Experimental Investigation on the Machinability Improvement in Magnetic-Field-Assisted Turning of Single-Crystal Copper

• Published in: Micromachines (Basel) Vol. 13; no. 12; p. 2147
• Main Authors: Wu, Xian, Zhou, Yu, Fang, Congfu, Zhu, Laifa, Jiang, Feng, Sun, Ke, Li, Yuan, Lin, Yiyang
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 04.12.2022; MDPI
• Subjects: chip morphology; Coefficient of friction; Comparative analysis; Compression ratio; Cutting force; Cutting parameters; Cutting tools; Diamond machining; Experiments; Friction; Friction reduction; Lorentz force; Machinability; Machining; magnetic field; Magnetic fields; magnetoplasticity effect; Mechanical properties; Morphology; Nonferrous metal industry; Precision machining; Single crystals; single-point diamond turning; Surface properties; Tribology; Turning (machining); chip morphology; magnetic field; Lorentz force; magnetoplasticity effect; single-point diamond turning
• ISSN: 2072-666X; 2072-666X
• DOI: 10.3390/mi13122147

The single-point diamond-turning operation is a commonly used method for ultra-precision machining of various non-ferrous materials. In this paper, a magnetic field was introduced into a single-point diamond-turning system, and magnetic-field-assisted turning experiments were carried out. The results revealed that the magnetic field affects the metal-cutting process in the form of the cutting force, chip morphology, and surface quality. Compared with traditional turning, magnetic-field assisted turning increases the cutting force by 1.6 times, because of the additional induced Lorentz force, and reduces the cutting-force ratio and friction coefficient on the rake surface by 16%, with the improved tribological property of the tool/chip contact-interface. The chip morphology in the magnetic-field-assisted turning shows the smaller chip-compression ratio and the continuous side-morphology. With the magnetoplasticity effect of the metal material and the friction reduction, magnetic-field-assisted turning is helpful for improving metal machinability and achieving better surface-quality.