加工轴销类零件及带有圆弧面的零件(如连杆等)时,广泛使用V形块作定位元件。V形块虽不复杂,但制造工艺比较麻烦,不仅周期长,而且精度不易保证,安装调整也不方便。特别是在某些场合下,使用V形块作定位元件很难使夹具结构趋于紧凑。为此,我们在用双圆柱代替V形块作定位元件的 V-shaped block is widely used as a positioning element when processing shaft-type parts and parts with a circular arc surface (such as connecting rods). Although V-shaped block is not complicated, but the manufacturing process is too much trouble, not only long cycle, but also difficult to ensure accuracy, installation and adjustment is not convenient. Especially in some occasions, the use of V-shaped positioning element for the fixture is difficult to compact structure. To this end, we are using double cylinders instead of V-blocks as positioning elements