CN112589235A - U-rib bilateral double-arc synchronous asymmetric penetration welding process - Google Patents
U-rib bilateral double-arc synchronous asymmetric penetration welding process Download PDFInfo
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- 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
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- B23K9/16—Arc welding or cutting making use of shielding gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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Abstract
The invention relates to a U-rib double-side double-arc synchronous asymmetric penetration welding process which can reduce welding cost, shorten manufacturing period and ensure excellent internal quality and attractive appearance of a welding seam, (1) pre-welding treatment: the U-rib single plate is not required to be provided with a groove, and the welding area of the single plate and the panel unit is polished for derusting; (2) unit assembling: assembling the single plate and the panel according to the actual U-rib assembly angle by using common CO2Gas shielded welding positioning welding, after the assembly is finished, the plate unit is placed and fixed on the welding platform; (3) welding: the inner side welding gun and the outer side welding gun are arranged at two sides of the longitudinal welding seam in the front-back direction according to the direction of the figure 1; and carrying out synchronous welding. The advantages are that: the edge of the U rib does not need to be provided with a groove, the inner side and the outer side are welded in a synchronous and asymmetric mode by adopting submerged arc welding, the inner welding gun and the outer welding gun keep the following distance of the length of a molten pool, and the U rib is realizedThe welding seam is fully melted through, and has the advantages of high efficiency, short period, small deformation, low cost and the like.
Description
Technical Field
The invention relates to a U-rib double-side double-arc synchronous asymmetric penetration welding process which can reduce welding cost, shorten manufacturing period and ensure excellent internal quality and attractive appearance of a welding seam.
Background
CN 107598330A, name "U Rib full penetration welding method", has disclosed U Rib full penetration welding technique, and the angle of adjustment welding plate and horizontal plane is 8 °, and the contained angle of welder and horizontal plane is 32 °, and the backing weld material is solid wire, and welding equipment is the concentrated pulse deep penetration welder, and the capping is ordinary flux cored wire gas shielded welding, realizes U Rib full penetration welding. The method for welding the penetration weld of the U-shaped rib needs to process a welding edge groove, and the filling amount of welding materials is large, so that the manufacturing cost is invisibly increased, and the production period is prolonged.
The single-side welding and double-side forming welding process is not mature at present, and the weld penetration rate needs to be verified in the subsequent project manufacturing process.
The double-sided welding, namely the edge of the U rib is processed or the groove is not processed, a special rigid tie rod enables a welding gun to penetrate into the inner side flat corner position to be welded with a bottom sealing welding seam, the outer side is welded by adopting ship position submerged arc welding, the surface forming is good, the internal defects in welding are few, the one-time flaw detection qualification rate is high, and the fatigue resistance of the welding seam in the alternating load process can be effectively improved. At present, the U-rib double-sided full-penetration welding technology is applied to partial major bridge engineering projects, and the one-time flaw detection qualification rate is as high as about 96%. However, in the method, the plate units need to be transferred from the flat bed jig to the ship bed jig in the manufacturing process of the plate units, so that the method occupies field resources and prolongs the production period.
In conclusion, the existing fusion penetration welding process for the U ribs of the bridge deck slab can basically meet the design requirements of the steel bridge girder, but cannot meet the requirements of most manufacturing units in China on improving the welding production efficiency and maintaining the lower production period and the lower cost.
Disclosure of Invention
The design purpose is as follows: aiming at the key technology in the background technology, the U-rib double-side double-arc synchronous asymmetric penetration welding process is designed, which can reduce the welding cost, shorten the manufacturing period and ensure the excellent internal quality and attractive appearance of a welding seam.
The design scheme is as follows: in order to achieve the above design objectives. The invention provides a bilateral double-arc synchronous asymmetric welding technology, which enables a welding seam to meet the requirement of full penetration. The edge of the U rib does not need to be provided with a groove, the inner side and the outer side of the U rib are welded in a synchronous and asymmetrical mode by adopting submerged arc welding, the inner welding gun and the outer welding gun keep a follow-up distance of the length of a molten pool, the full penetration of the welding line of the U rib is realized, and the U rib welding line welding device has the advantages of high efficiency, short period, small deformation, low cost and the like. The invention aims to provide a bilateral double-arc same-part asymmetric full penetration welding process for a U rib, which adopts a single plate to simulate the assembly angle of the solid bridge U rib.
