くさび式パワーチャックの把握性能 : 生つめ把握部形状の影響

抄録

In order to investigate the effects of the shape of the top-jaw gripping surface on the chucking performance of a wedge-type power chuck, bending tests and gripping tests in the chuck-work system were performed. The investigation showed that the bending stiffness in the unloading process increases ( i ) when the diameter of the top-jaw gripping surface is a few millimeters smaller than the work diameter, ( ii ) when the gripping force is adjusted to the gripping area of the top jaw, or (iii) when the work is gripped at the base of the top jaw. Although the fluctuation of the bending stiffness in the loading process depends on the shape of the top-jaw gripping surface and the bending load direction to the top jaw, the absolute value significantly decreases with the gripping force. There is no effect of the shape of the top-jaw gripping surface on the gripping accuracy.