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Investigation of Cracking Condition during Press Forming of Extruded Aluminum Sheets

알루미늄 압출판재의 프레스성형 중 파열조건에 대한 조사

  • Chu, Seok Jae (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Park, Chang Gu (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Cho, Eun Hwa (School of Mechanical Engineering, Univ. of Ulsan)
  • 주석재 (울산대학교 기계공학부) ;
  • 박창구 (울산대학교 기계공학부) ;
  • 조은화 (울산대학교 기계공학부)
  • Received : 2013.06.24
  • Accepted : 2013.11.19
  • Published : 2014.03.01

Abstract

Sunroof tracks are manufactured by press-forming extruded aluminum sheets. During press forming, cracking occurs along the sharply bent edge. The final positions of the punch and die were measured on the section, and their relation to cracking was investigated. Finite element simulation of bending to the final position was done to find the critical strains. Three-point bending tests with different material orientations, hardnesses, bending edge lengths, and bending radii were carried out in the laboratory, and finite element simulation of the three-point bending tests was performed to find the critical strains.

Keywords

Cracking;Extruded Aluminum Sheets;Bending;Finite Element Simulation;Forming Limit Diagram

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