曲柄零件(图1)应用较广,虽结构各异,但曲柄或拨叉多数为R_1≠R_2,且B面平行于A面,零件小而薄(孔距在30～80mm之间,厚度8～16mm)。规格多,又是铸件,所以在单件小批铣、刨生产时装夹困难.为此,我们用简易夹具解决了困难。 Crank parts (Figure 1) are widely used, although the structure is different, but the majority of the crank or fork R_1 ≠ R_2, and B parallel to the A surface, small and thin parts (pitch 30-80mm, the thickness of 8 ~ 16mm). Many specifications, but also castings, so small single-piece milling, planing production folder difficult.To this end, we use simple fixtures to solve the difficulties.