众所周知,零件的几何形状误差与表面光洁度都是评定被加工零件加工质量的重要技术指标。到目前为止,这两项指标都是分别进行测量的。但由于它们都位于同一加工表面上,所以在测量时是互有影响的,即测光洁度时要受几何形状误差的影响,反之亦然。测5～12级光洁度的常用仪器是触针式测量仪-轮廓仪。由于该仪器所用传感器的测量范围很小(约为0.1mm),故无法同时测出被测表面的几何形状误差和表面光洁度。此外,在测弧形零件的表面光洁度时,必须选用各种附件建立弧形基准,故大大降低了检测效率。新型仪器恰在上述问题上作了有益的改 As we all know, parts geometry error and surface finish are important technical indicators to assess the quality of processed parts. So far, both measures have been measured separately. However, since they are all on the same working surface, they have an influence on the measurement, that is, the accuracy of the measurement is affected by geometric errors and vice versa. Commonly used to measure 5 to 12 finish instrument is stylus measuring instrument - profiler. Due to the small measuring range of the sensor used in this instrument (approx. 0.1 mm), it is not possible to measure simultaneously the geometrical errors and the surface finishes of the surface under test. In addition, when measuring the surface finish of arc parts, various attachments must be selected to establish the arc reference, which greatly reduces the detection efficiency. The new instrument just made a useful change on the above issues