(1) Pretreatment in welding: the U-rib single plate is not required to be provided with a groove, and the welding area of the single plate and the panel unit is polished for derusting; in the step (1), the thickness of the U-rib single plate is 6-10 mm, and the thickness of the panel is 12-16 mm; polishing the welding seam area in the step (1) to be 30-50 mm;
(2) unit assembling: assembling the single plate and the panel according to the actual U-rib assembly angle by using common CO2Gas shielded welding positioning welding, after the assembly is finished, the plate unit is placed and fixed on the welding platform; in the step (2), the assembly gap between the U-rib single plate and the panel is 0-0.5 mm;
(3) welding: the inner welding gun and the outer welding gun are arranged in the front and back direction according to the direction of figure 1, as shown in figure 2, the inner welding gun is in the front, the outer welding gun is in the back, the distance between the inner welding gun and the outer welding gun is 80-120mm, the inner welding gun and the outer welding gun arc simultaneously, the U-shaped rib penetration welding seam is formed by one-time welding, and the U-shaped rib penetration welding seam is arranged on two sides of the longitudinal welding seam; carrying out synchronous welding; the welding speed in the step (3) is 350-450 mm/min; in the step (3), the inner welding adopts a H08Mn2E coiled submerged arc welding wire with the diameter of 1.6 mm; the outer welding adopts a submerged arc welding wire which is coiled and has the diameter of 3.2mm and H08Mn 2E; the flux used for internal and external welding is SJ101 q;
preferably, the distance between the inner welding gun and the outer welding gun in the step (3) is 80-120 mm;
preferably, the angle alpha between the inner side welding gun and the panel in the step (3) is 32-42 degrees, and the welding wire points to the root of the welding seam and slightly deviates 1-2 mm, so that welding penetration is prevented; the angle beta between the outer welding gun and the panel is 48-58 degrees, and the welding wire points to the root of the welding seam to ensure full penetration of the welding seam;
preferably, the forward inclination angle gamma of the inner side welding gun in the step (3) is 3-6 degrees, which is beneficial to improving the weld penetration; the back-tilting angle beta of the outer welding gun is 7-10 degrees, the welding parameters of the rear wire are larger, the welding seam is prevented from being burnt through and protruding, the width of the welding seam is increased, and the appearance forming quality of the welding seam is improved;
preferably, the internal welding machine in the step (3) is a direct current power supply, the polarity is direct current reverse connection, the welding current is 350-420A, and the voltage is 32-36V;
preferably, the external welding machine in the step (3) is a direct current power supply, the polarity is direct current reverse connection, the welding current is 500-580A, and the voltage is 32-36V;
compared with the prior art, the invention has the advantages that firstly, the inner side and the outer side of the U-rib single plate are synchronously welded and formed by one-step welding, so that the transfer process is saved, the manufacturing period is shortened, and the production efficiency is improved; the U rib plate unit does not need to be provided with a groove, so that the groove processing cost is saved, meanwhile, the edges of the steel plates are remelted under the action of inner and outer arcs in the welding process to form an intersection welding bead, the requirement of weld penetration is met, the filling amount of welding deposited metal is greatly reduced, and welding materials are saved; thirdly, double-side double-arc synchronous asymmetric welding is carried out, the rear wire can repeatedly utilize a welding heat source of the front wire to melt steel plate metal, the welding heat input of the rear wire is reduced, and the welding deformation is small; and fourthly, the inner side and the outer side are welded by adopting submerged arc welding, the appearance of the welded seam is formed well after welding, and the internal quality of the welded seam is excellent. The double-side double-arc asymmetric welding has the advantages that the first welding bead has a preheating effect on the second welding bead, the follow-up electric arc has a secondary heat treatment effect on the first welding bead, the welding seam structure is improved to a certain extent, the mechanical property of the welding seam is improved, and the anti-fatigue capability of the welding seam of the U rib is improved.
