锻压技术

Strenx960先进高强钢折弯回弹控制

英文标题：Bending springback control of advanced high-strength steel Strenx960

作者：郑淇文朱春东郭宇航石磊

单位：1.武汉理工大学材料科学与工程学院湖北武汉 2.随州武汉理工大学工业研究院

分类号：TG386

出版年,卷(期):页码：2020,45(11):25-29

摘要：

使用瑞典先进高强钢Strenx960作为伸缩臂的制造材料，研究多种工艺参数对Strenx960高强钢折弯工艺的影响规律。通过成分及力学性能试验获得Strenx960高强钢的各项材料参数，以板料厚度、凸模圆角半径、摩擦系数及冲压速度等工艺参数为自变量设计正交试验，结合有限元数值模拟确定了较优的工艺方案。结果表明：板料厚度、凸模圆角半径、摩擦系数对Strenx960高强钢V型折弯回弹及开裂有着重要的影响，而冲压速度的影响较小。当板料厚度为3 mm、凸模圆角半径为12 mm、板料与凹模的摩擦系数为0.2、冲压速度为120 mm·s-1时，Strenx960高强钢的回弹角度为11.7°，折弯处并未产生开裂，通过实际试验验证了折弯件质量良好。

Swedish advanced high-strength steel Strenx960 was used as the manufacturing material of telescopic boom, and the influence laws of various process parameters on the bending process of high-strength steel Strenx960 were studied. Then, the material parameters of high-strength steel Strenx960 were obtained by the component and mechanical performance tests, and taking plate thickness, punch fillet radius, friction coefficient, stamping speed and other process parameters as the independent variables, the orthogonal test was designed. Furthermore, the better process scheme was determined by combining finite element numerical simulation. The results show that the plate thickness, the punch fillet radius and the friction coefficient have important effects on V-shaped bending springback and cracking of high-strength steel Strenx960, while the impact of stamping speed is smaller. When the plate thickness is 3 mm, the punch fillet radius is 12 mm, the friction coefficient between plate and die is 0.2, and the stamping speed is 120 mm·s-1, the springback angle of high-strength steel Strenx960 is 11.7°, no cracking occurs at the bending area, and the quality of bending parts is proved to be good by practical test.

基金项目：

随州市新能源、轻量化、智能化关键核心技术研发项目(随科发［2019］9号)

郑淇文（1996-），男，硕士研究生 E-mail：zqiwen1996@outlook.com;通讯作者：朱春东（1963-），男，硕士，教授 E-mail：zcdzcd6252@sina.com

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