US1697947A - Bending machine - Google Patents

Description

Jams, 1929. 1,697,947

H. H. BUNKER BENDING MACHINE Filed Oct. 5. 1921 Patented Jan. 8, 1929.

UNITE FIC-E.'

HERBERT H. BUNKER, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO -KERLOW STEEL FLOORING CO., OF JERSEY CITY, NEVI JERSEY, A CORPORATION OFVNEW JERSEY.

BENDING MACHINE.

Application sied october 5, i921.

My invention relates to machines for bending work strips intothe form desired. An object of the present invention is to provide a device of the above class which shall be simple in construction, easy to manipulate with increased speed and accuracy, capable of wide use to form different shapes desired, and adapted to have a longer life by beingl provided with means to adjust or renew the l0 parts thereof most subject to wear. Another object of my invention is to provide an iinproved method of forming the spacing members, suchv as are used in floor gratings or ventilators.

To these and other ends my invention consists in certain improvements and combination of parts as will be pointed out in greater particularity in the claims appended to the specification.

In the drawings, Figure 1 is a side view of one embodiment of myinvention aft-er the work has been bent.

Fig. 2 is a view on the line 2&--2 of Fig.

l from beneath and looking upward toward the holder 10. 1

Fig. 3 is a section on the line 31--3a of Fig. 1.

Fig. 4 shows a. modified form of die seat.

In many of the commercial die presses used for bending a strip of substantially straight stock material to the desired shape, it has been customary where speed of operation is desired to mount the dies or parts effective to do the bending in heavy blocks or castings which provide cooperating surfaces pressing on -both sides of the work througl'iout the entire length thereof between the portions bent. My invention does not require such heavy operating parts, is adapted to compensate for wear, and possesses the additional advantage of being adjustable to fdrm the work into diiferent shapes as may be desired.

-Referring to the drawings, the numerals 10 .and 11 indicate respectively upper and lower holding members ory supports for the l dies 13 and 14 which are quickly movable toward one another to bend the work piece 12. As illustrating a simple means for securing the dies 13 and 14 to their respective holding members, each of the holding members may be provided therein with one or more longitudinally extending slots 18 through which freely project the bolts or screws 19 for clamping the dies in position.

Serial No. 505,559.

These bolts may be provided withV an 'enl them in position against their holders.` As Y an additional .means for retaining the ldie members in operative position the bracing l lyokes 15 are arrangedto tightly engage the sides of the die to prevent longitudinal movement thereof, and are shown as being held in place by the bolts or screws 16 engaging slots 17 disposed on oppositesides of the holding members 10 and 11 in order to be adjusted longitudinally. For convenience in rapidly and accurately adjusting l one or more of the dies longitudinally and varying their spacing, graduations 2() and 21l may be applied to the holders 10 and 11, respectively, and both the oke members 15 and the dies may be provided with guide means 27 or a line etched or otherwise formed on the sides of the dies and yoke members to cooperate with the graduations 20 and 21, and to also assist the operator inproperly position-v ing the work strip 12. It maybe sometimes desirable to punch the necessary bolt or rivet holes in the work at the same time and in the V same operation that the bending is done, in which case punches 22 may be secured by threads or other suitable'meansto the dies 13 or to theirseats. j Instead of 'doing the bending and punching in the same operation, the bending may be performed say in the front and the punching in the rear portion as is possible when the punches 22 are disposed in the hole 23 towards the back.` Still anpunching operations is to have ythe bending done first and then the punching accomplished by a secondary or independent movement of the punch or punches 22 relative to the holding members and work. For convenience in working upon a plurality of strips 12 at the same time or whenit is desired to bend the strip 12 in the front or back of the press when relatively wide or deep Vdies are used, the punch 22 may be made adoo otherV way `for combining the bending and sired shape as far as possible, and for this purpose a finishing die is provided on one of the holders and is shown as being longitudinally adjustable in the samel manner as the bracing yokes 15. By loosening the finishing die 25 and reversing its position, it will be seen that this die is also adapted to be used on the other side of the central die 14 when desired.l

Instead of the die seat 13n being substantially flat, the modified form of seat 13b shown in Figure 4 may bc used and the same made integral with the holders 10 and 11 as is the seat 132er this seat 13b may be made l longitudinally adjustable ifcdesired.

