US1839531A - Apparatus for rough forcing rings - Google Patents

Description

Jan. S 1932. v F BRAUN 1,839,531

APPARATUS FOR ROUGH FORGING RINGS Filed May 11, 1929 2 Sheets-Sheet 1 glwuawtoz M WM rz/M Jan. 5 1932. V, BRAUN 1,839,531

APPARATUS FOR ROUGH FORGING RINGS Filed May 11, 1929 2 Sheets-Sheet 2 and its dies, on a reduced scale,

Patented Jan; 5, 1932 VICTOR F. BEAUN, F ll-IILVIAUKEE, VJISCfiNSEN APPARATUS FOEROUGH. FQELGING RINGS Application filed 7 May My invention relates to improvements in apparatus for forming rings from ingots.

The object of this invention is to provide simple and expeditious means for breaking or tearing apart the central-web between the depressions in the ingot, stretching the sides until the blank assumes an annular form, and then forcing the blank into a die and hammering it true to size in acircular form, thereby completing the ring.

In the drawings:

Figure 1 is a view of a forge equipped with stretching tools, the blank being shownin position for a stretching operation.

Figure 2 is a view of pletion of the stretching operation.

Figure 3 is a fragmentary view, right angles to Figure 2.

Figure 4: is an elevation showing the forge as it is used during the final operation of hammering the blank into ring form, portions of the dies being illustrated in vertical section.

Figure 5 is a view similar showing modified shearing and stretching tools adapted for light work.

Like parts are identified by the same reference characters throughout the several views.

' The work will first be prepared by any suitable means in the form of a blank B having channels in opposite faces, partially severing it longitudinally intermediateof its ends, the channels being substantially in the same plane.

This blank B will be placed upon a stretching or shaping block 25 having a notched upper end, the base of the notch forming a taken at rounded saddle 26 which is inclined from the transfer to the saddle 26.

shearing face 27 inwardly toward the side wall 28 of the notch. The shaping block 25 is securely bolted to a suitable bed 15, this bed being also preferably equipped with a die 16 cooperative with a plunger die 21 carried by the plunger as shown in Figure 5, whereby an ingot may be pressed or hammered to the desired shape, i. e., into the form of the blank B as shown in Figure 1, preparatory to its I The saddle 26 is of a width to receive one side portion of the the same at the comto Figure 1,

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blank B when the latter is placed thereon as illustrated in Figure 1, the same being held by suitable tongs illustrated in dotted lines,

pending the tearing and stretching operation now to be described.

The plunger 20 isprovided with a tongue shaped stretcher plate 30 with one side margin 31 in a position to move downwardly along the face 27 of the supportin block substantially'as in a shearing operation. The lower margin 32 of the plate is .rounded in substantial conformity to the curvature of the ring to be formed, as clearly shown in Figure 3, whereby pressure will first be applied to the worlrsubstantially at its center, and the lower side of the blank forced into conformity with the contour of the end of the plate as the movement proceeds. The width of thestretching plate is somewhat less than the length of blank, but the web tears to the ends of the recesses and the ends of the blank are drawn inwardly.

When the stretching plate initially contacts with the work, the latter will, of course, tend. to tip downwardly on the overhanging side, but in the meantime the plate will reach a position to prevent the work from leaving the saddle 26. Continued downward movement of the plate 30 will then sever or tear apart the web I; and press the side portion B of the work downwardly, the ends being drawn inwardly toward the circle to which the work is to be conformed. There will be some distortion and a sligit twisting tendency atthe ends, but the blank will assume the general form in which it is shown in Figures 2 and 3.-

Afterthe blank has been torn open by the the recesses in the operation of the stretcher plate 30, and the latter has been retracted, the blank may be removed from the block 25 and placed on the die block 35, over the annular recess 86 therein. Ahammer die 37, having a similar annular recess 38, is then employed to drive the work into conformity with the dies. Both dies have theirsurfaces cut away along the margins of their annular recesses to form a gutter for the escape of surplus metal to be out or trimmed away after the operation has been completed.

While all of the operations herein described might be performed in a single forge by shifting the work from one set of tools to another, it will ordinarily be found desirable to employ separate forges, in any case where the operation of one tool would interfere with the operation of another. The work may be very rapidly done for the reason that the nlethod employed and the tools used, avoid adhesions such as have heretofore delayed the progress of such work, and which have endangered the workmen who were required to break away the work from the tools. By the method herein described, the pressing, tearing and spreading operations may proceed with such rapidity as to keep more than one hammer forge supplied with work in the final stages of hammering the blanks into ring form in the dies.

It is not essential that the work should be partially severed, before separating and spreading the sides. Particularly, in cases where light materials or thin ingots are being worked, it is possible to place the ingot directly upon the saddle 26 and employ the plate 30 tion and bend one side downwardly interme diate of its ends to form a rough ring in a single operation illustrated in Figure 5. T his rough ring can then be transferred to the finishing die to be hammered into shape.

It will also be obvious that in the finishing operation, the hammer will in each instance have its lower surface contoured in accordance with the required contour of the upper urface of the completed ring, and for thin work only the lower member may be recessed if the upper surface of the rin is to be flat.

I claim: H

1. In apparatus for rough forging rings, the combination of a supporting block having a shearing face and a depressed rounded saddle along the upper margin of the shearing face for supporting the work, an overhead plunger provided with a stretching plate adapted to move downwardly along said shearing face to engage portions of the work projecting laterally from said saddle. r 2. ln apparatus for rough forging rings, the combination of a supporting block having a shearing face and a depressed rounded saddle along the upper margin of the shearing face for supporting the work,-an overhead plunger provided with a stretching plate adapted tov move downwardly along said shearing face to engage portions of the work projecting laterally from said saddle, said plate having a rounded lower end adapted to engage and stretch the work into rough ring form over said saddle.

3. In apparatus for rough forging rings, the combination with the bed and hammer slide of a forge, of a set of shearing spreadas a shear to sever its central por their ends,

ers each adapted to engage a portion of the work on opposite sides of its longitudinal center line, and means for effecting relative movement of said spreaders in parallel planes to separate the engaged portions of the work, the work engaging surfaces being rounded in general conformity to the curvature of the ring to be formed.

4. In apparatus for rough forging rings, the combination with means for supporting partially severed ingots in an oblique plane extending through said portions and their partiall severed connections and means for tearing the partially severed portions apart by relative pressures applied to them in adjacent parallel planes intersecting said oblique plane.

5. In apparatus for rough forging rings the combination with means for supporting ingots which have been partially severed intermediate of their ends, said supporting means being adapted to hold the ingot in an oblique plane which includes the line of partial severance and means for applying relative pressure in opposite directions to the side portions in adjacent parallel planes ntersecting said oblique plane and at opposite ides of said line of partial severance to tear said portions apart, intermediate of and separate them, said pressure applying means having arcuate surfaces over which said side portions are stretched in the tearing and separating operation.

VICTOR F. BRAUN.

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