US5225650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for the manufacture of cavities in workpieces through laser beams
Assignee: LCTEC LASER-UND COMPUTERTECHNIK GmbH
•
Filing: 1992-03-05
•
Granted: 1993-07-06
•
Expires: 2012-03-05
Abstract
Abstract The invention concerns a process and a device for the manufacture of relatively deep cavities in massive workpieces through a laser beam, whereby the material is removed by the laser beam (7) in close guide paths. According to the invention, during each linear ablation process the laser beam (7) deviated vertically is rotated by a predetermined angle while the workpiece (12) is moved back and forth synchronously on a circular path (14) around the rotating axis (4) of the laser beam (7). Upon ablation of a material layer, these linear ablation processes are repeated until the predetermined depth of the cavity has been reached. According to the invention, pocket-like or chamber-like cavities (13) with vertical or undercut walls can be produced with considerable ablation performance in often inappropriate materials such as ceramics, titanium, etc.
Inventors
- 👤 Werner Babel
- 👤 Peter Grund
- 👤 Gunter Eberl
- 👤 Uli Sutor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:56
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/14; B23K26/08; B23K26/0823; B23K26/36; B23K26/361; B23K26/362; B23K26/364; B23K26/40; B23K2103/00; B23K2103/08; B23K2103/14; B23K2103/50; B23K2103/52
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
98 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guideways, the process comprising the steps of: rotating the laser beam during each linear ablation process by a predetermined angle; and whereby at the same time moving the workpiece back and forth synchronously on a circular curve by the rotating axis of the laser beam; repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 2
Dependent Claim
98 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guideways, the process comprising the steps of: rotating the laser beam during each linear ablation process by a predetermined angle; and whereby at the same time moving the workpiece back and forth synchronously on a circular curve by the rotating axis of the laser beam; repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 3
Dependent Claim
88 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guidepaths, the process comprising the steps of: moving the laser beam back and forth during each linear ablation process; and at the same time causing the workpiece to execute synchronous rotation and feed movements; and repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 4
Dependent Claim
88 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guidepaths, the process comprising the steps of: moving the laser beam back and forth during each linear ablation process; and at the same time causing the workpiece to execute synchronous rotation and feed movements; and repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 5
Dependent Claim
40 words
The process in accordance with claim 1 or 2, and comprising the further step of vertically deflecting the horizontal laser beam by means of a slanted reflector; and rotating the reflector to deviate the beam section impacting on the workpiece.
Claim 6
Dependent Claim
22 words
The process in accordance with claim 1 or 2 and comprising the further step of rotating the workpiece around its longitudinal axis.
Claim 7
Dependent Claim
92 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guidepaths, the process comprising the steps of: rotating the workpiece around a vertical axis in a predetermined angle during each linear ablation process; moving the focal point of the focused laser beam moved synchronously in the beam axis; and repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 8
Dependent Claim
92 words
A process for the manufacture of cavities in massive workpieces by means of a laser beam, whereby the material is removed by the laser beam through back-and-forth feed movements in closely adjacent guidepaths, the process comprising the steps of: rotating the workpiece around a vertical axis in a predetermined angle during each linear ablation process; moving the focal point of the focused laser beam moved synchronously in the beam axis; and repeating these linear ablation processes one material layer at a time until the predetermined depth of the cavity has been reached.
Claim 9
Dependent Claim
41 words
The process in accordance with one of claims 1, 2 or 5, and comprising the further step of increasing the angle of rotation of the laser beam or of the workpiece continuously or by a predetermined amount with each step-like ablation.
Claim 10
Dependent Claim
27 words
The process, in accordance with one of claims 1, 2 or 5, and comprising the further step of rotating the workpiece 90° after each layered ablation process.
Claim 11
Dependent Claim
37 words
The process in accordance with one of claims 1, 2 or 5, and comprising the further step of directing at least one pressure fluid beam to the point of ablation coaxially and/or slanted to the laser beam.
Claim 12
Dependent Claim
33 words
The process in accordance with one of claims 1, 2 or 5, and comprising the further step of decreasing the performance of the laser beam for machining the bottom surface of the recess.
Claim 13
Dependent Claim
30 words
The process in accordance with one of claims 1, 2 or 5, and comprising the further step of defocussing the laser beam for machining the bottom surface of the recess.
Claim 14
Dependent Claim
20 words
The process in accordance with claim 3, and comprising the further step of rotating the workpiece around its longitudinal axis.
Claim 15
Dependent Claim
36 words
The process in accordance with claim 3, and comprising the further step of increasing the angle of rotation of the laser beam or of the workpiece continuously or by a predetermined amount with each step-like ablation.
Claim 16
Dependent Claim
36 words
The process in accordance with claim 4, and comprising the further step of increasing the angle of rotation of the laser beam or of the workpiece continuously or by a predetermined amount with each step-like ablation.
Claim 17
Dependent Claim
22 words
The process in accordance with claim 3, and comprising the further step of rotating the workpiece 90° after each layered ablation process.
Claim 18
Dependent Claim
32 words
The process in accordance with claim 3, and comprising the further step of directing at least one pressure fluid beam to the point of ablation coaxially and/or slanted to the laser beam.
Claim 19
Dependent Claim
28 words
The process in accordance with claim 3, and comprising the further step of decreasing the performance of the laser beam for machining the bottom surface of the recess.
Claim 20
Dependent Claim
25 words
The process in accordance with claim 3, and comprising the further step of defocussing the laser beam for machining the bottom surface of the recess.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |