US3107006A - Drawbench - Google Patents

Description

Oct. 15, 1963 R. J. MYOTTE 3,107,006

DRAWBENCH Filed Dec. 2'?, 1961 6 Sheets-Sheet l FIG. 2

I ROBERT MYOTTE C- 15, 1963 R. J. MYoTTE 3,107,006

DRAWBENCH Filed Dec. 27, 1961 6 Shee'bS-Sheet 2 FIGB NV EN TOR.

la I8 ROBERT J. MYoTTE Fl G. 5 By ATTORNEYS OC- 15, 1963 R. J. MYOTTE 3,107,006

DRAWBENCH Filed Deo. 27, 1961 6 Sheets-Sheet 5 FIG. 6

"mh" sl:

F168 ISM-JL A ORNEYS INVEN TOR. ROBERT J. MYoTTE Oct. 15, 1963 R. J. MYOTTE 3,107,006

DRAWBENCH Filed Deo. 27, 1961 6 sneetsu-sheet 4 FIG. 9

POSITION A PosmoN B FIG. IO

los 82 INVEN TOR. ROBERT J. MYOTTE 0m M fhck WAORNEYS R. J. MYOTTE Oct. l5, 1963 DRAWBENCH PosmoNB Z54 IIB fol t 6 Shee's-Sheet 5 Filed Dec. 27. 1961 Posmou A FIG. I3

INVENTOR. ROBERT J. MYOTTE Oct. 15, 1963 R, J, MYOTTE 3,107,006

DRAWBENCH Filed Dec. 27, 1961 e sheets-sheet e FIG. I4

TTORNEYS United States Patent OT 3,107,006 DRAWRENCH Robert 3. P/lyotte, 19431 Grmiston Ave., Enciid, Ohio Filed Dee. 27, 1961, Ser. No. 162,448 19 Claims. tCi. 2957-3) This invention broadly relates to the drawbench art, and more particularly to means for intercepting workstock after it has been released from the drawbench die stand, and carriage, respectively. This application is a continuation-in-part of my co-pending application entitled Drawbench, Serial No. 803,295, led March 31, 1959, now Patent No. 3,029,930.

When drawing tubing, wire, or rod which is long in proportion to its diameter, energy is accumulated and stored in the workstock. This energy is expended thereafter when the Workstock is released from the die stand by causing the workstock to snap forward much -in the nature of an extended rubber band which is iirst released at one end only. 'Ihe result is often times a sudden shock to the workstock by virtue of collision with the die stand or cam'age, resulting in kinking or bending, sometimes referred to as doglegging I am familiar with eiforts in the past to solve this problem by use of carriage shock absorbers, deiiecting plates, channels and the like. However, I believe my invention to be a departure from prior teaching, and that I am the first to utilize principles of energy dissipation different from those presently known and used in the prior art. My invention contemplates the use of a plurality of energy dissipating V-shaped crotches which will intercept the workstock once it has been released from the die stand. These crotches may be advantageously lined with a material having a high coeicient of friction relative to the workstock, whereupon forward movement of the workstock 4is arrested almost instantly. I consider my concept of V-shaped energy dissipating crotches to be novel, as well as the various expedients which I utilize in accomplishing the broad concept of my invention.

-It is therefore among the objects of my invention to provide novel workstock energy dissipating mechanisms for use in association with drawbenches; to provide socalled anti-recoil workstock intercepting mechanisms to receive stock after it has been released from its die stand and carriage, respectively, and which will arrest forward movement of the stock almost instantaneously; to provide an energy dissipating mechanism for drawbench workstock by means which are simple, yet reliable; to provide means for intercepting and dissipating the energy of workstock released from a drawbench before any doglegging can occur to the leading end of the workstock; and to provide an anti-recoil mechanism which may be used in association with, or which is readily adaptable for use with most, if not all, presently known designs of drawbenches.

The features of this invention which are believed to be novel are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and use, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings in which:

FIGURE 1 is an elevational View, with parts in section, of a conventional drawbench having in association therewith one preferred embodiment of the invention;

IFIGURE 2 is an enlarged cross-sectional view taken on the line 2 2 of FIGURE 1;

FIGURE 3 is a cross-sectional elevation of a conventional drawbench, such as shown in FIGURE 1, showing another embodiment of the invention;

Patented Got. 1.5, 1963 FIGURE 4 is a fragmentary side elevational View taken on line 4-4 of FIGURE 3.

