US2928526A - Die assembly - Google Patents

Description

March 15, 1960 w. E. KERR DIE ASSEMBLY 8 Sheets-Sheet 1 Filed June 7, 1954 INVENTOR. ACE E. KERR A T70R25 Y March 15, 1960 w. E. KERR 2,

DIE ASSEMBLY Filed June '7, 1954 8 Sheets-Sheet 2 FIG. 2

' 22 I6 INVENTOR.

WALLACE E. KERR ATTOR EY W. E. KERR DIE ASSEMBLY March 15, 1960 8 Sheets-Sheet 3 Filed June 7, 1954 INVENTOR. WALLACE E. KERR @4100 TT RNEY,

w. E. KERR DIE ASSEMBLY March 15, 1960 8 Sheets-Sheet 4 Filed June 7, 1954 wax u wm 7 2 II 9 2 w 6 L F 6 22 .534 ll 4 4 2 "I: Q 7 \\1H 2W..\\ 0 Mi 9 a u u I G /I IN V EN TOR. WALLACE E. KERR FIG. 5

ATTORNEY W. E. KERR DIE ASSEMBLY March 15, 1960 8 Sheets-Sheet 5 Filed June 7, 1954 INVENTOR. WALLACE E. KERR ATTORNEY W. E. KERR DIE ASSEMBLY March 15, 1960 8 Sheets-Sheet 6 WALLACE E. KERR ATTORN 8 L INVENTOR.

4 H n 2 F 5 5 9 Filed June 7, 1954 W. E. KERR DIE ASSEMBLY March 15, 1960 8 Sheets-Sheet 7 Filed June 7, 1954 FIG. /0

ATTO

W. E. KERR DIE ASSEMBLY March 15, 1960 8 She ets-Sheet a Filed June 7, 1954 E m F INVENTOR. WALLACE E KERR A TTORNE Y DIE ASSEMBLY Wallace E. Kerr, Poland, Ohio Application June 7, 19-54, Serial No. 435,015. 3 Claims. c1. 205-3 This invention relates to drawing die assemblies and more particularly to die assemblies for use in the cold drawing of metal stock such as bars, rods and other metal articles.

The principal object of the invention is the provision of an improved die assembly arranged to utilize the drawn product to effect control of the cast of the die and hence eliminate deflection in the drawn product.

A further object of the invention is the provision of a drawing die assembly arranged to impart continual progressive corrective casting to the die whereby an axially straight drawn product may be produced. regardless of progressive variations as to size, geometric form, hardness, straightness, surface, inclusions, grain size, etc., as well as variations in die lubricant, the presentation of the stock to the die and such other factors as have heretofore resulted in deflections in the drawn product.

A still further object of the invention is the provision of a method of producing a longitudinally and uniformly straight drawn'product' through the use of the drawn product for continually and progressively casting the die through which the drawn product is passing.

A still further object of the invention is the provision of a drawing die assembly which will insure that the push-through ends of the drawn product emerge from the die assembly in straight, axial relation so as to properly enter the gripping jaws of the;draw buggy.

A still further object of the invention is the provision of a die assembly incorporating target means for receiving the push-through ends of stock being drawn and a die mounted for universal movement so that the stock passing through the die and engaging the target means acts as a lever moving the die responsive to the irregularities in the stock entering the die to produce a uniform longitudinally straight product.

A still further object of the invention is the provision of a die assembly arranged for fixedly casting or swiveling the die in a universally movable die mounting.

Those-skilled in the art of cold drawing of various.

metal articles, such as steel bars and the like, will recognize that the method of die drawing and the die assembly disclosed herein will eliminate several of the difiiculties heretofore inherent in a die drawing process. 7

One of the difiiculties eliminated is the tendency of a 2,928,526 We! ,Mr: 1 2? tofore. known in the art become immovable withf'the result that whatever cast or slant exists in the drawing" die remains throughout the drawing opera tionand pro-1 duces undesirable deflection in the drawn piece. During the drawing of the stock with the die assembliesheretm fore known in the art, the irregularities in the stock 1 affect the area of engagement of the drawing die therewith and, as a result, impart various curves to the stock. emerging from the drawing die.

The present invention acts to utilize such irregularities to continuously reposition the drawing die so as to continuously offset any tendency of the irregularities to part deviation to the drawn product.

