# US 2017/0282294 A1 · Laser build-up method

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2017/0282294 A1
- Document ID: US20170282294A1
- Status: Published application
- Kind: A1
- Application number: 15/439,068
- Filed: 2017-02-22
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Keisuke Uchida
- Web page: https://patentgrep.com/patent/US20170282294A1

## CPC

- B23K 26/034: {Observing the temperature of the workpiece}
- B23K 26/0626: {Energy control of the laser beam (B23K26/0622 takes precedence)}
- B23K 26/082: Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
- B23K 26/144: the fluid stream containing particles, e.g. powder
- B23K 26/34: Laser welding for purposes other than joining
- B23K 26/342: Build-up welding
- B33Y 10/00: Processes of additive manufacturing
- B33Y 50/02: for controlling or regulating additive manufacturing processes
- 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
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

Provided is a laser build-up method capable of building up a layer with a uniform weld penetrating amount on first and second surfaces even when non-uniformity in distribution of supplied metallic powder due to the shape of a joint or the effect of gravity. A laser build-up method for a corner region formed by a first surface (11) and a second surface (12) in a different orientation from the first surface includes: supplying metallic powder (55) to the corner region; forming a melted part by performing weaving irradiation of a laser (25) on the first and second surfaces (11, 12) under a predetermined irradiation condition and melting the metallic powder (55); measuring a first temperature of the melted part of the first surface (11) and a second temperature of the melted part of the second surface (12); and setting the irradiation condition based on the first and second temperatures.

## Claims

### Claim 1

A laser build-up method for a corner region formed by a first surface and a second surface in a different orientation from the first surface, the laser build-up method comprising:
supplying metallic powder to the corner region;
forming a melted part by performing a weaving irradiation of a laser on the first surface and the second surface under a predetermined irradiation condition and melting the metallic powder;
measuring a first temperature of the melted part of the first surface and a second temperature of the melted part of the second surface; and
setting the irradiation condition based on the first temperature and the second temperature.

### Claim 2 (depends on 1)

The laser build-up method according to claim 1, wherein when the first temperature is higher than the second temperature, an irradiation energy of the laser on the second surface is set to be larger than the irradiation energy of the laser on the first surface, and when the first temperature is lower than the second temperature, the irradiation energy of the laser on the first surface is set to be larger than the irradiation energy of the laser on the second surface.

### Claim 3 (depends on 1)

The laser build-up method according to claim 1, wherein
when the first temperature is higher than the second temperature and a difference obtained by subtracting the second temperature from the first temperature is larger than a predetermined threshold, a scanning speed of the laser on the first surface is set to be higher than the scanning speed of the laser on the second surface, and
when the first temperature is lower than the second temperature and a difference obtained by subtracting the first temperature from the second temperature is larger than the predetermined threshold, the scanning speed of the laser on the first surface is set to be lower than the scanning speed of the laser on the second surface.

### Claim 4 (depends on 1)

The laser build-up method according to claim 1, wherein
when the first temperature is higher than the second temperature and a difference obtained by subtracting the second temperature from the first temperature is larger than a predetermined threshold, scanning of the laser is interrupted for a certain period of time on the second surface, and
when the first temperature is lower than the second temperature and a difference obtained by subtracting the first temperature from the second temperature is larger than the predetermined threshold, scanning of the laser is interrupted for a certain period of time on the first surface.