US2257450A - Feed for forming machines - Google Patents

Description

Sept. 30,1941. L. w. BARNES FEED FOR FORMING MACHINES 3 Sheets-Sheet 1 Filed July 19, 1946 BY g ATTORNEY5.

Sept. 30, 1941. L. w. BARNES 2,257,450

FEED FOR FORMING MACHINES Filed July 19, 1940 5 Sheets-Sheet 2 Ill Z I INVENTOR ATTRNEYS 7 Sept. 30, 1941. L. w. BARNES FEED FOR FORMING MACHINES 3 Sheets-Sheet 5 Filed July 19, 1940 INVENTOR ATTORNEY Patented Sept. 30, 1941 UNITED FEED FOR FORMING MACHINES Leslie W. Barnes, Long Hill, Conn., assignor to The Baird Machine Company, Stratford, Conn., a corporation of Connecticut Application July 19, 1940, Serial No. 346,335

14 Claims. (Cl. 140-130) This invention relates to a feed for a forming machine, or any other machine requiring a similar feed, and has for an object to provide an improved feed in which the feed grip for advancing the Work and the clamp for holding the work on the reverse movement of the feed grip are operated by the same mechanism, with which they are always in controlled relation in all positions of the feed slide, so that retiming of the clamp or of the feed does notthrow the feed grip out of synchronism with the clamp, but on adjust-' ment of the feed grip operating means the operation of the clamp automatically remains in time with the feed so that a separate adjustment or timing of the clamp is not necessary.

It is also an object of the invention to provide a construction and arrangement whereby when the feed grip is adjusted the clamp is always maintained in timed relation thereto without further adjustment.

It is a further object of the invention to provide a construction in which there is surplus of motion in operation of the feed grip to grip the work and the clamp to clamp the work so that thefeed grip grips the'work before the clamp is released and vice versa, and the work is always held by one or the other means so that it cannot shift in relation to the following operations and thus gives more accurate feed.

'It is a still further object of the invention to provide an improved throw-out for the operating shaft for the feed gripping means, so that the feed grip does not advance far enough to grip the work, to permit setting-up, adjusting, etc.

With the foregoing and other objects in view I have devised a construction illustrated in the ac companying drawings forming a part of this specification. It is, however, tobe understood,

that I am not limited to the exact construction and arrangement shown, but may employ various changes and modifications within the scope of the invention.

I. In these drawings: ';:Fig. 1 is a top plan view of the forming machine showing my improved feed device applied thereto; 1

:Fig. 2 is a front elevation of the feed slide and operating meanstherefor;

1 Fig. 3 is an end elevation of Fig. 2;

. Fig, 4 is a top plan view of the feed grip with parts broken away and the top guide for the movable jaw removed; a i

Fig. 5 is a transverse section thereof substantl l r on i e 5-5 of Fig. 4; a

looking from the left Fig. 6 is a detail end elevation of a portion of the crank drive and on an enlarged scale, the view being substantially on line 6-6 of Fig. 2;

Fig. 7 is a top plan view of the holding clamp and the operating means therefor;

Fig. 8 is a transverse section thereof substantially on line 88,of Fig. '7;

Fig. 9 is a section of the throw-out device substantially on line 99 of Fig. 8 and on a larger scale;

Fig. 10 is a section substantially on line lll--l0 of Fig. 9;

Fig. 11 is an end view of the eccentric of the throw-out; and

Fig. 12 is a section substantially on line I2|2 of Fig. 7.

