如图1所示的零件,内球面尺寸为SΦ1460H8,图1　零件图要求表面粗糙度Ra=3.2μm。我们在没有数控车床、专用球车和仿形车床的情况下,使用双柱立式车床并设计了如图2所示的专用夹具,用车削完成了零件内球面的加工。专用夹具如图2所示,其工作原理是:右刀架带动右刀杆架向下移动,使 Parts shown in Figure 1, the inner sphere size SΦ1460H8, Figure 1 parts drawings required surface roughness Ra = 3.2μm. In the absence of CNC lathes, golf carts and profile lathes, we used double-column vertical lathes and designed the special fixtures shown in Figure 2 to complete the machining of the inner spherical parts. Special fixture shown in Figure 2, its working principle is: Right knife holder driven right knife holder to move down so that