| 主权项 |
1. A cutter assembly comprising:
a back plate adapted to be mounted on a machine spindle, said back plate having a stepped portion having an outer circumference and including a plurality of circular sectors and locating surfaces at predetermined locations on the outer circumference, the back plate further including a drive tenon extending radially outward from the outer circumference of the stepped portion and at least one fastening member extending in a longitudinal direction; and a cutter ring adapted to be mounted on the outer circumference of the stepped portion of the back plate, the cutter ring including a plurality of bayonet slots adapted to receive the at least one fastening member of said back plate when mounting the cutter ring onto the back plate, and a plurality of tenon slots adapted to receive the drive tenon of said back plate when mounting the cutter ring onto the back plate, wherein a clearance, B, is created between the back plate and the cutter ring when mounting and dismounting the cutter ring onto the back plate, and wherein one of the locating surfaces of said back plate provides localized contact between the back plate and the cutter ring when the cutter ring is mounted onto the back plate in a working position to minimize radial run out; and wherein the drive tenon contacts a wall of one of plurality of tenon slots when the cutter ring is mounted onto the back plate in the working position to transmit torque from the back plate to the cutter ring. |
