Key Process Parameters And Finite Element Simulation Of Laser Quenching Of Short Cycloidal Roller And Rack

This project is aimed at the engineering requirements of precision machine tools and other precision mechanical equipment for high-precision,low-vibration,zero-backlash transmission.The target is laser quenching of the short-side cycloidal rack and pinion,around the laser quenching scanning method and after quenching.The surface effects and other issues were studied.The ANSYS thermodynamic simulation of the short-side cycloidal rack tooth surface laser quenching was carried out,and the key parameters affecting the tooth surface laser quenching were analyzed.It provides a technical basis for laser quenching of precision rack and pinion,and also provides relevant reference for the development of other special heat treatment technologies,and has good engineering and technical value.Firstly,the basic principle of short cycloidal roller rack drive is summarized and the relevant design parameters are formulated.The tooth profile of the short cycloidal roller rack is analyzed and the corresponding theoretical tooth profile and actual tooth profile are analyzed.The tooth profile pressure angle of the short cycloidal roller rack and the deformed profile pressure angle were modeled and analyzed.The meshing force and contact stress during the transmission process were analyzed,and the rack design was established.The linkage relationship between the surface contact fatigue strength and the tooth surface hardness requirement provides theoretical and model support for the subsequent process planning and related parameter influence analysis of the short-spindle roller rack tooth surface laser quenching,and It provides a basis for verifying the rationality and feasibility of tooth surface laser quenching.Then,the basic principles and characteristics of laser quenching and the general process and basic requirements of laser quenching process planning are introduced.The tooth profile normal angle and profile critical angle appearing during laser quenching are modeled and analyzed in detail.The feasibility and rationality of laser scanning in the direction of tooth direction and in the direction of tooth width;the power density of laser quenching was modeled and the influence of relevant design parameters on power density was analyzed,and the finite element simulation of laser quenching was carried out in the next chapter.A basic plan is provided.Then,the thermodynamic simulation of the short cycloidal roller rack is carried out,and the simulation results are analyzed in depth.The "TimeHist PostPro" post-processing display of ANSYS shows the temperature change of each node withtime and the heat source center.The temperature variation of each node extending longitudinally with time.Finally,based on the finite element model in the previous paper,three key parameters of power P,incident angle and scanning speed are selected,and the four key tooth positions of the tooth top,and the root are respectively used to make 60 different groups by finite element method.The thermodynamic simulation of parameters and position obtained the temperature field distribution state and the influence of key parameters of laser quenching of short cycloidal roller rack.