一、概述车轮挡圈是车轮总成的一个重要零件,其断面几何形状比较复杂(图1),主要几种挡圈各部尺寸列于表1。挡圈在汽车行驶时受小负荷冲击和剪力作用,因此这种零件要求具有足够的机械性能。它的技术条件要求:不平度为1.5毫米,椭圆度不超过1.5毫米。国内外多采用B_3型成型钢材制作,其抗拉强度为40公斤/毫米~2,延伸率为25%。 I. Overview Wheel retaining ring is an important part of the wheel assembly, the geometry of the cross section is more complex (Figure 1), the main dimensions of the various types of retaining ring are listed in Table 1. The retaining ring is subjected to small loads and shearing forces while the car is running, so that such parts are required to have sufficient mechanical properties. Its technical requirements: Unevenness of 1.5 mm, ovality of not more than 1.5 mm. At home and abroad to use more B_3-shaped steel production, the tensile strength of 40 kg / mm ~ 2, elongation of 25%.