversible
will cause connection of the pressure port I8I to
operation of the connected slides. The particular
either the port I14 or port I82 to port I89.
manner in which these valves control or propor
This portion of the tracer valve now acts as a
tion the ?ow to these two cylinders to proportion
reversing valve to control reversible rotation of
the rates of simultaneous movement thereof is ~
motor I62 and a resultant variation in the direc
more particularly described and claimed in the
tion of movement of the table and vertical slide,
co-pending U. S. application Serial No. 409,171,
the other spool I9I, being centralized with re
?led September 2, 1941, now Patent No. 2,332,533,
spect to the port I92, will act as a resistance to
issued October 26, 1943. It is suf?cient to say that
control
the return ?ow from the slide reversing
the eccentric I58 may be rotated manually by the
valves through channels I45 and I46 respectively.
hand wheel I69 shown in Figure 4 to control the
Due to the downward shifting of the plunger
direction of resultant movement of the table and
I50, the ports I41 and I48 will become connected
vertical slide, or in other words, control the path
to ports I93 and I94 and thereby through chan
of movement of the cutting tool I10 shown in
nels I95 and I96 to ports I91 and I98 in the tracer
Figure 2 which is attached to a rotatable spindle .
valve. Attention is invited to the fact that when
I1I mounted in the spindle carrier 21. This
the tracer valve is centralized or in a neutral po
manual rotation may be accomplished with the
sition the ports I91 and I98 are partially open and
valve I50 in the position shown because at that
the spool I9I is smaller in width than the port
time the hydraulic motor I60 is connected to
_I92 whereby a pressure opening exists on either
reservoir and thus o?ers no resistance to the
side of the spool to permit return ?ow from both
movement.
9
of channels I95 and I96 to the reservoir channel
The tracer valve I03 controls automatic rota
I99. It will now be evident that any shift of
tion of eccentric I58 and has a valve plunger I12
the tracer valve and thereby of the spool I9I in
which is normally urged in one direction by a
either direction will restrict the ?ow from both
of channels I95 and I96 to the reservoir line I99.
spring I13 and when the tracer is out of engage
This restriction of flow in channels I95 and I96
ment with the pattern the plunger I12 may be
tends to slow down the rate of operation of the
urged to its lowest position as viewed in Figure
11 which results in a port I14 being connected to
a reservoir port I15. The port I14 has a chan
nel I16 which branches to a ?rst cylinder I11
table and vertical slide during a change in their
direction of movement caused by rotation of the
hydraulic motor I62. It should now be clear that
the tracer ?nger I04 can be connected to auto
containing a piston I18 operable to disengage the
matically control the path of movement of the
latch I53, and to a second cylinder I19 contain
cutting tool in two directions, or in other words,
ing a piston I80 for disengaging the latch I09.
in
any direction in a vertical plane and that by
75
The tracer valve has four pressure ports I80, I8I,
7
2,412,549
shifting the valve plunger I50 and latching it in
the position shown in Figure 11 that'the relative
direction of movement of the cutting tool with
respect to the work may be manually guided or
controlled by the steering wheel I69 and that this
control may be cut out or stopped by the shift
ing of valve plungers 58 and 4I into the position
shown in Figure 11, resulting in the two cylinders
I3 and I9 being reconnected to the servo-valves
for control thereby.
The crank I 52 which operates the control valve
I50 is mounted on a shaft 200 which projects
through the top of the tracer valve housing 20I
" ing from opposite ends of the cylinder 28 are thus
automatically connected to the tracer controlled
valve I05 upon de?ection thereof. The valve 14
thus serves to automatically disconnect the cross
slide cylinder 28 from the servo-control valve 05
and connect it to the tracer control valve when
the tracer I06 is deflected by a pattern or master.
