US1689784A - Process of forming annular plates - Google Patents

Description

F. R. KLAUS PROCESS OF FORMING ANNULAR PLATES Filed D60. 15, 1924 2 Sheets-Sheet 1 Hal.

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F. R. KLAUS PROCESS OF FORMING ANNULAR PLATES Filed Dec. 15, 1924 2 Sheets-Sheet 2 nuaukw Patented Oct. 30, 1928.

UNITED; STATESIPFAATENT OFFICE.

FRED R."KLAUS, or WARREN, OHIO, ASSIGNOR To THE. AMERICAN WELD'IIiT G AND ,MANUFACTURING COMPANY, OF'WAR-IREN, OHIO, A CORPORATION OF OHIO.

rnoonss or FQRMING ANNULAR PLATES.

Application filed December 15,1924. Serial Nb. 755,924. y

of cylindrical or substantially cylindrical form, the invention being particularly applicable to the production of retaining rings used in connectionwith automobile wheel rims although obviously not limited to the productionot this particular article:

It is an object of the present invention to provide a method by which a metal ring or annulus can be produced by simple press operations at a very low cost.

erformin the o erations necessary to convert a cylindrical ring into a fiat ring or a claims together with such variations and modifications thereof as is apparent to'one skilled in the art to which the invention appertains.

Reference should behad to the accompanying drawings forming a part of this specification in which Fig. 1"is a sectional view showing the blankin the 'form of a cylindrical metal band from which the flat ring is formed.

Fig. 2 is a" sectional view showing [the .blank after the first operation.

Fig. 3 is a sectional vlew showing the...

final operation.

Fig dis a vertical axial section-through; the double press showing. the dies: in open: position,

fiat ring after the second and.

a cylindrical blank between the upper pair of dies and a partially'formed blank between the lower pair of dies. Fig. 5,is a section similar .to Fig. 4 show ing the press members'in closed position.

Referring to the accompanying drawings Figs. 1; 2 and 3, show t'hecylindrical blank A, the partially formed conical blank B and tlie substantially jflat ring Of which is the final product in any desired manner, as by r10lling a flat strip of the desired cross sectional dimensions to cylindrical form and welding/the ends together. The crosssectional shape of the stofk' from which the band isj formed A further object is to provide a press capable of drawings, hereinafter described "drical blank A and the flat'ring C being suitably formed dies." "Fig' l and5 show a The blank i is a sub'stan tially cylindrical band which may be formed.

may varfiy considerably depending on the cross section dimensions desired-inth'e final hroduct; y

My invention is applicable to bandsor annular members substantially cylindrical in form where it is desired to turn a portion or flange oi the band which is substantially 'p'arallelto the axis thereofto a considerable angle such as 909 so that the flangeextends substantially at right angles to the axis of the axisof the cylinder. a a I In order to illustrate my invention I have;

shown by way of example a cylindrical band A in which the entire band is rotatedso that it'lies substantially at right angles to the axis.

The cylindrical blank A is converted into the fiat ring (1 intwo press operations; the

blank -A being forced into conical form shown in Fig. 2 by means of a coneshaped plunger die which is forced into the cylinfo'rmed from the conical blank B bya second press'operation in which the conical blank B is flattened between a second pair of 'hydraulicpress' de signed to perform the two forming operations simultaneously upon .two' different rings. The press has a fined base 1 at the center of whichthere is provided a cylinder 2 with a vertically movable piston 3, the;

cylindrical 2 being connected to a source of fluid'under pressure by an inlet pipe 1 and controlled by a suitable valve 5 by which the cylinder may be "connected either to the inlet pipe 4 or to an exhaust pipe 6.

, A series of vertical tie rods "-7 are rlgid lyf attached to the base 1 and extend upwardly therefrom, the rods '7 having rigidly secured :,tliereon at their upper ends a bed puree. The piston 3, has an enlarged head 10 at its upper end which rests upon the base 1 when; 7 the piston is in its'lowermost position and .attached. to, the head 10 is a plate llfwhich has openings througliwhich the tie rods 7 extend, the plate 11 being movable with the piston 3 and slidable on the tie rods Slid ably mounted on the tie rods 7 betweentheandmovable plates 9andi11 is-an in termediate plate 12 the dow'nwardfmover'nent of which is limited bystop pinsf13 on the The intermediate plate l2'has rigrods 7.

idly secured to the upper. sidefthereof a the the die '14 for insertion of one of thecylindrical blanks A.

The plate 11 carried by. thepiston ,3 has a die secured upon its upper face and this die 15 is formedwith a recess 16 of v somewhat greater diameter than the larger end of the conical blank B the bottompf the ,recess 16 being conical and -tapering downwardly at a small angle from the cir- 1 =cumferenti-al shoulder 17 to the center of the bla'nk A engages with the the recess. The bottom 18 of the interim diate plate 12 is v conical in :form tapering downwardly to, the center thereof at the same angle as thGdbOttOmOf the recess 16. i

The pins 13 are so located that when the piston 3 isingits lowermost position the plate 12 is supported at a suflicient distance above the die 15 to'permit a blanlcli to be insert in the recess .16 of the die.

