| 摘要 |
PURPOSE:To obtain efficient boring by grinding in a boring method and apparatus for boring by a grindstone by facing the axis of the grindstone eccentrically to the axis of a work for making the axis of the grindstone cut into axially via coolant. CONSTITUTION:A work W is fast fixed on a hollow work shaft by a chucking mechanism, and then, a grindstone wheel 18 fixed on a grindstone shaft faced to the work W is positioned to be eccentric (e) in its axis to the axis of the grindstone wheel 18. The work shaft 3 is rotated in a low speed, the grindstone wheel is rotated in a high speed, and a table is fed in a low speed in the direction of the grindstone wheel 18 for cutting in. Coolant is supplied to the grinding part through a penetration hole 18'' in the center of the grindstone wheel, and discharged from a groove 18' at the top of the grindstone wheel for grinding. |
