US2159901A - Metalworking machine - Google Patents

Description

F. H. LE'JEUNE 24,159,901

METALwoRKING MACHINE Filed Feb. 15, 1937 (Sheets-shet J' May 23, 1939.

May 23, 1939.y F; H. LE JEUNE METALwoRKING MACHINE Fiied Feb. 15, `1937 4 sheets-sheet 2 INVENTOR.

Hank, LeJeune.

ATTORNEY May 23,1939- F. H. LE JEUNE 2,159,901

METALWORKING MACHINE Filed-Feb. 15, 1937 4 sheets-sheet s i INVENTOR. BY Frctk-'e e ue May 23, 1939 F. H. I E .JEUNE K 2,159,901

METALWORK-ING MACHINE INVENTOR.

E; rnn HLeJeune Patented May 23,1939 r Y l 2,159,901?

UNITED STATES gPATENT oFFleE,

METALWORKING MACHINE Frank H. Le Jeune, Detroit, Mich., assig'nor to Kelsey-Hayes Wheel Company, Detroit, Mich., a corporation of Delaware Application February 15, 1937, Serial No. 125,866

16 Claims. (Cl. 153-48) This invention relates generally to metal workmade more apparent as this description proing machines and refers more particularly to ceeds, especially when considered in connection apparatus for forming cupped elements from with the accompanying drawings, wherein: sheet metal blanks. Figure 1 is a sectional View through the appa- One of the principal ob-jects of this invention ratus showing the several parts thereof'in the 5 consists in the provision of apparatus of. the positions the same assume just before the ram character set forth requiring less material power reaches its upwardmost position; to form relatively deep-cupped elements from Figure 2 is a sectional View similar to Figure 'i sheet metal blanks and capable of more expeshowing the parts in an intermediate position;

diently and economically forming cupped ele- Figure 3 is a sectional View illustrating the 10: ments with less waste resulting from tearing or parts in the position the same assume upon wrinkling of the metal during the drawing opercompletion of the forming operation; ation employed in the past. In accordance with Figure 4 is a sectional View taken substantially this invention, provision is made in the appaon the line 4-4 of Figure 2;

l5 ratus for fashioning a cupped element from a Figure 5 is an enlarged sectional view through 15. pre-formed annulus byk merely turning one end the fluid pressure controlling valve for the pad of the annulus inwardly and by maintaining the of the die; and metal under compression as it is turned in- Figure- 6 is a perspective View of an annular wardly. This renders it possible to more expeblank of the type fashioned by the machine to diently form cupped elements of greater depth form a cupped element. 20 without Wrinkling or otherwise deforming the In general, the machine forming the subject metal. matter of this invention is in the form of a With the above in view, the present invenpress having a vertically reciprocable ram IU and tion contemplates apparatus including a die hava punch Il .secured to the ram for movement as ing a portion adapted to receive one end of a a unit therewith. The lower end of the punch II tubular blank and having an inwardly curved cooperates with a ldie I2 to curl the lower end portion eifective upon movement of the blank of the annular blank A in Figure 6 to the contoward the die to` flare said end of the blank intour shown in Figure 3. 'Ihe die l2 comprises wardly. In the present instance, the blank is a ring I3 and a pad I l supported for reciprocainitially yieldably urged toward the die by a tion relative to the ring I3 on the axis of the 30A member engageable with the edge of the blank ram I0. Upon reference to-Figure 3, it will be opposite the endto be formed and is subsequentnoted that when the pad Il! is in its lowermost 1y `DOStiVey4 mOVcd toward the .die by 2 punch position, the top surface thereof forms a conmovable into the blank to prevent deformation tinuation of the inner side wall surfaces of the of the latter during the forming operation. ring or die section i3, and when raised through 35V Another advantageous feature of this inventhe die ring I3 to the position thereof shown in tion resides in the provision of apparatus of the Figure 1, it ejects or lifts the finished product above type wherein the side walls of the die to a position above the die I2, where it may be have a sliding t with the exterior surface of the conveniently pushed out of the machine by the blank and wherein the dimension of the punch is operator. After the finished product has been 40 such as to have a sliding fit with the interior removed from the machine, another annular.-