Such de?ection may be effected by rotating the
servo-screw 80 to feed the cross slide in, and as
10
soon as the tracer engages the master and be
comes de?ected sufficiently to shift the tracer
control valve to cause admission of pressure to
port 22I, the change-over is automatically ef
as shown in Figure 4 where it is provided with a
fected.
control knob 202. The crank I01 which is opera 15
In addition, the valve 13 has a pressure port
tively connected to the valve plungers 4I and 58
229 which becomes connected to port 230 via
and mounted on the shaft I08 may be rotated by
groove 23I whereby ?uid pressure is forced
a crank 203 as shown in Figure 1 which is op
through a check valve 23I' into channel 232 and
eratively connected by linkage 204 to a lever 205
shown in Figure2 which is secured to the upper 20 thereby to cylinder 233. This cylinder contains
a piston 234 for disengaging the half nut 235
end of a rotatable rod 206..- This rod is provided
from the servo-screw. This is necessary because
with an operating handle 201 whereby upon rota
slide actuation is now effected directly by the
tion thereof the lever I01 may be rotated. It
piston 29 and since no means are provided for,
will be noted that the latch I09 can only be dis
rotating the servo-screw it is necessary to disen
engaged by hydraulic pressure in the cylinder 25 ease
the nut.
I19 and therefore when the latch is engaged the
Attention
is called at this point to another in
lever I01 cannot be manually rotated. There
terlock which exists between the servo-screw 80
fore, the lever 201 can only be utilized to rotate
and the other tracer controlled valve in that in
the crank I01 in a clockwise direction, but not in
rotating the servo-screw 80 to feed the cross slide
a counterclockwise direction.
'
The in and out movement of the spindle car 39 in, the operator may cause accidentalengage
ment of the tracer ?nger I04 with a master or
rier 21 toward and from the work support, or in
other part of. the work support while setting up
other words, the depth control movement may be
the machine and cause damage or breakage of
automatically controlled by the tracer I06 pre
the parts. To prevent this the tracer valve I 03
viously referred to, and this tracer which is shown 35 is
provided with the pressure port I80 as'previ
ously mentioned and when the plunger I12 is ex
nection indicated generally by the reference nu
cessively shifted in an axial direction the port
in detail in Figure 3 has a ball and socket con
meral 208 with the valve sleeve 209. A spring
I80 is connected by an annular groove 236 in
2I0 acting on the upper end of the sleeve and
operating through the ball and socket connection 40 plunger I12 to a port 231 which is also connected
to channel 232 leading to cylinder 233 in the cross
tends to hold the tracer I06 in a central or un
slide
housing which contains the piston 234.
de?ected position, the tracer being provided with
This piston is adapted to engage the end of a piv
a spherical journal 2I I- by which it is supported
oted nut member 235 and cause disengagement
in the end of the housing I05.‘v
of the nut member from the servo-screw 80,
-Upon lateral de?ection of the tracer the valve 45 thereby
rendering the screw ine?ective to cause
209 will be caused to move axially toward the
further movement of the cross slide, or in other
right as viewed in Figure 3. When the tracer is
words stopping the Cross slide so as to prevent
unde?ected a pressure port H2 in the valve hous
ing and supplied from channel I 33 is connected
by an annular groove 2I3 to channel 2I4 which
terminates in a port 2I5 of valve 14. Another
port 2I6 in the tracer is connected by annular
groove 2 I 1 to a reservoir port 2I8.
The port 2I6 is connected by a channel 2I9
through a direct connection to a port 220 in valve
14, and a branch connection to a port 22I but
this connection is through a. resistance coll 222.
damage to the tracer ?nger.
'
' There has thus been provided a hydraulic con
trol circuit for controlling three-directional rel_
ative movement automatically and simultaneous
ly between a cutting tool and a work support
which utilizes two tracers, one of which controls
reversible operation in two of said directions, and
the other‘of which controls reversible operation
in a third direction and including means where
by- either of said tracers may be rendered inef
The valve plunger 14 is normally maintained
fective simultaneously rendering manual controls
in the position shown by a spring-pressed plunger
eifective; means whereby only one of said tracers
223 and the bore in which this plunger slides 60 may
be rendered ineii'ective so that manual steer
is connected by a~ drilled hole 224 to port 2I5
ing in a givenplane is rendered possible; and
whereby whatever ?uid pressure exists in chan
suitable interlocks between the tracer control
nel 2I4 is communicated to the end of the plunger
223 to assist in holdingv the plunger 14 in the
position shown. When the tracer I06 is de?ected 65 directions either by manual or power-means.
