한국생산제조학회지 (Journal of the Korean Society of Manufacturing Technology Engineers)

  • 제24권1호
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  • Pages.31-37
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  • 2015
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  • 2508-5093(pISSN)
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  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
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초극박재 냉연코일의 연속조업을 위한 Laser Line Welder

Laser Line Welder for Continuous Operation of Cold-rolled Steel Coil

  • Choi, Jun (Engineering Research Center, POSCO)
  • 투고 : 2014.04.30
  • 심사 : 2014.10.14
  • 발행 : 2015.02.15
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초록

A laser line welder using a solid-state laser (Yb:YAG) has been manufactured for joining ultra-thin cold-rolled steel coils in steelworks. The coils to be welded primarily range from 0.15 to 0.3 mm in thickness and 800 to 1,100 mm in width. Because the steel plate is extremely thin, it is very important to control the stop positions of the clamp at cutting and welding points. In this study, both hydraulic proportional control valves and LVDT sensor embedded cylinders were used to precisely control and monitor the positions of clamps with complementary stoppers. As a result, the positions could be controlled within an error of ${\pm}30{\mu}m$. Erichsen cupping tests on the welded joints show that the Erichsen index ranges from 4.4 to 4.6 mm. Furthermore, the tensile strength of welding points is comparable to that of the base metal.

키워드

참고문헌

  1. Ito, M., Yokozawa, F., Kawai, Y., Tachbana, R., 1999, Welding Characteristics of Stainless Steel in 10 kW Laser Beam Welder, ISIJ International 39:7 737-741. https://doi.org/10.2355/isijinternational.39.737
  2. Mahrle, A. et al., 2011, Process Characteristics of Fibrelaser- assisted Plasma Arc Welding, Journal of Physics D: Applied Physics, 44:34 345502.
  3. Lancaster, J.F., 1984, The Physics of Welding, Physics in Technology, 15:2 73. https://doi.org/10.1088/0305-4624/15/2/I05
  4. Yan, J., Gao, M., and Zeng, X., 2010, Study on Microstructure and Mechanical Properties of 304 Stainless Joints by TIG, Laser and Laser-TIG Hybrid Welding, Optics and Lasers in Engineering, 48 512-517. https://doi.org/10.1016/j.optlaseng.2009.08.009
  5. Lee, K. R., Hwang, C. Y., Yang, Y. S., Park, E. K., and Yoo, Y. T., 2013, The Porosity Control Technology of Lap Joint Using Continuous Wave Nd:YAG Laser of the Low Carbon Steel SS41, Journal of the Korean Society of Manufacturing Technology Engineers, 22:4 665-672. https://doi.org/10.7735/ksmte.2013.22.4.665
  6. Wang, W., Lu, B., Liu, C., Zhang, D., and Luo, Y., 2003, The Morphology of Pulsed Laser-induced Damage on the Surface of a Copper Film Mirror, Optics & Laser Technology, 35 303-307. https://doi.org/10.1016/S0030-3992(03)00023-9
  7. TRUMPF Technical Documentation Department, 2007, Laser Machining Solid-state Lasers, TRUMPF GmbH.
  8. Iqbal, S., Gualini, M.M.S., and Grassi, F., 2007, Laser Welding of Zinc-coated Steel with Tandem Beams: Analysis and Comparison, Journal of Materials Processing Technology, 184 12-18. https://doi.org/10.1016/j.jmatprotec.2006.10.043
  9. Sharma, R. S., and Molian, P., 2011, Weldability of Advanced High Strength Steels Using an Yb:YAG Disk Laser, Journal of Materials Processing Technology, 211 1888-1897. https://doi.org/10.1016/j.jmatprotec.2011.06.009
  10. Manesh, H. D., and Taheir, A. K., 2003, Bond Strength and Formability of an Aluminum-clad Steel Sheet, Journal of Alloys and Compounds, 361 138-143. https://doi.org/10.1016/S0925-8388(03)00392-X