| 摘要 |
PURPOSE:To facilitate manufacture and reduce material cost by a method wherein main cam pieces and camshaft members excluding the main cam pieces are formed with the materials different from each other so as to meet the prescribed properties of the respective members joining onto a shaft member. CONSTITUTION:A joining type camshaft consists in joining a shaft member 1 fittingly attached with main cam pieces 2, journal parts 3, the cam piece 4 for fuel pump drive and the gear 5 thereonto by sintering process as a whole. The camshaft attachment members excluding the main cam pieces are formed of sintering alloys consisting of alloy powder I with a specified weight ratio, graphite as an additive, the amount of which is added so as to obtain the carbon content of 0.5-3.5%, and alloy powder II with a specified weight ratio. The manufacture can be facilitated and yet the material cost can be reduces. |
