Force Model and Verification of Magnetic Traction Nanolubricant Grinding

doi:10.3901/JME.2024.09.323

Abstract

Abstract: Grinding is an indispensable method to obtain high surface quality and machining precision of difficult-to-machine materials in aerospace field. Especially for high efficiency grinding characterized by large contact length has been widely used in aerospace field. However, the lubricant traction energy is insufficient in workpiece/abrasive interface, which leads to poor cooling lubrication and infiltration performance, and deterioration of workpiece surface integrity. Based on this, a new magnetic traction nanolubricant grinding is proposed. However, the micro-interface transport mechanics of magnetic nanolubricant under the magnetic field is not clear, and the grinding force model with the influence of magnetic field has not been established. Firstly, the mechanical law of magnetic traction lubricant transport in grinding zone is revealed, and the model of lubricant infiltration velocity and flow rate with the influence of magnetic field is established. Secondly, a grinding wheel model is established based on the truncated hexahedron abrasive, which revealed the interference mechanical behavior of materials for a single abrasive and established the mechanical model. Finally, a grinding force model of magnetic traction nanolubricant is established for titanium alloy grinding and verified by experiments. The results show that the introduction of magnetic field can significantly increase the wetting speed and flow rate of lubricant. When the magnetic field intensity is 5×10⁵ A/m, the normal and tangential grinding forces decrease by 31.8% and 74.3%, respectively, compared with no magnetic field. And the minimum mean deviation of tangential and normal grinding force is 9.2% and 5.7%, respective. A theoretical basis for magnetic traction nanolubricant grinding and technical support for high surface integrity requirements of large contact length grinding of difficult materials were provided.

Key words: grinding, magnetic nanolubricant, magnetic traction, dynamics behavior, mechanical model

CLC Number:

TG580
TH161

CUI Xin, LI Changhe, ZHANG Yanbin, YANG Min, ZHOU Zongming, LIU Bo, WANG Chunjin. Force Model and Verification of Magnetic Traction Nanolubricant Grinding[J]. Journal of Mechanical Engineering, 2024, 60(9): 323-337.

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