缸体开裂是我厂的重大质量问题。为了从残余应力角度了解整个缸体的静态内应力分布规律,找出缸体开裂原因,以便提出相应的改进方案,因此,我们从1983年开始进行了三轮测试。第一轮采用锯割与钻孔两种方法,样品是从现生产的废品缸体中随机抽取的;第二轮用钻孔法,样品有现生产和退火两种;第三轮分别对现生产、缓冷、退火 Cracking cylinder is a major quality problem in our factory. In order to understand the distribution rule of static internal stress of the whole cylinder from the perspective of residual stress and to find out the cause of cylinder cracking in order to put forward the corresponding improvement program. Therefore, we started three rounds of testing since 1983. The first round of sawing and drilling two methods, the sample is from the production of scrap cylinder randomly selected; the second round of drilling method, the sample is now produced and annealed two; the third round of the present Production, slow cooling, annealing