In operationv the workman takes the substantially straight work strip 12 and being guided by the lines 27 may accurately position the work relative to the dies. The holdingjmembers 10 vand 11 are then moved toward one another by pneumatic or other quick operating means. In the bending operation the punches 22 may or may not be pres ent according to whether or not it is desired to have this operationperformed at the same time the bending is done. The edges 26 of the dies are subject to the most wear and in order that the life of the dies may be prolonged, each may be made adjustable or reversible to expose otheredges in bending. In the embodiment shown the portion of the workf12 intermediate the bending edges of adjacent sides is substantially straight by reason of the pulling action exerted in opposite directions by the dies.` When a Clifforent contour isdesired for the finished work, one or more of the diesinay be adjusted longitudinally by loosening the screw 19 andthe bracing yokes 15 to vary the spacing between the dies. When it is desired to raise or lower the dies 13 and 14 without changing their relative spacing, it is possible to add or take away shims which may be inserted between the dies 13 and` 14 and their respective holders longed life is another feature of my bending machine. l/Vhile possessing the foregoing advantages my machine is likewise adapted to greater usefulness by being adjustable through having the dies adjustable. both longitudinally and by means of shims to obtain different forms for the finished work. lhen Vthe relatively movable holding members 10 and 11 provide seats ory abutments against which the work may be pressed by the dies, a rigid and effective construction results. j The use of the guide means or lines 27 for centerwhich are shorter than the usual length orthe end port-ions of a strip. The bracing yoke 15 contributes rigidity to the construction whereby there is less likelihood of the Vdies 13 and 14 becoming displaced longitudinally. Having the punch 22 adjustable transversely of the die as shown enables a new portion of the same bending edge of the die to be used when only a part thereof has become worn in using a relatively narrow work strip. In ad# dition to the increased speed of operation and facility of adjustment, my machine is ar ranged so vthat-the operator may when standing upon either side of the machine see the ent-ire length of one side of the work piecek contained in the machine, that is, there are no supporting columns or bars to obstruct Vthe View of any part of the work.

Inasmuch as the dies are high and the metal contained within theV machine' after y of bending machine over those using solidV dies or those in which the dies cooperate with the work throughout its entire length con-U tained in the machine, resides inthe reduc-y tion of friction. It has been discovered that the work travels or flows inward and toward the center from both ends of the machine, as the dies move together. The portions of the work between adjacent dies is unsupported and out of contactv with any dies. In the Vsocalled solid form of dies the portions of the work which in the present invention are held unsupported are caused to slide over the surfacerof the solid dies, resulting in the increased friction and in additional power bcing necessary to operate such forms as compared with that necessary in the present in vention. It has also been noticed that the sharp corners or bends are formed onl yin the latter part of the operation. V

I claim: y 1. In a bending machine in combination with a pair of movable dies and a holder therefor, another die and holder therefor, the second holder having a plurality of seats for cooperationwith the dies of thc first hold er, and a punch located between one die and its seat adapted to perform the work during the bending operation, said punch being adjustable transversely of said die.

2. In a bending machine, a pair of die Vsupports adapted to be moved toward and away from each other, portion, of one of said supports being adapted to function as v rio a single die-seat whereas spaced portions of the other of said supports are 'adapted to function as a pair of die-seats, a pair ofspacedv vdies carried by one of said supports at opof said supports, a single die carried `by the other of said supports intermediate said pair of die-seats, said single die being adapted to move into-thel space afforded between said pair of dies and having a. work face conforming to and adapted to co-operate with said single die-seat upon'relative movement of said supports; and means detachably securing said dies to their supports.

