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Jan. 7, 1947.
i
K. H. POND
2,413,781
APPARATUS FOR OPERATING MACHINE’ TOOLS
Filed April 11, 1944
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INVENTIOR.
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Jan. ‘.1, 1947,
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K. H. POND
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2,413,781
APPARATUS FOR OPERATING MACHINE TOOLS
' Filed April 11,- 1944
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INVEN TOR.
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Jan. 7, 1947.
K. H_ POND
2,413,781
APPARATUS FOR OPERATING MACHINE TOOLS
Filed April 11, 1944
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2,413,781
Patented Jan. 7, 194'?
UNITED STATES PATENT OFFICE
2,413,781
.
APPARATUS FOR OPERATING MACHINE
TOOLS
Kenneth H. Pond, Longmeadow, Mass, assignor
to Pond Engineering Company, Spring?eld,
Mass, a corporation of Massachusetts
Application April 11, 1944, Serial No. 530,536
7 Claims.
'
(01. 90—21)
1
machine as described, work is fed to work hold
ing and positioning means associated with the
transporting member and the control member is
The principal objects of the invention are di
actuated to bring about movements of the said
rected to apparatus which is connectable to a
machine tool for operating the same. That is 5 transporting means thereby to bring the tool and
work into operative relation for successive oper—
operating the same in substantially the same
ations or to produce successive objects. And
manner as it is operated by an operator.
means is provided in connection with the appa~~
In this Way an apparatus of the invention may
ratus to insure accurate positioning of the work
be connected to a number of machine tools there
with'other safety features contributing to the
by to make it possible for a single operator tobe
production of uniform objects or parts or oper
responsible for a number of machines instead
ations.
of one as is the common practice.
Various changes and modi?cations may be
According to one feature of the invention, the
This invention relates to apparatus for oper
ating machine tools.
_
made in the form of the apparatus to adapt it
apparatus is ‘of unitary‘ form so as to be self
contained and thereby adapted for connection 15 for use in connection with various machines
to any machine tool for operating the same.
therefore it is notdesired to be limited to the
speci?c form of the invention which is herein
after disclosed in the form at present preferred
and taken in connection with the accompanying
In
this way?the apparatus may be disconnected from
one machine and connected to another at will.
According to another novel feature of the in
vention the apparatus hereof is adapted for con
nection to and for the operation of existing ma
20
chine tool's, they not requiring reconstruction
a
Fig. 1 is a front elevational View of apparatus
embodying the novel features of the invention ;j
Fig. 2 is a sectional elevational view on the line
since the apparatus is intended to be accommo
dated to said existing machines.
drawings wherein:
'--2 of Fig. 1;
A
,
According to a further novel feature of the 25 Fig. 3 is a sectional plan view on the line 3-3
of Fig. 1;
invention, the apparatus is automatic in its op
Fig. 4 is a sectional elevational view on the
eration so that pieces of work or objects‘may be
line 4—4 of Fig. 1; and
produced successively without the intervention of
manual'labor.
'
Fig. 5 is a diagrammatic view to explain cer
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>
They apparatus is adaptedv for broad vapplica 30 tain features of the invention.
Referring now to the drawings in detail, the
tion wherever it is desired to produce successive
invention will be more fully explained.
operations or objects but is particularly adapted
Parts of a machine tool M such as a milling
for a machine tool where a tool and work holder
are relatively movable to bring the work and tool
into engagement for successive machining oper
ations.
machine are represented by dot-dash lines.
The
table or bed thereof which may be called a trans
35
'
While it is not intended to be so limited, the
apparatus is well suited for connection to and
for the operation of a milling machine. A com
mon form of milling machine has a rotating tool 40
or tools and a table or slide,'which may be called
a transporting member, that is provided with
work holding means. Back and forth movements
porting member is represented by Z. This sup
ports work holding means and is movable rela
tive to a bed 5 towards and away from a tool 4
which may be a rotatable cutter or cutters. A
control member 6 is swingable back and forth to
bring about movements of the transporting mem
ber 2. The said control member operates to
bring about movement of the transporting mem
of the transporting member relative to the tool or '
ber forward and back and at the desired speeds
tools ,brings worklinto engagement with the tool
or rate of movement.