Referring first to Fig. 1 the forming machine shown comprises a frame I in which the main drive shaft 2 is mounted and is operated by any suitable means, such as pulley 3, from any suitable source of power (not shown). 4 may be mounted on this shaft 2. A pinion 5 on the shaft 2 meshes with the gear 6 on the shaft 1 which through suitable beveled gears 8 and 9 drive longitudinal shafts I0 and H respectively. The shaft 10 through beveled gears I2 in turn drive a second transverse shaft I3. On the shaft 1 may be mounted a cam 14 operating suitable forming tool slide I5 through any suitable connection [6. On shaft I0 may be cams l1 and I8 operating other tools through connections l9 and 20 respectively. On shaft H may be a cam 2| operating another tool slide 22 through suitable connection 23 and on the shaft l3 may be a cam 24 operating slide 25 through connection 26. A cut off 21' for cutting the work may be provided, and operated by a lever connection 27a from a cam 21b on shaft ll. These slides and connections are not shown in detail as they may be used to operate any suitable forming tools for performing any suitable operations on the work and do not of themselves form any part of my present invention, this invention relating to the feed device for :feeding work to these tools.

The work to be fed to the tools to be operated on is shown as a wire 21, but the feed is equally adapted for othershapes of work, such for example as a flat strip or the like. The wire 21 is shown as being advanced from a suitable coil, not shown, through straightening rollers 28 and 29. The means for advancing the work and drawing it. through these straightening rollers comprises a feed grip on a feed" slide 3|] mounted on a suitable dovetail A fly wheel guide 3! on the frame of the machine. The slide is reciprocated back and forth on the guide by a link 32 connected to a feed rocker arm 33 and thus the movement of the feed slide 30;

and adjust the amount or length of wire or other a work which is fed forwardly on each forward movement of the feed slide 35; Theconnection 39 is shown as a headed stud M with its head 42 in a T slot 43 in the crank wheel 40, and an the jaw 38 to clamp the work against the jaw 54. Within the slide 10 is an adjustable rod M threaded to the slide 10 at 15, and it may be adjusted relative tothe slide 10 by rotating this rod by means of a screw driver or the like in the slot E6, and locked in adjusted position by a nut H. An operating lever 18 pivoted in the housing at 19 has one arm 80 engaging the end of the rod 14 and the end of the other arm iii in a groove 82 in the operating shaft Bil. Rotation of the shaft 65 in a clockwise direction as viewed in Fig. 8 will operate the lever I8 counterclockwise to move the jaw 68 tothe adjusting rod 43 threaded togthe stud' ll may .7

be rotated to adjust the stud and connection 39 along the slot 43 toward and from the axis of the; shaft 3 to thus varyv the length of movement of--.the feed slide, This rod 44 may be operated by any suitable means, such for exampleas a wrench in a non-circular socket 45 in the head lfi-secured to this rod.

.The feed grip carried by the slide 30 comprises a stationary jaw 4.1 and a movable jaw 48,,cooperating therewith to grip the work 21 between :.them. lThestationary jaw 41 is backed up by an adjusting screw 43 whereby the position-bf this jaw may be adjusted, and the jaw is held between portions 55 of the slide. The movable'jaw 58 is carried by a block 5| slidable in a guide 52 in the slide, and it is operatedito clamp, the work between the jaws t] and 48 by means of a toggle '53 operated by a lever 54. pivoted .in the slide 33 .by a shaft 55. The toggle link 53 is...connected with the lever 54 by a pivot rod 53 and with the block 5!. by a similar. rod 51. The lever, 54. has a laterally.

projecting arm 58 located with its. free end in.

a groove 53 extending longitudinally of an operating: shaft 63. This shaft. extends parallel to thepath, of movement of the feed slide and maybe mounted by any suitable means, suchas bearings 61,52 and 63Jcarried by the frame. The longitudinal groove 53, extendssubstantially thefulllength of the shaft, or that is, at least asi'far as the maximum throw or travelof the feedslide, so that thearm 53 is always .inthis groove in all positions of the feed slide, and

therefore the feed shaft is always in operative relation tothe toggle lever. In other words the feed ;grip is always in controlled relation with the. operating shaft, and, as will later be described, as the workholding clamp is also aljaw 581" arranged to' cooperate with the jaw 6" l to --clainp thefwork. -The jaw 58 is'pivoted attste a slide 15 which is reduced at H to pass through a collar "lz threaded in the housmg 33:" A;sprihg l3 embraces the reduced porti'on it a'nd tends-to adva'ricethe slide Ill-and V 'a' bloclt or' member 66 supported against the housing 61'; Within this housing is a movable left to release the work. Movement of the shaft 50 counterclockwise will permit the spring I3 to advance the jaw 68 to clamp the work.