the pressure port 2 I2 is connected by the annular
The structure for supporting these tracers for
groove 2I1 to port 2I6,whereby the ?uid pres
independent operation in guiding the relative
sure will ?ow through the resistance 222 and port
movement between the tool and work and in a
22I to the chamber 225 at the lower end of plung
er 14, thereby urging that plunger upward against 70 manner each independent of the other will now
be explained. It will be noted from Figures 1
vthe resistance of the spring-pressed plunger 223.
and
2 that the spindle carrier 21 is supported for
This movement will be su?icient to connect
two-directional movement, and this spindle car
" port 2| 5 by way of annular groove 226 to chan
nel 18, and port 220 by way of annular groove ' rier has a self-contained transmission including
221 to channel 11. The channels 11 and 18 lead 75 a prime mover 238 which is attached to the rear
of the carrier by a bracket 239 so as to be mov
2,412,049
able therewith for driving the spindle I'll which
holds a cutting tool I18. Opposite the cutting
tool and mounted on the table II is a work sup
porting bracket 240 and on top of that is a pat
tern or master supporting bracket MI. The
bracket 24I rests on the top surface of the brack
10
and connecting shaft indicated generally by the
reference numeral 261 in Figure 5 to an operating
handle 268 mounted on the rear of the housing
262 as shown in Figure 2 and adjacent to the
lever 266.
The saddle 253 carries a knee 269 which is sup
ported in guides 218 and 2H formed on the
et 248, and a central pivot 242, Figure 9, inter
saddle and translation or adjustment is effected
connects the same whereby the bracket may be
by means of a rack bar 218’ which is attached to
angularly adjusted. In addition, the upper
the
saddle, and a pinion 21I’ which intermeshes
10
bracket may be adjusted back and forth by the
with the rack and is attached to the end of a shaft
adjusting screw 242'.
212 which is journaled in the knee and provided
Thus, the face 243 may be adjusted relative to
with an operating handle 213. The knee 269 is
the face 244 of the bracket 248. The screws 243'
provided with guide surfaces 214 and 215, Figure
at either end serve to swivel the upper bracket.
4, for guiding the tracer housing 28I . The tracer
The purpose of this adjustment is that after the
housing 28I contains the tracer control valve I83,
pattern or master is attached or bolted into place
the selector control valve I49, the two reversing
on the face 243 the longitudinal surfaces may be
valves I28 and H9, together with the eccentric
slightly out of line with the direction of travel
I58 and the power driving mechanism therefor
of the table and by this simple adjusting means
.
correction may be easily effected without dis 20 including the hydraulic motor I 62.
The
eccentricity
of
the
eccentric
means
I58
turbing the various clamping means by which the
may be varied or adjusted by the truncated cylin
pattern or master has been secured in place.
drical member 216 which has a shifter collar 211.
In a tracer controlled machine of the charac
As shown in Figure 5 this collar is engaged by an
ter described it is necessary that the tracer par
eccentric pin 218 attached to the end of a shaft
take of the movement imparted to the cutter
219 journaled in the wall of the housing and this
in order that control may be maintained. Since
shaft is provided with a gear segment 288. A
the two tracers I84 and I86 are coupled for con
pinion 28I attached to the end of a shaft 282
trol of a single tool it is necessary that they be
serves to rotate the segment and thereby the pin
responsive to the movements of the spindle car
30 218 to shift the collar 211.
rier and therefore are mounted on the carrier.
The shaft 282 is journaled in a plate 283 and
To this end a tracer bracket, indicated gener
provided with a bevel gear 284 which intermeshes
ally by the reference numeral 245 in Figures 1
with a bevel gear 285 arranged at right angles
and 2, has been provided with a dovetail guide 246
thereto. The bevel gear 285 is attached tothe
formed on the bottom thereof for reciprocation
in the dovetailed guideway 241 formed on the top 35 end of a shaft 286 which is journaled in a housing
281. The housing 281 is bolted to the plate ‘283
of the spindle carrier 21.
and this plate is capable of limited angular ad
Referring to Figure 5 the underside of the dove
justment to change the angle of the depending
tail guide 246 is provided with rack teeth 248
shaft 286 to suit the convenience of the operator.
