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气缸套机加工,选用 C7632多刀半自动卡盘车床,在切削靠近主轴法兰端面时,（图1）α要想在一次定位装夹中完成工件的总长、切支承肩台阶端面的加工,就会遇到轴向如何准确定位的问题。 由于该工序,被加工工件的内孔只经过粗扩加工,而夹具采用的是如图1 所示的自动定心涨簧夹具。首先我们来分析一下轴向误差定位问题,假定每次装上的缸套大端面,都理想地在垂直于夹具轴线的某一横剖面内,在这种情况下夹紧后造成的轴向定位误差值是多大呢?可推导如下:
Cylinder liner machining, the choice of C7632 multi-knife semi-automatic chuck lathe, the cutting edge near the spindle flange, (Figure 1) α in order to complete a fixture in the positioning of the total length of the workpiece, Will encounter the problem of how to accurately locate the axial. Due to the process, the inner hole of the workpiece to be machined only after rough expansion work, and the fixture is used as shown in Figure 1 automatic centering spring clamp. First of all, let us analyze the axial error positioning problem. Assuming that the large end face of the cylinder liner to be fitted each time is ideally in a certain cross section perpendicular to the axis of the fixture, the axial positioning after clamping in this case What is the error value? Can be deduced as follows: