US1302274A - Composite die for drop-hammers and the like. - Google Patents

Description

A. F. ARTHUR.

COMPOSITE DIE FOR DROP HAMMERS AND THE LIKE. 7

APPLICATION FILED APR. 2!, I916- 1,302,274, Patented Apr. 29, 1919.

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I ALBERT F. ARTHUR, OF CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND HARDWARE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

COMPOSITE DIE FOR DROP-HAMMER?) AND THE LIKE.

Application filed April 27, 1916. Serial No. 93,834.

To all whom it may concern:

Be it known that I, ALBERT F. ARTHUR,

State of Ohio, have invented a certain new and useful Improvement in Composite Dies for Drop-Hammers and the like, of which the following is a full, clear, and exact description.

This invention relates to dies for drop hammers and presses, and has for its chief object to provide a composite die including a finishing and one or more break-down or roughing-out dies,-which has high efiiciency for the production of commercial forgings in drop hammers and presses, and has long life and durability. I

In accordance with the present invention I form, preferably by cutting, merely the roughing-out or break-down dies in a shoe or holder, and produce the finishing die in a separate piece preferably by a forging process constituting the subject-matter of companion applications filed by me, and attach this finishing die to the shoe or holder in which one or more of the roughing-out dies have been cut in such a way that it is held rigidly and when attached to the shoe is just as efiective as if the three dies were all cut in one integral piece. In consequence, if the finishing die becomes worn or is broken it can be removed from the shoe and another finishing die inserted instead, so that the shoe with the break-down or roughing-out dies can be used for a very long period of time in view of the fact that they can stand reat deal of wear and even breakage wit out being rendered useless. Especially is this true as they are not required to beaccurate in shape or form and do not need to conform precisely to the shape or. contour of the forged article to be produced. p v

My i vention may be further briefly summarized as consisting in. certain novel details of construction and arrangements of parts which will be described in the specification and set forth in the appended claims.v I

In the accompanying sheet of drawings wherein I have shown two forms of my invention, Fi ure 1 is a View partly in end elevation partly iii cross section show- Patented Apr. 29, 19119.

ing a composite die embodying my invention; Fig. 2 is a face view of the same; Fig. 3 shows a pair of master dies by which the finishing die of Figs. 1 and 2 is produced by a forging process; Fig. 4c is a View similar to Fig. 1 howing a modification; Fig. 5 is a face view of the same, and Fig. 6 is a view showing master dies by which the finishing die of Fig. 4 and Fig. 5 can be produced by a forging process.

Referring to Figs. 1 to 3, 10 represents a shoe or holder consisting preferably of a block offorged steel which is designed to be secured to the hammer head or anvil of a drop hammer or in suitable corresponding parts of a hydraulic press, the shoe having a dove-tailed shank 11 by which it may be secured in the forging machine. This shoe is provided on its face and near the sides thereof with break-down or roughing-out dies 12 which can be cut in the shoe by hand or by a die sinking machine. The cutting of these roughing-out dies is as compared with the cutting of finishing dies relatively inexpensive, due to the fact that they only approximate the shape of the forgings to be produced. These roughing-out dies are generally, as here shown. intaglio. The shoe is provided at the center with a rather deep groove or recess 13 with undercut sides and at one side thereof with a lateral recess indicated at 14C. Seated in the groove or recess 18 is a finishing die 15 having a finish.- ing pattern 16 in intaglio. This finishing die 15 is provided with tapered sides 1?, the taper corresponding to the taper of the groove or recess 13, and it is provided on one side with a lateral projection 1.8 which fits in the lateral recess 14 as shown in Fig. 2. This die is held in the shoe by the lateral projection 18, and by a key 19 and by these two expedients it is very securely held in place and can undergo the rough usage to which it is'subjected in a drop hammer without becoming loose or shifting.

