CN112404653B - Steel box girder U-rib external welding arc striking device and seamless butt joint method - Google Patents
Steel box girder U-rib external welding arc striking device and seamless butt joint method Download PDFInfo
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- CN112404653B CN112404653B CN202011365882.3A CN202011365882A CN112404653B CN 112404653 B CN112404653 B CN 112404653B CN 202011365882 A CN202011365882 A CN 202011365882A CN 112404653 B CN112404653 B CN 112404653B
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- 238000003466 welding Methods 0.000 title claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 210000001503 joint Anatomy 0.000 title claims abstract description 18
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
-
- 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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- Engineering & Computer Science (AREA)
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- Plasma & Fusion (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a welding arc striking device and a seamless butt joint method for the steel box girder U rib outer welding, which can effectively solve the problem that welding guns at two ends are difficult to reach the steel box girder U rib outer welding arc striking device and the seamless butt joint method which can not realize continuous welding. The advantages are that: firstly, the weight is light, the rigidity is high, and the problem of continuous arc welding of the U-shaped rib end can be effectively solved; the installation, the use and the disassembly are convenient, and the applicability is strong; thirdly, the angle of the clamping plate can be used for external welding of various U ribs after being adjusted; and fourthly, technical measures such as sliding, elastic compression, splicing and the like are adopted, so that the construction safety and practicality are effectively ensured, and the operation difficulty is reduced.
Description
Technical Field
The invention relates to a steel box girder U-rib external welding arc striking device and a seamless butt joint method, which can effectively solve the problem that welding guns at two ends are difficult to reach the steel box girder U-rib external welding arc striking device which can not realize continuous welding when the steel box girder U-rib external welding is carried out, and belongs to the manufacturing field of the steel box girder U-rib external welding arc striking device.
Background
The problem of fatigue of orthotropic steel bridge deck boards has attracted great attention from the industry, and improving the welding quality of U ribs has become one of the important ways to solve the problem of fatigue. Compared with the traditional single-side groove welding process, the U-rib double-sided welding ensures that the opening, closing and deformation of the welding root of the original single-side welding under alternating load are restrained, and has certain benefit for improving the fatigue performance. The inner welding track is arranged in the U rib during double-sided welding, so that continuous arc welding can be realized, and the quality can be ensured. The U-rib external welding mainly adopts a submerged-arc automatic welding process, and a welding device of external welding equipment mainly comprises a detector, a flux conveying pipe, a welding gun, a flux recovery device and the like. The welding gun is positioned behind the detector and the flux conveying pipe and is about 100mm away from the detector, when the detector reaches the end of the U-shaped rib, the welding gun does not reach the end, the end area cannot be welded, and an arc needs to be broken at the end area. As shown in fig. 5.
Because the outer welding equipment can not solve the problem, the existing most effective mode is to arrange a special arc striking device at the end of the U rib to solve the problem of outer welding arc breaking, but because the two short sides are integrally cut back when the plate unit is manufactured, the lengths of the steel plates are different, the U rib is assembled with deviation, the distance L between the U rib and the end is different, and the outer welding problem is difficult to manufacture standard process equipment. The self-made striking plate of each factory cannot be universal due to different end head amounts of the plate units.
Disclosure of Invention
The design purpose is as follows: the defects in the background art are avoided, and the arc striking device and the seamless butt joint method for the U-rib external welding of the steel box girder are designed to effectively solve the problem that welding guns at two ends are difficult to reach the steel box girder which cannot realize continuous welding when the U-rib external welding of the steel box girder is performed, so that the welding gun of external welding equipment is effectively ensured to continuously slide to the end part, and the welding operation is ensured to continuously break the arc, thereby improving the welding quality of the U-rib and the fatigue resistance of a plate unit.
The design scheme is as follows: in order to achieve the above design objective. The invention aims at the characteristics that the continuous welding cannot be realized in the area between the end tracker and the welding gun head during the welding of the U-shaped rib, the distances between the end of the U-shaped rib and the edge of the plate are different, and the applicability of the fixed arc striking plate is poor. An adjustable process device is arranged at the end part of the U-shaped rib, so that the connecting plate of the device is spliced with the two end parts of the U-shaped rib in a seamless mode, a sliding joint plate (namely a sliding block) is arranged at the lower side of the connecting plate and can slide freely in a special sliding groove, the connecting plate of the clamping plate is adjusted, and the problem that the free edge amounts of the plate units are different is solved. After the device is installed in place, the surface level of the chute connecting plate and the inner surface level of the steel box girder plate unit are required to be simultaneously met, and the gap is smaller than 2mm, so that the purpose of striking an arc of the tracker is achieved.
