我们在加工定轴时，其数量达万件以上，按常规要用鸡心夹头进行上下装夹才可加工，既浪费了工时，又增大了劳动强度。为此我们自制了一套顶针夹头装置，安装在车床主轴内孔即可使用。 １结构 （１）顶针夹头由莫氏锥度夹头座１、顶针体６、夹爪３（圆周上三爪均布）及弹簧８等 When we process the fixed axis, the number of more than 10,000, according to the conventional use of the center of the chuck chuck can be processed from top to bottom, not only wasted working hours, but also increased labor intensity. To this end, we made a set of thimble chuck device, installed in the lathe spindle hole can be used. 1 structure (1) thimble chuck Morse taper chuck base 1, the thimble body 6, the jaws 3 (circumference three claws are uniform) and the spring 8 and so on