(1. 清華大學(xué) 機(jī)械工程系，北京 100084；2. 清華大學(xué) 先進(jìn)成形制造教育部重點(diǎn)實(shí)驗(yàn)室，北京 100084;
3. 沈陽(yáng)黎明航空發(fā)動(dòng)機(jī)(集團(tuán))有限責(zé)任公司，沈陽(yáng) 110043)
摘 要: 采用商用軟件ProCAST對(duì)調(diào)節(jié)片熔模鑄造過(guò)程的應(yīng)力進(jìn)行數(shù)值模擬，分析調(diào)節(jié)片凝固過(guò)程中的應(yīng)力變化情況，結(jié)果表明：裂紋缺陷處應(yīng)力較大，凝固較慢。針對(duì)調(diào)節(jié)片裂紋的成因，提出在裂紋處增加內(nèi)澆道的改進(jìn)工藝方案，并對(duì)其在改進(jìn)工藝下的鑄造應(yīng)力進(jìn)行數(shù)值模擬。模擬結(jié)果表明：改進(jìn)方案可明顯減小原方案裂紋處的應(yīng)力，消除該處裂紋缺陷，提高產(chǎn)品合格率。實(shí)際生產(chǎn)表明：改進(jìn)方案明顯消除了原方案的裂紋缺陷，合格率提高了30%。
關(guān)鍵字: 鑄造應(yīng)力；數(shù)值模擬；調(diào)節(jié)片；熔模鑄造
（1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Key Laboratory for Advanced Materials Processing Technology, Ministry of Education,
Tsinghua University, Beijing 100084, China;
3. Shenyang Liming Aero-Engine (Group) Corporation, Shenyang 110043, China）
Abstract:The commercial software ProCAST was used to simulate the stress of adjustment sheets during the solidification, and then the stress change tendency of the adjustment sheets during the solidification was analyzed. The results indicate that the stress is bigger and the solidification is slower in the places where the crack defects may easily happen. The casting stress of an improved scheme for adjustment sheets was also simulated. The simulated results show that the improved scheme can reduce the casting stress and get higher yield. The real production indicates that the improved scheme can eliminate defect and increase the yield by 30%.
Key words: casting stress; numerical simulation; adjustment sheet; investment casting