FIGURE v5 is a cross-sectional elevation of a conventional drawbench, such as shown in FIGURE 1, showing yet another embodiment of the invention in operative position;

FIGURE 6 is a cross-sectional elevation of the conventional drawbench of FIGURE 5, showing the embodiment of the invention of FIGURE 5 in the inoperative or workstock discharge position;

yFIGURE 7 is a fragmentary perspective view of the embodiment of the invention shown in FIGURE 5 in coacting relationship with workstock in the process of being drawn;

FIGURE 7A is a front elevational View of a modified embodiment of the invention shown in FIGURES 5, 6 and 7.

FIGURE 8 is a fragmentary elevational view of the embodiment of the invention shown in FIGURES 5, 6 and 7, illustrating the coacting lrelationship with a drawbench carriage.

FIGURE 9 is a cross-sectional elevational view of a conventional drawbench, such as shown in FIGURE 1, showing still yet another embodiment of the invention in operative position;

IFIGURE 10 is a fragmentary plan view of still another embodiment of the invention;

FIGURE 11 is a fragmentary side elevational view of the embodiment of the invention shown in FIGURE 10;

FIGURE 12 is a sectional View taken on the line 12 12 of FIGURE 11;

FIGURE 13 is a fragmentary sectional view of FIG- URE 12 showing the anti-recoil device in a discharge position.

FIGURE 14 is a, fragmentary schematic representation of the drawbench carriage and limit switches actuated thereby;

FIGURE 15 is a schematic wiring diagram of the electrical circuitry employed in association with the embodiments Vof the invention shown in FIGURES 1 through 9;

FIGURE 16 is a fragmentary schematic representation of the pneumatic system employed in the embodiments of the invention shown in FIGURES 10 through 13; and

FIGURE 17 is `a schematic wiring diagram of the electrical circuitry employed in association with the embodiments of the invention shown in FIGURES 10 through 13.

Reference will now be made to the drawings in greater detail, and at the outset to FIGURES 1 and 2.

A conventional drawbench 16 includes a structural frame having .uprights 12, longitudinal structural members 14, cross members 16, and track members 18 and 19. Pairs of sprockets 20 and 21 are journaled on opposite ends of the drawbench and are transversely spaced apart to carry a pair of horizontally spaced longitudinally rotating chains 22. A bull gear 24 is mounted on a drive shaft 26, as are transversely spaced sprockets 21,V and a pinion 28 is drivingly connected to bull gear 24 and powered by drive means 3i). A die stand 32 is mounted at one end of the drawbench 19, and a carriage 34 adjacent thereto is adapted to run on tracks 19 from left to right, as viewed in FIGURE 1, until workstock W is fully drawn through the .die stand. Drive means 3G is then reversed and the carriage is returned to its initial position adjacent die stand 32.

As the carriage 34 reaches the end of its traverse to the right of drawbench 10, the carriage workstock gripping means releases the leading ends of the workstock by means responsive to release of the trailing ends of the workstock from the die stand 32. Means for gripping and releasing workstock associated with the die stand 32 and carriage I34 are well understood by those skilled in the art and do not therefore constitute a portion of this invention. However, as aforesaid, the sudden release of tension in drawn workstock oftentimes results in whiplashing of the stock resulting in spoiled stock and darnaged equipment. To alleviate this condition, anti-recoil means 40 are mounted at intervals beneath the track members 19 to projectupwardly through openings 41 in inclined table 42, also positioned beneath track members 19.