A supporting structure includes side supports ’
or ‘frame members I ll that are held in spaced re
for. successive operations or the forming of suc
cessive objects. The movements of the trans
porting member are brought about or initiated
lation by rods l2 secured thereto. Also form
ing a part of the supporting structure there is a
by movement of an oscillatable or other movable
control member. It is usual with such machines 50 horizontal rod or rods [4 ?xed in the members
I [I to whichbrackets l6 are ?xed that have other
for the operator to place work in and remove
horizontal rods [8 ?xed therein. Brackets 26
it from the holding means and to shift the con
?xed on horizontal rods [8 have vertical rods 22
?xed’therein and other brackets M on the verti—
and arranged so that when connected to such a 65 cal rods have ?xed therein other horizontal rods.
trol member for each cycle of operation.
The apparatus of this invention is constructed
2,413,781
3
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one which is flexible to accommodate various con
ditions since the brackets are secured to the rods
in any place by means of pins, set screws or the
like.
4
described for driving the cam shaft ‘I0 from the
drive shaft 88.
A pulley 82 loose on drive shaft 68 may be of
any form and operably connected to any suitable
The vertical and horizontal rods together with
the brackets provide a strong rigid structure and
source of power. A gear or sprocket may be sub~
stituted for the pulley and connected to a source
of power.
The rods and brackets may thus be dis
posed in any desired relation. The vertical rods
A clutch member 84 is slidable on the shaft
or as many as may be desired thereof may ex
60 and carries a pin 88 passing through drive
tend to the floor for supporting and steadying
the structure.
Work holding means adapted to be secured to
10 member 82 for engaging a pin 08 on gear '52.
A spring 90 normally urges the clutch member
away from "pulley 82.
the transporting member 2 may ‘include a lower
member 30 and an upper member 32 pivoted
thereto at M. The upper member swings so as to.
' A lever 92 is pivoted at 94 to a bracket 95 and
has a forked upper end engaging the clutch mem
cooperate with the member 30 for engaging and
15 ber 84;‘ 'A collar‘0‘8'on the shaft 63 serves as an
holding work therebetween or for releasing the
same. Work in the illustration of the invention
abutment for said lever 92. When said lever 92
is swung counterclockwise the member 84 is
moved to the left whereby members 86 and 88 are
being described consists of a bar of 'metal W.
engaged so that gear ‘I2 is rotated by member 82
The end portion of the bar of work Wis, errgaged and disengaged so that it is presented to 20 to bring about rotation of the cam shaft ‘I0.
A cylinder I00 pivoted to the frame is of the
the tool 4 for successive operations or for the
type already described and it has a‘ rod- [02 which
forming of successive objects therefrom.
passes through lever 92 with a collar ‘.94 on its
A locator 36 is movable up and down relative
end. Movement ‘of the rod I02 to the left brings
to the member 32 and is arranged to engage the
about swinging of ‘the lever 92, as described for
end of the bar W or to be engaged by 'said bar
for locating the end portion of the bar relative
to the holding means and tool 4.
engaging the clutching members 85 and >88. ‘
A rock shaft I04 in the upper ends of the frames
I
A lever 38 is pivoted at'40 to the member 32
and has a slotted end for receiving a pm of the
locatorki‘wi as shown. Asthe said lever 38 swings ‘
the locator 36 is moved downwardly to its work
locating position and upwardly therefrom.
I2 is provided ‘on which an inner lever I06 is
?xed. An outer lever I08'is also ?xed to said
shaft I04. A rod H0 extends between and is
?xed to the upper ends of levers I08 and I06 on
which a member I I2'is‘slidable.
I
A cylinder 42. is pivoted to a bracket“, as
shown, and has a piston therein, not shown, which
carries a rod 4% engaging member 32. As the
A rod II4 connected to member II 2 extends
through guide 62 and its end is connected at H6
piston is operated to move the rod upwardly the
member 32 is swung counterclockwise for clamp
An arm H3 of lever I06 is connected by a rod
i251 to the upper end of a lever I2I which is jour
ing and holding the bar of work >W.
nalled on shaft 16. The lower end of level‘ I2I
carries a roll I22 in engagement ‘with‘a cam I24
'
vIn the form of the invention being described
to clamp 65, previously described (see Fig. 4).
there are other cylinders similar to the cylinder
42 vwhich will be described. These cylinders all
?xed on'cam shaft 10. ‘
have a piston reciprocable therein so that air
under pressure admitted to one end or the other
will act on the piston and move it in one direc
tion. A spring acting on the piston will move it
in an opposite direction. Such will be within the
tion of the apparatus the} mechanism described
skill of one skilled in the art and need not be
further
described.
