| ZHANG Bo,LI Fuzhu,GUO Yuqin,WANG Yun,SHEN Kunlun,DI Zhicheng.Advances in Magnetic Abrasive Machining Technique for the Inner Surface of the Small Holes[J],53(6):28-44 |
| Advances in Magnetic Abrasive Machining Technique for the Inner Surface of the Small Holes |
| Received:March 24, 2023 Revised:August 30, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.06.003 |
| KeyWord:inner surface of the small holes magnetic abrasive machining material removal mechanism material removal model |
| Author | Institution |
| ZHANG Bo |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
| LI Fuzhu |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
| GUO Yuqin |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
| WANG Yun |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
| SHEN Kunlun |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
| DI Zhicheng |
School of Mechanical Engineering, Jiangsu University, Jiangsu Zhenjiang , China |
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| Abstract: |
| Inner surface finishing of the small holes has become an enormous technical problem in the field of advanced manufacturing. Magnetic abrasive machining (MAM) as an important finishing technique can improve the surface quality of the small holes due to its significant advantages of flexible contact, good adaptability, and no temperature compensation. In this work, the basic principle, material removal mechanism, and material removal model of MAM are summarized. MAM can be divided into traditional magnetic abrasive machining techniques and composite magnetic abrasive machining techniques according to the development process. Traditional magnetic abrasive machining techniques mainly include magnetic abrasive grinding (MAG) technique, magnetic needle abrasive grinding (MNAG) technique, and fluid magnetic abrasive (FMA) technique. Composite magnetic grinding techniques include ultrasonic-assisted magnetic grinding (UAMG) technique and electrolytic magnetic composite grinding (EMCG) technique. MAG is the most basic technique for finishing the inner surface of the small holes. It uses the interaction between the magnetic field and magnetic abrasive particles to achieve the finishing of the workpiece surface. Due to the different positions of magnetic poles, MAG has two forms of external magnetic pole grinding (EMPG) and built-in magnetic pole grinding (BMPG). In the process of MAG, processing efficiency can be improved by increasing the grinding pressure. MNAG drives the magnetic needle to collide, scratch, and roll to remove the edges, burrs, and recast layers on the inner surface of the small holes. However, due to the effect of the magnetic needle shape, there will be a processing blind area. FMA is a novel type of precision finishing technique based on the theory of magnetic phase transition. Under the action of the magnetic field, the liquid abrasive composed of magnetic particles and abrasive particles changes from free-flowing Newtonian liquid to consolidated Bingham body. As the liquid abrasive contacts with the workpiece and generates relative motion, the finishing of the workpiece surface is realized. UAMG has high processing efficiency, but it has the limitation of being impossible to predict the motion trajectory and grinding path of abrasive particles. EMCG has the advantage of not being limited by the hardness of the material, low abrasive wear, high controllability, and high machining efficiency. However, it is only used for conductive materials. When MAM is used to finish the inner surface of the small holes, the material types are different, so the removal mechanism is also different. The removal mechanism of hard and brittle materials can be divided into brittle fracture removal, plastic deformation removal, and powdered removal. The removal mechanism of plastic materials can be divided into three stages:sliding friction stage, ploughing stage, and material removal stage. The material removal model in MAM can be divided into single magnetic abrasive material removal model and 'magnetic brush' material removal model. However, these models have certain limitations. A perfect material removal model should be further constructed and the mechanism of MAM should be further studied. Finally, suggestions and prospects for future research and development of MAM are given. |
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