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前汽缸是电站设备中重要的大型合金铸钢件,我厂71年初接受任务开始生产,由于该铸钢件重量大、结构比较复杂,过去生产经验少,所以在生产过程中,铸件产生夹砂缺陷比较严重。由于铸件夹砂,同时给清理,焊补带来了较大的工作量。不但延长了生产周期,并且由于焊补质量不易检查,有时加工后发现缺陷。前汽缸因夹砂造成的废品有时占废品总数的7o%,严重的影响了保质,保量和配套生产任务的完成。
Before the cylinder is an important large-scale alloy steel castings in power plant equipment, I started the factory in early 71 to accept the task of production, due to the heavy steel castings, the structure is more complex, less production experience in the past, so in the production process, casting sand Defects more serious. Due to casting sand, while to clean up, welding repair brought a greater workload. Not only to extend the production cycle, and due to the welding quality is not easy to check, and sometimes found defects after processing. Former cylinder due to sand caused by waste products sometimes accounted for 7o% of the total waste, a serious impact on the durability, the amount of security and the completion of the production tasks.