CN110052690B - Submerged-arc welding device and welding method - Google Patents
Submerged-arc welding device and welding method Download PDFInfo
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- CN110052690B CN110052690B CN201910461590.0A CN201910461590A CN110052690B CN 110052690 B CN110052690 B CN 110052690B CN 201910461590 A CN201910461590 A CN 201910461590A CN 110052690 B CN110052690 B CN 110052690B
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- solder
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- submerged arc
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- 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
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- 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
- B23K9/32—Accessories
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- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to an underwater submerged arc welding device and a welding method, belonging to the technical field of underwater submerged arc welding, wherein the device comprises a solder box and a sleeve, wherein solder is arranged in the solder box, the solder is sticky liquid waterproof solder, the bottom of the solder box is provided with a solder conveying pipe, one end of the solder conveying pipe is connected with the sleeve, the other end of the solder conveying pipe is provided with a stepping motor, and an auger is arranged in the solder conveying pipe and connected with the stepping motor; the top end of the sleeve is connected with a gun barrel of the welding gun, and the lower part of the welding gun is annularly nested inside the sleeve. The control of the solder conveying speed can be realized by adjusting the rotating speed of the stepping motor, the purpose of controlling the solder covering thickness of a welding area is further achieved, the formation of a welding seam is effectively improved, the cooling speed of the welding seam is reduced, the structure of a welding joint is improved, and the mechanical property of the welding joint is effectively improved.
Description
Technical Field
The invention relates to an underwater submerged arc welding device and a welding method, and belongs to the technical field of underwater welding.
Background
With the continuous development of ocean engineering and the increasing demand of ocean resource exploitation, the underwater wet welding technology has been widely applied to the construction of offshore oil and gas platforms and the laying and maintenance of submarine oil pipelines due to the advantages of flexible operation and low cost. However, since the area surrounding the underwater wet welding is not air but water, the two media have different physicochemical properties, which has a series of adverse effects on the underwater welding. The main expression is as follows: (1) the hydrogen content of the welding seam is high. In the process of underwater wet welding, the underwater electric arc can cause the water around the electric arc to generate heat and decompose, so that the hydrogen dissolved in a welding seam is increased, the cold cracking tendency of the welding seam is increased, and the quality of the welding joint is easily deteriorated. (2) The cooling speed is high. When the underwater wet welding is carried out, the welded workpiece is directly positioned in water, the quenching effect of water on a welding seam is obvious, a high-hardness hardening structure is easily generated, and the mechanical property of a welding joint is greatly reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an underwater submerged arc welding device for solving the problems, particularly reducing the influence of the water environment on the welding process, wherein a viscous liquid waterproof welding flux obtained by uniformly mixing a commercial HJ350 submerged arc welding flux and epoxy resin is used for protecting a welding area, and the influence of the water environment on the welding is reduced.
The invention also provides a welding method of the device.
The technical scheme of the invention is as follows:
an underwater submerged arc welding device comprises a solder box and a sleeve, wherein solder is arranged in the solder box, a solder conveying pipe is arranged at the bottom of the solder box, one end of the solder conveying pipe is connected with the sleeve, a stepping motor is arranged at the other end of the solder conveying pipe, an auger is arranged in the solder conveying pipe, and the auger is connected with the stepping motor; the top end of the sleeve is connected with a gun barrel of the welding gun, and the lower part of the welding gun is annularly nested inside the sleeve. The control of the solder conveying speed can be realized by adjusting the rotating speed of the stepping motor, and the purpose of controlling the solder covering thickness of a welding area is further achieved.
Preferably, in order to prevent the solder box from water inflow, a box cover is arranged at the top of the solder box, and a rubber ring is arranged between the box cover and the solder box. The stepping motor is also subjected to waterproof sealing treatment.
Preferably, the gun barrel of the welding gun is fixedly connected with the welding flux box through the connecting plate.
Further preferably, an annular fixing clamp is arranged between the connecting plate and the gun barrel of the welding gun.
