论文部分内容阅读
研制了一台用于测量平均粗糙度值在4～10微英寸范围内的半壳体整个内表面粗糙度的激光表面光洁度量具。制造了可与国家标准局度规测量进行迹线比对的标准。这种量具采用激光束角度散射原理,它的设计消除了由于零件反射程度不同和激光强度的改变而造成的误差。使用微处理机,根据所确定的标准提取数据,并处理来自测试零件的散射信息,从而在输出纸带上获得零件表面粗糙度的连续迹线。该量具已安装在产品检验实验室,对它所做的统计性估价表明,粗糙度平均值的重复性为±0.5微英寸。研制该量具所依据的原理和理论亦适用于其他零件结构和不同粗糙度范围。
A laser surface finish gauge was developed for measuring the entire inner surface roughness of a half-shell with an average roughness value in the range of 4 to 10 microinches. Made with the National Bureau of Standards gauge trace alignment standards. This gauge uses the principle of laser beam angle scattering, which is designed to eliminate the error due to the different parts of the degree of reflection and laser intensity changes caused. Using a microprocessor, data is extracted based on the determined criteria and scattering information from the test part is processed to obtain a continuous trace of the part surface roughness on the output tape. The gage has been installed in the product inspection laboratory and a statistical evaluation of it has shown that the average roughness is ± 0.5 microinches of repeatability. The principle and theory on which the gage was developed are also applicable to other part structures and different roughness ranges.