US1416635A - Forging machine - Google Patents

Description

F. A. HALLECK.-

FORGING MACHINE. APPLICATION FILED MAR- 6, I917.

41 35 Patented May 16, 1922.

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FRANK A. HALLEGK, or OAK rams, rrnruois, ASSIGNOR TO SULLIVAN maenrnnnr COMPANY, A CQBPOEATIQN OF MASSACHUSETTS;

IEORGING. MACHINE.

Specification of Letters Patent.

Patented May 16, 31922.

Application filed March 6, 1917. Serial No. 152,871.

To aZZ whom it may concern:

Be itknown that I, FRANK A. HALL'EOK, a citizen of the United States, residing at Oak Park, in the county of @001; and State of Illinois, have invented certain new and useful Improvements in Forging Machines, of which the following 1s a full, clear, and

exact specification.

My invention relates toforging machines. It has for its object-to provide improved means for forming drill steel shanks especially adapted to use in connection with collared drill steel. A more specific object of my invention is to. provide improved dies. and cooperating mechanlsm whereby a collar.

may be formed on a drill steel with increased accuracy and facility andln an appreciably less time. i

In the accompanying drawings, I have for purposes of illustration shown one embodiment which my invention may assume in practice In these drawings,

Fig. 1 is a partial vertical sectional view ofthe mechanism embodying my improvement.

Fig. 2 is; a detail. partial. vertical sectional dolly.

Fig. 3 is an end elevation of the swaging dies in closed position, a steel-being shown.

therein.

Fig. 4 is a perspective view of one of the upsetting dollies.

Fig. 5 is a, perspective view of one of the clamping dies.

Fig. 6 is a perspective view of the swaging dies, the upper die being shown 1n a plurality of positions, and a steel being shown in position between the dies.

This. invention is an improvement upon the invention of one \Yade H. lVineman, and. in. it'thev same machine may be used and the same steps in treating the steel prior to the upsetting of the same are followed, the steel being first heated at a: point intermediate-its ends and having its end then quenched in order to prevent the upsetting of. the. end when the said end is dollied.

In, my improvement, the steel 1, after this preliminary treatment, is clamped between a pair of clamping dies 2 and 3, of which the. die 3 may be fiXQdgt-Q a suitable support view showing the clamping dies and the- 4, as for instance a machine frame, while the die 2 may be carried by a suitable vertically recipr cable power operated clamp- 111g member 5 of well known construction. As shown, the dies 2 and 3 are of the same form, each; of the same being provided with alongitudinally extending steel receiving channel 6 preferably of the same conformation as the steel, herein for example shown as of hexagonal cross section. As illustrated, each of these channels 6 terminates in a. grooved out portion 7 of greater diameter-having sloping collar forming walls 8 leading thereto. This portion 7, as shown, also terminates in at right angles tothe axis of thechannel 6 and in turn forms the inner end of a larger recess 10 havingthe form of a truncated cone and located at the dolly end of the dies. In these dies, the steel is clamped preparatory to the upsetting" process, with its heated portion lying within the opening formed by the recesses 10 and 7 and its quenched end extending beyond the recesses 10 and the limits of the dies 2 and 3, all as shown in Fig. 1.

Cooperating with the dies 2 and 3 above f larger, which bore is adapted to receive the quenched end of the steel. As shown, the dolly is also provided with a tapered front portion 14, adapted to move into the recess formed by the cooperating recesses 10 of the dies and 3,'and a flat frontend 15 adapted; to cooperate with the end wall 9 of those recesses in forming: the collar on the steel. Thus, it will be noted that as the dolly 11 is reciprocated, the yn'otrudinp; end of the steel 1 is hammered so that the heated poition of the steel lying within the recesses 7 is upset laterally in such a manner as to fill the grooves 7. Obviously, as this upsetting process continues, the front end 15 of the dolly 11 will also be brought into engagement with; the opposite side of the lata wall 9 which extends Cir ' erally protruded metal so that as the reciprocation of the dolly 11 is continued the metal will be shaped between the surfaces 15, 8 and 7, until it assumes substantially the shape shown in Fig. 2.

