Thread Rolling Analysis for Lead Screw Process Design

Lead Screw 공정 설계를 위한 전조 해석

  • Shin, Myoung-Soo (The Graduate School of NID, Seoul National University of Technology) ;
  • Cha, Sung-Hoon (The Graduate School of NID, Seoul National University of Technology) ;
  • Kim, Jong-Bong (Department of Automotive Engineering, Seoul National University of Technology) ;
  • Kim, Jong-Ho (Department of Die and Mould Design, Seoul National University of Technology) ;
  • Ra, Seung-Woo (Seoul Metal Co.)
  • 신명수 (서울산업대학교 NID융합기술대학원) ;
  • 차성훈 (서울산업대학교 NID융합기술대학원) ;
  • 김종봉 (서울산업대학교 자동차공학과) ;
  • 김종호 (서울산업대학교 금형설계학과) ;
  • 나승우 ((주)서울금속)
  • Published : 2009.12.31

Abstract

This paper presents the numerical analysis of thread rolling. Firstly, the analysis is focused on the effective analysis conditions that guarantee the reliability of the analysis results. The investigated parameters are the number of teeth and the number of elements. Using the analysis results, the number of elements and the number of teeth that guarantee the results are found. And then, the effects of the process parameters such as tool shape and temperature on the thread rolling are investigated. The analysis is carried out using DEFORM-3D. The results show that the flank angle and crest round have an effect on the thread rolling load. It is also shown that temperature have significant effects on the effective strain distribution, rolling load, and crack initiation. The crack initiation is predicted using the Cockcroft-Latham criterion.

References

  1. J. Schey, 'Introduction to Manufacturing Process', McGraw-Hill, 254 (1997)
  2. P. F. Ostwald and J. Munoz, 'Manufacturing processes and system', 9th Edition, 518 (1997)
  3. K .H. Kim, D. H. Kim, and B. K. Kim, 'Determination of optimum blank diameter for the high precision of spindle screw', Transactions of Materials Processing, 11, 710 (2002) https://doi.org/10.5228/KSPP.2002.11.8.710
  4. K. H. Kim, D. H. Kim, D. C. Ko, and B. K. Kim, 'Characteristics evaluation of process parameters for improvement the precision of tread rolling in lead screw', Proc. of KSPE Fall, 321 (2002)
  5. D. C. KO, J. M. Lee, and B. M. Kim, 'Development of form rolling technology for high precision worm using the rack dics of counter flow type', Journal of KSPE, 21, 57 (2004)
  6. J. P. Domblesky and F. Feng, 'A parametric study of process parameters in external thread rolling', Journal of Materials Processing Technology, 121, 341 (2002) https://doi.org/10.1016/S0924-0136(01)01223-7
  7. H. W. Lee, J. H. Song, G. A. Lee, H. J. Lee, K. D. Park, and S. M. Bae, 'Thread forming of a micro screw for storage devices using finite element analysis ', Proc. of Transactions of Materials Processing, Spring, 55 (2009)
  8. J. Chen and B. Young, 'Stress-strain curves for stainless steel at elevated temperatures', Engineering Structures, 28, 229 (2006) https://doi.org/10.1016/j.engstruct.2005.07.005
  9. J. Walters, 'Memorial Seminar on Metal Forming', A state of the art overview for industry, 5 (1997)
  10. J. R. Davis, 'Metals handbook', ASM International, 16, 9th Edition, 280 (1989)
  11. J. T, Drozda and C. Wick 'Tool and manufacturing engineering handbook', Society of Manufacturing Engineers, 1, 12 (1983)
  12. M.J. Cockcroft and D.J. Latham, 'Ductility and workability of metals', J. Inst. Metals, 96, 33 (1968)