大连机床厂生产的C620—3车床的溜板箱有两个操纵凸轮(见图1)。它们的作用是控制大刀架和溜板箱的进给。凸轮在使用正确、尺寸合格的凸轮,满足了修理上的需要,现将具体做法介绍如下。一、理论分析 我们首先对凸轮的曲线构成进行了分析(见图2)。凸轮工作部分的外廓线是由一个直径为中18Dd的圆沿着特定的中心轨迹作纯滚动的连线组成,而这特定的中心轨迹的 The C620-3 lathe produced by Dalian Machine Tool Plant has two steering cams (see Figure 1). Their role is to control the turret and the feeding of the carriage. Cam in the use of the correct size of the cam, to meet the needs of the repair, the specific practices are introduced below. First, the theoretical analysis First of all, we analyzed the curve of the cam (see Figure 2). The outer profile of the working part of the cam consists of a line of purely rolling circles with a diameter of 18Dd along a particular center track,