| 简介 |
Apparatus and methods for multiple cut-off machining of rare earth magnet blocks are described. The cutting is by a plurality of abrasive blades (11) mounted coaxially on a rotating shaft. The rare earth magnet block (m) is fixed for cutting using a jig assembly comprising a pair of jig segments (31) which clamp the block. The jig segments have guide grooves (31a) on their surfaces, which restrict axial run-out of the cutting blades and also hold cutting fluid, which is entrained on the blade surfaces as they run through the guide grooves. Cutting fluid may be fed from a feed nozzle (2) having a plurality of slits (21) in which the edges of the respective blades are inserted. |
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