3. In a bending machine, a pair of die supports adapted to be moved toward and away from each other, a portion of one of said supports being adapted to function asa single die-seat whereas spaced portions of the other of said supports are adapted to function as a pair of die seats, a pair of spaced dies carried by one of said supports at opposite ends of said single die-seat and adapted to cooperate with said pair of die seats of the other of said supports, a single die carried by the other. of

said supports intermediate said pair of die` seats, said single die' being adapted to move into the space afforded between said pair of dies and cooperate with said single die-seat upon relative movement of said supports and means for facilitating adjustment of one of said dies with respect to the remainder of said dies and longitudinally with respect toits support. n f

4. In a bending machine, a pair of die supports adapted to be moved toward and away from each other, a portion of one of said supports being adapted to function as a single die-seat whereas spaced portions of the other of said supports are adapted to function as a pair of die seats, a pair of spaced dies carried by one of said supports at opposite `ends of said single die-seat ano adapted to cooperate with said pair of die-seats of the other of said supports, a single die carried by the other of said supports intermediate said pair of die seats, said single die being adapted to move into the space afforded between said pair of dies and cooperate with said single die-seat upon relative movement of said supports and means for facilitating adjustment ofsaid pair of dies with respect to said single die and longitudinally of said supports.

5. in a bending machine, a pair of die supports adapted to be moved toward and away from each other, a portion of one of said supf ports being adapted to function as a single die-seat whereas spaced portions of the other of said supports are adapted to function as a pair of die-seats, a pair of spaced dies carried by one of said supports at opposite ends of said single die-seat and adapted to co-operate with said pair of`die-scats of the'other other .of said supports intermediate said pair of dieeseats, saidr single die being adapted to move into the space afforded between said pair of dies and cooperate with said single die-seat upon relative movement of saidsupports, and means for facilitating Aadjustment of said single die with respectj'to said pairof dies and longitudinally of'said supports. `i

6. In 'a bending machine, a pair of die sup ports adapted to be moved toward and away from each other, a portion of one of said supports being adapted to function'as a single die-seat whereas spa-ced portions of the other of said supports are adapted to function as a pair of die-seats, a'pair of spaced dies carried by one of said supports at opposite ends of said single die-seat and adapted to cooperate with said pair of die-seats ofthe other of said supports, a singledie carried bythe other of said supports intermediate said pair of dieseats, said single die being adapted to move into the space afforded between said pair of dies and co-operate with saidsingle die-seat upon relative movement of said supports, and a finishing die carried by one of said supports intermediate said pair of dies and adjacent said single die-seat,fsaid finishing die being disposedout of the path of relative movement between said single die and single dieseat and adapted to rco-operate withvsaid' single die.

7. In a bending machine, a pair of die supports adapted to be moved toward and awayV from each other, a portion of one of said supi ports being adapted to function as a single die-seat whereas spaced portions of the other of said .support-s are adapted to function as a pair of die-seats, a pair of spaced dies carried by one of said supports at opposite ends of said single die-seat and adapted to co-operate vwith said pair of die-seats of the other of said supports, a. single die carried by the other of said supports intermediate said'p'air of dieseats, said single die being adapted to move into thek space adorded between said pair of dies and co-operate with said single die-seat upon relative movement of said supports, a finishing die carried by one of said supports intermediate said pair of dies and adjacent said single die-seat, said finishing die being disposed out of the path of relative movement between said single die and single die-seat and adapted to co-operate with said singlel die,

and means for facilitating adjustment of said finishing die with respect to said pair of dies longitudinally of said die supports.

8.' In a bending machine,I aV pair of die' supports adapted to be moved toward and away from each other,a portion of one ofsaid supports being adapted to function as a "single die-seat whereas spaced portions of the' other of said supports are adapted to function as a pair of die-seats, a pair of spaced dies carried by one of said supports at opposite ends of of said supports, a single die carried by the said single die-seat and adapted to (3o-operate with vsaid pair of die-seats of the other of said supports, a single die carried by the other of' Vsaid supports intermediate said pair of dieseats-said single die being adapted to move into the space afforded between said pair of dies and cooperate with said single die-seat uponA relative movement ofsaid supports and i a plurality of punches adapted to perforate the work during thebending operation said Vpunches being adjustable transversely of said die supports. 9. ln a bending'macliine, a pair-of die `supports adapted to be moved toward and a 'ay' from each other, a portion of one of said sup-4 {ports being-adapted to function as a single die-seat whereas spaced portions of the other spective supports and with respect to each,4

of saidsupports are adapted to function a pair of die-seats, a pair of spaced dies carried byone of said supports at opposite ends of said single die-seat and adapted to co-operate with said paii of die-seats of the other of `said supports, a. Single die carried by the othei of said supports intermediate said pair of diefseats, said single die being` adapted to move into the space afforded between said pair of dies and co-operate with said singledie-seat upon relative movement of said supports, and means for visibly indicating the posit-ion of said Vdies with respect to their reother. n n

