To provide a coolant feeding method for improving machining efficiency without degrading machining accuracy, and to provide a coolant feeder for use in the method.
The coolant feeder is formed of a grindstone 6 which is rotatably arranged and brings a rotatable outer peripheral surface thereof into sliding contact with a workpiece W to be ground to grind the same; a coolant ejecting means 13 for ejecting and feeding a coolant to the outer peripheral surface of the grindstone 6; and a shielding member 12 arranged on an upstream side in the rotating direction of the grindstone 6 with respect to a sliding contact portion 11 between the grindstone 6 and the workpiece W to be ground, for shielding an air layer rotating together with the grindstone 6, and inhibiting the air layer from infiltrating into the sliding contact portion 11. The coolant ejecting means 13 ejects the coolant to a gap between the shielding member 12 and the sliding contact portion 11 along the rotating direction of the grindstone 6, and feeds the coolant to the outer peripheral surface of the grindstone 6. The coolant ejecting means 13 ejects the coolant at an ejection speed exceeding a circumferential speed of the grindstone 6. Further the coolant ejecting means 13 is integrally formed together with the shielding member 12.
NARUSAKI YUUJI
OKAYASU MASAKAZU
Takehiro Chiba