| SUN Yan,PAN Ming-shi,WANG Jie,CHEN Yan.Technology of Grinding Complex Surfaces Obtained by Additive Manufacturing with Profiling Combined Magnetic Pole[J],52(6):361-368 |
| Technology of Grinding Complex Surfaces Obtained by Additive Manufacturing with Profiling Combined Magnetic Pole |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.06.032 |
| KeyWord:additive manufacturing magnetic particle grinding surface roughness profiling combined magnetic pole |
| Author | Institution |
| SUN Yan |
University of Science and Technology Liaoning, Liaoning Anshan , China |
| PAN Ming-shi |
University of Science and Technology Liaoning, Liaoning Anshan , China |
| WANG Jie |
Yantai Port Co., Ltd., and General Terminal Branch, Shandong Yantai , China |
| CHEN Yan |
University of Science and Technology Liaoning, Liaoning Anshan , China |
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| Abstract: |
| In order to improve the surface quality of parts and prolong their service life, it is necessary to grind and polish the surface of parts. Magnetic abrasive finishing is a branch of the new surface polishing technology in the finishing technology. Magnetic abrasive particles are added between the magnetic pole and the workpiece. Under the action of the magnetic field, the magnetic abrasive particles are arranged along the magnetic line of force to form a magnetic abrasive brush, which is attached to the workpiece surface under the action of the magnetic force. When there is a relative movement between the magnetic pole and the workpiece, the magnetic abrasive particles scratch along the workpiece surface to grind and polish the workpiece surface. The magnetic abrasive particles are attached, rolled and separated on the workpiece surface, which is not limited by the surface shape. It has good processing flexibility, adaptability, and a wide range of applications. In this paper, ANSYS Maxwell was used to simulate the distribution of magnetic induction intensity of the magnetic pole. When slots of different shapes were opened along the circumference of the disc-shaped axial magnetic pole, and to simulate the change curve of magnetic induction intensity at the same position when slots with different shapes were opened. The simulation results showed that when rectangular slots were evenly distributed along the circumference of the magnetic pole, the peak value of the magnetic induction intensity wave was the largest, the trough value was the smallest, and the gradient change of magnetic induction intensity was the largest, which was the most suitable for magnetic particle grinding of complex workpiece surfaces. The results showed that the magnetic induction intensity at the joint surface and edge of the combined magnetic pole was a little bigger than that at the same part of the overall magnetic pole, which was more suitable for the grinding of the groove surfaces. The setting of parameters such as magnetic abrasive particle size, magnetic pole speed and grinding gap would affect the grinding effect. The optimal process parameters obtained through simulation and experiment were:magnetic abrasive particle size of 180 μ m, magnetic pole speed of 1000 r/min, and grinding gap of 2mm. Taking the formed parts made of titanium alloy (Ti6Al4V) as an example, based on the magnetic abrasive polishing technology, the profiling combined the slotted magnetic pole was used to grind and polish the groove surface of the formed parts. The processing parameters were set as described above, and the surface roughness of the groove surface of the formed part was changed from the original 10.70 μm to 0.52 μm. And the surface defects were effectively removed. Therefore, the use of profiling combined slotted magnetic poles and the application of magnetic abrasive finishing technology can realize the grinding and polishing of the surface of complex parts made of additive materials. |
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