Measuring and machining integrated laser three-dimensional marking method and device

A laser three-dimensional, laser technology, used in typewriters, printing, digital control and other directions to achieve the effect of reducing costs

Inactive Publication Date: 2009-08-05
王晓宇
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Laser processing on three-dimensional surfaces includes research on three-dimensional laser welding, material surface heat treatment, etc. They focus on the physical effects a

Method used

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  • Measuring and machining integrated laser three-dimensional marking method and device
  • Measuring and machining integrated laser three-dimensional marking method and device
  • Measuring and machining integrated laser three-dimensional marking method and device

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Embodiment Construction

[0027] 1. The overall process flow

[0028] The following will combine figure 1 The overall technological process of the present invention is described. After the optical camera is installed and fixed, the camera must be calibrated to obtain the positional relationship data between the camera and the workbench of the engraving machine. The present invention can use the calibration algorithm of the single-point laser displacement meter. The algorithm is the classic laser triangulation method.

[0029] After the calibration is completed, after the target part is fixed on the workbench, enter the three-dimensional measurement step, control the laser to scan at a fixed point at a lower power at this time, and obtain a series of collected images, from the collected images through the image processing algorithm, automatically find the For the center of the light spot, the depth information of the light spot can be measured according to the displacement of the light spot combined wi...

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Abstract

The invention provides a laser three-dimensional marking method and a device. The method comprises the following specific steps: installing and fixing a camera in a position pointing to a workbench of a laser inside-carving machine; calibrating structural parameters of the camera; placing a target part on the workbench, and measuring point cloud data of space three-dimensional coordinates of light spots on the surface to be processed of the target part; topologically reconstructing the point cloud data to form an STL triangular surface patch; inducing a part model STL document, taking an image to be marked as a grain, and pasting the grain on a triangular surface patch grid provided by the STL; iterating the triangular surface patch grid, judging the gray-scale value on the grid, and judging whether marking is needed or not according to the gray-scale value; recording the coordinates of points which need to be marked to form a marking point set list; sequencing the marking point set according to the magnitude of a Z value to generate marking point set data; and controlling the processing power of a laser to mark according to the marking point set data by CNC software. On the basis of the laser inside-carving machine, the laser three-dimensional marking device is provided with the optical camera.

Description

technical field [0001] The invention relates to a laser three-dimensional marking method integrating measurement and processing and a device used therefor. The laser three-dimensional marking method is a three-dimensional surface marking process and belongs to the field of laser processing. Background technique [0002] In recent years, laser processing technology has been successfully applied in countless industrial applications. It is a non-contact special processing method that uses high-power-density laser beams to irradiate workpieces to melt or gasify materials. Compared with traditional solutions, the use of optical scanning systems such as galvanometers and lenses brings many advantages: high level of dynamic performance and processing speed; elimination of mechanical tool wear; non-contact processing; small and precisely defined thermal Area of ​​influence; unique flexibility, no need for finishing, etc. Laser marking processing is one of the most important enginee...

Claims

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Application Information

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IPC IPC(8): B41J3/407B41J2/475G05B19/19
Inventor 王晓宇唐东平陈刚周立文
Owner 王晓宇
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