Research On The Law Of Spindle Barrel Finishing Process And The Process Plan Of Uniformity And Consistency

The barrel finishing processing technology was widely used to improve the surface quality and surface integrity of various parts due to its advantages of green,environmental protection,high efficiency,and strong adaptability.Among them,during the spindle barrel finishing process,the workpiece is in a non-free state,which can realize the finishing of the surface of the shaft and disk parts,and effectively avoid mutual bumps and scratches between the workpieces.The proposal of the discrete element method and the development of discrete element simulation software had realized the visualization of the motion state and trajectory between discrete element particles in various engineering problems.This subject combines the characteristics of the spindle barrel finishing process,and uses EDEM simulation software to carry out a basic simulation of the spindle barrel finishing process.And taking into account the actual working conditions of the solid-liquid two-phase flow,the EDEM-Fluent coupling simulation method is adopted.Taking the contact force and collision contact speed between barrel finishing medium and the workpiece as the evaluation index,explore the law of the effect of barrel finishing medium on the workpiece.Combining the wear depth of the workpiece surface and the accumulated contact energy between barrel finishing medium and the workpiece,the amount of material removal on the workpiece surface during the spindle barrel finishing process is explored,so as to provide a reference for the development of the barrel finishing process.First of all,for the two different processing methods of the parallel-spindle barrel finishing process,EDEM simulation software is used to simulate the two processes.EDEM simulation software is used for basic simulation,combining with the velocity vector analysis of the barrel finishing medium during processing,the collision contact force,collision contact velocity and collision contact between the barrel finishing medium and the workpiece when the workpiece is in different clamping positions under different processing methods frequency.At the same time,the coordinates of the surface barrel finishing medium along the x-axis and z-axis are extracted and fitted,and the influence of the radial distance on the surface barrel finishing medium ’s fitting trajectory function is analyzed.Explore the law of interaction between the barrel finishing medium and the workpiece.Taking into account that the actual processing conditions are carried out in a bath environment,in order to realize the simulation of the spindle barrel finishing process in this environment,the two-way coupling effect of the barrel finishing medium and the liquid medium is combined.Using EDEM-Fluent co-simulation,the solid-liquid two-phase flow mixing model in the drum is established by Euler-Euler method,and the contact force and contact speed between barrel finishing medium and the workpiece are explored.Combining with the discussion of the motion trajectory of individual barrel finishing medium,the group of barrel finishing medium and the overall processing medium,the essence of the interaction between the barrel finishing medium and the workpiece during the processing is analyzed.And through comparison of simulation simulation and experimental testing of the contact force between the tumble polishing block and the workpiece under dry and bath conditions,further analyze the law of interaction between the barrel finishing medium and the workpiece to provide guidance for practical engineering applications.In order to improve the unevenness of the workpiece along the axial direction,combine the law of interaction between the barrel finishing medium and the workpiece,a machining process plan in which the workpiece is placed obliquely is proposed.The surface wear depth of the workpiece and the accumulated contact energy between the workpiece and barrel finishing medium are used to characterize the amount of material removal on the workpiece surface.Based on the Archard Wear wear model in the EDEM software,the study of the wear depth and the cumulative contact energy along the axial distance from the bottom of the cylinder and along the radial distance.Taking the coefficient of variation of the wear depth of the workpiece surface under different processing plans as the evaluation index,explore the plan to improve the surface uniformity of the workpiece.And combined with the experimental test to compare and analyze the coefficient of variation of the material removal at different clamping positions along the axial direction of the workpiece vertically and obliquely.Verify the effectiveness of the processing plan for the tilted placement of the workpiece.