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众所周知,转塔自动车床横向进给刀架上配置有一套盘形凸轮(平板凸轮)。盘形凸轮(见附图)上具有轴孔和销孔。凸轮的位置是用零圆弧位置确定的,零圆弧半径 R等于横刀架杠杆的臂长。盘形凸轮通常采用圆盘形坯料制造,这样不但金属材料的利用率不高,而且制造凸轮的劳动量很大。如将盘形凸轮采用长方形坯料加工,上述情况可大大改善(见附图中虚线位置),它既能使金属材料节省近号,又能使制造凸轮的劳动量减少一半。
As we all know, turret automatic lathe horizontal feed turret is equipped with a set of disc cam (flat cam). The disk cam (see attached drawing) has a shaft hole and a pin hole. The position of the cam is determined by the zero arc position. The radius of the zero arc R is equal to the arm length of the crossbar lever. Disc cams are usually made of disc-shaped blanks, so that not only the utilization of metallic materials is not high, and the amount of labor for manufacturing cams is large. This can be greatly improved by using rectangular blanks for disc cams (see the dotted line in the figure), which can save metal materials in close proximity and reduce the amount of labor required to produce cams.