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激光清洗在再制造行业、微机电系统(MEMS)和超精密加工行业具有重要的应用前景。采用低频YAG脉冲激光器对FV520B基体的表面漆层进行激光除漆实验和机理研究。实验结果表明,激光除漆机制因实验条件的改变而不同。当吹氩气时,激光除漆机制主要是烧蚀效应;当采用约束层水时,激光除漆机制主要是烧蚀效应和振动效应,而且约束层水不但能提高表面漆层的去除率还能极大地提高基体的临界损伤阈值。同时实验验证了理论计算得到的搭接率的除漆效果,即在激光扫描速度为249mm/min、扫描道间的搭接量为0.6mm时,实现了整个漆层的完全去除,激光除漆效率达15.5mm2/s。
Laser cleaning has important applications in the remanufacturing industry, micro-electromechanical systems (MEMS) and ultra-precision machining. Low-frequency YAG pulsed lasers were used to laser-remove paint the surface of FV520B substrate. The experimental results show that the mechanism of laser paint removal varies with experimental conditions. When argon gas is blown, the mechanism of laser paint removal is mainly the ablation effect. When constrained layer water is used, the laser paint removal mechanism is mainly the ablation effect and vibration effect, and the constrained layer water can not only improve the removal rate of the surface paint layer Can greatly improve the critical damage threshold of the matrix. At the same time, the experimental results show that the lapping efficiency of the lapping rate obtained by the theoretical calculation is achieved. That is to say, the lacquer removal effect is achieved completely when the laser scanning speed is 249 mm / min and the overlap between scan channels is 0.6 mm. Efficiency up to 15.5mm2 / s.