which are adapted to be engaged by a pinion
249 which is attached to the end of a shaft 258 40
This is accomplished by providing the plate 283
with elongated slots 288 at opposite ends as shown
which is journaled in the carrier 21 and provided
in Figure 10 through which pass clamping bolts
with a hand wheel 25I shown in Figure 2. Rota
289. The shaft 286 extends through pendant arm
tion of this hand wheel serves to adjust the tracer
298 which is secured to the housing 281 and the
bracket toward and from the pattern support
45 projecting end of the shaft 286 provided with an
and also relative to the cutting tool I18.
operating lever 29I. A graduated collar 29Ia is
The tracer bracket is provided with a vertical
?xed with handle 29I and movable therewith rel
guideway 252 on one face upon which is mounted
ative to a ?xed reference mark 29Ib to indicate
a saddle 253 for carrying one of said tracers and
the feed rate setting. This makes a convenient
a saddle 254 for carrying the other tracer.
Means are provided whereby these saddles may 50 arrangement whereby the operator may change
the rate of tracing or relative feeding between
be independently adjusted relative to one an
cutter and work from his position on the ?oor.
other and this means comprises two elevating
The tracer housing 28I may be adjusted on the
screws 255 and 256. These screws are journaled
guideways 214 and 215 by means of a screw 292
for rotation in opposite ends of the bracket and
as shown in Figure 5 the lower end of screw 256 55 which is threaded in a nut 293 depending from
the underside of the housing 28I. The screw is
is provided with a bevel gear 251 and the lower
journaled in opposite ends of the knee and is pro
end of screw 255 is provided with a bevel gear
vided with a square and 294 as shown in Figure 5
258. The screw 256 is threaded in a nut 259 car
for attachment of a. removable wrench.
ried by the saddle 253.
The saddle 254 is supported on the guideways
The screw 256 is adapted to be manually ro 60
252
and operatively connected to the screw 255 by
tated to eifect adjustment of the saddle 253 by
means comprising a bevel gear 268 which is' keyed
to a shaft 26I in a position to mesh with the bevel
a half nut 295 as more particularly shown in
Figure '7. The half nut is formed on the end of
a retractable plug 296 which is slidably mounted
in the saddle 254 as more particularly shown in
gear 251. The shaft 26I extends longitudinally
through the base housing 262, Figure 2, of the 65
Figure 8. The plug is held against rotation by a
bracket 245 where it is provided with another
pin 291 engaging a slot 298 formed longitudinally
bevel gear 263 for engagement with a bevel gear
of the plug. A pin 299 eccentrically mounted on
264 attached to the end of a shaft 265 which is
the end of a shaft 388 engages a slot 38I formed
journaled in the wall of the housing 262 and
in the plug whereby rotation of the shaft will
provided with an operating handle 266. It will
effect disengagement of the half nut 295. The
now be evident that rotation of the handle 266
shaft 388 may be rotated by a handle 382 locked
will effect adjustment of the saddle 253 which
to effect shifting of the nut.
supports the two-directional tracer I84.
To insure against any possibility of the saddle
The bevel gear 258 which operates the screw
255 is similarly connected through bevel gearing 75 dropping when the nut is disengaged a counter
11
9,419,549
balance is provided comprising a counterweight
l 334 shown in Figure 5 which is connected by a
chain 335, passing over a pulley 360, Flgurel, to
the saddle 254 as shown in Figure 6.
The object of providing a disengageable nut on
the saddle is to make it possible to lock the sad
dle against vertical movement with respect to the
' tracer bracket so that a plate template lying in
a horizontal plane may be utilized as a pattern
for the depth control tracer which would be pos
sible where the work is to have a uniform cross
12
which has a second shoulder 323 engaging the end
of a pivot lever 321. The other end of the lever
engages a trip rod 323 which is normally urged
in one direction by a spring 329 interposed be
tween a ?xed part of the support 3 I0 and a collar
330 attached to the rod.