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Such a cylinder is shown at 48 and a piston rod
50 thereof is pivotally connected‘ at 52 ‘to lever
38. The rod 50 swings lever 38 counterclockwise
for acting on and operating the work locator 36. '
Contacts 54 and 56 are carried by insulating
blocks 53 associated with members 32.and 38 for
a purpose later to be described.
‘
As cam shaft ‘I0 rotates in each cycle of opera
operates to feed thejwork W forwardly a cer
tain distance. The member II2' slides back and
w forth on the rod H0 as the transporting member
2 moves backv and forth towards and away from
the tool .4.
'
A spring I23 extends between member I2 and
pivotal connection of the rod I20 andlever I2I
to yieldingly hold cam roll I22 on its cam.
A clamp: I20’} is adapted to be secured to the
control lever 6, A connecting rod7l22 has one
end connected at I24 torthe clamp I20’ and its
other end is slidable ina bracket ‘24. A slide
L25 is slidable on the rod I22 and it has a pawl
I28 pivoted ‘thereto for engaging a notch in
rod I22, as shown in Fig. 1. A magnet I30 is
A bracket 68 extends outwardly from the mem
ber 30 which has a guide 62 on its outer end.
This guide 52 receives the work W for guiding
carried by the slide which when energized moves
it to the holding means, see Fig. 4. A slide 64 is
the pawl upwardly.
slidable on the work W and it has a clamp mem
A cylinder I32 is pivoted to a bracket I34 ?xed
ber 65 pivoted thereto that is adapted to fric
to a rod 22. and the end of rod I36 thereof is
tionally engage the work W as the slide is moved
connected to a plate I38 a?ixed to said slide I26.
to the left‘ in Fig. 4 and thereby feed the work
As rod I36 is’ moved to the‘ left in Fig. 1, the slide
towards the work holding and locating means.
I25 is moved so that with pawl I28 in the notch
As the slide moves to the right the clamp slides 65 of rod I22 the control member 7'6 is actuated.
along the work. In this way by successive move~
A bracket I40is adapted to be secured to the
ments of the vslide '04 back and forth the work is
transporting
member 2 and it has a lever I42
fed to the work holding and locating means in a
step by step manner.
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pivoted therein at I44. A spring I46 connected
A'drive shaft 63 is rotatable in the frames Ii) 70 at one end to the lever I42_and at its other end
to an eye I48 adapted for attachment to the
as is a cam shaft ‘I0. A gear 72 ?xed on drive
shaft 68 is in mesh with a gear 14 ?xed to a shaft
transporting member 2 urges the lever in a
‘I6 journaled in frames I0. Other gears 10 and
80 ?xed to the shafts ‘i6 and ‘I0 respectively pro
counterclockwise direction.
vide means in conjunction with the gears already
A rod I50 pivoted at one end to the lever I442
is in slidable engagement with a plate’ I52 carried
2,413,781
5
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by slide I26 and has adjustable thereon spaced
on the work W with member 66 engaging it to
collars I54 and I56.
advance the bar towards the holding means.
The locator 36 is operated so as to be engaged
by the end portion of the work bar W or to
}
A pawl I60’ swingable on a bracket member
I60 is spring pressed towards the rod I50 by a
spring I64 secured to bracket I60 and it has an
outwardly extending yieldable springlike mem
ber I66 which is engageable by a stud I68 adapted
to be affixed to the transporting member 2.
engage said bar and position it relative to the
holding means and tool subsequent to which the
member 32 is caused to clamp the work between
it and member 30 whereby the work W is held
for the machining operation as transporting
The cylinders 42, 48, I00 and I32 are con
nected by suitable conduits to valves I80, I82, 10 member 2 carries the work to the tool.
