薄壁衬套的机械加工甚为困难,因衬套的径向刚度差,特别是对径向力较大的加工,如滚压波纹、钻径向孔等尤为显著。采用夹紧衬套的机床心轴应保证夹紧元件与被夹紧工件的定位表面的接触面积尽可能大,以使从被夹紧元件方面来的作用在工件上的力要最小,同时系统的径向刚度要高。 Thin wall bushing machining is very difficult because of poor radial bushing stiffness, especially for the larger radial force processing, such as rolling ripples, drilling radial hole is particularly significant. Machine tool mandrels with clamping bushings should ensure that the contact area of ​​the clamping element with the positioning surface of the clamped workpiece is as large as possible so that the force acting on the workpiece from the clamped element is minimized while the system The radial stiffness is higher.