摘要
翻边成形边部开裂包含减薄开裂和起皱开裂两种类型.针对某车型QP980钢门槛隔板零件存在的翻边成形边部开裂问题,对开裂零件样板进行基本力学性能检测、零件开裂部位断面研究;基于AutoForm软件对原工艺方案进行了全流程仿真分析,提出坯料优化方案,并从成形、主次应变状态、减薄等方面对新方案进行了评估;此外,对开裂零件的模具状态和修边质量进行现场优化,并对优化后的坯料方案进行现场零件试冲.结果表明：坯料优化后,起皱开裂区域增厚由18.6%降低至10.4%,起皱现象明显改善;优化模具表面状态能有效改善成形后零件表面拉毛情况,减薄开裂区域的开裂现象消除;采用激光切割获得优化后坯料,成形后零件无肉眼可见的起皱及开裂,此外零件边部质量改善明显.通过研究,总结出影响QP980钢门槛隔板零件翻边成形边部开裂问题的主要因素,便于指导后续零件设计及量产稳定.
The edge cracking in flanging consists of thinning cracking and wrinkling cracking. For the problems of edge cracking in the flanging process of threshold partition part for steel QP980, the basic mechanical properties of sample sheet for cracked part was tested, and the cracking section of part was researched. Then,the whole process simulation of original scheme was performed by software Auto-Form,and an optimum scheme of blank was proposed. Furthermore,the new scheme was evaluated on formability, major and minor stain and thinning. In addition,the surface state of die and the trimming quality of cracked part were optimized,and the trial part was punched by the optimum scheme. The results show that after the optimization of blank, the thickness of wrinkling cracking area decreases from 18.6% to 10.4%,and the wrinkling phenomenon is improved. The optimization of die surface state can effectively improve the surface galling of forming part, and the cracking in thinning area is eliminated. The optimized blank was obtained by laser cutting. The wrinkles or cracks cannot be seen in the forming part,and the edge quality of part is improved obviously. Finally, the main factors affecting the edge cracking of flanging for threshold partition part of steel QP980 were summed up,which could guide the design of follow-up parts and ensure the stability of mass production.
出处
《锻压技术》
CAS
CSCD
北大核心
2018年第1期53-59,共7页
Forging & Stamping Technology
关键词
QP980钢
门槛隔板
翻边成形
边部开裂
起皱
steel QP980
threshold partition
flanging forming
edge cracking
wrinkling
