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美国Sheffield公司制成用穿孔带程序控制的万能自动检验机,可用于同时测量复杂零件的内、外尺寸与壁厚(壁厚(?)由内外尺寸相减而得),例如检验导弹头时,精密测量1000个尺寸仅需两小时(在一般仪器上要两个月时间)。更换被测零件时,调整方便,也适用于小批生产。它的测量范围为:零件的值径与高度最大为500毫来;最小孔径为50毫米。整个系统由床身、测量内外尺寸用的垂直与水平方向的拖板、高精度旋转工作台等构成。零件的既定尺寸由穿孔带形式通过“Bendix”程控系统及液压传动机构来控制拖板运
Sheffield made by the United States perforated tape program-controlled universal automatic testing machine can be used to simultaneously measure the complex parts of the internal and external dimensions and wall thickness (wall thickness (?) Subtracted from the inside and outside the size derived), such as testing the missile head , Measuring 1,000 dimensions in just two hours (two months on a typical instrument). Replacement of the measured parts, easy to adjust, but also for small batch production. Its measuring range is: the value of the part diameter and height of the maximum 500 milliseconds; minimum aperture of 50 mm. The whole system consists of a bed, a vertical and horizontal carriage for measuring internal and external dimensions, a high-precision rotary table, and the like. The dimensions of the part are controlled by the “Bendix” program control system and the hydraulic transmission by the perforated belt