CN111872519B - Control device and method for weld seam surplus height in straight welded pipe - Google Patents
Control device and method for weld seam surplus height in straight welded pipe Download PDFInfo
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- CN111872519B CN111872519B CN202010877333.8A CN202010877333A CN111872519B CN 111872519 B CN111872519 B CN 111872519B CN 202010877333 A CN202010877333 A CN 202010877333A CN 111872519 B CN111872519 B CN 111872519B
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- welded pipe
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 52
- 230000001105 regulatory effect Effects 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 113
- 230000007246 mechanism Effects 0.000 claims description 23
- 238000003466 welding Methods 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000006748 scratching Methods 0.000 claims description 4
- 230000002393 scratching effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
Classifications
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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
- B23K9/325—Devices for supplying or evacuating shielding gas
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
- B23K9/0253—Seam welding; Backing means; Inserts for rectilinear seams for the longitudinal seam of tubes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a control device and a control method for the weld seam surplus height in a straight welded pipe, wherein the control device comprises a gas conveying pipe, a connecting rod and a protective gas rod, a through hole penetrating the connecting rod in the horizontal direction is formed in the connecting rod, a hole for conveying gas is formed in the protective gas rod in the horizontal direction, and the gas conveying pipe and the protective gas rod are respectively arranged at two ends of the connecting rod so as to be used for conveying gas into the connecting rod and the protective gas rod through the gas conveying pipe. According to the invention, the protective gas rod is connected with the protective gas supply system through the connecting rod and the gas hose, and the digital display pressure regulating valve is arranged between the gas hose and the protective gas supply system, so that the minimum regulating precision of the digital display pressure regulating valve can be controlled to be 0.001MPa, the accurate control of the back blowing gas pressure is effectively realized, the residual height of the inner weld seam is controlled, and the shape of the inner weld seam is effectively ensured.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a control device and a control method for the weld seam surplus height in a straight welded pipe.
Background
In the prior art, the straight welded pipe is produced in a mode of adopting argon tungsten-arc welding, and when the straight welded pipe is produced in a mode of adopting argon tungsten-arc welding, because of the input of welding heat and the action of gravity, molten metal can form an inner weld seam surplus height in the pipe, because metal is not filled, the inner weld seam surplus height mainly comes from the wall thickness reduction of other positions, the appearance of the inner weld seam surplus height can cause two main problems on the basis of original wall thickness, firstly, the wall thickness of the inner weld seam surplus height position is increased, the stress concentration easily occurs in the pipe expanding process to cause cracking, secondly, the wall thickness of the original material must be increased to compensate the wall thickness reduction so as to meet the minimum wall thickness requirement of the pipe, and the production cost is increased.
Disclosure of Invention
The invention aims to provide a control device and a control method for the internal weld seam excess height of a straight welded pipe, which are used for effectively controlling the internal weld seam excess height of the straight welded pipe in the welding process by blowing inert gas into the pressure of the straight welded pipe to offset the gravity when metal is melted.
In order to achieve the above-mentioned purpose, the invention provides a control device for the weld seam surplus height in a straight welded pipe, which comprises a gas conveying pipe, a connecting rod and a protective gas rod, wherein a through hole penetrating along the horizontal direction is arranged in the connecting rod, a hole for conveying gas is arranged in the protective gas rod along the horizontal direction, and the gas conveying pipe and the protective gas rod are respectively arranged at two ends of the connecting rod for conveying gas into the connecting rod and the protective gas rod through the gas conveying pipe;
preferably, for effective air pressure transmission, the inner diameter of the blind hole is set to 6mm.
As a further aspect of the invention: in order to ensure that the gas conveyed into the protective gas rod is conveyed into the straight welded pipe uniformly, the protective gas rod is also uniformly provided with a plurality of gas outlet hole groups;
Preferably, the air outlet hole group comprises a central hole, a first array hole group and a second array hole group, wherein the first array hole group is arranged in a circumferential array mode by using the center of the central hole, and the second array hole group is arranged in a circumferential array mode by using the center of the central hole and is arranged outside the first array hole group.
Preferably, the central line of the central hole is perpendicular to the horizontal plane of the protective gas rod; the central line of the first array hole group is perpendicular to the horizontal plane of the protection gas rod; the central line of the second array hole group and the horizontal surface of the protective gas rod form an included angle of 75 degrees, so that effective protective gas flows out of the protective gas rod in a conical shape.