As hereinafter disclosed, the principal point of novelty making possible the accomplishment of the aforesaid.

objects will be found to comprise the universally movable mountingof the drawing die, the mounting being ar-' ranged for fixed positioning of thedie during the initial. positioning of the stock to be drawn through the die and thereafter freed so that the die will move as a result of lever actionimparted thereto by the stock being drawnv engaging the target means provided.

Those skilled in the art will observe that the movable mounting of the drawing die is in itself incapable of effecting the desired results without thev presence and action of the target means which in the present disclosure comprises a structure incorporating rollers for engage ment with the drawn stock after it. emerges from the rawing die. T

The target means comprising the structure, including the rollers, is spaced with respect to the drawing die and independently supported and is capable of directing the drawn stock on a given line. I With the foregoing and other objectsin view which, will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and;

claimed, it being the intention to cover all changes and section of stock to be drawn, upon being introduced into a drawing die and pushed therethrough, to curve and thereby move away from the gripping jaws of the draw buggy. Those skilled in the art will recognize that such curving or deflection of the stock. tov be drawn can be corrected by slanting or casting the die with respect to the axis of the entering stock thereby changing the relative areas of engagement between the die and the stock and eliminating the tendency of the stock to curve.

Proposals have been madein the past to so slant or cast the drawing dies and have been partially successful.

for the immediate object-.thatof drawing the stock into" the. gripping jaws of the draw buggy. At such amen the draw buggy tensions stock, the drawing dies here iii chosen for purposes of the disclosure, which do not constitute departures from the spirit and scope of the inven tion. a Y The invention is illustrated in the accompanying drawing wherein:

Figure 1 is a perspective view of the die assembly'with parts broken away and parts in cross section.

Figure 2 isra side elevation of the die assembly'on' the headstandof a draw bench with parts in cross section.

Figure 3'is a back elevation of the die assembly, shownin Figure 2 of the drawings and taken on line 33 of Figure 2. y Figure 4 is a horizontal section taken on line. 4-4 of; Figure 2. a a Figure .5 i's'a horizontal sectiontaken on line 5-5 of FigureZ. p r a 1 Figure 6 is aside elevation with parts-brokenfuaway and parts in. cross section'illustrating a modified-form'oi: die assembly. V 5 Figure 7 is a back elevation of the modified diev as? sembly, 'wtih parts broken away, taken on line 7''7'of: I Figure 6. Section lines 66 on Figure 7 indicate;v

section of Figure 6. I

on line 8-8 of Figure 6.

Figure 9 is a horizontal sectiontaken online. 1

v Figure 6.

Figure 10 is a horizontal section taken on line of. Figure 6.

Figure 11 is a schematic diagram of .an electricafcirz'i -cuit for automatically locking and unlocking the dices?- sembly shown in Figures 1 'and' 7 ofthe drawings-x j .FigurelZ is a symbolic diagram of a modified means for casting a drawing die assembly during a drawing operation.

nFigili'e' 13 is a symbolic dlagram of a drawing die and" anflobjectdrawnitherethroughand showing the influence ofzthe die ;with respect to deflecting the drawn article.

*By referring to the drawings and -Figures' 1 and 2 in particular,'it:will be seen thatthe headstand of a draw "bench is generally indicated by the numeral 10 and that a multiple dieblock 11 is positioned thereonin a manner knownin theart and adjacent the area of the draw bench on which a draw buggy (not shown) is operated. Thei'die block 11 has at least one horizontal opening therethrough and means for positioning a drawing die in said opening,fincluding aufirst movable gimbal 18 positioned in said opening for oscillating movement about the; horizontal axis of said gimbal.

A second gimbal. .lsor support for a drawing die is positioned in said-first "i 3 assesso :fif

, 26 is mounted on. monnting'bracketfl by. means of pivotal shafts 28,. 28 secured thereto. Each of the mounting brackets 27 is in -turn pivoted as by a secondary pivotal shaft 29 to the target roller frame 23 and is movable with respect thereto.(see Figures 2and 4 0i the drawings) by adjustment screws 30, 30, each of which is secured at one end to a sphere 32, and retained by snap rings in socketsin the frame 23. The other ends of the screws 30, 30 transversely threadably engage cylindrical members; 31 mountedin -the respective mounting brackets 27"and lock nuts secure the assembly in desirable adjustment. i -1 I It will thus be observed that by. rotating the screws 30, the mounting brackets 27 maybe moved 'with respect to their pivots 29 so as to move the rollers 26 toward and away from the passline therebetween on which an article to be drawn is positioned.

gimbal'18 for oscillating'movement about the vertical axis of said second gimbal 15. A drawing die D is positioned in said second gimbal with its axial opening on the horizontal axis of said opening in said die block 11.1 The headstand 10 of the draw bench also supports a steady guide12 in position in front of the die block 11 so that bars, tubes or other workpieces to'be drawn through the dies carried by the die block may be steadied by tliesteady guide 12.

