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我国颁布了公差与配合新标准,规定从1980年7月1日起实施。但贵刊1981年11期《厌氧胶在机械工业上的应用》一文中,有关公差与配合方面,仍用了旧术语旧概念。因此有两个毛病,请加注意。1.文中用“静配合和动配合”两个旧术语,在新国标中已改用“过盈配合和间隙配合”。2.文中本来要求静配合的零件,可改为动配合来加工,……这样的改动,放宽了加工公差,降低了成本”。由于配合性质的改变而放宽了加工公差,这是不对的。因为新国标中,基本偏差决定公差带的位置,标准公差才决定公差带的大小,所以由过盈配合改为间隙配合,在公差等级不变的情况下,只改变了公差带的位置,也即改变了基本偏差的代号,并不能改变标准公差。这段话可改为“本来要求过盈配合的零件,
China promulgated a new standard tolerance and cooperation, the provisions from July 1, 1980 come into operation. But you published in 1981, 11 “anaerobic adhesive in the mechanical industry,” a article, the tolerance and cooperation, still using the old term old concepts. So there are two problems, please pay attention. 1. The text of the “static and dynamic fit with the” two old terms, the new national standard has been used in the “interference fit and clearance fit.” 2. The text originally required static fit parts, can be changed to the dynamic fit to processing, ... ... Such changes, to relax the processing tolerance and reduce the cost. “Due to the nature of the change with the relaxation of processing tolerances, this is wrong. Because the new national standard, the basic deviation determines the location of the tolerance zone, the standard tolerance determines the size of the tolerance zone, so the interference fit into the gap with the tolerance level unchanged, only changed the location of the tolerance zone, also That change the code of the basic deviation, and can not change the standard tolerance.This paragraph may be changed to ”interference parts that would otherwise require,