Title:
MANUFACTURE OF CAM SHAFT
Document Type and Number:
Japanese Patent JPS6251704
Kind Code:
A
Abstract:
PURPOSE:To enable mass production of a cam shaft having excellent durability, by a method wherein a cam profile member is formed by a sintered alloy, the cam profile member and an iorn pipe core are arranged in a casting, and during the arrangement, a molten aluminium alloy is poured. CONSTITUTION:A previously manufactured cam profile member 1 made of a sintered alloy, a bearing member 2 made of FRM, e.g. carbon fiber, and a cast iron pipe core 3 formed in the shape of a cylinder by rounding a steel sheet, are secured to three pairs of split cores 4a-4c, respectively. A molten aluminium alloy is poured in a mould formed with the split cores 4a-4c to manufacture a cam shaft 6. In the cam shaft 6 so manufactured, a shaft part 7 is formed using an aluminium alloy, and the cam profile member 1, the bearing part 2, and the shaft part 7 are integrally constituted. Since a shaft size (l) at a cam nose part 10 is longer than a shaft size (r) at a portion except the cam nose part 10, effective torque can be increased, and this enables improvement of durability of the cam nose part 10.
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Inventors:
TSUZUKI YOSHIHIKO
Application Number:
JP19268685A
Publication Date:
March 06, 1987
Filing Date:
August 31, 1985
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01L1/04; B22D19/00; B22F5/00; B22F7/08; F01L1/047; F16H53/02; (IPC1-7): B22D19/00; B22F7/08; F01L1/04; F16H53/02
Attorney, Agent or Firm:
Kaname Yumi
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