铝杆连铸结晶轮滚压残余应力数值仿真与工艺参数优化  

PROCESS PARAMETER OPTIMIZATION AND NUMERICAL SIMULATION OF SURFACE ROLLING RESIDUAL STRESSES IN CRYSTALLIZING WHEEL USED FOR ALUMINUM ROD

作　　者：王栋[1] 韩变枝[1] 王忠文 

机构地区：[1]太原理工大学阳泉学院,阳泉045000 [2]阳泉铝业股份有限公司,阳泉045002

出　　处：《机械强度》2014年第3期438-444,共7页Journal of Mechanical Strength

摘　　要：表面滚压技术可有效提高金属零件的疲劳强度,借助于有限元数值仿真可以分析、优化滚压工艺基本参数。以电工铝杆连铸结晶轮为研究对象,设计了滚压方案,建立了连续多圈滚压的数值仿真模型,获得了合理的滚压变形与残余应力结果,并分析了滚压参数对残余应力分布规律的影响。仿真结果显示,滚压进给量太大、转速太快都容易造成表层残余应力分布的不均匀甚至产生残余拉应力;合理的滚压圈数在于稳定和保持已经获得的残余压应力,获得较高的表面质量。仿真参数为结晶轮的滚压工艺制订/优化提供重要的指导/参考价值,数值仿真的优化参数经过生产实践验证,达到了显著提高抗疲劳强度和使用寿命的效果。It is very effective on the improvement of fatigue strength of components by surface rolling. With the aid of FE simulation and analysis, the basic process parameters of the surface rolling can be analyzed and optimized. In this paper, the rolling plan was firstly designed for the aluminum rod crystallizing wheel. Then the numerical simulation 3D model was established for ring rolling, the rolling deformation results and residual stresses obtained were reasonable. The influences of rolling parameters on the distribution rules of residual stress were discussed. The results indicate that, too big feeding or too fast rolling speed may easily cause the surface residual stress distribution uneven, or even result in tensile residual stress; the number of rolling rings plays an effective role to keep the reasonable obtained residual compressive stress stable, and to obtain high surface quality. The simulation parameters provided for rolling process of the crystallizing wheel. It has important guiding and reference value. The simulation process was verified by the production practice, it was to achieve expected results to improve the fatigue strength and service life.

关 键 词：结晶轮 滚压 残余应力 数值仿真 参数优化 

分 类 号：TG233.6[金属学及工艺—铸造]