Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1980-04-01
1982-03-02
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
219 67, 219 7813, 2191171, B23P 1500, B23K 1102
Patent
active
043172679
ABSTRACT:
This invention is made with a view to increasing the fusing strength of an end piece in a valve moving push rod for internal combustion engines. The fusing part of the push rod according to the present invention consists of an .alpha.-martensite structure and a primary truestite structure in a cotransition boundary range of a segmental section formed into the hardened layer of the end piece from the fused boundary surface of the end piece with a tube end part and is provided with a tough mixed layer arcuated from the inside end part of the above mentioned fused boundary surface to the outside end part thereof. This mixed layer is obtained by reducing by a heat feeding means a quick temperature drop caused by the fusing part simultaneously with cutting off the fusing current in welding by electric resistance the end piece on the fixed side surface to the peripheral edge of the end port of a tube material. Such crack as is recognized in the fusing part of a conventional product is not recognized in a product obtained by reducing the quick cooling by this method.
REFERENCES:
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Metals Handbook, "Welding and Brazing," American Society for Metals, Metals Park, Ohio, 1971, vol. 6, 8th Edition, pp. 414, 415.
Gillette, R. T., "Resistance-Welding Laboratory Facilities," from General Electric Review, Jul. 1945, pp. 26-29.
Casella Anthony J.
Crane Daniel C.
Usui Kokusai Sangyo, K.K.
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