Drawings
Fig. 1 is an assembly schematic view of a U-rib veneer.
FIG. 2 is a schematic diagram of the spacing and the front-back inclination angle of the welding guns on the two sides of the U-rib single plate.
FIG. 3 is a schematic view of the angle arrangement of welding guns on two sides of a U-rib single plate.
Detailed Description
Example 1: a U-rib bilateral double-arc synchronous asymmetric penetration welding process comprises the following steps:
(1) pretreatment in welding: the U-rib veneer is made of Q345qD, the plate thickness is 6mm, the length is 3000mm, the panel is made of Q345qD, the plate thickness is 12mm, and the length is 3000 mm. The workpiece does not need to be processed with a groove, and the single plate and the panel unit are welded in the range of 30mm for polishing and derusting;
(2) unit assembling: the assembly angle of the single board and the panel is 78 degrees, the assembly gap is 0.3mm, and common CO is used2Gas shielded welding positioning welding, after the assembly is finished, the plate unit is placed and fixed on the welding platform;
(3) welding: the inner welding adopts a submerged arc welding wire which is 1.6mm in diameter and coiled by H08Mn 2E; the outer welding adopts a submerged arc welding wire which is coiled and has the diameter of 3.2mm and H08Mn 2E; the flux used for internal and external welding is SJ101 q; the distance between the inner welding gun and the outer welding gun is 120mm, and the power supplies of the inner welding gun and the outer welding gun are in direct current reverse connection. The internal welding current is 350A, and the voltage is 34V; the external welding current is 500A, and the voltage is 34V; the welding speed is 450 mm/min; the angle alpha between the inner welding gun and the panel is 32 degrees, the forward inclination angle gamma is 4 degrees, and the welding wire points to the root of the welding seam and slightly deviates 1-2 mm; the outside torch to panel angle β is 48 °, and the back rake angle β is 7 °.
The welding seams on the inner side and the outer side of the workpiece welded by the process of the embodiment have no humps and undercuts, and the appearance is uniform and smooth. Ultrasonic flaw detection is adopted, and the penetration rate of a welding seam is up to 99.5%.
Example 2: a U-rib bilateral double-arc synchronous asymmetric penetration welding process comprises the following steps:
(1) pretreatment in welding: the U-rib single plate is made of Q345qD, the plate thickness is 8mm, the panel with the length of 3000mm is made of Q345qD, the plate thickness is 14mm, and the length is 3000 mm. The workpiece does not need to be processed with a groove, and the single plate and the panel unit are welded in the area of 40mm in range and are polished for derusting;
(2) unit assembling: the assembly angle of the single board and the panel is 78 degrees, the assembly gap is 0.5mm, and common CO is used2Gas shielded welding tack weldAfter the assembly is finished, the plate unit is placed and fixed on the welding platform;
(3) welding: the inner welding adopts a submerged arc welding wire which is 1.6mm in diameter and coiled by H08Mn 2E; the outer welding adopts a submerged arc welding wire which is coiled and has the diameter of 3.2mm and H08Mn 2E; the flux used for internal and external welding is SJ101 q; the distance between the inner welding gun and the outer welding gun is 100mm, and the power supplies of the inner welding gun and the outer welding gun are in direct current reverse connection. The welding current of the inner side welding is 380A, and the voltage is 34V; the outside welding current is 530A, and the voltage is 35V; the welding speed is 420 mm/min; the angle alpha between the inner welding gun and the panel is 36 degrees, the forward inclination angle gamma is 4 degrees, the root of the welding wire pointed to the welding seam is slightly deviated from 1-2 mm, the angle beta between the outer welding gun and the panel is 52 degrees, and the backward inclination angle beta is 8 degrees.
The welding seams on the inner side and the outer side of the workpiece welded by the process of the embodiment have no humps and undercuts, and the appearance is uniform and smooth. Ultrasonic flaw detection is adopted, and the penetration rate of a welding seam is as high as 99.1%.
