US2603854A - Die rolling machine - Google Patents

Description

July 22, 1952 .1. GAVURIN DIE ROLLING MACHINE 5 Sheets-Sheet 1 Filed May 25. 1949 mmvrom 5 g A; IrraQ/VEY July 22, 1952 J. GAVURIN I DIE ROLLING MACHINE 5 Sheets-Sheet 2 Filed May 25. 1949 I INVENTOR. Hf

flrrae/vsr J. GAVURIN DIE ROLLING MACHINE July 22, 1952 5 Sheets-Sheet Filed May 25. 1949 11, l yj I 5 Sheets-Sheet 4 J. GAVURIN INVENTOR.

fi oe/ws'r July 22, 1952 DIE ROLLING MACHINE Filed May 25. 1949 ZIIIIIIII'IIII'IIII VIIIIIIIJrlfl/l/llll'l!rfllllflllllf 5 Sheets-Sheet 5 Filed May 25. 1949 Hag INVENTOR.

flrroe/vir Patented July 22, 1952 3 UNITED STATES PATENT @FFICE Inc RQLLING MAGHIVNE Jacob Gavurin, Brooklyn, N.-

7 Application May'25, 1949, Serial No. 951-309 8 Claims.

'Ihis invention relates to improvements in die rolling machines and relates more ispecificallyto an improved Jroller forging machine having an improved blank feeding and shaping means.

'-'The forging of blanks by die rolling methods has certainadvantages over a drop forging arrangement and the general method more readily lends itself to continuous=and automatic treatment of the stock. 'Difiiculty has usually been experienced in the feeding of the stock to the dies and in maintaining the blanks in perfectly fiat condition during the rolling operation as well as after they leave the die. I An important-object of the present invention is to provide a complete machine 'which feeds the stockcontinuously to the rollingdies with heating means for the stock if such is required, the machine having an improved die rolling assembly and means for preventing lateral distortion of the blank flash during the die rolling operation. The complete machine further has an improved punching and trimming assembly and if the work is of such character as to require col"-; ingbeforethe trimming operation, novel'conveyor means are provided "for transporting "the rolled blanks which have been cut from the feeding stock a sufiici'ent distance to .allow for cooling before they are introduced to the trimming and punching assembly.

The conveying, punching and trimming and assembly formsthe subject'm-atter'df my eoepend; i-ng. application, :Serial No. 98,180, filed June. 10, 1949 although it is an integral 'part of the entire machineiwhich performs all of the aforesaid operations in a continuous, fully automatic'zfashion; The feeding, heating, shaping, die rolling and finished blank delivering assembly which forms the subject matter of the :present application 'is'a' compa'ctunit which is readily ad-justable'to take stock of varying'sizesand the dies associated with the rollers are readily replaceable with dies fo'rforming different operations thus providing a flexible assembly for accurately fforming' all sorts of articles. E v. v 1' Another object of the invention is to:v provide a novel die rolling assembly wherein the dies have complemental matrix grooves-whichform the blank and oneof the dies-hasside walls on the sides of the grooves to limit lateral flow'of the metal, "such side .walls passing into recesses in-th-e other die., A'further-object'of the invention is to provide novel means for grasping the leading :edgeof .the formed blank as it emerges from the' matrix grooves, preventing distortion -of;- the blank and (ems-34) V delivering itv in perfectly flat conditionfonthe next operation. r 1 Another object of the invention is to provide side wall sections on oneof the dies and recesses on the otheri die receiving such side-walls for preserving the true shape of theblank and preventing lateral distortion. In most any article forged by the machine of the present invention, various parts of the article have a'greater thickness than other parts. "FA's the metal flows into the 'die recesses" it has a tendency to move laterally' asit emerges from the dies and edges'intendedto-be straight are rendered non jstraight'. With the arrangemento'f the present invention,

thesidewalls'prevent"this occurrence. 7 k

' --Afurther objectfof the invention is to provide improved "means for bending thestock to the general shape'of the die'recesses whichit is about to enter. This comprises novel jawmembefrs .which "operate automatically'to. bend the "stock to the desired shape, The. jaws are capableo'f infinite adjustments to produce ahydesired'dat- 'e'ral' bend in the stock. Yet another object of the invention is topro videnovel rotary brushes for cleaning the roller dies after each forging operation.

