锻压技术

某型轿车门框三维拉弯模具设计方法研究

英文标题：Research on design method of three-dimensional stretch bending die for doorframe of a car

作者：王强黄世军胥少东胡凌峰樊晓建

分类号：TG302；TG306

出版年,卷(期):页码：2014,39(5):51-55

摘要：

为减少某型轿车门框的三维拉弯回弹，通过单向拉伸试验，获得了SPCC材料的弹性模量、抗拉强度、屈服强度、应变硬化模量等材料的力学性能参数和真实的应力-应变曲线方程。基于板料弯曲回弹计算，给出了拉弯件内层材料的回弹前和回弹后曲率半径的关系以及回弹半径的表达式。在此基础上，提出将工件形线离散化，计算工件回弹前的形线方法，确定拉弯模形线，并进一步绘制拉弯模外形。根据理论分析结果，设计门框的三维拉弯模具，进行拉弯试验，并得到了合格的工件，验证了该方法适用于拉弯模具的设计。

In order to reduce the three-dimensional stretch bending springback of doorframe of a car, uniaxial tensile test method was used to obtain the basic performance parameters such as elastic modulus, ultimate strength, yield strength, strain hardening modulus, etc. and true stress-strain curve equation for the SPCC material. The relationship between curvature radii of inner before and after springback and springback radius expression for stretch bending workpiece were given based on bending springback calculation of sheet metal. On the basis of analysis, a workpiece discrete method was proposed to calculate the shape line before springback, and the method was used to determine the shape line of bending die and further draw its shape. According to the results of theoretical analysis, the three-dimensional bending die of doorframe was designed, and the qualified workpieces were obtained by bending test. The results show that the method is suitable for the design of stretch bending die.

基金项目：

秦皇岛市科技支撑计划（201101A139）

王强（1980-），男，硕士研究生，工程师黄世军（1980-），男，博士，讲师

参考文献：

［1］孙惠学，胡金华，李春科，等. 奥迪轿车门竖框拉弯成形弹复分析[J].塑性工程学报,1998,5(3):32-34.Sun Huixue, Hu Jinhua, Li Chunke, et al. Vertical frame's pull-bend forming spring-back analisys of audi auto door [J]. Journal of Plasticity Engineering, 1998, 5(3):32-34.
［2］钱志平，吕玫.金属型材三维拉伸弯曲设备[J].新技术新工艺,2001,(7):38.Qian Zhiping,Lv Mei.Three dimensional stretch bending equipment of metal sections[J].New Technology & New Process, 2001,(7):38.
［3］钱志平，吕玫.拉弯成形中导轨型材的回弹计算[J].金属成形工艺,2001, 19(3):19-21.Qian Zhiping,Lv Mei.Calculation of spring back on stretch bending metal sections of cars middle sliding rail[J].Metal Forming Technology, 2001,19(3):19-21.
［4］钱志平，吕玫，高才良.中导轨拉弯成形截面畸变控制及模具设计[J].锻压技术,2001,26(3):47-48.Qian Zhiping,Lv Mei,Gao Cailiang. Section distortion control and die design on stretch bending sections [J].Forging & Stamping Technology, 2001,26(3):47-48.
［5］刁可山，周贤宾，金朝海，等.复杂截面型材力控制拉弯成形数值模拟分析[J].材料科学与工艺,2004,12(4):413-416.Diao Keshan, Zhou Xianbin, Jin Chaohai, et al. A numerical study on the force controlled stretch bending of aluminum extrusion with complex cross section[J]. Materials science & technology, 2004, 12(4):413-416.
［6］谢邵辉，柳玉起，杜亭，等.型材拉弯模拟算法的开发及应用[J].锻压技术,2011,36(4):39-43.Xie Shaohui, Liu Yuqi, Du Ting, et al. Development and application of numerical simulation algorithm for extrusion stretch forming[J]. Forging & Stamping Technology, 2011, 36 (4):39-43.
［7］胥少东.B299轿车门框拉弯工艺研究及数值模拟[D].秦皇岛：燕山大学，2008.Xu Shaodong. Stretch Bending Technical Research and Numerical Simulation of B299 Doorframes [D]. Qinhuangdao: Yanshan University,2008.
［8］陈毓勋.板材与型材弯曲回弹控制原理与方法[M].北京:国防工业出版社,1990.Chen Yuxun. The Control Principle of Springback for Sheet and Profiled Beam [M]. Beijing: National Defense Industry Press,1990.

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