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Work piece automatic welding method based on grating projection three-dimensional reconstruction

An automatic welding and grating projection technology, which is applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems that it is difficult to ensure the consistency and accuracy of processing, low welding efficiency, and difficult to ensure welding effect.

Inactive Publication Date: 2017-08-18
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Manual welding is difficult to ensure the consistency and accuracy of processing in mass production, and the efficiency of welding is low, requiring a lot of human resources. Therefore, in order to ensure the welding quality of products, welding industry automation has become the main focus of future welding. Direction of development
At present, most welding robots work based on the teaching and reproduction mode, which often requires the operator to complete the teaching near the processing station, and it is extremely difficult to teach large workpieces with complex structures, and it is difficult to guarantee the welding effect. Therefore, the high-precision and rapid detection of the three-dimensional contour data of the welding workpiece is particularly important, which is the prerequisite for realizing the comprehensive automation of welding technology and improving welding efficiency and quality.

Method used

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  • Work piece automatic welding method based on grating projection three-dimensional reconstruction
  • Work piece automatic welding method based on grating projection three-dimensional reconstruction
  • Work piece automatic welding method based on grating projection three-dimensional reconstruction

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Embodiment Construction

[0010] figure 1 Shown is a schematic diagram of the structure of the raster projection system. A set of three-dimensional reconstruction system based on digital raster projection mainly includes hardware such as computer, industrial computer, camera and projector. The sinusoidal grating stripes are generated by a computer programming control projector and projected onto the reference plane and the surface of the object, and the camera is used to capture images of the reference plane and the object carrying the deformed grating stripes. First, the digital projection device projects grating stripes with sinusoidal distribution of light intensity to the reference plane, and the camera captures and saves the image of the reference plane with grating stripes at the same time. Then, put the object to be measured, project the same grating image onto the surface of the object to be measured, use a camera to capture and save the grating image deformed by the surface modulation of the ...

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Abstract

The invention discloses a work piece automatic welding method based on grating projection three-dimensional reconstruction. Welding industrial automation is a main development direction of future welding, and most of conventional welding robots adopt a teaching and playback working mode, and operators are required to approach processing stations to complete teaching, and in addition, large teaching difficulties are presented in large-scale work pieces with complicated structures, and therefore welding effect is hard to guarantee. The work piece automatic welding method based on the grating projection three-dimensional reconstruction adopts the grating projection technology for three-dimensional reconstruction of detected work pieces, and the contour three-dimensional information of the welding work pieces is acquired by combining with two-dimensional contour extraction, and is used for the automatic control of the welding robots. The work piece automatic welding method is advantageous in that the three-dimensional information of the work pieces is detected quickly, and a measuring range is wide, and measuring precision is high; the work piece automatic welding method is directly used for the operation trajectory control of the welding robots, and the full automation of the work piece detection and welding is realized.

Description

technical field [0001] The invention relates to a three-dimensional reconstruction method based on grating projection, which is used for automatic welding of workpieces. Background technique [0002] With the rapid development of modern industry, welding technology has become an important metal thermal processing technology, and has been widely used in manufacturing, materials and other industries. Manual welding is difficult to ensure the consistency and accuracy of processing in mass production, and the efficiency of welding is low, requiring a lot of human resources. Therefore, in order to ensure the welding quality of products, welding industry automation has become the main focus of future welding. Direction of development. At present, most welding robots work based on the teaching and reproduction mode, which often requires the operator to complete the teaching near the processing station, and it is extremely difficult to teach large workpieces with complex structures...

Claims

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Application Information

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IPC IPC(8): G01B11/25B23K37/00B23K31/02
CPCB23K31/02B23K37/00G01B11/254
Inventor 万敏刘清友范亚军
Owner SOUTHWEST PETROLEUM UNIV
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