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., " 2,111,288;
March 175, ,1938.1 , _
MILLING MÁGHINE‘~
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Filed Nov. 22, 19,35 '
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' '-4 sheets-Sheet 1
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ATTORNEY.
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l March 15, 1938. `
H„~H¢R|__ACHER
MILLING MACHINE
-Filed NOV. 22, 1935
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2,111,288
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4 Sheets-Sheet 3
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ATTORNEY.
March 115,- 1938.
2,111,288
' H; HoRLÁcHIi-:R
MILLING MACHINE
"Filed Nov. 22, 1955
4 Sheets-Sheet 4
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ATTORNEY.
2,111,288
Patented' Mar. 15, 1938
UNITED STATES VPMI-:NT "oi-‘Fics
MILLING
Herman Hoi-lacher, lCincinnati, Ohio, assignor to
The Cincinnati Milling Machine Co., Cincin
nati, Ohio, a corporation of Ohio
Application November 22, 1935, Serial No. 51,124
7 Claims. (Cl. 90--21.5) ,
This invention relates to machine tools and -up with the ordinary and conventional types of
milling machines.
more particularly to an improved form of mill
The machine of this invention has been so
ing machine.
One of the objects of this invention is to pro
5 vide a machine ‘tool in which cutting paths in
angularly related planes may be obtained ‘and
without changingl the setup of a Work piece.
Another object of this invention is to provide
a machine tool in which rcutting paths may be'
. .l O generated in angularly related planes, and mech
anism for preventing generation of more than one
y cutting path at a time.
A further object of this invention is to pro
_ vide a machine tool for generating. cutting paths
' A‘lying in different planes.
'
'
Other objects and advantages of the present
invention should be readily apparent hy reference
to the following specification, considered in con“
junction with the accompanying drawings form
0 ing a part thereof and it is to be understood that
any modiiications may be made in the exact
structural details there shown and descriloed,`
within the scope of the appended claims, without
departing from or exceeding the -spirit of the
invention.
~
Referring to the drawings in which like refer»
contrived that a number of surfaces not sus
ceptible of being machined in a single operation
on conventional machines may be machined in a
single setup of the work piece. Such a machine
is illustrated in Figures 1 and 3 of the draw
ings and comprises a large rectangular base por
tion iii upon which is formed suitable guide: 10
ways it for receiving and supporting a Work
receiving table it. Mounted on another portion
of the bed it is an upstanding structure I3 in
which is journaled a pair of cutter spindles I4
and it. The structure it has a guideway i6
formed on the top thereof in which is slidably
mounted a spindle carrier i‘i having a cutter
spindle it rotatably journaled in the end thereof.
Power operable means are provided for re
ciprocating the table it transversely of the cut
ter spindles it .and it whereby a cutting path
may he generated parallel to the direction of
movement of the table; and additional power
operable means have been provided for moving
the spindle carrier i'i along a path angularly re 25
lated to the path of movement of the table where
` by a cutting path may be generated when the
ence numerals indicate liire or similar parts:
table is >held stationary whichhas a direction
Figure l is a front elevation of a machine tool
which is angularly related to the direction of
embodying the principles of this invention.
'30
Figure 2 is a sectional view showing the power
transmission to the vertical spindle of the ina
chine.
Figure V3 is a plan view >of the machine shown
in Figure 1.
_
Figure i is a sectional view 'showing the power
transmission to the horizontal cutter spindles.
Figure 5 is a detail view in elevation ci the
trip mechanism associated with the movable cut
ter spindle carrier.
_
Figure 6 is a planview of a portion oi the
mechanism shown in Figure 5, as viewed on the
`line t-t oi that figure. \
Figure 7 is a plan view of the trip mechanism
mounted on the rear side of the work table.
Figure 8 is ‘a detail section on the line t-»t of
Figure l.
‘
.
..
- table movement.
-
30
Separate power operable means have been pro
vided for rotating the vertical spindle and the
horizontal spindles and these means are illus
trated in Figures 2 and t respectively of the
drawings. The power transmission for rotat 35
ing the vertical spindle is shown in Figure 2 and
is self-contained and movable with the carrier
ill.