"In thefdrawings:

Fig.1 isa broken plan view of the feeding and heating sections of a machine embodying the present invention. v I

"'F igf2 "is a broken horizontal-section taken through the forward or rolling section of the machine. I, g I "Fig. 3 i-s -a b roken vertical section taken through the feeding section of the machine Fig. 4 isabroken vertical section taken through the rolling section of the machine. Fig 154s :a broken transverse section taken on line 5+5 ofFig. 3.

, Fig.6 is'a broken transverse section taken en line 6-,6?of Fig. 3. I ,-'Fig. 7' .is a broken pla'n view 'of the assembly for bending the stock-to as'sum'e the general'co'n tourfof'the dies. Fig. 8 is a broken perspective view of the mech anism I for operating the feeding section of the machine. I v v signs. is similar to'liig. a but shows aiiif-Q ferent'position ofthe cams. Fig. 10 a broken transverse section taken'on liners-1n of'FigIZ. i V Q, "Fig. 11' is a front elevation of a portion of-the bending mechanism.

Fig. 1215 a vertical section taken through the die assembly.

Fig. 13 is a broken section taken on line I3-I3 of Fig. 12.

Fig. 14 is a broken section taken on line I4I 4 of Fig. 12.

Fig. 15 is a front elevation of the cam assembly on the upper die.

Fig. 16 is a broken section taken on line I6I6 of Fig. 15. I

Fig. 17 is a developed view of one of the arcuate dies.

Fig. 18 is a developed view of a second arcuate die.

Spaced frame members I8 and II form bearings for an upper shaft l2 which carries an upper die assembly I3, and a lower shaft I4 which carries a lower die assembly I5 and when the work is fed, as hereinafter described, through the rotary die assemblies, it is rolled to shape between the die elements. 1 1

Power is applied to an extension I6 of the upper shaft by suitable driving means (not shown). I Gears 20, and 2I keyed to this shaft drive gears 22 and 23 keyed to shaft'I4. Shaft .l2 also has keyed thereto gears -24 and 25 which drive gears 26 and 21 respectively, which are carried by stub shafts 28 journalled in or secured to the frame members I and I I. i

Gears'26 and 2! drive the work feeding means as follows: Cranks 3| and 32 are rigidly secured to' 'such gears radially thereof. Links 33 and 34, respectively,. are pivotally secured at one end thereof 'to the outer terminals of cranks 3| and 32. The opposite ends of such links are pivotally secured to' an assembly. '35 which includes inwardly movable jaws 36 and 31 carried by slides M and '42which are mounted for such sliding movement in blocks'43 and 44 to which links 33 and 34 are pivoted asaforesaid. The splined keywayarran'gem'ent between slides 4I42 and blocks 43- 44 is shown in Fig. 8. f

The feeding end of the. machine includes a transverse frame member 45 which connects longitudinalframe members 46 and 41. It further includes anupper frame member which connects frame member 45 with a fixed frame member 52. It will be apparent from the foregoing that as gears .26 and 21 rotate, reciprocating motion is imparted to assembly 35 and inward movement of the jaws 3B and 31 toadvanc'e the work during forward movement of the assembly is produced by the following means: Each of blocks 43 and 44 carries a cam 53 which i pivoted thereon at 54, (Fig. 8). As theassembly moves almost to the-limit of its rearward travel the lower ends of cams 53 contact stops 55 carried by frame member 45; This rotates the cams 53 in a counter-clockwise direction when viewed as in Fig. 8 and an upper cam surface 56' acts against adiagonal surface 60 forming part of lower extension 61 of slide 42 (and 4|). This moves the slide inwardly. and further engagement between the inner surface: of cam 53 and-extension 6| retains the block in its inwardposition.

For stock of varying diameters the inward position of jaws 36 and 31 is adjusted by meansof a screw and slot arrangement shown at 62 whereby the'fixed position of the jaw is adjusted inwardly or outwardly on its slide.

Blocks 43 and 44 are provided with tracks II which move in trackways I2 in a central frame member I3.

