| YANG Zi-yu,JIAO An-yuan,DING Hao-dong,HAN Bing.Experimental Study on Improving Grinding Burrs Effect by Magnetic Abrasive Finishing Using Magnetic Pole with Involute Grooves[J],52(4):329-337 |
| Experimental Study on Improving Grinding Burrs Effect by Magnetic Abrasive Finishing Using Magnetic Pole with Involute Grooves |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.029 |
| KeyWord:magnetic abrasive finishing magnetic pole nickel-based superalloy hole burr removal involute grooves |
| Author | Institution |
| YANG Zi-yu |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
| JIAO An-yuan |
School of Applied Technology, University of Science and Technology Liaoning, Liaoning Anshan , China |
| DING Hao-dong |
School of Mechanical Engineering and Automation,Liaoning Anshan , China |
| HAN Bing |
School of Applied Technology, University of Science and Technology Liaoning, Liaoning Anshan , China |
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| Abstract: |
| There are many deficiencies for burrs removal in the traditional method by magnetic abrasive finishing, such as the small change rate of magnetic induction intensity in the grinding area, the splash and serious loss of magnetic abrasives. The work aims to design the magnetic pole of involute groove based on the involute principle, optimize the magnetic field distribution, and rotate the magnetic pole against the involute expansion direction, to improve the efficiency and quality of burrs removal. The grinding area of the involute groove pole was compared with that of the traditional unslotted pole. The effective area of the unslotted pole accounted for about 60.7%, and the effective area of the involute groove pole accounted for more than 90%. Magnetic field simulation of magnetic poles with involute groove for three different base circle diameters:4, 8 and 24 mm was carried out. A radial reference line with length of 50 mm was drawn at 2 mm above the magnetic pole model, and the variation law of magnetic induction intensity was analyzed and compared. Compared with other magnetic poles, the magnetic field distribution of the involute groove pole with a base circle of 8 mm was more uniform and the magnetic induction intensity gradient changed more greatly. Therefore, the magnetic pole of this specification was selected for subsequent experiments. Using response surface method (RSM), an experimental study on the burrs removal by magnetic abrasive finishing on the helical-milling holes of nickel-based superalloy GH3128 plate was carried out. The effects of spindle speed, abrasives filling amount and average abrasives size on the finishing effect were analyzed, and the optimum combination of process parameters were selected. It was verified by experiments that the average height of the cutting burrs decreased from the original 29.6 μm to 10.2 μm, and the average width of the burrs decreased from the original 288.6 μm to 169.4 μm after 18 min grinding for holes in nickel-based superalloy GH3128 plate by involute groove pole with base circle diameter of 8 mm at spindle speed of 1 600 r/min, average abrasives size of 250 μm, feed speed of 0.05 mm/s, filling amount of magnetic abrasives of 30 g and machining gap of 2 mm. The results show that the magnetic pole with involute groove can improve the change rate of magnetic induction intensity, suppresses the splash loss of magnetic abrasives, accelerate the cutting edge renewal of abrasives, and improve the grinding efficiency and uniformity. In addition, the machining plan can provide reference for the removal of other types of burrs. |
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