' surfacevof the blank. v blank A is placed over the pad I4 while lthe lat- A furl/hel" Object 0f this inVeIll'fOn Consists in ter is in its raised position and the-lower end of the provision of apparatus wherein the member the blank is piloted into the die section I3 by the acting on the blank to move the latter toward outwardly flared upper end of the die. The arthe die also serves to strip the blank from the rangement is such that when the ram is again punch upon initial return mo'vement of the moved* downwardly, the inwardly curved lower latter. end of the punch enters the upper end of the VStill another feature of the invention consists' blank and a yielding pressure is exerted on the in the provision ofasectional die having one secupper edge of. the blank tending to move the 50; tion forreceiving the blank and having another latter downwardly into the die. The yieldingv section in the form of a pad movable in timed pressure is exerted by the stripper I5, to be presrelation to the stripping operation to eject the ently described, and initially serves tocooperateV completed article from the rst die section. with the punch in aligning .the blank with the,

The foregoing, as wellas other objects, Willr bcA die.-k In this connection, it will be vnoted thatthe 55.

internal diameter of the annular surface of the ring I3 approximates the external diameter oi the blank so as to have a sliding fit therewith, and the outside diameter of the punch II approximates the inside diameter of the blank in order to cooperate with the ring I3 in eiectively holding the blank from deformation during the forming operation.

In order to prevent the cupped element from adhering to the punch I I upon upward movement of the latter by they ram Ill, provision is made for stripping the cupped element from the punch as soon as the ram Il] starts its return movement. The stripper is designated generally in the several views by the reference character I5 and is shown in Figures 1 toy 4, inclusive, as being interposed between the ram I3 and die I2. Briefly described, the stripper comprises a spider I6 and a ring II concentrically disposed with respect to the axis of reciprocation of the punch II. The spider is shown in Figure 3 as positioned directly above the punch I I and as having circumferentially spaced depending projections secured to the ring I1 to provide a unitary construction.

As will presently be set forth, the spider together with the ring are supported in the assembly for vertical movement relative to the punch II and the internal diameter of the ring I'Iy is predetermined to slidably receive the punch. In view of the fact that the punch is adapted to slide into the upper end of the blank A, it follows that the stripper ring I1 abuts the upper edge of the blank. In the present instance, a constant yielding pressure is exerted on the spider I6 tending to move the blank into the die I3 with the punch, and this pressure is subsequently replaced by positive engagement of the ram with the stripper ring so that continued downward movement of the'ram eifects a corresponding movement of the blank into the die as a unit with the punch.

Upon reference to Figure l, it will be noted that the ring Il is normally held in its lowermost position relative to the punch by means of a plurality of uid pressure cylinders 23 acting upon the upper end and of a pin 23 having the lower end thereof engageable with the spider I5 of the stripper. per is capable of vertical movement relative to the punch and for accomplishing this result the stripper is connected to the ram through the medium of a lost motion connection. This connection is shown in Figure 3 as comprising a ring 25 secured to the underside of the ram' I0 in concentric relation to the stripper ring Il and slidably engaging the outer surface of the latter.

The bottom of the ring 25 is provided with an inwardly extending annular projection 25 engageable with an outwardly extending annular shoulder I1 on the stripper ring II tofraise the stripper` I5 with the ram Ill, subsequent to the strippingoperation. In this connection, it is to be noted that the stripper is raised. by the ram against the action of the fluid pressure in the cylinders 23 and, for this reason, a fluid is selected which is compressible.

