| 摘要 |
PROBLEM TO BE SOLVED: To prevent rotation of a workpiece when the workpiece is pushed down as it is held in a workpiece holding device even when the workpiece is a helical gear in the workpiece holding device to be used for correction in powder metallurgy. SOLUTION: At shaft-symmetric positions in a cylindrical part 22 of a workpiece holding device, a pair of horizontal open grooves 25 opened in an inner circumferential surface of the cylindrical part 22 are formed. Support rods 26 are respectively assembled with the open grooves 25 to be movable in the diametric direction of the cylindrical part 22. The support rods 26 are energized in such as direction as to be protruded from the open groove 25 into the cylindrical part 22 by springs 29. A workpiece such as a helical gear is placed on the support rods 26 to be supported. Compared with case the where the workpiece is supported by a ball, such nonconformity that the ball gets in between trough parts of gear parts to rotate the workpiece to impair its directivity is not generated when the workpiece is pushed down.
|
