抗热疲劳仿生耦合制动毂的激光加工参数

Laser processing parameter optimization and application of biomimetic coupling brake drum with high thermal fatigue resistance

通过正交试验设计,优化了Nd:YAG激光加工参数并进行了现场应用。结果表明,单元体横截面积随脉宽、峰值功率增加而增大,随扫描速度加快逐渐减小,频率和离焦量对单元体尺寸影响不显著;最佳激光加工参数为:峰值功率1.136 kW,脉宽12 ms,频率10 Hz,离焦量5.5 mm,扫描速度0.5 mm/s;经过激光仿生耦合处理的制动毂寿命延长1倍以上。

Through orthogonal test design, the processing parameters of optimized, and the engineering application was also performed. The results section area of unit increases with increasing the peak power and pulse width, accelerating the scanning rate. The frequency and the defocusing amount have Nd： YAG laser were indicate that the cross while it decreases with small effects on the size of units. The optimum laser processing parameters are 1. 136 kW peak power, 12 ms pulse width, 10 Hz frequency, 5. 5 mm defocusing amount and 0. 5 mm/s scanning rate. The service life of brake doubled through laser biomimetic coupling treatment under the given conditions.