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Precise three-dimensional curved surface laser marking method

A three-dimensional curved surface and laser marking technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as image distortion, image distortion, and laser spot deviating from the focus, so as to avoid distortion and accurately mark the position Effect

Inactive Publication Date: 2015-01-07
苏州菲镭泰克激光技术有限公司
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Problems solved by technology

The disadvantages of this method are: on the one hand, the mapping coordinates are usually calculated by interpolation in real time during the marking process, and it is easy for laser spots at different heights to deviate from the focus, thereby causing image distortion; on the other hand, for Three-dimensional curved surfaces with sudden changes in curvature and large deviations in flatness are prone to serious image distortion during the marking process

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  • Precise three-dimensional curved surface laser marking method
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  • Precise three-dimensional curved surface laser marking method

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] figure 1 is a flow chart of the method. to combine figure 2 and image 3 In the specific embodiment shown, a precise three-dimensional curved surface laser marking method disclosed by the present invention includes the following steps:

[0029] S1: Obtain a 3D object model mapped with a 2D image

[0030] Specifically, the surface expansion algorithm is used to expand the three-dimensional object model to generate a two-dimensional expanded graphic; the two-dimensional image is mapped on the two-dimensional expanded graphic to generate a two-dimensional expanded graphic mapped with a two-dimensional image; the mapped two-dimensional image is 2D unwrapped graphics, converted to generate 3D object models mapped with 2D images.

[0031] Wherein, the surface expansion algorithm may be known surface expansion algorithms such as triangul...

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Abstract

The invention discloses a precise three-dimensional curved surface laser marking method. The method comprises unwrapping a three-dimensional object model into a two-dimensional unwrapped graph through a curved surface unwrapping algorithm, then mapping two dimensional images onto the two-dimensional graph, and converting the two-dimensional unwrapped graph mapped with the two-dimensional images into a three-dimensional object model mapped with the two-dimensional images; on the basis of the three-dimensional object model, establishing a three-dimensional coordinate system, taking the origin coordinate as the starting point to compute and obtain the mapping points of the two-dimensional images on the three-dimensional object model layer by layer in the surface direction of the three-dimensional object model, performing distortion error correction on the obtained mapping point coordinates to generate position marking parameters and storing the position marking parameters into a database; during marking, reading the database through a dynamic marking system, and marking the surface of an object according to the position marking parameters. The precise three-dimensional curved surface laser marking method can achieve rapid and precise marking on the surfaces of objects in random shapes; the two-dimensional images marked on the surfaces of the objects can avoid distortion.

Description

technical field [0001] The invention relates to a precise three-dimensional curved surface laser marking method, which belongs to the field of laser processing such as laser marking and engraving. Background technique [0002] Compared with traditional two-dimensional laser processing, three-dimensional laser marking can realize laser processing on curved surface workpieces, with high marking accuracy and rich processing creativity. At present, 3D laser marking technologies including laser marking and engraving are developing vigorously. In the next few years, the application of laser marking will gradually transition from 2D to 3D, and penetrate into various fields of life and industry. [0003] At present, two-dimensional laser marking technology can realize marking on the plane of the product, and its technological development is quite mature. However, for three-dimensional laser marking, how to achieve accurate and distortion-free marking on the surface of three-dimensio...

Claims

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Application Information

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IPC IPC(8): B23K26/362
Inventor 杨海青
Owner 苏州菲镭泰克激光技术有限公司
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