Coolant supply device

Abstract

In a coolant supply device that supplies a coolant for washing chips into a machine tool, an opening/closing valve that is opened or closed by the pressure of the coolant is provided in the course of a pipe line supplying the coolant ejected from a coolant ejection pump into the machine tool. Meanwhile, an ON/OFF control is performed so that the coolant ejection pump is turned off when a first time elapses after the coolant ejection pump is turned on and the coolant ejection pump is turned on when a second time elapses after the coolant ejection pump is turned off.

1 . A coolant supply device that supplies a coolant for washing chips into a machine tool, the coolant supply device comprising:
 a coolant tank that stores the coolant;   a coolant ejection pump that suctions the coolant from the coolant tank and ejects the coolant;   a pipe line that leads the coolant ejected from the coolant ejection pump into the machine tool and discharges the coolant into the machine tool;   an opening/closing valve that is provided in the course of the pipe line and is opened or closed by the pressure of the coolant; and   a pump control unit that controls turning on/off of the coolant ejection pump based on time.   
     
     
         2 . The coolant supply device according to  claim 1 ,
 wherein the pump control unit is configured to control turning on/off of the coolant ejection pump so that the coolant ejection pump is turned off when a first predetermined time elapses after the coolant ejection pump is turned on and the coolant ejection pump is turned on when a second predetermined time elapses after the coolant ejection pump is turned off.   
     
     
         3 . The coolant supply device according to  claim 1 ,
 wherein the pipe line includes a plurality of pipe lines, and the coolant ejected from the coolant ejection pump is led into the machine tool through a branching device that causes the coolant to flow into the plurality of pipe lines.   
     
     
         4 . A coolant supply device that supplies a coolant for washing chips into a machine tool, the coolant supply device comprising:
 a coolant tank that stores the coolant;   a coolant ejection pump that suctions the coolant from the coolant tank and ejects the coolant;   a pipe line that leads the coolant ejected from the coolant ejection pump into the machine tool and discharges the coolant into the machine tool;   an opening/closing valve that is provided in the course of the pipe line and is opened or closed by the pressure of the coolant;   a pressure sensor that detects the pressure of the coolant between the coolant ejection pump and the opening/closing valve; and   a pump control unit that controls the ON/OF state of the coolant ejection pump based on an output of the pressure sensor.   
     
     
         5 . The coolant supply device according to  claim 4 ,
 wherein the pipe line includes a plurality of pipe lines, and the coolant ejected from the coolant ejection pump is led into the machine tool through a branching device that causes the coolant to flow into the plurality of pipe lines.