国家标准 GB1031—83把轮廓支承长度率t_p 规定为评定轮廓微观不平度的形状参数。在实际工作中,利用一般触针式轮廓仪(泰吕塞夫4、5、6型等除外)和光切显微镜测量得到轮廓曲线图后,用人工测量计算一系列水平截距上的支承率的方法工作量太大。本文介绍通过一般触针式轮廓仪和光切显微镜得到轮廓曲线后,作出幅度分布曲线,从 t_p 曲线上获得 t_p 值的方法。这种方法简便易行。具体做 The national standard GB1031-83 defines the profile support length rate t_p as the shape parameter for evaluating the profile micro-roughness. In practice, using a general stylus profilometer (except for Tyulusev 4, 5, 6, etc.) and a light-cut microscope measurement of the profile curve, a series of horizontal intercept support ratios Method is too heavy workload. This article describes the general contact stylus profilometer and light-cut microscope obtained profile curve, the amplitude distribution curve, t_p curve t_p value obtained from the method. This method is simple and easy. Specific to do