The operating shaft 65 is operated or oscillated to operate the feed grip 48 and the clamp 68 by means of an internal cam 83 on the shaft II. This cam has a cam groove 84 in which runs a roller 85 mounted on one arm of a lever 85 pivotally mounted on a shaft 81. Connected with the other arm of the lever 86 is a link 88 pivoted at one end to the lever at 89 and at the other end pivoted to a crank 90 on the operating shaft 55. It will thus be seen that operation of the lever 86 by the cam 83 will operate the shaft 60.

The feed grip jaws and the clamp jaws are so part of this movement clamps the work by the clamp 68, and the latter part of the continued,

movement of the shaft releases the feed grip 48.

Thus thework isalways gripped by either the feed grip or the clamp so that it cannot shift; This in relation to the following operations. givesa more accurate feed (and also maintains a perfectly accurate feed) and it issecured by a, surplus of motion in the feed grip and clamp.. Thus, morespecifically, when the grooved oper-, ating shaft 68 is turned to the left or counterclockwise as viewed in Fig. 5 the first part of this motionv operating through the. lever 58 and tog-,

gle 53 clamps the feed grip 48 against the work and the later part of the continued movement of. this shaft releases the clamp 68. Continued movement after clamping of thefeed grip is permitted by the toggle connection 53, but of course the. actual movement required of the clampingv jaw is very small and isexaggerated on the draw-.

ings. On the reverse movement of this operating shaft 60 the operation is just the opposite. The. first part of this movement releases the lever 18'. to permit the spring 13to shift the .jaw .68 to? clamp the work, and the latter part of continued movement .of the shaft. 60 releases the feed grip 48.

In operation rotation of the crank 40, through the connecting link 31, oscillates theroick-er arm 33, and oscillation of this arm through thelink 32 reciprocates the feed slide 39 and the feed grip comprising the jaws 4l48, the toggle-53 and theoperating lever 54 carried by the slide. I As the free end of the arm 58 of this operating lever slides in the grooves '59 extending longitu dinally in the operating shaft'Bil throughoutthe l entire movement of the slide, this operating lever is in operative and controlled relation with the operating shaft in all positions of the slide.

The work holding clamp 68 is also operated by the operating shaft 60 through the operating lever 18 and its connection to the slide 10.

The operating shaft is operated from the shaft II by the cam 83 oscillating the lever 86 which is connected to the shaft 60 by the link 88 connected to the crank 90 on the shaft 60. Therefore the operating shaft 60 is oscillated by a single operative means and the oscillation of the shaft 60 operates both the feed grip 48 on the feed slide and also the work holding clamp 68, and therefore both the feed grip and the holding clamp are operated by a common operating means which is not affected by the operat ing means for the feed slide. Thus adjustment of this operating means does not change the timing of either the feed grip or the holding clamp relative to. each other.

I It will be seen from the foregoing description that as the feed grip and the work holding clamp are operated from the same operating means, that is the shaft 69, with which they are always in controlled or controlling relation in all positions of the feed slide and feed grip, the feed grip and the clamp are always in controlled or controlling relation with each other. It is therefore impossible to get the two out of proper relation to each other, and they are always in proper timed relation. Thus in adjusting the feed the clamp. automatically stays in time with the feed when the feed clamp or operating crank is ,adjusted. That is, when the feed grip is adjusted the clamp is automatically taken care of without further adjustment. This is not true where a feed is crank operated and the clamp is operated by a separate means. In such arrangements if an adjustment is made in the position of: the crank the timing automatically changes thereby throwing the timing of the clamp out of synchronism with the feed, thus necessitating a retiming of the clamp to synchronize with the feed. With the present arrangement where the crank operated feed and the clamp are operated by the same grip operating means, the clamp automatically stays in time with the feed when the feed operation is adjusted. I

