Laser drilling in rare-earth magnets

GuoZhong Zhang; Li Min Liu; Changjiang Li

doi:10.1117/12.253137

30 September 1996 Laser drilling in rare-earth magnets

GuoZhong Zhang, Li Min Liu, Changjiang Li

Proceedings Volume 2888, Laser Processing of Materials and Industrial Applications; (1996) https://doi.org/10.1117/12.253137
Event: Photonics China '96, 1996, Beijing, China

Abstract

A Nd/YAG pulse laser is used to drill in Sm-Co and Nd-Fe-B permanent magnetic rotor. The experimental studies and analysis on the morphology and the phase composition of the drilled rotor are described. In the center of the drilled rotor, there is a hole which diameter is equal roughly to the girdle size of the Gauss laser beam. The hole wall is rapid fused amorphous matter, which morphology and composition are obviously different from that before hole drilling. The grain in heat-affected zone fined, but the composition has not changed. The experimental results show that the reasonable selection of laser parameters according to physical properties of materials is necessary in order to improve product quality and production efficiency and that the lower laser power, the narrower pulse and the multiple- drilling and advantageous to the processing for hard-brittle materials as rare-earth magnets.

Citation Download Citation

GuoZhong Zhang, Li Min Liu, and Changjiang Li "Laser drilling in rare-earth magnets", Proc. SPIE 2888, Laser Processing of Materials and Industrial Applications, (30 September 1996); https://doi.org/10.1117/12.253137

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