One preferred embodiment 'of the invention is best shown in FIGURE 2 and comprises a supporting `arm 5G pivotally mounted on -a lug member 52 secured to the underside of an inclined table 42. A plurality of V- crotch stock intercepting members 54 are `fastened to the top side of supporting arm 50 and are positioned to be directly beneath workstock W being drawn by the carriage 34 mounted on the tracks 19. A fluid motor 56 is pivotally anchored to a base lug S8 secured to structural member 14 of frame 10, and the piston rod 60 of the motor is pivotally secured to the underside of supporting arm 50 by means of lug member 62 integral with the supporting Workstock guide members 64, made of resilient, yieldable material are secured to opposite sides of the open ends of the V-crotch stock intercepting members 54. These guide members y64 project upwardly through opening 41 of inclined table 42 to straddle respective workstock members W.v So positioned, the guide members are in -the path `of the carriage 34, but being ilexibly resilient are deflected downwardly by the traverse of the carriage V34, best shown in FIGURE 8, as `the carriage passes immediately overhead. As soon as released by the downward pressure of the carriage 34, the guide members 64 spring back to their upright position to again straddle the workstock W, thereby continuing to serve as `guides into the V-crotch stock intercepting means 54.

When the carriage 34 reaches the end of its run, the trailing end of the workstock Aleaves the die stand 32 and in so doing actuates the jaws of the carriage 3'4 to release the leading ends of the workstock W. Because of the close proximity of the V-crotch means to the plane of travel of the workstock W, each workstock member is securely lodged in its respective V-crotch intercepting means before the Iworkstock can move forward any appreciable amount responsive to the release of energy suddenly expended when the trailing end 'of the stock leaves the die stand.

As best shown in FIGURE 7, the inner surfaces of the V-crotch shaped intercepting members may be lined with substance 66 having a lhigh co-efcient of friction Vrelative to the workstock W. These crotches S4 assisted by surface substance 66, act to retard forward movement of the stock yalmost immediately, thereby preventing any collision of the leading end of the stock with either the carriage or the die stand. In general, vulcanized rubber cemented to the V-crotches 54 has been found very effective in arresting forward movement of the stock once it is free from the die stand and the carriage, although the invention is not limited to any particular lining.

Once vthe workstock is gripped or wedged in the apex ofthe crotches of the V-shaped intercepting members 54, uid motor 56 (FIGURE 2) is energized to retract piston rod 60 within the cylinder portion of the motor to pivot supporting arm 50 downwardly in a transverse and clockwise direction, as shown in phantom in FIGURE 2, whereupon the workstock Wis transferred to the -top surface of inclined table 42. Thereafter the workstock is free to roll by force of `gravity to one side of the drawbench.

In -another embodiment of the invention, see FIGURES 3 and 4, the V-crotch intercepting members 54 are supported on an upstanding carrier bracket 68 pivotally secured by -pins 69 to a supporting bracket 70 mounted on longitudinal members 14 of the yframe 10. A fluid motor 72 pivots the carrier bracket 63 longitudinally with respect to the drawbench, as opposed to the transverse pivotal 4 movement of the Iarm 50 of the embodiment illustrated in FIGURE 2. In conjunction with this second embodiment of the invention, longitudinal slots 74 are provided in the table 42 Iso as to enable the V-crotch intercepting members to clear the surface of the table.

Although less clearance space is required in the table 42 to provide movement of the V-crotch members in the embodiment of FIGURE 2, there is an advantage in the arrangement shown in FIGURES 3 and 4 by virtue of the fact that certain compensating positioning of the stock is provided for by longitudinal arcuate movement of the V-crotch members. Otherwise stated, due to the momentum of the forward motion of the stock as it leaves the die, the stock will continue to travel forwardly a distance before being intercepted, depending, of course, on the length `of the stock, its initial speed, its mass, and other considerations. 'I'his forward motion may, in certain circumstances, be sufficient to project the forward end of the stock into position which would present problems of interference in getting the `stock to roll to one side of the drawbench. With the embodiment shown in FIGURES 3 and 4, arcuately shifting the V-crotch members tends to reshift the stock rearwardly so as to clear any potential obstructions which the front of the stock may encounter.

Another embodiment of the invention contemplates the sequential use of a `combination of the arrangements shown vin FIGURES 2 and 3 wherein certain of the V- crotch members 54 would 1lbe mounted first for transverse pivotal movement, and other V-crotch members would be mounted thereafter for longitudinal movement, th-us combining the advantages of both arrangements.

