摘要
研究双层铝合金端盖的成形工艺,从铸件多薄筋、针孔度要求高、易缩松等质量难点出发,介绍铸件低压铸造浇注系统设计思路、层流压力曲线的设计方法及惰性气体除气法针孔缺陷的控制原理和方法,并通过铸造模拟软件仿真分析工艺的合理性.基于装配过盈量大,介绍温差法装配参数的设计方法,按照预设参数生产试制,并通过渗透探伤、射线探伤、针孔度检测、本体解剖等充分验证,满足产品技术要求.
Abstract
The forming process of double layer bearing shield was researched.Starting from the quality difficulties such as multiple thin ribs,high requirements for pinhole degree,and easy shrinkage in castings,this paper introduces the design concept of low-pressure casting gating system,the design method of laminar pressure curve,and the control principle and method of needle pinhole defects using inert gas degassing method.The rationality of the prediction process is analyzed through casting simulation software simulation.Based on the large assembly interference,this paper introduces the design method of temperature difference method assembly parameters.Production trial production is carried out according to preset parameters,and it is fully verified through penetration testing,radiographic testing,pinhole degree testing,body dissection,etc.,to meet the technical requirements of the product.
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