Preferably, the solder box is a rectangular box body, a trapezoidal funnel is arranged at the bottom of the solder box, and the trapezoidal funnel is connected with the pipe wall of the solder conveying pipe.
Preferably, the solder is a viscous liquid water-resistant solder, and the solder composition comprises HJ350 submerged arc flux and epoxy resin. The submerged arc welding flux is subjected to waterproof mixing by using epoxy resin, and when the mixed welding flux is filled in a welding area, water and air can be effectively isolated.
Further preferably, the weight ratio of the HJ350 submerged arc flux to the epoxy resin is 3: 2. The welding effect of the solder in the proportion is the best in the welding process, and the welding seam is formed well.
Preferably, in order to prolong the service life of the device, the solder box, the solder conveying pipe and the sleeve are made of stainless steel materials, so that corrosion in long-term underwater work is prevented, and the inner surface of the device is coated with Teflon coating by a spraying technology to prevent the solder from adhering.
A welding method using the submerged arc welding apparatus can improve the submerged arc welding of the underwater welding environment, and the method is realized in the apparatus, and comprises the following steps:
when carrying out submerged plate surfacing or butt welding, place the viscidity liquid water-fast solder in the solder case, open step motor and set up conveying speed, the solder gets into in the solder conveying pipe from the solder case, utilizes the solder conveying pipe to carry the solder to the sleeve in to fill in waiting to weld the district afterwards, the welding wire welds under the protection of liquid solder.
Preferably, the solder conveying device is started preferentially, the solder is conveyed to a region to be welded, wire feeding is started after the required solder coverage thickness is achieved, and the welding gun performs welding.
The invention has the beneficial effects that:
compared with the traditional underwater wet welding, the underwater submerged arc welding under the protection of the liquid solder effectively improves the formation of a welding line, reduces the cooling speed of the welding line, improves the structure of a welding joint and effectively improves the mechanical property of the welding joint. In addition, compared with high-pressure dry underwater welding and local dry underwater welding which are high in manufacturing cost, the method is low in cost and more suitable for large-scale popularization and application.
Drawings
FIG. 1 is a schematic perspective view of the apparatus of the present invention;
FIG. 2 is a schematic cross-sectional view of the device of the present invention in a three-dimensional configuration;
FIG. 3 is a cross-sectional view of the structure A-A of FIG. 2;
FIG. 4 is a structural cross-sectional view of B-B in FIG. 2;
FIG. 5a is a weld map obtained by conventional underwater wet welding;
FIG. 5b is a diagram of a weld obtained using the method of the present invention.
In the figure: 1. the welding flux box comprises a welding flux box cover, 2, a welding flux box, 3, a stepping motor, 4, a welding flux conveying pipe, 5, a sleeve, 6, a connecting plate, 7, an annular fixing clamp, 8, a welding gun, 9 and a packing auger.
Detailed Description
The present invention will be further described by way of examples, but not limited thereto, with reference to the accompanying drawings.
As shown in fig. 1-4.
Example 1:
an underwater submerged arc welding device comprises a solder box and a sleeve, wherein solder is arranged in the solder box, a solder conveying pipe is arranged at the bottom of the solder box, one end of the solder conveying pipe is connected with the sleeve, a stepping motor is arranged at the other end of the solder conveying pipe, an auger is arranged in the solder conveying pipe, and the auger is connected with the stepping motor; the top end of the sleeve is connected with a gun barrel of the welding gun, and the lower part of the welding gun is annularly nested inside the sleeve. The control of the solder conveying speed can be realized by adjusting the rotating speed of the stepping motor, and the purpose of controlling the solder covering thickness of a welding area is further achieved.
The solder is viscous liquid waterproof solder, and comprises HJ350 submerged arc welding flux and epoxy resin in a weight ratio of 3: 2. The conventional submerged arc welding flux is dry solid particles when used in air, cannot be directly used in the working environment of underwater wet welding, can effectively improve the waterproof performance of the submerged arc welding flux after being mixed with epoxy resin, isolates water and air, and has excellent welding effect and good weld formation.
