CN112792428A - Forming process of U-shaped bent pipe - Google Patents
Forming process of U-shaped bent pipe Download PDFInfo
- Publication number
- CN112792428A CN112792428A CN202011613870.8A CN202011613870A CN112792428A CN 112792428 A CN112792428 A CN 112792428A CN 202011613870 A CN202011613870 A CN 202011613870A CN 112792428 A CN112792428 A CN 112792428A
- Authority
- CN
- China
- Prior art keywords
- welding
- side flap
- shaped bent
- bent pipe
- outer side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The invention discloses a forming process of a U-shaped bent pipe, which comprises the following steps: A) splitting: manufacturing an inner side flap and an outer side flap which are arranged in the radial direction of the U-shaped bent pipe, wherein the cross sections of the inner side flap and the outer side flap are semicircular, and two spliced seams of the inner side flap and the outer side flap are arranged on the longitudinal central section of the U-shaped bent pipe; B) assembling: butting and fixing two abutted seams of the inner side valve and the outer side valve; C) welding: arranging a cross arm main shaft of the submerged arc welding machine at the circle center of the U-shaped bent pipe, adjusting the position of a welding gun to enable the rotation track of the cross arm to be coincident with the spliced seam, positioning the welding gun right above the spliced seam, performing submerged arc automatic welding on the spliced seam on the upper side, turning over the inner side flap and the outer side flap, and performing submerged arc automatic welding on the spliced seam on the other side; the invention can adopt submerged arc automatic forming, can effectively improve the welding efficiency and the welding seam quality, and has good welding seam forming.
Description
Technical Field
The invention relates to a forming process of a U-shaped bent pipe, in particular to a forming process of a U-shaped bent pipe for a large hairpin type container.
Background
As shown in fig. 1 and 2, due to the particularity of the device structure, the hairpin type container is formed by welding a U-shaped bent pipe 7 at the tail part of the hairpin type container through two U-shaped bent pipes of a haversian; the existing two Harvard U-shaped bent pipes 7 are divided into two sections horizontally, the abutted seams 8 and 9 of the two sections are arranged on the horizontal central section of the U-shaped bent pipe and are respectively positioned on the radial innermost side and the outermost side of the U-shaped bent pipe 7 and limited by the appearance structure, during welding, the two abutted seams 8 and 9 of the two Harvard U-shaped bent pipes can only be vertical and welded by adopting shielded metal arc welding, and the welding seam quality is unstable, the welding efficiency is low and the welding seam molding is poor.
Disclosure of Invention
The invention aims to provide a forming process of a U-shaped bent pipe, which can adopt submerged arc automatic forming, can effectively improve the welding efficiency and the welding seam quality and has good welding seam forming.
In order to achieve the purpose, the forming process of the U-shaped bent pipe is characterized by comprising the following steps of: A) splitting: manufacturing an inner side flap and an outer side flap which are arranged in the radial direction of the U-shaped bent pipe, wherein the cross sections of the inner side flap and the outer side flap are semicircular, and two spliced seams of the inner side flap and the outer side flap are arranged on the longitudinal central section of the U-shaped bent pipe; B) assembling: butting and fixing two abutted seams of the inner side valve and the outer side valve; C) welding: arranging a cross arm main shaft of the submerged arc welding machine at the circle center of the U-shaped bent pipe, adjusting the position of a welding gun to enable the rotation track of the cross arm to be coincident with the spliced seam, positioning the welding gun right above the spliced seam, performing submerged arc automatic welding on the spliced seam on the upper side, turning over the inner side flap and the outer side flap, and performing submerged arc automatic welding on the spliced seam on the other side;
according to the invention, the U-shaped bent pipe is divided longitudinally, so that two abutted seams are positioned on the longitudinal central section of the U-shaped bent pipe, and the U-shaped bent pipe can be formed by adopting submerged automatic arc welding, thus the welding efficiency and the welding seam quality can be effectively improved, and the welding seam is formed well;
as a further improvement of the invention, in the step B), the inner flap and the outer flap are fixed by spot welding; the operation is convenient;
as a further improvement of the invention, grooves are arranged at the two splicing seams of the inner side petal and the outer side petal; the welding quality is improved;
in conclusion, the invention can adopt submerged arc automatic forming, can effectively improve the welding efficiency and the welding seam quality, and has good welding seam forming.
Drawings
Fig. 1 is a front view of a hairpin container.
Fig. 2 is a left side view of the U-bend of fig. 1.
FIG. 3 is a front view of an inner lobe in an embodiment of the present invention.
Fig. 4 is a sectional view taken along line a-a of fig. 3.
FIG. 5 is a front view of the outer flap in an embodiment of the present invention.
Fig. 6 is a cross-sectional view B-B of fig. 5.
