Patent · US Active

Hairpin welding method and apparatus

US12115595B2 · kind B2 · utility

0Cited by

0References

15Claims

0Family size

Assignee

TRUMPF LASER- UND SYSTEMTECHNIK GMBH · DE

Inventors

Oliver Bocksrocker · Sachsenheim, DE
Nicolai Speker · Pleidelsheim, DE
Jens Brueggebors · Schwieberdingen, DE

Key dates

Filing date	Sep 9, 2021
Grant date	Oct 15, 2024
Priority date	—
Expiry date	Apr 30, 2043

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/12
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A hairpin welding method welds wire ends of at least two copper wires, arranged flush next to one another, to one another by a laser beam. The laser beam is generated with a beam cross section that impinges on the wire ends at an end side and has a round core region and a ring region surrounding the round core region. A ratio of an external diameter of the ring region to a diameter of the core region is between 7:1 and 2:1. A ratio of a laser power in the core region to a laser power in the ring region is between 10:90 and 70:30.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.