US1609785A - Method and die for producing forged circular disks - Google Patents

Description

Dec. 7 1926.

C. J. STEEN ET AL METHOD AND DIES FOR PRODUCING FORGED CIRCULAR DISKS Filed Jan. 12v 1924 2 Sheets-Sheet 1 v [dward Vfi'izzeraq the: nu;

Dec. 7 1926. 1,609,785

C. J. STEEN ET AL METHOD AND DIES FOR PRODUCING FORGED CIRCULAR msxs 2 Sheets-Sheet 2 Filed Jan. 12. 1924 6T dSteen Edward I/Tii'neran Patented Dec. 7, 1926;

OFFICE CHRISTIAN J. surnnn, OFrPH ILADELBHI-A, PENngsYLvAmA, AND. EDWARD v. FINERAN, or SEASIDE HEIGHTS,1 NEW-JERSEY.

en eet e file J n en .2 3 S i lJf 68 1 Our invention relate toa thod of p 1f0- du cing disk forgings such as blanks for r k Wheels f eam t b nes e ldbl 'l ke, and the dies used in connection therewith.

Ordinarily the blanks for the bucket Wheels are obtained by pressing the billets into the desired shape between dies that have the contour of the wheels. Experience has shown, however, that no satisfactory results are obtained inv this manner" because I the surfaces of the wheel blank becorne wavy or crinkled, T e p e e n e t n Q a ms. he a i this disadvantage and to produce a a Wheel and even surface'when it leaves the forging Pre -e The special dies forming thesub teet matter of the present invention are eonsequently arranged tangentially aboveand' below the n'g i h less. s th e lyr sm 7 rectangular area is treated for each stroke I of the press plunger.

In the accompanying draw ng, one embodiment of the invention is illustrated,

and v "F r i e pla w e lh tt mc dies n turntable as arranged 'ona forging press of the dies andturntable in position onthe P e Figure 3 is a side elevationot thedi es;

Figure 4 is a transverse section along line represents a falsebbttqln siippbijtedibnthef base 11 of a forging pressfand-nunieral 12 represents 7 a false top' bolted: 0r secui a unde h p ess, tee h any suitable manner 13.

r l y e. iel e'bet em. Q is-r ie- L vided a lifting cylinder 1&1 in is vmounted torecipigocate axially a'pijston l5 A i i i i .breeer isli u ed w ning eu ep terminating at its uppe1; en d, with 'a crown ing 17"such as a ball or rollerbearing. ,The I y suit bl manner s; fer n eneeby e pawl 20rcarried on the under side of the turntable l6, and engagingratchet teeth 21,, e eiwhe' l. en g a 2 whi s: fi d y j m unted u n t fa s bott 1 around the p ston 15. It evident that the revolv- .o c v c in e i ie u fe le may,' aecemplish d y b e k' he s h mo en o an h s e Ple e fie 1 for whiclrpurpose an inlet pipe 24. leads into the bpttoinof the lifting cylinder 14.

Eeeh ef h b tem' d esas. sf p a 26 provided with apertures for securing bel s 2? wh ch in. the sual a n r engag with; theirheads in T"-slo ts running transversely in the false bottom 10. From the e P at 2 se e. t a g r g 28 a ing downwardly sloping parallel sides 29 and a lfl at narrow t p face 30. The length of the (die is slightlygreater than halfthe length g re 2 s e ev t part y n se t f' f.8l$ bisem.

At. s ce ra ly Pesi ea d n h r g 12,8,1hes ill s'.e ly p oje ti g. he 81 the 159R ie "3 2 efw ii hi lope w nt y fromtlie top surface 30of the ridge 28.

lk rm '83. pr iee s il le tud e d from the. ridge 2 8 and terminates with j a e eeril lleib ly of h ridge-28 is furnishe d an aperture-36. Brace rods connect the Ltwq bottomdies 25, each of the .r-eds ee e en eerl n die n a aperture .36 oi the other-die. The bars are v4 i. e ar ged' parallel with and equidistant elidiem t t l P an run n s is ilieier teble en u fi ie i1y. rampar felea a al m n e h fllslfiQf i umteble u also sheets? .e'fi thebueke W e 9 ter it been formed. T heb ace rods also serve .i. .ns the dietsl eebs we n h e eeje e, ef var ensdiemete e h i l-e in. l sp ts. ke th l th ese l'iti lt l Only, e

es, AZLPIQfi Qd the. hee s .4 This I "-11; een'seq eefilyrbe tua n firiie l, s ert i alp ne the e be mg no obstructions in the way. No arms need therefore be provided on the upper dies.