The connection at 89 is a manually operable throwout connection which may be operated at will to make the connection from the cam to the shaft 60 ineffective. It is shown in detail in Figs, 9,510 and 11., Mounted in the forked end 86 of the lever 86 is a short shaft 9|, one portion of which 92 is enlarged'and has a groove 93 cooperating with the spring-pressed plunger 94 to retain the shaft in position, but permit it tobe rotated in the lever arm. Theend of this plunger is pressed into the groove by a spring 95, and the friction of the plunger in the groove retains the shaft in the position to which it may be turned by means of a hand lever: 96 on a collar 91 secured tothe shaft by a pin 98. The shaft includes an eccentric 99 which is embraced by :the head I00 of the link connection 88 and forms a pivotal connection between this linkand the lever 86. This eccentric is so arranged that when the, hand lever 96 is thrown to the position ojf Figs. 8, 9 and 10 the link connection88 is thrown forwardly. and operation of the lever 86 by the cam 83 will operate the feed grip 48 and clamp 88 in the manner as described. If, however, it should be desired to render the feed grip and clamp ineffective, such for example in setting up 3 require partial operation of the machine Without operation of the feed, all that is necessary is to swing the lever 96 to the left a half revolution to the dotted position in Fig. 8. This will swing the eccentric 99 through 180 and will shift the link connection 88 in a direction away from the operating shaft 68, and will rock this shaft to the right or clockwise as shown in Fig. 5 suinciently so that operation of this shaft by the cam 83 while the eccentric 99 is in this position will not advance the feed grip jaw 48 sufficiently'to grip the work and will not withdraw the clamping jaw 68sufficiently to release the work. This will permit operation of the machine to try out the tools, topermit the proper setting, and any other operations desired without operating the work feeding device. Merely throwing the hand 1ever96 back to the right to the full line position I of Fig. 8 (which is also the position of Figs. 9 l

and 10) will again render the feed and clamp release operative. These movements of the hand lever 96 and the eccentric 99 may be determined by' a suitable stop means. secured by extending the end ID] of the pin 98 beyond the collar 91 and providing stop shoulders I82 and I03 at suitable locations in the head 86 it forwardly, a clamp to grip the work on rethe machine, adjusting the tools, etc., which may 75 on opposite sides of the collar 91 which are engaged by this projecting end Hll to limit the turning movements of the levers 9B and the eccentric 99. buckle 88' for adjustment of the length of the link connection.

Suitable guides I94 for the workZ'l may be carried by the slide 30 to maintain the work in proper position with respect to the jaws 41 and Having thus set forth the nature of my invention, what I claim is:

1. In a feed for forming machines, a feed slide, means for reciprocating the slide, a feed grip on the slide for gripping the work to feed it forwardly, a clamp to grip the work on reverse movement of the feed grip, a common means for operating both the feed grip and the clamp, and means for, operating said common operating means in certain timed relation with operation of the slide. Y n 2. Ina feed of the character described, a feed slide, means for reciprocating the slide, an operating shaftparallel with the path of fmovemerit of the slide, a feed grip on the slide to grip the work to feed it forwardly, a clamp to grip the work on reverse movement of the feed grip, operating connections from the operating shaft to the feed grip and to the clamp constantly in controlled relation with the shaft, and means for oscillating the shaft in certain timed relation with operation of the slide to operate both the feed grip and the clamp. I

3. In a feed of the character described, a feed slide,-means for reciprocating the slide, a feed grip on the slide for gripping the work to feed verse movement of the feedgrip, a common operating means for both the feed grip and the clamp, operating connections from the common operating means to the feed grip and to the clamp constantly in controlled relation with the said operating means, and means for operating the common operating means in certain timed relation with the operation of the slide.

