零件的斜孔(见图1)在车床上采用正向加工,由于斜孔距左端面很远,并受位置尺寸的限制,只能用细长的刀杆进行加工,孔的精度及光洁度均得不到保证。后改用图2结构的车夹具进行反向拉削加工,保证了工件的精度。用此夹具,刀杆可相应缩短和加粗,夹具的重量可减轻。一、夹具设计 1.该夹具主要由夹具体8,定位套10,支座4,压紧及平衡元件等组成(图中工件两侧的压紧元件未画出)。夹具体8是夹具的关键件,见图3。其上面有 The oblique hole of the part (see Figure 1) is machined in the lathe. Because the inclined hole is far away from the left end face and is limited by the position and size, only the slender arbor can be used for machining. The precision and finish of the hole Can not be guaranteed After the switch to Figure 2 structure of the car clamp reverse broaching process to ensure the accuracy of the workpiece. With this fixture, the arbor can be shortened and bold, and the weight of the fixture can be reduced. First, the fixture design 1. The fixture mainly by the clamp body 8, positioning sleeve 10, bearing 4, pressing and balancing components (the workpiece on both sides of the pressing member is not shown). Clamp 8 is the key to the fixture, see Figure 3. It’s above