These dies are secured to the false'top 12 in the same manner as the lower ones to the false bottom, namely by bolts 44:, the heads of which engage in corresponding T-slots in the false top. The latter is in the usual manner bolted to the head 13 of the forging press, while the false, bottom 10 is secured to the base 11.

i In Fig. 7 is represented the result of the ordinary manner of producing a forged disk. The surface T6 of the blank is crinkled or wavy.

The following are the steps in producing a disk or wheel blank or finished forging. in accordance with the present invention:

First, from an ingot is cut a. billet of the proper weight for the finished forging and shaped under a forging-press or hammer into a round flat disk which in the following will be called the cheese and constitutes the preliminary forging. The disk should be of approximately the same thickness as that of the wheel hub of the finished forging.

Second, with top and bottom dies secured to the top plate 12 and the bottom plate 10 as indicated in the drawings, and adjusted with the heels 31 diametrically opposite each other to the exact diameter of the hub of the finished forging; the cheese is now inserted between the stationary bottom dies and the raised top dies and permitted to rest upon the fingers 18. The hydraulic pressure in the lifting cylinder has been previously applied so that the turntable 16 carries the cheese with its bottom face slightly above the top faces 30 of the die ridges 28 permitting the turntable to turn the cheese freely when the press head with the top dies is raised.

Third, the press head 'ith the top dies 40 is now lowered against the cheese, when the latter descends together with the lifting cylinder piston until meeting with theridges and heels of the bottom dies 25. A narrow groove or channel is thus produced by each of the ridges on both sides of the cheese terminating at the inner end with an inclined surface running inwardly from said groove orchannel in radial direction of the cheese, this inclined surface 5Qbe ing produced by the sloping heel of each die. The squeezing of the metal thus takes place tangentially of the wheel, by the die ridges while the heels compress the metal inwardly in radial direction around the hub 37 instead of outwardly. The metal is thus pressed into greater compactness.

Fourth, the press head is raised sufficiently to permit the top dies to leave the cheese and the latter will be slightly lifted from the bottom dies by the pressure exerted in the lifting cylinder against the piston 15. The pawl 20 shifts position from one tooth to another depending upon the set'ting of the adjuster screw against the bottom of the turntable 16. As the distance is increased between the crown 23 and the latch et wheel 22, and the cheese is free from both top and bottom dies, the pawl 20 will take a nearly vertical position and thus the ratchet gear causes the revolving of the turntable with the cheese through a small angle due to the pawl on the downward stroke engaging another tooth 21 on the stationary wheel 22. tions of the top and bottom surfaces of the cheese are exposed to the ridges and heels of the dies.

For each stroke of the press head a new channel or groove is thus produced by each die in the top and bottom surfaces of-the cheese until after a complete revolution of the latter its surfaces will have the appearance indicated in Fig. 5 of the drawings.

The longer the process is continued and the more turns the cheese is permitted to make, the less pronounced will the channels or grooves be until finally a smooth surface is produced entirely devoid of a Wavy or crinkled edge.

Another advantage in forging a wheel blank in this manner is the packing or building up of the metal around the hub, thus insuring a full forging, this being caused by the heel or hub-forming projection on the die.

As will now be understood the method simulates very closely hand forging of a wheel.

Having thus described the invention, what is claimed as new is:

1. A die for circular forgings, comprising a foot portion adapted to be secured in a forging apparatus and a two armed bodyportion of uniform height and substantially L-shaped configuration forming a. ridge rising from the foot portion and having upwardly converging side and end surfaces, one of said arms being arranged radially and the other arm arranged tangentially with regard to the forging. whereby the radial arm is adapted to form the hub and the tangential arm the remainder otthe forging, substantially as described.

