Study On The Mechanism And Parameter Optimization Of Grinding And Cutting Austenitic Stainless Steel With Thin Slice Grinding Wheel

China’s automobile production and sales have been the first in the world for many years in a row,and is the world’s number one producer of automobiles.Investment mold precision casting is used in a large number of applications in the automotive industry for the production of spare parts due to its more accurate dimensions and low surface roughness,which allows the production of castings with a clean surface and a more complex structure.The continued rapid development of the automotive industry has brought new development requirements to domestic precision casting enterprises engaged in the production of automotive parts.The removal of the casting gate is an essential post-treatment process in the entire investment casting production process.Many small and medium-sized enterprises currently use a high-speed rotating flake grinding wheel to deeply grind the workpiece material to realize the process of material cutting,which belongs to grinding and cutting.Stainless steel materials with its good corrosion resistance in the automotive industry is more widely used,but austenitic stainless steel materials in the grinding and cutting process there is a high processing temperature,material thermal softening phenomenon is obvious and material surface burns and other problems,so that after the end of grinding and cutting the surface quality of the workpiece becomes poor,the loss of thin grinding wheels serious.Therefore,it is of practical significance to explore the process of grinding and cutting austenitic stainless steel workpieces with thin-slice grinding wheels.First,according to the production practice to determine the grinding angle,linear speed and feed rate as the key process parameters affecting the grinding and cutting of stainless steel workpieces with a thin grinding wheel.Establish a geometric model of the grinding and cutting process,and analyze in detail the changes in the machining process after changing the grinding and cutting angle.Derive the mathematical theoretical model of the physical quantities of the grinding and cutting geometry,and study the processing mechanism of the grinding and cutting process.Next,finite element simulation software is used to construct a geometric model of the workpiece being ground and cut by a thin-slice grinding wheel.Setting the material of the flake grinding wheel and the workpiece according to the actual working conditions,adding interaction relations and constraints.Simulate the grinding and cutting process under different grinding and cutting angles,and compare and analyze the results after the simulation is completed.Select the appropriate processing equipment,according to the requirements of grinding and cutting processing conditions for the design of clamping and fixing modifications,build grinding and cutting austenitic stainless steel workpiece of the experimental platform.A detailed experimental protocol was developed according to the research objectives,and the effect of varying the grinding and cutting process parameters on the grinding and cutting process was investigated through single-factor experiments,respectively.Finally,a central combination experiment was conducted to consider the combined effect of the three grinding and cutting process parameters on the grinding and cutting effect.A multi-objective optimization of the grinding force and surface roughness of the workpiece was carried out using the response surface method for significance analysis to obtain a relatively optimal combination of grinding and cutting process parameters according to the production requirements.