Laser welding of tailored blanks

Forsman, Tomas

doi:10.2351/1.5065739

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…The mechanical properties of welded joints are directly affected by the width of the weld surface and the transition morphology between thick plate and thin plate. Forsman et al [30] investigated the formability of laser welded tailored blanks by Erichsen test and found that the smallest weld width on the top surface had the best formability. In addition, the width of the weld surface should also be narrow from the aspects of weld appearance and corrosion resistance properties, so the weld width on the top surface is taken into account as a criterion to evaluate the weld quality.…”

Section: Optimization Of Dual-beam Laser Arrangement Based On Weld Prmentioning

confidence: 99%

“…While the tailored blanks are conducted using dual-beam laser welding, the arrangement mode I of the dual-beam laser (traverse arrangement), as shown in Figure 8, is usually employed to increase the welding efficiency and gap tolerance [12,21,30]. Namely, as shown in Figure 8, one laser beam irradiates on the thick plate and the other laser beam irradiates on the thin plate, and the line connecting focused spot centers of the dual-beam laser is perpendicular to the welding direction.…”

Section: Optimization Of Dual-beam Laser Arrangement Based On Weld Prmentioning

confidence: 99%

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Numerical Simulation Analysis of Dual-Beam Laser Welding of Tailored Blanks with Different Thicknesses

Zhang

Chen

et al. 2019

Metals

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In order to meet the requirements of alignment capability, gap tolerance and welding track control, dual-beam laser welding has been put forward to weld tailored blanks with different thicknesses. The arrangement mode and power ratio of dual-beam laser determine the heat transfer and temperature field distribution, and then influence the weld profile and weld quality. In this study, based on consideration of the temperature dependence of material physical properties, convection and radiation heat transfer, and material latent heat, the finite element model was developed. The model validated was conducted to compare with experimental results and it showed good agreement. The arrangement mode and power ratio of dual-beam laser welding were compared and optimized based on the consideration of the weld width on top surface and gap tolerance. Finally, the temperature field characteristics with the preferable process were analyzed in detail according to the numerical simulation. The calculated results indicated the weld width is mainly controlled by the laser irradiation on the thin plate, and dual-beam laser welding of tailored blanks has great advantages on improving heat transfer, weld profile and gap tolerance, which helps to reduce welding defects and enhance welding quality.

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Section: Optimization Of Dual-beam Laser Arrangement Based On Weld Prmentioning

confidence: 99%

Section: Optimization Of Dual-beam Laser Arrangement Based On Weld Prmentioning

confidence: 99%

Numerical Simulation Analysis of Dual-Beam Laser Welding of Tailored Blanks with Different Thicknesses

Zhang

Chen

et al. 2019

Metals

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“…激光拼焊技术因其多方面的优势，受到科学家与汽车企业的青睐。利用激光拼焊技术，不同材质、不同厚度，甚至不同涂层的板材均可以焊接在一起，形成理想的焊缝 [1][2][3][4][5][6] 可以直接应用在汽车上制造 [7][8] 。在汽车车身与零部件的生产中应用激光拼焊技术，既可以实现同等强度，又可以减轻汽车重量，同时，可以减少材料消耗和加工工序，在很大程度上提高企业生产效率，降低汽车的生产成本 [9][10][11][12][13][14] 。此外，与电阻点焊和电弧焊相比，激光焊接的优点在于单位热输入量少、热变形小、焊缝深宽比大、焊接速度高、焊缝强度普遍高于母材、镀层锌的损耗低 [15] 。焊缝凹陷是激光拼焊时常见的缺陷之一。激光拼焊焊缝的凹陷与激光功率密度、焊接速度有很大关系，但是被焊接件的配合间隙是更为主要的影响因素 [16][17] 。激光光斑尺寸很小，如果要同时落在两块板材的 Table 3 Orthogonal experiment design with zero butt joint gap…”

Section: 引言unclassified

Research on Car Galvanized Tailor-Welded Blanks of Fiber Laser Welding

Li¹,

Li²,

Wang³

et al. 2015

激光与光电子学进展

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The application of galvanized steel tailor-welded blanks not only improves the corrosion resistance property of a car, but also reduces vehicle weight while the intensity maintains the same. Compared with other welding technologies, laser welding has lots of advantages, such as a narrow welding line, a high strength joint and a small heat-affected zone. However, the gap between the plates can cause surface depression and intensity deficiency. After obtaining suitable parameters of side-blown shielding gas, orthogonal experiment is designed to have a research on laser power and welding speed′s influence on weld formation through tailored blank fiber laser welding. After that, metallurgical experiments, tensile tests and cupping tests are used to detect the performance, mechanical and deep stamping properties of the welding line. The result shows an optimum parameter when the laser power is 3 kW and the welding speed is 4 m/min. On the basis of optimal parameters obtained, a further study is made on gap′s influence on weld formation. The result shows that a nice welding line can be obtained when the gap is not more than 0.15 mm (about 11.1% of the plate thickness).

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“…TWB is the link between high safety requirements and affordable weight reduction. They are lighter, require less material and consolidate production operations [5,6].…”

Section: Introductionmentioning

confidence: 99%