Numerical Analysis of the Effects of Pulsed Laser Spot Heating Parameters on Brazing of Diamond Tools
Numerical Analysis of the Effects of Pulsed Laser Spot Heating Parameters on Brazing of Diamond Tools
复制标题
脉冲激光点加热参数对金刚石工具钎焊影响的数值分析
DOI：
10.3390/met9050612
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发表时间：
2019-05-01
期刊：
影响因子：
2.9
通讯作者：
Cui, Changcai
中科院分区：
文献类型：
--
作者：
Wang, Yangguang;Huang, Guoqin;Cui, Changcai
建立了三维有限元模型，对脉冲激光点加热钎焊金刚石过程中加热参数对温度的影响进行了数值分析。脉冲Nd：YAG激光器用于实验验证。结果表明，在激光加热过程中，由于脉冲热流的作用，温度呈周期性变化。提出了最高温度Tmax、最低温度Tmin、平均温度Tav和温度波动幅度Δ T四个关键的热指标。影响Tmax、Delta T和T-av的主要因素是脉冲功率，影响T-min的主要因素是脉冲频率。T-max、T-av和Δ T的次要影响因素是脉冲宽度，T-min的次要影响因素是脉冲功率。从工程实际出发，提出了设计加热参数的顺序为：脉冲功率、秒频、末宽。
A 3D finite element (FE) model is built to numerically analyze heating parameters on temperature during brazing diamond grains by the pulsed laser spot heating. A pulsed Nd:YAG laser is used for experimental validation. The results show that during laser heating, the temperature varies periodically because of the pulsed heat flux. Four key thermal indices, the maximum temperature T-max, the minimum temperature T-min, the average temperature T-av and the temperature fluctuation amplitude Delta T are addressed. The primary factor affecting T-max, Delta T and T-av is the pulse power and on T-min is the pulse frequency. The secondary effect factor on T-max, T-av and Delta T is the pulse width and on T-min is the pulse power. For engineering practice, the order of designing heating parameters is recommended as: pulse power, second frequency and last width.