Method and device for processing arbitrary 3D shaped surfaces by means of a laser, in particular for polishing and texturing workpieces, and for producing sealing surfaces on dies
First Claim
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1. Method for producing sealing surfaces on complementary dies having at least two complementary partial sealing surfaces, having the following method steps:
- a) fixing the three-dimensional co-ordinates of one of the complementary partial sealing surfaces as desired data;
b) scanning at least one complementary partial sealing surface by means of a three-dimensional contour-measuring device in order to determine the precise, actual surface shape of these partial sealing surfaces in a reference coordinate system as actual data;
c) calculating processing parameters for a beam-processing device for removing material layers on the basis of the desired data determined and on the basis of the actual data determined by the three-dimensional contour-measuring device;
d) processing one of the complementary partial sealing surfaces by means of the beam-processing device on the basis of the processing parameters determined in step c);
e) re-scanning of the partial sealing surface processed in step d), by means of the three-dimensional contour-measuring device in order to determine the surface shape of the partial sealing surfaces now present after processing as updated actual data;
f) if appropriate, repeating steps b) to e) until the deviation of the desired data from the actual data is within a determined tolerance range; and
g) fixing of the surface shape, last determined in step e), or of a complementary partial sealing surface which has already been processed as the desired shape for the other complementary partial sealing surfaces; and
h) processing of the other complementary partial sealing surface in accordance with steps c) to f).
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Abstract
A method and device for polishing and texturing workpieces by which arbitrary two-dimensional and three-dimensional shaped surfaces can be processed. The processing is performed by a laser beam. The actual surface shape and surface texture are determined before processing by a contour-measuring device. Processing parameters are calculated from the desired surface shape and the surface shape actually measured, and the processing is carried out subsequently as appropriate.
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Citations
24 Claims
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1. Method for producing sealing surfaces on complementary dies having at least two complementary partial sealing surfaces, having the following method steps:
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a) fixing the three-dimensional co-ordinates of one of the complementary partial sealing surfaces as desired data; b) scanning at least one complementary partial sealing surface by means of a three-dimensional contour-measuring device in order to determine the precise, actual surface shape of these partial sealing surfaces in a reference coordinate system as actual data; c) calculating processing parameters for a beam-processing device for removing material layers on the basis of the desired data determined and on the basis of the actual data determined by the three-dimensional contour-measuring device; d) processing one of the complementary partial sealing surfaces by means of the beam-processing device on the basis of the processing parameters determined in step c); e) re-scanning of the partial sealing surface processed in step d), by means of the three-dimensional contour-measuring device in order to determine the surface shape of the partial sealing surfaces now present after processing as updated actual data; f) if appropriate, repeating steps b) to e) until the deviation of the desired data from the actual data is within a determined tolerance range; and g) fixing of the surface shape, last determined in step e), or of a complementary partial sealing surface which has already been processed as the desired shape for the other complementary partial sealing surfaces; and h) processing of the other complementary partial sealing surface in accordance with steps c) to f). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. Method for producing sealing surfaces on complementary dies having at least two complementary partial sealing surfaces, having the following method steps:
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a) arranging the complementary dies in such a way that the spacing between mutually corresponding surface sections of the partial sealing surfaces is within a first tolerance range; b) determining the precise spacing of mutually corresponding surface sections of partial sealing surfaces by means of a three-dimensional contour-measuring device as actual data; c) fixing a desired spacing which is at least as large as the largest actual spacing; d) calculating processing parameters for a beam-processing device for removing material layers on the basis of the desired data determined and on the basis of the actual data determined by the three-dimensional contour-measuring device; e) processing at least one of the complementary partial sealing surfaces by means of the beam-processing device on the basis of the processing parameters determined in step d); f) re-determining of the precise spacing of mutually corresponding surface sections of partial sealing surfaces by means of the three-dimensional contour-measuring device as updated actual data; g) if appropriate, repeating steps d) to f) until the deviation of the desired data from the actual data is within a second tolerance range which is smaller than the first tolerance range. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. Device for polishing and texturing, arbitrary three-dimensional shaped surfaces by means of a laser beam, having:
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a laser device for generating a laser beam having specific characteristics; a device for guiding and directing the laser beam in such a way that sub-surfaces of the surface to be processed are swept over sequentially in time by the laser beam; a first three-dimensional contour-measuring device for scanning and recording the three-dimensional profile of the three-dimensional shaped surface to be processed by scanning the sub-surface regions, swept over by the laser beam, directly ahead of the laser beam sweeping over the sub-surface to be processed; and a control device for controlling the three-dimensional contour-measuring device and for controlling and regulating the laser device and the device for guiding and directing the laser beam as a function of the three-dimensional profile detected by the three-dimensional contour-measuring device, characterized in that the laser device is a Cu-vapour laser ablation device and comprises a focusing device which generates a focused processing beam having a Raleigh length of greater than or equal to 300 μ
m. - View Dependent Claims (21, 22, 23, 24)
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Specification