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Numerical optimization approaches of single-pulse conduction laser welding by beam shape tailoring

机译：光束形状定制的单脉冲传导激光焊接数值优化方法

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摘要

While circular laser beams are usually applied in laser welding, for certain applications tailoring of the laser beam shape, e.g. by diffractive optical elements, can optimize the process. A case where overlap conduction mode welding should be used to produce a C-shaped joint was studied. For the dimensions studied in this paper, the weld joint deviated significantly from the C-shape of the single-pulse laser beam. Because of the complex heat flow interactions, the process requires optimization. Three approaches for extracting quantitative indicators for understanding the essential heat flow contributions process and for optimizing the C-shape of the weld and of the laser beam were studied and compared. While integral energy properties through a control volume and temperature gradients at key locations only partially describe the heat flow behaviour, the geometrical properties of the melt pool isotherm proved to be the most reliable method for optimization. While pronouncing the C-ends was not sufficient, an additional enlargement of the laser beam produced the desired C-shaped weld joint. The approach is analysed and the potential for generalization is discussed. (C) 2015 Elsevier Ltd. All rights reserved.
机译：虽然通常在激光焊接中施加圆形激光束，但是对于某些应用，例如，对激光束形状进行定制。通过衍射光学元件，可以优化工艺。研究了使用重叠传导模式焊接来生产C形接头的情况。对于本文研究的尺寸，焊接接头明显偏离了单脉冲激光束的C形。由于复杂的热流相互作用，该过程需要优化。研究并比较了三种提取定量指标的方法，这些方法可用于理解基本的热流贡献过程以及优化焊缝和激光束的C形。虽然通过关键位置处的控制量和温度梯度的积分能量属性仅部分描述了热流行为，但熔池等温线的几何属性被证明是最可靠的优化方法。虽然说出C端是不够的，但是激光束的进一步扩大产生了所需的C形焊接接头。分析了该方法，并讨论了泛化的潜力。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Optics and Lasers in Engineering》 |2016年第4期|48-54|共7页
  • 作者

    Sundqvist J.; Kaplan A. F. H.; Shachaf L.; Brodsky A.; Kong C.; Blackburn J.; Assuncao E.; Quintino L.;

  • 作者单位

    Lulea Univ Technol, Dept Engn Sci & Math, S-97187 Lulea, Sweden;

    Lulea Univ Technol, Dept Engn Sci & Math, S-97187 Lulea, Sweden;

    Holo Or Ltd, POB 1051, IL-76114 Rehovot, Israel;

    Holo Or Ltd, POB 1051, IL-76114 Rehovot, Israel;

    TWI Ltd, Granta Pk, Cambridge CB21 6AL, England;

    TWI Ltd, Granta Pk, Cambridge CB21 6AL, England;

    Univ Lisbon, Inst Super Tecn, IDMEC, LAETA, P-1049001 Lisbon, Portugal|EWF, P-2740120 Porto Salvo, Portugal;

    Univ Lisbon, Inst Super Tecn, IDMEC, LAETA, P-1049001 Lisbon, Portugal|EWF, P-2740120 Porto Salvo, Portugal;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Laser welding; Heat transfer; Diffractive optic; Conduction weld; Beam shaping;

    机译：激光焊接;传热;衍射光学;传导焊接;光束整形;

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