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成批或大量生产中,在車床上加工以内孔(2～3級精度)定位的工件外圓和端面时,常常采用弹性可涨式心軸。心軸工作的精确度主要取决于下列因素:一是定位表面与筒夹錐面的同心度以及作用在筒夹上的元件其錐面上的軸綫与心軸上規定的自动定心点的重合程度。二是弹性筒夹本身所能达到的精度(即筒夹的工作性能),不仅取决于筒夹各部份各个尺寸之間的比例关系,还和机械加工时所产生的弹性部份壁厚的不
Batch or mass production, the lathe machining hole (2 to 3 precision) positioning of the workpiece cylindrical and end surfaces, often using flexible up mandrel. The accuracy of mandrel work mainly depends on the following factors: First, the concentricity of the positioning surface and the collet conical surface and the role of components in the collet conical surface axis and the axis of the specified automatic centering point Coincidence degree. Second, the accuracy of the collet itself (that is, collet work performance), not only depends on the collet each part of the size of the relationship between the proportions, but also with the mechanical processing of the elastic part of the wall thickness Do not