With the brief description of the machine noted above, it will be apparent that an annular blank A to-be cupped is placed over the pad I4 when the latter is in its raised position Vshown in Figure 1. As the ram continues to move upwardly from the position shown in Figure 1, the pad Ill is returned to its lowermost position in cooperative relation to the die ring I3 by means of a fluid actuated piston controlled by a valve As indicated above, however, the strip- 23 shown in Figure l as being actuated by a cam 'and initial movement in this direction causes the rounded lower end of the punch II to move into the upper end of the blank A. At approximately the same time the stripper ring I'Il engages the upper edge of the blank and positions the latter in the die. As the punch I I progresses downwardly toward the die I2, the stripper ring I'I exerts a pressure on the upper end of the blank A and telescopes the lower end of the blank into the die. It will, of course, be understood that the pressure exerted upon the upper edge of the blank depends upon the constant pressure in the cylinders 23 and this pressure acting throughrthe stripper ring I'I causes the lower end of the blank to nare inwardly in accordance with the curvature of the die I2. As the resistance to downward movement oi the blank A by the stripper ring Il exceeds the pressure acting on the stripper ring, the punch II continues to move downwardly, relative to the stripper ring, in sliding Contact with the inner surface of the blank A until the upper surface 30 of the stripper ring contacts with the bottom surface 3I of the punch holder 32, whereupon continued downward movement of the punch effects -a corresponding downward movement of the stripper ring to complete the forming operation. During this forming operation the curved 'surface of the die maintains the metal of the blank under compression and wrinkling of the metal is avoided.

When the forming operation is completed, the punch II is raised by the ram I0 relative to the stripper ring I'I until the inwardly extending projection 25 on the ring 25 of the ram engages with the annular shoulder II' on the stripper ring, whereupon the latter is raised as a unit with the ram. It is to be noted, however, that during initial upward movement of the punch II relative to the stripper ring I1, the latter functions to strip the cupped element from the punch Il, so that this cupped element is retained in the die I2.

Upon completion of the stripping operation, the valve 26 is actuated by the cam 21 toV raise the pad I4 through the medium of the fluid pressure cylinder 28. As the pad I4 is raised, the same ejects the cupped element from the die I2 and permits the cupped element to be pushed out of the press by the operator.V Another annular blank A may then be immediately positioned around the pad in the die I2 and the foregoing operation repeated.

Having described in general the operation of the press, reference will now be made more particularly to the construction of the several parts involved. In'detail, the press briefly described above comprises a casting 33 supported in any Vsuitable manner on aV bolster plate 33 and having diametrically opposed upwardly extending guide pins 34 adapted to slide in bushings 35 secured in a bore 35S inthe punch holder 32. The arrangement is such as to accurately guide the punch plate 32 throughout movement thereof and to insure proper registration of the punch II with the die I2. UponV reference to Figure 3, it will be noted that theftop surface of the casting 33 is recessed, vas at 35, to receive the lower end of the die section I3 and thereby accurately positions this die section relative to the punch ll. Inthe present instancethe die section I3 is secured to the casting 33 in the recess 3 6 by means of studs 3l and is .provided with `an open- -ing 38 in the center thereof aligned with a similar opening 39 through the casting 33.

The pad I4 is supported inthe aligned openings aforesaid by means of the fluid pressure cylinder 21 carried by the bolster plate 33 and the upper end of the pad has a hardened plate 40 secured thereto for cooperation with the annular section I3 to form the die I2. The pad I4 is positioned with the plate 40 forming a continuation of Ythe inner surface of the die I2 by engagement of the lower end 4I of the pad with kconnecting rod 4.2.

in a vertical cylinder 44 secured in any suitable manner to the underside of the bolster plate 33.

AThecylinder is of the double-acting type having the lower end communicating with a conduit 45 and having the upper end communicating with a conduit 46. The conduits, in turn, alternately communicate with a uid pressure supply line 41 through the medium of the valve 23, shown in detail in Figure 5. This valve is of the twoway piston vtype having a cylinder 48 and having a piston 49 normally urged to its forwardmost position by means of a spring 5I). The piston is ported and in its forwardmost position establishes communication from the supply line 41 to theconduit 46 through the port 5I in the piston. Also, in the above mentioned position of the Yvalved piston 49, the exhaust port 52 in the piston communicates with the conduit 45 so that as uid pressure is discharged into the upper end of the cylinder 44 from the conduit 45, the iuid pressure below the piston is exhausted through thek conduit 45.V This permits the pad to assume its lowermost position shown in Figure 3, wherein the hardened,v plate 4G cooperates with the die ring I3 to form the die'l2.

