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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture >Prediction of hole characteristics and hole productivity during pulsed Nd:YAG laser beam percussion drilling
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Prediction of hole characteristics and hole productivity during pulsed Nd:YAG laser beam percussion drilling

机译：脉冲Nd：YAG激光冲击钻孔过程中的孔特性和孔生产率的预测

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摘要

A thermal finite element model is proposed to simulate and predict hole taper (T_a), heat-affected zone and material removal rate during laser beam percussion drilling in two difficult-to-laser-drill materials having wide difference in their thermophysical and optical properties. The developed model incorporates temperature-dependent thermal properties, optical properties and phase change phenomena of the sheet materials to predict the hole profile through the isotherm generated along the depth of the hole due to repeated laser pulses. Hole characteristics and hole productivity parameters are compared for both the sheet materials. The predicted values of hole taper with respect to pulse width have been compared with the experimentally obtained values. It is observed that hole characteristics are mainly affected by pulse width in the Aluminium alloy sheet and pulse frequency in the Inconel sheet, whereas peak power has prominent effect on material removal rate for both the sheet materials.
机译：提出了一种热有限元模型，以模拟和预测两种在热物理和光学性质上有很大差异的难于激光钻孔的材料在激光束冲击钻孔过程中的锥度（T_a），热影响区和材料去除率。开发的模型结合了片材的随温度变化的热特性，光学特性和相变现象，以预测由于重复的激光脉冲而沿着孔深产生的等温线的孔轮廓。比较两种板材的孔特性和孔生产率参数。相对于脉冲宽度的孔锥度的预测值已经与实验获得的值进行了比较。可以看出，孔特性主要受铝合金板的脉冲宽度和因科镍合金板的脉冲频率的影响，而峰值功率对两种板材料的材料去除率都有显着影响。

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