Preferably, the aperture of each air outlet hole group is set to be 1.5mm.
As a further aspect of the invention: the protective gas rod is also provided with a first supporting mechanism and a second supporting mechanism, and the first supporting mechanism and the second supporting mechanism are respectively arranged at two sides of the gas outlet hole group and used for preventing the protective gas rod from scratching the inner wall of the straight welded pipe;
preferably, the first supporting mechanism comprises a first supporting sheet, a first clamping sheet and a second clamping sheet, wherein a plurality of first air passing holes are formed in the first supporting sheet, and the first air passing holes are respectively penetrated along the conveying direction of the straight welded pipe; the first clamping piece and the second clamping piece are respectively arranged on two sides of the first supporting piece, second air passing holes are respectively formed in the first clamping piece and the second clamping piece, and the second air passing holes are respectively arranged in a penetrating manner along the conveying direction of the straight welded pipe;
preferably, the number of the first air passing holes is set to be 4, the diameter of the first air passing holes is determined according to the inner diameter of the straight welded pipe, the position relation of the first air passing holes meets the condition that the sum of the diameters of the first clamping pieces and the diameters of the first air passing holes is added by 5mm and is equal to the inner diameter of the straight welded pipe, and meanwhile, the projection circles of the first clamping pieces and the second clamping pieces on the first supporting piece are tangential to the first air passing holes;
Preferably, the number of the second air passing holes is set to be 6, the diameters of the second air passing holes are determined according to the outer diameters of the first clamping pieces and the second clamping pieces, the position relation of the second air passing holes meets the condition that the sum of the outer diameters of the protective air rods and the diameters of the second air passing holes is added by 6mm to be equal to the outer diameters of the first clamping pieces and the second clamping pieces, and meanwhile, the center line of the second air passing holes is located at the midpoint of the shortest connecting line between the point of the outer diameter circumference of any protective air rod and the circumference of the clamping pieces.
Preferably, the second supporting mechanism comprises a second supporting piece, a third clamping piece and a fourth clamping piece, and the third clamping piece and the fourth clamping piece are respectively arranged on two sides of the second supporting piece.
As a further aspect of the invention: in order to effectively ensure the pressure of the gas output by the protection gas rod, the gas conveying pipe is fixedly provided with a pressure regulating valve.
As a further aspect of the invention: the invention also provides a control method for the weld seam surplus height in the straight welded pipe, which comprises the following specific steps:
step one: the first supporting mechanism and the second supporting mechanism are sequentially arranged at two ends of the protective gas rod, and then the protective gas rod is placed into the straight welded pipe from the movement direction of the straight welded pipe;
Step two: pushing the connecting rod back and forth to adjust the positions of the air outlet holes and the welding gun, and ensuring that the positions of the air outlet hole groups and the welding gun are in relative positions;
step three: connecting a gas hose to an inert gas source;
Step four: opening an air source switch, and starting a welding gun to perform welding production;
Step five: the pressure of the gas blowback to the weld is controlled by observing and measuring the shape and the size of the weld and adjusting the digital display pressure regulating valve so as to effectively ensure that the pressure of the blowback gas is close to the gravity of molten metal in a weld pool.
The technical scheme of the invention has the following beneficial effects:
(1) According to the invention, the protective gas rod is connected with the protective gas supply system through the connecting rod and the gas hose, and the digital display pressure regulating valve is arranged between the gas hose and the protective gas supply system, so that the minimum regulating precision can be controlled to be 0.001MPa, the accurate control of the back blowing gas pressure is effectively realized, the residual height of the inner weld seam is controlled, and the appearance of the inner weld seam of the straight welded pipe is effectively ensured.
(2) The gas outlets are arranged on the protective gas rod in a specific arrangement mode (three layers of holes are formed from the inside to the outside, the first layer consists of one gas outlet, the second layer consists of six gas outlets, the third layer consists of six gas outlets, and the gas outlets of the second layer and the third layer are arranged in the most closely arranged mode), so that the gas is effectively blown into the straight welded pipe uniformly.
(3) The normal line of the planes of the air outlets of the first two layers is perpendicular to the horizontal plane, and the normal line of the plane of the air outlet of the third layer forms an angle of 75 degrees with the horizontal plane, so that the protective air flows out of the protective air rod in a conical shape.
(4) The invention effectively controls the blowing-out area of the gas by setting the diameters of all the protection air holes to be 1.5 mm.
