Numerical simulation on laser bending of steel tubes
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摘要: 为了研究钢管激光弯曲过程,采用数值模拟的方法研究了激光弯曲钢管的温度场以及应力应变场的变化特点,分析了激光弯曲钢管的动态过程,解释了激光弯曲钢管过程中沿钢管壁厚各点的弹塑性变形的规律.结果表明,在给定技术参数下,激光扫描处横截面沿壁厚方向均产生压缩塑性变形,且下表面的压缩塑性应变比上表面要大,并解释了其机理.同时研究了激光工艺参数对弯曲成形角的影响,随着激光功率或激光扫描角度的增加,弯曲角度增加.Abstract: In order to explore process of laser bending steel tubes the temperature field and stress strain field are analysed with method of numerical simulation.Dynamic process of laser bending the steel tube is researched.The rule of elastic and plastic distortion at top,middle and bottom in tube thickness direction is analyzed.The results show that the compress plastic distortion is produced along tube thickness direction at section of laser scanning and compress plastic distortion of the bottom is greater than that of the top under giving technical parameter.The!effect of the laser parameter on the bending angle is researched.The bending angle can be increased along with increasing the laser power or scanning angle.
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Keywords:
- laser technique /
- laser bending /
- numerical simulation /
- stress and strain
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