大型低压转子锻件多道次拔长工艺控制  

Technical control of multi-pass stretching of low-pressure rotor forging

作　　者：刘鑫[1] 钟约先[1] 马庆贤[1] 袁朝龙[1] 

机构地区：[1]清华大学机械工程系、先进成形制造教育部重点实验室,北京100084

出　　处：《塑性工程学报》2010年第4期1-7,共7页Journal of Plasticity Engineering

基　　金：“十一五”国家科技支撑计划资助项目(2007BAF02B07,2007BAF02B01);国家自然科学基金资助项目(50705048);教育部博士点基金资助项目(20070003080)

摘　　要：随着大型核电低压转子锻件尺寸和重量的增加,锻造工艺需要解决的核心问题之一,就是主拔长工艺中锻件变形能够均匀,而且可防止漏砧,防止局部存在未变形区。文章提出多道次拔长工艺控制方法,通过合理翻转及布砧工艺提高锻件的整体变形效果,并通过数值模拟和物理模拟相结合的方法,对不同工艺的应变分布进行研究。研究结果表明,锻造时,合理的翻转及布砧工艺可以得到较好的内部变形分布。考虑到方便操作,认为对90°翻转工艺采用错砧0.8布砧工艺,对180°翻转工艺采用错砧0.7布砧工艺。With the increase of size and weight of nuclear turbine low-pressure rotor,one of the key issues of forging process is to improve the deformation uniformity of heavy forgings and reduce the non-deformed areas in stretching process.A new technical control method of multi-pass stretching was put out to gain better strain distribution with adopting rational rotation process and staggering anvil process.The strain distribution of different processes was investigated with the combination of modeling and numerical simulation.The results indicate that rational rotation process and staggering anvil process would bring satisfying inner strain distribution.The optimum combination is 0.8 staggering anvil process with 90° rotation process and 0.7 staggering anvil process with 180°rotation process.

关 键 词：大型锻件 数值模拟 锻造工艺 错砧 

分 类 号：TG316[金属学及工艺—金属压力加工]