This transmission includes a prime mover,
such as the electric motor it, which is connected
through a chain drive ‘it for rotation of shaft 2 i. 4:0
This shait has a bevel pinion 22 which ínter
meshes with a large bevel gear ‘it which is jour
naled in anti-'friction hearings 2t and which has
a splined connection with the spindle i8. The
spindle4 It is anti-frictionally journaled in a d5
>quill mi which is vertically adjusted in the car
Figure 9 is a detail view as taken on the line ii-ii
rier il whereby the plane of rotation of the cut
ter 2li attached to the spindle may he variably
Figure 10 is a detail view taken on the linev determined.
it-it of Figure l.
The quill adjusting mechanism may be of a 50
Figure 1l is a view in elevation as taken on conventional type comprising a manually rotat
the line ii-ii of Figure 10.
‘
able shaft 2l which is connected through bevel
Figure l2 is a. diagrammatic view of the trans- .
gearing 28 to a worm Wheel it, íntermeshing with
mission and control mechanism for the machine. suitably formed teeth iii) cut in the periphery of
In milling large castings there is usually a
number of plain surfaces to be finished or ma-n the quill 25. There has thus been provided a
chined, but dueto the size of the casting the carrier which is movable in an angular‘relation
with respect to the table and which has self
surfaces are widely separated and lie in ldif
of Figure 8.
ferent planes which prevents the possibility oi
60. milling more than one surface‘in a single seti»
contained therein a power transmission for ro
tating a. Yelftlcal spindle which is axially adjust
2,111,258
able in accordance with the height of the surface - tion. Thus, no-fluid will be delivered to the cyl
to be finished.
Thehorizontal cutter spindles I4 and I5, shown
in Figure 4, are driven from a second prime
mover, such as the motor 5| which is mounted
upon the top of the structure i3 connected by
a chain and sprocket drive 32 for rotation of a
common drive shaft 33. This. shaft carries a
pinion 34 which rotates spur gear 35 for rotation
10 of cutter spindle I5; and drives spur gear 35 for
rotation of spindle I4, the spur gear 35 inter
meshing with gear 31 .which has a spline- con
nection with spindle |4.
.
The cutter spindle |4 is anti-frictionally jour
15 naled at one end in an adjustable quill 35 where
inder 55, but will be delivered to the cylinder 53.
In the latter case, the port 53 of valve 55,
which`is connected by channel 54 to the feed
port 55 of cylinder 53, is connected by a can
nelure 55 in plunger 52 to port 51. The variable
delivery feed pump 55 has a delivery line 55
connected to port 51 and a return line 55 which
is connected to port 15. The port 15 is con
nected by a cannelure 1| to port 12 of valve 55 10
and this port is ~connected by channel 13 to the
other end of cylinder 53. Thus, .the fluid from
the variable delivery pump 55 is delivered to
one end of cylinder 55 and the fluid escaping
from the other end of the cylinder is returned 15
may be variably located in accordance with the
to 'the intake of the variable delivery pump. In
order to care for any leakage of oil from the
position of the surface to be finished. A mech
anism indicated generally by the reference nu
system and to insure a constant pressure, a low
volume high pressure booster pump 51 is super
meral 45 may be utilised for adjusting the quill
charged by the rapid traverse pump 55 through
channel 14 and the delivery port of the pump is
connected by channel 15 to channel 55 which is
the delivery line of the variable feed pump.
It will be noted that the port 51 is in the form
by a cutter 35 attached to theend of the spindle
and this mechanism may be the same as that
described in connection with the quill adjusting
mechanism shown in Figure 2.