10,5 A bending machine comprising relatively movable support-ing members having die seats and adapted to carrydie members between which the work to be operated upon is inserted, a pair of spaced dies carried by one of said supporting members and an intermediate cooperative die carried by the other of said members and adapted to enter the space afforded between the pair of dies, said dies being in the form of blocks provided with bending edges and clamping faces, the

' bending edges being adapted to function collectively to effect a bending of the work inter-` mediate the dies upon a predetermined relative movement of said supporting members e whereas upon furtherinovement said clamping faces and die-seats are adapted to function co-operatively to effect a clamping action upon the portion of the work lying therebetween, and means permitting longitudinaladjustment of said intermediate die with respect to support for varying its position with respect to said spaced dies whereby the sections of work betweenV said intermediate die and spaced dies may be bent at different angles with respect to each other. i t

Y 1l. A bending machine comprising relatively movable supporting members having die-seats and adapted to carry die members `between which the'work to vbe operated upon is inserted, a pair of spaced diesy carried by one of said supporting members and an inter mediate co-operative die carried by the other f said members .andadapted-to enter the spaceafforded between the pair of dies, said Adies beingrin the form of blocks provided with bending edges and clamping faces, t-he bending edges being adapted to function collectively lto effect a bending of the work intermediate tlie dies upon a predetermined relative movement of said supporting members whereas upon Vfurther movement said clamping facesand die seats are adapted to function cofoperatively to eEect a clamping action Y upon the portion ofthe work lying therebetween, and means permitting adjustment of said intermediate die whereby the saine may be positioned closer to one of said spaced dies spaceafforded between the lpair of dies, all of l said dies being in the foi'in of independently supported Ylongitudinally adjustable blocks provided with bending edges and clamping faces, the bending edges being adaptedy to functioncollectively to effect a bending of the work intermediate the dies upon apredetermined relative movementof said supporting members whereas upon further movement. said clampingfaces and die-seats are adapted to function co-operatively to effect a clamping action upon the portion of. the work lying therebetween.

13. In a bending machine, a Apair of die `supportsadapted 'to be moved toward and away from each other, one of said die supports being provided with an intermediate rflat die-seat whereas the other of said sup. ports is provided with a pair of spaced flat die-seats, a pair of spaced dies carried by one of said supports at opposite ends of said intermediate die-seats and having fiat work faces conforming to and adapted to co-opera-te with said pair of die-seats, and an intermediate 'die provded withv a flat work face conforming to and adapted to lco-operate with said interi'nediate die-seat, said inter-` mediate die being carried by thefsupport provided with said pair of die-seatsand adapted to move into thespace afforded between said pair of dies uponrelative movement of said supports. 1

14C. In a bendingmachine, a pairof die supports adapted to be moved relatively toward and away from each other and to receive therebetween a. work piece to be bent, one of said supportsbeing provided with an .Learner intermediate flatV die-seat whereas lthe other of saidsupports is provided with a pair, ofY

flat die-seats, a pair of spaced dies carried i by one of said supports at oppositeends of said intermediate die-seat and having fiat work faces conforming to and adapted to cooperate with said pair of die-seats and an intermediate die provided with a flat work face conforming to and adapted to co-opera-te with said intermediate die-seat, said intermediate die being carried by the support provided with said pair of die-seats and adapted to move into the space afforded between said pair of `dies upon relative movement of said said supports is provided with a pairof` spaced diie-seats, a pair of spaced dies carried by `one of said supports at opposite ends of said intermediate die-seat and having work faces conforming to and ,adapted to co`operate with said pair of die-seats and an intermediate die provided with a work face conforming to and adapted to co-operate with said intermediate die-seat, said intermediate die being carried by the support prof vided with said pair of die-seats and adapted to move into the space aifordedbetween said pair of dies upon relative movement of said supports, all of said dies being so shaped that of supports, one movable toward and from the other, dies carried by one support and spaced apart thereon, a die carried by the other support, the space between the dies on the first support providing seats for the die on the other support, and means detachably securing the dies to their supports.