In order to prolong the service life of the device, the solder box, the solder conveying pipe and the sleeve are made of stainless steel materials, so that corrosion in long-term underwater work is prevented, and the inner surface of the solder box is coated with Teflon coating by a spraying technology to prevent the solder from adhering.
Example 2:
an underwater submerged arc welding apparatus constructed as described in embodiment 1, except that a tank cover is provided on the top of the solder tank and a rubber ring is provided between the tank cover and the solder tank in order to prevent the solder tank from being flooded. The stepping motor is also subjected to waterproof sealing treatment.
Example 3:
an underwater submerged arc welding apparatus is constructed as described in embodiment 1, except that a gun barrel of a welding torch is fixedly connected to a solder tank through a connecting plate.
Example 4:
an underwater submerged arc welding apparatus of the construction as set forth in embodiment 3, except that an annular fixing catch is provided between the connecting plate and the gun barrel of the welding gun.
Example 5:
an underwater submerged arc welding apparatus is constructed as described in embodiment 1, except that a solder tank is a rectangular tank body, and a trapezoidal funnel is provided at the bottom of the solder tank and connected to the wall of a solder feed pipe.
Example 6:
a welding method using the submerged arc welding apparatus of example 1, which can improve submerged arc welding in an underwater welding environment, the method being implemented in the apparatus, comprising the steps of:
when carrying out underwater flat surfacing or butt welding, the sticky liquid water-resistant solder is placed in a solder box, a solder conveying device is started preferentially, a stepping motor is started and the conveying speed of 150ml/min is set, the solder enters the solder conveying pipe from the solder box, the solder is conveyed into a sleeve by the solder conveying pipe and then filled in a region to be welded, the wire feeding is started after the required solder covering thickness is reached, the covering thickness is 18mm, and the welding wire is welded under the protection of the liquid solder.
The solder used in the embodiment is formed by mixing HJ350 submerged arc welding flux and epoxy resin in a weight ratio of 3: 2.
The obtained welding seam comparison pictures are shown in fig. 5a and 5b, and the comparison of fig. 5a and 5b can find that the welding seam obtained by adopting the process provided by the invention is uniform in forming, compared with the common underwater wet process, the welding bead of the process cannot be obviously deviated, and the symmetry and uniformity of the welding seam are better improved.
Besides the technical solutions described in the above embodiments of the present invention, the present invention should be modified without changing the main inventive concept.
Claims (8)
1. An underwater submerged arc welding device is characterized by comprising a solder box and a sleeve, wherein solder is arranged in the solder box, a solder conveying pipe is arranged at the bottom of the solder box, one end of the solder conveying pipe is connected with the sleeve, a stepping motor is arranged at the other end of the solder conveying pipe, and an auger is arranged in the solder conveying pipe and connected with the stepping motor; the top end of the sleeve is connected with a gun barrel of the welding gun, and the lower part of the welding gun is annularly nested in the sleeve;
the solder is viscous liquid waterproof solder, the solder components comprise submerged arc welding flux and epoxy resin, and the weight ratio of the submerged arc welding flux to the epoxy resin is 3: 2.
2. An underwater submerged arc welding apparatus as claimed in claim 1, wherein a tank cover is provided on the top of the solder tank, and a rubber ring is provided between the tank cover and the solder tank.
3. The submerged arc welding apparatus of claim 1, wherein the gun barrel of the welding gun is fixedly connected to the solder pot by a web.
4. An underwater submerged arc welding apparatus as claimed in claim 3, wherein an annular retaining catch is provided between the connection plate and the gun barrel of the welding gun.
5. The submerged arc welding apparatus of claim 1, wherein the solder tank is a rectangular tank body, and a trapezoidal funnel is arranged at the bottom of the solder tank and is connected with the pipe wall of the solder delivery pipe.
