液性塑料自动定心夹具是利用薄壁套筒在液性塑料的压力作用下产生均匀的径向变形,使之涨紧工件内孔或夹住工件外圆达到定心和夹紧的目的。由于定位表面和工件的定位基准是圆柱面接触,接触面可以达到薄壁套筒长度的80％,夹紧均匀并不损坏定位基准表面,可保证较高的定心精度,一般被加工表面对定心基准的同心度可保持在0.015毫米以内。 Liquid plastic self-centering jig is the use of thin-walled sleeve under the pressure of liquid plastic to produce uniform radial deformation, so that the tensioning of the workpiece bore or clamping the workpiece outside the center to achieve the purpose of centering and clamping. As the positioning of the positioning surface and the workpiece reference cylindrical surface contact, the contact surface can reach 80% of the length of the thin-walled sleeve, clamping uniform and does not damage the positioning of the reference surface, to ensure high centering accuracy, the general surface to be machined The concentricity of the centering datum can be kept within 0.015 mm.