Process method for section-increased cantilever crane body assembly positioning welding

Abstract

The invention provides a head and tail-type rotatable positioner tool with a lifting platform, and a process method for section-increased cantilever crane body assembly positioning welding adopting the tool. In the method, the lifting platform and the head and tail-type rotatable positioner are adopted; the assembly positioning welding of an overall section-increased cantilever crane body is finished in limited ground space, which saves fussy operations of welding piece by piece and assembling finally in conventional welding; simultaneously, the welding of all ventral tubes is performed on a horizontal plane, which saves a trouble in lineation vertical assembly in the conventional welding; moreover, the welding process of the overall positioning welding is finished under the restriction of a tool, which effectively avoids cantilever crane distortion and welding distortion caused by overturning; and therefore, the welding quality and the welding efficiency of the section-increased cantilever crane body are improved fundamentally.

Description

technical field [0001] The invention relates to a welding process method for tack welding, in particular to a process method for assembling tack welding of a jib frame body. Background technique [0002] In the prior art, the welding process of the positioning welding for the assembly of the extended section boom body of the crane usually adopts the steps of first welding each component separately, and then assembling, welding and forming, such as Figure 1-Figure 4 shown. Specifically, in figure 1 , first place the two main chords 1 on the processing platform 2; then, in figure 2 In , the web tube 3 is assembled between the two main chords 1, and tack welding is performed to form the important part "piece" of the jib body; then, as image 3 in, will figure 2 The two groups of "sheets" welded in the process are fixed on the square tooling 4 in upper and lower layers, and along the vertical direction, a web tube 5 is installed between the two groups of "sheets", and tac...

AI Technical Summary

Problems solved by technology

[0003] However, the positioning welding of the above-mentioned crane extension jib body assembly is cumbersome and the welding efficiency is low, and the overturning operation of the jib during the welding process can easily cause deformation of the jib and welding, which directly affects the entire augmentation. The overall performance of the jib frame

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