Numerical Analysis of the Effects of Pulsed Laser Spot Heating Parameters on Brazing of Diamond Tools

摘要

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 Δ T are addressed. The primary factor affecting T max , Δ 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 Δ 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.