Title:
METHOD AND DEVICE FOR SUPPLYING ASSIST GAS FOR LASER MACHINE
Document Type and Number:
Japanese Patent JP3291125
Kind Code:
B2
Abstract:
PURPOSE: To execute cutting not having sticking of dross by adjusting pressure difference between first and second outlets of a separating device and maintaining purity of nitrogen rich gas, which is supplied as assist gas for a laser machining head, in the prescribed range while assist gas pressure changes.
CONSTITUTION: For the purpose that a pressure of the nitrogen rich gas which is supplied to a laser chining head 9 depending on a laser machining condition, is corresponded to the machining condition, by operating a first pilot operated valve 25A, the setting of a first pressure regulating valve 15A is changed. At this time, because a differential pressure between a first conduit 11 and second conduit 13 is changed, the purity of nitrogen rich gas is changed. Accordingly, by operating a second pilot operated valve 25B so as to change the setting of a second pressure regulating valve 15B, a pressure difference between the first/second conduits is controlled. As a result, a purity of the nitrogen rich gas from a first outlet 1B of a first separating device 1 is maintained to the prescribed range (94-99.5%).
Inventors:
Noriaki Shioji
Application Number:
JP12514094A
Publication Date:
June 10, 2002
Filing Date:
June 07, 1994
Export Citation:
Assignee:
Amada Co., Ltd.
International Classes:
B01D53/22; B23K26/14; (IPC1-7): B23K26/14
Domestic Patent References:
| JP61150794A | ||||
| JP584590A | ||||
| JP6227803A | ||||
| JP724588A |
Attorney, Agent or Firm:
Hidekazu Miyoshi (8 outside)