FIGURES 5, 6, 7 and 8 show yet vanother arrangement of the invention wherein the supporting arm S0 is mounted for transverse axial rotation to bring the V-crotch members 54 into and out of operative position. If the V- crotch members 54 cannot be mounted suciently beneath the surface of the inclined table 42, for unloading of the workstock onto the table, an unloading -blade 82 (FIGURES 6 and 7) may be secured to the supporting arm 80. Rotation of the supporting arm will then bring the unloading blade 82 into contact with the under side of the drawn workstock W to lift it upwardly and free of the V-crotch members 54. Thereafter, the workstock W will be free to roll to one side -of the anti-recoil mechanism and then onto the surface of table 42.

The supporting arm 80 may be rotated by motor and lever means such as shown in FIGURE 7, including a uid motor 84, and a lever 86 pivotally secured to the piston rod 88 of the motor, and rigidly fastened to one end of a supporting arm pivot rod 90, whereupon linear movement of the piston rod 88 is translated into rotary movement of the supporting arm rod 99.

VAn alternative to the uid motor and lever arrangement of FIGURE 7 resides in the utilization of a rotary movement actuator 35 (see FIGURE 7A) directly connected in axial alignment with pivot rod 90, by a coupling member 92. Actuator may be a linear to rotary motion translator such as Iare in common use for instance in opening and closing large industrial valves and the like. These devices are |well understood by those skilled in the art. It will be apparent from an inspection of FIGURES 7 and 7A that the function of both devices is the same, only lthe actuator means being different.

Referring now to FIGURE 9, ya modification of the species of the invention illustrated in FIGURES 3 and 4 is shown. In this embodiment instead of pivotally swinging 'the stock intercepting crotches 54 on a Aframe about a pivotal axis of rotation as shown in FIGURE 3 and FIGURE 4, the FIGURE 9 embodiment utilizes a pair of `guideways 94. Bracket 96 supports the work intercepting crotches 54 and is permitted to move in a vertical plane. Vertical movement `of bracket 96 is controlled by a fluid motor 98 serving generally the same function as fluid motor 56 of FIGURE 2, fluid motor 72 of FIGURES 3 and 4, and fluid motor 84 of FIGURE 5.

The embodiments of the invention shown in FIGURES l, 2, 3, 4 and 9 each perform a common function, towit: To intercept and transfer drawn and arrested workstock W onto table e2 by virtue of shifting the crotch members 54 below the surface of the table 42. The embodiments of the invention illustrated in FIGURES 1 through 9 each perform this common function, whether it be by means of shifting the crotches beneath the surface table7 or lby `deflecting the workstock `from the crotches 54 by means of deflecting blade 82 shown in FIGURES 6 and 7.

The embodiments of the invention shown in FIGURES 10 through 13, however, are predicated on a somewhat different principle. In these embodiments an inclined table 42 is not employed to coact Awith crotches 54 in the manner shown in the FIGURES 1 through 9. Additionally, the means of `aligning the work intercepting crotches beneath the path of the workstock is predicated on la principle different from that heretofore described.

Referring now more specifically to FIGURES 10 through 13, this embodiment of the invention herein illustrated is based on the concept of swinging the Workpiece crotch intercepting members 54 in an arcuate horizontal path to one side of the drawbench 10 in order to permit the carriage to pass over the idrawbenoh without interference with the workstock intercepting apparatus. Thereafter, -by synchronizing relay and limit switch means well understood by those skilled in the art, and not constituting a part of this invention, a mechanism is actuated which swings the intercepting crotches 54 into position to perform the function of receiving and `arresting the forward motion of the stock.

To this end, the crotches 54 are mounted on a pivot arm 10i) secured to and adapted -to pivot on vertical stanchion 112 about axis 1132. Thus, 'as viewed in FIG- URE 10, pivot arm 11?@ assumes two positions in the horizontal plane to wit: position A, shown in phantom, at the side of and parallel to the longitudinal axis of the drawbench 1o; and position B transverse yof the drawbench and beneath the path of lthe workstock W being drawn. A fluid motor 164 is pivotally fastened by piston rod 166 to the end 108 Vof lever member 111i, which in turn is rigidly secured to the base of stanchion 112. Thus, energization o-f fluid motor 164 through lthe niembers just `described will cause arm 161)l to shift from position A to position B.

