消失模铸造球墨铸铁减速机壳体皱皮及缩孔缺陷研究

Study on Wrinkling and Shrinkage Defects of Ductile Iron Reducer Housing in Lost Mold Casting

消失模铸造生产的球墨铸铁减速机壳体,在生产过程表面出现了皱皮和缩孔缺陷。通过优化浇注系统,由顶注式改为底注式,有效减少了浇注过程铁液的紊流,解决了减速机壳体表面皱皮;探索出散热新工艺,解决了铸件热节区域的缩孔缺陷。试验结果表明,浇注系统改为底注后彻底解决了铸件表面皱皮缺陷;散热新工艺解决了缩孔缺陷,并且工艺简单,工艺出品率高。

The nodular cast iron reducer shell produced by lost die casting has wrinkled skin and shrinkage hole defects on the surface of the production process.By optimizing the pouring system from top pouring to bottom pouring,the turbulent flow of iron liquid in the pouring process is effectively reduced,and the surface wrinkling of reducer shell is solved.The new heat dissipation technology is explored to solve the shrinkage hole defect in the hot zone of the casting.The test results show that the surface wrinkling defect of castings can be completely solved after the casting system is changed to bottom pouring.The new heat dissipation process solves the shrinkage hole defect,the process is simple and with a high production rate.