Welding method for TKY joints of steel structure

A welding method and steel structure technology, applied in welding equipment, gas flame welding equipment, metal processing equipment, etc., to achieve the effects of reducing production costs, reducing cutting deformation, and ensuring consistency

Active Publication Date: 2018-08-28
上海拓直数字科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a welding method for TKY joints of steel structures in view of the defects in the prior art. The welding method of the present invention is easy to operate and can ensure that the mechanical properties such as fatigue strength of TKY joints are up to standard, and one-time welding is formed to avoid Grind the weld many times to obtain the required joint fatigue strength, and it is not easy to cause root defects, effectively reduce the weld grinding, reduce the labor intensity and production cost of workers, and improve production efficiency

Method used

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  • Welding method for TKY joints of steel structure
  • Welding method for TKY joints of steel structure
  • Welding method for TKY joints of steel structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] like figure 1 and Figure 5 shown, where figure 1 The flow chart of the welding method of the steel structure TKY node provided by the present invention comprises the following steps:

[0055] Step S100: According to the thickness and material of the branch pipe 2 and the main pipe 1 to be welded, a simulation experiment of a 1:1 example intersecting line cutting process is carried out;

[0056] Step S200: Carry out intersecting line cutting on the branch pipe 2, and cut out intersecting lines and bevels;

[0057] Step S300: pairing and positioning the branch pipe 2 and the main pipe 1;

[0058] Step S400: use a ruler tangent to the outer surface of the branch pipe 2 and extend toward the main pipe 1 to draw the end line of the weld edge of the TKY node;

[0059] Step S500: Perform backing welding on the root of the groove to form a backing layer; taking the intersecting hole as a reference, the starting point of the backing welding is between 5:30 and 6:30. The ar...

Embodiment 2

[0073] The welding method of the steel structure TKY node of this embodiment is basically the same as that of Embodiment 1, as Figure 5 As shown, the steel structure TKY node in this embodiment is a Y-shaped node, such as Figure 4 to Figure 9 As shown, it is a schematic diagram of each area of ​​the steel structure TKY node in this embodiment and its corresponding welding situation. The above-mentioned welding method of the steel structure TKY node is used for single-sided welding and double-sided forming, which specifically includes the following steps:

[0074] Step S100: According to the thickness and material of the branch pipe 2 and the main pipe 1 to be welded, a simulation experiment of the intersecting line cutting process of a 1:1 example is carried out to determine the cutting parameters and cutting allowance; The specification requires preheating. The amount of preheating will directly affect the shape and accuracy of the intersecting line incision. Therefore, a 1...

Embodiment 3

[0092] The welding method of the steel structure TKY node of this embodiment is basically the same as that of Embodiment 2, the difference is that the steel structure TKY node welded in this embodiment is a K-shaped node, such as figure 2 shown.

[0093] Of course, without loss of generality, the welding method of steel structure TKY joints provided by the present invention can also be applied to other types of joint welding, and the corresponding welding parameters can be adjusted according to the materials and sizes of materials used in different steel structures, and better results can also be obtained. welding effect.

[0094] Compared with prior art, the present invention has following advantage:

[0095] 1. The welding method of the steel structure TKY joint of the present invention is easy to operate, one-time welding is formed, the weld seam and the base metal are smoothly transitioned, the grinding of the weld seam is reduced, and the fatigue strength and other mech...

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Abstract

The invention discloses a welding method for TKY joints of a steel structure. The welding method includes the following steps that firstly, a 1: 1 example intersecting line cutting simulation test isperformed; secondly, intersecting line cutting is performed; thirdly, fitting up and positioning are performed; fourthly, weld joint edge terminated lines of the TKY joints are drawn; fifthly, backingwelding is performed to form a bottoming layer; sixthly, filling welding is performed to form a filling layer; and seventhly, surface covering welding is performed to form a surface covering layer, current of a welding device is decreased into the range of 100-130 A, welding stops when the distance from welding to a groove edge line is 0.3 mm to 2 mm, then from the weld joint edge terminated lines, arranging and welding are sequentially in transition to the groove edge of a branch pipe, and a surface covering layer weld joint and parent metal are made to be in smooth transition. The welding method guarantees that the fatigue strength and other mechanical performance of the TKY joints reach standards, one-time welding forming is performed, root portion defects are not likely to be caused,weld joint grinding is reduced, the labor intensity of workers and the production cost are lowered, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for TKY nodes of a steel structure. Background technique [0002] Due to its advantages of high strength, good toughness, high rigidity, small footprint, and beautiful appearance, steel structures have been widely used in the fields of construction, mining machinery, military engineering, and marine engineering. In some steel structure buildings, tubular joints are often used, especially tubular joints in the form of TKY. For example, the exploitation of deep-sea oil requires the establishment of a large number of offshore platforms. Offshore platforms are the most commonly used structural forms in the exploitation of offshore oil and gas resources. The jacket as the basis of this platform form is a space formed by intersecting and welded steel pipes. Truss structure, large pipe intersection joint (TKY joint) is its most important welding structure, its pipe jo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K7/00B23K7/10
CPCB23K7/00B23K7/10
Inventor 宋宪磊朱海洋
Owner 上海拓直数字科技有限公司
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