(5) The invention discloses a protective gas rod, which is characterized in that two ends of the protective gas rod are provided with a supporting sheet and a clamping sheet, wherein the supporting material is made of fireproof flame-retardant cloth, the clamping sheet is made of pvc material, the purpose of the supporting sheet is to prevent the protective gas rod from scratching the inner wall of a straight welded pipe, and the clamping sheet provides certain strength for the supporting sheet.
(6) The support piece and the clamping piece on the moving direction side of the straight welded pipe are provided with the air passing holes, so that the protective gas can be fully flowed to the subsequent process to protect the straight welded pipe from being oxidized; the supporting piece and the clamping piece at the opposite side of the tube motion are not provided with air holes, so that the protection gas is fully utilized, and the protection gas is not consumed and lost at one end which does not need protection.
(7) The size of the gas passing holes is set, so that the gas passing holes are as large as possible under the condition of ensuring that the gas passing holes are supported, and the inert protective gas can flow to the subsequent working procedures.
(8) The diameter of the protection gas rod can be selected according to the inner diameter of the straight welded pipe, and the influence of the distance between the gas outlet hole and the inner wall of the straight welded pipe on the back blowing force is avoided, wherein the selection principle is as follows: the diameter of the protective gas rod is 15-20 mm smaller than the inner diameter of the straight welded pipe.
(9) The invention realizes the control of the surplus height of the inner weld by adopting a mode of opening holes on the protective gas rod and introducing inert gas to blow back the molten metal, and realizes the control of the surplus height of the inner weld by adjusting the pressure of the back blowing gas to counteract the gravity of the molten metal.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic front view of the whole structure of a device for controlling the surplus height of an inner weld seam in the invention;
FIG. 2 is a schematic view of part of the invention from above A;
FIG. 3 is a schematic view in partial cross-section of A in the present invention;
fig. 4 is a schematic left view of the first supporting mechanism in the present invention.
Wherein-01: straight welded pipe, 02: welding gun, 1: gas delivery tube, 2: connecting rod, 3: protection gas pole, 4: air outlet hole group, 41: center hole, 42: first array of holes, 43: second array of wells, 5: first support mechanism, 51: first support sheet, 52: first clip, 53: second clip, 54: first air passing hole, 55: second air passing hole, 6: second support mechanism, 61: second support sheet, 62: third clip, 63: and a fourth clamping piece.
In the figure, this is denoted by →.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 1 to 4, the control device for the weld seam allowance in a straight welded pipe provided by the invention comprises a gas conveying pipe 1, a connecting rod 2 and a protective gas rod 3, wherein a through hole penetrating the connecting rod 2 along the horizontal direction is formed in the connecting rod 2, a hole (not labeled) for conveying gas is formed in the protective gas rod 3 along the horizontal direction, and the gas conveying pipe 1 and the protective gas rod 3 are respectively arranged at two ends of the connecting rod 2 for conveying gas into the connecting rod 2 and the protective gas rod 3 through the gas conveying pipe 1.
As a further aspect of the invention: in order to ensure that the gas conveyed into the protective gas rod 3 is uniformly conveyed into the straight welded pipe 01, a plurality of gas outlet hole groups 4 are uniformly arranged on the protective gas rod 3;
Preferably, the gas outlet hole group 4 includes a central hole 41, a first array hole 42 group and a second array hole 43 group, where the first array hole 42 group is disposed in a circumferential array with a center of the central hole 41, and the second array hole 43 group is disposed in a circumferential array with a center of the central hole 41 and outside the first array hole 42 group.
Preferably, the central line of the central hole 41 is perpendicular to the horizontal plane of the shielding gas rod 3; the central line of the first array hole 42 group is perpendicular to the horizontal plane of the protection gas rod 3; the center line of the second array holes 43 set is arranged at an included angle of 75 degrees with the horizontal surface of the protective gas rod 3, so that the air flow is effectively promoted to flow out of the protective gas rod 3 in an inverted cone shape.
Preferably, the aperture of each air outlet hole group 4 is set to be 1.5mm.
As a further aspect of the invention: the protection gas pole 3 is further provided with a first supporting mechanism 5 and a second supporting mechanism 6, and the first supporting mechanism 5 and the second supporting mechanism 6 are respectively arranged on two sides of the gas outlet hole group 4 and used for supporting the protection gas pole 03 so as to prevent the protection gas pole 03 from scratching the inner wall of the straight welded pipe 01.
