CN112276303B - Stainless steel U-shaped rib butt welding method with water drainage function - Google Patents
Stainless steel U-shaped rib butt welding method with water drainage function Download PDFInfo
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- CN112276303B CN112276303B CN202011144786.6A CN202011144786A CN112276303B CN 112276303 B CN112276303 B CN 112276303B CN 202011144786 A CN202011144786 A CN 202011144786A CN 112276303 B CN112276303 B CN 112276303B
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
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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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
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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
- B23K9/16—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
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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
- B23K9/235—Preliminary treatment
Abstract
The invention provides a stainless steel U-shaped rib butt welding method with a drainage function, wherein a stainless steel thin plate embedding section with a certain length is arranged between bridge panels of adjacent beam sections, and a stainless steel U-shaped rib embedding section with a certain length is arranged between stainless steel U-shaped ribs; water-soluble paper is adhered to one side, close to the butt-joint welding line, of the stainless steel U-shaped rib through hydrosol, the butt-joint welding line is sealed through adhesive tape paper, the uppermost adhesive tape paper is provided with an exhaust hole, and the stainless steel U-shaped rib, the bridge deck plate, the water-soluble paper on two sides of the butt-joint welding line and the stainless steel U-shaped rib embedding section form a local closed space together; and the side surface of the stainless steel U-shaped rib embedding section is provided with an inflation hole for inflating protective gas. The invention utilizes water-soluble paper to artificially manufacture a closed space around the butt welding seam, solves the problem that the protective gas is inconvenient to fill, and realizes that the welding protective gas is filled in a narrow, long and narrow space with barriers.
Description
Technical Field
The invention relates to the technical field of U-shaped rib butt welding, in particular to a stainless steel U-shaped rib butt welding method with a water drainage function.
Background
Orthotropic steel deck slab is one of the important structural members of steel structural bridges, and is generally composed of a deck slab and U-shaped ribs at the bottom thereof. The top of the bridge deck is a concrete bridge deck, and the U-shaped ribs at the bottom play the roles of increasing rigidity and resisting fatigue. With the continuous innovation and improvement of bridge technology, in some bridge structures, in order to increase the drainage function of the bridge deck on the basis of the original bridge deck plate, the material of part of U-shaped ribs is replaced by stainless steel from carbon steel, meanwhile, a layer of stainless steel thin plate is arranged on the bottom surface of the carbon steel bridge deck plate corresponding to the stainless steel U-shaped ribs, and a corrosion-resistant drainage space is formed by the stainless steel thin plate and the stainless steel U-shaped ribs, so that the drainage function is realized, and refer to fig. 1-3.
The steel structure bridge adopts a sectional manufacturing process, each bridge deck block is about 16 meters or 18 meters long, and usually, the bridge deck blocks are connected by welding, and U-shaped ribs are connected by welding or bolting. When the U-shaped ribs are made of stainless steel and the requirements for the use of the deck drainage structure are increased, the U-shaped ribs between two deck slabs can only be connected by welding. The mode of inboard subsides steel liner is generally adopted in current U-shaped rib butt welding, but to the bridge floor that has the drainage demand, the steel liner not only can influence the smooth and easy degree of rivers, and the gap department between steel liner and the U-shaped rib deposits debris or ponding easily moreover, influences overall structure's corrosion resistance.
The stainless steel used for the drainage function is generally a ferritic-austenitic duplex stainless steel of european standard EN 10088-1:2005, model number X2CrNiMoN22-5-3, brand number 1.4462. The stainless steel has the advantages of austenitic stainless steel and ferritic steel, and has low hot cracking tendency and embrittlement tendency. In order to achieve good properties in such duplex stainless steels, the ferrite and austenite contents are typically 50% each. In order to ensure that the performance of the stainless steel welding seam can meet the requirement, the content of ferrite in the welding seam and the heat affected zone is between 30 and 70 percent according to the specification in the standard. Therefore, it is necessary to find a welding process suitable for such duplex stainless steel to secure various properties of the weld metal.
The austenite-ferrite duplex stainless steel is less applied to bridge structures, and the welding process of the austenite-ferrite duplex stainless steel needs to be researched. The research proposes that the tungsten electrode argon arc welding is adopted to weld the stainless steel U-shaped rib butt weld, but the following technical difficulties exist:
1. in the welding process, inert gas is filled into the back of the welding line for protection, so that the metal of the welding line is prevented from being oxidized. In consideration of the particularity of the bridge structure, the scheme of plugging two ends of the U-shaped rib which is thirty meters or more and longer and then inflating the U-shaped rib inwards is time-consuming, labor-consuming and resource-consuming, and cannot ensure that the gas in a welding seam area reaches the required purity, so the scheme is not preferable. If a local protection device for a welding seam is manufactured, after the local protection device extends into a stainless steel U-shaped rib from the end of a beam section, the local air-following at the back of the welding seam is protected, and a drainage structure arranged in the space of the stainless steel U-shaped rib can block the protection device from advancing, so that the protection device cannot reach a to-be-welded area of a butt welding seam of the stainless steel U-shaped rib.