A die for circular fol'gings, eou'iprising a foot portion adapted to he adjust-ably secured in a forging apparatus and a ridge portion of substantially uniform height rising from the foot portion and consisting of a short arm arranged radially and a long arm arranged tangentially with regardv to the circular forging, and the top surface of the short arm sloping downwardly from the top surface of the long arm in order to form a hub portion on the circular forging,subi stantially as described.

In this manner other sec- 3. The combination with a forging press having a stationary member and a reciprocating member; of dies adapted to be adjustably secured to said members respectively, each of said dies comprising a foot, a ridge rising from said foot and having a substantially rectangular top surface and downwardly diverging side faces, and a side projection extending substantially at right angles from said ridge having a top surface sloping away downwardly from the top surface of said ridge; said dies being arranged in pairs on each of said members with their side projections placed diametrically opposite each other pointing centerwards and the ridges running substantially in tangential direction.

4. The combination with a forging press having a stationary member and a reciprocating member; of dies adapted to be adjustably secured to said members respectively, each of said dies comprising a foot, a ridge rising from said foot and having a substantially rectangular top surface and downwardly diverging side faces, and a side projection extending substantially at right angles from said ridge having a top surface sloping away downwardly from the top surface of said ridge; said dies being arranged in pairs on each of said members with their side projections placed diametrically opposite each other pointing centerwards and the ridges running substantially in tangential direction, a turntable mounted in said stationary member, means for lifting said turntable, and other means for intermittently turning said turntable a small angle between each stroke of said reciprocating member.

5. The combination with a forging press having a stationary member and a reciproeating member; of dies adapted to be adjustably secured to said members respectively, each of said dies comprising a foot, a ridge rising from said foot and having a substantially rectangular top surface and downwardly diverging side faces, and a side projection extending substantially at right angles from said ridge having a top surface sloping away downwardly from the top surface of said ridge; said dies being arranged in pairs on each of said members with their side projections placed diametrically opposite each other pointing centerwards and the ridges running substantially in tangential direction, a turntable including a source of fluid pressure and conduits therefor mounted in said stationary member, means for lifting said turntable, and other means for interinittently turning said turntable a small angle between each stroke of said reciprocating member and comprising a pawl and ratchet device inserted between the turntable and the stationary member.

6. A method of producing a blank of the class described, consisting in first providing a cylindrical cheese of correct weight and thickness; second, forming by compression tangentially running narrow channels on opposite faces of the cheese terminating with a sloping surface at one end of each channel running in radial direction toward the cen ter of the cheese, each of said channels with its corresponding sloping surface forming substantially an L-shaped contour.

7. A method of producing a blank of the class described consisting in first providing a cylindrical cheese of correct weight and thickness; second, forming by compression tangentially running narrow channels on opposite faces of the cheese terminating with asloping surface at one end of each channel running in radial direction toward the center of the cheese, third, turning the cheese a small angle; fourth, forming other channels by compression in the same manner and repeating the turning and compression alternately until the entire top and bottom surfaces have been so treated, each of said channels with its corresponding sloping surface forming substantially an L shaped contour.

S. A die for circular forgings, comprising a foot portion adapted to be secured in a forging apparatus and a two armed body portion of substantially L-shaped configuration forming a ridge rising from the foot portion and having upwardly converging side and end surfaces, one of said arms being arranged radially and the other arm tangentially with regard to the forging, substantially as described.

9. A die for circular forgings, comprising a foot portion adapted to be adjustably secured in a forging apparatus and a ridge.

portion ri ing from the foot portion and consisting of a short arm arranged radially and a long arm tangentially with regard to the forging, and the top surface of the short arm sloping downwardly from that of the long arm in order to form a hub portion on the forging, substantially as described.

In testimony whereof we afiix our signatures.

CHRISTIAN J. STEEN. [1,. s.] EDWARD V. F INERAN. [L. s.]

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