Title:
LASER MACHINING DEVICE AND LASER MACHINING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/008833
Kind Code:
A1
Abstract:
A beam oscillation mechanism causes a laser beam to oscillate in a parallel direction to the direction in which cutting of a metal sheet (W) proceeds. The amplitude amount of the laser beam is Qx, the radius of a first circular region having an area occupying 86% of optical energy on the central side of the entire optical energy in the cross sectional area of the laser beam on an upper surface of the metal sheet (W) is rtop, and the radius of a second circular region having an area occupying 86% of optical energy on the central side of the entire optical energy in the cross sectional area of the laser beam on a lower surface of the metal sheet (W) is rbottom. A computed value Va is expressed by the following expression. When the standard deviation of the computed value Va when cutting the metal sheet (W) of a plurality of thicknesses is Vasd, as a nozzle (36) attached to a processing head (35), a nozzle of which the diameter of an opening (36a) is between a minimum value obtained by 2Va - Vasd and a maximum value obtained by 2.5Va + Vasd is used.
Inventors:
YAMANASHI TAKAAKI (JP)
FUNAKI KOJI (JP)
SUGIYAMA AKIHIKO (JP)
SHIGEFUJI TAKEHIKO (JP)
FUNAKI KOJI (JP)
SUGIYAMA AKIHIKO (JP)
SHIGEFUJI TAKEHIKO (JP)
Application Number:
PCT/JP2019/023490
Publication Date:
January 09, 2020
Filing Date:
June 13, 2019
Export Citation:
Assignee:
AMADA HOLDINGS CO LTD (JP)
International Classes:
B23K26/38; B23K26/082
Domestic Patent References:
| WO2015156119A1 | 2015-10-15 |
Foreign References:
| JP2007021579A | 2007-02-01 | |||
| JP2005288541A | 2005-10-20 | |||
| JP2018128774A | 2018-08-16 |
Other References:
"Shaping the beam for the best cut", THE FABRICATOR, vol. 67, January 2017 (2017-01-01)
See also references of EP 3819069A4
See also references of EP 3819069A4
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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