The cutter spindle I5 is eccentrically Journaled
in a quill 4| and‘has an internal gear 42 keyed . of an annular groove in valve 55 and this annular
to the upper end thereof. The internal gear 42 l'groove is connected by channel 15 to port 11 of
meshes with a spur gear 45 which is fixed with valve 55. The port 11 thus corresponds to port
shaft 44 which carries the spur gear 35. By 51 of valve 55 in that both are supplied from the
means of this arrangement the cutter spindle |5 lvariable delivery feed pump 55 so that by con
may be rotated in its eccentric position and the necting either of these ports to the respective
cylinders, the respectivel slides will be moved at
quill 4| may be rotatably adjusted without break
a feed rate; Similarly, the port 15 is connected
ing the driving connection to the spindle. ~
In addition the internal gear 42 has elongated by a channel 15 to port 15 of valve 55 so that
the return side of cylinder 55 may be connected
teeth whereby the quill 4| may be axially ad
justed to vary the cutting plane of the cutter 45 to the intake side of the variable delivery pump
when the output of the pump is connected to the
attached to the end of spindle I 5. 4A quill adjust
ing mechanism, indicated generally by the ref~ opposite _end of the cylinder.
As previously mentioned, the valve plunger 5I
erence numeral 45, is provided for effecting'axial
adjustment of the quill. ' 'I‘he support Il is di
40 vided, as shown at 41 in Figure 1, for clamping
` purposes and a pair of clamping bolts 45 are
provided for securely clamping the quill in any
adjusted position. It will be noted from Figure 1
that the end of the quill 4| _has a plurality of
radial holes 45 drilled in the periphery thereof
whereby a suitably formed wrench may be uti
lized for changing the eccentric position of the
cutter spindle. By means of this arrangement
the cutter 45 may be raised or lowered in a ver
50 tical plane and axially adjusted in a horizontal
so'
is in a stop position and therefore the- pressure
port 11 is disconnected by the spool 55 from port
5| and channel 52 leading to one end of cylinder
55. Likewise the port 15 is disconnected by the
valve spool 53 from port 54 and channel 55 lead
ing to the opposite end of cylinder 55.
The rapid traverse pump 55 is utilized for re 45
turning either oi' the slides to a starting position
at a fast rate and has a delivery channel 55 which
is connected to port 51 of valve 55. When the
pump is not being utilized for effecting movement
of the slide, it is desirable that the same be con
nected to reservoir so as to eliminate high pres
>plane in accordance with the position of the sur
. sures building up in the various channels. There
face on the work which is to be finished.
Fluid operable means are provided for recipro
fore, at this time, the port 51 is connected by
cating the table I2 and the carrier i1. As shown cannelure __55 to port 59 and channel 55. This
channel is connected by port 9|, cannelure 52 55
55 in Figure l2, a cylinder 55 having a contained
piston 5| is provided for moving the table i2, the and port 53 to the return line 54 which leads to
piston being connected by a piston rod 52 to the the reservoir 95". The port 51 thus becomes the
end of the table.
rapid traverse supply port for valve 55 and the
A cylinder 53 having a contained piston 54 is port 9| the rapid traverse supply port for valve
59. In other words, when the plunger 52 is shift
60 provided for moving the carrier, the piston being
connected by the piston rod 55 to one end of ed to the extreme right position it moves a suf
the carrier.
ilcient distance to interconnect port 9| with port
Fluid is supplied to these cylinders from a com
12, whereby fluid from pump 55 will be delivered
mon set of pumps including a‘variable delivery to the end of cylinder 53 opposite to the feed port
feed pump 55, a pump 51 and a rapid traverse 55 to thereby cause a rapid return movement of
pump 55. A first control valve 55 is provided the slide i1. At this time the channel 54 is con
for determining the coupling of the pumps to the nected by the cannelure 55 to the return port
cylinder 55, and a second control valve 55 is pro
55 which is connected by branch 51 to the return ‘
vided for controlling the flow to cylinder 55. line 54. When the plunger 52 is in the same
These valves are exactly the same in construc
position as the plunger 5| is now shown the
tion and ‘each one has three positions, including slide |1 will be stopped.