Valve I86 is operated by cam 2| 0 so that air
I84 and I86 which valves are supplied with air
is admitted to cylinder I32 the rod I36 of which
from a suitable source by means of a conduit
moves the slide I26 that acts on the control mem
I88.
ber 6. Said control member in its movement
The valves referred to may take any form
desired but‘ in the form of the invention being 15 brings about movement of the transporting mem
ber at the desired speed to present the work to
disclosed they are what may be called three
the tool for the machining operation. It will be
way valves. These valves include a body I90,
understood that in order for the slide to move the
see Fig. 2, in which a closure member or disc on
rod I22, the pawl I28 must be in the notch of
a stem I82 moves towards and away from a
seat. ' When the disc is away from the seat the 20 said rod.
The contacts 54 and 56 associated with mem
bers 32 and 38 are in a circuit including the magnet I30 and a suitable source of energy and fuhc' .A lever I94’ pivoted to the body carries a roll
tion for the following purpose.
I95. As the lever I94’ swings toward the body
As the lever 38 swings to carry the contact 56'
the stem is pressed inwardly to move the disc 25
downwardly as it does when the positioner is
from off its seat and air passes through the
moved downwardly said contact strikes and
valve to the cylinder. A spring in the valve urges
passes the contact 54. However, should move
the disc onto its seat so that as the lever swings
ment of the positioner 36 downwardly be inter
outwardly from the body the disc engages its
seat to stop the flow of air to the cylinder. 30 fered with by jamming of the work or should it
for some reason be impossible for the positioner
The valve is provided with vent means so that
to make a complete stroke, the lever 38 is stopped .
when the disc is on its seat, pressure between
so that contacts 54 and 56 are engaged whereby
the valve and its cylinder is relieved whereby
the magnet I30 is energized to pull pawl I28 up
the piston and its rod may be returned to its
wardly. Then slide I26 moves forwardly without
inoperative position.
moving said rod I22. In this way control lever
Each of the valves I80, I82 and I86 are affixed
6 is not actuated and the transporting member
to pairs of levers such as 200. These levers 200
2 is not moved forwardly to present improperly
are swingable at upper ends on the main drive
located work to the tool.
shaft 68 while their lower ends are forked at
Normally in each cycle of operation the rod
202 to straddle a rod 204 ?xed in frame members
I 22 is moved by the pawl I28 50 that control mem
I 0. Adjusting screws 206' in the forked ends
ber 6 is actuated for bringing about movement
of the members 260 engage opposite sides of the
of the transporting member 2 and as the said
rod 204 so that the lower ends of the levers 200
member 2 moves forwardly the lever I 42 moves
may be moved back and forth to adjust the posi
tion of the valves and their levers, such as I94, 45 away from the lever I84’ of the valve I84 where
upon said valve is closed and spring 90 moves
relative to cams 206, 208 and 2I0 which are ?xed
clutch member 84 to disengage members 86 and
on cam shaft 10.
88. This stops rotation of the cam shaft 68.
’ The cams referred to are so constructed and
Each time the transporting member reaches
related as to operate their respective valves in
50 its rear position the lever I84’ of valve I 84 is
the desired timed relation.
operated so that the cam shaft is operated for
The valve I84 for cylinder I00 is supported by
operating
the various units as before described
rod 26 and its lever I84’ is engaged for operation '
and as the transporting member moves forwardly
of the valve by lever I42.
the cam shaft is stopped.
In operation the machine tool is put in opera
In this way in each cycle of operation the cam
tion and drive member 82 is continuously rotated. 55
shaft is rotated and then stopped.
That is the tool 4 of the machine tool is rotated
It will be noted that the slide I26 operates the
while the mechanism of the machineltool is set
rod I22 and thereby control lever 6 only when
valve passes air to the cylinder to which it is
connected.
