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裂纹是建筑机械零件的常见缺陷,裂断是机械事故中的常见事故。据文献介绍,国外对1200例塔吊事故进行分析,断裂事故竟占事故总数的55%。在解放牌汽车使用中缸体出现裂纹的机率高达40%。但不少单位对建筑机械零件裂纹的研究工作尚未深入开展。笔者现根据国内外资料和工作实践,就裂纹问题,略陈管见,以期得到同行们的指教。一、裂纹的规律 1.裂纹存在的普遍性由于金属冶炼、制造、使用、维修等方面的种种原因,建筑机械的每个零件都有裂
Cracking is a common defect in construction machinery parts. Cracking is a common accident in mechanical accidents. According to the literature, 1200 cases of tower crane accidents were analyzed abroad, and the fracture accident accounted for 55% of the total number of accidents. The probability of cracks in the cylinder block in the use of Liberation cars is as high as 40%. However, many units have not carried out in-depth studies on cracks in construction machinery parts. The author is now based on domestic and foreign data and work practices, on the issue of cracks, I have a good understanding, in order to get advice from their peers. First, the law of cracks 1. The universality of cracks due to various reasons of metal smelting, manufacturing, use, maintenance, etc., each part of the construction machinery has a crack