Research On Friction And Tool-Wear Performance With Experiment Of Turning 316 Stainless Steel Based On Finite Element Technology

316 stainless steel has good mechanical properties and chemical properties,widely used in aviation,aerospace and other fields,but it is difficult to machining performance for severe hardening,cutting force,high cutting temperature,tool wear.What's more,chip is not easy to break and wound on the tool and workpiece.At present,the experimental research on the friction performance aimed at reducing the friction resistance between tool and chip and the experimental research on the wear performance aimed at reducing wear of the back tool surface VB_max,to a large extent,have been paid great attention and practice,but the simulation analysis of the friction and wear performance and the cooling method need to be further studied.In this paper,the friction and wear properties of cutting 316 stainless steel are studied based on the finite element technology.The influence of orthogonal cutting parameters on friction coefficient?between the tool and chip,the depth KT of the crescent depression on the front tool face and the wear on the back tool face VB_max is analyzed.The influence of high-pressure cooling lubrication on tool friction and wear properties is studied.(1)In this paper,the turning test method is used to study the friction performance of cutting tools by analyzing the cutting force in the process of cutting.The finite element software,Third Wave Advant Edge,is used to simulate the cutting process under different cutting parameters and different cutting environments to obtain the main cutting force and cutting depth resistance,calculate the friction coefficient?between the tool and chip,and then study the friction performance of the tool.(2)The influence of orthogonal cutting parameters on friction coefficient?between the tool and chip,the depth KT of the crescent depression on the front tool face,and the wear on the back tool face VB_max under the conditions of dry cutting and high-pressure cooling are compared and analyzed.Simulation results show:under the condition of the same cutting parameters,the friction coefficient?between the tools and chips decreases by 3%-11%in the cutting environment of high-pressure cooling(HPC 200 bar),compared with that of DRY cutting environment.The finite element software,Deform-3D,is used to simulate the cutting process under different cutting parameters and different cutting environments to study the influence of high-pressure cooling lubrication on tool wear performance.Simulation results show:under the same cutting parameters,the wear on the front tool face KT and the back tool face VB_max is reduced by 4%-45%and 6%-23%,respectively,compared with that in the cutting environment with DRY and high pressure cooling(HPC 200 bar).(3)The influence of cutting parameters on the friction and wear properties of the tool is studied by orthogonal experimental data processing method,the range analysis.When selecting the optimal combination of cutting parameters from the friction coefficient between tool and chip,the optimal combination of cutting parameters in DRY cutting environment is:cutting speed v_c(120m/min),feed f(0.2 mm/r),back feed a_p(1 mm).In the cutting environment with high pressure cooling(HPC 200 bar),the optimal parameter combination is selected as follows:cutting speed v_c(80 m/min),feed f(0.2 mm/r),back feed a_p(0.2 mm).When selecting the optimal combination of cutting parameters for the purpose of minimizing the wear on the later tool surface VB_max,in the DRY cutting environment,the optimal combination of cutting parameters is selected as follows:cutting speed v_c(80 m/min),feed f(0.15 mm/r),and back feed a_p(0.2 mm).In the cutting environment with high pressure cooling(HPC 200 bar),the optimal combination of parameters is selected as follows:cutting speed v_c(80 m/min),feed f(0.1 mm/r),back feed a_p(0.2 mm).(4)Finally,the dry friction performance of carbide turning tool for turning316 austenitic stainless steel in dry cutting environment is studied.The influence of cutting speed,feed and back feed on the friction coefficient?is studied by collecting the cutting force under the orthogonal cutting parameters and calculating the friction coefficient?between tool and chip.The experimental results are consistent with the simulation results,which verify the authenticity and reliability of the simulation.