4. In a feed of the character described, a feed A convenient stop is l The link 88 may include a turn slide, means for reciprocating the slide, an operating shaft parallel With the path of movement of the slide, a feed grip on the slide to feed the work forwardly including a movable jaw, a laterally extending arm on the slide for operating the jaw, said shaft having a groove therein to receive the end of the arm for operating it and extending for the full movement of the slide, a clamp to grip the work on reverse movement of the slide, an operative connection from the shaft to said clamp, and means for operating the shaft in certain timed relation with operation of the slide.

5. In a feed of the character described, a feed slidemeans for reciprocating the slide, an operating shaft parallel with the path of movement of the slide, a feed grip on the slide to feed the workforwardly, means on the slide for operating the grip andhaving sliding engagement with the shaft so constructed that the shaft may operate the gripin all positions of the slide, a clamp to. grip the work onreverse movement of the slide, an operative connection from the shaft'to the clamp, and means for operating the shaft.

6. In a feed of the character described, a feed slide, means for reciprocating the slide, an operthe lever to the jaw, said shaft having a longitudinal groove into which an arm of the lever projects for sliding connection with the shaft, said groove being of a length to give operative connection between the shaft and lever in all positions of the slide, a clamp to grip the work on reverse movement of the slide, an operative connection from the shaft to said clamp, and means for operating the shaft.

'7. In a feed of the character described, a feed slide, means for reciprocating the slide; an operating shaft parallel with'the path of movement of the slide, a feed grip on the slide to grip the work to feed it forwardly, a. clamp to grip the Workon reverse movement of, the feed grip, an operative connection from the shaft to the feed grip in controlled relation with the shaft in all positions of the slide, an operative connection from the shaft to the clamp, cam means, and means operated by the cam means for oscillating the shaft to operate both the feed grip and the clamp.

8. In a feed of the character described, a feed slide, means for reciprocating the slide including a crank, means for adjusting the length of the crank; an oscillatable o'peratingshaft parallel to the path of movement of the slide; a feed grip on the slide to feed the work forwardly, a clamp to from the shaft to the feed grip in controlled relation to the shaft in all positions of the slide,

'10. In a feed of the character described, a reciprocable slide, means for reciprocating the slide, a feed grip on'the slide to advance the work, a clamp to hold the work on reverse movement of the slide, an operating shaft, operative connections from the shaft to the feed grip and clamp, means for operating the shaft, a crank and a link connection from an operating means tothe shaft, the connection from the operating means including an eccentric, and manually operated means for shifting the eccentric to a position that when operated it will not operate the shaft to a position to et thefeed grip and clamp. 11. In a feed of the character described, a feed slide having a feed grip, a clamp, means for operating the slide to advance the work, an operating shaft, operative connections from the shaft to the feed grip and the clamp, an operating means, a connection from the operating means to the shaft including an eccentric, turnable from its normal operative position to another position to render the shaft ineffective to set the feed grip and clamp, and manual means for turning the eccentric.

12. In a device of the character described, means for gripping the work, an operating means, an operative connection from the oper ating means to the gripping means including an eccentric turnable to two positions in' one of which it is effective to operate the gripping means and in the other of which it is ineffective to operate said means, and manual means for turning the eccentric from one position to the other to render the connection effective and in-' effective to operate the gripping means.

13. In a device a of the character described,-

means' for gripping the work, means for operating the gripping means including a lever, means for operating the lever, an operative connection from the lever to the gripping means including a link, means pivotally co nnecting the link to the lever'including a shaft having an eccentric,

manually operable means to turn the shaft to shift thee'ccentric to' render it ineffective to set the gripping means, and means to hold the eccentric shaft in different angular positions. 1

14. In a device of the character described, means for gripping the work, an operating means, an'operative connection from the operating means to thegripping means including a' shaft-having an eccentric forming a pivotal connection between parts of said operative connec-' tion, a manually operable means on said shaft-to turn the shaft to shift the eccentric to and from a'position where it is effective to set said gripping means, means to yieldingly hold the eccenf trio shaft in different adjusted positions, and

LESLIE w. BARNES. f

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