COOLING DEVICE AND COOLING METHOD OF MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To provide a cooling device and a cooling method of a machine tool that can be easily applied to a general purpose machine tool and prevent reduction of processing accuracy caused by chips generated during processing, and that improve a tool life and processing accuracy by efficiently cooling a processing tool and a processing point.SOLUTION: A cooling device includes: a coolant tank 20 which stores a coolant; a supply pipe 22 which is connected to the coolant tank 20 and serves as a supply flow channel 21 of the coolant; a spray nozzle 23 which is connected to an end part of the supply pipe 22 to spray the coolant fed from the coolant tank 20; and an air mixer 24 which is disposed between the coolant tank 20 and the spray nozzle 23 and mixtures air into the coolant fed under pressure inside the supply pipe 22 by jetting air through a plurality of nozzle holes 27a and 27a etc. opened into the supply flow channel 21. The coolant into which air is mixed by the air mixer 24 is sprayed through the spray nozzle 23 toward a processing tool 14 and a processing point P in ambient air.