The finishing die 15 is preferably formed by a forging process invented by me and constitues the subject-matter of companion applications. In this forging. process I employ two .master dies 20 and 21 shown in Fig. 3. These dies are so shaped asto aecurately reproduce the pattern or forge the same in the die, and at the same time shape the side walls and form the lateral. locking projection so that without any waste of material the die is in shape to be effectively secured .in the shoe or holder 10. To cause the pattern to have well forn ed lines and corners, the upper master die may be provided adjacent the-pattern 20 with a retaining wall in the form of a rib or projection 2 0 wholly or partially surrounding the pattern. This causes a depression to be formed in the die which will be subsequently filled with metal Referring now to Figs. 4 to 6, it will be seen that the shoe here designated 25 is provided in its face and along opposite sides with roughing-out or break-down dies 26, and is provided also at the center with a groove or recess27 to receive the finishing die, the groove or recess here shown being considerably deeper than the groove or recess 13 of Fig. 1. The outer part of the recess 27 is larger than the inner part, the inner part being provided with dove-tail or undercut side walls as shown. The finishing die which is shown at 28 and which is removably attached to the shoe or holder is provided with a body 29 having a finishing pattern 29 and at the base thereof with a dove-tail shank 30 which fits into the narrower part of the groove or recess in the shoe and is held therein by a key 131. It will be observed that the sides of the body portion 27 of the finishing die are tapered inwardly from the base toward the face. This leaves between the finishing die and the side portions of the shoe V-shaped grooves or slots.

This finishing die is preferably likewise forged in apair of master dies illustrated in Fig. 6 at 32 and 33. One of the master dies, preferably the upper master die, is provided with a recess ordepression 34: which forms the body portion 29 of the die 28, and the other master die 33 is provided with a depression 35 which forms the shank 30. The depression 34 like the corresponding depression of the upper master die of Fi 3 is provided with inwardly tapering wa ls 36 and the upper master die is provided with a pattern in cameo as shown at 37. The recess 35 in the lower master die 33 is also provided with inwardly tapering side walls, but in order that a dove-tailed shank may be formed from the part of the die formed in the lower master die it is necessary that the sides of the shank thus formed be subsequently tapered or plained into the dove-tail shape shown in Fi 4.

In this manner the finishing dies can be turned out with rapidityand with accuracy and at very little cost compared with the cost of finishing dies for drop hammers and the like produced heretofore. The shoe with. the roughing-out or break-down dies can, as

major portion of the time and expense heretofore required to be expended was due to the accurate cutting of the finishing die.

However, by forming the composite die in this manner. that 1s, with the break-down dies formed in the shoe and with the finishing die formed in a separate member and se cured to the above, the composite die as a whole has considerable life, for as the finishing die becomes worn or is damaged it can be removed, and can be provided with a new finishing die which as beforestated, by my improvedpro'cess, can be formed rapidly and without great expense.

I have here shown in addition to the finishing die two roughing-out or break-down dies, but in the production of certain forgings two finishing dies may not be necessary or more than two may be required. It will be understood, however, that whether there are more or less than two breakdown or roughing-out dies is immaterial.

In forging the dies from the master dies fitted in a drop hammer it is preferable that the body of the die be formed in the upper master die. However, the positions of the dies may be reversed so as to form the body of the die in the lower master die and [particularly is this the case if a forging machine, such as a hydraulic press, isemployed instead of a drop hammer.

Havingthus. described my invention, what I claim, is I 1. A composite die for drop hammers, hydraulic presses and the like, comprising a shoe or holder having spaced side portions with one or more roughing-out dies and having between the side portions a recess, and a finishing die removably secured in said recess and comprising a body having a finishing pattern formed on its face and provided with a locking projection fitting into a suitably shaped. portion of the recess.

2. A composite die for drop hammers, hydraulic presses and the like, comprising a block having on one face means by which the block may be secured in the forging machine and having at its opposite face one or more roughing-out dies and at the side of the roughing-out die having a recess, the recess comprising a main portion and a narrower portion extending therefrom, and a finishing die removably secured in said recess and comprising a main portion occupying the main portion of the recess and having a locking projection secured in the narrower portion of the recess.

3. A composite die for drop hammers, hy

draulic presses and the like, comprislng a block having 011 one face means by which it may be secured'in a forg ng machine and on the opposlte face havlng along the sides thereof a pair of roughing-out dies, a, recess between the roughing-out dies and extending inward from said opposite face, said recess comprising a main portion and a narrower portion extending therefrom, and a finishing die removably secured in said recess and comprisin a main portion with a finishing die pattern on its face, said portion occupyi the main portion of the recess, and at 100 'ng projectlon fitting into said narrower portion of therecess.

In testimony whereof, I hereunto afiix my signature.

ALBERT F. ARTHUR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G."

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