测量块为我车间量具产品中的关键零件,由于零件上需要加工φ3~(+0.013)、φ4~(+0.018)及φ5~(+0.013)的精密小孔,并使其孔中心距离为20~(±0.02),光洁度▽7以上,所以,加工较为困难。为了保证精度,过去,我们一直是在座标镗床上加工。在工件孔径小、精度高、批量大、材料硬和测量工具缺少的情况下,历来总是采用钻、扩、 The measurement block is the key part of the measuring tool in our workshop. Because the parts need to process the precise holes of φ3 ~ (+0.013), φ4 ~ (+0.018) and φ5 ~ (+0.013) and make the hole center distance be 20 ~ (± 0.02), finish ▽ 7 or more, so the processing is more difficult. In the past, we have been machining on a standard boring machine for accuracy. In the small workpiece aperture, high precision, bulk, hard materials and measuring tools lack of circumstances, has always been the use of drilling, expansion,