激光入射角对修整圆柱形CBN砂轮影响

激光入射角是激光修整圆柱砂轮的重要参数之一,它不仅影响光束入射能量密度,而且影响激光修整砂轮的尺寸精度与质量.介绍了采用N d:YAG激光器修整陶瓷CBN砂轮的新方法.根据光束的几何光学原理,采用建模与试验方法研究了入射角、临界角对激光修整小CBN砂轮的影响.考查了入射角不同引起热传导的差异,导致激光修整材料去除量的不同.进而通过调整入射角,优化选择激光能量密度,达到有效修整砂轮的目的.对入射角和临界角的建模与试验分析有助于深入了解激光修整砂轮机理.用SEM显微观察激光修整砂轮的微观状态表明研究结果可靠.

Effect of incident angle on laser processing of a small vitrified CBN grinding wheel

Laser incident angle is one of very important processing parameters on cylindrical surface,which affects not only the incident density of laser beam,but also the laser processing dimensional accuracy and quality.A new method to process grinding wheels using Nd:YAG laser is presented.Based on the principle of geometric optical,both modeling and experimental studies were conducted to investigate the effects of incident angle and critical angle on truing and dressing properties in laser processing a small vitrified CBN grinding wheel.The main difference in heat conductivity generated with incident angle was examined which produces laser processing amounts of materials removed quite differently.The effective truing was achieved by optimal selection of suitable laser power density through adjusting an incident angle.In addition,the underlying mechanism of laser truing and dressing process was investigated by means of modeling and experimental analysis of incident angle,critical angle and microscope structural characteristic(with SEM) that were shown to be reasonable.