As the assembly 35 moves forwardly cam 53 4 eventually contacts a cam lifter 64 which is carried at each end of a slide 65. Adjustment of the position of slide 65 and cam lifters 64 is effected by a lead screw 66 operated by a thumb turn 61. Any suitable scale 68 may be used to quickly indicate an adjusted, fixed position of slide 35 which may carry an indicating finger 69.

It will be apparent from the foregoing that as feeding assembly 35 moves rearwardly to its starting position cams 53 engage stops 55 moving the cams in a counter-clockwise direction (Fig. 8) and this cam surface 56 forces extensions 6| of blocks 4| and 42 inwardly. They are retained in this position by the locking effect of the inner surface of cam 53 against the outer surface of extensions BI. Jaws 36 and 31 have previously been adjusted to the width or diameter of the stock. When these jaws move inwardly, thus firmly engaging the stock therebetween, the assembly commences its forward movement and carries the stock in the direction of the rollers for a distance determined by the adjusted position of slide 65 which carries cam lifters 64. When cams 53 contact cam lifters 64 (Fig. 9) the cams are moved in the opposite direction, thus freeing blocks 4! and 42 for outward movement which is effected by springs 59 (Fig. 5). The work is now freed and. the assembly again moves rearwardly to starting position.

If the stock is to be heated before the die forming operation a channel shaped member I5 in the line of travel of the rod is provided with any suitable heating means I4. This channel is movablerearwardly and is swingable from the position shown in Fig. 1 in order to enable die replacementwork to be performed on the lower die assembly I 5. Supporting means for the channel may comprise a hub I6 carried on the lower surface of the channel which also supports a stud II which is receivable in a socket 8| carried by a slide 82 mounted for sliding movement in a frame 83 supported by a bracket I8. The need for this sliding movement of the channel is occasioned by the fact that the channel must be moved longitudinally rearwardly before it can be swung in: an arc. Rollers 84 'facilittate this sliding movement. A rack 85 on the lower surface of slide 82 is engaged by. a pinion 86 keyed to a manually rotatable shaft 81. Thus, when the pinion'is rotated in a counterclockwise direction (Fig. 3) it moves the channel assemblyrearwardly. Shaft 81 may be rotated by apply-. ing a key to a non-circular terminal of shaft 81. Nuts 9I carried by bolts 92 are now loosened. Thesebolts are carried by flange 93 on slide 82, and pass through arcuate slots 94 in such flange. For the purpose of further guiding the work between jaws 36 and 31 and the channelled heater 15 there is an auxiliary frame member I00 hinged at 3 IM o-n transverse frame member 52. The upper surface'of this hinged plate is provided withguide angles I02 and when the heater is-to be retracted plate I00 may be'disengaged from its connection 99 with the channel and be swung downwardly.

The bar stock I04 which has been fed in the foregoing manner is'now arranged to be bent to cause it to overlay the die openings by the bending assembly I65. This assembly is carried on a plate I06 rigidly mounted at the forward end of the heater channel I5 and comprises arcuate jaw members I01 and I08 which are hinged on such plate by means of pins I09 which are mounted in slots IIO, the; slots making it possibl'e'to adjust the location of the pivots.

Means-for moving the jaws inwardly comprise rods 114 and 'I I5 which are connected at I.20 t'o assembly 35 and are arranged to move forwardly as the assembly is so moved. Brackets I23 carrying pirls l-22 aresecured to such rods and such pins are disposed in elongated slots I 2 I in links I2'4and I25. For-the purpose of adjusting brackets I23 relative torods I:I4I I=5 a pin an'd sl'ot connection- I I9 may be used. These-links arepivotally connected at their' forward ends at'IZG to jaws iIIl'I and-I98. The reason for this pin and slot-driving connection between brackets I23 carried'byrods H4 and II5, -and links I24 and I25 is that therods move over a longer stroke than do the links which'c10se the jaws. j

For the purpose'of urging'links I24 and I 25 rearwardly their-rear terminals are connected with springs I secured toa cross-piece I-3I mounted 'on the bottom of channel -'I 5. Any'other suitable means may be'employed 'for retracting links I24'I25.' 7

It will be seen from the "foregoing th'atas rods I I I II5 move forwardly pins I22 reach the for.- ward -ends of slots III and atthi's time linksi I 24- I25 move forwardly-thus causing the jaw parti'ons I32 of members I Ill-I 0 8- tomove inwardly (Fig- 7 'thus bending the stock. On the rearward travel of links -I24I2'5-'the stock is held against'movementby clamping members I33-I 34 pivoted at I'35.- These members have inwardly facin'gserrated edges I3Swhich bite into the stock. They haveupwa-rdly extending slotted fingers I31 which are engaged by cam means 'tto bedescribed which move theclamping members inwardly 'to clamping position.

