Simulation based Process Design of Flat Die Thread Rolling for Micro Screw

마이크로 스크류의 해석기반 판형 전조성형공정 연구

  • 박기동 (한국생산기술연구원 융합생산기술연구부) ;
  • 송정한 (한국생산기술연구원 융합생산기술연구부) ;
  • 이혜진 (한국생산기술연구원 융합생산기술연구부) ;
  • 이근안 (한국생산기술연구원 융합생산기술연구부) ;
  • 이낙규 (한국생산기술연구원 융합생산기술연구부) ;
  • 이형욱 (충주대학교 에너지시스템공학과) ;
  • 나승우 ((주)서울금속)
  • Published : 2009.10.08

Abstract

There have been strong demands for micro size screw with high precision due to miniaturization and integration trends for electronic products such as Hard Disk Drives. The thread rolling process for screw manufacturing are lower unit cost, reduced material utilization, and superior mechanical properties compared to the machining process. But little work has been done on the thread rolling of micro size screw. In this paper, we investigate thread rolling process using Finite Element Analysis (FEA) and parameter study for screw manufacturing. And we also carried out compression tests to obtain the material property and to implement into the FE tool for the numerical simulation. In case that parameter of relative position oldies is half length of pitch for maintaining the continuous thread profiles, we found that shear friction factor was 0.9 during the thread rolling process using FEA. We are trying to develop the thread rolling process using the FE-simulation to manufacture screws which have been commonly produced from the industrial level fabrication at present.

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