Grinding cup and wear part with vibration dampening means

Details Grinding cup and wear part with vibration dampening means Grinding cup and wear part with vibration dampening means

B - Operations, Transporting

24

B

B24B 3/33 (2006.01) B24B 7/00 (2006.01) B24D 7/00 (2006.01)

Patent

CA 2218163

The present invention relates to a grinding cup (10) and a wear part (12) for grinding of cutting inserts of a rock drill bit. The grinding cup (10) is provided to be rotatably mounted in a grinding machine. The grinding cup (10) is provided to perform grinding of cutting inserts of a rock drill bit, said grinding cup comprising a shank (11), a flush channel (18) and a wear part (12), having a recess (15). The grinding cup has a center axis (14) and is provided with vibration dampening means (23). The wear part (12) is resilient in the grinding cup in at least the axial direction relative to the shank (11) and the vibration dampening means (23) forms contact surfaces (24, 26) with cooperating parts, said contact surfaces having substantially the same radial extension.

L'invention porte sur une meule-boisseau (10) et une pièce d'usure (12) servant à rectifier les plaquettes de coupe d'un trépan. La meule-boisseau (10) est conçue pour être montée sur un axe rotatif dans une rectifieuse. La meule-boisseau (10) sert à rectifier les plaquettes de coupe d'un trépan, et se compose d'une tige (11), d'un canal de rinçage (18) et d'une pièce d'usure (12) présentant un évidement (15). La meule-boisseau possède un axe central (14) et est munie d'un dispositif d'amortissement des vibrations (23). La pièce d'usure (12) est diposée de manière flexible dans la meule-boisseau au moins en direction axiale par rapport à la tige (11) et le dispositif d'amortissement des vibrations (23) forme des surfaces de contact (24, 26) avec des pièces coopérantes, lesdites surfaces ayant pratiquement le même prolongement radial.

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