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Thick Section Narrow Gap T-Type Welding Method

A welding method and narrow gap technology, applied in the direction of welding equipment, welding accessories, welding rod characteristics, etc., can solve the problems of difficult weld bead planning, irregular weld bead, and lack of fusion between passes, so as to simplify weld bead planning and reduce Welding volume, the effect of avoiding non-fusion between weld passes

Active Publication Date: 2021-06-18
DONGFANG ELECTRIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the defects and deficiencies in the above-mentioned prior art, the present invention provides a T-shaped welding method with thick section and narrow gap. As a result, the weld bead is irregular and the weld bead planning is difficult, and when multi-layer and multi-pass welding, it is easy to form the problem of non-fusion between passes

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Examples

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Embodiment 1

[0058] As a preferred embodiment of the present invention, this embodiment discloses:

[0059] Thick-section narrow-gap T-type welding method is characterized in that: comprising the following steps:

[0060] Groove design steps: process the special-shaped thick plate within 60mm above the welding end into a rectangular structure, the width of the rectangular structure is not less than the maximum width of the special-shaped thick plate 1; the welding surface of the rectangular structure is an oblique welding surface 4 with a certain slope , forming a Type I narrow gap groove structure, the gap between the root of the Type I narrow gap groove and the planar thick plate 2 is less than 16mm, and the gap between the upper end of the Type I narrow gap groove and the planar thick plate 2 is less than 20mm ; Open a conventional K-shaped bevel at both ends of the special-shaped thick plate 1 with a certain length, and leave a certain gap between the K-shaped bevel and the I-like narr...

Embodiment 2

[0067] As another preferred embodiment of the present invention, with reference to the attached Figure 1-6 , this example discloses:

[0068] Thick-section narrow-gap T-type welding method is characterized in that: comprising the following steps:

[0069] Groove design steps: process the special-shaped thick plate within 60mm above the welding end into a rectangular structure, the width of the rectangular structure is not less than the maximum width of the special-shaped thick plate 1; the welding surface of the rectangular structure is an oblique welding surface 4 with a certain slope , forming a Type I narrow gap groove structure, the gap between the root of the Type I narrow gap groove and the planar thick plate 2 is less than 16mm, and the gap between the upper end of the Type I narrow gap groove and the planar thick plate 2 is less than 20mm ; Open a conventional K-shaped bevel at both ends of the special-shaped thick plate 1 with a certain length, and leave a certain g...

Embodiment 3

[0076] As another preferred embodiment of the present invention, with reference to the attached Figure 1-11 , this example discloses:

[0077] The use of welding robots 113 is the direction of the future manufacturing industry. For robot welding of special-shaped structural thick plates and ultra-thick plates, it is necessary to improve the welding quality and efficiency of arc welding robots. Therefore, by changing the welding structure of the product, we change the welding groove of the thick plate and the ultra-thick plate, and carry the new welding technology on the arc welding robot to reduce the welding amount of the ultra-thick section structural parts, thereby increasing the welding efficiency of the arc welding robot , opened up a new field of intelligent welding of arc welding robots in the hydropower industry of power generation equipment.

[0078] Narrow gap gas shielded welding welding technology is a new type of welding technology, which mainly has the followi...

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Abstract

The invention discloses a thick-section narrow-gap T-shaped welding method, and relates to the technical field of production and manufacturing of thick plate and ultra-thick plate welding in the hydropower industry. The present invention firstly changes the butt joint groove between the special-shaped thick plate and the plane thick plate, that is, processes it into a rectangular structure within 60mm above the welding end of the special-shaped thick plate, and changes the arc-shaped weld bead into a straight weld bead, which can Simplify the welding trajectory of the robot and reduce the difficulty of programming. The welding surface of the rectangular structure is set as a beveled welding surface with a certain slope, and the welding groove between the special-shaped thick plate and the flat thick plate is designed as an I-shaped narrow gap groove structure. The original multi-layer and multi-pass welding is changed to one layer and one, which simplifies the welding process, reduces the probability of non-fusion between weld beads and the number of weld bead cleaning, and improves welding efficiency.

Description

technical field [0001] The invention relates to the production and manufacturing technical field of welding thick plates and ultra-thick plates in the hydropower industry, and more specifically relates to a T-shaped welding method with thick sections and narrow gaps. Background technique [0002] Thick plate and ultra-thick plate structures are widely used in the hydropower manufacturing industry. The welding joints of thick plates mainly include butt joints and T-joints. The traditional welding method of T-joint joints generally uses K-shaped grooves on the workpiece for multi-layer and multi-pass MAG welding. With the continuous increase of the thickness of the welded structure, the groove area of ​​the thick plate increases sharply, resulting in a multiplied increase in the amount of welding work, low production efficiency, and poor fusion during multi-layer and multi-pass welding. [0003] Since robot welding can greatly improve the stability of welding quality, the appl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/235B23K9/26B23K9/28B23K9/12B23K9/32B23K9/02
CPCB23K9/0213B23K9/12B23K9/173B23K9/235B23K9/26B23K9/28B23K9/32
Inventor 金宝钟磊郭中才范潇姚文选付永贵王平林松彭谢宜
Owner DONGFANG ELECTRIC MACHINERY
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