Transactions of Materials and Heat Treatment

Title：Research on reduction in bending springback of multi-position progressive die

Authors： Qi Qian He Minhong Wang Shuxun

Unit： Jiangmen Polytechnic College

KeyWords： multi-position progressive die stamping process layout bending springback

ClassificationCode：TG76

year,vol(issue):pagenumber：2015,40(3):89-93

Abstract：

How to reduce bending springback in the continuous deformation process of the multi-position progressive die was studied．A cold-rolled and galvanized EGC-QS steel sheet was selected as the stamping workpiece material，which had a circular hole in each side of the two 90°bends and the two holes were required to be coaxial．At the same time，the springback of the workpiece must be in controll in order to ensure stamping quality and precision of the workpiece. According to the structure characteristics of the workpiece，the layout design for ten positions were completed．The press lines were designed on the bending line to reduce the springback. The convex correction structure was designed in the bending die to restrain the springback. The rough edge burr was cleaned before bending to reduce the stress concentration，and the step-by-step bending process was realized to reduce the deformation amount of each step．The trial of the progressive die was carried out by optimized process and die design structure. The experimental result shows that the excellent forming quality of the workpiece meets the requirements．

Funds：

2012年财政部、教育部中央专项资金职业教育实训基地建设项目（财教〔2012〕145号）；2012年广东省高职重点培育专业建设项目（粤财教〔2012〕445号）

祁倩（1985-），女，硕士，讲师

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