Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
권호 표지
DOI QR코드

DOI QR Code

Study on Accuracy Evaluation of Laser Lens Changer for a Laser-Assisted Machining System

레이저보조가공에서 레이저 렌즈 교환장치의 정밀도 평가에 관한 연구

  • Oh, Won-Jung (School of Mechanical Engineering, Changwon National University) ;
  • Kim, Eun-Joong (School of Mechanical Engineering, Changwon National University) ;
  • Lee, Choon-Man (School of Mechanical Engineering, Changwon National University)
  • Received : 2015.06.29
  • Accepted : 2015.07.15
  • Published : 2015.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

LAM (Laser-Assisted Machining) is an effective method for processing difficult-to-cut workpieces. The focal length of a LAM system is changed by the change of the workpiece shape during laser preheating; this problem is solved by changing the lens of the laser module. Linear- and rotary-type lens changers were developed to change the laser lens of a LAM system. The linear-type lens changer is operated by a motor with a ball-screw, and the rotary type is operated by a stepping motor. The natural frequency and structural stability of the laser lens changers were confirmed by using a finite element analysis; in addition, the functions of the lens changers were verified by measuring the iterative accuracy. The measured results show that the rotary-type lens changer is more accurate than the linear-type changer.

Keywords

References

  1. Ezugwu, E., "Key Improvements in the Machining of Difficult-to-Cut Aerospace Superalloys," International Journal of Machine Tools and Manufacture, Vol. 45, No. 12-13, pp. 1353-1367, 2005. https://doi.org/10.1016/j.ijmachtools.2005.02.003
  2. Pfefferkorn, F. E., Incropera, F. P., and Shin, Y. C., "Heat Transfer Model of Semi-Transparent Ceramics Undergoing Laser-Assisted Machining," International Journal of Heat and Mass Transfer, Vol. 48, No. 10, pp. 1999-2012, 2005. https://doi.org/10.1016/j.ijheatmasstransfer.2004.10.035
  3. Sun, S., Brandt, M., and Dargusch, M., "Thermally Enhanced Machining of Hard-to-Machine Materials-A Review," International Journal of Machine Tools and Manufacture, Vol. 50, No. 8, pp. 663-680, 2010. https://doi.org/10.1016/j.ijmachtools.2010.04.008
  4. Research Report of the National Research Foundation of Korea, "A New Conceptual 3-Dimensional Laser Assisted Machining System," No. 2013035186, 2014.
  5. Yilbas, B. S., "Laser Short-Pulse Heating: Moving Heat Source and Convective Boundary Considerations," Physica A: Statistical Mechanics and Its Applications, Vol. 293, No. 1, pp. 157-177, 2001. https://doi.org/10.1016/S0378-4371(00)00616-6
  6. Kim, D.-H. and Lee, C.-M., "A Study of Cutting Force and Preheating-Temperature Prediction for Laser-Assisted Milling of Inconel 718 and AISI 1045 Steel," International Journal of Heat and Mass Transfer, Vol. 71, pp. 264-274, 2014. https://doi.org/10.1016/j.ijheatmasstransfer.2013.12.021
  7. Jeon, Y. and Lee, C. M., "Current Research Trend on Laser Assisted Machining," Int. J. Precis. Eng. Manuf., Vol. 13, No. 2, pp. 311-317, 2012. https://doi.org/10.1007/s12541-012-0040-4
  8. Kim, K.-S., Kim, T.-W., and Lee, C.-M., "Analysis of a Laser Assisted Milling Process with Inclination Angles," Int. J. Precis. Eng. Manuf., Vol. 14, No. 8, pp. 1495-1499, 2013. https://doi.org/10.1007/s12541-013-0201-0
  9. Sim, M.-S. and Lee, C.-M., "A Study on the Laser Preheating Effect of Inconel 718 Specimen with Rotated Angle with Respect to 2-Axis," Int. J. Precis. Eng. Manuf., Vol. 15, No. 1, pp. 189-192, 2014. https://doi.org/10.1007/s12541-013-0324-3
  10. Woo, W. S. and Lee, C. M., "An Analytical Study on the Preheating Effect of Workpiece with Cylindrical Shape for 3-Dimensional Laser-Assisted Milling," J. Korean Soc. Precis. Eng., Vol. 32, No. 2, pp. 173-178, 2015. https://doi.org/10.7736/KSPE.2015.32.2.173
  11. Sim, M. S., Hwang, S. J., Kim, D. H., and Lee, C. M., "A Study on the Development of the Rotary and Linear Laser Modules," J. Korean Soc. Precis. Eng., Vol. 31, No. 2, pp. 119-123, 2014. https://doi.org/10.7736/KSPE.2014.31.2.119
  12. Jo, E. H., Yang, H. S., and Lee, Y. W., "Measurement of Large Mirror Surface Using a Laser Tracker," Korean Journal of Optics and Photonics, Vol. 24, No. 6, pp. 331-337, 2013. https://doi.org/10.3807/KJOP.2013.24.6.331
  13. Kim, S. H., Kim, B. H., and Jin, Y. K., "A Study on the Rotation Accuracy according to Unbalance Variation of High Precision Spindle Unit for Machine Tool," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 11, No. 3, pp. 174-181, 2012.
  14. Kang, D. and Lee, C., "A Study on the Development of the Laser-Assisted Milling Process and a Related Constitutive Equation for Silicon Nitride," CIRP Annals-Manufacturing Technology, Vol. 63, No. 1, pp. 109-112, 2014. https://doi.org/10.1016/j.cirp.2014.03.087

Cited by

  1. Study on the Preheating Method of NURBS Shaped Workpiece by Laser Assisted Machining vol.33, pp.2, 2016, https://doi.org/10.7736/KSPE.2015.33.2.101