Threaded hole thin-wall repair welding method

Abstract

The invention discloses a threaded hole thin-wall repair welding method. The threaded hole thin-wall repair welding method comprises the steps that a threaded hole is formed in a workpiece, one side wall of the workpiece is a thin wall with the thickness smaller than that of the threaded hole, a bolt is screwed into the threaded hole, a welding bead is welded from one end to the other end of the thin wall of the workpiece in the direction perpendicular to the axial direction of the bolt through an intermittent spot welding cladding welding method, a plurality of continuous welding beads are sequentially welded in the axial direction of the bolt to form a welding face fully paved with a thin wall, and the thin wall of the threaded hole is subjected to repair welding thickening so that the thickness of the wall of the threaded hole meets the use requirement, meanwhile, completeness of the threaded hole and a thin-wall structure can be protected in the repair welding process, and the threaded hole is tightly connected with the bolt during threaded connection. The scheme is high in operability.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a threaded hole thin-wall repair welding method. Background technique [0002] In the prior art, many mechanical parts are spliced ​​and assembled through threaded connections to form a device that can operate normally. However, due to the thinning of the outer wall of the worn threaded hole, the stability of the connection structure is affected, and the larger the device If there is a disconnection between two parts due to damage to the outer wall of the threaded hole, it is easy to cause danger, and many threaded holes are opened near the edge or corner of the part, and the walls on one or more sides are very thin. After wear and tear, the strength of the threaded connection cannot meet the requirements of use, and it is easier to make the threaded connection disconnected. [0003] Therefore, it is necessary to thicken the wall of the threaded hole. In the prior ar...

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Problems solved by technology

[0002] In the prior art, many mechanical parts are spliced ​​and assembled through threaded connections to form a device that can operate normally. However, due to the thinning of the outer wall of the worn threaded hole, the stability of the connection structure is affected, and the larger the device If there is a disconnection between two parts due to damage to the outer wall of the threaded hole, it is easy to cause danger, and many threaded holes are opened near the edge or corner of the part, and the walls on one or more sides are very thin. After wear and tear, the strength of the threaded connection cannot meet the needs of use, and it is easier to disconnect the threaded connection

[0003] Therefore, it is necessary to thicken the wall of the threaded hole. In the prior art, linear welding or intermittent welding is usually used to thicken the wall of the threaded hole. However, due to the excessive heat input of these two welding methods Large, it is easy to cause the thread structure in the threaded hole to be damaged or the wall of the threaded hole to melt through. Although the thin wall of the threaded hole is thickened, the threaded hole structure is damaged and cannot meet the needs of use, and it is impossible to realize the parts. The effect of stable connection between

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