Device Development And Experimental Study Of Stainless Steel Microtexture Manufacturing By Ultrasonic Impact

The rapid development of modern industrial fields has put forward higher requirements on the performance of stainless steel.In recent years,the use of surface manufacturing microtexture methods to improve the functionality of stainless steel has become an important technical application.Ultrasonic impact technology is a surface strengthening treatment technology that has great advantages in improving the surface stress state and material organization form.On this basis,by controlling its processing accuracy and corresponding process parameters,ultrasonic impact technology is expected to become a low-cost and high-precision manufacturing technology for surface microtexture,broadening the practical industrial applications of stainless steel.At present,there is no work report on directly manufacturing the microtexture of stainless steel surface by ultrasonic impact,so this paper will explore the feasibility of using ultrasonic impact technology to manufacture the microtexture of the stainless steel surface to improve its functionality,which is of great significance for low-cost high-precision realization of stainless steel functional enhancement.The specific research work of this paper is as follows:In order to understand the basic principle of ultrasonic impact manufacturing of stainless steel microtexture,the finite element simulation method was used to analyze the ultrasonic impact machining process.Different from traditional machining methods,ultrasonic impact machining is a chipless machining method,the material forms the desired structure on the surface in the form of plastic flow.The finite element simulation software ABAQUS was used to simulate the ultrasonic impact machining of the stainless steel surface microstructure process,and the deformation process and stress were analyzed.According to the basic principle of ultrasonic impact machining,the overall scheme of the functional system of the ultrasonic impact machining device is determined.This paper focuses on the selection of important components of the ultrasonic impact processing system,motion control system,and force detection system of the ultrasonic impact machining device.According to the influence of factors such as the size and displacement stroke of the selected components,the preliminary model of the mechanical structure of the ultrasonic impact processing device is determined.This paper focuses on the structural design of the gantry,tool fixture,and workpiece fixture of the ultrasonic impact processing device,and uses the finite element simulation software ANSYS workbench to analyze the deformation and stress of the structure.According to the design scheme of functional system and mechanical structure,an ultrasonic impact machining experimental prototype was set up,and the microtexture of 316 L stainless steel surface was manufactured by the device.Use laser confocal microscope,metallographic microscope,surface roughness meter,super-eye digital microscope,white light interferometer,friction and wear testing machine and scanning electron microscope to test the surface morphology and the friction and wear performance of the experimental samples,and compared with the microtexture samples manufactured by elliptical vibration diamond cutting.