Example 3: a U-rib bilateral double-arc synchronous asymmetric penetration welding process comprises the following steps:
(1) pretreatment in welding: the U-rib veneer is made of Q345qD, the plate thickness is 10mm, the panel with the length of 3000mm is made of Q345qD, the plate thickness is 16mm, and the length is 3000 mm. The workpiece does not need to be processed with a groove, and the single plate and the panel unit are welded in the area of 40mm in range and are polished for derusting;
(2) unit assembling: the assembly angle of the single board and the panel is 78 degrees, the assembly gap is 0.2mm, and common CO is used2Gas shielded welding positioning welding, after the assembly is finished, the plate unit is placed and fixed on the welding platform;
(3) welding: the inner welding adopts a submerged arc welding wire which is 1.6mm in diameter and coiled by H08Mn 2E; the outer welding adopts a submerged arc welding wire which is coiled and has the diameter of 3.2mm and H08Mn 2E; the flux used for internal and external welding is SJ101 q; the distance between the inner welding gun and the outer welding gun is 80mm, and the power supplies of the inner welding gun and the outer welding gun are in direct current reverse connection. The welding current of the inner side welding is 420A, and the voltage is 35V; the welding current of the outer side welding is 580A, and the voltage is 36V; the welding speed is 350 mm/min; the angle alpha between the inner side welding gun and the panel is 42 degrees, the forward inclination angle gamma is 6 degrees, the root of the welding wire pointed to the welding seam is slightly deviated from 1-2 mm, the angle beta between the outer side welding gun and the panel is 58 degrees, and the backward inclination angle beta is 10 degrees.
The welding seams on the inner side and the outer side of the workpiece welded by the process of the embodiment have no humps and undercuts, and the appearance is uniform and smooth. Ultrasonic flaw detection is adopted, and the penetration rate of a welding seam is as high as 99.2%.
It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.
Claims (5)
1. A U-rib bilateral double-arc synchronous asymmetric fusion penetration welding process is characterized in that:
(1) pretreatment in welding: the U-rib single plate is not required to be provided with a groove, and the welding area of the single plate and the panel unit is polished for derusting;
(2) unit assembling: assembling the single plate and the panel according to the actual U-rib assembly angle by using common CO2Gas shielded welding positioning welding, after the assembly is finished, the plate unit is placed and fixed on the welding platform;
(3) welding: the inner side welding gun and the outer side welding gun are arranged at two sides of the longitudinal welding seam in the front-back direction according to the direction of the figure 1; and carrying out synchronous welding.
2. The U-rib double-side double-arc synchronous asymmetric penetration welding process according to claim 1, which is characterized in that:
in the step (1), the thickness of the U-rib single plate is 6-10 mm, and the thickness of the panel is 12-16 mm;
polishing the welding seam area in the step (1) to be 30-50 mm;
in the step (2), the assembly gap between the U-rib single plate and the panel is 0-0.5 mm;
the welding speed in the step (3) is 350-450 mm/min;
in the step (3), the inner welding adopts a H08Mn2E coiled submerged arc welding wire with the diameter of 1.6 mm; the outer welding adopts a submerged arc welding wire which is coiled and has the diameter of 3.2mm and H08Mn 2E; the flux for inside and outside welding is SJ101 q.
3. The U-rib double-side double-arc synchronous asymmetric penetration welding process according to claim 2, which is characterized in that: in the step (3), the distance between the inner side welding gun and the outer side welding gun is 80-120 mm; in the step (3), the angle alpha between the inner side welding gun and the panel is 32-42 degrees, the welding wire points to the root of the welding seam and slightly deviates 1-2 mm, and welding penetration is prevented; the angle beta between the outer welding gun and the panel is 48-58 degrees, and the welding wire points to the root of the welding seam to ensure full penetration of the welding seam.
4. The U-rib double-side double-arc synchronous asymmetric penetration welding process according to claim 2, which is characterized in that: in the step (3), the forward inclination angle gamma of the inner side welding gun is 3-6 degrees, which is beneficial to improving the weld penetration; the back-tilting angle beta of the outer side welding gun is 7-10 degrees, the welding parameters of the back wire are larger, the welding seam is prevented from being burnt through and protruding, the width of the welding seam is increased, and the appearance forming quality of the welding seam is improved.
