Asymmetric fillet weld welding quality detecting method based on positive molten pool image features
A technology of welding quality and detection method, applied in welding equipment, welding accessories, arc welding equipment, etc., to achieve the effect of welding quality control
Active Publication Date: 2018-07-13
河北岳泓智机科技开发有限公司
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Problems solved by technology
This method solves the problem of finding the relationship between the characteristics of the molten pool and the penetration shape in the case of asymmetric fillet weld welding, and can be effectively applied to the penetration quality control of asymmetric fillet weld welding
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[0040] Further describe the present invention below in conjunction with embodiment and accompanying drawing thereof:
[0041] Such as Figure 1 to Figure 17 as shown,
[0042]Visual sensing system: It consists of XVC-G CCD camera produced by Canada Xiris, image acquisition card and narrow-band filter with a center wavelength of 650mm. The captured images are directly transferred to the computer via the power injector.
[0043] Test conditions: For the asymmetric fillet weld welding test, Times TDW4000 pulse TIG welding machine is used, the non-filler TIG welding method is adopted, the power frequency is 2Hz, the base value current is 50A, the peak current is 180A, the test material is Q235, and the welding The speed is 3mm / s, and the shielding gas is Ar. The asymmetric fillet weld welding test piece is composed of a thick plate and a thin plate, the size of the thick plate is 170mm×50mm×6mm, and the size of the thin plate is 170mm×50mm×2mm. The welding torch angle β is def...
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The invention discloses an asymmetric fillet weld welding quality detecting method based on positive molten pool image features. A positive molten pool image for asymmetric fillet weld welding is collected through a CCD camera, aiming at the collected molten pool image features, the outline of the positive molten pool image and the position of a welding gun at the molten pool image are obtained through a researchful image processing algorithm, through comprehensive analysis of the shifting rule of the welding gun at a molten pool and the fusion form of a postwelding test piece, when the included angle between the welding gun and a thick plate becomes larger, the parent material melting degrees of the thick plate side and the thin plate side of a fillet weld are different, the position of the welding gun relative to the center of the molten pool shifts towards one side of a thin plate, the relation between the shifting amount and the fusion form is built on the basis of the shifting amount, and accordingly control over the welding quality is achieved.
Description
technical field [0001] The invention belongs to the field of intelligent welding technology, relates to welding automation control, in particular to a method for detecting the welding quality of asymmetric fillet welds based on the image features of the front molten pool, specifically a method for welding asymmetric fillet welds By observing the characteristics of the front molten pool and detecting the position of the welding torch in the molten pool, the penetration shape is judged, and the welding quality is improved. Background technique [0002] In the load-bearing box girder members of bridges, ships, construction machinery, etc., there are many asymmetric fillet welds with unequal thickness formed by unilateral V-shaped grooves. Compared with the symmetrical weld with relatively simple structure, this kind of asymmetric fillet weld has a large difference in heat dissipation due to the different thickness of the two sides of the plate, and the shape of the weld is diff...
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Login to View More IPC IPC(8): B23K9/095B23K9/32
CPCB23K9/0953B23K9/32
Inventor 李亮玉岳建锋常玉烁郭瑞
Owner 河北岳泓智机科技开发有限公司