FIG. 7 is a front view of the welding state of the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A forming process of a U-bend according to this embodiment, as shown in fig. 3 to 7, includes the following steps: A) splitting: manufacturing an inner side flap 1 and an outer side flap 2 which are arranged in the radial direction of the U-shaped bent pipe, wherein the cross sections of the inner side flap 1 and the outer side flap 2 are semicircular, two abutted seams 3 or 4 of the inner side flap 1 and the outer side flap 2 are arranged on the longitudinal central section of the U-shaped bent pipe, and grooves are formed in the two abutted seams 3 and 4; B) assembling: butting and spot-welding two abutted seams 3 and 4 of the inner side valve 1 and the outer side valve 2; C) welding: placing a cross arm main shaft 5 of a submerged arc welding machine at the center of a circle of a U-shaped bent pipe, adjusting the position of a welding gun 6 to enable the rotation track of a cross arm 7 to coincide with a spliced seam, positioning the welding gun 6 right above the spliced seam, performing submerged arc automatic welding on the upper side spliced seams 3 and 4, turning over an inner side flap 1 and an outer side flap 2, and performing submerged arc automatic welding on the spliced seam on the other side;
according to the invention, the U-shaped bent pipe is divided longitudinally, so that the two abutted seams 3 and 4 are positioned on the longitudinal central section of the U-shaped bent pipe, and the U-shaped bent pipe can be formed by adopting submerged automatic arc welding, thereby effectively improving the welding efficiency and the welding seam quality, and having good welding seam formation.
Claims (3)
1. A forming process of a U-shaped bent pipe is characterized by comprising the following steps: A) splitting: manufacturing an inner side flap and an outer side flap which are arranged in the radial direction of the U-shaped bent pipe, wherein the cross sections of the inner side flap and the outer side flap are semicircular, and two spliced seams of the inner side flap and the outer side flap are arranged on the longitudinal central section of the U-shaped bent pipe; B) assembling: butting and fixing two abutted seams of the inner side valve and the outer side valve; C) welding: and (3) placing a cross arm main shaft of the submerged arc welding machine at the center of the circle of the U-shaped bent pipe, adjusting the position of a welding gun to enable the rotation track of the cross arm to be coincident with the spliced seam, positioning the welding gun right above the spliced seam, performing submerged arc automatic welding on the spliced seam on the upper side, turning the inner side flap and the outer side flap, and performing submerged arc automatic welding on the spliced seam on the other side.
2. The forming process of a U-bend according to claim 1, wherein: and B), fixing the inner valve and the outer valve by spot welding.
3. The forming process of a U-bend according to claim 1 or 2, wherein: in the step A), grooves are formed at the two abutted seams of the inner side petal and the outer side petal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613870.8A CN112792428A (en) | 2020-12-31 | 2020-12-31 | Forming process of U-shaped bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613870.8A CN112792428A (en) | 2020-12-31 | 2020-12-31 | Forming process of U-shaped bent pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112792428A true CN112792428A (en) | 2021-05-14 |
Family
ID=75804631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011613870.8A Pending CN112792428A (en) | 2020-12-31 | 2020-12-31 | Forming process of U-shaped bent pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112792428A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489836A (en) * | 2011-12-07 | 2012-06-13 | 无锡汉神电气有限公司 | Device for automatically welding 90-degree large elbow |
| CN102699498A (en) * | 2012-06-01 | 2012-10-03 | 无锡市新峰管业股份有限公司 | Large submerged arc welding device for butt welding of bent pipes |
| CN202793096U (en) * | 2012-08-24 | 2013-03-13 | 风凯换热器制造(常州)有限公司 | Hairpin type heat exchanger |
| CN103406644A (en) * | 2013-08-20 | 2013-11-27 | 中国海洋石油总公司 | Submerged-arc welding process for longitudinal seam and circular seam welding of pipe sections |
| JP2014126311A (en) * | 2012-12-27 | 2014-07-07 | Orion Mach Co Ltd | Heat exchanger |
| CN106825875A (en) * | 2017-03-10 | 2017-06-13 | 广州增立钢管结构股份有限公司 | A kind of steel pipe vertical seam double-submerged arc technique |
-
2020
- 2020-12-31 CN CN202011613870.8A patent/CN112792428A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489836A (en) * | 2011-12-07 | 2012-06-13 | 无锡汉神电气有限公司 | Device for automatically welding 90-degree large elbow |
| CN102699498A (en) * | 2012-06-01 | 2012-10-03 | 无锡市新峰管业股份有限公司 | Large submerged arc welding device for butt welding of bent pipes |
| CN202793096U (en) * | 2012-08-24 | 2013-03-13 | 风凯换热器制造(常州)有限公司 | Hairpin type heat exchanger |
| JP2014126311A (en) * | 2012-12-27 | 2014-07-07 | Orion Mach Co Ltd | Heat exchanger |
| CN103406644A (en) * | 2013-08-20 | 2013-11-27 | 中国海洋石油总公司 | Submerged-arc welding process for longitudinal seam and circular seam welding of pipe sections |
| CN106825875A (en) * | 2017-03-10 | 2017-06-13 | 广州增立钢管结构股份有限公司 | A kind of steel pipe vertical seam double-submerged arc technique |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210514 |
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| RJ01 | Rejection of invention patent application after publication |