| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the time required for lathe machining of a light alloy wheel and suppress the occurrence of center misalignment during the lathing operation. <P>SOLUTION: At least twelve cylinder chambers 21, 31 with the same diameter are disposed on a chuck body 10 fixed coaxially with the center of the main spindle of the lathe in the radial direction of the chuck body 10 at equal azimuthal intervals along the circumferences of two cross sections perpendicular to the center axis. Pistons 22, 32 are operated by the pressure fluid supplied into the cylinder chambers 21, 31. The light alloy wheel chucking device comprises a flexible power chuck which subjects the inner peripheral surface 4 of the rim member (A) to compensation gripping, and a retraction type chuck whereby the hub mounting section C is centered and gripped, and whereby subsequently, the inside surface 2 of the disk section D is retracted to a reference plane of the chuck body 10 and is brought into close contact with the reference plane. It is made possible to machine the whole area of the outer peripheral surface 3 of the rim member (A). <P>COPYRIGHT: (C)2012,JPO&INPIT |
