Parameter Design And Mechanism Study Of Micro-textile Cutting Tools For Cutting Nickel-Based Superalloys

Nickel-based superalloy materials are widely used in aviation manufacturing today because of their high temperature mechanical properties and chemical stability,however,the strength is high and the cutting performance is poor.Therefore,problems such as high cutting temperature,large cutting force,and severe blade wear occur during the machining process.In this paper,based on the research theory of bionic tribology,the micro-texture blade with good anti-wear performance is designed and used for the cutting of nickel-base superalloy.The following research is carried out on the micro-textile parameter design,wear-reducing mechanism and processing of the blade.Firstly,by analyzing the micro-texture mechanism of the tool,it is found that the micro-texture needs to be placed in the contact and friction area of the chip,and the micro-texture design is carried out to determine the two forms of micro-texture-micro-grooves and micro-pits.The range of texture geometric parameters is determined;The laser processing micro-texture process is selected and microtextured samples are processed.The texture quality was checked and prepared for the subsequent cutting of the nickel-base superalloy GH4169.Then,The GH4169 cutting experiment was carried out.Firstly,the cutting was performed with different cutting parameters by ordinary blades.The degree of influence of the cutting three factors on the cutting force was determined by the range analysis.Based on this,the experimental cutting parameters of the microtextured tool were selected and carried out.The mathematical model of the relationship between the cutting force index of the micro-textured blade was established by combining the metal cutting theory with the orthogonal experiment.The multi-objective parameter optimization was carried out with the cutting force and the flank wear of the blade as the target,and the genetic algorithm was used to linearly weight.The method solves and finally determines the optimized microtexture geometry parameters.Finally,Further research on wear and life was carried out with the optimized micro-textured blade;continuous wear experiments were carried out using different blades,and the cutting force of the micro-textured blade and the ordinary blade was observed,and the micro-texture was explored by comparing and analyzing the change of the cutting force value.The degree of wear of the rake face and the amount of flank wear of the micro-blade and the ordinary blade are compared,and the influence of the micro-texture geometry parameters on the blade wear under continuous cutting conditions is revealed;In the blade life test,it is determined The theoretical basis of blade life measurement,quantitatively analyze the influence of micro-texture on blade life by determining the T-v relationship between microtexture and common tool;and under the condition of vapor-cooling,explore the blade of micro-texture under lubricated cutting conditions.Degree of grinding to determine the lubrication performance of micro-textured tools.his paper combines theory and experiment to provide reference and new development direction for the future development of blades.