撥动夾头是用四个或六个撥爪嵌入工件端面(約0.5～2公厘)来帶动工件旋轉的。它代替了普通的撥盤和鷄心夾头。但由于撥动夾头的撥爪是嵌入工件端面的,所以它受力較大。所以撥爪必須經过淬火。如果撥爪淬火硬度不够,那末这几个爪就很容易磨損;如果淬火硬度过高,又容易碎裂,影响安全。为了解决这个問題,我厂金工車间技术员周和根同志,改进了一个如 Toggle chuck is the use of four or six claws embedded in the workpiece end (about 0.5 to 2 mm) to bring the workpiece rotation. It replaces the ordinary dial and the heart-shaped chuck. However, as the claw toggle chuck is embedded in the workpiece end face, so it is force. So the dial must be quenched. If the dial quenching hardness is not enough, then these claws are very easy to wear; if the quenching hardness is too high, but also easily broken, affecting safety. In order to solve this problem, I workshop mechanic Zhou Hegen comrades, improved a