Patent ID: 9566681
Date: 2017-02-14
CPC Classifications: B23Q,F04B,F04C

Claim:
1. A coolant supply device comprising: a pump that supplies a coolant to a tool; a measurement device that measures a discharge pressure of the pump; and a control device, wherein the control device has a function for determining a pump discharge flow rate by a rotation rate of the pump and a pump discharge pressure measured by a pump discharge pressure measurement device, a function for determining a coolant flow path diameter of the tool by the determined pump discharge flow rate, a function for determining a target value of a pump discharge pressure at a time of boring performed by the tool, by the determined coolant flow path diameter of the tool, a function for increasing or decreasing the rotation rate of the pump by comparing the target value of the determined pump discharge pressure with a measurement value measured by a pump discharge pressure measurement device, and a function for determining whether or not boring by the tool is completed, based on the measured pump discharge pressure, wherein the control device has a function for determining a coolant flow path diameter of the tool and a target value of a pump discharge pressure at a time of boring performed by the tool, after no-load running of the tool is completed, at a stage prior to boring performed on a work by the tool.