- Guide blocks I'4I between which the stock passes have pin and slot connections I42 with plate I'Il'6 to move such block's'to anadjusted fixed position. -'These blocks'have forward ex tensions I38 which support the pivot pins, [.35 for the tilamping members; Thus, as guideblocks III are moved inwardly or outwardly 'to accommodate stock'of different widths they carry the clamping -members-inward1y or outwardly. 'Thenumerous adjustments for the parts of this'bending assembly are-necessary in order to accommodate stock-of different widths and also to achieve'the desired angle in the bend. "For. instanceinFig. 7,.jaw member I08 is disposed farther'forwardly than'isjaw'member IUI which bends the-stock in the direction or jaw member III-I. lf' th'e' bend wereto' be in the opposite direction, the "pivot Ij09 {for jaw member IIl'I would be -inovedfurtheriorwardly in its slot Hi) and the other pivot 'pin'would be gmovedrearwardly. v

"The-rotary die arrangement will'now be .described. Upperdie assembly I3 is formed intwo complementary sections I41 and I48 having central recesses I49 to rec'eive the central non-cir-v cular section I50 of shaft I2 and they'are suitably bolted together. "Sections I4'I-I'4'8 have an annular recess I53 which receives one die block I51 having a recess I55 for forming one face of :a scissors partfwh'ic'h is illus'trative only. The block further has spaced recesses I56 on its outer periphery which receive arcuate stops 'I5I for aagain'have centralcomplementary recesses I56 to be received on the-central square section of shaft -I l. The die I61 has "a recess 'I 68 which forms-the opposite face of the-scissors part. arcuate die 'is i also suitably secured' to .the 3 member I154 :in anannular recess -I'II. On-each side of the diesection there 1 are formed recesses I69 which receive stops I51 during rotation ni the assemblies. 'Thus, as the two die assemblies ro-' tate with' the work therebetween the metal-flows into die recesses I55 and I68 and 'suchmetal' is prevented from travelling beyond the opposed edges of the die members due "tothe 'stop n'lembers I51 passing intothe recesses :I-69.- Any-dexcess metal may pass into 'arcuate recesses "I14 formedindie member I54ad'jacent stops-151. I 5

The fsl'otted fingers I-3I are arranged-to move inwardly to exert a clamping action on-the stock afterthe die-forming operation bymeans-titan assembly 'l wshown in detailin Figsl15 and-16 and-"which trails the upper die member'I-M-in th'e short piec'e remains at the end of the stock'su'ch short piece is prevented from falling by a plate I391hingedat14ll. e -,i Ih'e lower die -assenibly I 5 is similarly formed in two complementarysections "I54" and I 6 5 which upper diesassembly I'3.- This assemblyincludes spaced sarcuate "plates I 11 and I'I'B which 'are maintained in their spa'ced relation -by" means of .threaded studs I19 carrying nuts I'Bfloneach side of the plates. The platesare secured to the upper die assembly by means of bolts I8I passing through such plates and also passing" through an arcuatebracket I92 which is secured to the assemblybymeans of bolts 185. The outer periphery ofieachplate has an outwardly offis'et, portion I384 which forms acam 'and'which enters thezrtecessinieach slottedi'finger I31 which moves the finger zoutwardlyit'and accordingly, the serrated Tedge. I 362 at lthe opposite .end thereof, .in-

