位移度是概念比较新的一项位置误差,应用也比较灵活、广泛。特别是多孔板类零件的位移度,适宜采用相关公差,比用尺寸公差标注更有利于加工、装配,有利于保证产品质量,有利于统一要求。但是,目前应用尚不普遍,公差值系列也暂未能编制。如何正确评定位移度误差是推广应用位移度的关键问题,特别是对孔组量规及单件多孔板件位移度的评定更是急待解决的问题。一、孔组理论中心的平移图1,孔组以侧面为定位基准,边心距以尺寸公差形式标注,位移度公差和被测孔直径 Displacement is a new concept of a position error, the application is also more flexible and extensive. In particular, the displacement of porous plate parts, appropriate use of relevant tolerances, dimension tolerances more than the label is more conducive to processing, assembly, help to ensure product quality, in favor of uniform requirements. However, the current application is not yet universal, the tolerance value series has not yet prepared. How to correctly evaluate the displacement error is a key issue to promote the application of displacement, especially for the measurement of the hole gauge and the displacement of the single-piece multi-hole plate is an urgent problem to be solved. First, the hole group theory center of the translation Figure 1, the hole group to the side of the positioning datum, edge distance from the dimensional tolerances in the form of tolerance, tolerance and displacement of the measured hole diameter