WORKING METHOD OF METAL END PART CROSS-SECTIONAL OUTER PERIPHERY AND JOINING METHOD OF METAL COMPONENT OBTAINED BY THE WORKING METHOD AND ANOTHER MEMBER

Japanese Patent JP2016124084

A

PROBLEM TO BE SOLVED: To provide a working method of a metal end part cross-sectional outer periphery capable of easily forming at least any of a deep groove, a deep recess, and a flange which are smooth and uniform in the longitudinal direction of a metal rod or metal pipe in the cross-sectional periphery of any of the end part of the metal rod or metal pipe, the drawn end part of the metal rod or metal pipe, and the hub hole forming part of the metal pipe; and to provide a joining method of a metal component obtained by the working method and another member.SOLUTION: A working method of the present invention includes consecutively repeating press forming operation multiple times to advance splitting by using a splitting punch in which a tip part has a sharp cutting edge, and the cutting edge is formed so as to have a shape equal to or partly equal to the outer shape of the cross section of a metal end part and so as to have a diameter smaller than the outer diameter of the cross section. In order to control the depth of metal cracking which occurs in each press forming operation, a pressing die for holding the outside of a metal rod or at least a pressing die on one side of pressing dies for holding the inside and outside of a metal pipe is arranged while its position is moved according to the distance of a split portion.SELECTED DRAWING: Figure 1

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SEKI MASAKATSU

JP2015001319A

July 11, 2016

January 07, 2015

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SEKI PRESS CO LTD

B23P13/04; B21D19/08; B21D39/00

Eguchi State

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