The valved -piston 49 is moved rearwardly against the action of the spring 59 by means of the cam 21 secured to the punch holder 32 in the manner clearly illustrated in Figure 3. The arrangement is such that when the punch holder 32 is moved upwardly bythe ram, the valved piston 49 is moved rearwardly by the cam 21 to a position wherein communication is established between the supply conduit 41 and the conduit 45 through another port 53 in the piston. At the time the port 53 in the piston communicates with the conduit 45, the exhaust port 54 in the piston communicates with the conduit 45 so that as fluid under pressure is admitted to the cylinder 44 at the underside of the piston to raise the pad, the fluid in the cylinder 44y above the piston is exhausted. The valved piston is maintained in the latter position by the cam 21 until this cam is moved by the ram to a position above the valve actuator 55, whereupon the valved piston 49 is actuated by the spring 59 to return the pad I4 to its lowerrnost position with respect to the die I2. In this connection, it is tov be noted that when the ram 1I@ is moved downwardly, the cam 21 is rendered inoperative to actuate the valve 26 and, asa consequence, the lowermost Upon reference to Figure, it will be noted that the long axes of the slots 59l are substantially parallel to the upper cam face 58 on the cam 21 and are substantially normal to the lower cam face 59 on the cam 21. As a consequence, when the punch holder is raised from its lowermost position, shown in Figure 3, a sufficient distance to engage the valve actuator 55 with the upper face58 on the cam 21, the force tending to move the cam 21 inwardly, instead of actuating the valved lpiston 49, is taken directly against the pins 51, with the result that kthe cam 2'! retains its outermost position and the valved piston 49 moves against the action of the spring 53. On the other hand, when the valve actuator 55 is in contact with the lower cam face 59 on the cam 21, downward movement of the punch holder 32 exerts a force on the cam in the direc-- tion of the long axes of the slots and merely slides the cam 21 inwardly, without disturbing the forwardmo-st position of the valved piston 49.

The ram `I comprises a vertically reciprocable member 69 driven in any suitable manner and connected to the punch holder 32 by means of a punch head 6I. Upon reference to the several figures, it will be noted that the underside of the punch holder 32 is formed with a recess 62 therein having angularly spaced depending projections 54 abutting the to-p surface of the punch I I and secured to the latter by means of the stud bolts 55. Thus, the punch II, holder 32, and head 6I move as a unit with the ram.

The punch I I comprises an annular body member 55 and a plate GS secured to the upper surface of the body member by means of the studs 91. The external diameter of the punch is such as to have a sliding t in the blank A, and the lower end of the body sec-tion 55 is fashioned to correspond to the contour of the die I2 so as to cooperate with the latter in forming the cupped portion at the lower end of the blank.

The stripper I comprises a spider I6 located in the recess 62 of the punch holder and having the arms thereof extending between the angularly spaced depending projections 64 on the punch holder. The free ends of the spider are formed with depending projections $9 adapted to abut the top surface of the stripper ring I1 and to be secured to the latter by means of the studs 16. The stripper ring I1 is concentrically disposed with respect to the punch Il and the internal diameter thereof is such as to slidably engage the side walls of the punch. Upon reference to Figure 3, it will be noted that the stripper ring I1 is disposed between the underside of the punch holder 32 and the top surface of the die section I3, and is normally urged in. a direction toward the die I2 by means of uid under a constant pressure acting through the cylinders 23. In detail, the cylinders 23 are supported in a vertical position on the head 6I at diametrically opposite sides of the latter and the lower ends of the cylinders are interconnected by means of a link 1I extending through a vertically elon gated slot 12 in the head 5I. Also, the lower ends of each cylinder communicate with the fluid pressure supply line 41 through the medium of flexible conduits 13, and the piston 14 in each cylinder is xed to the head by means of a vertical rod v extending through the upper end of the cylinder. Thus,` it will be noted that the pressure of the fluid at the undersides of the Xed pistons in the cylinders 23 tend to move the latter in a downward direction and this movement is transferred to the spider `I6 by means of the rod .24

