我公司是全国生产变压器用压力释放阀的大厂家,在生产中有如图1所示的工件。在加工其外圆φ38mm、内孔φ19.2mm及M33×1.5等各尺寸时,由于用四爪单动卡盘装夹,每次换卡盘都给工件找正带来麻烦,费时费力,常因加工偏心导致与M33× Our company is the country’s production of large pressure relief valve manufacturers, in the production shown in Figure 1, the workpiece. In the processing of its outer diameter φ38mm, bore φ19.2mm and M33 × 1.5 and other dimensions, due to the use of four-claw single action chuck clamping, each chuck for the work to find the correct alignment, time-consuming and laborious, often As a result of processing eccentricity and M33 ×