我厂承接一批PZ60—8型灰砂砖机球面轴瓦的加工任务,材料ZQSn6—6—3,结构如图1所示,为对合轴瓦,内孔呈半封闭型内球面。在这种情况下用一般摆动式的刀杆车内球面夹具就无能为力了。最初我们用样板车刀加工,每班只能车二、三件,精度不能保证,工人的劳动强度也大。为此,我们设计了一套双曲柄机构车内球面夹具,经实践证明效果很 I plant to undertake a number of PZ60-8 type sand sand brick machine spherical bearing processing tasks, materials ZQSn6-6-3, the structure shown in Figure 1, for the joint bearing bush, the hole was semi-closed type of spherical. In this case with the general swing arbor interior ball fixture can do nothing. At first, we use the model lathe processing, each class can only car two or three, the accuracy can not be guaranteed, the labor intensity of workers is also large. To this end, we have designed a double crank mechanism car spherical fixture, the practice proved very effective