本刊1983年第4期刊登的“机械制图尺寸的合理标注”一文中第四大点第(1)小点提出的:“轴类零件一般标注径向圆跳动比较合理,切不可标注不同轴度要求。”并以图8(a)、(b)对比加以说明。对此笔者有不同的看法。本文先对原文所标注的形状和位置公差提出不同的意见,然后对上述论点加以分析。 (1)新的国家标准《形状和位置公差》已于1981年7月1日起实施,但原文仍采用老的形位公差标准。新标准中取消了“表面”两字,也取消了“不”字等。如旧标准中的不同轴度在新标准中称为同轴度。旧标准有径向跳动和端面跳动,而新标准中称为圆跳动,并分为径向圆跳动、端面圆跳动、斜向圆跳动三种。但原 The magazine published in the fourth issue of 1983, “reasonable drawing of the mechanical drawing size,” the fourth largest point of the first (1) point: “shaft parts generally marked radial circle beating more reasonable and must not be marked different Axis requirements. ”And to Figure 8 (a), (b) contrast to illustrate. This author has a different view. This article first put forward different opinions on the original shape and location tolerances, and then analyzes the above arguments. (1) The new national standard, “Shape and Position Tolerance”, came into effect on July 1, 1981, but the old version still adopts the old standard form tolerance. The new standard canceled the “surface” of the word, also canceled the “no” word. Such as the old standard in the different axis of the new standard called coaxial. The old standard of radial runout and face beating, and the new standard called round beating, and is divided into radial round beating, end round beating, bevel beating three. But the original