5. The U-rib double-side double-arc synchronous asymmetric penetration welding process according to claim 2, which is characterized in that: in the step (3), the internal welding machine is a direct-current power supply, the polarity is direct-current reverse connection, the welding current is 350-420A, and the voltage is 32-36V; in the step (3), the external welding machine is a direct current power supply, the polarity is direct current reverse connection, the welding current is 500-580A, and the voltage is 32-36V.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634955A (en) * | 2021-09-10 | 2021-11-12 | 安徽宏源钢构有限公司 | One-step forming equipment for penetration weld |
| CN114289839A (en) * | 2021-12-17 | 2022-04-08 | 中铁宝桥（扬州）有限公司 | Welding wire alignment method for U-rib gas shielded welding |
| CN115430887A (en) * | 2021-06-04 | 2022-12-06 | 南通振华重型装备制造有限公司 | Full penetration welding method for 16mmU rib with hot-rolled variable cross section of extra-large bridge |
| CN116475578A (en) * | 2023-05-24 | 2023-07-25 | 南京斯迪兰德机械科技有限公司 | New energy automobile battery box arc welding process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584196A (en) * | 2017-09-14 | 2018-01-16 | 武汉天高熔接股份有限公司 | Long-lived Orthotropic Steel Bridge Deck is remained silent the welding procedure of rib |
| CN108687429A (en) * | 2018-07-26 | 2018-10-23 | 华电曹妃甸重工装备有限公司 | The double electric double wire hidden arc welding welding methods of high-strength steel sheet |
| WO2019228304A1 (en) * | 2018-05-28 | 2019-12-05 | 湖北天高桥梁工程有限公司 | Manufacturing tool for welding u-shaped rib of orthotropic plate unit, and assembly line and method |
| CN110560905A (en) * | 2019-09-18 | 2019-12-13 | 佛山科学技术学院 | Laser-arc hybrid welding process for high-strength steel plate for medium-thickness ship |
| CN110666290A (en) * | 2019-10-28 | 2020-01-10 | 中铁山桥集团有限公司 | Full penetration welding method for U-shaped rib angle welding seam |
-
2020
- 2020-12-01 CN CN202011374341.7A patent/CN112589235A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584196A (en) * | 2017-09-14 | 2018-01-16 | 武汉天高熔接股份有限公司 | Long-lived Orthotropic Steel Bridge Deck is remained silent the welding procedure of rib |
| WO2019228304A1 (en) * | 2018-05-28 | 2019-12-05 | 湖北天高桥梁工程有限公司 | Manufacturing tool for welding u-shaped rib of orthotropic plate unit, and assembly line and method |
| CN108687429A (en) * | 2018-07-26 | 2018-10-23 | 华电曹妃甸重工装备有限公司 | The double electric double wire hidden arc welding welding methods of high-strength steel sheet |
| CN110560905A (en) * | 2019-09-18 | 2019-12-13 | 佛山科学技术学院 | Laser-arc hybrid welding process for high-strength steel plate for medium-thickness ship |
| CN110666290A (en) * | 2019-10-28 | 2020-01-10 | 中铁山桥集团有限公司 | Full penetration welding method for U-shaped rib angle welding seam |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115430887A (en) * | 2021-06-04 | 2022-12-06 | 南通振华重型装备制造有限公司 | Full penetration welding method for 16mmU rib with hot-rolled variable cross section of extra-large bridge |
| CN113634955A (en) * | 2021-09-10 | 2021-11-12 | 安徽宏源钢构有限公司 | One-step forming equipment for penetration weld |
| CN114289839A (en) * | 2021-12-17 | 2022-04-08 | 中铁宝桥（扬州）有限公司 | Welding wire alignment method for U-rib gas shielded welding |
| CN116475578A (en) * | 2023-05-24 | 2023-07-25 | 南京斯迪兰德机械科技有限公司 | New energy automobile battery box arc welding process |
| CN116475578B (en) * | 2023-05-24 | 2023-11-14 | 南京斯迪兰德机械科技有限公司 | New energy automobile battery box arc welding process |
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Application publication date: 20210402 |