Experimental And Simulation Study On High Speed Cutting Nickel-Based High Temperature Alloy Under Steam Fog Cooling

Aviation industry is a national strategic industry.In 2015,the state put forward the plan of "Made in China 2025".Aviation industry is one of the top ten industries.The main core of aviation industry is the production and manufacture of aeroengine.Many alloy parts of aeroengine are made of nickel-based superalloy materials.However,nickel-based superalloy is a typical hard-to-machine material,which has low processing efficiency,short tool life and high processing cost,which largely restricts the development of aviation industry.In order to improve the cutting performance of GH4169 nickel-base superalloy,cutting heat is reduced,tool life is prolonged and machined surface quality is improved under normal temperature.Specific research contents are as follows:Firstly,according to the vapor-cooling principle,the UG three-dimensional software is used to establish the three-dimensional model of vapor-foam cooling,and the three-dimensional model of the established model is divided by ANSYS-ICEM fluid software,and then the ANSYS-Fluent fluid solver software is used for steam according to actual working conditions.During the fog cooling process,the physics field of heat exchange temperature field and velocity field is simulated.The temperature near the chip is used to solve the vapor cooling coefficient,and this parameter is brought into Deform-3D for simulation of cutting finite element simulation.Secondly,using Deform simulation software to simulate the cutting process,design a single factor test to change the three elements of cutting(cutting speed,feed rate,depth of cut),and analyze the temperature distribution and variation of the tip region during the addition of steam mist parameters and dry cutting.The influence of cutting three factors on the tip temperature and chip,and studying the influence of cutting three elements on cutting force.Thirdly,through the single factor test of designing ceramic inserts,the effects of cutting parameters on cutting force,machined surface quality and chip shape were studied.The optimal cutting parameters were obtained by orthogonal test and the cutting parameters were analyzed to influence the cutting force and the processed surface quality.The primary and secondary times;the life formula is inferred by the step turning test and the blade life curve is drawn;the finite element simulation error and the test error of the ceramic blade are analyzed to verify the correctness of the finite element simulation model.Finally,the study of the influence of the hardness of the cutting edge and the radius of the machined surface on the cutting edge and the surface quality of the machined surface is optimized.The tool life curve under steam cooling and dry cutting is compared.Comparing the energy spectrum analysis of the dry cutting and vaporcooling cutting blade,exploring the diffusion of the blade under the GH4169 vaporcooling condition;also studying the cutting material selection of the cutting parameters,the cutting force,the processed surface quality,the tool wear form,The effect of chip shape.This article is to use steam mist cooling to safely and efficiently cut hightemperature alloy under normal temperature conditions,which provides a theoretical basis for the large-scale promotion of vapor-cooling technology in factories.