Also rigidly fastened near the base of vertical stanchion 112 is `a platform 11d to which is mounted yet another fluid motor 116. As best shown in FIGURE 12, arm 10i? is pivotally secured to the top of vertical Stanchion 112, and fluid motor 116 is pivotally fastened .to a connecting lever 113 rigidly secured to arm 181). It will become apparent, therefore, that energization of fluid motor 116 will cause ann 11211* to pivot the crotch members S4 into upright position beneath the path of the workstock being drawn. After the completion of the drawing cycle, uid motor 11o is energized to urge lever 11S (FIGURE 13) upwardly, thereby rotating arm 106* to shift V-'crotches 54 from a vertical plane in the `direction away from the viewer of FIGURES 12 and `13 into a horizontal plane. At the same time, work engaging fblade S2, normal to crotches S4, shifts into lthe vertical plane vacated by crotches 54. Blade S2 makes upwardly lifting contact with the underside of the workpieces, which are then free to roll along its inclined top edge to one side of the drawbench.

Reference is now made to FIGURES 14 and 15 which show control means for operating the embodiments of the invention illustrated in FIGURES 1 through 9, inclusive.

As chain '22 draws carriage 34 across the drawbench a lug makes contact with switch throw 'arm 36 to close limit switch IJs-1. Relay R-1 is thereby energized to `close contacts C-1 and aotuate solenoids 132 of double acting air cylinders 56 (FIGURE 2), 72 (FIGURE 3), 84 (FIGURE 7), 85 (FIGURE 7A), or 9S (FIG- 6 URE 9). Initial actuation lof any of the above identified air cylinders retracts the V-crotch member 54 to unload tubes W in the manner fully described hereinabove.

As carriage 34 :continues to be :drawn across drawbench V10, lug 35 opens normally closed limit switch LS-2 by contacting switch lthrow arm 3-7 which d e-energizes relay AR-l and opens contacts C-1, whereby air valve solenoid 132 is -de-energized to reverse the double acting cylinder and return the V-crotches 54 to the raised position. Manual push buttons PB-I and PB-Z are also provided in the circuitry for the purpose of manually controlling the actuation of relay R-l.

FIGURES 16 and 17 illustrate schematically the operation of the embodiment of the invention shown in FIG- URES 10" Ithrough 13, inclusive. For instance, as carriage 34 proceeds along drawbench 10, lug 35 shifts a two-Way operating air valve lever 134 into 4the open lposition, releasing pressure to solenoid actuated normally open air valves 136 and 138. Inasmuch as air valve 136 is normally open to Iair cylinder 104, `cylinder 104 is immediately actuated to pivot arm 11)@ (see FIGURE 10) into transverse position with respect -to the 4draw path of the work stock W. A pressure valve 140 is interposed between air valve 134 and lair valve 138 to delay actuation of air cylinder 116 until air cylinder 1114 has pivoted arm 1110* into the aforesaid transverse position. Thereafter cylinder 116 (see FIGURE 11) rotates arm 160 90i degrees from the horizontal to the vertical.

After the tubes have ybeen drawn and have ydropped into V-crotches 54, push button Pi-3` is depressed to yactivate relay R-2 which `closes contacts C-Z, permitting activation of relay R-3. Actuation of relay R-2 and contacts C-Z also energize solenoid valve 138 to exhaust spring return cylinder 116. V-crotches 54 are rotated into a horizontal plane thereby unloading Work stock W onto inclined blade 82. Push button PBA is then depressed activating relay R-3 and thereby closing contact C-3 to energize solenoid air valve 136 to exhaust spring return cylinder 104. Cylinder 104 then shifts pivot arm 161) from the transverse to the longitudinal position relative .to drawbench 10. Closing of relay R-3 and contact C-3 also permits activation of relay R-4 by push button PB-S which reverses the direction of the draw chain 22 to return the `carriage 34 to the die stand 32.

In returning to the die stand, carriage lug 35 closes valve 134 and opens normally closed limit switch LS-S which thereby reopens all relays and contacts so that valves 136 and 138 are returned 'to their normally open position ready for the next cycle. Push button PB- is a manual override for limit switch LS-3.

