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我厂6.5吨载重汽车的前轴是由谷城汽车配件厂试制的,该厂采用(?)800毫米的辊锻机成形,经切边和压弯而成。经冷加工后,上台架试验5根,发现疲劳寿命最差的只有24万次,疲劳寿命较短的前轴的断裂部位均在头部约110毫米处,属于不正常的早期破坏,达不到产品设计的要求,故不能装车使用。为了改进辊锻前轴的质量,我们做了以下工作。一、早期断裂的原因概述经过对辊锻成形工艺过程的检查分析,初步认为早期断裂的原因如下。
The front axle of our 6.5 ton truck is trial-produced by Gucheng Auto Parts Factory. The mill is formed by (?) 800 mm roll forging machine and is formed by trimming and bending. After cold working, the test on the bench 5, found that the worst fatigue life of only 240,000, the fatigue life of the short axis of the front part of the fracture are about 110 mm in the head, is an abnormal early damage, up to To product design requirements, it can not be loaded to use. In order to improve the quality of roll forging front axle, we did the following work. First, an overview of the causes of early rupture After the analysis of the roll forging process, preliminarily believe that the causes of early rupture are as follows.