Backing plate device

Abstract

The invention provides a backing plate device used for a single-side welding equipment, wherein steel plates are welded with each other by welding flux.The full length of the backing plate device is equipped with a first backing plate member and a second backing plate member with a length greater than that of the welding nozzle part (M) of the welding steel plate.The first backing plate member comprises a copperplate of the backing plate arranged along the welding nozzle part for holding the welding flux and a bearing support for supporting the copperplate of the backing plate and enabling the copperplate to slide along the welding nozzle part.A plurality of copper sheets with a predetermined length are connected with each other by connecting pieces to form the copperplate of the backing plate.The second backing plate member is equipped with a groove frame arranged along the welding nozzle part (M) and a groove fixed to the groove frame for holding the welding flux.By adopting the above structure, the good welding shape during the single-side automatic welding can be obtained.

Description

technical field [0001] The present invention relates to a backing device for abutting a backing member against the back surface of a welded groove when performing single-side automatic welding along a welded groove of a temporarily positioned steel plate to be welded. Background technique [0002] Generally, since steel plates used in ships and the like require a large steel plate area, they are formed by splicing steel plates of a certain size together by welding. The single-side welding device used in the above-mentioned welding operation of the steel plate includes a backing device for abutting a backing member from the back surface of the steel plate along the welding groove portion of the temporarily positioned steel plate to be welded. [0003] For example, the single-side welding device described in JP-A-2005-319512 is provided with a flux backing type first backing plate device and a flux covering backing for abutting the flux against the back side of the welding gro...

AI Technical Summary

Problems solved by technology

The problem with this backing plate device is that the structure of supporting the grooved belt with vertical rollers is complicated, and the grooved belt is easily damaged.

[0014] Grooved belts cannot maintain their normal shape when their vertical rollers fail

As a result, the gap between the grooved strip and the steel plate to be welded is deviated, and the close contact state of the backing flux generated by the grooved strip to the back of the welded steel plate is also deviated, and the backing flux is pressed against the extrusion force of the welded steel plate. Weakened, the backing flux cannot firmly rest against the back of the weld groove

[0015] Thus, there is a problem in existing backing plate devices that a good weld back bead shape cannot be obtained

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