过去我厂在加工发电机后端盖(铝质、壁厚3mm)止口时,采用图1所示的夹头。整个端盖放进夹具里,由于夹紧变形,工件圆度达不到要求。为此,我们改为在夹头内锥面车出定位台,将端盖的一半露在外面(图2),使端盖止口端的夹紧变形减轻,圆度得到控制。 In the past I plant processing generator back cover (aluminum, wall thickness 3mm) only the mouth, the chuck shown in Figure 1. The entire end cap into the fixture, due to the deformation of the workpiece, circularity less than the requirements. To this end, we instead in the collet conical car out of the positioning platform, half of the end cap exposed (Figure 2), so that the end of the end cap clamping deformation mitigation, roundness is controlled.