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一、贯彻粗糙度新标准新的表面粗糙度国家标准(GB1031-83等)是在原国标表面光洁度的基础上,参照 ISO 标准重新制定的,是一项很重要的基础标准。国家标准局要求于1985年1月1日起实施。表面粗糙度新标准采用中线制评定表面粗糙度。主要可采用:(1)轮廓算术平均偏差(Ra);(2)微观不平度十点高度(Rz);(3)轮廓最大高度(Ry)。在三个项目中任选一个,在新标准中优先选用 Ra。建国三十多年来,在机械图上,一直采用表面光洁度级别代号▽1～▽14的标注方式。广大工程技术人员和生产工人经过多年生产实践,以及借助于光洁度样板进行对照,对表面光洁度级别代号的使用较为习惯和熟练。在应用表面粗糙度时,虽然经过学习,但
First, the implementation of new standards for roughness The new surface roughness of the national standards (GB1031-83, etc.) is based on the original GB surface finish, re-formulated with reference to the ISO standard is an important basic standard. National Bureau of Standards requirements January 1, 1985 come into operation. The new standard for surface roughness uses centerline to assess surface roughness. The main can be used: (1) contour arithmetic mean deviation (Ra); (2) microscopic irregularity ten point height (Rz); (3) contour maximum height (Ry). Choose one of the three projects and give priority to the new standard. More than 30 years since the founding of the People’s Republic of China, on the mechanical drawing, the method of marking with surface finish code ▽ 1 ~ ▽ 14 has been adopted. The majority of engineering and technical personnel and production workers after years of production practice, and with the help of a model comparison of the finish, the use of surface finish grade code is more used and proficient. While studying the surface roughness, though