US1464094A - Forging mechanism - Google Patents

Description

Aug. 7, 1923.

F. A. HALLECK FORGING MECHANISM Original Filed March 6, 1917 Patented Aug. i", 1923.

FRANK HALLECK, OF OAK PARK, ILLINOIS, fLSSIGNOl-t T0 SULLIVAN MACHINERY COMPANY, A CORPORATION 013 MASSACHUSETTS.

FOBGING MECHANISM.

Divided and this application filed an object ofiny invention is to provide an improved forging mechanism. Another object oi? .my invention is to provide an improved forging mechanism particularly adapted for use in drill sharpeners. A further object of my invention is to provide an improved forging die mechanism adapted for use in drill harpeners and especially adapted for the reforming of drill steels or for the straig itening of bent steels. Other objects and advantages of my invention will be hereinafter more fully apparent.

In the accompanying drawings 1 have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings;-

Fig. 1 is a perspective view of a pair of die blocks constitut ng the illustrative embodiment of my improved forging mechanism.

Fig. 2 is a front view of said die bloc is.

In making drill steels, it is customory to form lugs spaced a shortdistance from the rear end of the steel in cases where lugged steels are to be produced, these lugs cooperating with retaining means of various forms to maintain the drill steel within certain maximum distances of the drill steel striking means and alsoserving to permit the ready extraction of the drill steel from a hole. In one well known process of forming these lugs, a steel is clamped adjacent its rear end in a pair of clamping dies, which dies are formed with a socket or enlarged opening into which material may be upset and then a suitable dolly impartsa series of blows to the rear end of the steel in such a manner as to upset material into the recess mentioned to form alug. During this upsetting process there is if course a possibility of bending the end of the steel to the rear of the portion which is clamped between Patent No. 1,416,635, dated May 16, 1922. April 11, 192.. Serial No. 551,440.

the clamping dies and, in view of the Itl Cl; that the chuck in which the rear end of the steel 15 received during drilling op eration is made of such size as to be a fairly snug fit for a perfectly true steel. it will be evident that any slight deformation might result in. its being impossible to insert the rear end of the steel into the chuck for the necessary distance to permit it to be reached by the hammering means. it will also be evident that in case a steel is somewhat bent it is desirable to be able to straighten the same and my improved means when suitably mounted can also he used for that purpose. In the illustrative form of my invention 1. provide a pair of die blocks 1 and 2 of which the die block 1 is adapted to be supported in a stationary anvil block or other stationary frame member (not shown) in a well known manner. The die block 2 may be carried by a reciprocating hammer memher and caused to move toward and from the die block 1 during hammering operation. or in another well know construction may be forced into juxtaposition with the die block 1 and .then struck through the intermediation of its carrying member a rapid series of blows to produce the necessary straightening o1 the steel between the die blocks. The die block 1 is provided with a groove 3, herein shown semi-hexagonal in cross section, and of a size to accurately receive one lateral half of the rear end of a drill steel. It will of course be understood that if an octagonal or other shaped steel were to be employed, the recess 3 would be made of a corresponding outline.

The cooperating die 2 is provided with a recess a which has a fiat bottom 5 and which is made materially wider than one of the sides of the regular polygon which corresponds to the cross section of the steel. The

depth of the groove i is preferably exactly equal. to the apothegm of this polygon.

The mode of operation of this device will be readily apparent. A steel to be straight ened will be rested in the groove 3, and as the steel is somewhat crooked it will be evident that it will not lie perfectly flat in the groove. The die member 2 will then be caused to forcibly engage the projecting portion of the steel and will flatten it down into the groove, the surface 5 engaging one of the sides of the polygonal prism of the steel. By reason of the width of the groove 4, there will be no tendency to mutilate the steel as would be the case were a groove the reverse of the groove 3 employed and the dies not absolutely perfectly opposite each other, and as would be likely to occur, in fact, even were the grooves absolutely opposite each other, since there would be a tendency for the slightly deformed steel not to absolutely conform to the groove in a single operation, but rather to be partially distorted and pinched between the surfaces of the dies 1 and 2. In the process of straightening the steel, it is turned so that several different faces of the polygon will be engaged. by the face 5 and accordingly without and distortion or other disadvantageous effects, the end of the steel will assume a perfectly true polygonal prism shape.

This case is a division of my copending application filed March 6, 1917, Serial No. 152,871, Patent No. 1,416,635, granted May 16, 1922, for forging machines.

Vhile I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. Swaging dies for drill steels comprising stationary and movable die blocks, one of said blocks having a steel truing channel extending longitudinally thereof to one end of the block and the other having a cooperating widened flat bottomed channel engageable with the upper surface of a steel in said first mentioned channel.

2. Swaging dies for drill steels comprising stationary and movable die blocks, one of said blocks having a steel truing channel extending longitudinally thereof and of a cross section equal to one-half the cross section of the steel to be treated therein and the other having a cooperating widened fiat bottomed channel having a surface adapted to engage the upper surface of a steel disposed in the first mentioned channel, the depth of the second mentioned channel being substantially equal to the depth of the first mentioned channel.

3. Swaging dies for drill steels comprisingstationary and movable die blocks, one of said blocks having a. steel truing channel extending longitudinally thereof and of a cross section equal to one half the cross section of the steel to be treated therein and the other having a cooperating widened flat bottomed channel having a surface adapted to engage an upper surface of the steel in said first mentioned channel, the depth of the second mentioned channel being sub stantially equal to the apothegm of the polygon formed by a cross section of the steel.

at. Swaging dies for drill steels comprising stationary and movable die blocks, one of said blocks having a steel truing channel formed therein whose cross section is similar to the cross section of one lateral half of a drill steel to be treated therein and tl e other of said blocks having a groove formed therein of a depth equal to the apothegm of the polygon corresponding to a cross section through the steel and of a width greater than one of the sides of the polygon.

5. Straightening dies for drill steels con;- prising a stationary and a movable die block, one of said blocks having a steel ceiving groove formed therein so shaped as to accurately fit a portion of the periphcry of a straight steel of the kind to be straightened therein and the other of said die blocks having a flat bottomed groove therein of substantially greater width than the width of the first mentioned groove and adapted to engage a steel disposed in the latter, the combined depths of the grooves being such as to receive a true steel when the dies are in closed position.

6. Straightening dies for drill steels com prising a stationary and a movable die block, one of said blocks having a steel receiving groove formed therein so shaped as to accurately fitcertain sides of a perfect polygonal prism corresponding to a straight steel of the kind to be straightened therein, and the other of said die blocks having a groove therein wider than a side of such polygonal prism and adapted to engage one of the surfaces of a steel, the combined depths of said grooves being such as to re ceive a true steel whe said dies are in closed position.

In testimony whereof I affix my signature.

FRANK A I-IALLECK.

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