'
in operation and back and forth movements of the
the positioner 36 is able to perform its function.
transporting member 2 are under the control of
In the event the member 36 is unable to func
60
control member 6.
tion properly and for that reason slide I26 does
The transporting member 2 in its rearward po
not operate control member 6 the transporting
sition causes lever I42 ‘to actuate valve I84 so
member 2 remains in its rear position so that
that air is supplied the clutch operating cylinder
lever, I42 would be held open and the cam shaft
_ I00. Said cylinder in its operation brings about G 5 ‘I0 would continue to operate.
swinging of lever 92 so that member 84 is moved
To prevent continued rotation of the cam shaft
inwardly to engage 86 and 88. With drive mem
ber 82 being in continuous rotation the cam shaft
10 through gears ‘I2, ‘I4 and ‘I8, 80 is now rotated
whereby the several cams perform their func
tions, The member 32 releasing the work W the
cams 206 and 268 are operated so that valves I80
and I82 admit air to cylinders 42 and 48. Previ
ously cam I24 acts on lever I2I and through rod
I20 and lever I06 the slide 64 moves forwardly
when the transporting member 2 remains in its
rear position the rod I50 and plate I52 come into
play in the following manner:
As the slide I26 moves forwardly the plate I52
0
thereof engages collar I54 of rod I50 which is
connected to lever I42 and moves said rod I50
forwardly to swing the lever I42 so that it re
leases the lever I84' of valve I84 allowing it to
75
close.‘ Also the movement of the rod brings co1
'7
lar l5§§ thereof forwardly ofthe free end of the,
pawl I'?g'lf whichpawlholdsitherod‘15? against
rearward ‘movement'and'thereby lever I411~ is, held,
drive, shaft, clutch mechanism for engaging said
drive shaft‘and driving ‘memberfandoperating
meansjoroperating said clutch‘ mechanism op
against‘ spring _ I lit, from “ ‘engaging " valve _‘'lever
erable"by”the"said1slide, each of saidoperating
means‘, including‘a’, cylinder and conduits con
'84,;
Normally the ‘stud i368 on the transporting
nected to 'sa‘idf cylinders having cam operated
memberjin its forward__ and , rearward movements
valveimeans therefor.
?exes the spring I66 of the pawl and is'arranged
to move pawl I56’ out of the way of the ‘collar
The, combination. of a machine tool having
a_ rotatable to‘ol‘andislide movable towards and
I56 on rearward movement. When the trans
porting member is stationary in its rear, posi
away therefrom with, a s'wingable' slide control
lever_,thereforfand iw‘ork positioning and ‘holding
tionthe pawl is allowed to functionv forjthe?ur
‘
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means‘, ‘on’ is‘aid'f' nice‘, ‘having actuating means
therefor with separate unitary operating mech
The valves and their cams may be arranged rel
anism therefor comprising, a frame construction,
atively to bring about any desired ‘sequence of, 15 operating‘nie'ansfor" said control lever, a drive
operations during a cycle of operation; thefore
“ shaft'rot'atable', in said frame construction, con
going being intended for purpose of disclosure.
nect'ions‘f between said, drive shaft and ‘said op
' The invention may be embodiedin other spe
eratingfineans, 'a‘ driving member rotatable on
ci?c forms without departing from the essential
saidi‘d'rivefsh?aft, clutch mechanism for engag
characteristics thereof. Hence, the present em 20 ingsaid driv'e 'sha'ftf‘and driving member, and
pose‘ described.
'
'_
bodiments are therefore to be considered‘ in all
respects merely as being illustrative and not as
' operati'n'gmeans for; operating said clutch mech
being restrictive, the scope of the invention being
mechanism and operating means therefor con
anism' operable by" the said slide, saidiclutch
indicated by the appended claims rather than‘by
structed for, clutching operation as the slide
the foregoing description, and all modi?cations 25 moves in one direction and arranged for one cycle
and variations as fall within the meaning and
of operation of the said drive shaft for each
purview and range of equivalency of the appended
saidrnovement of said slide.
claims are therefore intended to, be embraced
'5‘.'The combination of a machine tool having
therein.
.
