| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a pulley for a continuously variable transmission which can easily form a cylinder part after carburizing and quenching, when the cylinder part is formed integrally from a movable flange workpiece. SOLUTION: The pulley for the continuously variable transmission comprises a stationary flange 6 fixed to a rotary shaft 5, a movable flange 7 reciprocally movable in the axis direction of the rotary shaft 5, and the cylinder part 9 to form a pressure chamber 11 arranged integrally in the movable flange 7. The movable flange workpiece 21 with a preparatorily shaped part 23 to form the cylinder part 9 is formed by hot forging. The movable flange workpiece 21 is subjected to carburizing and quenching after the preparatorily shaped part 23 is attached and covered with a thermal conduction restraining jig 24. After the thermal conduction restraining jig 24 is detached, the heat hardened part in the surface of the preparatorily shaped part 23 is removed. The preparatorily shaped part 23 after the removal of the heat hardened part is drawn into the cylinder part 9. The thermal conduction restraining jig 24 is attached to the preparatorily shaped part 23 having a decarburization agent layer 26 between them. COPYRIGHT: (C)2005,JPO&NCIPI
|
