# US 2022/0032401 A1 · Laser processing method, laser processing device, and method for producing laser processed product

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- Number: US 2022/0032401 A1
- Document ID: US20220032401A1
- Status: Published application
- Kind: A1
- Application number: 17/279,828
- Filed: 2019-09-17
- Published: 2022-02-03
- Earliest claimed: 2018-09-27
- Assignees: Amada Company, Limited
- Applicants: Amada Co., Ltd.
- Inventors: Shiroyuki MIYABUCHI; Takahiro YAMAZAKI; Takayuki KAMIYAMA; Yutaka MASHIKO; Haruya SATOU
- Web page: https://patentgrep.com/patent/US20220032401A1

## CPC

- B23K 26/0884: {in at least three axial directions, e.g. manipulators, robots}
- B23K 26/38: by boring or cutting
- B23K 26/073: Shaping the laser spot
- B23K 26/0823: {Devices involving rotation of the workpiece}
- B23K 26/0876: {in at least two axial directions}
- B23K 26/0892: {Controlling the laser beam travel length}
- B23K 2101/045: {Hollow panels}
- B23K 2101/28: Beams
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## Abstract

A workpiece having a first plate-shaped part and a second plate-shaped part connected to the first plate-shaped part in a direction to cross the first plate-shaped part is cut with a laser beam. A cutting line across the first plate-shaped part and the second plate-shaped part is set. In the second plate-shaped part, a notch portion that opens to a tip end portion of the second plate-shaped part and is along the cutting line is formed by cutting with the laser beam so that a cutout piece that is cut out by forming the notch portion is divided into a tip end portion and a base portion. The first plate-shaped part is cut along the cutting line by irradiation with the laser beam from one direction.

## Claims

### Claim 1

A laser processing method, comprising:
setting a cutting line across a first plate-shaped part and a second plate-shaped part to a workpiece including the first plate-shaped part and the second plate-shaped part connected to the first plate-shaped part in a direction to cross the first plate-shaped part;
forming, by cutting with a laser beam, a notch portion in the second plate-shaped part so that a cutout piece cut out by forming the notch portion is divided into a tip end portion and a base portion, the notch portion opening to a tip end portion of the second plate-shaped part and being along the cutting line; and
cutting the first plate-shaped part along the cutting line by irradiation with the laser beam from one direction.

### Claim 2 (depends on 1)

The laser processing method according to claim 1, further comprising:
dividing the cutout piece into the tip end portion and the base portion by moving the laser beam in a direction to approach the cutting line; and
stopping the laser beam that is moved in the direction to approach the cutting line at a position separated from the cutting line by a distance equal to or more than a beam radius of the laser beam for irradiation when the notch portion is cut along the cutting line.

### Claim 3

A laser processing device, comprising:
a processing head configured to emit a laser beam; and
a controller configured to control emission of the laser beam and movement of the processing head on a predetermined path, wherein
when the controller controls a workpiece including a first plate-shaped part and a second plate-shaped part connecting to the first plate-shaped part in a direction to cross the first plate-shaped part such that the workpiece is cut with the laser beam,
the controller is configured to
set a cutting line across the first plate-shaped part and the second plate-shaped part,
form a notch portion in the second plate-shaped part by controlling emission of the laser beam and movement of the processing head so that a cutout piece cut out by forming the notch portion is divided into a tip end portion and a base portion, the notch portion opening to a tip end portion of the second plate-shaped part and being along the cutting line, and
control emission of the laser beam and movement of the processing head so as to cut the first plate-shaped part along the cutting line by irradiation with the laser beam from one direction.

### Claim 4

A method for producing a laser processed product, comprising:
setting a cutting line across a first plate-shaped part and a second plate-shaped part to a workpiece including the first plate-shaped part and the second plate-shaped part connected to the first plate-shaped part in a direction to cross the first plate-shaped part;
forming, by cutting with a laser beam, a notch portion in the second plate-shaped part so that a cutout piece cut out by forming the notch portion is divided into a tip end portion and a base portion, the notch portion opening to a tip end portion of the second plate-shaped part and being along the cutting line; and
producing a laser processed product by cutting the first plate-shaped part along the cutting line by irradiation with the laser beam from one direction, in a state where at least the base portion of the cutout piece is removed.