| 摘要: |
| 激光深熔焊接由于其无与伦比的优良特性成为高功率激光工业应用的主要方面。在假设小孔为旋转抛物面结构的基础上,通过分析小孔内的压力平衡、蒸发压力、表面张力、能量平衡、小孔壁的温度以及小孔底部的能量平衡问题,采用数值迭代方法求解出小孔的深度和宽度。将焊接中的理论分析由假设小孔形状为圆柱面只能适合低速焊接推广到中高速焊接。计算了在不同焊接速度下小孔的深度、宽度以及与焊接试验的焊缝深度,与焊接试验中得到的结果进行了比较,理论计算结果也比较吻合实际焊接情况。 |
| 关键词: 激光深熔焊接 小孔 熔池 旋转抛物面 数学模型 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(60407009);北京市自然科学基金资助项目(4042007);科技部国际合作项目(2002AADF3101);北京市科技新星计划项目 |
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| Numerical simulation and experiment study on keyhole in laser penetration welding |
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WANG Zhi-yong, CHU Xin-jun, CHEN Hong, ZUO Tie-chuan
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Laser Insitituty, Beijing University of Technology, Beijing 100022, China
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| Abstract: |
| Energy balance,pressure balance and temperature of keyhole were analyzed based on the assumption that the keyhole is a Paraboloid of revolution.The keyhole depth and width were calculated by numerical iterative method.The calculated results accord with those of the actual experiments.Then the keyhole principle fitted for low speed laser welding on the assumption that the keyhole with cylinder was developed to a high speed. |
| Key words: laser deep penetration welding keyhole welding pool revolution paraboloid mathernatical model |