It is understood that a plurality :of arms 1410 and associated means may be spaced `as necessary along the longitudinal axis of the drawbench. The timing 'and control programing means employed is adapted -to shift the arms from position A to position B and return in synchronization with the movement of the `drawbench carriage so as -to provide clearance for the carriage both during the drawing portion of the cycle ,and the return of the carriage to the die stand. Such programing means are well understood by those skilled in the art, and further elaboration is not considered necessary for a full and complete -understanding of the invention.

Still other yarrangements and modications will be suggested upon a reading of the specification taken in conjunction with the drawings and appended claims, and these other arrangements may be resorted to without departing from the spirit and scope of the invention as defined by the appended claims.

I claim:

1. In combination with a die stand draw carriage and dravvbench, workstock energy dissipating means comprising: an upstanding V-shaped crotch positioned beneath the workstock drawpath to receive drawn workstock therein, and means to shift said V-shaped crotch to release said workstock therefrom. y

2. The device set forth in claim l, including: a pair of resiliently flexible members yieldable to contact by said draw carriage secured to opposite sides of said J-shaped crotch and extending upwardly therefrom to straddle opposite sides of said workstock, whereby said resilient members guide drawn workstock into said crotches.

3. The device set forth in claim l, including: a high coefficient of friction substance applied to the inner surfaces of said V-shaped crotch.

4. In combination with a die stand and drawbench, works-took energy dissipating means comprising: an upstanding V-shaped crotch positioned beneath the workstock drawpath to receive drawn workstock therein; workstock receiving means; and means to shift said V-shaped crotch to transfer said drawn worlistock from said V-sha-ped crotch to said workstock receiving means.

5. In combination with a die stand and drawbench, stock anti-recoil means comprising: an upstanding V-shaped crotch positioned beneath the workstock drawpath of the drawbench to intercept therein drawn workstock; workstock receiving means beneathrsaid workstock drawpath and adjacent said V-shaped crotch to coact therewith; said V-shaped crotch being movably secured to said drawbench for shifting workstoek from said V-shaped crotch to said stock receiving means.

6. In combination with a die stand and drawbench, workstock energy dissipating means comprising: an upstanding V-shaped crotch positioned 4beneath the workstock drawpath to receive drawn workstock therein when released from the die stand; workstock receiving means adjacent said V-shaped crotch and inclined transversely toward one side of said drawbench; and means to shift said V-shaped crotches from above to beneath said workstock receiving means whereby said -Workstock is transferred from said crotch to said workstock receiving means.

7. In combination with a drawbench, stock anti-recoil means comprising: sets of transversely arranged upstanding V-shaped crotches positioned beneath the workstock drawpath, said sets being spaced apart along the longitudinal axis of said drawpath; workstock receiving means adjacent each transversely arranged set of V-shaped crotches, said V-shaped crotches being mounted on said frame to `be shiftable beneath said workstock receiving means; whereby drawn workstock intercepted by said crotches is transferred therefrom by shifting said crotches beneath the workstock receiving means.

8. rI'he device set forth in claim 7 including: pairs of resilient menrbers secured to opposite sides of said V-shaped crotches and extending upwardly therefrom, whereby said resilient members guide drawn workstock into said crotches.

9. The device set forth in claim 7 wherein said V-shaped crotches are mounted to shift downwardly beneat-h the drawpath of said drawbench and transversely thereto.

y1G. The device set forth in claim 7, wherein said V-shaped crotches are mounted to shift downwardly beneath the drawpath of said drawbench and longitudinally therewith.

11. The. device set forth in claim 7, wherein said V-shaped crotches are mounted to shift vertically beneath the drawpath of said drawbench.

12. The `device set forth in claim 7, wherein at least one of said sets of crotches is` mounted to pivot downwardly beneath the drawpath of said drawbench and transversely thereto, and at least a second of said sets of crotches is mounted to pivot downward-ly beneath the drawpath of said drawbench and substantially longitudinally therewith.

