| ZHANG Xiang,MA Xiao-gang,HAN Bing.Magnetic Particle Grinding Test of Permeable Bushing Based on Irrational Rotational Speed Ratio[J],51(12):269-276 |
| Magnetic Particle Grinding Test of Permeable Bushing Based on Irrational Rotational Speed Ratio |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.12.027 |
| KeyWord:irrational number speed ratio rational speed ratio grinding trajectory magnetic abrasive grinding response surface method magnetic bushing |
| Author | Institution |
| ZHANG Xiang |
School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Liaoning Anshan , China |
| MA Xiao-gang |
School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Liaoning Anshan , China |
| HAN Bing |
School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Liaoning Anshan , China |
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| Abstract: |
| The work aims to solve the problems of difficult processing and low processing efficiency encountered in the precision grinding process of the inner surface of large magnetic conductive parts. The inner surface was ground with magnetic particles by the rotating magnetic pole method. The workpiece was driven to rotate by the spindle of the lathe, and the magnetic pole extended into the workpiece and fed back and forth with the lathe tool rest while driven by the motor to rotate. The magnetic abrasive particles filled between the magnetic pole and the inner surface of the workpiece were driven to rub the workpiece surface to complete the finishing process of the inner surface. ADAMS software was used to simulate the grinding trajectory under rational and irrational speed ratios. The effects of different rational and irrational speed ratios on grinding trajectory and workpiece surface quality were discussed respectively. The main process parameters (workpiece speed, magnetic pole speed and magnetic particle size) affecting the grinding were optimized by response surface method. The surface morphology and surface roughness data were analyzed by grinding test to verify the reliability of the optimized process parameters. From the response surface analysis, when the workpiece speed was 98 r/min, the magnetic pole speed was 2 435 r/min, the magnetic particle size was 190 μm, and the magnetic particle grinding time was 40 min, the workpiece surface roughness decreased greatly, and the surface roughness decreased from Ra 3.32 μm to Ra 0.198 μm. The surface roughness improvement rate (ΔRa) was 94.04%. The surface defects such as scratches and processing textures on the workpiece surface after grinding under irrational speed ratio were effectively removed, and the processed surface was brighter and more uniform, which could greatly improve the service life of the workpiece. When the ratio of the magnetic pole speed to the workpiece speed is a rational integer, the grinding effect is the best, the interference effect of grinding trajectory is better, the number of interlacing times per unit area is more, the interwoven mesh is more uniform and dense, and the area of unprocessed area is smaller. Response surface method can be used to optimize the mathematical modeling design of the test results, and the best combination of process parameters can improve the processing efficiency and surface quality of large-scale magnetically conductive shaft bushing parts. |
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