表面粗糙度的标注

Methods of indication of surface roughness

本文对GB/T 1 31 -934.1 4.2的机械图样中表面粗糙度符号标注部分进行详细研究 ,发现在标注表面粗糙度符号时不能正确理解和使用标注方法 ,提出在GB/T 1 31 -934.1中增加表面粗糙度符号可以标注在尺寸线或其延长线上的内容及相应的图例 ,这样就能正确地使用GB/T 1 31 -934.1标准。

In this paper,it is studied carefully to the surface roughness symbols in the mechanical drawings and methods of indication GB/T 131-93 4.1 4.2,and it is found that the method of indication can t be understood and used correctly when the surface roughness symbols is indicated. The idea is given that the content and the legend is added about the surface roughness symbols can indicate on the dimension line and it s leader line while misunderstand is not caused in the GB/T 131-93 4.1, so that can correctly us...