| LIU Jie,JIAO Anyuan,ZHANG Jialong,MIAO Yongxin,HAN Bing.Process Study on Double-sided Magnetic Abrasive Finishing of TC4 Thin Plates Based on Asynchronous Rotation Magnetic Pole[J],53(10):196-206 |
| Process Study on Double-sided Magnetic Abrasive Finishing of TC4 Thin Plates Based on Asynchronous Rotation Magnetic Pole |
| Received:July 25, 2023 Revised:November 01, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.10.016 |
| KeyWord:titanium alloy double-sided MAF non-synchronous rotation material removal volume relative rotation speed difference |
| Author | Institution |
| LIU Jie |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
| JIAO Anyuan |
School of Applied Technology, University of Science and Technology Liaoning, Liaoning Anshan , China |
| ZHANG Jialong |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
| MIAO Yongxin |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
| HAN Bing |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
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| Abstract: |
| In order to enhance the processing efficiency and improve the surface morphology of TC4 thin plates processed by conventional magnetic abrasive finishing (MAF), a double-sided MAF device that generated a relative rotation speed difference with respect to the magnetic pole was designed to enhance its surface quality. Based on the asynchronous rotation on two sides of the relative magnetic pole, the two sides of the magnetic pole produced different speeds, so that it produced a relative rotation speed difference. The involute arrangement of magnets were chosen from two sides of the magnetic pole for the study. First of all, the magnetic abrasive was subject to a force and motion analysis to find out the factors affecting the efficiency of the processing and the processing effect. Then, the calculation and analysis of the principle of the removal of materials from the single magnetic abrasive were conducted. Using Maxwell software, the magnetic field gradient and magnetic induction intensity during asynchronous rotation were analyzed, and the simulation of the magnetic field was compared with the simulation of different relative rotation speed differences to obtain the best simulation results. The authenticity and reliability of this test was verified by the designed double-sided MAF device and processing device using different simulation parameters to grind both sides of the TC4 thin plate. Finally, the surface of the workpiece before and after grinding was observed and analyzed with a roughness meter and an ultra-depth-of-field 3D electron microscope. When the poles rotated synchronously, that was, when both poles rotated at 500 r/min, the average surface roughness Ra on the front side decreased from 0.47 μm to 0.2 μm with a decrease of 57%, and the average surface roughness Ra on the back side decreased from 0.46 μm to 0.21 μm, with a decrease of 54%, the material removal efficiency was lower. While the average surface roughness Ra of the front side decreased from 0.47 μm to 0.1 μm with a decrease of 78% when the poles rotated asynchronously, that was, when pole Ⅰ rotated at 500 r/min and pole Ⅱ rotated at 600 r/min, the average surface roughness Ra of the back side decreased from 0.48 μm to 0.1 μm with a decrease of 79%, and the average of the maximum height difference of the front side decreased from 62.5 μm to 10.4 μm with a decrease of 83%, and the average of the maximum height difference of the back side decreased from 63.2 μm to 10.3 μm with a decrease of 84%. The material removal efficiency was the highest, and the microscopic morphology of both sides of the workpiece was effectively improved, and the double-sided finishing method was conducive to efficiency. Asynchronous rotation of double-sided MAF produces a relatively uniform magnetic field. Changes in the moderate magnetic field can effectively promote the tumbling movement of the magnetic abrasive, accelerate the renewal of the cutting edge, and give full play the cutting ability of magnetic abrasive. The device can generate relatively high magnetic induction intensity when processing, and the magnetic field gradient changes moderately. It is conducive to enhancing the surface quality and improving the original defects on the surface of the workpiece. It improves the efficiency of grinding. |
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