Welding positioning tool for box girder cantilever crane

Abstract

The invention discloses a welding positioning tool for a box girder cantilever crane. The welding positioning tool for the box girder cantilever crane comprises a bottom frame, a positioning frame, a dragging trolley, a core support and a pressing mechanism, wherein a first tack is arranged on the bottom frame; the positioning frame is fixed on the bottom frame, and positioning pieces can position a bottom plate and at least one side plate of the box girder cantilever crane; the dragging trolley can move along the first track; the core support is used for supporting the inner wall of the box girder cantilever crane, a plurality of telescopic protrusions are distributed on the core support in the length direction of the core support, and the telescopic protrusions can stretch out to abut against the inner wall of the box girder cantilever crane or retract to be separated from the inner wall of the box girder cantilever crane; and the pressing mechanism is arranged on the bottom frame, and the pressing mechanism can press a top plate of the box girder cantilever crane and a side plate which does not abut against the positioning piece. By means of the structural design of the welding positioning tool for the box girder cantilever crane, the problems that after welding is completed, an inner support is difficult to remove, and skip welding is difficult in positioning can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a welding positioning tool for a box girder jib. Background technique [0002] In construction machinery, booms are widely used. For box-shaped booms, the requirements are higher in the production process, so that the finished boom has a high flatness, straightness, and high-precision shape. For the long box boom, the key is to prevent it from twisting and deforming during the welding process. In order to prevent large deformation and affect the quality of the boom, the industry usually adopts a rigid fixing method, that is, a support tool is placed in the boom, and a segmented The jump welding method is used to weld the boom parts. However, in the actual processing process, it is easy to appear difficult to remove the inner support tooling and difficult to locate the jump welding. Contents of the invention [0003] In view of this, the object of the present inv...

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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a welding positioning tool for the box girder jib. The structural design of the welding positioning tool for the box girder jib can effectively solve the difficult removal of the inner support and the difficult positioning of the jump welding after welding. The problem

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