Study On Surface Texture Formation Mechanism Of 304 Stainless Steelby In Axial Ultrasonic Vibration-assisted Grinding

Due to the limitations of traditional processing technology,it is difficult to deal with the traditional processing methods for new materials,difficult to process materials,easy to deform materials,etc.With the development of science and technology,it is difficult for the traditional processing methods to meet the current requirements of surface quality and surface accuracy for 45 steel,titanium alloy and other commonly used materials.Ultrasonic vibration assisted grinding is widely used in workpiece surface forming and material removal due to its characteristics of reducing grinding force,reducing surface temperature and improving surface quality.Therefore,ultrasonic vibration assisted grinding has a wide application prospect.Ultrasound vibration assisted grinding,as a new modern processing technology,has developed rapidly in recent years.Because ultrasonic vibration processing has incomparable advantages compared with other processing methods,colleges and universities have invested a lot in the research of ultrasonic vibration.This paper summarizes and analyses the research results of the previous scholars in the field of ultrasonic vibration,choosing stainless steel 304 as the research object,and puts forward new ideas for the research of ultrasonic vibration-assisted grinding.The main points of this paper are as follows:(1)The design and finite element analysis of the ultrasonic horn are carried out,and the accuracy of the design and simulation analysis is verified by the measuring device.(2)Analyzing and calculating the movement of a single abrasive particle,using MATLAB software to simulate the trajectory of a single abrasive particle,and analyzing the influence of the variation of grinding parameters and ultrasonic vibration parameters on the trajectory of the abrasive particle.(3)The three-dimensional simulation model of single abrasive cutting is established,and the influence of single abrasive cutting on surface quality is compared and analyzed with or without ultrasonic vibration.(4)Study the surface texture morphology under multi-abrasive grinding,and analyze the influence of the change of grinding parameters and ultrasonic vibration parameters on the surface texture morphology.(5)Design an axially ultrasonic vibration-assisted grinding table,and verify the accuracy of theoretical analysis through experimental research.According to the key points of the above research,the important achievements of this paper are as follows:(1)The ultrasonic horn and tool head which meet the test conditions are designed.(2)The change of grinding depth has the greatest influence on the trajectory of a single abrasive,and the change of workpiece feed speed has the least influence on the trajectory of a single abrasive.(3)After loading the ultrasonic vibration,the single abrasive cutting can obtain better surface quality and improve the stress concentration in the cutting process.(4)Compared with non-vibration grinding,loading ultrasonic vibration grinding can obtain better surface texture morphology.Moreover,the larger the grinding parameters and ultrasonic vibration parameters,the better the surface texture can be obtained.(5)The accuracy of theoretical analysis in this paper is verified by the experimental study of axial ultrasonic vibration-assisted grinding,which provides a new idea for the study of surface texture.The research on single abrasive,multi-abrasive and test will provide a new idea and method for the research of ultrasonic vibration assisted grinding.