Mechanism Analysis And Parameter Optimization Of Barrel Finishing Based On EDEM

As a typical free abrasive finishing method, surface barrel finishing has good processing effects, such as high processing efficiency, low cost, low environmental pollution, simple equipment. It has been widely used on parts of surface finishing, deburring, rounding, deflashing. Research has been focused only on process test all this time, lack of awareness of processing mechanism, which has become the developing bottleneck of surface barrel finishing technology. To further understand surface barrel finishing, the key is to study the role of abrasive for part in finishing process. As the movement of abrasive is freedom and without rules, it is difficult to analyze finishing mechanism by conventional methods. Discrete element method is used to study the motion of particle system, what is widespread concern and application methods of scholars both at home and abroad in recent years. As an advanced three-dimensional discrete element analysis software, EDEM software has capable of real-time dynamic simulating the particle system movement, and it can well solve the current problems existing in surface barrel finishing. EDEM is applied to surface barrel finishing analysis at the first time in the paper. In order to visually simulate the movement process of particle system inside the workbin and reveal its finishing mechanism deeply, crankshaft barrel finishing dynamic model is built by using EDEM. Vertical centrifugal barrel finishing dynamic model is built, and the factors that affect processing efficiency are optimized. Compared with experimental results, the correctness that EDEM is used to analyze barrel finishing surface is verified. The main contents are as follows:1. Crankshaft barrel finishing dynamic model is built by using three-dimensional software EDEM. By analyzing particle position, velocity in the processing and particle contact force of the crankshaft, the relation between different locations particle velocity distribution within the same cycle systems and the processing effect is discussed, the law that average speed of particle system changes with the processing time is analyzed, and contact force between particle system and crankshaft is studied.2. The dynamic model of vertical centrifugal barrel finishing is built, and the movement of particle system within the cylinder is simulated through EDEM software. Particle system velocity distribution and the average energy of particles in contact with parts in different parameters (revolution speed, media load capacity and abrasive particle size) are got, and the influence of various parameters for vertical centrifugal barrel finishing efficiency is studied. 3. The influence of revolution speed, load capacity and size of the abrasive media for vertical centrifugal barrel finishing efficiency is studied through the experiments, and the experimental results are consistent with the simulation results, which verifies the correctness and effectiveness of simulating barrel finishing through EDEM.The effect that abrasive particles act on parts in crankshaft barrel finishing is studied from microscopic point in the paper, and the vertical centrifugal barrel finishing parameters are optimized, and the correctness that EDEM is applied to barrel finishing techniques is verified. These studies lay the foundation for future research on surface finishing by using EDEM and should be of great significance for the further development and industrial applications of surface barrel finishing.