US796223A

US796223A - Process for the manufacture of seamless metallic hollow bodies by means of matrix and die.

Info

Publication number: US796223A
Application number: US16488203A
Authority: US
Inventors: Georg Kaub
Original assignee: Fried Krupp AG
Current assignee: Fried Krupp AG
Priority date: 1903-07-09
Filing date: 1903-07-09
Publication date: 1905-08-01
Anticipated expiration: 1922-08-01

Description

i c1503.: 7 raoonss FOR THE MANUFACTURE OP-SEAMLESS METALLIC" HOLLOW BODIES, I I

BY MEANS OF MATRIX 'ANDDIE JULY 9,1003.

Arnmmmn rum) 'z' 011.

UNIT STATES GEORG KAUB,

PATENT orrion.

OF ESSEN-O N-THE-RUHR, GERMANK ASSIGNOR TO' FRIED. KRUPP, OF ESSEN-ON-THE-RUHR, GERMANY.

PROCESS FOR THE MANUFACTURE OF SEAMLESS METALLIC HOLLOW BODIES BY MEANS OF MATRlX AND DIE.

To all whom it may concern.-

Be it known that L'GEORG KAUB, a'subject of the Emperor of Germany, and a resident of Essen-on-the Ruh r, Germany, have invented certain new and useful Improvements in -Processes for the Manufacture of Seamless Metallic Hollow Bodies by Means of Matrix and Die, of which the following is a specification.

The invention relates to the process of manufacturing seamless, metallic hollow bodies in which a heated metallic block is introduced into a matrix and perforated by means of a Figures 1, 3, and4 are vertical sectional.

views showing progressive steps in the process of punching out a core by the present process in the manufacture of a seamless hollow metallic body, and Fig. 2 is a horizontal section on the line 2 2 of Fig. 1. Figs. 5 to 10, inclusive, are horizontal sectional views suggesting some of the various forms of seamless bodies that may be produced according to the present invention.

Referring more particularly to Figs. 1 to 4:, which relate to the production of a hollow cylindrical body, A represents the matrix, which is turned out in the form of a cylinder with such an internal diameter as will permit the metallic block to fit accurately within it.

In the base of the matrix is provided an opening a, which is covered by a plate of, Figs. 1 and 2. Above the matrix is the press-die B, secured to the piston of a hydraulic press or the like. This press-die is constructed with an annular transverse section and is so guided in its movements that it remains coaxial with the matrix. After the heatedmetallic block C is introduced into the matrix, as shown in Fig. 1, the press is put under pres- Specification of Letters Patent. Application filed Jul 9,1903. Serial No. 164,882.

' Patented Aug. 1, 1905.

sure and the die I) presses. gradually into the work (1. By the penetration of the die a portion opening a of. the matrix and raises the plate (4 Finally the core o is removed in a suitable manner-as, for instance, by the use of a hollow drill or by punching out the base.

This core might also be removed in the pressing operation by a special construction of loase-plate. Such an arrangement is shown in Fig. 4, wherethe' base-plate a is provided with a recess a in which the end of the pressdie may enter at the completion of its stroke. In this way, it will be observed, the core 0 is sheared offfrom the material of the tubular wall, so that a hollow tubular body results from the simpleaction of the press.

If it is desired to produce a hollow body closed at one end, the press-die is caused to penetrate to a point distant from the baseplate a corresponding to the strength desired for the closure of the end of the bore, and the core 0' is then separated from the basein a suitable manneras, forexample, by the use of wedges.

From the foregoing description of the invention it will be obvious without further description that in comparison with a solid pressdie a hollow die, by reason of its lesser volume for a given diameter, requires a very much less pressure and expenditure of work. Consequently smaller presses .may be employed for the manufacture of comparatively large tubular bodies. A further advantage arises from the use of a hollow press-die in that with cast metallic blocks from which it is desired to construct seamless tubular'bodies by pressing the central portion of the block, which often contains porous metal or imper fections, is removed by the hollow press-die.

and only sound material is forced into the walls of the completed article.

Obviously the cross-section of the article to be produced may beof any desired shape by suitably selecting the form of the matrix and of the die. Various shapes are suggested in Figs. 5 to 10, inclusive. It will be observed that the exterior form need not correspond with the interior and also that the metallic block introduced into the matrix before pressing need not correspond with the form of the matrix. A round block might be introduced ;into a square matrix, as shown in Fig. 6, or

a square block can be introduced into a round matrix. In such cases the pressing operation will cause the metal to How into the unfilled space or spaces between the block and the matrix.

In presence of PETER LIEBER, WILLIAM Essnnwnm.