Transactions of Materials and Heat Treatment

Title：Influences of drawbead and blank holder force on formability of stampings

Authors： Ke Guiyan Lu Ping Shi Jing Xin Xiumin

Unit： Huaqiao University Chongqing Lifan Car Co. Ltd.

KeyWords： drawbead blank holder force stamping

ClassificationCode：TG386.1

year,vol(issue):pagenumber：2016,41(5):39-43

Abstract：

The reasonable choices of drawbead and blank holder force are regarded as an effective method to reduce forming defects such as wrinkling, cracking, springback and insufficiently drawing in the stamping process. For the reinforcing plate of A column in the car, the influences of drawbead and blank holder forces on stamping quality of the workpiece were analyzed by the simulation software Dynaform, and the maximum springback along Z direction, the maximum edge movement of the material, the maximum thinning, the maximum thickening and the forming limit diagram were studied thoroughly under conditions of die surface with drawbead and without drawbead as well as the different blank holder forces. Simulation results show that under the condition of die surface with drawbead, the springback is reduced, the maximum thickening is decreased, and the wrinkling defect is decreased for formed workpiece. Furthermore, blank holder force has great influence on the forming quality of the workpiece, and the workpiece cracks when blank holder force is too large. Blank holder force of 100 kN is regarded as the optimum process parameter to form the reinforcing plate of A column according to the actual production which brings a good agreement with the simulation results.

Funds：

国家自然科学基金资助项目（51305144）；华侨大学中青年教师科研提升资助计划（ZQN-PY203）；福建省自然科学基金资助项目（2015J01203）；福建省科技计划重点项目（2008H0085）；华侨大学研究生科研创新能力培育计划资助项目

柯桂颜（1992-），男，硕士研究生路平（1980-），女，博士，副教授

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