When the rod 322 is pushed upward it rotates
the rocker shaft and thereby the lever 321 and
pushes the trip rod 328 upward against the re
sistance of spring 329 and causes actuation of the
_ limit switch 32 I.
section. This would‘ be produced by reciprocat
Occasion may arise where it may be desirable
ing the table, and at the end of each table stroke
to utilize a plate template with the lower tracer
indexing the cutter laterally, i. e., in a vertical
I04, in which case the tracer could not be re
direction.
15 sponsive to in and out movements of the carrier
By looking the saddle against vertical move
21 as dictated by the upper tracer I00. Means
ment this indexing movement would not be im
have, therefore, been provided for rendering the
parted to the tracer whereby it would remain in
lower tracer support non-responsive to control
alignment with the plane of the template. To
movements of the upper tracer. This means com
this end the saddle 254 is provided with a detach 20 prises an arm 33I which is attached to the top of
able bracket 303, more particularly shown in Fig
the vertical slide I1 as indicated in Figure 1. As
ures 3 and 6, which may be secured to the saddle
254 by a pair of screw threaded members 304
having
knurled
operating knobs
305. The
shown in Figure 4, this arm has a slotted plate 332
attached to the end thereof and the cross slide
269 of the lower tracer support has a gooseneck
bracket is provided with a key 303 which is 25 arm 333 projecting from the rear end thereof
adapted to ?t in a key slot 301 formed'on the
in which is mounted a bar 334 which is of rec
saddle 254. The upper end of the bracket is pro
tangular cross-section and is positioned to extend
vided with a roller 303 which is adapted to ?t in
across the face of the plate 332. The bar 334 sup
a longitudinally extending slot 309 formed on a
ports a clamping member indicated generally by
?xed support 3I0. This ?xed support is secured 30 the reference numeral 335 and this clamping
as by bolts 3 I 2 to the end of a gooseneck arm 3 I3
member comprises front and rear members which
which, as shown in Figure 1, is attached to the
are hinged together by a pin 336.
top of the column I5. By providing the roller
connection it will be obvious that the tracer sup
The clamping bolt 331 is pivotally connected to
the rear member by a pin 333 and is adapted to
swing down between a pair of ears 339 formed
on the front member. A threaded member 340
is threaded on the bolt and is adapted to draw
the front and rear members together in clamp
port will move toward and from the work support
whenever the carrier 21 is moved, but when the
carrier is moved vertically by the slide I1 the
tracer bracket 245 will move up and down rela
tive to the saddle 254.
ing engagement with the bar 334. The clamping
An interlock is provided to insure that the 40 member carries a roller 34I which ?ts in a slot
half-nut 295 is disengaged from the screw 255
342 in the plate 332. It will, therefore, be appar
whenever the bracket 303 is placed in position
ent that when the bar 334 is clamped to the plate
and this includes an interlock pin 3“ which is
332 by the clamping member that the slide 269 is
slidably supported in a bore 3I5 in the saddle 254
held against axial movement but the entire struc
and adapted to project into key slot 301 as shown 45 ture
is still capable of vertical movement. When
in Figure 7 whereby when the bracket is placed
thisl
is
done, handle 213 is pulled out to disen
in position the key 306 will shift the interlock pin
gage the pinion from the rack.
to the right as viewed in Figure 7. The inter
Iteis thus possible to hold the tracer I04 against
lock pin has a bevel connection 3I6 with the end
movement as dictated by the upper tracer
of a shifter rod 3I1 which is continuously urged 50 axial
I06.
in one direction by a. spring 3I8. The rod 3" has
Remote control means have been provided for
a slot 3I3 into which ?ts a pin 320 mounted
actuating the depth control tracer valve in such
crosswise of the shaft 300 as shown in Figure 8.
a manner as to effect disengagement of the tracer
Therefore, when the shifter rod 3" is depressed
from its pattern. Referring to Figure 11 it was
it will cause rotation of the shaft 300 and thereby 55 stated supra that the valve 13 is automatically
through the eccentric connection 299 cause with
shifted upon de?ection of the tracer I08 to effect
drawal of the half-nut 235.
control connection between the tracer valve and
With the upper carrier clamped against vertical
the cylinder 20. Once this connection is estab
movement and the tracer bracket 245 free to move
lished
it can only be broken by shifting the tracer
up and down there is a possibility of collision be
60 control valve in a direction corresponding to ex
tween these two brackets and in order to prevent .
cessive de?ection of the tracer, or, in other words,
damage to the parts an interlock is ‘provided
interconnection of ports 2| 2 and 2I6.
which is effective to reduce the pump pressure in
Since the tracer I06 is inaccessible to an op
the system because such a movement would be
produced by the introduction of ?uid pressure to 65 erator standing on the ?oor beside the machine
a remote control connection is provided for this
the lower end of cylinder I9 as viewed in Figure 1.
purpose.