For. the vpurpo'se ofsriitably guiding the forward. end-.- of :the "material as the "same is compressed jbetweenethe. diezim'embers. an assembly I99 x-isv employed. "This assembly. includes a bracket I191. which is mounted at" the .rear. ter-' minal of a plunger I92 located-in an aperture I913 in afixedframe member I94. Thebracket ism-oved outwardly .by means'of a spring I95 which; acts. against .ashoulder I96 in plunger- I.92. The bracket is further "supported for slid-1, ing movement on frame I'9A' by' tracks I91 which move in trackways I98in the frame. 'Theb-racket. includes a lower wall I 99 and an upperi wall a 200 inspa'ced relation to the lower 1wall. Each and move the same forwardly atthe same speed as the-stock travel-s. 'Ilhus, any tendency of the stock to,;rem ain in either the upper-Dr lower die after'it hasbeen .lforged, is eliminated by these fingers which always retain the stock in astraight line position relative to the :meetlng phase of the twoz'die, members.

.For the purpose 0f retaining the. die openings. I

perfectly clear at all times, upper and lower-roe tary brushes, shown diagrammatically at 206 :and

201 mountedonishafts 208 and 209, respectively;

engage the upper-and lower dies and rotate con.- tinuously during the operation. v 5

The functions and operations of the several parts of the machine havebeen described as this specification has .proceeded'and'its operation as a 'whole will nowibe described. The s'tockis ied between fingers 3'6 and 3'! where'it is grasped and delivered *forwardly to the heating unit "I5 .and upon "forward travelit isfgraspecl between b'end-' ingjaws I 0'! "and I 08 "whereit is bent to assume the contour of the die openings. It is delivered to the die rollers while still hot and upon passing therebetween the-,blank'isforged to shape.

During this operation it is retained against lateral displacement by side walls 151.; The flash also flows into recesses I14 alongside these side walls giving the marginal'edges of the flash a slightlygreater thickness than the intermediate sections so as to facilitate its being handled in the trimming and-punchingmachine of my pending application. r J Knife IBI cuts the blank from, the length of stock; and the forward edge is delivered between fingers 203,'204 of assembly I90.

' While -one form or embodiment of the. invention has been shownand described herein for 11-, lustrative purposes, andgthe construction and arrangementincidental to a specific application thereof have been disclosed and discussed in detail, it is to be understood that theinvention is limited neither to the mere details'or relative arrangement of parts, nor to its specific embojdiment shown herein, butthat extensive deviations; from the illustrated form or. embodiment of the invention may .bemade without departing from the principles thereof What I claim is:

1, A' roller forging machine comprising a frame, a die assembly comprising plural roller die elements journalled in the frame, means for feeding stock to the die assembly, said feeding means comprising'blocks mounted for sliding movement longitudinally, of the frame, inwardly movable slides carried by said blocks and fingers secured to the slides which grip the stock to advance it, driving means for moving the blocks comprising rods operatively connected with the tracting the bending jaws-work holding =jaws which'are inwardly movable to work holding position, and a cam carried-by one of the roller dieelements for operating said latter jaws.

i 2. A roller forging machinecomprising a frame, a die assembly "comprising plural roller dieelements journalled in the frame, means for feeding 'stock'to the dieassembly and means for heating the stock prior to delivery tothe die assembly, said feeding means comprising a support mounted for sliding movement longitudinally of the frame, inwardly movable fingers carried by said support to which grip the stock to advance it, drivingzmeans for moving the'support comprising rods operatively connected with the rotata'ble die assembly, means for bending the stock to assume the contour of-the die elements comprising plural jaw elements mounted on the frame; rods connected with the support which are also operatively connected'with the jaws to move them inwardly for the bending operation, work holding jaws which 'areinwardly movable tofworkholdingfl position, a cam carried by one ofthe roller die elements "to operate said latter jaws,v and a longitudinally movable assembly 8 provided with fingers to receive the blank, as it emerges from the die elements and guide the Same, .7 3.. A :roller forging machine -comprising a frame, a die assemblycomprising plural roller die elements journalled in the frame, means, for

