US144969A - Improvement in machines for forging hammers - Google Patents

Description

w.. EVANS.

Machines for Forging Hammers.

Patented Nov. 25,1873.

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UNITED STATES PATENT OFFICE.

WILLIAM EVANS, OF LONG ISLAND CITY, NEW YORK.

IMPROVEMENT IN MACHINES FOR FORGING HAMMERS.

Specification forming part of Leiters Patent No. 144,969, dated November 25, 1873.; application filed October 25, 1873.

To all whom t may concer/n:

Be it known that I, WILLIAM EvANs, of Long Island City, in the county of Queens and State of New York, have invented a new and Improved Method of Forging Hammers 5 and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawings formin gA part of this specication, in which- Figure l is a perspective view of my improved machine. Fig. 2 is a sectional view, showing the mea-ns for adjusting the die-hold ers. Figs. 3, 4, 5, 6, 7, S, 9, 10, 11, and 12 are views, showing the dies used in the diiferent stages of the process. Fig. 13 is a perspective view of the shears for cutting 0E the end of the head; and Fig. 14, a plan view of the jaws for holding the blank while being punched.

Similar letters of reference in the accompanying drawings denote the same parts.

This invention has for its object to forge hammers in a cheaper, better, and more rapid manner than has heretofore been done; and to this end it consists in the peculiar formation and arrangement of a series of divided dies adapted to give the hammer its proper form by successive stages, the lirst pair of the series giving a rough outline to the steel blank, which is gradually finished by the rest, the upper half of each die being reciprocatcd vertically by a suitable mechanical contrivance. It also consists in the method of forging hammers, all of -which I will now proceed to describe. l

In the drawing, A represents a suitable bedplate, on which the lower half of each die is received, and from which, at each end, rise vertical standards B. C represents a shaft having its bearings in the standards B, and provided at each end with a cog-wheel, D, which latter meshes with pinions E on the drivingshaft F above the shaft C, this being operated from the main driving-shaft by belting the latter to suitable pulleys. On the in ner sides of the standards I5 are vertical guides I, in which slides a horizontal cross-head, J. This latter is reciprocated vertically by eccen tries K K on the shaft C, said eccentrics being connected with the cross-head by rods K K. From the lower side of the cross-head J de pend vertical tapped tubes L, which are so attached to the cross-head as to turn freely, and are provided with orifices for the insertion of a turning-handle. These tubes pass through orifices in a stationary horizontal guide-block, M, and into their lower ends extend screw stems N on the upper die-punch and shearholders O O1 02. The bed A .and die-holders O are provided with dovetail mortises, by means of which the correspondingly dovetailed dies are attached in pairs, as shown in Fig. 1, and the punch and shear-l'lolders 0102 have similar mortises, in which the punchl? and upper shears R are held. The dies are shown in detail in Figs. 3, 4:, 5, 6, 8, 9, l0, 11, and 12, and are for making machinists ballpene hammers. A1 A2 represent the rst pair of dies which give the first blow to the steel blank from which the hammer is formed, and impart a rough outline to the same. The second pair, Bl B2, next indent two sides of the blank, and take the iirst step toward forming the at sides. The blank is now placed in the holding-guide C', which is located under the punch P, and slides on a transverse dovetail guide on the bed A. A pair of spring-jaws, S, are pivoted 011 the bed A, so as to project over the guide C and grasp the blank on each side, and hold the same while the punch is be ing withdrawn. The surplus metal is now cut from the end of the head by the shears It R', and the blank *passed to the first finishing dies Dl D2, which shape the edges of the hammer and impart the rst angles. The succeeding pairs, El E2 F1 F2, complete the formation of the sides and head of the hammer, the blank Vhaving a pin inserted in its eye while in these dies, thus preventing the filling of the latter. The dies El E2 are provided with convex faces e, which act as fullers, pressing the metal outward from the center of the hammer and forcing it into all other parts of the die, while the dies F1 F2, having dat faces f, complete the sides and give the finishing touch. By this method, a hammer can be forged at one heating, the dies being located in the most convenient manner, and operated simultaneously. Hence, the steel is not injured by repeated heatings, and the whole process can be atl tended to by one operator. The upper hold ers can b e adjusted independently by turning ing out the metal and perfecting the contour of the hammer, substantially as described.

3. Themethod of making hammers from a steel blank by subjecting the blank, rst, to the outlining-dies; secondly, to the convex dies for indenting the cheeks thirdly, to the punch.; fourthly, to the shears; ifthly, siXthly, and Seventhly, to the iinishing-dies, substantially as described.

WILLIAM EVANS.

Witnesses MELVILLE CHURCH, W. READ.

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