• Title/Summary/Keyword: $CO_2$ 레이저 용접

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Mechanical characteristics and bead geometry according to laser welding parameters for tailor-welded-branks of hot press forming steel (레이저용접을 이용한 핫프레스포밍강의 맞춤식 재단 용접강판에서 용접공정변수에 따른 기계적 특성 및 비드형상)

  • Kang, Minjung;Kim, Cheolhee;Seo, Jong Dock;Lim, Chang Young
    • Laser Solutions
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    • v.18 no.2
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    • pp.5-10
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    • 2015

  • A tailor welded blank (TWB) is a welded blank comprised of two or more sheets with different properties - thickness, strengths or formabilities. TWBs are applied to the body panels to reduce weight and cost of the part. In this research, ultra high strength steel and high ductility steel were joined and laser tailor welded blanks were implemented. Yb:YAG laser welding tests were conducted with various welding conditions, and mechanical and geometrical characteristics of weldments were evaluated.

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A Study on the $CO_2$ Laser Beam Welding of Thin Steel Sheets and Tailored Blanks - Between Similar Thin Sheet Materials - (박판의 $CO_2$레이저 빔 용접과 소재접합일체성형에 관한 연구- 동질 박판재간 -)

  • 이희석;배동호
    • Journal of Welding and Joining
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    • v.15 no.2
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    • pp.54-63
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    • 1997

  • For the purpose of establishing laser welding condition (laser power, welding speed and beam focus) and of evaluating tailored blanks for two kinds of thin steel sheets SPCC and SK5M using in the thin plate structure such as automobile, train, and so on, investigated their $CO^2$ laser weldability under various initial welding conditions. SPCC thin sheet showed good weldability under some welding conditions. But, high carbon steel sheet SK5M needed heat treatment after welding to obtain ductility of the welded joint. And next, tailored blank was tested through deep drawing to evaluate reliability of their obtained laser welding conditions. The forming depths by tailored blank were SPCC+SPCC=22-25mm and SK5M+SK5M=13-25mm.

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A study on classification of weld quality in high tensile TRIP steel welding for automotive using $CO_2$ laser ($CO_2$ 레이저를 이용한 자동차용 고장력 TRIP 강 용접의 용접부 품질 분류에 대한 연구)

  • 박영환;박현성;이세헌
    • Laser Solutions
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    • v.5 no.3
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    • pp.21-30
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    • 2002

  • In automotive industry, the studies about light weight vehicle and improving the productivity have been accomplished. For that, TRIP steel was developed and research for the laser welding process have been performed. In this study, the monitoring system using photodiode was developed for laser welding process of TRIP steel. With measuring light, neural network model for estimating bead width and tensile strength was made and weld quality classification algorithm was formulated with fuzzy inference method.

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Effects of laser and arc power on the penetration depth in $CO_2$ laser-MIG hybrid welding ($CO_2$ 레이저-MIG 하이브리드 용접부 용입깊이에 미치는 레이저 및 아크 출력의 영향)

  • 홍승갑;이종봉
    • Proceedings of the KWS Conference
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    • 2003.05a
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    • pp.81-83
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    • 2003

  • The potential advantages of the hybrid welding process are improved weld penetration, enhanced gap tolerance, control of weld metal composition, and improved weld quality in comparison to laser or arc welding. Especially, the deep penetration of hybrid welding is very attractive in welding of thick plates. In this study, therefore, the influence of arc power in hybrid welding on detailed bead dimensions at different laser power levels was investigated.

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