Title:
METHOD AND DEVICE FOR THE SEPARATION OF FLAT WORKPIECES MADE FROM A BRITTLE MATERIAL
Document Type and Number:
WIPO Patent Application WO2001049444
Kind Code:
A3
Abstract:
In a conventional method, a laser beam, with a linear beam profile and a following cool-spot to increase the thermomechanical stress, is moved along a separating line of predetermined shape. According to the invention, in order to be able to separate any shape (free-form cutting), the method is carried out, whereby a linear focal point is generated, on the workpiece, by means of scanning the laser beam and, during each scanning movement, tracking data for the separation line (2) is generated, such that the linear focal point is given a curvature corresponding to the curvature of the shape of the separation line, by adjusting the scan amplitude.
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Inventors:
HAUER DIRK (DE)
HOETZEL BERNDT (DE)
HOETZEL BERNDT (DE)
Application Number:
PCT/EP2000/012460
Publication Date:
December 20, 2001
Filing Date:
December 09, 2000
Export Citation:
Assignee:
SCHOTT GLAS (DE)
ZEISS STIFTUNG (DE)
HAUER DIRK (DE)
HOETZEL BERNDT (DE)
ZEISS STIFTUNG (DE)
HAUER DIRK (DE)
HOETZEL BERNDT (DE)
International Classes:
B23K26/00; B23K26/073; B23K26/08; B23K26/082; B23K26/364; B28D1/00; B23K26/40; C03B33/04; C03B33/09; (IPC1-7): B23K26/40; B23K26/073; C03B33/09; C04B41/00; B23K26/08
Domestic Patent References:
| WO1996020062A1 | 1996-07-04 | |||
| WO1993020015A1 | 1993-10-14 |
Foreign References:
| US4725709A | 1988-02-16 | |||
| EP0872303A2 | 1998-10-21 |
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