mounted for vertical sliding movement on thek axis of the punch in a bore formed inl the punch holder 32. As shown in Figure 3, the upper end of `the `rnd bears against the .link 'H intermediate the ends of the latter and the lower end of the rod has a bearing engagement with the central portion of the spider, tending to move the latter in a downward direction. Inasmuch as the stripper ring Il is secured to the spider as a unit therewith, it follows that this ring is urged toward the die l2 by the fluid under pressure admitted to the cylinders 23.

The extent of downward movement of the` stripper is determined by `means of the ring 25 secured to the underside of the punch holder 32 by means of the stud bolts Tl and having the lower end extending laterally inwardly to provide the projection 25. As previously stated, the projection 25' cooperates with an annular shoulder l1 on the stripper ringll to hold the latter in assembled relation with the ram.

It will be noted from the foregoing that when the ram is in its uppermost position shown in Figure l, the annular shoulder l1 on the stripper ring Il is maintained into engagement with the inwardly extending projection 25 on the ring 25 by the action of the fluid in the air cylinders 23. Consequently, the stripper I moves downwardly as a unit with the ram into abutting engagement with the upper edge of the sheet metal blank A and continues this movement until the pressure of engagement of the lower end of the blank with the arcuate section of the die l2 exceeds the constant pressure acting on the stripper throughV the air cylinders 23. When this condition exists, the punch continues to move downwardlyV into the blank relative to the stripper until the ring Il abuts the undersurface 3l of the punch holder `32, whereupon the blank is positively moved downwardly around the arcuate surface of the die. It will, of course, be understood that at the same time the punch Il is being moved downwardly and serves to prevent deformation of the blank during the forming operation. i

It is believed that the operation of the press is clearly set forth in the general description of the apparatus contained in the introductory section of the specification and, accordingly,.this operation will not be repeated at this time. It may be pointed out, however, that the apparatus requires a relatively small amount of power to fashion the blank to the cup-shaped contour illustrated in the drawings, and also offers the pos-I sibility of forming relatively deep cupped elements without tearing, or otherwise marring the blank. As a consequence, the present invention not only provides for appreciably` reducingthe size of the apparatus required to form relatively deep cupped elements from sheet metal, but also materially reduces the amount of waste.

What I claim as4 my invention is:

1. In a metal working machine, a die provided with a portion slidably receiving one end of a tubular blank and having an inwardly curved portion for flaring said end ofthe blank inwardly, j

a member movable toward the die and slidably engageable with the inner surface of the blank to cooperate with the rst named portion of the die to eifectively support the side walls ofV the blank therebetween, and means effective upon initial movement of the member toward the die to exert a yielding pressure on the blank sufficient to slide the rst named end of the blank into the die toward the curved portion of the die and effective uponV continued movement o the member toward the die to positively move -the blank in said direction to flare the end of the blank along the curved portion .of the die.

2. In a metal working machine, a die provided with a portion slidably receiving one end portion of a tubular blankand having an inwardly'curved portion for flaring said end of the blank inwardly, a punch movable toward the die and slidably engageable with the inner surface of the blank to cooperate with the first named portion of the die to eifectively support the cylindrical side walls of the blank therebetween, a member surrounding the punch and engageable with the edge of' the blank opposite the end aforesaid thereof, and compressible means acting upon said member tending to' move the blank into the die toward the curved portion of the latter.

3. In a metal working machine, a die provided with a portion slidably receiving one end of a Vtubular blank and having an inwardly curved portion for flaring said end of the blank inwardly, a punch movable toward the die and slidably engageable with the inner surface of the blank, a member supported for movement relative to the punch and surrounding said punch for engagement with the edge of the blank opposite the end of thei latter aforesaid, compressible means acting upon said member tending to move the blank into the die toward the curved end portion of the latter, and means effective when the punch has been moved to a predetermined position within the blank for positively moving said member in a direction to move the end aforesaid of the blank along the curved portion of the die.

