基于对比试验的Q345钢135°矫正法折弯及回弹优化  

Optimization on 135° Orthosis Bending and Springback of Q345 Steel Plate Based on Contrast Test

作　　者：刘佳灏 杜勇[1] 薛克敏[1] 张恒光[1] 田耀江 姚嘉炜 葛自良[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《精密成形工程》2015年第4期31-36,共6页Journal of Netshape Forming Engineering

摘　　要：目的针对自由回弹采用的补偿法寻找最优解过程繁杂,结果不稳定这一问题,寻找更为有效的折弯方式。方法利用Pearson相关系数和灰色系统理论,采用对比实验,以16 mm厚Q345钢为研究对象,选择凸模圆角、摩擦因数及矫正量为变量,回弹角与最大成形力为目标函数,求得工艺参数对回弹角的关联系数。再对优化的参数组合进行有限元模拟验证。结果矫正法回弹控制效果远远优于自由折弯模具的回弹控制效果。结论将优化获得的工艺参数进行有限元模拟验证,指导设计、试模,成形质量得到明显提高,对实际生产具有显著的指导意义。This paper explored more effective bending method targeting at the problem of complex process and unstable results by the compensating method for calculation of the free springback. This paper adopted the comparison test using Pearson related coefficients and the gray system theory. The test took the Q345 steel of 16 mm thickness as the research subject to obtain the correlation coefficient of the processing parameters to the springback angle,taking punch radius,friction coefficient and rectification as the variables and springback angle and maximum forming force as the objective functions. The FEM simulation was used to verify the optimized parameter combination. The springback control effect by the orthosis method was much better than that by the free bending mold. The FEM verification showed the design and the die trial with the optimized processing parameters can improve the forming quality and had significant guidance for practical production.

关 键 词：厚板折弯 对比实验 矫正法 回弹角 

分 类 号：TG386[金属学及工艺—金属压力加工]