| 摘要 |
The present invention is characterized by a coolant feeding device of a machine tool that supplies coolant to a mist generating device (10) at the tip of a spindle (9) through a coolant feed line (40). A coolant forcing means (11) is provided to the tip of the spindle near the mist generating device to force out the coolant inside a cylinder chamber (21) through a valve path (20). The coolant inside the feed line is repeatedly fed into the cylinder chamber, whereas the coolant forced out from the cylinder chamber is fed into the mist generating device at proper pressure. When the coolant pressure inside the feed line is below a fixed level, the coolant inside the feed line flows into the cylinder chamber. When the coolant pressure inside the feed line is over a fixed level, the coolant inside the cylinder chamber is forced out to the mist generating device.According to the present invention, liquid dropping and various bad influences are prevented, and a fixed amount of coolant is intermittently fed to the mist generating device. Moreover, a proper amount of coolant is timely fed into the mist generating device by controlling actions of a coolant feed pump.
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