Laser machine

Patent metadata

Field	Value
Publication number	US-2018200833-A1
Application number	US-201815874466-A
Country	US
Kind code	A1
Filing date	Jan 18, 2018
Priority date	Jan 19, 2017
Publication date	Jul 19, 2018
Grant date	—

Abstract

To provide a laser machine capable of reliably drilling a small hole when drilling of the workpiece is performed. A laser machine 1 includes: a laser oscillator; a light guide path; a processing head; and a nozzle. The nozzle includes: a nozzle tip body that irradiates the workpiece with the laser beam; a charge port formed in the nozzle tip body; and an exhaust port formed in the nozzle tip body so as to oppose to the charge port. The nozzle supplies gas to the inside of the nozzle tip body along a gas flow path extending from the charge port to the exhaust port in a form of crossing across the laser beam in the nozzle tip body, to generate a negative pressure in the vicinity of an opening part of a tip end of the nozzle tip body.

First claim

What is claimed is:

1 . A laser machine comprising: a laser oscillator that emits a laser beam;
a light guide path that guides the laser beam emitted from the laser oscillator to the workpiece; a processing head that focuses the laser beam by an optical system and irradiates the workpiece with the laser beam; and a nozzle mounted to a tip end of the processing head, the nozzle including a nozzle tip body that irradiates the workpiece with the laser beam, a charge port formed in the nozzle tip body, and an exhaust port formed opposing to the charge port in the nozzle tip body, the nozzle being configured to supply gas to the inside of the nozzle tip body along a gas flow path extending from the charge port to the exhaust port in a form of crossing across the laser beam in the nozzle tip body, to generate a negative pressure in the vicinity of an opening part of a tip end of the nozzle tip body.

2 . The laser machine according to claim 1 , wherein, in the nozzle, a diameter of the charge port is a diameter in a portion across which the gas of the laser beam in the nozzle tip body crosses, or more, and a diameter of the exhaust port is larger than the diameter of the charge port.

3 . The laser machine according to claim 1 , wherein, when the gas is supplied along the gas flow path, the nozzle causes a melted material of the workpiece to apply a suction force of the weight of the melted material or more.

4 . The laser machine according to claim 1 , wherein a gas layer that prevents the gas from intruding is formed between the optical system and the gas flow path, so that the gas supplied along the gas flow path does not reach the optical system.

5 . The laser machine according to claim 1 , wherein the nozzle is provided with an opening and closing valve that blocks exhaust of the gas supplied along the gas flow path.

6 . The laser machine according to claim 1 , wherein the nozzle is attached with a decompressor that decompresses the inside of the nozzle tip body.

7 . The laser machine according to claim 1 , wherein, in the nozzle, the tip end of the nozzle tip body is provided with the elastic member that contacts with the workpiece and improves the degree of enclosure of the nozzle tip body by the workpiece.

Assignees

• Fanuc Corp

Inventors

• Izumi Takashi

Classifications

• B23K26/1476

  Features inside the nozzle for feeding the fluid stream through the nozzle · CPC title

• B23K26/14

  using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor (B23K26/12 takes precedence) · CPC title

• B23K26/382 Primary

  by boring · CPC title

• B23K26/142

  for the removal of by-products · CPC title

• B23K26/21

  by welding · CPC title