第三部分荫罩成型模主要零件的加工与测量荫罩成型模的主要零件凸模、顶板、凹模和压垫是荫罩成型的关键件。由于这些零件上的曲线和曲面复杂,精度要求高,因而增大了加工的难度。在各主要零件加工工序中,为保证质量,关键 The third part of the shadow mask forming the main parts of the processing and measurement Shadow mask forming the main parts of the punch, roof, die and pressure pad is the shadow mask forming the key pieces. Due to the complexity of the curves and surfaces on these parts, high accuracy is required, thus increasing the machining difficulty. In the main parts of the processing operations, in order to ensure quality, the key