I 'The steady guide '12 is positioned 'on the pass line and, other than receiving and guiding thearticle to be drawn, it has no part in thepresent disclosure.-

-.; Afterj leaving the "steady guide 12, the forward end It will'fbe seenlthata rod to be drawn, for example,

passing through the die D and centrally ofthe plural ity of rollers 26 will act as a lever to tilt or cast the die 7 D responsive to deflections in the rod as the same engages the rollers 26. whichare' pro-set in fixed position torotatably contact the surface of the rod. 7

Thoseskilled in the artwill recognize that in initially positioning a workpiece such as a rod; for example, through'the die D andfthrough the area'defined by the rollers 26, 26 will require that the-die D be held stationary so that the point-of the workpiece emcrging from the of the work piece to be drawn enters the die carrying portion of the die block 11 and passes through an opening' 13 in a plate 14 which is removably secured to the support for the drawing die which is the second or inner gimbal 15. mounted-on its vertical axis through vertical trunnions 16 and 16a which are positioned in anti-friction bearings 17 and 170, respectively, mounted in vertically aligned openings in the'first or outer gimbal 18. The outer gim- The inner gimbal .15 is' movably rollers 26 may be 'in alignmentwith the gripping means of the draw buggy and therefore be capableof being gripped thereby andthe. drawing operation performed.

In order to holdthe die mounting, hereinbeforedescribed as comprising the inner gimbal 15, andtheouter, gimbal 18 in such stationary relation for the llllllai 1 presentation of theeworkpiece therethrough, means has been provided and comprises. a locking bolt 33 which is positioned verticallyabove and in axial alignment with a the trunnions- 16 and 16a bil the inner gimbal 1st bal 18 :is provided with horizontal semi-trunnions 19.- which engage'rollers 20, 20 positioned in semi-annular.

20.: 20 being of resilient material to urge the remaining rollers from bottoming'toward retaining abutments119b asseenin Figures 1 and 5 of the drawings. Pivot pins 19a retain the outer gimbal 18 in the die block 11.

raceways in the die block 11, one or more of the rollers clutch 40 which is adapted for registry with mating re- 1 -"The die D mounted in a die casing 21, which in turn' It will be observed that the vertical trunnions'16 and 1 16a of th e' inner gimbal have a relatively small resisting radius while the semi-trunnions 19, 19. of ,the outer gimbal have a' similarly smallresisting radius, which factors contribute to the freedom of motionof the die mountingmeans thus formed and particularly during a' drawing operation.

. Immediately adjacent the die block 11 there is a target roller frame 23 whichis secured to the die block 11 by a"plu'rality of fasteners 24, 24, as best shownin Figure 3 of the drawings A By referring to Figures 3 and 4 of the drawings it will. be seen that a workpiecepassing through'the die Dj'w'ill As illustrated in "Figures 1 and S of the drawings;

the locking bolt33 is positioned within an upper bore of a supporting member 35 carried ina vertical opening 36in the die block 11. Uprights 34 mount a pneumatic piston and cylinder assembly 37, a piston rod 38 of which depends from the assembly and is coupled as at 39 to the upper end-of the locking bolt 33. The lower end of the locking bolt 33 is provided with a spring pressed toothed cesses 41 formed in an enlarged matching clutch member 42 affixed to the trunnion 16, as best shown in Figure l of the drawings. The clutch 40 is square and slides within a supporting member. I t I Those skilled the art will observe that when the piston andcylinder assembly '37 is-actuated so as to move the piston'rod 38 downwardly-as shown in Figures 1 and 2 of the drawings, theclutch 40will engage the matching clutch 42 and thereby holdthe inner gimbal 15aga1nst movement while the" locking boltg33moves downwardly and engages a center axial rec ms within thetrunnion 16 to hold the outer gimbal 18 stationary.