4. In a metal working machine, a die having a portion adapted to receive one end of a tubular blank and having an inwardly curved portion for haring said end of the blank inwardly, a punch movable toward the die and into the opposite end of the blank, a member supported for movement relative to the punch ,andV sur,- rounding the latter for abutting engagement with the edge of the last namedV end'of said blank, and compressible means eifective upon movement of the punch in a direction toward the die to exert a pressure on said member tending to move the tubular blank into the die toward the curved portion thereof.

5. In a metal working machine, a die having a portion adapted to receive o ne end of a tubular blank and having an inwardly curved portion for aring said end of the blank inwardly,v a punch movable toward the die `and into the opposite end of the blank, a member supported for move- Vmentrelative` to the punch and surrounding the latter for abutting engagement with the edge of the last named end of said blank, and compressible means effective upon movement of the punch in the aforesaid direction to exert a pressure on said member tending to move the tubular blank into the die toward the curved portion thereof, said compressible means effective to hold said member against movement with the punch upon return movement of the latter, whereby the-blank is stripped from the punch by said member. Y

6. In a metalworking machine, a die having aY portion receiving one end of a tubular blank and having Van inwardly curved portion Vfor ilaring said end of the blank inwardly, a punch movable towardV and away from the die and dimensioned to extend into the tubular blank, a ring supported for movement relative to the punch and surrounding the'latter for Vengagement with the edgev of the tubular blank opposite the end aforesaid thereof, compressible means effective upon initial movement of the punch into Athe blank to exert a pressure on the ring tending' to move the b-lank into the die toward the curved portion thereof, means effective upon continued movement of the punch into the blank to positively move the ring with the punch and cause a corresponding movement of the blank into the die, vsaid compressible means also operable to hold the ring into engagement with the blank upon return movement of the punch to strip the blank from the punch, and means effective upon completion of the'stripping operation to move the ring as a unit with the punch.

7. In a metal working machine, a die having a portion adapted to receive one end of a tubular blank and having an inwardly curved portion for flaring said end of the blank inwardly, a punchmovabletow-ard the die into the tubular blank, a ram for actuating the punch, a member surrounding the punch and engageable with the edge of the blank opposite the end aforesaid thereof, a lost motion connection between said member and ram permitting relative movement of the member and punch, and compressible means exerting a pressure on said member in a direction 'toward the die.

8. In a metal working machine, a vdie having a portion adapted to receive one end of a tubular blank and having an inwardly curved portion for flaring said end of the blank inwardly, a punch movable toward the die into the opposite end of the blank and movable in the opposite' Vdirection away from the die, means effective upon initial movement of the punch into the blank to engage the edge ofthe last named end of said blank, compressible means acting on said means to urge the blank into the die in a direction toward the inwardly curved portion of said die and effective upon return movement of the punch to strip the blank from said punch, and means operating in timed relation to the stripping operation to eject the blank from the die.

9. In a metal working machine, a die having a portion adapted to receive one end of a tubular blank and having an inwardly curved portion for flaring said end of the blank inwardly, a punch movable toward the die into the opposite end of the blank and movable in thejopposite direction away from said die, means effective upon movement of the punch into the blank to engage the edge of the last named end of the blank, compressible means acting upon the above named means to urge the blank into the die with said punch and effective upon return movement of the punch to eject the blank from said punch, and fluid pressure actuated means responsive to return movement of the punch to eject the blank from the die after the stripping operation.

10. In a metal working machine, a die having a portion adapted to receive one end of a tubular blank and having an inwardly curved portion for aring said end of the blank inwardly, a punch movable toward the die into the opposite end of the blank and also movable in the opposite direction away from the die, a stripper ring surrounding the punch and engageable with the edge of the blank opposite the end aforesaid thereof,

compressible means acting on the stripper ring to urge the blank into the die with the punch and effective upon initial return movement of the punch to strip the blank froin said punch, means movable as a unit with the punch and engageable with the stripper ring subsequent to the stripping operation to return said ring with the punch, and means operating in timed relation to return movement of the stripper ring to eject the blank from the die.