In structural design, the steel box girder U-shaped rib external welding extension device comprises clamping plates (comprising clamping plate splice plates, clamping plate connecting plates, sliding joint plates, namely sliding blocks and bolts), sliding structures (comprising sliding grooves and connecting plates), retractors and the like. The splint splice plate is provided with a slotted hole and is connected with the U rib through bolts, the splint connection plate is obliquely arranged and parallel to two limbs of the U rib, one end of the splint connection plate is welded with the splice plate, and the other end of the splint connection plate is welded with the sliding joint plate. The sliding grooves of the sliding structure are machined, the surface roughness is not less than 12.5 mu m, and connecting plates are adopted at the two sides of the sliding grooves and between the two sliding grooves so as to ensure that external welding equipment can pass smoothly. The sliding joint board at the lower end of the clamping plate connecting plate is clamped inside the sliding groove and can freely slide in the sliding groove. One end of the expansion device is fixed on the clamping plate connecting plate, and the other end of the expansion device is connected on the stop rod of the chute, so that the expansion device can be effectively limited. When in use, the sliding chute and the connecting plate are spliced into a whole, and then the clamping plate is penetrated from one end. Install in board unit both ends, adopt the bolt location, carry out spacingly through the expansion bend at last, realize the seamless butt joint of striking device and board unit.
The technical requirements are as follows: (1) the width of the chute slideway adopted by the invention is not less than 30mm, the height is not less than 7mm, and the total height is not less than 20mm, so that the strength of the chute is ensured, and smooth sliding is realized. (2) The slideway needs to be machined, and the surface roughness is not less than 12.5 mu m so as to ensure the sliding effect. (3) The end of the connecting plate of the clamping plate is provided with an arc so as to fill the welding hole of the end of the U-shaped rib. (4) The upper surface level of the chute connecting plate and the staggered edge of the plate unit are not more than 1mm, and the gap is not more than 2mm.
Technical scheme 1: the utility model provides a steel case roof beam U rib external weld arc striking device, spout and connecting plate are connected into wholly, splint splice plate and splint connecting plate are connected, and the slider is located the spout, and splint connecting plate bottom is connected with the slider and the slider freely slides in the spout, and arc striking device installs at the board unit both ends that comprise two splint splice plates and adopts the fastener to fix, and the expansion bend one end is fixed on splint connecting plate, and the expansion bend other end is connected on the dead lever of spout.
Technical scheme 2: a seamless butt joint method of a U-rib external welding arc striking device of a steel box girder and a plate unit is characterized in that a clamping plate connecting plate is obliquely arranged and parallel to two limbs of the U-rib, one end of the clamping plate connecting plate is welded with a clamping plate splicing plate, the other end of the clamping plate connecting plate is welded with a sliding block, two sides of a sliding groove and two sliding grooves are connected by adopting a connecting plate positioning mode, the sliding block at the lower end of the clamping plate connecting plate is clamped in the sliding groove to slide freely, one end of a telescopic device is fixed on the clamping plate connecting plate, and the other end of the telescopic device is connected to a stop rod of the sliding groove to effectively limit; when the arc striking device is used, firstly, the sliding chute and the connecting plate are spliced into a whole, then the connecting plate with the sliding block penetrates through one end of the connecting plate, the arc striking device is arranged at two ends of a plate unit formed by two connecting plates with the clamping plates and positioned by adopting a fastener, and finally, the arc striking device and the plate unit are in seamless butt joint through limiting through the telescopic device.
Compared with the background technology, the invention has light weight and high rigidity, and can effectively solve the problem of continuous arc welding of the U-shaped rib end; the installation, the use and the disassembly are convenient, the safety and the reliability are high, the convenience and the practicability are high; thirdly, the function is strong, the applicability is strong, and the clamping plate angle can be used for external welding of various U ribs after being adjusted; and fourthly, technical measures such as sliding, elastic compression, splicing and the like are adopted, so that the construction safety and practicality are effectively ensured, and the operation difficulty is reduced.
Drawings
Fig. 1 is a schematic view of a main view structure of an arc striking device for U-rib external welding of a steel box girder.
Fig. 2 is a side view schematic of fig. 1.
Fig. 3 is an enlarged schematic view of the chute, the slider and the slider-clamping plate connection plate.
Fig. 4 is a schematic view of the connection of the striking device to the plate unit.
Fig. 5 is a schematic diagram of the background art.
