Process Analysis And Tool Structure Optimization Of Deep Hole Gun Drilling Based On DEFORM-3D

Nowadays,deep hole machining tools account for a large proportion of the tools required for processing and manufacturing in China.As an important part of deep hole processing,gun drilling has been widely used in many fields.Gun drills may have various problems such as overheating and poor chip removal during processing.These factors are important reasons of wear and tear of the gun drill.Therefore,research on gun drill design optimization method can effectively improve the tool stability and surface quality of the workpiece during deep hole machining,and realize the self-sufficiency of the manufacturing industry in China.Due to the special structure of the gun drill process,the wear and chipping of the tool are prone to occur.This topic is aimed at this problem.Solving this problem bases on analyzing the basic structural characteristics of the gun drill,the relationship between its geometric parameters and deeply studied of drilling ability.On the other hand,the mathematical model and simulation software are used to study the optimization design of gun drilling structure.Firstly,the plane flank double cooling hole gun drill is taken as an example.For the drilling process of the gun drill,the mathematical model of the drilling force and torque of the gun drill is solved according to the metal cutting principle and the unique structure of the gun drill.Secondly,through the mathematical model-the Matlab of the drilling force is analyzed and the drilling force and torque of the gun drill produced by a company were solved,and the outer corner,the inner corner,the outer blade first back angle,the inner blade back angle and the feed amount.The relationship between these five data and the values of drilling force and torque is analyzed,and the relationship between each parameter and the drilling torque is obtained intuitively.The multi-objective optimization method is used to solve the optimal gun drilling angle parameter.set.Again,SolidWorks is used to build 3D modeling of gun drills.The introduction of DEFORM-3D has made a reasonable setting of the parameters of the simulated cutting.Verify the feasibility of the optimization parameters by comparing the axial force,torque,temperature,wear amount,etc.of the actual simulation results of the gun drill after optimization of the unoptimized gun drilling structural parameters Data.Finally,for the unoptimized gun drill and the gun drill with optimized geometry parameters,the drilling experiment is carried out on the same deep hole machine by setting different cutting parameters,and the axial force and torque of the two sets of experiments are measured by the force tester.The instrument measures the amplitude of the drilling vibration.The optimization results of the gun drill are verified by comparing the axial force,torque and vibration of the two gun drills with the chip shape and wear after drilling.