薄壁筒零件在四爪卡盘中夹紧是个困难的问题,不仅会使零件产生较大的变形,而且也无法紧固。若为此制造专用的心轴,则在零件的加工数量较少时又不太经济。如图所示的方法,是先将卡爪调节到与薄壁圆筒的外径相适应的位置,然后用四个小型的“C型夹头” Clamping thin-walled cylinder parts in a four-jaw chuck is a difficult issue that can not only result in significant deformation of the part, but also can not be tightened. If a dedicated mandrel is made for this purpose, it is less economical when the number of parts to be machined is small. As shown in the figure, the jaws are first adjusted to fit the outer diameter of the thin-walled cylinder, and then four small “C”