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Field Assembly and Welding Method of Large I-shaped Crane Beam

A welding method and crane beam technology, applied in welding equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as difficult to guarantee welding quality, poor appearance, large welding deformation, etc. The hydrogen content is easy to control and the effect of welding stress is small

Active Publication Date: 2018-12-07
MCC TIANGONG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This welding method requires overhead welding when welding the bottom surface. After the welding is completed, it needs to be cleaned from the top. It is difficult to weld the bottom surface when welding the bottom surface. defect
Welding quality is not easy to guarantee, even rework

Method used

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  • Field Assembly and Welding Method of Large I-shaped Crane Beam
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  • Field Assembly and Welding Method of Large I-shaped Crane Beam

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Embodiment Construction

[0037] The on-site assembly and welding method of the large I-shaped crane beam of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] In one embodiment of the invention, the following tools are used:

[0039] 1. Connect the positioning adjustment device: see Figure 1a and Figure 1b , the role of the device is to ensure the adjustment of the flatness of the large-scale component butt joint and the control of the weld width during welding. Its production method is as follows:

[0040] Prepare 8 sections of angle steel 11 with a length of 300 mm and a length of 140 mm×10 mm. On the angle steel legs of each section of angle steel 11, drill 3 bolt holes at intervals along the length direction with a distance of 100 mm. The distance between the first bolt hole and the end face of the angle steel is 50 mm. , the distance between the second bolt hole and the end face of the angle steel is 150mm, and so on;

[0041] Then...

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Abstract

The invention discloses an on-site assembling and welding method of large-scale I-shaped crane beams. The method comprises the steps that (1) connecting and positioning adjusting devices are manufactured; (2) subgrade boxes are manufactured to erect a splitting and assembling platform; (3) the large-scale crane beams are manufactured section by section and then pre-assembled, setting-out is conducted to determine the positions of the connecting and positioning adjusting devices, and one pair of the connecting and positioning adjusting devices is welded to each side of the butt-joint position of every two adjacent webs; (4) operation pits for splitting construction are dug in the member splitting positions of a hoisting site; (5) the splitting and assembling platform is erected; and (6) on-site splitting is conducted. According to the method, the assembling adjusting devices are easy to manufacture, high in turnover rate, high in control precision, easy and convenient to install and operate and high in applicability; members are welded through the front sides, the double sides of the members are formed at a time, weld joints in the back sides are fully-formed, and welding traces are orderly; and the construction period is short, labor is saved, the construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the field of on-site assembly and welding of large steel structure parts, in particular to a method for on-site assembly and welding of large I-shaped crane girders. Background technique [0002] With the rapid development of steel rolling technology in my country and the improvement of steel properties, steel structure workshops with large column spacing and large space have been widely used in recent years. [0003] The existing on-site assembly method of large-scale crane girders is as follows: after the crane beams are transported into the site in sections, they are placed on the assembly platform built by H-shaped steel, and then the crane girders are adjusted with chains, jacks, and wedges for assembly. The existing assembled platform has uneven force, poor stability, difficult to control the flatness, and difficult fine-tuning operation, low construction efficiency, large cost investment, long cycle time, and difficult t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/235B23K9/02
CPCB23K9/02B23K9/16B23K9/235
Inventor 张未东王治国张怀龙杨志刚杨法言张斌张洪江孔令飞
Owner MCC TIANGONG GROUP
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