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.