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首页> 外文会议>Conference on Photon Processing in Microelectronics and Photonics Jan 21-24, 2002 San Jose, USA >Laser Beam Micro Welding in Watch Industry
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Laser Beam Micro Welding in Watch Industry

机译：钟表行业的激光束微焊接

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摘要

After the invention of the laser principle and its first application for drilling of jewels in watch movements, the laser was only used for marking. The still ongoing trend of miniaturisation and automation opened a new field of application: laser beam micro welding. This paper gives an overview of the new application of laser beam welding in watch industry. The combination of dissimilar materials like brass and stainless steel is often needed in watch movements due to tribologic aspects. Here, laser beam micro welding offers an alternative to conventional joining techniques like press fit or gluing. Since the watch components are very small the locally limited heat input of the laser beam offers the possibility of weld seam widths <200 μm. The depth and the width of the closed weld seam as well as the surface quality can be influenced especially at the end of the seam using the pulse forming capability of a pulsed Nd: YAG laser. Several watch components could be joined by means of laser beam micro welding. The width of the seam could be reduced to 100-200 μm. The joining geometries of an axis/wheel combination are in the range of 100 μm to 1mm diameter of the axis and about 200 μm wheel thickness. The process of laser beam micro welding could be integrated in a fully automated assembly machine for watch movement parts. This paper will give an overview about some results of a European research project where the welding of microparts was investigated. The aim was to decrease contamination and distortion of the parts during the welding process. The work to be presented has been funded by the European Commission in a project under the contract BRPR-CT-0634.
机译：激光原理的发明及其在钟表机芯上钻宝石的首次应用之后，激光仅用于打标。小型化和自动化的趋势仍在继续，这开辟了一个新的应用领域：激光束微焊接。本文概述了激光束焊接在钟表行业中的新应用。由于摩擦学方面的原因，手表机芯中经常需要将黄铜和不锈钢等异种材料组合在一起。在这里，激光束微焊接提供了传统连接技术（例如压配合或胶合）的替代方法。由于手表部件非常小，激光束的局部热量输入限制了焊缝宽度<200μm的可能性。使用脉冲Nd：YAG激光的脉冲形成能力，可以影响封闭焊缝的深度和宽度以及表面质量，特别是在焊缝末端。可以通过激光束微焊接将多个手表部件连接在一起。接缝的宽度可以减小到100-200μm。轴/轮组合的接合几何形状在轴直径为100μm至1mm的范围内，轮厚度约为200μm。激光束微焊接工艺可以集成到用于手表机芯零件的全自动组装机中。本文将概述欧洲一项研究微型零件焊接的研究项目的结果。目的是减少焊接过程中零件的污染和变形。待提交的工作由欧洲委员会根据BRPR-CT-0634合同在一个项目中资助。

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