Finite Element Simulation Of Micro Cutting High Temperature Alloy GH4169 And Experimental Reasearch

Micro milling is one of the most potential micro processing technology, because it has a unique advantage in the process of micro complex three-dimensional st-ructure, and can achieve high and processing efficiency.High temperature alloy has excellent high temperature strength, creep resistance and corrosion resistance,so it is an ideal material for the manufacture of micro high temperature components.How-ever, due to its high strength,poor thermal conductivity and poor cutting performance, it is a typical materials difficult to process.At present, the micro milling mechanism of nickle based high temperature alloy is still not clear.In the process of micro milling of nickel base alloy, the cutter tooth is easy to break, the cutting e-dge wear is serious, and it is difficult to obtain high quality machining surface so It is of great significance to study the milling forces for the cutting mechanism, t-he optimization of milling parameters, tool wear and so on.In this paper,nickel based high temperature GH4169 was studied.Through the finite element method and the experimental method, the variation law of milling force and surface roughness with different milling parameters was studied.The minimum cutting thickness is very important for the selection of milling parameters.In this paper, orthogonal cutting simulation was carried out using ABAQUS finite element software,the simulation results show that the minimum cutting thickness is 0.4 times the radius of the cutting edge.The cutting thickness range of the cutting force size effect is obtained by the analysis of the orthogonal cutting force.In order to study the influence of milling parameters on milling force, the finite element model of micro milling is established.The orthogonal experiment was designed and the milling force results were analyzed,and obtained the influence curve of the spindle speed, feed per tooth and back engagement on cutting force.In addit-ion, micro milling experiment was carried out, and the milling force was measure-d and compared with the simulation experiment, which verified the correctness of the simulation.The orthogonal experiments were carried out to measure the roughness of the milling surface.Through analyze the data of surface roughness and obtained the influence law of spindle speed, each tooth feed rate and back engagement on surface roughness.