后轮罩封板翻边工艺优化研究

Study on Optimized Flanging Process of the Cover Plates of Auto Rear Wheel

以汽车后轮罩封板为研究对象,对其翻边成形工艺进行分析,指出翻边缺陷产生的实质是翻边边缘切向应变的绝对值超过成形极限;以减小翻边边缘处切向应变绝对值为优化指标,对影响翻边成形性能的三个工艺参数:压边力、摩擦润滑条件、模具间隙进行正交设计,运用有限元模拟软件Dynaform进行模拟试验得到优化工艺方案;最后对优化方案进行实验验证,结果表明,数值模拟试验是可靠的,得到的优化方案可以避免翻边成形中的缺陷。

Aiming at the flanging process of the cover plates of auto rear wheel, this paser first analyzed the flanging process then pointed out that the substance of its defect is the absolute values of tangentialstrain of flanged edges exceeds the forming limit. With the optimization objective of minimum the the absolute values of tangentialstrain, three parameters, which have great influence on the formability of flanging process, Blank Holder Force, Friction Lubrication Condition and Model Clearance are optimized by Orthogonal design , and then tests are carried out by FEA software Dynaform to obtained the optimized process scheme; lastly, flanging experiment is conducted to verify the optimized process scheme . The results shows that numerical simulation test is reliable and the optimized process scheme can avoid the defects of flanging process.