Drilling Processing Simulation And Experimental Research Of High Strength Steel

There are many problems in the process of cutting high strength steel,such as chip breaking difficulty,cutting temperature too high and per unit area's cutting force on appear is large.The traditional cutting test method is time-consuming,inefficient and predictive of cutting is not strong.In view of the above problems,the machining simulation technology of high strength steel process is studied in this paper,and the experimental research is carried out.The main contents of the paper include the following aspects.Firstly,In order to solve those above problems,this paper established the model of twist drill by using SolidWorks,and use DEFORM-3D software simulated the simulation test table,which using the two-factor non-repetitive test designed.Analyzes some problems encountered in the simulation process,and proposes corresponding solutions to these problems.Get some drilling simulation results under different feed rates in high-strength steel like axial force,torque,and drilling temperature.The simulation of the specific data derived,the relevant block filtering to eliminate large error points.Get the corresponding simulation experimental data and present it as a table.An analysis of variance it also named variation analysis,it was used to analyze the axial force,torque and temperature affected by the cutting parameters.Secondly,The quadratic non-linear fitting formula is combined with the corresponding empirical formula as the optimization objective and the multi-objective optimization method is adopted.The Pareto Optimal Solution Set for Drilling is obtained by combining the Genetic Algorithm Toolbox in MATLAB with the related program segments to optimize the machining parameters.Based on the Pareto optimal solution set table,some optimized cutting parameters were drilled.Secondly,the variance analysis method,that is the variance analysis to analyze the axial force,torque and temperature affected by cutting parameters.The simulated data sheet is imported into Design expert software to study the regression relationship between simulation test indices and experimental factors and to simply analyze the response surface generated by the experimental factors with interaction.Through analysis of the drilling parameters and the response relationship with the way of secondary nonlinear fitting,obtain the functional relationship between the drilling axial force,torque and cutting parameters.This provides a reference for further optimizing the processing parameters.Finally,In this paper,the finite element method is used to analyze the drilling process,and the cutting parameters of the carbide twist drill when drilling AISI4340 are obtained.And to prove that the simulation results to replace part of the processing experiment to optimize the processing parameters have some basis and accuracy.By this method,the research cycle can be effectively shortened,and the resources can be saved and the accurate and reliable machining parameters can be obtained.The optimized processing parameters can provide valuable reference for the craft personnel to study the high-strength steel drilling process and improve the processing technology,and have certain guiding value for the practice.