Detailed Description
Example 1: reference is made to fig. 1-4. The utility model provides a steel case roof beam U rib external weld striking device, spout 5 is connected into whole with connecting plate 4, splint splice plate 1 and splint connecting plate 2 are connected, slider 3 is located spout 5, splint connecting plate 2 bottom is connected with slider 3 and slider 3 freely slides in spout 5, striking device installs at the board unit both ends that constitute by two splint splice plates 1 and adopts fastener 6 to fix, expansion bend 8 one end is fixed on splint connecting plate 2, expansion bend 8 other end is connected on the dead lever of spout. The upper surface of the arc striking device is flush with the top surface of the chute connecting plate 4, and the gap between the connecting plate and the plate unit is smaller than 2mm. The arc chamfer at the end part of the splint connecting plate 2 is inlaid at the welding hole of the U-shaped rib, and the splint splice plate 1 is closely attached to two limbs of the U-shaped rib. The clamp splice plate (1) is relatively provided with the compressor fixing bolt 7, and the compressor fixing bolt 7 is assembled and welded on the clamp connecting plate, and is mainly used for fixing the telescopic device 8, so that the sliding chute cannot move under the action of elasticity in the welding process. The included angle between the lower end of the clamping plate connecting plate 2 and the sliding block 3 is 79 degrees plus or minus 0.5, and the included angle is consistent with the angles of two limbs of the U-shaped rib, mainly for ensuring the interface matching performance. And + -0.5 may meet the requirements.
The seamless butt joint method of the arc striking device and the plate unit of the U-shaped rib external welding of the steel box girder comprises the steps that a clamping plate connecting plate 2 is obliquely arranged and parallel to two limbs of the U-shaped rib, one end of the clamping plate connecting plate 2 is welded with a clamping plate splice plate 1, the other end of the clamping plate connecting plate 2 is welded with a sliding block 3, two sides of a sliding groove 5 and two sliding grooves 5 are in positioning connection by adopting a connecting plate 4, the sliding block 3 at the lower end of the clamping plate connecting plate 2 is clamped in the sliding groove 5 to slide freely, one end of a telescopic device 8 is fixed on the clamping plate connecting plate 2, and the other end of the telescopic device is connected to a stop rod of the sliding groove to perform effective limiting; when the arc striking device is used, firstly, the sliding chute 5 and the connecting plate 4 are spliced into a whole, then the clamping plate connecting plate 2 with the sliding block 3 penetrates from one end, the arc striking device is arranged at two ends of a plate unit formed by two clamping plate splice plates 1 and is positioned by adopting the fastening pieces 6, and finally, the arc striking device and the plate unit are in seamless butt joint through limiting through the telescopic device 8.
The seamless butt joint of the arc striking device is mainly satisfied by the following modes: (1) the included angle between the clamping plate connecting plate 2 and the sliding block 3 is 79 degrees (tolerance: ±0.5) which meets the requirement; (2) the chute connecting plate 4 is flush with the steel box girder plate unit; (3) spring force of the compressor 8.
After the arc striking device is installed in place, the matching condition of the clamping plate connecting plate 2, the sliding groove connecting plate 4 and the steel box girder plate unit is checked, after the misalignment amount is less than 1mm, the free end of the compressor 8 is connected to the compressor fixing bolt 7, and then the seamless butt joint of the arc striking device and the plate unit can be realized. (the position of the fixing bolt 7 is determined by test according to the elastic force of the compressor 8 and the weight of the device, and after the fixing bolt is connected in principle, no gap exists between the arc striking device and the plate unit under the action of the elastic force).
It should be understood that: although the above embodiments describe the design concept of the present invention in more detail, these descriptions are merely descriptions of the design concept of the present invention, and not limitations on the design concept of the present invention, and any combination, addition or modification not exceeding the design concept of the present invention falls within the scope of the present invention.
Claims (4)
1. A seamless butt joint method of a U-rib external welding arc striking device of a steel box girder and a plate unit is characterized in that: the device comprises two sliding grooves (5) and a connecting plate (4), wherein the two sides of the sliding grooves (5) and the two sliding grooves (5) are connected by the connecting plate (4), and the sliding grooves (5) are connected with the connecting plate (4) into a whole; the clamping plate splice plate (1) is connected with the clamping plate connecting plate (2), the sliding block (3) is positioned in the sliding groove (5), the sliding groove (5) is machined, the surface roughness is not less than 12.5 micrometers, the width of the sliding groove (5) is not less than 30mm, the height is not less than 7mm, the end of the clamping plate connecting plate is provided with an arc so as to fill a welding hole at the end of the U-shaped rib, the bottom of the clamping plate connecting plate (2) is connected with the sliding block (3), and the sliding block (3) freely slides in the sliding groove (5); the arc striking device is arranged at two ends of a plate unit formed by two clamping plate splice plates (1) and is fixed by adopting a fastener (6), one end of a telescopic device (8) is fixed on the clamping plate connecting plate (2), and the other end of the telescopic device (8) is connected on a stop rod of a chute; the clamping plate connecting plates (2) are obliquely arranged and parallel to two limbs of the U-shaped rib, one end of each clamping plate connecting plate (2) is welded with the corresponding clamping plate splice plate (1), the other end of each clamping plate connecting plate (2) is welded with the corresponding sliding block (3), the two sides of each sliding groove (5) and the two sliding grooves (5) are connected in a positioning mode through the connecting plates (4), the sliding blocks (3) at the lower ends of the clamping plate connecting plates (2) are clamped in the sliding grooves (5) to slide freely, one end of each telescopic device (8) is fixed on the corresponding clamping plate connecting plate (2), and the other end of each telescopic device is connected to the corresponding stop rod of each sliding groove to limit effectively; when the arc striking device is used, firstly, the sliding groove (5) and the connecting plate (4) thereof are spliced into a whole, then the clamping plate connecting plate (2) with the sliding block (3) penetrates from one end, the arc striking device is arranged at two ends of a plate unit formed by two clamping plate splice plates (1) and is positioned by adopting a fastening piece (6), and finally, the expansion joint (8) is used for limiting, so that the seamless butt joint of the arc striking device and the plate unit is realized.
