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零件的过盈配合在机械制造中有着广泛的应用,它不仅可以传递扭矩,用来代替键连接,而且可以传递轴力,此外还具有结构简单,制造方便的优点。但是怎样才能使得过盈配合的双方都能在适当的应力范围之内工作,使之既不松动,又不产生塑性变形,这里存在一个对过盈量的选择问题。要正确地选择过盈量,首先要了解过盈配合所产生的应力。按照传统算法,把过盈配合的两体认为在Z向(轴向)形状都是不变的,即认为是两个厚壁园筒的组合体,按平面轴对称理论进行计算。显然,这样的计算与实际情况是有较大出入的。因为,一般说来配合的两体在轴向形状都是有很大变化的(特别是包容零件),也就是说,过盈配合的应力计算实际上不是平面轴对称,而是空间轴对称
The interference fit of parts is widely used in machinery manufacturing. It not only can transmit torque, but also can transmit axial force instead of key connection. In addition, it has the advantages of simple structure and convenient manufacture. But how can both make the interference fit work within the proper stress range so that it is neither loose nor plastically deformed, there is a question of the choice of interference. To correctly select the interference, we must first understand the stress generated by interference fit. According to the traditional algorithm, the two bodies with interference fit are considered to be invariable in the Z-direction (axial) shape, that is, the combination of two thick-walled cylinders is calculated according to the theory of plane axis symmetry. Obviously, this calculation is quite different from the actual situation. Because, in general, with the two bodies are greatly changed in the axial shape (especially inclusive parts), that is, the interference stress calculation is not actually a plane axisymmetric symmetry, but the spatial axisymmetric