Patent ID: 11878370
Assignee: AMADA CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. A method of supplying cooling water to a laser processing head, the method comprising:
providing, in a cooling water supply path connected to the laser processing head, a cooling water tank for storing cooling water,
providing a discharge tank,
connecting, to the cooling water tank, a water supply path for supplying water and an antirust supply path for supplying antirust,
mixing, in the cooling water tank, water fed by a water feeder connected to the water supply path and antirust fed by an antirust feeder connected to the antirust feed path, adjusting a water feed quantity and/or an antirust feed quantity so that a conductivity of the cooling water in the cooling water tank comes within a preset range,
providing a changeover valve that selectively opens and closes the cooling water supply path,
operating the changeover valve to discharge the cooling water to the discharge tank and detecting the conductivity of the cooling water before supplying the cooling water to the laser processing head,
maintaining the conductivity of the cooling water within the preset range,
in a state where the conductivity of the cooling water is within the preset range, operating the changeover valve to supply the cooling water to the laser processing head, and
providing a feed capacity of the antirust to be smaller than a feed capacity of the water.