Laser cutting and machining method for plated steel plate, laser cut-and-machined product, thermal cutting and machining method, thermal cut-and-machined product, surface-treated steel plate, laser cutting method, and laser machining head

Patent metadata

Field	Value
Publication number	US-11559857-B2
Application number	US-202016933600-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	May 18, 2016
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

A laser cut-and-machined product made from a plated steel plate. A cut face of the plated steel plate is coated with plating-layer-containing metal of a top surface of the plated steel plate that is melted and/or evaporated at the time of laser cutting and machining.

First claim

What is claimed is:

1. A laser cut-and-machined product made from a plated steel plate, the laser cut-and machined product comprising:
a plating metal layer formed on a top surface of the plated steel plate;

a cut face formed on the plated steel plate; and
a coating layer that is formed on the cut face from a material of the plating metal layer in a region around the cut face that is melted and/or evaporated at the time of laser cutting and machining.

2. The laser cut-and-machined product according to claim 1 , wherein a plating thickness of the plating metal layer around an upper edge of the cut face is thinner than a plating thickness of the plating metal layer at a position away from the cut face.

3. The laser cut-and-machined product according to claim 1 , wherein a plating melting range is within a range of 0.27 mm to 0.5 mm from the cut face.

4. A surface-treated steel plate, comprising:
a plating metal layer formed on a top surface of the surface-treated steel plate;

wherein a cut face formed on the surface- treated steel plate; and
a coating layer that is formed on the cut face from a material of the plating metal layer in a region around the cut face.

5. The surface-treated steel plate according to claim 4 , wherein an area of the coating layer that covers the cut face is 10% or more of an area of the cut face, or the coating layer covers the cut face by an extent of 30% or more of a plate thickness from a top or bottom surface of the surface-treated steel plate.

Assignees

• Amada Co Ltd
• Nisshin Steel Co Ltd

Inventors

• Hara Hideo
• Ito Masahito
• Uehara Masanori
• Asada Hiroshi
• Sasaki Hirokazu
• Horikawa Hiroshi

Classifications

• B23K26/1482

  Detachable nozzles, e.g. exchangeable or provided with breakaway lines · CPC title

• B23K2103/172

  wherein at least one of the layers is non-metallic · CPC title

• B23K2101/34

  Coated articles {; Surface treated articles} · CPC title

• B23K26/1436

  for pressure control · 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