Research On Prediction And Optimization Method Of Cutting Temperature And Cutting Force In Gear Skiving

Gear skiving is a new kind of green manufacturing technology for gears with high efficiency and precision.With the development of some key technologies-machine tool stiffness,computer numerical control,material coating technology,etc.,gear skiving has gradually shown great potential and been paid more and more attention.In the gear cutting process,cutting temperature and cutting force have an important impact on tool life,machining quality,residual stress,etc.,which can reflect the cutting performance of gear skiving.However,the difficulties to research cutting temperature are relied on the uneven distribution and the complexity of the gear skiving process in actual production,and the challenges for accurate measurement and prediction of the cutting force are also posed by the vibration and deformation of machine tools and tool wear.In order to overcome these problems,the influences of process parameters on cutting temperature and cutting force in gear skiving are analyzed,cutting temperature and cutting force are predicted,and then,the combination of process parameters is optimized,which can provide references for improving the machining efficiency and quality and prolonging tool life in gear skiving.The specific content is as follows:Firstly,the kinematic principle of the gear skiving is illustrated,and the mathematical model of basic generating flank and rake face is established on the basis of the design parameters of the gear skiving tool,and then the parametric models of the cutting edge of the gear skiving tool and its surface are carried out;the geometric solid models and simplified models of the gear skiving tool and the gear to be cut are constructed respectively.Secondly,the simulation analysis method of gear skiving process is proposed,aiming at specific material properties for the workpiece,the constitutive model is selected,the fracture criterion is determined,the friction characteristic is clarified,and the meshing and assembly of models of the tool and workpiece are completed;the reliability of the finite element model is verified by comparing with the results of simulation and actual machining,supporting for the study of cutting temperature and cutting force in gear skiving.Then,the change trend of cutting temperature during gear skiving process is analyzed,the prediction model of cutting temperature of gear skiving is established,and the influences of single process parameter and multiple process parameters on cutting temperature is investigated in depth;a optimization method of process parameters with the highest machining efficiency as the goal under the cutting temperature constraint is proposed,and the validity of the prediction model is verified;for the problem of tool life reduction caused by uneven distribution of cutting temperature,the influences of process parameters on the uniformity of cutting temperature distribution is researched.Finally,the change trend of the three-coordinate component of cutting force in the process of gear skiving was analyzed,the prediction model of the three-dimensional cutting force in gear skiving process was constructed,and the influences of single process parameter and multiple process parameters on the three-dimensional cutting force was studied in depth;a process parameter optimization method with the main cutting force as the constraint and the highest machining efficiency as the goal was proposed,and the validity of the prediction model was verified.