摘要
针对汽车覆盖件实际尺寸偏差与回弹仿真差异较大的难题,以某车型翼子板为研究对象,在分析该零件成形工艺的基础上,提出一种新型全工序回弹模拟方法。通过最小有效压料面设计、压料板圆角避空等手段消除压料板闭合带来的塑性变形,使各工序回弹仿真更加准确。在全工序补偿中引入继承补偿概念,将回弹量较小的修边、冲孔工序型面补偿量复合至回弹量较大的拉延、整形工序,并利用最终回弹补偿数据进行模具设计及试模验证。研究表明,试验与仿真结果基本吻合,最大偏差仅为0.2mm,翼子板回弹难以控制的问题得以解决。
Aiming at the problem of the large difference between the actual size deviation and the springback simulation of the automobile panel, a new full-process springback simulation method was proposed based on the analysis of the forming process of vehicle fender. Through the design of the minimum effective pad surface and the fillet avoidance of the pad, the plastic deformation caused by the pad closing was eliminated, then the springback simulation of each process was more accurate. And the concept of inherited compensation was introduced for the full process simulation. The compensation of the trimming and punching process which with a smaller springback was combined to the drawing and restriking with a larger springback. And the final springback compensation data was used for die design and trial verification. Research shows that the test and simulation results are basically in agreement, the maximum deviation is only 0.2 mm, and the problem of difficult control of the fender springback is solved.
作者
蒋磊
吕中原
王龙
谢蛟龙
马培兵
张雄飞
JIANG Lei;LV Zhongyuan;WANG Long;XIE Jiaolong;MA Peibing;ZHANG Xiongfei
出处
《汽车工程师》
2021年第3期22-27,共6页
Automotive Engineer
基金
国家自然科学基金面上项目(51775397)
国家重点研发计划项目(2017YFB0304405)。
关键词
翼子板
成形工艺
全工序
回弹仿真
自由回弹
塑性变形
继承补偿
Fender
Stamping process
Full-process
Springback simulation
Free springback
Plastic deformation
Inherited compensation