To convert the cylindrical blank A into the fiat ring Cthe blank is acted upon successively betweenithe dies l l and 9 and 15 and 12. The blank A'isfirst placed upon the conical die 14: as shown. in Fig.- 4, pressure is admitted to the cylinder 2to move the :plstoll 3 upwardly, raising the plate 11- into engagement "with the interme diate ';pla te Hand-carrying the plate 12 upwardly until.

the fixed plate 9, whereupon the conical plunger (116114 is forced {into the cylindrical blank-A which stretches the same and rotates the flange partially toward the axis of the ring so that the part acted on by the die assumes a conical form as shown at '13..

The blank 7 B formed by the'operation above described then placed upon the 15 and pressed between the die 15 andthe con-V -icall bottom 18of the intermediate plate12. The depth of the shoulder 17 atthe 'edge' of the recess 16 the die 15 is substantially equal to the thickness of the metal band so thatwhen theparts of the die are brought.

together the band is forced down against the conical bottom of therecess 16 as shown in Fig.5. The' band is thus bent slightly past the flat position but, upon release of the -dies, the inherent resiliency of the metal wi'll'cause it to springback to flat shape, the

1 :angle \of sthe conical faces 16and 18 being just suflicient to take care of the spring of the metal.

7 The press is designed to act simultaneously upon blanks A and B and after each operation thereof a finished ring is taken fromjthe die 15, a partially formed blan k B istransferred from the upper die 14 to. the lower die 15 and new blank A i serted u en the die 14. I

It wil be obvious that it is possible to at bottom of i rotate the flange which issubstantially parallel to {the axis of the cylinder'more or less than as desired. Also the faces 16 and 18 of the dies may be ofsuch angle as to cause the band when it is removed from the dies to have the desired "shape. In working with resilient metal, suchas steel, it is usually "necessary to have the faceslG and 18 of the die at an angle which will cause the metal to beturned further than that desired for the l'inished ring so that allowance is made for itto spring backito the desired shape. 7

It. will be seen, however, as the flange '7 is rotated from a position longitudinal with respect to the axis of the annular band to a position transverse with respect to said. 7

of the metal of the flange'which is, rotated remains at substantially aconstant distance:

away from the axis Thatis, the outei'igpor tion of the flange that is being rotated with axis the annular center ofthe cross section,

respectto the axis is actually expanded or enlarged, while the inner portion ot the flange is compressed and made smaller in diameter. This does not mean, however,

that the thickness oft-he flange is changed as th-is can be controlled by the shape of the dies and the pressure used, so that when the flangels turned transversely with respect 'to thickness it was originally.

the axis it can beof substantially the same- It is to -be. understood, however, that my invention may be used connection with 'cylindrical; bands of various. shapes in when desired 'to turn or rotate a part orj all 1 of the band at an angleto the axis. 7'

it is In'case itis desired torotate arel'a'tively thick or wide flange ofthe band, this may-be done "in more thanthe two operations neces sary togive the'band the desired final shape.

I Furthermore, it is to be understood that the particular forms of apparatus shownand 7 described, and the particular procedure set forth, are presented for purposes of explanation andillustration and that various modifications of said apparatus and procedure" can'be made without departing from my invention as defined in theappended claims.

What I claim is:

1. The method of changing the plane of an annularbody disposedlongitudinally with respect to the axis'the'r'eof to a substantially transverse position' with res ect to said axis,

which comprisesipressing t e annular body between oneor more sets of cooperative dies.

and rotating the flange while keeping the.

median line of the body as it isbeingirotateth at substantially the same radial distance" 2; The method of forming a-substa ntiallyc from said axis. i.

fiat ,metal ring from a substantially'cylindrical band, which comprises forcing a tapering die" into the band to expand the same to conical form, flattening the *conical' ring so formed, and holding the median line of the ring to a given diameter during the flattening operation. V

3. The method of forming a substantially fiat metal ring from a substantially cylindrical band, which comprises pressing the band to conical form and subsequently pressing the band between dies while keepingthe median line of the band at substantially the same radial distance'from the axis of drical band, which comprises expanding the band to conical form by the action of a;

tapered plunger die, subsequently subjecting the same to pressure between flattening dies engaging opposite edges of the band, and restraining the outward movement of the outer edge thereof to hold the median line of the ring to a given diameter.

6. The method of changing the plane of an annular body disposed longitudinally with respect to the axis thereof to a substan tially transverse position with respect to .said axis, which comprises pressing the annular body between one or more sets of cooperative conical dies until the fiange has been rotated toward said axis more than the desired final position of the body, and allowing the body to spring back to final position.

"7. The" method of forming an aperturedv disc that consists in forming an annular cylindrical band,npressing the band to coni- 1 cal form,- flattening the conical 'form to apertured disc' form while confining the outer edge portion thereof during a portion of the process in order toprovide an apertured disc ofsubstantially, the same mean diameter as the mean diameter of the annular cylindrical band.

8. The method of forming an annular apertured disc that consists in forming an endless annular band of cylindrical form, pressing the band toconical form, partially flattening the conicalform axially, confining the outer edge portion of the partially flattened conical body to prevent further increase in peripheral diameteig andreversing 'the concavity of the disc to impose reversed strains in the metal, and releasing said disc. 7 L

In testimony whereof, I hereunto aflixmy signature. I

FRED R. KLAU S.

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