Near-infrared vision sensing and penetration control device and method for double-sided double-arc vertical welding

Abstract

The invention discloses a device and method for double-faced double-arc vertical welding near-infrared vision sensing and penetration control. The device and method are particularly suitable for online penetration control in the double-faced double-arc welding process of spiral pipes made of aluminum alloy, or high-strength steel, or stainless steel or titanium alloy and the like, and further is suitable for online penetration control in the on-site butt-joint vertical welding process of ships, oil storage tanks, nuclear power containers and the like. According to the device and method, vertical welding molten pool vision images are detected in real time in a double-faced mode, through image processing and penetration characteristic parameter extraction, information of the double-faced double-arc vertical welding root penetration process is obtained, a control model of root penetration is set up, welding currents, welding gun swing width, welding speed and other technological parameters are automatically adjusted, the welding root is controlled to be totally penetrated, and double-faced double-arc welding quality is guaranteed.

Description

technical field [0001] The invention relates to an arc welding penetration control method, in particular to a near-infrared vision sensing and penetration control device and method for double-sided double-arc vertical welding. Background technique [0002] The welding production of aluminum alloy, low-alloy high-strength steel and other spiral pipes is made by uncoiling, leveling, trimming, forming, compacting, welding, rounding and other processes through the spiral pipe production line to form spiral pipes. The welding process is The key technology of spiral pipe manufacturing, the welding quality, especially the "penetration" quality directly determines the mechanical properties of the welded joint of the spiral pipe, and determines the bearing capacity of the spiral pipe. [0003] At present, submerged arc welding technology is generally used for steel spiral pipes, relying on double-sided welding to ensure penetration, neither visual sensing nor penetration control tech...

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Problems solved by technology

[0004] Double-sided double-arc welding double-sided, double-arc synchronous simultaneous heating, forming a common molten pool, many factors affecting the welding process, complex process, insufficient welding heat input or inaccurate heating position, the root of the groove will not be fused, resulting in unsatisfactory Penetration affects the bearing capacity of the joint, excessive welding heat input, burn-through at the root of the groove, resulting in weld penetration defects of the weld joint, welding failure, detection of penetration information during the welding process, online adjustment of process parameters to ensure double-sided double-arc penetration quality , is an important technical method for vertical welding of spiral pipes and ship hulls

But there is no relevant description in the prior art

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