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Investigation on wear-induced edge passivation of fine-blanking punch

  • Qide Zheng
  • Xincun ZhuangEmail author
  • Zhisheng Gao
  • Mingwen Guan
  • Zhenwen Ding
  • Yongfang Hong
  • Zhen Zhao
ORIGINAL ARTICLE
  • 54 Downloads

Abstract

Edge passivation of the punch is a common phenomenon that is induced by wear and which would affect tool life and part quality. To investigate the edge passivation of fine-blanking punch, a wear tester based on sheet metal extrusion was designed. The relevance of the designed tester in terms of the stress state to the fine-blanking process was analyzed via finite element methods. Meanwhile, material flow at the punch edge was studied with pad printing technology, and the effects of the punch geometry and extrusion stroke on the worn profile have been discussed. The results shows that reducing the length of straight lines and radius of arcs results in a large relative sliding distance of material at the punch edge, and for a punch with circular and linear edges, wear on the circular segment is more severe than that on the linear segment. In addition, from the viewpoint of simulation, adaption of the wear coefficient in different periods could lead to a more precise worn profile of the punch.

Keywords

Edge passivation Sheet metal extrusion Worn profile Wear coefficient 

Notes

Funding information

This work was supported by the National Nature Science Foundation of China (51575345) and National Science & Technology Major Project (2018ZX04024001) of China.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute of Forming Technology and Equipment, School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghaiChina
  2. 2.National Engineering Research Center of Die & Mold CADShanghai Jiao Tong UniversityShanghaiChina
  3. 3.Suzhou Dongfeng Fineblanking Engineering Co. Ltd.SuzhouChina

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