US1410093A - Method of forming metal-hubbed articles - Google Patents

Description

T. D. DALLMEYER, G. G. BROWN, A SCHULTZ. METHOD OF FORMING METAL 0 ARTICLES. APPL'CAUON FELED MAR 22,19l9- 1 1E JED JUNE 16, 192]. 1,410,093 Patentea Mar. 21, 1922.

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UNITED STATES PATENT OFFICE.

THOMAS D. DALLMEYER, OF PITTSBURGH, AND GOUVERNEUR G. BBDWN AND JAMES R. SCHULTZ, 0F OAKMONT, PENNSYLVANIA, ASSIGNORS TO VALLEY FORGING C OM- PANY, OF OAKMONT, PENNSYLVANIA, A CORPORATION OF DELAWARE METHOD OI FORMING METAL-HUBBED ARTICLES.

Specification of Letters Patent. Patented 21, 1922.

Application filed March 22,1919, Serial No. 284,456. Renewed June 16, 1921. Serial No. 478,215.

1 0 all whomit may concern Be it known that we, THOMAS D. DALIr MEYER, GoUvEnNnUR G. Brown, and JAMES R. SCHULTZ, who are citizens of the United States, and residents of Pittsburgh and Oakmont, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Methods of Forming Metal-Hubbed Articles; and we do hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to a method of forming metal articles having hubs or enlargements formed integral therewith.

The object of our invention is to provide a method of forming such articles from an elongated billet, the pressure being so applied that the metal surrounding the hub portion is permitted to flow outwardly to the desired size and thickness whereby the strains on the metal due to a sudden upsetting blow are avoided and the breaks or fractures at the points where the hub unites with the body of the article are practically eliminated.

To these ends ourinvention consists, enerally stated, in inserting the heated billet or blank endwise within .dies permanently spaced apart, the end of said blank to which pressure is to be appliedbeing confined in one of said dies, and applying pressure to the confined'end of said blank and causing the metal to flow outwardly into the space between said dies.

In the accompanying drawing the figures 1, 2, 3, 4 and 6 indicate the diiferent steps in' the operation of our improved method In the manufacture of articles of different shapes, and Figs. fraud 7 show a perspective view and a sect-ion, respectively, of articles made byour method.

In Figs. 1, 2 and 3,'the numeral 2 designates the upper die and 3 the lower die separated by intervening space 4. The lower die has the recess 5 and the upper die has the bore 6 which may be lined with a re- A suitable ram or plunger 8 is adapted to operate in the bore 6.

In making an article such as shown in Fig. 5, the heated billet 9 of the required size to form the article is inserted in the dies, the lower end of said billet resting in the bottom of the recess 5 and-being of the same or substantially the same area as said bottom. The walls of therecess 5 are slightly flaring to give the hub a slightly comcal shape.

The billet 9 extends into the bore 6 of the upper die and when the ram or plunger 8 is advanced pressure is applied endwise of the billet'or blank 9, and as said plunger advances the metal of the blank first fills the lower recess 5 and the bore 6, as shown in Fig. 2, before the metal begins to flow outwardly. Further pressure applied by the ram 8 then causes the metal to flow into the space 4 between the dies, the metalgradually flowing out so that the strain on the metal is relieved and the working of the metal takes place to give it a homogeneous structure. This gradual flow of the metal prevents the setting up of severe strains and stresses and avoids cracks and weak spots at the juncture of the body portionof the article with the hub, which is liable to take place in the ordinary upsetting by hammering where the metal is subjected to a series of violent blows in quick succession.

In Fig. 4 we have illustrated our method as applied to making a different form of article from that shown in the previous figures, in which the lower die 10, as shown smaller recess 16 to allow for perforating the hub portion 17 by the action of the ram 18. Y

It is apparent that many other articles of many different shapes may be formed by our method, and we do not limit ourselves to any particular form or shape of dies.

While we have illustrated and described our invention in connection with dies, termed upper and lower, it will be understood that we. do not wish to limit ourselves in any way to dies moving in a vertical plane, as the dies might be arranged to move horizontal without in any way effecting the method. By the word outwardly as used in the specification and claims we mean broadly the outward flow of the metal, irrespective of whether the flow is at right angles to the axial line of the plunger, as illustrated in the drawing. 7

What I claim is:

j 1. The method of forming metal articles with hubs or enlargements consisting in inserting the heated blank endwise within dies" permanently spaced apart, the end of said blank to which pressure is to be applied being confined in one of said dies, and applying pressure to the confined end of said blank and causing the metal to flow outward lly into the space between said dies.

he method of forming metal article's having hubs or enlar ements consisting in inserting the heated lank endwise within dies permanently spaced apart, the end of THOMAS D. DALLMEYER. GOUVERNEURG. BROWN. JAMES R. SCHULTZ.

Witnesses:

CHAS. A. CARPENTER,

HYA'I'I' M. ORIBBS.

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