A cutting fluid supplying device, comprising:
- a machine tool having a structure body and at least one ejection port for ejecting a cutting fluid, the structure body having a bed, a column disposed on the bed, and a spindle head disposed to the column;
- a storage tank for storing the cutting fluid to be supplied to the machine tool;
- a cutting fluid flow passage connecting the storage tank and the ejection port;
- at least one pump for applying pressure to the cutting fluid to supply the cutting fluid stored in the storage tank to the cutting fluid flow passage;
- at least one temperature sensor for detecting a temperature of the structure body;
- and
- at least one temperature control device for adjusting a temperature of the cutting fluid stored in the storage tank so as to make the temperature of the structure body detected by the temperature sensor identical to a predetermined temperature,
- wherein the cutting fluid flow passage has a first cutting fluid flow passage disposed to penetrate through or disposed on an outer surface of the spindle head, a second cutting fluid flow passage disposed to penetrate through or disposed on an outer surface of the column, and a third cutting fluid flow passage disposed to penetrate through or disposed on an outer surface of the bed, heat exchange being possible between the cutting fluid and the spindle head via the first cutting fluid flow passage in which the cutting fluid flows and winds through the spindle head along the first cutting fluid flow passage, heat exchange being possible between the cutting fluid and the column via the second cutting fluid flow passage in which the cutting fluid flows and winds through the column along the second cutting fluid flow passage, and heat exchange being possible between the cutting fluid and the bed via the third cutting fluid flow passage in which the cutting fluid flows and winds through the bed along the third cutting fluid flow passage,
- the temperature control device has a first temperature control device for adjusting the temperature of the cutting fluid to be supplied to the first cutting fluid flow passage and the second cutting fluid flow passage, respectively, and a second temperature control device for adjusting the temperature of the cutting fluid to be supplied to the third cutting fluid flow passage,
- each of the first temperature control device and the second temperature control device is capable of independently controlling the temperature of the cutting fluid, and
- the first cutting fluid flow passage, the second cutting fluid flow passage and the third cutting fluid flow passage are each supplied with cutting fluid from a different pump.