The Research Of Difficult-to-machining Materials Chip Deformation And Chip Simulation In High-Speed Cutting

With a large number of applications of the difficult-to-machining materials in aerospace, automotive, weapon industry and die industry, high surface quality, high efficiency and high precision have become new goals pursued by manufacturing technology, especially the difficult-to-machining materials machining. Obviously average measures of improving difficult processing characteristics of difficult-to-machining materials are no longer able to meet these requirements. The development of high-speed cutting technology makes the settlement of these issues such as chip control become possibility.Firstly, this paper discusses the change characteristics in three stages of chip outflow, curling and breaking, A set of mathematical model pertinent to chip geometry and space trajectories is summed up through studying of chip space trajectories, analyzing current mathematical formula pertinent to the chip shape and movement. The model based on the actual cutting parameters and tool parameters calculates the chip geometry parameters and space trajectories parameters, providing the powerful support for difficult-to-machine materials chip simulation.Secondly, based on the high-speed cutting experiment of difficult-to-machining materials, this paper discusses the effect of cutting three elements on the deformation of the chip. The experiment researches the effects showed through the change of chip deformation coefficient of each cutting element on the trend of chip deformation through single-factor method. Experiment shows that cutting speed has a greater impact on chip deformation, and cutting feed rate is also significantly affected except cutting depth.Finally, the simulation applications through callback OpenGL in the VC++6.0 environment is developed with the high-speed cutting of difficult-to-machining materials and mathematical model of the chip trajectory in this paper. The application has a good human-machine interface to calculate chip geometry parameters and space trajectories parameters driving it to generate chip through input actual cutting parameters and tools geometry parameters. The application visualizes trend of chip deformation under different conditions. In the last part, this paper obtains a group of different chip shape corresponding to cutting speed trend of change that, and the chip deformation trend of change consistent with actual chip deformation trend of change observed in experiment.