2. The seamless butt joint method of the steel box girder U-rib external welding arc striking device and the plate unit according to claim 1, wherein the method comprises the following steps: the arc chamfer at the end part of the clamping plate connecting plate (2) is inlaid at the welding hole of the U-shaped rib, and the clamping plate splice plate (1) is closely attached to two limbs of the U-shaped rib.
3. The seamless butt joint method of the steel box girder U-rib external welding arc striking device and the plate unit according to claim 1, wherein the method comprises the following steps: the splint splice plate (1) is provided with a compressor fixing bolt (7) relatively.
4. The seamless butt joint method of the steel box girder U-rib external welding arc striking device and the plate unit according to claim 1, wherein the method comprises the following steps: the included angle between the lower end of the splint connecting plate (2) and the sliding block (3) is 79 degrees plus or minus 0.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011365882.3A CN112404653B (en) | 2020-11-29 | 2020-11-29 | Steel box girder U-rib external welding arc striking device and seamless butt joint method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011365882.3A CN112404653B (en) | 2020-11-29 | 2020-11-29 | Steel box girder U-rib external welding arc striking device and seamless butt joint method |
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| CN112404653A CN112404653A (en) | 2021-02-26 |
| CN112404653B true CN112404653B (en) | 2024-01-12 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407397A (en) * | 2011-09-15 | 2012-04-11 | 海波重型工程科技股份有限公司 | Construction method for improving fatigue strength of welding joint of orthotropic steel bridge deck |
| CN102699492A (en) * | 2012-06-21 | 2012-10-03 | 中铁宝桥（扬州）有限公司 | Gate-type multi-electrode welding device and U rib plate welding method employing same |
| CN106312353A (en) * | 2016-10-19 | 2017-01-11 | 武船重型工程股份有限公司 | U-shaped rib welding device and method |
| CN106563868A (en) * | 2016-10-18 | 2017-04-19 | 武船重型工程股份有限公司 | Two-sided welding method for U-shaped ribbed slab unit welding seam |
| CN108526741A (en) * | 2018-04-19 | 2018-09-14 | 中铁宝桥集团有限公司 | A kind of welding structure and its welding method of steel bridge Beam Plate Elements ribbed stiffener end |
| CN110605494A (en) * | 2019-10-10 | 2019-12-24 | 清华大学 | Detachable assembled steel box girder U rib structure and process |
-
2020
- 2020-11-29 CN CN202011365882.3A patent/CN112404653B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407397A (en) * | 2011-09-15 | 2012-04-11 | 海波重型工程科技股份有限公司 | Construction method for improving fatigue strength of welding joint of orthotropic steel bridge deck |
| CN102699492A (en) * | 2012-06-21 | 2012-10-03 | 中铁宝桥（扬州）有限公司 | Gate-type multi-electrode welding device and U rib plate welding method employing same |
| CN106563868A (en) * | 2016-10-18 | 2017-04-19 | 武船重型工程股份有限公司 | Two-sided welding method for U-shaped ribbed slab unit welding seam |
| CN106312353A (en) * | 2016-10-19 | 2017-01-11 | 武船重型工程股份有限公司 | U-shaped rib welding device and method |
| CN108526741A (en) * | 2018-04-19 | 2018-09-14 | 中铁宝桥集团有限公司 | A kind of welding structure and its welding method of steel bridge Beam Plate Elements ribbed stiffener end |
| CN110605494A (en) * | 2019-10-10 | 2019-12-24 | 清华大学 | Detachable assembled steel box girder U rib structure and process |
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| CN112404653A (en) | 2021-02-26 |
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Effective date of registration: 20230620 Address after: 721006 No.80 Qingjiang Road, Weibin District, Baoji City, Shaanxi Province Applicant after: CHINA RAILWAY BAOJI BRIDGE GROUP Co.,Ltd. Applicant after: Shenzhen Medium Channel Management Center Address before: No.4 Huoju Road, hi tech Development Zone, Baoji City, Shaanxi Province 721000 Applicant before: CHINA RAILWAY BAOJI BRIDGE GROUP Co.,Ltd. |
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