Study On The Passivation Of Abrasive Particles To Cemented Carbide End Mills

Tool is the most basic and most critical parts in mechanical processing,known as the teeth of the machine.The quality of the tool affects the processing quality and efficiency directly,with the development of cutting towards high speed,high precision and ultra-precision direction,the tool is given more and more important position.Tool edge preparation can improve tool life,processed surface quality and cutting process stability.In this paper,the tool edge preparation process based on dispersed solid abrasive particles is analyzed by discrete element software EDEM,the mathematical model of the edge radius of the tool edge is established.Discrete element software and fluid calculation software edem-fluent were used to analyze the tool edge preparation process based on gas-solid two-phase abrasive flow.This paper based on the basic theory of discrete element,using the Hertz-Mindlin no slip and Hertz-Mindlin with Archard Wear particle contact model,through discrete element software EDEM and analyses the influence of dispersed solid abrasive tool edge preparaton process,the time,tool rotation speed ratio,the types of abrasive,abrasive grinding and cutting tool rotation on the dispersion of solid particles motion state,the influence of the blade Wear edge accumulated energy and quantity.Secondly,based on the theory of abrasive wear and the principle of energy conservation,the mathematical model of material removal on the cutting edge surface by single abrasive was established,the mathematical model of the edge radius of the cutting edge was established,and the feasibility of the mathematical model was verified by comparing it with the experiment value.Finally,based on the gas phase turbulence model Standard k-? two-equation model and Gidaspow gas-solid drag model,a model of tool edge preparation by gas-solid two-phase abrasive flow was established by coupling discrete element software and fluid calculation software.The effects of preparation time,abrasive particle size,wind speed,abrasive layer height and tool speed on abrasive flow state,force and wear were studied by single factor and orthogonal simulation.The research in this paper provides a basis for revealing the mechanism of tool edge preparation by abrasive and lays a foundation for further development of tool edge preparation.