Automatic ;means for efiecting the movement of the pneumatic piston and cylinder assembly and hence the locking bolt 33 are preferablyincorporated in the dBVlCC,

and" hereinafter described. Such means are conveniently continuouly e'merge therefrom and enter an opening: 25

in the target roller frame 23 so tha t a plurality of rollers 26, 26 spaced circumferentially about the target roller frame 23 will be engaged thereby while the workpiece is still passing through thedie D.- Each ofthe rollers controlled through electrical circuits utilizing the target rollers 26, heretofore referred to,;1and the workpiece to be drawn, as ats'uch time-as the workpiece isengaged only in the 'die'D. inthe gimbals 15 aiid18, the same must be held'stationary,.whereas when the workpiece advances out.

of the die and engages the target rollers' 26, the gimbals 15 andg18 must s n tomove' andihenc'e thepneumatic From the description i th us p tonand" cylinder assemblyj is retracted to efiectively k withdraw-the locking bolt 33. j J

far" it will occur to; those skilled in thefartjthatjthefinvention disclosedherein pplicable e multiple gnit iustallation on a conof the drawings.

yentional. draw bench having a normal rated triple drawc'apacity of 1 /2" rounds or equivalent drawn bar size. "It will be obvious that multiples of the die assembly may be used on a single draw bench in which case additional steady guides 12 will be employed. Each steady guide 12 is adapted to be individually adjusted to accommodate any stock bar, tube size or geometric shape within its range. a e

In the preferred embodiment of the invention, the inner gimbal 15 is provided with the face plate 14 having the opening 13 therein through whichthe workpiece to be drawn is introduced into the die and, so that the die itself may be adjusted with respect to the gimbal 15, the same is formed with a die ball receiving seat 43 in which a die ball 44 is positioned so as to support the die D, as best shown in Figures 1 and 2 of the drawings.

The plate 14 is provided with tapped openings in which adjustment screws 45 are positioned, the inner faces of which engage the die casing 21, and it will occur to those skilled in the art that the screws 45 comprise conventional means for adjustably positioning the die 6 I within its enclosing mounting and thus unlock and pet mit the steady roller adjustment. I

In the case of the form of the invention heretofore described and illustrated in Figures 1, 2, 3, 4, etc., means is provided for locking the inner and outer gimbals52 and 58 against motion during the initial engagement of: the workpiece in the die and this means comprises a locking bolt 62, the lower end of which is provided with a spring-pressed toothed clutch 63 engageable in a recess 64 positioned partially in the trunnion 56 and partially in a matching clutch member 65 which is affixed thereto.

The locking bolt 62 is actuated by a pneumatic piston and cylinder assembly 66 which is supported on v the die block 59 by a supporting member 68 which is ball 44 and the die D in the inner gimbal 15 so that a workpiece pushed therethrough will be caused to maintain a substantially axial straight form and thereby properly enter the area between the plurality of target rollers 26 and emerge therefrom to enter the gripping means of the draw body.

Since the die construction may comprise any one of several types known in the art and inasmuch as some of such constructions are quite short with respect to the area thereof within the die, the die may not be completely sensitive to the casting signal transmitted through the drawn stock. To anticipate and eliminate such an objection, a modification of the construction disclosed in Figures 1, 2, 3, 4 and 5 may be found to be desirable and wherein steady rollers may be rotatably affixed to the die support which is the second or inner gimbal, as shown in Figures 6 and 9 of the drawings and wherein the steady rollers are indicated bythe numerals 46.

The steady rollers 46 are each movable radially with respect to the pass line through the device which corresponds with the cross section line 9-9 in Figure 6 Each of the steady rollers 46 is resiliently mounted on a radially movable member 47 which has a rearward projection 48 engaged'in an armate cam slot 49 in a rotatable cam disc 50. Each of the members 47 has a bore mounting amovable plunger 47a engaged upon a leaf spring 47b and through which motion from the cam is transmitted.

- Thus rotation of the cam ,disc 50 as occasioned by a' pinion 51 will simultaneously move the plurality of steady rollersv 46 radially with respect to the pass line and thus permit close adjustment of these rollers to the workpiece thereby. in efiect extending the area of the spects to the gimbal 15.

The inner gimbal of the modified construction includes a face plate 53 which acts, through adjustment screws positioned within a vertical opening 69 in theidie block 59. i v

v The target rollers employed in the modified structure or Figures 7, 8, 9 and 11 of the drawings aresubstantially the same as those heretofore described in connection with Figures 1 through 5, etc., and includes a target roller frame 70, the target rollers being indicated by the rollers 71 and each of the same is pivoted by pivots I 72 to brackets 73 which are in turn pivoted as at "74 to, the mounting frame 70. Adjustment screws 75 actuate in the same manner as the adjustment screws 30 heretofore referred to.