After the collar has been so shaped and usually without further heating, the portion of the shank entering the drill chuck may, if necessary, be sized and straightened by working the same between cooperating swaging dies 16 and 17. Of these dies, the die 17 may be a stationary die while the die 16 may be a vertically reciprocating die. In this instance, it will be noted that the die 17 is provided with a' steel receiving channel 18 of substantially the same cross section as the steel, while the upper die 16 is provided with an elongated and preferably slightly wider flat bottomed channel 19 disposed over the channel 18 in such a manner that, when the steel is laid in the channel 18 with its collar abutting against the front wall of the die block 17 (Fig. 6) and the die 16 is reciprocated, the portion of the same received in the drill chuck may be sized and straightened into the desired form. Obviously, the steel may be further finished off, if desired, by alternating the same between the clamping dies and the swaging dies. When necessary,

the same is also brought down to size under these dies before it is upset, thus avoidmg stlckmg 1n the upsettmg dles and dolly. The divisional subject matter relating to the dies 16 and 17 is being covered in my copending application, Serial No. 551,440, filed Apr. 11, 1922.

In the use of my improvement, it will be noted that after the steel has been suitably heated and quenched, the formation of the collar is completed in one operation, the dolly cooperating with the die in forming the collar and thereby insuring the formation of a collar of the correct dimensions. Through the cooperation of the cooperating die and dolly above described, it will also be noted that the metal is thoroughly worked at the same time that freedom is given for the metal to expand laterally in the desired form. It will also be noted that if any scale is formed in the upsetting process, the same may escape from. the dies through a sloping passage 20 in the bottom of the recess 10. In the shaping of the collar the dolly moves into one of the recesses, i. e., 10, in the clamping members 2 and 3 and cooperates with the latter to define the limits of the recess 7 into which the collar is upset and wherein it is actually shaped. Attention is also directed to the fact that due to the telescoping of the steel within the dolly, the end of the shank is maintained substantially straight at the same time that a very rugged die and dolly construction is produced. In connection with 1 the swaging dies, it will also be noted that due to the widening of the surface 19, all

necessity for great accuracy in aligning these dies is eliminated. These and other advan tages of my improvement will, however, be apparent to those skilled in the art.

While I have in this application specifi cally described, one embodiment which my improved mechanism may assume in practice, it will be understood that various modifications may be made in the same without departing from the spirit of the invention and that it is my intention to include all such modifications within the scope of the appended claims.

l V hat I claim as new and desire to secure by Letters Patent is: I

1. In a forging machine for drill steels, relatively movable clamping members provided with a plurality of recesses, and a dolly movable into one of said recesses to define with said clamping members the limits of another of said recesses into which material to be forged may be upset.

2. In a forging machine for drill steels, relatively movable clamping members provided with a plurality of recesses, and a re cessed dolly movable into one of said recesses to define with said clamping members the limits of another of said recesses into which material to be forged may be upset.

3. In a forging machine for drill steels, relatively movable clamping members provided with a plurality of recesses, and a recessed dolly movable into one of said recesses to define with said clamping members the limits of another of said recesses into which material to be forged may be upset, said dolly having a material working surface surrounding the recess therein.

4. In combination, clamping dies formed with recesses constituting a clamping channel, a dolly receiving recess, and an intermediate shaping recess connecting said channel and dolly receiving recess, and a dolly movable into its recess and having an axially disposed recess in alinement with said clamping channel. and of a greater cross sectional. area than the latter, said dolly having a transversely extending working surface surrounding said axially disposed recess and adapted to cooperate with the shaping recessin said clamping dies.

5. Forging dies for drill steels comprising cooperating die blocks each having a steel carrying channel formed adjacent one end of the block, recesses of materially greater diameter disposed at the other end of the block, and an intermediate material shaping recess connecting said channel and said first mentioned recess and of a diameter intermediate their diameters.

.6. Forgingdies for drill steels comprising cooperating die blocks each having a steel carrying channel. provided with a transverse groove and a communicating tapered recess of greater diameter disposed at one end of the 130 groove and having an inner end Wall disposed transversely of the channel and surrounding the groove.

7. Forging dies for drill steels comprising cooperating die blocks each having a steel receiving channel and a communicating laterally disposed recess having sloping Walls, said recess in turn terminating in a rear transversely disposed Wall of a larger recess opening out of one end of said die block.

8. Forging dies for drill steels comprising cooperating die blocks each having a steel receiving channel and a communicating laterally disposed recess having sloping walls,

said recess in turn terminating in a rear transversely disposed Wall of a larger recess of circular cross section tapered throughout its length and opening out of one end of said die block.

9. In combination, steel clamping dies having a recess provided with a collar forming surface at its inner end and a scale discharging passage extending from its inner to its outer end, and a cooperating dolly movable into said recess and having a surface cooperating with said collar forming surface.

In testimony whereof I affix my signature.

FRANK A. HALLEOK.

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