.
a feed position, a central or stop position and a
The valve~ plunger 5| which controls movement
rapid traverse position. The plunger 5| of valve
55 is shown in a stop position and the plunger
75 52 of valve 55 is shown in a feed forward P951
of slide I 2 has the same three positions as plunger
52v and when shifted to the left will connect the
feed port 11 to port 5| to cause feed movement
'
2,111,288
of slide l2 ltoward the left; and in its'other ex
treme position will connect the rapid traverse
port 01 to port 84 to cause a rapid return move
ment of slide l2. 'I'he valve plunger 82 is shifted
by a lever arm 98 connected to rotatable shaft
99. The shaft 99 extends through the bed of the
machine, as shown in “Figure 1, where it is pro
vided with a manually-operable handle |00.
The shaft 99 is also adapted to be trip actuated
10 from a feed position to a rapid traverse position.
The shaft 99 extends through to the opposite
'
“
3
_
prevent the. operator from actuating the control
lever |00 in a direction to complete this move
ment,»which would result in the slide moving
ahead again on a. feed stroke.
The valve plunger 6| is operated by a simple Ul
trip mechanism comprising a trip plunger |22
to which is attached another trip lever ||0 which
is operable by dogs |23 and |24 carried by the
slide |2. Also attached to the trip plunger |22
is a lever |25 which is connected by a link |26
,to a lever |21 which is keyed to shaft |28. This
end of the bed where it is provided with crank ' shaft carries another detent plate |20 having a
arm |0| which is connected by a link |02 to the
’ oscillatable member |03.
spring pressed detent |2|. A manually operable
This member has a
lever |29 mounted on the front of the machine is
15 pivotal connection at |04 to'a link |05 which is
keyed to the end of the shaft |28 for manual op
eration of the valve plunger 6| through the lever
|30 keyed to shaft |28. In the position of the
operatively connected througha bell crankv|06
to- link |01. The link |01 is connected to the
crank arm |09 of a trip plunger |09. A trip lever
i |0 is attached to the trip plungerfand has a pair
20 of contact portions ||| and ||2 at opposite ex
tremities thereof which, as shown in' Figure 6,
lie in different planes. The contact portion |||
is adapted to be engaged by trip dog. t and the
portion ||2 is adapted to be engaged by the trip
25 dog lli. A detent plate M5 is keyed to the
will permit movement of the lever in a counter
clockwise direction to institute a feeding move
ment of slide I2.
-
'
An interlocking mechanism has been provided
fora preventing ymovement of either hand lever
associated therewith tor normally holding the
|00 or hand lever |29 to a feed position when the
other has already been moved to such a position
and comprises an interlock lever |3i formed
trip plunger in either one of two rotatable posi
integral Withthe pivoted member |03 which is
plunger |09 and a spring pressed detent ~|| 6 is
tions.
30
parts shown the trip dog |23 prevents movement
oi' the trip lever |30 in a clockwise direction, but
i
.
-
‘
in other Words, as the slide il? advances on its
adapted to cooperate with an interlock plate
|32 carried by the slide i2. The plate |32 has
a notch |33 formed in it which is adapted to
receive a roller |34 carried in the end of lever
l3| when the slide l2 is in a returned stop po
sition. ` If the slide i2 is actuated, the roller i3
is moved out of the slot by the moving plate itt, 35
detent plate t. lit will be noted, however, that » which rotates the shaft 33 and detent |20 in a
the notches il! and itt in the detent' plate are clockwise direction to a mid-position if not,`
cut to different depths so that the peak t is not already in such position, further movement in'
located midway of the throw oi the lever, but that direction is prevented by the lever H0 con
iacting the tn'p dog H3. It will thus be seen 4:0
to one side oi the center whereby after approxi
that during the movement of the slide I2 the
mately one-third of the Athrow has been com
. pleteol the detent member it wiil ride over the valve plunger 62 is located in an intermediate
feeding stroke, which would be to the left as
viewed in Figure 5, the trip dog H3 will engage
the contact portion iii and rotate plunger» 003
in a counterclockwise direction, as viewed in
`Figure 5. This wili aiso cause rotation oi’ the
peak and automatically complete the remainder
of thé throw. A similar detent lever iii is asso
ciated with the shaft itt“ and has a cooperating
spring pressed detent t it . IThe end of this detent
' lever is formed the same as lever
tit and there
fore will assist in completing the automatic shitt
ing of plunger t2. By having a detent lever at
position.
v
'
Similarly, when the slide -_«||1 is moving, a de
tent plateiâü attached to the slide l1 engages the Li5
end of an interlock lever |30 4which is keyed to a
rotatable shaft |31, this shaft having an arm i3@
connected by intermediate linkage, .to _shaft |22.
