LASER NOZZLE, LASER PROCESSING DEVICE, AND LASER PROCESSING METHOD

Title:

LASER NOZZLE, LASER PROCESSING DEVICE, AND LASER PROCESSING METHOD

Document Type and Number:

Japanese Patent JP2015167970

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a laser nozzle capable of efficiently removing dross and suppressing degradation in the quality of a laser-processed member.SOLUTION: A laser nozzle includes: an internal channel that includes a first opening supplying a laser beam and an assist gas, a second opening disposed on at least part of a circumference of the first opening, a throat portion to which a shielding gas from a shielding gas supply source is supplied, a diffusion portion connecting the throat portion to the second opening and having a cross-sectional area increasing toward the second opening; and an introduction channel having one end portion connected to the throat portion and the other end portion connected to an external space, and introducing a fluid from the external space into the internal channel. A mixture fluid of the shielding gas from the shield gas supply source and the fluid from the external space is supplied from the second opening.

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Inventors:

KOMATSU YOSHINAO
WATANABE MASANARI
FUJITANI YASUYUKI

Application Number:

JP2014044399A

Publication Date:

September 28, 2015

Filing Date:

March 06, 2014

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI HEAVY IND LTD

International Classes:

B23K26/142; B23K26/12

Domestic Patent References:

JPH06218572A	1994-08-09
JPH0342389U	1991-04-22

Foreign References:

GB1365673A

1974-09-04

Attorney, Agent or Firm:

Hiroaki Sakai
Jun Takamura

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