| 摘要 |
A method for manufacturing a firm and rigid cam-cam shaft assembly, which comprises the steps: (a) molding a component having through-hole therein from a material of an alloy to be sintered, said material allowing the first ratio of the contraction of the inner diameter of the component at joining portion when the component is singly sintered to the inner diameter thereof before sintering to be more than 2%; (b) presintering said component; (c) assembling said component onto a metal shaft such that said metal shaft may be inserted into said through-hole; and (d) sintering said component assembled onto the metal shaft, whereby the joining of the component to the metal shaft is carried out in such a manner that the second ratio of the difference between the outer diameter of the metal shaft and the inner diameter of the contracted component after sintering to the outer diameter of the metal shaft is more than 2%. |
