Research And Prediction Analysis Of Tool Wear Modeling Technology For Titanium Alloy Turning

Titanium alloys are receiving more and more attention due to their excellent ph ysical and mechanical properties.They are widely used in the aerospace industry to manufacture aircraft engines,airframes and various high-speed structural parts.They are called high-performance strategic metal materials.However,due to its small modulus of elasticity,low thermal conductivity and high chemical activity,it has becom e a typical difficult material to process.During the cutting process,the cutting area produces a high cutting temperature,resulting in low machining efficiency aed fast tool wear.Carbide tools are widely used in titanium alloy processing due to their excellent properties.However,the wear of cemented carbide tools is a prominent problend.Severe tool wear has a large impact on machining efficiency and quality,and there is currently no effective model and method for tool life prediction for titanium alloy machining.Therefore,the establishment of a model that can accurately predict the amount of tool wear and monitor the wear state of the tool has become a topic of concern in the field of titanium alloy processing research.In this paper,the TC4 of titanium alloy is used as an example to study the wear characteristics and laws of the tool under thermal coupling.The cutting principle and chip forming law in the cutting process are theoretically analyzed,and the wear form,wear process and wear mechanism of the tool are studied.The cemented carbide tool wear model under the action of single wear mechanism and comprehensive consideration of abrasive,bond and diffusion wear mechanisms was constructed,and the tool failure mechanism based on teamperature effect was revealed On this basis,the finite element software ABAQUS secondary development technology was used to predict the tool wear.The influence of cutting parameters on cutting force,cutting temperature and tool wear was analyzed,and the influence of tool wear on the cutting process was analyzed.The results show that the higher the cutting speed,the faster the tool wears,and the cutting speed has the greatest influence on the cutting temperature in the cutting amount parameter,while the back-feeding amount has the greatest influence on the cutting force,and as the tool wear increases,the cutting force,cutting temperature and residual stress on the workpiece surface also increase.The tungsten alloy test was carried out with a carbide tool.The wear of the tool rake face was observed and analyzed.The results show that the simulation results are basically in agreement with the test results,indicating that the tool wear model can be used to perform tool wear and Prediction of wear status.