一维温差中心压实法锻造过程的有限元分析  

Finite Element Analysis for JTS Forging with One-dimensional Temperature Gradient

作　　者：廖培根[1] 方刚[1] 雷丽萍[1] 曾攀[1] 杜凤山[2] 

机构地区：[1]清华大学机械工程系,北京100084 [2]燕山大学机械工程学院,河北秦皇岛066004

出　　处：《热加工工艺》2007年第17期73-75,78,共4页Hot Working Technology

基　　金：国家自然科学基金重点项目(50435010)

摘　　要：在大锻件的锻造过程中,为了锻合缺陷,提高锻件内部质量,采用中心压实法可以起到较好的效果,但是由于传统中心压实法锻造的操作复杂,工况较差,而且锻件表面容易产生压伤和折叠等问题,所以提出一种新的中心压实法——一维温差中心压实法,即只对锻件上下表面强制冷却,建立一维的不均匀温度场,采用平砧进行锻造,从而避免上述问题。介绍的工作即采用有限元的方法模拟一维温差中心压实法和传统中心压实法锻造过程,分析这两种情况下锻件的温度场和应力应变场,比较它们对锻件质量的影响。分析结果表明:针对大锻件,一维温差中心压实法的锻造效果要优于传统中心压实法。Japan-Tefeno-Shikano method （JTS）is considered as an effective method of improving the qualities of heavy forgings. But the traditional JTS processing is complex, and it causes material damage of forging surface. So a new method is proposed, which requires only one-dimensional temperature gradient and the flat anvils to avoid the disadvantages mentioned above. The filed of the temperature, strain and stress calculated by rigid-plastic finite element method based on both traditional JTS method and the JTS method with one-dimensional temperature gradient were analyzed, so that the effect of two methods on the forgings quality could be evaluated. The results show that the JTS method with one-dimensional temperature gradient is better than the traditional JTS method for heavy forgings.

关 键 词：一维温差中心压实法 有限元 温度场 

分 类 号：TG316[金属学及工艺—金属压力加工]