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我厂产品中的隔圈零件(见图1),因其精度高,加工难度大,过去一直依靠进口。为此,经生产试制实现该零件的国产化。用常规的工艺方法很难达到零件的精度。其平行度、平面度、厚度尺寸等必须一次加工合格,而且要求内应力和装夹变形小。为此,在工艺上采取如下措施: 1.粗加工、半精加工后都要时效,消除加工应力。 2.半精加工、精加工工序可在高精度车床上进行,并采用锥度可调弹簧夹头(见图2)夹紧工件,使其变形小,重复定位精度高。若用三爪卡盘夹紧,需将零件加工成图3所示的形式再加工。
I plant products in the spacer parts (see Figure 1), because of its high precision, difficult processing, the past has been relying on imports. To this end, the trial production to achieve the localization of the parts. With conventional technology is difficult to achieve the accuracy of the parts. Its parallelism, flatness, thickness and other dimensions must be qualified once processing, but also requires less internal stress and clamping deformation. To this end, in the process to take the following measures: 1. Rough, semi-finished after aging, to eliminate the processing stress. 2. Semi-finishing, finishing process can be carried out on a high-precision lathe, and taper adjustable collet chuck (see Figure 2) to clamp the workpiece, the deformation is small, repeat positioning accuracy. If you use three-jaw chuck clamping, the parts must be machined into the form shown in Figure 3 and then processing.