1 前言 在生产中,经常可见到精密衬套的图纸内径尺寸只标有压入后的直径,而无压入前的直径。由于衬套压入轴承座时,会产生弹性变形,直径将会缩小,壁厚会有所增加,要正确计算出轴套压入前的内径,就必须掌握衬套的变形规律,找出直径变化与过盈量之间的关系。下面,笔者用弹性力学理论对薄壁衬套在过盈装配时的变形作一分析,推导出其在受压状态下的弹性压缩量计算公式,同时讨论加载检测时检测力对薄壁衬套直径和壁厚的影响。 1 Preface In the production, it is often seen that the inner diameter of the drawings of the precision bushing is only marked with the diameter after press-in but without the diameter before press-in. As the bushing is pressed into the bearing seat, it will produce elastic deformation, the diameter will be reduced and the wall thickness will be increased. To calculate the inner diameter of the bushing before pressing in, the deformation law of the bushing must be grasped to find the diameter The relationship between change and the amount of interference. Next, the author uses the theory of elasticity to analyze the deformation of thin-walled bushing during interference fit, and deduces the formula for calculating the amount of elastic compression under the condition of compression. Meanwhile, the influence of the detection force on the thin-walled bushing Effect of diameter and wall thickness.