我厂以生产光学分度头为主要产品,与之配套的长工作台(见图1)是测量轴类零件必不可少的基准件。按原一机部部标(JB2219-78)的规定,此工作台的工作面 A、 B、 C沿长度方向的直线度要求为 0.01/1000。这对于我们机加工力量薄弱的仪器厂来讲是比较困难的,长期以来都是靠人力刮研加 I plant to produce optical indexing head as the main product, with the supporting long workbench (see Figure 1) is an essential shaft parts measurement standards. According to the standard of the original machine department (JB2219-78), the linearity of the working surface A, B, C along the length direction is 0.01 / 1000. This is very difficult for our instrumentation plant with weak machining capacity. It has long been based on the scraping of manpower