13. In combination with a die stand and drawbench, workstock energy dissipating means comprising: a workstock supporting platform beneath the drawpath of said drawbench extending longitudinally therewith and being inclined transversely thereto; a plurality of openings in said platform spaced apart along the longitudinal axis of said drawpath; supporting arms positioned in said open'- ings and shiftably secured to said drawbench; at least one upstanding V-shaped crotch secured to each of said supporting arms; and means to shift said supporting arms to lower said V-shaped crotches beneath the said workstock supporting platform; whereby drawn workstock intercepted in said V-shaped crotches is transferred to said platform when said V-shaped crotches are shifted beneath said platform.

14. In combination with a die stand and drawbench,

workstock energy dissipating means comprising: an upstanding V-shaped crotch positioned beneath the workstocl; drawpath, said V-shaped crotch being mounted on Said drawbench to rotate about a horizontal axis transverse to said drawpath; and blade means fastened normal to said V-shaped crotch to rotate upwardly therewith and lift workstock clear of said V-shaped crotch as said V-shaped crotch is rotated downwardly.

15. The device set forth in claim la, 'wherein the work contacting edge of said blade is transverse to said drawbench and inclined to one side thereof, whereby workstock lifted from said V-shaped crotch by said blade will roll along said work contacting edge of said blade to one side of said drawbench.

16. In combination with a die stand and drawbench, workstock energy dissipating Imeans comprising: a workstock supporting platform beneath .the drawpath of said drawhench extending longitudinally therewith and being kinclined transversely thereto; a plurality of openings in said platform spaced apart along the longitudinal axis of saidV drawpath; supporting arms positioned inv said openings and shiftably secured to said drawbench; a plurality of upstanding V-shaped crotches secured to each of said supporting arms; and means to shift said V-shaped crotches from above to beneath said workstock supporting platform to lift workstock from said V-shaped crotches onto said platform.

17. In combination with a die stand and drawbench, workstock energy dissipating means comprising: a workstock supporting platform beneath the drawpat-h of said drawbench extending longitudinally therewith and being inclined transversely thereto; a plurality of openings in said platform spaced apart along the longitudinal axis of said drawpath; supporting arms positioned in said openings transverse to the longitudinal axis of said drawpath; a plurality of upstanding V-shaped crotches secured to each of said supporting arms; means to pivotally connect said supporting arms to said drawbench; and means to arouately pivot -said supporting arms downwardly be- 'low said platform; whereby workstock pieces engaged in said V-shaped crotches are lifted from said Vshaped crotches responsive to engagement with said inclined piatform.

18. In combination with a die stand, drawbench, carriage, and workstock energy dissipating means comprising: a V-crotch supporting arm mounted adjacent and parallel to one side of said drawbench in a horizontal plane beneath the worlcstock drawpath; means to horizontally shift said arm between said parallel position and a position beneath said drawpath transversely thereto; at least one V-shaped crotch secured to said arm; a workstocl; intercepting blade secured to said arm and normal to said V-shaped crotch; and means to rotate said arm about its horizontal axis to shift said V-shaped crotch and said intercepting blade sequentially into and out of vertical and horizontal planes respectively when said arm is in the said transverse position.

19. 'I'he device set forth in claim. 18, including iirst fluid motor means to shift said sup-porting arm horizontally from the said parallel position to the said transverse position; second fluid motor means to rotate said supporting arm about its said horizontal axis; valve means operable by movement of said carriage along said draw- 9 l@ bench to energize said uid motors, and second valve Referenees Cited in the ie of this patent means interposed between said second uid motor means UNITED STATES PATENTS and said first mentioned valve means adapted to delay r actuation of said second fluid motor means until said 2,630,910 Turner Mf- 10, 1933 rst ud motor means has shifted said supporting arm 5 2,373,849 LOIlbafd FSO. 17, 1959 into the said transverse position.

Claims (1)

1. IN COMBINATION WITH A DIE STAND DRAW CARRIAGE AND DRAWBENCH, WORKSTOCK ENERGY DISSIPATING MEANS COMPRISING: AN UPSTANDING V-SHAPED CROTCH POSITIONED BENEATH THE WORKSTOCK DRAWPATH TO RECEIVE DRAWN WORKSTOCK THEREIN, AND MEANS TO SHIFT SAID V-SHAPED CROTCH TO RELEASE SAID WORKSTOCK THEREFROM.

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