This is accomplished by providing a limit switch
This includes a remote control ?exible shaft
32I which when operated shuts down the motor
indicated generally by the reference numeral 342
32I’ that drives the pumps I38 and I31.
The saddle 254 as shown in Figure 6 has a rod 70 in Figure 3. The ?exible wire 343 which extends
through a ?exible sleeve 344 is connected, to an
322 slidably mounted therein and projecting be
operating rod 345 which has heads 346 and 341
low the lower end thereof for engagement by a
formed on opposite ends thereof. The rod 345
lug 323 formed integral with the saddle 253 as
is
slidable relative to a cover plate 348 attached
shown in Figure 5. The upper end of the rod
322 engages a shoulder 324 on a rocker shaft 325 75 to the end of the tracer valve plunger 209. A
spring 340 acts on the head 34'! to hold the rod
2,419,549
13
14
cluding a first pattern controlled automatic
in such a position that the head 343 will not
interfere with the normal operation of the valve.
When it is desired to shift the valve the wire
343 is pulled until the head 346 engages the plate
348 against the resistance of spring 349 after
tracer for governing two directions of said move
ment, at second pattern controlled automatic
tracer for governing a third direction of said rel
ative movement, said tracers being mounted on
one of said supports, said other support being
which further movement will shift the valve
plunger to e?ect the necessary interconnection
of ports H2 and 2l6 which will cause admission
adapted to support patterns in opposition to said
tracers, control interconnections rendering each
tracer adaptable to control at least one direction
of fluid pressure to cylinder 28 in such a direc 10 of relative movement between the other tracer
tion as to move the tracer out of engagement with
and its pattern, and means for rendering one of
the pattern and after the separation has been
said tracers non-responsive to a direction of
effected the wire 343 is released whereupon the
movement controlled by the other tracer.
tracer valve assumes its normal unde?ected posi
3. In a pattern controlled machine tool having
tion under the in?uence of spring 2H1.
a cutter support and a work support mounted for
15
This will result in the port 2l6 becoming con
three-directional relative movement, the combi
nected to the exhaust port 2l8, thereby relieving
nation of means for automatically controlling
the pressure on the lower end of piston 14 which
the three directions of movement simultaneously
will be returned to its normal position and there
including a ?rst pattern controlled automatic
by disconnect the tracer from control of the pis
tracer for governing two directions of said move
20
ment, a second pattern controlled automatic
ton 29.
The ?exible sleeve 344 is connected to a ?xed
tracer for governing a third direction of said
bracket 350 and the wire is connected at 35l to
relative movement, said tracers being mounted
a collar 352 attached to a rod 353. This rod is
on one of said supports and the other support
slidable within the tubular member 206 which as
being adapted to support patterns in opposition
shown in Figure 12 has a pair of elongated slots
to said tracers, control interconnections render
354 formed in opposite sides thereof. A pin 355
ing each tracer adaptable to control at least one
which passes through the rod 353 extends through
direction of relative movement between the other
these slots to connect the hand grip 356 to the
tracer and its pattern, and means for rendering
either tracer non-responsive to the control action
rod.
30
It will now be obvious that by vertical move
of the other tracer.
ment of the hand grip 353 the tracer valve may be
4. In a pattern controlled machine tool having
remotely controlled to effect disengagement ‘of
a cutter support and a work support mounted
the tracer by pulling upward on the hand grip.
for three-directional relative movement, the com
The tracer valve housing I05 is slidably connected
bination of means for automatically controlling
by a dovetailed guideway 351 on a knee 358 and
cross movement thereon is effected by the cross
the three directions of movement simultaneously
including a ?rst pattern controlled automatic
screw 359. A clamping member 350 is threaded
tracer for governing two directions of said move
in the tracer valve housing support for clamp
ment, a second pattern controlled automatic
ing the parts after adjustment. The knee 358 is
40 tracer for governing a third direction of said
supported by dovetailed guideways 36l for move
relative movement, said tracers being mounted on
ment relative to the bracket 254 by means of an
one of said supports, said other support being
adjusting screw 362 having an operating handle
adapted to support patterns in opposition to said
tracers, control interconnections rendering each
363.
