Title:
CAMSHAFT AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPH03275908
Kind Code:
A
Abstract:
PURPOSE:To obtain a camshaft having a superior abrasion resistance by manufacturing the nose part of a cam piece through the powder molding of the abrasion resistive alloy powder and forming a ring part by the abrasion resistive alloy having high toughness and sintering-joining the nose part on the ring part and shrinkage-fitting the nose part on a shaft member. CONSTITUTION:The abrasion-resistive alloy powder is molded into powder molding through pressurization compression by a powder molding die and the upper and lower punches, and a nose part 3a is manufactured. In parallel with this operation, a ring part 3b is manufactured by the alloy material having high toughness and high abrasion resistance, e.g. SCM435 through machining. The nose part 3a is brought into contact with the outer peripheral part of the ring part 3b, and sintering processing is carried out in a furnace in nearly vacuum state, and a cam piece 3 is obtained. Then, the inside diameter of a through hole 3c on the cam piece 3 is cutting-worked, and then heated, and a shaft member 1 is inserted, and shrinkage-fitting is carried out. Accordingly, the shrinkage-fitting into the cam piece free from the generation of crack can be carried out, and the camshaft having a superior abrasion resistance can be manufactured at a low cost.
Inventors:
YOSHIMOTO KAZUYUKI
OSAKI SHIGEZO
YAHATA SHIGEO
TOKOSHIMA TERUHIKO
OSAKI SHIGEZO
YAHATA SHIGEO
TOKOSHIMA TERUHIKO
Application Number:
JP7851790A
Publication Date:
December 06, 1991
Filing Date:
March 26, 1990
Export Citation:
Assignee:
MAZDA MOTOR
HIROSHIMA ALUMINIUM KOGYO
HIROSHIMA ALUMINIUM KOGYO
International Classes:
B23P11/02; B22F5/00; B22F7/08; F01L1/04; F16H53/02; (IPC1-7): B22F7/08; B23P11/02; F01L1/04; F16H53/02
Attorney, Agent or Firm:
Toshio Okamura