Preferably, the first supporting mechanism 5 includes a first supporting plate 51, a first clamping plate 52 and a second clamping plate, the first supporting plate 51 is provided with a plurality of first air passing holes 54, and the first air passing holes 54 are respectively arranged in a penetrating manner along the conveying direction of the straight welded pipe 01; the first clamping piece 52 and the second clamping piece are respectively arranged at two sides of the first supporting piece 51, the first clamping piece 52 and the second clamping piece are respectively provided with a second air passing hole 55, and the second air passing holes 55 are respectively arranged in a penetrating manner along the conveying direction of the straight welded pipe 01;
Preferably, the second supporting mechanism 6 includes a second supporting piece 61, a third clamping piece 62 and a fourth clamping piece 63, and the third clamping piece 62 and the fourth clamping piece 63 are respectively disposed on two sides of the second supporting piece 61.
As a further aspect of the invention: in order to effectively ensure the pressure of the gas output by the protection gas rod 3, the gas conveying pipe 1 is also fixedly provided with a pressure regulating valve (not labeled).
As a further aspect of the invention: the invention also provides a control method for the weld surplus height in the straight welded pipe 01, which comprises the following specific steps:
step one: the supporting pieces and the clamping pieces are sequentially arranged at two ends of the protective gas rod 3, and then the protective gas rod 3 is placed into the straight welded pipe 01 from the movement direction of the straight welded pipe 01;
Step two: pushing the connecting rod 2 back and forth to adjust the positions of the vent hole and the welding gun 02, and ensuring that the positions of the vent hole and the welding gun 02 are in relative positions;
step three: connecting a gas hose to an inert gas source;
step four: opening an air source switch, and starting a welding gun 02 to perform welding production;
Step five: the pressure of the gas blowback to the weld is controlled by observing and measuring the shape and the size of the weld and adjusting the digital display pressure regulating valve so as to effectively ensure that the pressure of the blowback gas is close to the gravity of molten metal in a weld pool.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A controlling means for weld seam surplus height in straight welded pipe, its characterized in that: the gas-protection device comprises a gas conveying pipe, a connecting rod and a protection gas rod, wherein a through hole penetrating the connecting rod in the horizontal direction is formed in the connecting rod, a hole with the inner diameter of 6mm is formed in the protection gas rod in the horizontal direction, and the gas conveying pipe and the protection gas rod are respectively arranged at two ends of the connecting rod and used for conveying gas into the connecting rod and the protection gas rod through the gas conveying pipe;
the protective gas rod is arranged in the straight welded pipe in an extending way, and the protective gas rod is also uniformly provided with a gas outlet hole group consisting of one or more gas outlet holes with the diameter of 1.5mm, so that gas is blown into the straight welded pipe;
The air outlet hole group comprises a central hole, a first array hole group and a second array hole group, wherein the first array hole group is arranged in a circumferential array mode by using the center of the central hole, and the second array hole group is arranged in a circumferential array mode by using the center of the central hole and is arranged at the outer side of the first array hole group;
The central line of the central hole is perpendicular to the horizontal plane of the protective gas rod; the central line of the first array hole group is perpendicular to the horizontal plane of the protection gas rod; the central line of the second array hole group is arranged at an included angle of 75 degrees with the horizontal surface of the protection gas rod;
the first supporting mechanism and the second supporting mechanism are respectively arranged on two sides of the air outlet hole group and used for preventing the protective air rod from scratching the inner wall of the straight welded pipe;
The first supporting mechanism comprises a first supporting sheet, a first clamping sheet and a second clamping sheet, one or more first air passing holes are formed in the first supporting sheet, and the first air passing holes are respectively penetrated along the conveying direction of the straight welded pipe; the first clamping piece and the second clamping piece are respectively arranged on two sides of the first supporting piece, and the first clamping piece and the second clamping piece are respectively provided with a second air passing hole, and the second air passing holes are respectively arranged in a penetrating mode along the conveying direction of the straight welded pipe.
2. The control device according to claim 1, characterized in that: the position relation of the first air passing holes meets the condition that the sum of the diameter of the first clamping piece and the diameter of the first air passing holes is added by 5mm and is equal to the inner diameter of the straight welded pipe, and meanwhile, the first air passing holes are tangent to projection circles of the first clamping piece and the second clamping piece on the first supporting piece.
