在大加工如图1的叉形工件上的小横孔时,可以采用如图2的夹具。这夹具的特点是結构簡单、装卸工件方便和迅速,可以大大减少辅助时間。图2中,1是夾具体,它由两块鋼板焊接而成。2是压板,一端装有蝶釘3和彈簧4。这螺釘3紧固在夹具体上,但压板2可繞这彈簧轉动。5是定位圓柱。6是导銷。7是两块方铁。 When machining a small horizontal hole on the forked workpiece as shown in FIG. 1, the fixture as shown in FIG. 2 may be adopted. This fixture is characterized by simple structure, loading and unloading work pieces quickly and easily, can greatly reduce the auxiliary time. Figure 2, 1 is a clamp body, which consists of two welded steel plate. 2 is a pressure plate, one end with a butterfly stud 3 and spring 4. The screw 3 is fastened to the clamp body, but the pressure plate 2 can rotate about this spring. 5 is the positioning cylinder. 6 is the guide pin. 7 is two square iron.