US627557A - Drawing-die. - Google Patents

Description

Patented June 27, I899.

F. L. WHITE.

DRAWING DIE.

(Application filed Apr. 26, 1898.)

(No Model.)

Inventor.

Witnesses.

I Attorneys mg npnms mini co, mdmpma. WASHINGION n c UNITED STATES PATENT QFFICE.

FREDERICK L. WVHITE, OF WVATERBURY, CONNECTICUT, ASSIGNOR TO GEORGE H. CLOWES, OF SAME PLACE. I

DRAWING-DIE.

SPECIFICATION forming part of Letters Patent No. 627,557, dated June 27', 1899.

Application filed April 26, 1898.

To all whom, it may concern.-

Be it known that I, FREDERICK L. WHITE, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Drawing- Dies, of which the following is a specification reference being had therein to the accompanying drawings.

My invention relates to reducing or draw; ing dies for use in a draw-bench, its object being to construct the Wearing parts of the die separable from the die-body.

To this end my invention consists of the sectional drawing-die having certain details of construction and combination of parts, as will be hereinafter fully set forth and more particularly pointed out in the claims.

Referring to the drawings, in which like numerals designate like parts in the several views, Figure 1 is a front elevation of the die complete. Fig. 2 is a plan view thereof. Fig. 3 is a side elevation of one portion of the die-block, the end die-plates being in section. Fig. 4 is a transverse section of Fig. 1 upon line A B and showing a cross-secti'onof the die bed or shoe.

This die is designed to be used for drawing long strips of metal of a rectangular crosssection or for drawing-bars having converging sides, such as commutator-bars. The die is fastened to the head of the draw-bench by any of the methods common to the art, the numeral 7 in the drawings illustrating one form of a die bed or shoe for holding the same."

Drawingdies as heretofore constructed have been made from a single piece of metal in very much the same manner as cuttingdiesthat is, having a central hole 'of the size and shape of the finished strips-through which the strip is drawn. This manner of construction is objectionable and expensive owing to the rapid wear of the die-faces. When the die-faces become worn sufficiently to alter the size of the die, the die is annealed, then upset, and finally brought to its original size and shape by filling. This process is repeated several times until the die becomes so worn as to be useless.

The die is frequently destroyed by the hardening process, and this is especially apt Serial No. 678,853. (No model.)

the die-block in sections and attachingthereto a plurality of die-plates which can be easily and quickly taken out and repaired when worn, thus greatly facilitating and cheapening the drawing process.

In the drawings the two halves of the dieblock are designated 1 1, the outer edges thereof being beveled, as is common in dieblocks, and the inner faces abutting against each other and having therein the oppositelydisposed recesses 2 2.

The numerals 3 3 and 4 4t designate th side and end die-plates, respectively, which are madefrom a single piece of metal. The inner faces of the said die-plates are rounded from front to rear to form the segment of a circle and have an overhanging upper portion which rests upon the die-block, the side die-plates 3 3 being rigidly fastened thereto by the screws 5 5% which pass through the said overhanging portion into the die-block.

. The end die-plates are held against the side die-plates by the screws 6 6,which bear against the said end plates and are threaded in the two portions of the die-block, as illustrated in the drawings. There is much less space between the side die-plates at one end than at the other, thus showing the respective positions of thesaid plates when the die is designed for drawing commutator-bars; but it can be'readily seen, however, that the .faces of the said die-plates can be parallel within my invention.

When the faces of the die-plates become Worn, the die-plates are taken out and fastened on a grindingarbor and regroundto their original shape without annealing, after which they are again replaced in the die-block.

To compensate for the amount of stock taken oi the side plates,a like amount is taken off the abutting faces of the two portions of the die-blocks, which when brought together again allow the side die-plates to occupy the same relative positions as before. The stock taken from the abutting faces amounts to so little that the holes for the screws 6 are not materially afiected; but after the faces have been reduced several times the holes are reamed and tapped as originally done.

I do not limit myself to any exact form of die-block, the particular shape or' form of which being immaterial within the spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a drawing-die, in combination with a die-bed and atwo-part die-block secured thereto, the adjacent edges of the two parts of said block being recessed, a plurality of die-plates fastened to said die-block, one or more of the said die-plates being adjustable on said dieblock toward or away from the oppositelydisposed die-plate, substantially as described.

2. In a drawing-die, in combination with a two-part die-block, a base or frame having means for securing the said die-block thereto, side die-plates fastened to each of said dieblocks, end die-plates loosely mounted in said die block and held against the said dieplates by abutting screws, substantiallyas described.

3. I11 a drawing-die, in combination with a die-bed and a two-part die-block having oppositely-disposed recesses in their abutting faces, side die-plates fastened to the said dieblock, one portion of which projects into the said recess, end die-plates loosely mounted in the said die-block and projecting into the said recess adj listing-screws abutting against the said end plates for the purposes herein set forth, substantially as described.

a. In a drawing-die, in combination with a two-part die-block, a base or frame having means for securing the said die-block thereto, a side die-plate fastened to each of said dieblocks, end die-plates loosely mounted in said die-block, all of the said die-plates having inner faces formed in segments of a cylinder, substantially as described.

5. In a drawing-die, in combination with a die-bed 7 and a two-part die-block 1 1 having abutting faces, side die-plates 3 3 fixed to said die-blocks] 1, end die-plates 4 4 and adjusting-screws 6 6, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

FREDERICK L. IVIII'IE.

Vitnesses:

GEORGE E. HALL, Enw. S. GOODMAN.

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