3. The control device according to claim 1, characterized in that: the position relation of the second air passing holes meets the condition that the sum of the outer diameter of the protective air rod and the diameter of the second air passing holes is added by 6mm and is equal to the outer diameters of the first clamping piece and the second clamping piece, and meanwhile, the center line of the second air passing holes is positioned at the midpoint of the shortest connecting line between the point of the outer diameter circumference of any protective air rod and the circumference of the clamping piece.
4. The control device according to claim 1, characterized in that: the second supporting mechanism comprises a second supporting piece, a third clamping piece and a fourth clamping piece, and the third clamping piece and the fourth clamping piece are respectively arranged on two sides of the second supporting piece.
5. The control device according to claim 1, characterized in that: and the gas conveying pipe is also fixedly provided with a pressure regulating valve.
6. A control method for the weld seam surplus height in a straight welded pipe is characterized by comprising the following steps: the control device according to any one of claims 1 to 5 is adopted, comprising the following specific steps:
step one: the first supporting mechanism and the second supporting mechanism are sequentially arranged at one end, away from the connecting rod, of the protection gas rod, wherein the two ends of the protection gas rod are provided with holes, and then the protection gas rod is placed into the straight welded pipe from the movement direction of the straight welded pipe;
Step two: pushing the connecting rod back and forth to adjust the positions of the air outlet holes and the welding gun, and ensuring that the positions of the air outlet hole groups and the welding gun are in relative positions;
step three: connecting a gas hose to an inert gas source;
Step four: opening an air source switch, and starting a welding gun to perform welding production;
Step five: the pressure of the gas blowback to the weld is controlled by observing and measuring the shape and the size of the weld and adjusting the digital display pressure regulating valve so as to effectively ensure that the pressure of the blowback gas is close to the gravity of molten metal in a weld pool.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877333.8A CN111872519B (en) | 2020-08-27 | 2020-08-27 | Control device and method for weld seam surplus height in straight welded pipe |
| DE212020000716.0U DE212020000716U1 (en) | 2020-08-27 | 2020-11-17 | Shielding gas device for welding a longitudinally welded pipe and welding device |
| PCT/CN2020/129330 WO2022041505A1 (en) | 2020-08-27 | 2020-11-17 | Protective gas device for welding longitudinally welded pipe, welding device and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010877333.8A CN111872519B (en) | 2020-08-27 | 2020-08-27 | Control device and method for weld seam surplus height in straight welded pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111872519A CN111872519A (en) | 2020-11-03 |
| CN111872519B true CN111872519B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010877333.8A Active CN111872519B (en) | 2020-08-27 | 2020-08-27 | Control device and method for weld seam surplus height in straight welded pipe |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN111872519B (en) |
| DE (1) | DE212020000716U1 (en) |
| WO (1) | WO2022041505A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111872519B (en) * | 2020-08-27 | 2024-05-14 | 湖南湘投金天新材料有限公司 | Control device and method for weld seam surplus height in straight welded pipe |
| CN114713949B (en) * | 2022-03-23 | 2024-05-28 | 西安菲尔特金属过滤材料股份有限公司 | Automatic welding back gas protection device for metal mesh belt |
| CN114535758A (en) * | 2022-03-29 | 2022-05-27 | 广州文冲船舶修造有限公司 | Gas protection method for digging, replacing and welding deformed part of desulfurizing tower |
| CN115488473B (en) * | 2022-09-29 | 2024-04-19 | 哈电集团（秦皇岛）重型装备有限公司 | Auxiliary system for TIG welding of inner groove of small-caliber pipe and welding method using auxiliary system |
| CN117506256A (en) * | 2023-12-22 | 2024-02-06 | 山东恒辉节能技术集团有限公司 | welding device |
| CN117464262B (en) * | 2023-12-26 | 2024-03-12 | 河南省超滤净化设备有限公司 | Filtering screen welding equipment |
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| CN111872519B (en) * | 2020-08-27 | 2024-05-14 | 湖南湘投金天新材料有限公司 | Control device and method for weld seam surplus height in straight welded pipe |
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2020
- 2020-08-27 CN CN202010877333.8A patent/CN111872519B/en active Active
- 2020-11-17 WO PCT/CN2020/129330 patent/WO2022041505A1/en active Application Filing
- 2020-11-17 DE DE212020000716.0U patent/DE212020000716U1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2022041505A1 (en) | 2022-03-03 |
| DE212020000716U1 (en) | 2022-04-26 |
| CN111872519A (en) | 2020-11-03 |
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