Method and apparatus for removing substance from the surface of a workpiece
First Claim
1. Apparatus for removing material from the surface of a workpiece (11), material removal being made layer-wise by irradiating a working site (34, 46) at the surface of the workpiece with a laser beam (12) from a working head (13), comprising a laser beam guidance which guides, within a working area (Bx, By, 31a-d, 41a-d), the laser beam across the surface of the workpiece (11), characterised by a positioning means including a controller configured to, after start of the material removal, change and adjust the relative position of workpiece (11) and working head (13) in accordance with a first and/or a second criteria such that, in different layers, a boundary (31-33, 40-45) of the working area (Bx, By, 31a-d, 41a-d) for the same working site (34, 46) is positioned differently on the workpiece surface.
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Accused Products
Abstract
A method of removing substance from the surface of a workpiece in which the removal of substance is effected layer-wise by irradiating a working site on the workpiece surface with a laser beam from a working head, the layer-wise removal of substance being carried out with the aid of a laser guidance guiding the laser across the surface of the workpiece within a working area predetermined by the apparatus, comprises positioning steps in which, after the start of the substance removal, the relative position of the workpiece and the working head are changed in accordance with a first and/or second criterion and adjusted so that a boundary of the working area comes to be disposed on different sections of the workpiece surface for identical working sites.
51 Citations
8 Claims
- 1. Apparatus for removing material from the surface of a workpiece (11), material removal being made layer-wise by irradiating a working site (34, 46) at the surface of the workpiece with a laser beam (12) from a working head (13), comprising a laser beam guidance which guides, within a working area (Bx, By, 31a-d, 41a-d), the laser beam across the surface of the workpiece (11), characterised by a positioning means including a controller configured to, after start of the material removal, change and adjust the relative position of workpiece (11) and working head (13) in accordance with a first and/or a second criteria such that, in different layers, a boundary (31-33, 40-45) of the working area (Bx, By, 31a-d, 41a-d) for the same working site (34, 46) is positioned differently on the workpiece surface.
Specification