Origin Electric Company, Limited

Origin Company, Limited

Yuki Oshino

Yasuo Kadoya

Koji Matsubara

To provide a method and apparatus for manufacturing a joined member that inhibit occurrence of cracks in a joined member even when the joined portion is quenched when members are welded together. The method includes placing the first member D and the second member E with a joint target portion Df and a joint target portion Ef being in contact with each other, welding the joint target portions by heating, subjecting the first member D after the welding to a process for inhibiting occurrence of cracks, and tempering a portion where the first and second members have been welded to each other by electromagnetic heating. The apparatus includes a first electrodeto contact with the first member D; a second electrodeto contact with the second member E; and an induction heating coilfor performing induction heating of a portion where a joint target portions Df and Ef have been contacted and joined to each other, and the induction heating coilis placed between the two electrodesandwhen the induction heating is performed.

Method for manufacturing joined member and apparatus for manufacturing the same

A method for manufacturing a joined member and a joined member manufacturing apparatus which can manufacture a joined member with a joint portion having an appropriate hardness. A method for manufacturing a joined member C by joining a first member D formed of a metal material having a possibility of undergoing quenching and a second member E formed of a metal material, the method includes a contact-placing step Sof placing the first and second members D and E with joint target portions of the first and second members D and E respectively being in contact with each other; a joining step Sof joining the first and second members D and E by passing a pulsed welding electric current Afor joining through the joint target portions J of the first and second members D and E; a first tempering step Sof tempering a joint portion F, where the first and second members D and E are joined, by passing a first tempering electric current Athrough the joint portion F; and a second tempering step Sof tempering the joint portion F by passing a second tempering electric current Asmaller than the first tempering electric current Athrough the joint portion F.

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Saitama, Japan

Yuki Oshino