17. A* bending machine comprising a pair of supports, one movable toward and from the other, dies carried by one support and spaced apart thereon, a die carried by the other support, the space between the dies on the first support providing seats for the die on the other support, means detachably securing the dies to their supports, and means to adjust said dies on their supports and toward and from one another.

18. A bending machine comprising a. pair n of supports, one movable toward and from the other, dies carried by one support and spaced apart thereon, a die carried by the other support, the space between the dies on the first support providing seats for the die veach punch on its on the other support, and means detachably securing the dies to their supports, said means passing through lslots insaid supe ports and engaging said dies-to adjustabiy `secure them in position.Y y L 19, A bending machine comprising a pair of supports, vone movable toward and from the other, dies carried by one support and spaced apartthereon, a die carried by the other support, the space between the dies on the iii-st support providingseats for the die on theother support, and means detachably securing a die to its support,said means comprising al screw passing through a lslot in thesupport and threaded into the die, whereby tightening of the screw will secure the die in position and loosening thereof willA permit adjustment thereofonthe support. l

20. A. bending machine comprising a dieV support having a slot therein, a die, ascrew f passing through said slot and threaded into said die whereby tightening of said screw #will secure said 'die'in position and loosening thereof will lpermit adjustment of saidV die on said support, a yoke engaging said die, and means to secure said yoke to said support.` i

21'. A bendingmachinecomprising a die`Y support having a slot therein, a die, a screw passing through said slot and threaded into said die whereby tighteningcof said screw will secure said die in position and loosening thereof will permit adjustment of said die on said support, a yoke engaging said die, and means to secure said yoke to said support, said securing means comprising bolts carried by said yoke and received in a slot in said support whereby said yoke may move with said die.

' 22. A bending machine comprising a pair o-f supports, onemovable toward and from the other, dies carried by one support andn los spaced apart thereon, a die carried by the other support, the' space between the dies on the rst support providing seats for the die on the other support, means detachably securing the dies to their supports, and a punch carried by each die.

' .23. A bending machine comprising a pair of supports, onemovable toward and fromv the other, dies carried by one support and spaced apart thereon, a die carried by the other support, the space between the dies on the first support providing seats for the die on the othersupport, means detachably securing the dies to their supports, a punch carried by each die, and means for adjusting y die. l

24:. lThe method of bending a bar which comprises placing said bar with one side upon the face of a die and bringing a pair of dies into contact with the opposite side of said bar at points spaced from said first named die and on opposite sides thereof and against die seats, whereby the bar will be made'svubstantially straight between the edges ofsaid'dies.l Y

; `The method of bending a bar.V which lcomprises placing said bar with one side uponthe face of a die, bringing a pair-Jofdiesuintocontact with'the opposite side oi' saidbar at points spaced from said first named Vdie and on opposite sides thereof and bringing the faces-.of said dies against die seats, whereby'ithe bar will be made substan-k tially straight between the edges Vofsaid dies, and forcing the bar against the faces or' said dies; r` f I 26. A-bending machine comprising a die support, a die slidably mounted on the support,means for retaining saiddie in position including va yoke-like member extending acrossthe-v*die-supporting surface of the support tn lieinclose juxtaposition against a sideface of the die and having its ends extending over the edges of said support, means for securing the ends of said yoke to said support whereby the sliding' movement of the die isprevented in one direction, and means 'aol " on thesupport withwhich said yoke-securing port, meansior `securing the deto the supp# p ort including a yoke-like member extending across the die-'supporting face ofV said support and havingits endsextending around the sides of said support, said yoke member l having a slot therein through which said Vdie may extend and engage`r the side walls of the slot, and means for securing the ends of the yoke to said support, whereby vthe 'slidable movement of the die on the support is pre vented.

28. A bending machine comprisingl a die support, a die slidably mounted on the support, means for securing the die to the support-including a yoke-like member extending across the die-supporting face of said sup-v port and having its ends extending around" the sides ofsaid support, said yokemember having a slot therein through which said die may extend and engage the side walls of the slot, means for securing the ends'of the yoke' to said support, whereb7 the sli'dable movesv ment of the die on the supportis` prevented, said support havinga groove therein with which said securing means engages, where-b)7 the yoke may be prevented from fdisengaging f the supportY when the securing means isloosened for adjusting the yoke. I

In testimony whereof, I have affixed my signature to this specification.

HERBERT H. BUNKER.v

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