# US 4,572,941 A · Method of and installation for spot-welding by laser beam

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- Number: US 4,572,941 A
- Document ID: US4572941A
- Status: Granted
- Kind: A
- Application number: 06/624,654
- Filed: 1984-06-26
- Granted: 1986-02-25
- Earliest claimed: 1983-06-27
- Assignees: Sciaky, Inc.
- Inventors: Mario Sciaky; Roland Cazes; Georges Sayegh
- Web page: https://patentgrep.com/patent/US4572941A

## CPC

- B23K 26/0608: {in the same heat affected zone [HAZ] (B23K26/0613, B23K26/0619 take precedence)}
- B23K 26/067: Dividing the beam into multiple beams, e.g. multi-focusing
- B23K 26/08: Devices involving relative movement between laser beam and workpiece
- B23K 26/22: Spot welding
- B23K 26/244: Overlap seam welding
- 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 method of spot-welding by laser beam, comprising a laser beam generator (10) and at least one means receiving the laser beam and focusing it on the pieces to be welded.

## Claims

### Claim 1

A method of spot-welding by laser beam, comprising generating a laser beam, rotating said beam about an axis parallel to its longitudinal axis, directing said rotated beam onto a static focusing means and directing the point of focus of said rotated beam by said static focusing means onto the objects to be welded.

### Claim 2 (depends on 1)

A method according to claim 1, characterised in that the laser beam is displaced in one plane.