-In Figure 8 of the drawings one of the mounting brackets 73 is illustrated in greater detail, the bifurcated uppermost portion 76 thereof clearly illustrating a cylinv drical recess 77in which the cylindrical member 78 on one end of the adjustment screw 75 is seated.

In Figures 6 and 9 of the drawings the rollers 71 are l shown, as having an annular insulating section 79 to gether with an electrical pickup 80 engaged against the,

roller 71 so that an electric circuit in connection with p the pickup 80 is extended to the annular body of the roller 71 and not electrically connected with the pivot 72. Thus, a workpiece entering the die D' passing through the die ball and through the area of the steady-rollers 46 will engage the target rollers 71 which are adjustable to the diameter of the workpiece and which may then be used for establishing an electrical circuit which may be used for controlling the pneumatic piston and cylinder assembly 66 heretofore referred to..

Thus, a workpiece may enter the die D while the locking bolt 62 is holding the gimbals 52 and 58 immovable and upon contacting the target rollers 71 and completing an electric circuit, the locking bolt 62 may be withdrawn to permit the free movement of the die mounting asalso hereinbefore described. I

vBy referring now to Figure 11 of the drawings a symbolic electrical diagram illustrates such a circuit as conductors 81 and 82, which are respectivelyiconnected by 54, to retain a die D in operative relation to a. die

ball 55. The inner gimbal 52 has vertical trunnions 56;

56 which are rotatably mounted in bearing assemblies 57, 57 as in the case of the inner trunnion 15 heretofore described.

The vertical trunnions 56 are thereby rotatably positioned in an outer gimbal 58 which is positioned in a die block 59 by semi-trunnions 60, 60 which correspond with the semi-trunnions 19, 19 heretofore referred to. By referring now to Figure 10 of the drawings a representation of a socket wrench 61 may be seen en gaged upon the pinion 51 for adjusting the steady rollers 46 radially and in thisconnection it will be observed that the pinion 51 is movable axially against spring means ao'thatit may engage and disengage fixed internal teeth the pickup to the pairs of adjacently disposed target rollers 71; A workpiece serves to bridge'the .area between the rollers 71 and will thereby close a circuit ,7 i

through the conductors 81 and 82 which may then be vused for actuating a spring biased solenoid valve- (not shown) which in turn may control the pneumatic piston and cylinder assembly 66.

"It will be obvious to those skilled in the art that this i same arrangement may be used for controlling the i locking bolt 33 of the initially described device herein.

in Figure 12 ofthe drawings another method of cast ing a freely movable drawing die is symbolically illustrated and includes the die D positioned in an inner gim ball 83 having vertically extending trunnions 84 which are in turn journaled in an outer gimbal 85 provided i with horizontally extending semi-trunnions 86 which may be received in a die block to permit universal movement in communicationwith a source'of pneumatiepressure 90 and a multiplegcontrol valve 91 which in turn is actuated by levers 92 engaging means 93 having rollers 94 engaging the'workpiece, W and respondin g'to horizontal and vertical deflections from a desired axial position thereof and transmittingjsuch motion through the levers 92 to the control valve" 91 and thereby casting the die D as aforesaid.

strains intermediate said die and bodies, .s'aidkworkpiece further serving to successively reorient'casting movement with respect to said pass :line and' thereby effecting the cast and recast of said die, with respect to .saiddie block. f

2. In a1-drawing die, assemblycomprisinga fixed 'die blockhaving an opening therethrough; a construction including a" metal drawing die axially aflixed therein and'the axis ,of the said die generally aligned withinsaid opening and with a pass line therethrough and beingmovably seatedion said die block to afiord a degree ofdie universal casting movement with respect to said die block, said construction including an element of tional, mechanical structurel as described herein andillus;

trated in Figure 12 of the drawings. I

By referring to Figure 13 of the drawings a diagram:

matic illustration of a 'die D and a} workpiece W may be seen, it being observed that for th'e purpose of disclosing the distribution of the elongation within the workpiece drawn throughthe die D, the sketch of Figure 13 shows the die D cast or slanted with respect to the axis ofthe entering workpiece.

