如图所示的通用车偏心夹具通过其夹具体4安装在车床主轴上,用于加工偏心表面。夹具体的右端装入套筒3内,相对于机床主轴轴线的偏心距为5mm。卡盘1的轴线相对于套筒的回转轴心也偏移5mm。当相对于夹具体回转带有卡盘的套筒时,卡盘轴线相对于主轴轴线的偏移量可达10mm。因而,即使卡盘与套筒的回转角度很大,偏心量却改变不大,这能避免产 The universal eccentric as shown in the figure is mounted on the lathe spindle via its clamp body 4 for the machining of eccentric surfaces. The right end of the clamp is inserted into the sleeve 3 with an eccentricity of 5 mm relative to the axis of the spindle of the machine tool. The axis of the chuck 1 is also offset by 5 mm with respect to the axis of rotation of the sleeve. When the sleeve with the chuck is rotated relative to the clamp body, the chuck axis can be offset by 10 mm from the spindle axis. Thus, even if the rotation angle of the chuck and the sleeve is large, the amount of eccentricity does not change much, which can avoid producing