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通过工艺设计优化降低4A缸体废品率
Reduce the Scrap Rate of 4A Cylinder by Process Design
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- DOI:
- 作者:
- 郭丹丹 段素红 杨春霞 高存贞 尹冬雪
GUO Dandan;DUAN Suhong;YANG Chunxia;GAO Cunzhen;YIN Dongxue
- 作者单位:
- 第一拖拉机股份有限公司 河南科技大学
First Tractor Company Limited,Luoyang 471004,China;College of Agricultural Equipment Engineering,Henan University of Science and Technology,Luoyang 471004,China
- 关键词:
- 缸体 黏砂 砂孔 工艺设计
cylinder block burn-in sand defect sand inclusions process design
- 摘要:
- 针对4A缸体在生产中出现的砂眼、黏砂、漏水等问题,通过优化工艺设计,采用精益生产理念,将原工艺的上下箱颠倒,对砂芯易黏砂部位剥离出来,选用粒度140/70的覆膜砂,并浸涂专用的防黏砂涂料。结果表明,黏砂问题彻底解决,废品率从24.60%下降至6.28%。
In view of the sand inclusion, burn-in sand defect, block leaking and other defects in the production of 4 A cylinder block, casting process design of 4 A cylinder block was optimized. The upper and bottom molds in the original design were reversed, the sand core easy to cause burn-on was separated and made specially using 140/70 mesh coated sand and dipped by resistant burn-in and burn-on coating. lean production was applied in the production. The results showed that sand burn-in and burn-on defects were completely eliminated, and the casting rejection rate decreased from24.6% to 6.28%.