feeding stock to the die assembly, Said feeding means comprising plural blocks mounted for sliding movement longitudinally of the frame, inwardly movable slides carried by said blocks and fingers securedto theslides which grip the stockto advance it, driving means for moving the blocks comprising rods operatively connected with the rotatable die assembly, means for bending the stock to assume the contour of the die elements comprising plural jaw elements mounted on the frame," rods connected withthe blocks which are also operatively connected with the jaws to move them inwardly for thebending operation, work holding jaws which are inwardly movable, and cam means for moving said jaws to work holding position. v i I I 4. A roller forging machine comprising a frame, a die assembly comprising-plural roller die elements journalled in the frame, means for feeding stock to the die as sen1bly and means for bending. the stock to assume the contour of the die elements comprising plural jaw elements mounted on the frame, driving means connected with the jaws to move them inwardly for the bending operation, work holding jaws which are inwardly movable to hold the work, cam means, carried by one of said roller die elements to move said jaws to workxholding DOsition,-anda longitudinally movable assembly provided with fingers to receive the blank as it emerges from the dies and guide the same. 5. A roller forging machine comprisinga frame, a die assemblyv comprising plural-roller die elements journalled in the frame, means for feedingstock to the die assembly and means for heating the stock: priorvto delivery to the die assembly, said feeding means comprising plural blocks mounted for sliding movement longitudinally of the frame, inwardly movable fingers carried bysaidblocks which grip the stock to advance it, driving means for moving the blocks, a knife carried by one of said die elements for severing a length of the stock, the heating means including a channel through which the stock moves and provided with a heating element, a longitudinally movable assembly mounted on the frame and upon which the channelis secured, a stud on the channelpassing through anopening' in said assembly'topermit rotation 'of the chapnel when it has been moved in the direction of the feedingmeans, means for bending the stock toassume the contourof. the dieelements comprising plural jaw elements mounted on the frame, rods connected with the. blocks which are also operatively connected with the jaws to move them mwardly for thebending operation, upon forward movement of the blocks, work holding awswhich' are. inwardly movable during the severing operation, and earn means for movin said jaws to work. holding position. a

6. A roller forgingmachine comprising a frame, a die assembly comprising plural roller d e elements journalled in the3frame,'means for, feeding stock to thedie assembly and means for heating the stock prior to deliveryj to the die assembly, the heating means including an 61011? gated channel mounted on the j frame and through which the stock'meves, and a heating fi l lf w h the c ann me n bending the stock to assume the contour of the die elements comprising plural jaw elements pivoted on the frame, means for adjusting the pivotal position of the jaw elements to vary the bending action of such jaw elements, work holding jaws which are inwardly movable to work holding position, a cam for so moving the latter jaws, to restrain travel of the work, and a longitudinally movable assembly provided with fingers to receive the blank as it emerges from the dies and guide the same.

7. A roller forging machine comprising a frame, a die assembly comprising plural roller die elements journalled in the frame, means for feeding stock to the die assembly and means for heating the stock prior to delivery to the die assembly, said feeding means comprising plural blocks mounted for sliding movement longitudinally of the frame, inwardly movable slides carried by said blocks and fingers secured to the slides which grip the stock to advance it, driving means for moving the blocks comprising rods operatively connected with the rotatable die assembly, the heating means including a channel through which the stock moves and provided with a heating element, means for bending the stock to assume the contour of the die elements comprising plural jaw elements mounted on the frame, rods connected with the blocks which are also operatively connected with the jaws to move them inwardly for the bending operation, work holding jaws which are inwardly movable, cam means carried by one of the roller'die elements for moving said jaws to work holding position, the roller die elements having complemental matrix grooves for forming the blanks, one of such die elements being provided with side walls which limit lateral fiow of the metal, the other die element having recesses to receive said side walls during rotation, and a longitudinally movable assembly provided with fingers to receive the blank as it emerges from the dies and guide the same.

8. A roller forging machine comprising an elongated frame, a die assembly comprising a plurality of roller die elements journalled in the frame, the frame including means for supporting stock as it is fed to the die assembly, a knife positioned adjacent the trailing edge of one of the die elements for cutting a length of the stock after it has been formed between the die elements, work holding jaws which are inwardly movable to grasp the stock during the cutting operation, a cam carried by one of the die elements for moving said jaws to work holding position, and a longitudinally movable assembly provided with fingers to receive a formed blank as it emerges from the die elements and guide the same.

JACOB GAVURIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Kelleher Aug. 25,

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