Simulation On Deburring Of Ultrasonic Machining Based On Particle Collision

The milling burr generated on the surface of parts during machining is an important factor affecting the quality of parts.In view of the processing quality,deburring is an essential process to improve the working life and ensure the service performance of parts.As the development of ultrasonic machining technology,it has been widely used in the field of metal machining and has continuously expanded the machining processes.Ultrasonic machining technology has broad development prospects in the deburring field due to its high processing precision and efficiency.However,there is still a lack of systematic understanding of the ultrasonic deburring mechanisms.During milling processes,the workpiece material is subjected to severe plastic deformation,and the machined surface is likely to generate burrs.In order to obtain good surface quality and service performance,deburring process is usually adopted.In this paper,the burr morphology and formation mechanism were statistically analyzed.The finite element method was used to simulate the impact process of abrasives on milling burr during ultrasonic deburring.The burr removal mechanism was studied,and the ultrasonic abrasives parameters were optimized.This paper laid the necessary theoretical foundation of the practical application of ultrasonic deburring.The main contents of this paper are as follows:(1)Milling experiments of 2A12 aluminum alloy were carried out.The morphology of burrs were observed,and the size of burrs was analyzed to study the burr formation mechanism.According to the experimental results,the target of ultrasonic deburring was determined as the milling exit burrs.(2)Analyze the principle of deburring by ultrasonic machining and the motion law of single abrasive particles,and introduce the composition of ultrasonic processing system,and the factors affecting the ultrasonic deburring efficiency including the type,shape and size of abrasives were analyzed.(3)Explain in detail the relevant content of ABAQUS and related theories of finite element analysis.The plastic deformation of exit burr were simulated.By analyzing the fracture and removal process of exit burr and the principle of ultrasonic deburring.(4)The finite simulation model of the deburring process by multiple abrasives was established,and the collision process of abrasives on burrs was simulated.The influences of abrasive velocity,abrasive type,abrasive shape,abrasive size and suspension concentration of the burr was analyzed.Analysis of burr equivalent stress,strain and strain energy changes.The abrasive impact processing parameters were optimized,and the optimum suspension concentration is obtained.