By means of the two adjusting screws 359 and
tracer adaptable to control at least one direction
363 relative adjustment may be e?ected between
of relative movement between the other tracer
the tracer I06 and tracer I04.
and its pattern, and selective means for render
There has thus been provided an improved au
ing either tracer non-responsive to a controlled
tomatic pro?ling and die-sinking machine which
direction of movement of the other tracer.
utilizes a pair of tracers, one of which automati
5. In a pattern controlled machine tool hav
cally controls universal movement in a plane and r ing a work support and a tool support, means
the other of which automatically controls rela
mounting the tool support for two directions of
tive movement between a tool and a work piece
relative movement, a pair of tracers mounted on
in a direction at right angles to said plane.
the tool support for cooperation with patterns
What is claimed is:
carried by the work support, control connections
1. In a pattern controlled machine tool hav
from one of said tracers for controlling one direc
ing a cutter support and a work support mounted
tion of movement of the tool support, control
for three-directional relative movement, the com
connections from the other tracer for controlling
bination of means for automatically controlling
the
other direction of movement of the tool sup
the three directions of movement simultaneously
including a ?rst pattern controlled automatic 60 port, means to render one of said tracers non
responsive to . the movement controlled by the
tracer for governing two directions of said move
other tracer, and interlock means to prevent col
ment, a second pattern controlled automatic
lision of said tracers when one of them is held
tracer for governing a third direction of said rela
against movement.
,
tive movement, said tracers being mounted on one
of said supports, said other support being adapted 65
6. In automatic control means for a pattern
to support patterns in opposition to said tracers,
controlled machine tool, the combination of a pair
and control interconnections rendering each
of tracers, individual supports for each tracer, a
tracer adaptable to control at least one direction
common support for said tracer supports, means
of relative movement between the other tracer
to effect adjustment of one of said tracer sup
70 ports independently of the other including a rack
and its pattern.
2. In a pattern controlled machine tool having
and pinion, means to disconnect the pinion from
a cutter support and a work support mounted for
said rack, a ?xed support for said'common sup
three-directional relative movement, the combi
port,
means to connect the adjustable tracer sup
nation of means for automatically controlling the
three directions of movement simultaneously in 75 port to the ?xed support whereby upon movement
15
2,412,549
" of said common support only one tracer support
.‘
will be moved.
'
7. In a pattern controlled machine tool haying
a bed, a work support mounted thereon, a col
umn, a spindle carrier mounted on the column
for vertical and horizontal movement, a tracer
' support mounted on the top of the carrier for
16
its ‘respective pattern, and other means for ad
lusting the other tracer in engagement with
its pattern.
'
,
L
12. In a pattern controlled machine tool hav
ing a cutter support and a work support, the com
bination with means for mounting said supports
for three~directional relative movement of indi
movement therewith, means onv the carrierfor
vidual manually operable servo-motor mecha
adjusting the tracer support toward the work sup
port to effect control engagement of the tracer 10 nisms for each of said directions of relative move
ment, a tracer mechanism having a de?ectable
with a pattern, a vertical rod supported by the
tracer mounted on one of said supports for auto
column, a remote control ?exible shaft coupling
matic control by a pattern carried by the other
the rod with the tracer whereby actuation of the
support, disconnect devices associated with each
rod will cause movement of the tracer valve
in a direction to eifect disengagement of the 15 servo-motor mechanism for rendering the same
non-responsive to manual actuation, and means
tracer from the pattern.
‘ ‘
operable by the tracer upon initial de?ection
8. In a pattern controlled machine having a
thereof during movement in any direction by
bed, a work support slidably mounted on the bed,
any of said servo-motor mechanisms to effect
a column, a spindle'carrier mounted on the col
simultaneous disengagement of all of said dis
umn for two-directional movement, a pair of
tracers mounted on the carrier, a control valve
associated with each tracer, a selector valve
mounted on the column for connecting and dis
connecting one of said tracer control valves with
20 connecting devices.