'It will be seen that external radial forces exerted onto the opposite sides, for example, the top ,and bottom the die are equal and as the bearing area of the workpiece is less at said topside than at said bottom side of the workpiece, the pressure per unit areais greater at the top side than at the bottom side. Hence, an elonga tion' at the top side greater than at theb'ottom side occurs as the workpiece moveslthrought he reducing zonefor the die so that the reduced workpiece is bowed downwardly as shown. a e a By re-casting the dieto overcome the unequal bearing areas of the stock, the drawn product may be straight ened and continuously drawn on an axial straight line as long as the die is continuously cast or slanted relative to and in accordance with such deflections asoccur in the workpiece being-drawn. v

It, will thus be seen thatthe die assembly disclosed herein operates ,to produce an axially straight workpiece by so positioning the drawing die foruniversal movei ment that the deflections of the'workpiece passingtheresides, of the workpiece within the constricting taper of through reflect in deviations from the axial alignment thereof to vary the flexure of the workpiece'against the target rollers to cause the workpiece to act as a lever to re-position the drawing die and thuselfect a self-cor reaction responsive to the deflection of the workpiece and whereby an axially straight workpiece is obtained. It willlthusbe seenthat the several objects of the invention aishereinbefore set forth are achieved by the provision of the method;of die drawing as herein dis closed on the apparatus herein illustrated and described and that, accordingly, the several objectsof the inven tion have been met.,

1. A drawing die assembly comprising a fixed die block having an opening therethrough; a construction including adie axiallyaffixed therein, so defining a dieaxis generally, aligned, with said opening and a pass line and so seated on said die block to affordadegre'e of, die, casting universal angular movement with re spect to said die block; target means beyond said die. block, including a frame secured to said die block and comprising bodies disposed about said pass line and affixed within said frame; a workpiece thrust i gto, through Having thus described my invention, what I claim a locking means; a frame secured to said die block and,

spaced beyond s'aid constructionrtarget means comprising bodies disposed about said pass line, afiix'ed within said frame andeach of the said bodies constituting a;

contact for an uncompleted electrical control circuit; a,

locking means withdrawably afiixed to said die block, engaged within said elementfor locking said casting movement, said locking means including an actuating assembly for effecting disengagement thereof; an elec- ,trical circuit and control for controlling said actuating assembly; a metal workpiecethrust into, through and beyond said die and contacting said bodies thereby simultaneously imposing onto said workpiece multifold functions of effecting a bridge therebetween the said bodies, thus. completing said electrical circuit, actuating said con? i trol and actuating assembly and thereby eflecting withdrawal and disengagement of 'saidlocking means as said bodies serve .to confine said workpiece centrally with respect to saidpass line; also thereby said workpiece serves as a lever, to orient the disposition of the said axis" of the said die' angularly with respect to said draw axisthereby effecting the cast of said die with respect to said die block. i i 3. ;In a drawing die assembly embodying a fixed die blockhaving an opening therethrough; a support includingia die axially afiixed therein and the axis of the said die generally, aligned within said opening and with a i pass line therethru andxbeing movably seated on said die block to afford a degree of dieuniversal angular casting movement with respect to said die block; a device alfixed to said support and spaced beyond said die,

said device having members retained therein and disposed about said pass line, each said member mounting a steady roller likewise disposed about said pass line; targetmeans beyond comprising a frame secured to said die block, bodies mounted therein and disposed about said passline; a workpiece thrust .into, through and beyond said device so contacting said bodies; a spring intermediate each said respective member and steady roller to etfect constant close (adjustment thereofmto said workpiece which being confined centrally with respect to'said pass line ,by said bodies serves as a lever applied to said deviceto angularly orient, the die casting movement and upon successivedegrees 'of workpiece unstraightne'ss successively appearing intermediate'said de vice andbodies, the workpiece further servingto succes- 1 V sively angularly reorient said diecasting movement with respect to saidpassline thereby etfectingthe said universal angular cast and recast of said die with respect to'said die block." 3

and beyond said die, so contacting said bodies and being thereby'centrally confined with respect to said pass line;

References Cited file of this patent UNITED STATES PATENT Sf 295,898 Billings -9. Apr. 1, 1884 2,147,888 Gaines Feb. 2l, 1939 2,323,700 Bailey July 6, 1943 2,602,539 See ..-.July 8, 1952 2,685,206 F illebrown Q. ..Aug. 3, 1954 q 'FOREIGN' PATENTS" 155.629 Australia ;r Mar. 10,1954 8 592,831. GreaLBritaii'i Sept. 30, 1941

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