Laser tailored welding curved surface abutted seam measuring method and realization device thereof

A measurement method, laser tailor welding technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of inability to carry out closed-loop control of production, measurement accuracy needs to be further improved, and inability to obtain surface normal vectors in real time.
CN105300296AInactive Publication Date: 2016-02-03SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Publication Date
2016-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a laser tailored welding curved surface abutted seam measuring method and a realization device thereof. The method comprises the following steps: generating circular structured light by utilizing a circular laser, and generating horizontal-I linear structured light by utilizing a horizontal-I linear laser, wherein the circular structured light and the horizontal-I linear structured light are projected to the surface of a curved surface abutted seam and intersected; collecting and obtaining an abutted seam surface gray level image comprising the horizontal-I linear structured light and the circular structured light through a sensing unit, and transmitting the collected image to an image processing unit; and carrying out processing by the image processing unit on the collected image to obtain three-dimensional position and normal vector of the curved surface abutted seam center and abutted seam width and mismatching values. The device comprises the sensing unit for collecting the laser tailored welding curved surface abutted seam image and transmitting the image to the processing unit; the image processing unit for carrying out processing on the collected abutted seam image; and a parameter setting and control unit for setting parameters and in communication connection with the sensing unit, the image processing unit and an upper computer. The laser tailored welding curved surface abutted seam measurement precision is improved, online tracking adjustment of the pose of a welding torch for curved surface laser tailored welding is realized favorably, welding quality is ensured.
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Description

technical field

[0001] The invention belongs to the technical field of seam tracking and detection, and in particular relates to a method for measuring a seam of a laser tailor welding curved surface and a device for realizing it. Background technique

[0002] Tailored laser welding uses laser as welding energy to butt weld a number of plates with different materials, different thicknesses and different coatings. For curved surface seams, due to the different sources of the pieces to be soldered, there are differences in the quality of the edge of the pieces, it is difficult to ensure the consistency and repeatability of the entire seam size, and due to the existence of welding stress, it will make the welding process The weld gap changes. Therefore, in the welding process, it is difficult to meet the welding accuracy and quality requirements only by teaching, reproduction and pre-clamping methods. In order to ensure the welding quality and improve the adaptability of lase...

Claims

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