,
13. In a pattern controlled machine tool hav
ing a work support and a tool spindle carrier
mounted on the machine for relative. movement
in a plurality of directions and a tool spindle
operating means for the movable parts, telescop
25 journaled in said carrier, the combination of a
ing control elements mounted on the column,
(pair of tracer. supports mounted onthe machine
means connecting one of said elements to the
selector valve, means to rotate said element to - and each, having a tracer extending substan
tially parallel to the axis of said spindle, means
effect shifting of said selector valve, means con
‘for adjusting said tracer supports relative to one
necting the other element to one of said tracer
30 another including individual translating screws,
valves, and means to effect axial movement of
means to disconnect one tracer support from its
the element to shift the tracer valve.
translating screw and connect it to a ?xed part
9. In a pattern controlled machine tool. having
of the machine whereby the-spindle carrier may
a work support and a tool spindle carrier sup
ported for relative movement in a plurality of 85 be bodily moved with respect to said tracer to
change the spacing between said cutter spindle
directions and a pair of tracer supports carry
and tracer.
ing automatic tracers mounted on said carrier,
14. In a pattern controlled machine tool hav
the combination of means for adjusting said
ing a work-support and a tool spindle carrier
tracer supports relative to one another includ
ing individual translating screws, means to dis 40 mounted-on the machine for relative movement
in a plurality of directions, a tool spindle jour
connect one tracer support from» its translating
naled in said carrier, said carrier having a guide
screw, a counterbalance for the disconnected
way formed therein parallel to the axis of the
tracer support and meansto connect said dis
spindle, the combination of a bracket mounted
"connected tracer support to a ?xed part of the
machine whereby said spindle carrier may move 45 on said guideway, means to adjust said bracket
parallel to the axis of the spindle, a pair of slides
without moving said disconnected tracer sup
port.
mounted on said bracket for sliding movement
normal to the axis of said spindle, a tracer head
10. In a pattern controlled machine tool hav
mounted on each slide, a tracer mounted on each
ing a cutter support and a work support, and
tracer head and extending substantially parallel
means mounting said supports upon the ma
to the axis of said spindle, and individual means
chine tool for relative movement in three di
to adjust each tracer head parallel to or laterally
rections, the combination of means for auto
of said spindle axis to determine the spacing be—
matically effecting and controlling said move
tween the spindle and each of said tracers.
ment including a rotatable direction determina
15. In a pattern controlled machine tool hav
tor, a ?rst pattern controlled automatic tracer
ing a cutter support and a work support, said
operatively connected for actuating said direc
supports being mounted on the machine for
tion determinator and thereby determining the
‘
three-directional relative movement, the com
resultant of two of the directions of relative
bination of means for effecting and controlling
movement, and asecond pattern controlled auto
matic tracer
for governing a :third direction of 60 said movement including a pair of automatic
relative movement between said supports.
tracer control mechanisms, a tool spindle Jour
naled in the cutter support, tracer ?ngers asso
11. In a pattern controlled machine tool hav
ing a cutter support and a work support, and
ciated with each of said tracer mechanisms and
means mounting said supports for three-direc
tional relative movement, the combination of a
arranged in parallel relation to 'said cutter spi'n
dle, means controlled by one of said mechanisms
for determining the direction of lateral movement
of said spindle, means controlled by the other
tracer mechanism for determining axial move
the other of said supports, servo-motor mecha
nisms each including a manually operable con
ment of said cutter spindle, and rate control
trol for producing each of said ‘three directions 70 means associated with the ?rst tracer control
mechanism for determining the ‘rate of scanning
of movement, one of said mechanisms being oper
of the second tracer ?nger.
able to move the tracers toward their respective
patterns, means to render said mechanism inop
EDWARD W. YATES.
erative upon engagement of the ?rst tracer with
pair of tracer mechanisms mounted on one sup
port for engaging separate patterns carried by
‘I’AFI‘ s. ARMANDROFF'.
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