2. The argon tungsten-arc welding speed is very slow, the efficiency is lower, the bridge structure has more stainless steel U-shaped ribs, and the work efficiency is greatly reduced by only using the argon tungsten-arc welding.
On the premise that the inner side of the butt weld of the U-shaped stainless steel rib does not allow a liner to be used, the welding difficulty of the butt weld is greatly improved, because the metal fluidity of the stainless steel is different from that of common carbon steel, particularly when austenite-ferrite duplex stainless steel is welded, the fluidity of molten iron is poor, a molten pool is difficult to control during vertical position and overhead position welding, and the forming quality of the inner side of the weld is difficult to ensure when conventional gas shielded welding and shielded metal arc welding are used for welding backing weld beads. Meanwhile, due to the influence of manufacturing precision, when two bridge panels more than ten meters in length are butted on an assembly site, the pre-welding assembly gap of the stainless steel U-shaped rib butt weld is difficult to ensure to be completely within the required tolerance, and if the back surface is not welded by using a liner, the quality of the pre-welding assembly gap directly influences the quality of the butt weld.
Disclosure of Invention
Aiming at the technical problems in the existing U-shaped rib butt welding process of orthotropic bridge deck plates for draining water from bridge decks by means of stainless steel U-shaped ribs, the invention provides a stainless steel U-shaped rib butt welding method with a draining function.
A stainless steel U-shaped rib butt welding method with a drainage function is characterized in that a stainless steel thin plate embedding section with a certain length is arranged between bridge deck plates of adjacent beam sections, and a stainless steel U-shaped rib embedding section with a certain length is arranged between stainless steel U-shaped ribs; water-soluble paper is adhered to one side, close to the butt-joint welding line, of the stainless steel U-shaped rib through hydrosol, the butt-joint welding line is sealed through adhesive tape paper, the uppermost adhesive tape paper is provided with an exhaust hole, and the stainless steel U-shaped rib, the bridge deck plate, the water-soluble paper on two sides of the butt-joint welding line and the stainless steel U-shaped rib embedding section form a local closed space together; and the side surface of the stainless steel U-shaped rib embedding section is provided with an inflation hole for inflating protective gas.
Furthermore, the inflation hole is a funnel-shaped hole with a large outer part and a small inner part, the inner side aperture is 8-10mm, and the outer side aperture is 18-20 mm.
Further, the distance between the bonding position of the water-soluble paper and the butt welding seam is more than 150 mm.
Further, the welding method comprises the following steps:
1. assembling and welding the stainless steel thin plate embedding section; the welding adopts the oxygen gas shielded welding and the overhead welding, the welding material is an E309LT1-1 flux-cored wire with the diameter of 1.2mm, the welding current is 160-180A, the welding voltage is 26-28V, and the gas flow is 15-20L/min.
2. Sticking water-soluble paper on one side, close to the butt weld, of the stainless steel U-shaped rib by using hydrosol;
3. the side surface of the stainless steel U-shaped rib embedding section is provided with an inflation hole for inflating protective gas;
4. assembling the stainless steel U-shaped rib embedding sections, and welding fillet welds between the stainless steel U-shaped rib embedding sections and the bridge deck plates to form backing weld beads;
5. sealing the butt welding seam by using adhesive tape paper, and only reserving an exhaust hole at the uppermost end;
6. inserting an inflation conduit from the inflation hole, and filling protective gas into the inner space of the stainless steel U-shaped rib to gradually exhaust air from the exhaust hole at the upper end;
7. welding stainless steel U-shaped rib embedding section butt weld joints, which comprises 2 tungsten electrode argon arc welding backing weld bead welding, 1 dioxygen gas shielded welding filling weld bead welding and 2 dioxygen gas shielded welding cover bead welding, wherein the welding process of the 1 st backing weld bead comprises 80-100A of current, 13-14V of voltage and 3-6cm/min of speed, the welding process of the 2 nd backing weld bead comprises 90-120A of current, 13.5-15V of voltage and 5-9cm/min of speed, the gas flow is 8-15L/min of speed, the welding materials of the 2 backing weld bead are ER2209 solid welding wires, and the diameter of the welding wires is 2.4 mm; the welding material of the filling weld bead and the cover weld bead is an E2209T1-1 flux-cored wire with the diameter of 1.2mm, and the welding process comprises the following steps of current 120-160A, welding voltage 22-26V, welding speed 8-25cm/min and gas flow 15-20L/min.
8. Welding and plugging the inflation hole;
9. and welding residual weld beads of fillet welds between the stainless steel U-shaped rib embedding sections and the bridge deck plate.
Further, performing 100% PT flaw detection after the step 1 is finished for 24 hours, and assembling a stainless steel U-shaped rib embedding section; and 7, performing 100% PT flaw detection after completing the step 24 hours, welding and plugging the inflation hole by adopting argon tungsten-arc welding after the flaw detection is qualified, and performing 100% PT flaw detection after completing the welding and plugging of the inflation hole for 24 hours.
