Numerical Simulation And Experimental Research On Ultrasonic Vibration Aided End Surface Grinding TC4

With the development of aviation industry and the wide application of titanium alloy materials in aviation field,how to obtain a better quality titanium alloy machining surface is a key problem that needs to be solved urgently at present.Common surface machining processes,micro grinding compared to cutting and milling,easier access to high quality machined surfaces,however,due to poor processing of titanium alloy material,ordinary grinding is difficult to guarantee its quality requirements.Ultrasonic assisted micro grinding as a new finishing technology,it has a prominent advantage in the processing of difficult processing materials such as plasticity,not only is it cost-effective,high-quality,and highly efficient,but it also has processing effects that are unmatched by ordinary grinding.Compared with ordinary grinding,ultrasonic assisted grinding has obvious advantages in reducing grinding force,improving grinding environment,delaying grinding wheel wear,and improving the surface quality of workpieces.In this paper,ultrasonic assisted face micro-grinding technology for titanium alloy TC4 material,theoretical analysis of the kinematics and dynamics characteristics of abrasive particles in the process of axial grinding,three-dimensional simulation of Micro-Grinding by finite element method and establishment of experiment platform,comparison and analysis of characteristics of ultrasonic grinding with or without,experimental study of grinding characteristics varying with machining parameters.Through simulation and experiment,the following conclusions are drawn:1)As can be seen by simulation,during ultrasonic assisted grinding,a single abrasive particle was severely impacted,the degree of plastic deformation of materials is obviously reduced,and regularly deposited on the surface,grinding force is significantly reduced,the stress strain phenomenon is significantly weakened.2)It can be known through experiments,under the same grinding conditions,ultrasonic-assisted grinding grinding force is smaller than ordinary grinding grinding force.Within a certain range of grinding depth,ultrasonic grinding grinding force increases with increased feed speed,on the contrary,when this range is exceeded,grinding force first decreases and then increases.Other grinding conditions remain unchanged,grinding force decreases with increasing amplitude,on the contrary,it tends to increase.3)Ordinary grinding of TC4 titanium alloys has irregularly shaped sliding markson the surface,obvious material remnant plastic bulge between slides,accompanied by different degrees of scratch on the surface of the workpiece.Ultrasonic assisted grinding,the surface of the workpiece presents an apparently equally spaced jump-like approximation of the impact roll-slip,and the slip features short and wide morphological features,there is no obvious plastic uplift between the slides.Smoother workpieces by ultrasonic assisted grinding.4)According to the experimental study,during ultrasonic assisted grinding,other process parameters have been set,with the increase of amplitude,the surface roughness gradually increases,when the amplitude is close to the grinding depth,surface roughness reaches maximum.