基于Nd: YAG固体激光器预制连杆初始裂解槽研究

裂解槽的设计与加工是连杆裂解加工技术的核心和技术关键，将直接影响着连杆的裂解质量。为提高连杆裂解槽加工质量，采用Nd：YAG固体激光器对两种类型的连杆进行了裂解槽激光加工试验，分析了不同切割参数对裂解槽质量的影响，并对激光切割参数进行了优化。结果表明：激光峰值功率、离焦量、切割速度、脉冲频率、辅助气体压力、激光入射角等对裂解槽的加工质量都有很大的影响，其中激光峰值功率直接影响着裂解槽的加工深度，在切割速度与脉冲频率比值约为1：3以及非正离焦量状态下所加工的裂解槽对连杆的裂解都非常有利。

Research on Connecting-rod Initial Splitting Notch Based on Nd: YAG Solid Laser

As the key technology and core process of connecting-rod fracture-splitting, the design and processing of the splitting slot influence the fracture-splitting quality of the connecting-rod. In order to improve the quality of connecting-rod splitting notch, the author tested splitting notch laser processing on two kinds of connecting rod by applying Nd：YAG solid laser and analyzed the influence of different cutting parameters on quality as well as optimizing the cutting parameters of laser. The result showed that laser peak value power, clearance between focus and plate, cutting speed, impulse frequency, assistant air pressure, angle of laser incidence had great influence on processing quality of splitting notch. The peak power of laser as the main factor influences the depth of splitting slot. The ratio between cutting speed and impulse frequency is 1:3 and in the condition of minus clearance between focus and plate, splitting notch processed does good to splitting of connecting rod.