Double-wire pulsed welding melten pool bidirectional near-infrared synchronous vision sensing method and device

Abstract

The invention discloses a double-wire pulsed welding melten pool bidirectional near-infrared synchronous vision sensing method and device. The method is as follows: the light of electric arcs reflected by the melten pool and the radiation light of the melten pool are used as the light source; the near-infrared technology and the CCD vision sensor parameter adjusting devices are used to obviously reduce the twin-arc light intensity; the simultaneous display of the images of the back and side bidirectional melten pool and the data storage are completed through the bidirectional melten pool simultaneous same-image collection and storage method based on VC++ and OpenCV; and characteristic information reflecting the welding quality can be obtained through digital image processing. The sensing device of the invention comprises two near-infrared CCD vision sensors, two near-infrared compound filter systems, two image acquisition cards, a computer, a bidirectional visual system assembling jig, two high-coaxiality near-infrared compound filter system assembling components and two CCD vision sensor parameter adjusting devices. The simultaneous same-image vision sensing of the double-wire pulsed MIG and MAG welding bidirectional melten pool of the same kind of metal or different kinds of metals such as light alloy, stainless steel, carbon steel, copper steel and aluminium magnesium alloycan be realized.

Description

technical field [0001] The invention relates to a visual sensing technology and sensing device for a molten pool of twin-wire pulse welding, which is especially suitable for the twin-wire pulse MIG and MAG welding process of light alloy, carbon steel, stainless steel, copper steel, aluminum magnesium, etc. Rear and side simultaneous melt pool vision sensing. Background technique [0002] At present, welding automation and intelligence have become the main development direction of welding technology. The core of welding intelligent control is to realize real-time detection and automatic adjustment control of welding process and quality. In order to improve the production quality and reduce the cost of post-welding treatment, and realize the real-time monitoring of the welding process quality and the management goal of "zero defect", the industrial sector puts forward urgent requirements for the process technology that can monitor and control the welding quality online. With...

AI Technical Summary

Problems solved by technology

Due to the high pulse frequency (usually above 100Hz) in the twin-wire pulse welding process, the more intense double-arc superimposed arc light and the special shape of the twin-wire welding molten pool (the molten pool is formed by the melting of the front and rear two wires, and the size is longer) Due to the particularity of the shape of the nozzle of the welding torch (the nozzle is large in size, it is easy to block the imaging window of the molten pool), the sensing method using the above visible light band filter cannot obtain a satisfactory image of the molten pool

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