Title:
POPPET VALVE FOR ENGINE AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2001193422
Kind Code:
A
Abstract:
To manufacture a stem of a poppet valve by plastic working for lightening the weight of the poppet valve.
The poppet valve is divided into a shaft shaped stem and a disk shaped valve plate which are welded with each other, and the stem is composed of a cylindrical shaft part molded through plastic working, a wall thickness cotter end formed on one end of the shaft part, and a wall thickness flare part formed on the other end. The stem is manufacture, in such a way that a steel plate is formed in a stepped cylindrical pipe through throttle working, and its stepped part is extended into an elongated shape.
Inventors:
NOGUCHI SHINJI
SHIRAYANAGI ISAO
SHIRAYANAGI ISAO
Application Number:
JP37336399A
Publication Date:
July 17, 2001
Filing Date:
December 28, 1999
Export Citation:
Assignee:
SHIRAYANAGI ISAO
NOGUCHI SEISAKUSHO KK
NOGUCHI SEISAKUSHO KK
International Classes:
B23K20/12; F01L3/20; (IPC1-7): F01L3/20; B23K20/12
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