Equipment Development And Process Research Of Ultrasonic Vibration Assisted Micro-Milling Of TC4 Titanium Alloy

In the current period,research in the fields of electronics,biology,communications,and aerospace is booming.As an important material in related fields,titanium alloy materials have a wide range of application prospects,especially the demand for miniature titanium alloy parts is challenging the current processing capabilities.As an efficient and flexible processing method,micro-milling has been applied to the processing of micro-components.However,the more traditional milling processing technology is often difficult to meet the requirements of the quality of parts in various fields.Therefore,the further development of the titanium alloy micro-processing technology Research is particularly important.The ultrasonic vibration assisted processing method is to add high-frequency ultrasonic signals to the traditional processing process.The ultrasonic transducer converts the ultrasonic electrical signals into mechanical vibrations and transmits them to the tool or workpiece to improve the processing process.In this paper,by studying the processing characteristics of TC4 titanium alloy material,the development of the micro-milling vibration auxiliary processing device is carried out,the finite element simulation tool is used to study the micro-milling processing process of TC4 material,and the experiment is designed to explore the effect of vibration milling processing parameters.The influence law of milling surface quality of titanium alloy material.First,an experimental device for surface milling of titanium alloy was built.According to the experimental processing requirements,the overall function system of the milling device was designed,and then the important components were selected and the key mechanical component sizes were designed.Based on this,the processing device was built,the control system was designed,and the performance was debugged.At the same time,it formulated a two-dimensional longitudinal bending ultrasonic vibration application program for milling tools,and participated in the production of a special vibration machining axis,its vibration mode was simulated and its vibration performance was tested,which provided a hardware basis for the titanium alloy milling experiment.Secondly,the finite element simulation study of ultrasonic vibration-assisted milling of titanium alloy was carried out.The tool motion trajectory of ultrasonic vibration-assisted milling was studied.Abaqus software was used to simulate the three-dimensional micro-milling process of ultrasonic vibration titanium alloy.Through the analysis of the milling simulation results under different vibration parameters,the effect of ultrasonic vibration on titanium alloy was explored.The influence of chip formation,cutting force change and surface roughness in the micro-milling process provides a certain theoretical reference for experimental research..Finally,an experimental study on ultrasonic vibration-assisted milling of titanium alloys was carried out.The slot milling experiment was carried out through a single-factor variable experimental design to explore the influence of titanium alloy milling spindle speed,feed rate and ultrasonic vibration amplitude on cutting force.Collect and compare and observe the top burr and milling with or without ultrasonic vibration.The size and shape of chips,it is found that ultrasonic vibration within a certain amplitude range has obvious effects on reducing cutting force,reducing burrs,and reducing tool wear.At the same time,a three-factor five-level experimental group was designed using the central compound method in the response surface experimental design.The white light interferometer was used to measure the surface roughness of the experimentally processed titanium alloy for statistical analysis and the roughness response regression model was constructed.Finally,the obtained regression was used.The model optimizes the milling processing parameters and carries out experimental verification.Finally,the best combination of machining parameters obtained is: spindle speed of 1889r/min,feed rate of 1.6?m/z,ultrasonic vibration amplitude of 4.4?m.According to these optimization parameters,the minimum surface roughness of titanium alloy slot milling is 0.177?m.