Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Burr Control in Meso-Punching Process

  • Shin Hong Gue (Division of Mechanical Engineering and Mechatronics, Kangwon National University) ;
  • Shin Yong Seung (Division of Mechanical Engineering and Mechatronics, Kangwon National University) ;
  • Kim Byeong Hee (Division of Mechanical Engineering and Mechatronics, Kangwon National University) ;
  • Kim Heon Young (Division of Mechanical Engineering and Mechatronics, Kangwon National University)
  • Published : 2005.04.01
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Abstract

The shearing process for the sheet metal is normally used in the precision elements such as semi-conductor components. In these precision elements, the burr formation brings a bad effect on the system assembly and demands the additional de-burring process, so this imposes high cost on manufacturing. In this paper, we have developed the in-situ auto-aligning precision meso-punching system to investigate the burr formation mechanism and ultimately minimize burr. Firstly, we introduced the punch-die contact sensing method to align the punch and the die at initial state prior to the punching process. Secondly, by using the low-price semi-con­ductor laser, burr formed on the edges is measured intermittently during the punching process. We could, finally, make burr on the sheet metal uniformized and minimized by controlling of the precision X - Y table, $1\;{\mu}m$ resolution, and measuring burr height by semiconductor laser. Experimental results show the validity of our system for pursuing the burr-free punched elements.

Keywords

References

  1. Gillespie, L. K., 1979, 'Deburring Precision Miniature Parts,' Precision Eng., 1 (4), pp. 189-198 https://doi.org/10.1016/0141-6359(79)90099-0
  2. Chang, T. M. and Swift, H. W., 1950, 'Shearing of Metal Bars,' J. of Inst. Metals, 78, p. 393
  3. Johnson, W. and Slater, R., 1967, 'Survey of Slow and Fast Blanking of Metals at Ambient and High Temperatures,' Proc. of the international Conference of Manufacturing Technology CIRP-ASTME, pp. 825-851
  4. Holiga, L. A., 1965, 'Punch to Die Clearance,' ASTME 33rd Annual Meeting, 65(2)
  5. Atkins, A. G., 1980, 'On Cropping and Related Process,' Int. J. of Mechanical Sciences, 22, pp. 215-231 https://doi.org/10.1016/0020-7403(80)90037-5
  6. Choy, C. M. and Balendra, R., 1996, 'Experimental Analysis of Parameters Influencing Shear-ed-edge Profiles,' Proc. of the 4th Int. Conference on Sheet Metal, pp. 101-110
  7. Lee, W. B., Cheung, C. F., Chan, L. K. and Chiu, W. M., 1997, 'An Investigation of Process Parameters in the Dam-bar Cutting of Integrated Circuit Packages,' J. of Materials Processing Technology, 66, pp. 63-72 https://doi.org/10.1016/S0924-0136(96)02496-X
  8. Li, M., 2000, 'An Experimental Investigation on Cut Surface and Burr in Trimming Aluminum Automotive Sheet,' Int. J. of Mechanical Science, 42, pp. 889-906 https://doi.org/10.1016/S0020-7403(99)00033-8
  9. Li, M., 2000, 'Micromechanisms of Deformation and Fracture in Shearing Aluminum Alloy Sheet,' Int. J. of Mechanical Science, 42, pp. 907-923 https://doi.org/10.1016/S0020-7403(99)00034-X
  10. Raulea, L. V., Goijaerts, A. M., Govaert, L. E. and Baaijens, F. P., 2001, 'Size Effects in the Processing of Thin Metal Sheets,' J. of Materials Processing Technology, 115(22), pp. 44-48 https://doi.org/10.1016/S0924-0136(01)00770-1
  11. Wilson, J. and Hawkes, J. F. B., 1987, Laser Principles and Applications, Prentice Hall, p. 108