What it is desired toclaim and secure by Let
ters Patent of the United States'is:
1. The combination of a machine tool, hav
a rotatable tool and slide movable towards and
30 away therefrom with a swingable slide control
lever therefor and work positioning and hold
ing means on said slide having actuating means
therefor’ with separate unitary operating mech
ing a rotatable tool and slide movable towards
and away therefrom with a swingable slide con
anism therefor comprising, a frame construc
tion, operating means for said control lever in
cluding disengageable connections, a drive shaft
rotatable in said frame construction, connec
trol levertherefor and work positioning and hold
ing means on said slide having actuating means
therefor with separate unitary operating mecha
nism therefor comprising, a frame construction,
tionsbetween said drive shaft‘ and said operat
operating means for said control lever, a drive
ing‘meanfs‘, a, drivingmember rotatable on'said
shaft rotatable in said frame construction, con 4-0 drive "shaft, clutch mechanism for engaging said
nections between said drive shaft and 'saidoper
ating means, a driving member rotatableon said
drive shaft, clutch mechanism for engaging said
drive shaft and driving member, and operating
drive‘ shaft and‘clr'iving member, operating means
for said clutch mechanism operable by said slide
as it moves in onedirection, and means actuated
by thef'work holding'arld positioning means for
disengaging the disengageable connections, said
means for operating said clutch mechanism oper
able by the said slide.
'
2. The combination of a machinetool having
a rotatable tool andslide movable‘ towards and
away therefrom with a swingable slide control
lever therefor and work positioning and holding
means on said slide having actuating means‘
therefor with separate unitaryvoperating mech:
anism therefor comprising, a frame construction,
operating means for said control ‘lever including
disengageable connections, a drive‘, shaft rotate"
able in said frame construction, connections be
tween said drive shaft and said operating means,
a driving member rotatableon‘said drive shaft,
clutch mechanism for engaging said drive shaft
and driving member, operating means for, said
clutch mechanism operable by said ,slide 'as'it
moves
one direction, and means actuatedby‘,
the work holding andv positioning‘, means for dis
engaging the disengageable connections. "
3. The combinationof a, machine‘, tool having
a rotatable tool andslide movable; towards and
away therefrom' with a swingable slide control,
lever therefor and work positioning and holding
means on said slide having actuating; means
59.
disengageablefconnections including a rod se
cured ‘to’ said lever having a member slidable
thereon which is provided with a pawl engage
able witha notch provided in said rod and the
means ‘for engaging and,v disengaging said con
nections including a, m'agnet'operably related to
said liawl.
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6Qv The ‘combination ofa machine ,tool having
arotatable tool and slide movable towards and
away therefrom with a swingable'slide control
leverther'eforjand work positioning and holding
means " on said. slide having actuating means
therefor 'witli's'eparate unitary operating mech
anism therefor comprising, a frame construction,
operatingmeans‘ for ‘ said control‘ lever including
disengageable connections, a drive shaft rotat
abley'i'n said ‘frame construction, connections be
tweenrsaid drive ‘shaft and said operating means,
a-driving‘member' rotatable on said drive shaft,
clutch ‘mecnamsmror' engaging said drive shaft
and"d‘r'iving ‘member, operating means ‘for said
clutch mechanism operable "by, said slide as it
moves in one direction, and means'act‘uated by
the work holding and, positioning means for dis
therefor with separate unitary operating mech 70 engaging the; disengageable connections, said
anism therefor cQmprisingQa frameconstruction,
clutch‘ mechanism and _‘operating means therefor
operating means for said control lever, afdrive
constructed and arranged whereby said drive
shaft rotatable in said frame construction, con
shaft and driving member are engaged for oper
nections between said ‘drive'sha'ft' and said‘op'er
ation ofsaid; shaft through one‘ cycle of oper
ating means, a driving member rotatable on said 75 arise, for. Bash, mpvemenibi thaslide in Said‘ one '
2,413,781
9
10v
direction and said disengageable connections ar
ranged for disengagement as the said slide moves
in an opposite direction.
'7. The combination of a machine tool having
slide and clutch means operable as said slide
moves in one direction whereby said shaft is ro
tated through the clutch mechanism for one cycle
of operation, connections between said drive shaft I
and control lever whereby said lever may be oper
ated as the slide moves in one direction, disen
gageable means in said connections, and means
connecting said work positioning means and dis
means on said slide having actuating means
engageable means whereby the latter may be dis
therefor with separate unitary operating mech
anism therefor comprising, a frame construc 10 engaged by the former so that the control lever
a rotatable tool and slide movable towards and
away therefrom with a swingable slide control
lever therefor and work positioning and holding
tion, a drive shaft rotatable in said frame con
struction having a drive member rotatable there
on, clutch means for engaging said shaft and
member and operative connections between said
is not operated as the slide moves in said one
direction.
KENNETH H. POND.
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