11. In a'metal working machine, a die section having side walls adapted to slidably receive one end of a tubular blank and curved inwardly to flare said end of the blank, a cooperating die section supported in an opening in the die sectiony aforesaid to form a continuation of the inner surfaces of the side walls of said die section, a punch movable toward the die into the tubular blank and also movable away from the die, means effective upon movement of the die into the blank to exert a pressure on the edge of the blank opposite the end aforesaidand to move said blank into the die with the punch, and means effective upon return movement of said punch to move the second die section into the first die section to eject the blank from the latter die section.

12. In a metal working machine, a die having a recess therein provided with an annular inner side wall surface curved inwardly at the base of the die, said inner side wall surface of the die having a diameter approximating the external diameter of a tubular blank and adapted to slidably receive one end of the blank, a punch movable toward the die into the opposite end of the blank and having an external diameter predetermined to slidably flt the inner surface of the blank, and means operating in timed relation to movement of the punch into the blank to exert a yielding pressure on the edge of the blank opposite the rst named end thereof tending to force the blank into the die and to` subsequently positively move said blank with the punch with a force suicient to flare the first named end of the blank inwardly on the curved surface of the die.

13. In a metal working machine, a die having a recess for receiving one end of a tubular blank and having an inwardly curved portion for flaring said end of the blank inwardly, a punch holder movable toward and away from the ldie and having a recess in the surface thereof opposite the die, a punch positioned between the recess in the punch holder and the die for movement into the end of the blank opposite the'end aforesaid, means for securing the punch to the holder to effect movement of the punch as a unit with the holder, a member supported in the recess of a punch holder for limited movement relative to the holder and punch, compressible means normally urging said member` in a direction toward the die, and means carried by said member and engageable with the edge of the blank opposite the first named end of the latter.

14. In a metal working machine, a die having a-recess for receiving one end of a tubular blank and having an inwardly curved portion for flarmovable toward the die into the opposite end of the tubular blank, and means operating in timed relation to movement of said member into the blank to move the said end portion of the blank along the curved portion of the die, said die and member havingannular surfaces cooperating to frictionally engage the inner and outer surfaces of the blank beyond the flared end of the latter to hold the blank against deformation during the operation of the curved portion of the die to flare said end of the blank.

15. In a metal working machine, a die provided with an annular surface telescopically receiving one end portion of a tubular blank with the outer surface of the latter end portion of the blank in friotional contacting relation With the annular surface of the die and having an inwardly curved portion for flaring said end of the blank inwardly, a member movable into the opposite end of the blank in a direction toward the die and having an annular surface frictionally engaging the inner surface of the blank to cooperate with the annular surface of the die to rmly hold'the side Wall of the blank to its original diameter during the operation of the curved portion of the die to flare the end aforesaid of the blank inwardly, yieldable means responsive to initial movement of the member into the blank to engage the edge of the second named end of the'blank and urge the blank along the annular surface of the die toward the curved portion of the latter, and means operating when the side walls of the blank are effectively engaged by the annularsurfaces` of. the die and member to. positively` move the blank inthe aforesaid direction Withrsufoient force to cause the first named end of the b lank to move along the curved portion of the die,

16. In a metal Working machine, a die prnvided with av portion s lidably receiving one end portion of a tubular blank and having an inwardly curved portion for iaringv said end of the blank inwardly, means for moving said blank in a direction toward the curved portion of the die tov flare the end aforesaid inwardly, and means movable into the opposite end of the blank in engagement with the side Walls,A of the latter to cooperate with the first named portion oftrie,- d ie to maintain the tubular side Walls of the blank cylindrical during the upsetting ofV the metal by-saidflaring means.

FRANK I-I. LE JEUNE.

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