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Submerged-arc welding deep penetration single-side welding technology of thick plates

A single-sided welding and submerged arc welding technology, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of many welding passes, low welding efficiency and large amount of welding consumables in manual working hours, so as to reduce labor and welding costs. The effect of material cost, improvement of welding efficiency, and less welding materials

Active Publication Date: 2017-02-22
武汉天高熔接股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this kind of process welding has low welding efficiency and takes a lot of time, which is mainly manifested in the long man-hours and many welding passes.
On the other hand, due to the large groove, the amount of welding consumables is large

Method used

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  • Submerged-arc welding deep penetration single-side welding technology of thick plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Welding steel plates with a thickness of 35mm or less includes the following steps:

[0048] S1, cutting the groove of the steel plate to be welded;

[0049] S2. Splicing two steel plates with grooves with V-shaped grooves and fixing them on the backing plate, the included angle of the V-shaped grooves is 45°, and the gap between the bottoms of the two grooves is 0-5mm;

[0050] S3, fixed-point welding in the groove, the distance between adjacent fixed points is 1m, and the length of each fixed point is 50mm;

[0051] S4. Welding with double welding wire matching sintering flux technology, the diameter of any welding wire is 5mm, the front welding wire and the rear welding wire are arranged along the welding direction, the angle between the front welding wire and the backing plate is 75°, the front welding wire The vertical distance between the welding wire and the backing plate is 35cm, the front welding wire is welded by direct current, the current of the direct curr...

Embodiment 2

[0053] Welding a steel plate with a thickness of 40mm includes the following steps:

[0054]S1, cutting the groove of the steel plate to be welded;

[0055] S2. Splicing two steel plates with grooves with V-shaped grooves and fixing them on the backing plate, the included angle of the V-shaped grooves is 45°, and the gap between the bottoms of the two grooves is 0-5mm;

[0056] S3, fixed-point welding in the groove, the distance between adjacent fixed points is 1m, and the length of each fixed point is 50mm;

[0057] S4, welding is carried out by adopting the process of double welding wire matching sintering flux, the diameter of any welding wire is 6.4mm, and the front welding wire and the rear welding wire are arranged along the welding direction, and the angle between the front welding wire and the backing plate is 75°, the described The vertical distance between the front welding wire and the backing plate is 35cm, and the front welding wire is welded by direct current. T...

Embodiment 3

[0063] Welding a steel plate with a thickness of 50mm includes the following steps:

[0064] S1, cutting the groove of the steel plate to be welded;

[0065] S2. Splicing two steel plates with grooves with V-shaped grooves and fixing them on the backing plate, the included angle of the V-shaped grooves is 45°, and the gap between the bottoms of the two grooves is 0-5mm;

[0066] S3, fixed-point welding in the groove, the distance between adjacent fixed points is 1m, and the length of each fixed point is 50mm;

[0067] S4, welding is carried out by adopting the process of double welding wire matching sintering flux, the diameter of any welding wire is 6.4mm, and the front welding wire and the rear welding wire are arranged along the welding direction, and the angle between the front welding wire and the backing plate is 75°, the described The vertical distance between the front welding wire and the backing plate is 35cm, the front welding wire is welded by direct current, the ...

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Abstract

The invention discloses a submerged-arc welding deep penetration single-side welding technology of thick plates. The technology comprises the steps of cutting notches in to-be-welded steel plates; splicing the two steel plates with the notches through adopting the V-shaped notches, and fixing the two steel plates to a liner plate, wherein an included angle of the two notches is 45 degrees, and a clearance of the bottoms of the two notches is 0 to 5 mm; carrying out fixed point welding inside the notches, wherein the interval between adjacent fixed points is 1 m, and the length of the fixed points is 50 mm; welding steel plates of which the thickness is smaller than 35 mm and the thickness is 35 to 70 mm through adopting a double-welding wire matched sintered flux technology, and welding steel plates of which the thickness is 70 to 100 mm through adopting a three-welding wire matched sintered flux and backing flux technology. According to the submerged-arc welding deep penetration single-side welding technology, the consumed time is short, the utilized welding materials are few, the welding efficiency can be greatly improved, and the labor and material cost is reduced.

Description

technical field [0001] The invention relates to the field of thick plate welding. More specifically, the present invention relates to a thick plate submerged arc welding deep penetration single-side welding process. Background technique [0002] At present, in the large-scale steel structure heavy industry, improving efficiency and reducing costs are consistent goals. In major steel structure heavy industry industries in China, multi-layer and multi-pass welding is mostly used to open large grooves in the welding of large and thick plates. On the one hand, this welding process has low welding efficiency and takes a lot of time, which is mainly manifested in the long man-hours and many welding passes. On the other hand, due to the large groove, the amount of welding materials used is large. Contents of the invention [0003] It is an object of the present invention to solve at least the above-mentioned problems and to provide at least the advantages which will be describ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/18B23K35/362
Inventor 屠涛雄汪小根李华胡文喜易武强
Owner 武汉天高熔接股份有限公司
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