Ultrasonic vibration auxiliary milling force modeling method based on finite element simulation

Abstract

The invention discloses an ultrasonic vibration auxiliary milling force modeling method based on finite element simulation, which takes tool parameters, cutting parameters and vibration parameters into account, and comprises the following steps: firstly, dispersing a blade into a series of infinitesimal elements along the axial direction, and calculating instantaneous cutting thicknesses of different cutting positions of the infinitesimal elements; then, using a response surface method for designing a simulation scheme about cutter parameters, cutting parameters and vibration parameters, performing a series of bevel angle cutting simulation through ABAQUS, extracting simulation cutting force, and obtaining a regression equation for calculating infinitesimal cutting force; and finally, calculating the cutting force of the infinitesimal at different cutting positions through a regression equation, and performing coordinate transformation and integral summation to obtain a predicted value of the ultrasonic vibration milling force in the milling process. The method can solve the problems that an existing modeling method is long in experimental period and high in experimental cost, and the applicability and reliability of the milling force model are improved.

Description

technical field [0001] The invention relates to an ultrasonic vibration-assisted milling force modeling method based on finite element simulation, which belongs to the field of metal processing. Background technique [0002] Milling is a conventional metal processing method, which is often used to process characteristic structures such as planes, bosses, and cavities. In the field of aviation manufacturing, high-strength, corrosion-resistant alloy materials such as titanium alloys are widely used as structural materials. However, during the milling process of titanium alloys, the tool wear is serious and the surface quality is poor, which restricts aviation technology to a certain extent. development of. Ultrasonic vibration-assisted cutting is a processing technology that applies high-frequency and low-amplitude vibration to the tool or workpiece for cutting. The introduction of ultrasonic vibration can achieve intermittent cutting, thereby obtaining better surface quality...

AI Technical Summary

Problems solved by technology

However, the 2D milling simulation is too simplified and the simulation is inaccurate, while the 3D milling simulation has the problems of complex models and high calculation costs

At present, for ultrasonic vibration assisted milling, no scholars have combined finite element simulation and traditional modeling, and the existing milling force models have great limitations

Images