Patent · US Active

Method and device for producing a tear line in a planar workpiece along a predetermined contour by material removal by means of a laser

US10960494B2 · kind B2 · utility

0Cited by

1References

6Claims

0Family size

Assignee

Jenoptik Automatisierungstechnik GmbH · DE

Inventors

Walter Lutze · Jena, DE
Martin Griebel · Jena, DE
Jurgen Weisser · Dormagen, DE
Frank Seidel · Schnaittenbach, DE

Key dates

Filing date	Nov 9, 2017
Grant date	Mar 30, 2021
Priority date	—
Expiry date	Jan 3, 2039

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K2103/38
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method and device for producing a tear line on a planar workpiece by material removal by means of a pulsed laser, wherein machining cycles are preceded by a method step for generating and storing a reference signal curve which is formed by reference signals, causing the pulse amplitude of the laser pulses, via removal locations along the contour of the tear line. The achievement of a respective predetermined percentage of the reference signal or of an absolute distance from the reference signal by a measurement signal is used as the space-resolved deactivation criterion for each removal location, which measurement signal is obtained from a transmitted part of the pulse amplitude at the respective removal location.

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