This linkage comprises a link |39 which is con
50 each end of the linkage it is possible to obtain 'nected through a bell crank |40 to a’ link iti
accurate positioning of the valve plunger t2, as 4which, in turn, is pivotally connected to lever
Iltiiof trip plunger |22, When-the slide il is in
well as accurate positioning of the trip plunger.
When the valve piunger tt is shifted to its its return position the end of the interlock lever extreme right position ‘by the trip mechanism, iii'ß..may move in a clockwise direction beyond
55 the rate, as well as the direction of movement. of the‘encl of plate- |35.- But when the slide |1 is 55
the slide il is changed because, first, the rapid ' eigeciiting a. cycle, movement of lever' '|30 con
traverse pump is connected to the cylinder 53 and nected to plunger |3| is‘_prevented in one di
furthermore this pump is connected to the op À'rection by interlock lever |36 engaging inter
posite end of the. cylinder to which the i’eed pump lock plate |35, andin the opposite direction b
60 was connected.
trip arml IIlengagingY-trip dog |23.
-
¿t separate stop~1ever- M2 has been provided on
tion at a rapid traverse'ratethe dog tit will en- , the front of the machine, as shown in. Figure l,
gage the contact portion iii offlever i and and this lever is so connected that regardless of
“rotate the same in a clockwise direction, as viewed which slide is being moved, operation of this
in Figure 5. This movement _will continue until lever will stop said movement. This lever is con
the valve t2 has moved sufliciently toward the nected to a shaft |03, which, as shown in Figure
8, has a crank arm Itri connected by a link itt
left ‘to disconnect the' rapid traverse port @i from to
acrank arm |06 keyed to shaft |41. The
port 12, but further movement oi the valve shaft |41 actually extends in a vertical direction
plunger will not take place due to the fact that in the machine, as shown in Figure 9, and has
the detent members i it and |2| are in the deeper aA pair of spools |40 keyed thereto, each spool
detents and the trip operated movement is not having a ñat side |49. These spools are posi
suiiicient to move them over the peak points on ticned opposite the detent levers |20 whereby
the detent levers. The result is that the slide is when they are in the position shown in Fig
75 stopped. This condition of the parts does not ures l0 and 11 the levers may be rotated but 75
As the 4slide il? returns toits starting posi
4
ananas
when the spool is rotated to the position shown
in Figures 8 and 9, the detent levers will be
moved to a central position and heldin such po
sition against movement until the stop lever is
returned to a running position.
If it is desired that the slide -|1 move at vari
able rates, a rate control cam |50 may be at
tached to the side of the slide for cooperation
interlock means to prevent utilization of more
than one of said valves at a time.
4. In a milling machine having a bed, a cutting
means carried by the bed, a work slide and a cut
ter slide carried by the bed, the combination of
transmission means for effecting sequential move
ment of the slides to produce different cutting
paths including fluid operable pistons, individual
with a crank |5| which is connected by link |52, « control valves therefor having stop positions,
bell crank |55 and link |54 to lever |55 pivotally means to move either of said valves from its stop 10
mounted on the fixed shaft |56. 'I'he lever |55 position to an operating position, and positive
acting means effective on said movement for
may have integrally connected therewith a suit
ably shaped cam member |51 which can engage holding the other _valve in a stop position, said
the roller |55 in the end of the pump control positive acting means including a dog carried by
pendulum |55 whereby rotation of the cam |51 the slide, a plate carried by the moving slide‘and 15
linkage interposed therebetween and connected to
in a clockwise -direction will increase the dis
' ’
placement of the pump. A spring |50 may be the valve.
