Depth measurement and depth control or automatic depth control for a hollow to be produced by a laser processing device
First Claim
1. A method for making a specifically formed hollow in a work piece by means of a laser machining apparatus which, in a layer-wise manner, removes material from the work piece in horizontal layers, wherein the horizontal boundaries of the hollow change in at least one layer, the method comprising:
- continuously measuring a depth of the hollow being formed; and
determining the horizontal boundaries to be removed in the next subsequent layer based on the measured depth of the current layer of the hollow and a form definition of the hollow.
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Abstract
According to a method for a depth measurement the depths of measuring points on a calibration surface are measured and correction values depending on differences between the measured values and known values are used and stored for a later correction. According to a method for the layer-wise production of a hollow the horizontal boundaries (xg, yg) for the removal of a layer (Si+1) depending on the hollow depth (z) were determined from the shape definition of the hollow. The measured values can be continuously stored and used for a later control of the laser processing device.
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Citations
17 Claims
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1. A method for making a specifically formed hollow in a work piece by means of a laser machining apparatus which, in a layer-wise manner, removes material from the work piece in horizontal layers, wherein the horizontal boundaries of the hollow change in at least one layer, the method comprising:
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continuously measuring a depth of the hollow being formed; and determining the horizontal boundaries to be removed in the next subsequent layer based on the measured depth of the current layer of the hollow and a form definition of the hollow. - View Dependent Claims (2, 3)
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4. A method for forming a specifically formed hollow in a work piece by means of a laser machining apparatus which removes, in a layer-wise manner, material of the work piece in accordance with a defined shape, the method comprising:
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continuously measuring the depth of the hollow; continuously storing the measured depth together with respective coordinates or at memory locations corresponding to the respective coordinates; and controlling the laser machining apparatus during removal of subsequent layers based on the stored depth. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification