Detection system for welding lines and detection method used by detection system for welding lines

Abstract

The invention discloses a detection system for welding lines. The detection system is used for detecting the welding lines in a linear closed space and comprises a moving platform and a detection device which is arranged on the moving platform; the detection device comprises a polishing device, a magnetic powder flaw detection device and a camera; the moving platform can enter the closed space; the polishing device is used for polishing the welding lines in the closed space; the magnetic powder flaw detection device is used for performing magnetic powder flaw detection on the welding lines after polishing; and the camera is used for collecting images of the magnetic powder flaw detection process of the welding lines. For the detection system, aiming at structural features of the linear closed space, a brand-new detection manner is adopted, the detection system can enter the closed space for welding line detection; the detection process is transmitted by image collection, so that the qualified and unqualified conditions of the welding lines can be judged in a visualized manner; and the operation is convenient, the detection speed is high, and the efficiency is high. The invention also discloses a detection method used by the detection system for the welding lines.

Description

technical field [0001] The invention relates to the technical field of weld detection, in particular to a detection system and method for a weld. Background technique [0002] Steel box girder is an important part of bridge load-bearing structure, mainly used to provide support and avoid bridge deformation. The steel box girder generally includes structures such as a top plate and a bottom plate, and the top plate and the bottom plate are generally welded by U ribs and the bottom plate. [0003] At present, the fillet welds between the U ribs of the steel box girder and the bottom plate are all welded on one side externally. When welding from the outside, in order to achieve the penetration depth required by the design, the outer side of the U rib is usually grooved or welded with a high current. When high-current welding is used, the stability of the current, voltage and welding speed in the welding process directly affects the welding quality, and it is difficult to guar...

AI Technical Summary

Problems solved by technology

When high-current welding is used, the stability of the current, voltage and welding speed in the welding process directly affects the welding quality, and it is difficult to guarantee the welding quality; The gap is difficult to be consistent, which will directly affect the welding quality

[0004] The above-mentioned welding methods often cause various defects such as incomplete penetration, infusion, weld bumps, and penetration depths in the U rib, which make the U rib prone to open defects and seriously affect the strength of the weld.

[0005] In order to improve the weld seam quality of the U rib, an improved way is to perform double-sided welding on the inside and outside of the U rib. Due to the small structural space inside the U rib, it is difficult to detect the weld inside the U rib; similar Yes, it is currently impossible to detect welds inside linear enclosed spaces

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