5. In a millingmachine having a bed, a cutter
attached to the cam |51 to rotate the same in a
counterclockwise direction and permit the pump spindle journaled on the bed, a work slide, and a
cutter slide having a cutter spindle journaled
20 pendulum to return to a zero displacement po
therein, the combination of transmission means
sition.
'I‘here has thus been provided an improved -for producing different cutting paths including
machine for the purposes disclosed which is branch transmissions to each slide, control mem
simple to construct and operate and which makes bers for each branch transmission having a cen
rit possible to machine a number of surfaces on a trai or stop position, a feed position on one side
land a rapid traverse position on the other side of
single set-up of a work piece, which would nor
mally be inaccessible' on the conventional type said central position, means carried by the slides
when in a starting position to prevent movement
of machines and therefore require- a second set
of either of. said controls to a rapid traverse
up in order to machine them'.
position, either of said controls being movable at
I claim:
l. In a machine tool having a work support will however to a feed position to cause movement
and a tool support, the combination of power- of its respective slide, and means positionable by
operable means for effecting a ,cycle of movement the moved slide as it leaves its starting position
between the supports including feed forward,
reverse, and rapid return; a shiftable control
member having a central position which stops
the support, and positions on either side thereof
to effect feed advance and rapid return, a detent
mechanism'associated with said control mem
ber, a trip plunger operable by the slide, a de
tent plate having notches of different depth, and
a cooperating spring pressed detent whereby a
predetermined movement of the trip plunger in
one direction will effect shifting of said control
member from one extreme position to the other,_
but movement of the trip plunger the same pre
determined amount of movement in the opposite
direction will only shift said control member
from an extreme position to a central position.
2. In a machine tool having a pair oi' slides
to lock the control member of the other slide in
its stop position.
6. In a milling machine having a bed, a‘cutter
spindle journaled in the bed, a work slide, and a
cutter supporting slide, the combination oi' trans
mission means for moving each of said slides for
producing different cutting paths includins
branch transmissions to each slide, individual rate
and direction control members therefor having a
_ stop position, a feed forward position and a rapid
return position, a trip plunger associated with
each slide.linkages operatively connecting the trip 45
plungers to the respective control members, man
ual control levers for the control members and
remotely located with respect to said trip plung
ers, dogs carried by each of said slides and effec
tive upon return movement thereof to shift said
selectively movable to generate different cutting
control members to a stop position, each linkage
paths,~ the combination'of power operable means
including an interlock lever, interlock plates car
ried by the slides and cooperating with the inter
lock lever of the other slide whereby upon move
ment of one slide the control linkage of the other
for moving the respective. slides including indi
vidual controls, each movable to a starting po
sition to initiate a cycle of movement of .the re
spective slides, and .means carried by the slides
whereby the moving slide will automatically pre
vent movement of the control lever for the'other
slide to a starting position, including a plate car
ried by the slide and a pivoted member opera
tively connected to the control lever, said member
being positioned to engage said plate when the
lever is in a stop position.
3. In a machine tool having a pair of movable
slides and fluid operable motors for moving the
respective slides, the combination of means for
controlling operation of said motors, including
individual control valves therefor, a feed pump
connected in parallel to said valves, a rapid trav
70 erse pump connected in series to said valves,_
means in each valve to connect the feed pump for
operation of the respective motor in one direction
and to connect the rapid traverse pump for oper
ation of the motor in an opposite direction, and
slide is locked; and relieved portions in each plate
and eñective when the slides are in a starting
position to permit operation of either linkage at
will
7. In a machine tool having a cutter support
and a work support, one of which is movable
relative to the other, the combination with trans
mission means for effecting said movement, of a
transmission control member, a trip control
plunger associated with the movable slide and re
motely located with respect to said control mem
ber, a linkage mechanism interconnecting said
trip plunger for transmission of movement to
said control lever, and a detent mechanism con
nected to each end of said linkage for insuring
accurate positioning of both said trip plunger and
said control member.
~
È
HERMAN HORLACHER.
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