对新国标“产品文件中表面结构的表示法”的解读

Decipherment of the New National Standard-the Representation of Surface Texture in Product Documentation

在机械图样上,为保证零件装配后的使用要求,除了对零件各部分结构的尺寸、形状和位置给出公差要求,还要根据功能需要对零件的表面质量—表面结构给出要求。新国标GB/T131-2006《产品几何技术规范(GPS)技术产品文件中表面结构的表示法》中规定,表面结构是表面粗糙度、表面波纹度、表面缺陷、表面纹理和表面几何形状的总称;并对轮廓参数,特别是粗糙度轮廓(R轮廓)在图样中的表达和标注作了新的规定。新国标与将代替的旧国标GB/T131-1993在读解和标注上有相当的不同。

In mechanical drawing, besides raising a claim to the tolerance in size, shape and position for each spare part, the claim to the surface quality of spares-the surface texture is also necessary in order to guarantee the operating requirements after component assembly. According to the new national standard GB/Tl31-2006〈the documentation of the surface texture in the Graphic production standard（GPS）〉, the surface texture is the floorboard of surface roughness, surface waviness, surface blemish, surface grain and surface geometry; Also it gives a claim to the new standards of the expression and label of the shape parameter, especially the surface coarseness profiling （R profiling） in drawing. This new standard has great differences in representation and label comparing to the old standard GB/TI31-1993 that will be replaced.