Narrow gap welding line grinding and repairing machine

Abstract

The invention relates to a narrow gap welding line grinding and repairing machine. The narrow gap welding line grinding and repairing machine comprises a grinding and repairing base, a drive motor arranged on the grinding and repairing base, a drive and driven mechanism connected with the drive motor in a matched manner, and a grinding wheel disc connected with the drive and driven mechanism in a matched manner and driven by the drive and driven mechanism to work. Accordingly, the narrow gap welding line grinding and repairing machine has the following beneficial effects that firstly, the narrow gap welding line grinding and repairing machine can stretch into a very narrow narrow-gap welding groove with any welding line depth, and accurate-position grinding excavation is conducted on a welding line part with a welding defect needing to be overcome; secondly, due to very-thin layer-by-layer grinding, the welding defect can be accurately overcome, and meanwhile excessive overcoming and incomplete overcoming are not generated; thirdly, no metallographic structure changing is generated on the welding line not excavated, and it is extremely better guaranteed that the mechanical performance of an as-welded welding connector meets the bearing requirement; fourthly, repairing construction is easier and more convenient, an arc welding power source, compressed air and other complex construction conditions are not needed, and only a 220 V small-power power source is needed; and fifthly, the repairing efficiency is high, and the repairing cost is far lower than that of the carbon arc gouging repairing technology.

Description

technical field [0001] The invention relates to a grinding machine for narrow-gap welding seams, which belongs to the field of auxiliary equipment for welding technology. Background technique [0002] Narrow gap arc welding technology is a welding technology with higher welding productivity, higher welded joint quality and lower welding production cost in arc welding technology. Since the 1980s, it has been applied in the industrial field for more than 30 years. . As a more advanced and high-end narrow gap arc welding technology in arc welding technology, it should replace traditional arc welding technology in a larger area and a larger proportion. However, looking at the application status of narrow gap arc welding technology in the world, the result is more advanced arc welding. There is a serious asymmetry in the speed and breadth of the technology and the replacement of the relatively backward arc welding technology, that is, the application range of the narrow gap arc ...

AI Technical Summary

Problems solved by technology

As a more advanced and high-end narrow gap arc welding technology in arc welding technology, it should replace traditional arc welding technology in a larger area and a larger proportion. However, looking at the application status of narrow gap arc welding technology in the world, the result is more advanced arc welding. There is a serious asymmetry in the speed and breadth of the technology and the replacement of the relatively backward arc welding technology, that is, the application range of the narrow gap arc welding technology should be very wide, and it should cover all equipment manufacturing fields, but the actual application ratio is very small. Not widely, according to incomplete traditional calculations, based on 100 applicable manufacturing enterprises, less than 10% of enterprises actually apply it

Investigating the reason, it can be completely ruled out that the narrow gap arc welding technology does not have greater technological progress than the traditional arc welding technology. There are actually two reasons. One is the invented narrow gap submerged arc welding technology, narrow gap argon tungsten arc Welding technology and narrow gap gas shielded welding technology still have the characteristics of not having leapfrog technological progress, or the invented technology still has certain shortcomings; another reason is that in the production process of deep and narrow narrow gap welding, It is impossible for all kinds of repairable welding defects (such as air holes, severe undercut, non-metallic inclusions, lack of fusion, etc.) Defects are helpless, and there is no countermeasure except for the carbon arc to fall off. This may be the key reason why most manufacturing companies would rather not use it than choose "not easy to use"

However, there are two significant disadvantages in digging out welding defects by the carbon-arc-gas method. The second is that there is a serious oxidized and nitrided layer on the surface of the welded seam after shoveling, and there is no way to remove the oxidized and nitrided layer under the existing technology, leaving serious troubles for the consistency of the mechanical properties of the welded seam after repair welding

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