Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Influences of Process Conditions on the Surface Expansion and Contact Pressure in Backward Can Extrusion of Al Alloys

알루미늄 합금을 이용한 후방압출에 의한 캔 성형시 성형 조건이 표면확장과 접촉 압력에 미치는 영향

  • 민경호 (인하대학교 대학원 기계공학과) ;
  • 서정민 (인하대학교 대학원 기계공학과) ;
  • 구훈서 (인하대학교 대학원 기계공학과) ;
  • 비스라 (인하대학교 대학원 기계공학과) ;
  • 탁상현 (인하대학교 대학원 기계공학과) ;
  • 이인철 (인하대학교 대학원 기계공학과) ;
  • 황병복 (인하대학교 기계공학부)
  • Published : 2007.11.01
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Abstract

This paper is concerned with the analysis on the surface expansion of AA 2024 and AA 1100 aluminum alloys in backward extrusion process. Due to heavy surface expansion appeared usually in the backward can extrusion process, the tribological conditions along the interface between the material and the punch land are very severe. In the present study, the surface expansion is analyzed especially under various process conditions. The main goal of this study is to investigate the influence of degree of reduction in height, geometries of punch nose, friction and hardening characteristics of different aluminum alloys on the material flow and thus on the surface expansion on the working material. Two different materials are selected for investigation as model materials and they are AA 2024 and AA 1100 aluminum alloys. The geometrical parameters employed in analysis include punch corner radius and punch nose angle. The geometry of punch follows basically the recommendation of ICFG and some variations of punch geometry are adopted to obtain quantitative information on the effect of geometrical parameters on material flow. Extensive simulation has been conducted by applying the rigid-plastic finite element method to the backward can extrusion process under different geometrical, material, and interface conditions. The simulation results are summarized in terms of surface expansion at different reduction in height, deformation patterns including pressure distributions along the interface between workpiece and punch, comparison of surface expansion between two model materials, geometrical and interfacial parametric effects on surface expansion, and load-stroke relationships.

Keywords

References

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  3. Surface stresses and flow modes on contact surface in a combined double cup extrusion process vol.64, 2013, https://doi.org/10.1016/j.triboint.2013.03.018