6. The submerged arc welding apparatus of claim 1, wherein the solder tank, the solder delivery pipe, and the sleeve are made of stainless steel, and the inner surfaces of the solder tank, the solder delivery pipe, and the sleeve are coated with teflon paint.
7. A welding method using the submerged arc welding apparatus as claimed in any one of claims 1 to 6, the steps comprising:
when carrying out underwater flat surfacing or butt welding, placing the solder in a solder box, starting a stepping motor and setting the conveying speed, enabling the solder to enter a solder conveying pipe from the solder box, conveying the solder into a sleeve by using the solder conveying pipe, filling the sleeve into a region to be welded, and welding the welding wire under the protection of liquid solder.
8. The welding method of claim 7, wherein the solder delivery device is activated preferentially to deliver solder to the area to be welded, and after the desired solder coverage thickness is achieved, wire feeding is started and the welding gun proceeds to weld.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910461590.0A CN110052690B (en) | 2019-05-30 | 2019-05-30 | Submerged-arc welding device and welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910461590.0A CN110052690B (en) | 2019-05-30 | 2019-05-30 | Submerged-arc welding device and welding method |
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| CN110052690A CN110052690A (en) | 2019-07-26 |
| CN110052690B true CN110052690B (en) | 2020-12-04 |
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| CN201910461590.0A Active CN110052690B (en) | 2019-05-30 | 2019-05-30 | Submerged-arc welding device and welding method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6399912B1 (en) * | 2000-04-25 | 2002-06-04 | Illinois Tool Works Inc. | Method and apparatus for submerged arc welding |
| CN202861601U (en) * | 2012-09-18 | 2013-04-10 | 天津市津莆钢结构有限公司 | Wire-feeding steering structure of submerged arc gantry welding |
| CN105499767A (en) * | 2015-12-28 | 2016-04-20 | 天津市海丰源科技有限公司 | Novel submerged arc welding device |
| DE102017006075A1 (en) * | 2016-06-28 | 2017-12-28 | Lincoln Global, Inc. | WELDING SHAFT FOR STAINLESS STEEL APPLICATIONS |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB394773A (en) * | 1932-03-21 | 1933-07-06 | Leonard Miller | Improvements in or relating to electric arc welding machines |
| US4069408A (en) * | 1976-06-07 | 1978-01-17 | Massachusetts Institute Of Technology | Method and apparatus for underwater submerged arc welding |
| JP3888573B2 (en) * | 2001-06-29 | 2007-03-07 | 富士電機ホールディングス株式会社 | Solder composition |
| CN201913368U (en) * | 2010-12-24 | 2011-08-03 | 中国二十二冶集团有限公司 | Automatic submerged arc welding flux conveyor |
| CN202377655U (en) * | 2011-12-27 | 2012-08-15 | 成都熊谷加世电器有限公司 | Automatic submerged arc welding flux discharging adjusting device |
| CN207154963U (en) * | 2017-09-05 | 2018-03-30 | 中核华泰建设有限公司 | Submerged arc electric welding machine |
| CN109285411A (en) * | 2018-11-21 | 2019-01-29 | 南通理工学院 | Plate submerged arc welding simulation and evaluation device based on increases material manufacturing technology |
-
2019
- 2019-05-30 CN CN201910461590.0A patent/CN110052690B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6399912B1 (en) * | 2000-04-25 | 2002-06-04 | Illinois Tool Works Inc. | Method and apparatus for submerged arc welding |
| CN202861601U (en) * | 2012-09-18 | 2013-04-10 | 天津市津莆钢结构有限公司 | Wire-feeding steering structure of submerged arc gantry welding |
| CN105499767A (en) * | 2015-12-28 | 2016-04-20 | 天津市海丰源科技有限公司 | Novel submerged arc welding device |
| DE102017006075A1 (en) * | 2016-06-28 | 2017-12-28 | Lincoln Global, Inc. | WELDING SHAFT FOR STAINLESS STEEL APPLICATIONS |
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| CN110052690A (en) | 2019-07-26 |
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