Patent ID: 7822294
Filing Date: 2010-10-26
Classification: B23K,B29L

Abstract:
1. A method for producing three-dimensionally structured surfaces of objects, an object surface being produced with an aid of a machine tool as a reproduction of a three-dimensionally structured original surface being finite and bounded by borders, a topology of the original surface first being determined with an aid of a scanning method and topological data determined in this way and substantially containing heights belonging to each area element of the original surface being used for electronic control of the machine tool for machining a three-dimensionally structured object surface, which comprises the steps of: a) storing a first data record with a topology of a bounded original surface, the first data record containing measured items of height information of respectively associated area elements of the bounded original surface; b) subsequently storing a second data record, corresponding to a randomly generated topology of an unbounded reproduction surface, the second data record containing randomly generated items of height information for respectively associated area elements of the unbounded reproduction surface; c) around a first random item of height information of the unbounded reproduction surface, grouping together a number of neighboring random items of height information to form a first subset and storing the first subset in a third data record, a position and configuration of the neighboring random items of height information likewise being stored by coordinates of the respectively associated area elements of the unbounded reproduction surface; d) repeatedly comparing the third data record with a fourth data record, the fourth data record being occupied by new data with every new comparison by the further steps of: e) on reaching a defined similarity between an item of height information of the first subset and the items of height information of the second subset, the first random item of height information of the bounded reproduction surface is substituted by a second item of height information of the bounded original surface, which corresponds in its position and configuration with respect to the second subset to the position and configuration of the first item of height information with respect to the first subset; f) carrying out and repeating the method steps c) to e) with different first and second subsets and successively for all the items of height information of the unbounded reproduction surface as often as it takes until all items of height information of the unbounded reproduction surface have been successively substituted by items of height information from the bounded original surface, the items of height information that have already been substituted in the unbounded reproduction surface with an aid of at least one preceding method steps e) being included in the first subset for carrying out method step c) for the comparison of the subsets in method step d); g) after all the items of height information of the unbounded reproduction surface have been substituted by items of height information of the bounded original surface in method step f), method steps a) to f) are run through at least one more further time, the area elements respectively associated with the items of height information being reduced with every further run, and a reaching of a defined similarity between a new first subset and the neighboring items of height information already stored in a previous run of method steps a) to f) being checked in method step e) as a simultaneous further criterion; h) after reaching a defined similarity between the unbounded reproduction surface and the bounded original surface, the items of height information of the unbounded reproduction surface are made available for controlling the machine tool for machining the three-dimensionally structured object surface; and i) controlling the machine tool for machining the three dimensionally structured object surface using the items of height information made available in step h).