凸轮在一般机械的自动控制机构中被广泛采用。为了使制造出的机构能在准确的时间内动作,保证工作的顺利进行,就必须加工出高精度的凸轮外形。假如使用光学曲线磨床或靠钳工修磨来制造高精度的凸轮,不但生产周期长而且很不经济,在实际生产中是行不通的。大批量生产凸轮是使用靠模在凸轮磨床上进行的。其工作原理是:靠模和凸轮工件共同固定在凸轮磨床车头的轴O上见图1。轴O可绕轴O_3摆动(距离b保持不变)。磨床工作时,和凸轮一起转动的靠模与靠模滚轮(在固定轴O_2上)相切,靠模的形状控制 Cam in the general mechanical automatic control mechanism is widely used. In order to make the mechanism can be produced in an accurate time action, to ensure the smooth progress of work, we must create a high-precision cam profile. If the use of optical curve grinder or fitters to repair to create high-precision cam, not only long production cycle and very uneconomical, in actual production will not work. High-volume production of the cam is carried out using a cam on the grinding machine. Its working principle is: by the mold and cam parts together fixed in the cam gear head O axis see Figure 1. The axis O can swing around the axis O_3 (the distance b remains unchanged). Grinder work, the cam and the rotation of the master by the mode roller (in the fixed axis O_2 tangent), by the shape of the mold control