Furthermore, the groove of the butt weld of the stainless steel U-shaped rib embedding section is a bilateral V-shaped groove, the truncated edge is 0mm, the angle of the groove is 60 +/-5 degrees, and the gap is 3-5 mm.
The invention has the beneficial effects that: 1. the water-soluble paper is used for manually manufacturing a closed space around the butt-joint welding seam, so that the problem that the protective gas is inconvenient to fill is solved, the welding protective gas is filled in a narrow, long and narrow space with barriers inside, and a liner is not needed; 2. the adopted welding process is convenient to operate, the welding is standard, the parameters are reasonable, the welding process evaluation test verifies that the appearance and the internal quality of the welding seam are qualified, the tensile and bending properties of the joint are qualified, and the ferrite content meets the standard requirement; 3. the welding process combining argon tungsten-arc welding and carbon dioxide gas shielded welding is adopted, so that the quality of a bottoming weld bead can be ensured, and the overall welding efficiency of the project can be improved.
Drawings
FIG. 1 is a cross-section of a steel deck and a stainless steel U-rib structure for bridge construction;
FIG. 2 is a sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic structural view of a stainless steel U-rib embedment section between adjacent beam sections;
FIG. 5 is a schematic view of the stainless steel U-shaped rib insertion section inflation port;
FIG. 6 is a schematic view of the assembly and welding sequence of the components;
FIG. 7 is a view of a weld layout of a stainless steel U-rib panel construction;
FIG. 8 is a schematic representation of the joint and groove form of weld 11;
fig. 9 is a schematic view of the bead arrangement of the weld 11, and numerals (r) - (v) are bead numbers.
Description of the reference numerals: 1. a bridge deck; 2. a stainless steel U-shaped stiffener; 3. a bridge deck drainage structure; 4. a stainless steel sheet; 5. a stainless steel U-shaped rib embedding section; 6. a stainless steel sheet embedding section; 7. an inflation hole; 8. water-soluble paper; 9. butt welding of bridge decks between beam sections; 10. the stainless steel sheet is in butt welding with the embedded section; 11. the stainless steel U-shaped stiffening rib is in butt welding with the embedding section; 12, groove fillet weld between the stainless steel U-shaped rib embedding section and the bridge deck plate; 13. the air inflation hole seals the welding seam.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings and the specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example 1
In order to ensure that the butt welding gap is within the allowable range, a stainless steel thin plate insertion section 6 with a certain length (such as 30 cm) is arranged between the bridge deck plates 1 of the adjacent beam sections, and a stainless steel U-shaped rib insertion section 5 with a certain length (such as 50 cm) is arranged between the stainless steel U-shaped ribs 2, and refer to fig. 4. The length of the actual embedded section of the stainless steel U-shaped rib is set according to actual measurement data after the on-site beam section is assembled and welded, and the principle is to ensure the gap of the butt weld. The stainless steel U-shaped rib embedding section is processed by adopting a machine tool to finish, the precision of the truncated edge and the opening size is strictly ensured, and the welding quality is further ensured.
Aiming at the problem that inert gas with a protective effect needs to be filled into the back of a welding seam, the metal of the welding seam is prevented from being oxidized, the drainage structure arranged in the space of the stainless steel U-shaped rib can block the travelling of the local protection device stretching into the welding seam from the end of a beam section, and the local protection device can not reach the region to be welded of the butt welding seam of the stainless steel U-shaped rib.
And (3) sticking water-soluble paper 8 on one side of the stainless steel U-shaped rib 2 close to the butt weld by using hydrosol. Firstly, cutting water-soluble paper into a proper size according to the cross section size of a stainless steel U rib, and reserving a margin of 3-5cm for pasting; and then adhering water-soluble paper to the inner wall of the stainless steel U-shaped rib by using hydrosol. In order to ensure that the hydrosol does not lose its effect due to heating, the bonding position should be more than 150mm away from the weld. Before bonding, the surface of the steel plate in the region to be bonded is cleaned to prevent the bonding effect from being affected.
In order to manufacture a relatively closed space, the butt welding seam is sealed by using adhesive tape paper, and only the uppermost adhesive tape paper is provided with an exhaust hole with the diameter of about 1cm, so that the stainless steel U-shaped rib, the bridge deck plate, the water-soluble paper on two sides of the butt welding seam and the embedded section of the stainless steel U-shaped rib form a local closed space together.
Through the gas filling hole 7 provided in the side of the stainless steel U-shaped rib insertion section, as shown in fig. 5, a protective gas such as argon gas is filled. The argon gas has higher density than air, and can uniformly and gradually replace air from the bottom to discharge the air from the exhaust hole at the uppermost end. The air flow can be controlled at 25-30L/min, and the aeration time is more than 5 min. The aeration hole can be positioned in the middle of the length of the stainless steel U-shaped rib embedding section, and the middle of the height is slightly deviated to the side of the bridge deck.
The gas charging hole is preferably a funnel-shaped hole with a large outer part and a small inner part, the inner side aperture is 8-10mm, the outer side aperture is 18-20mm, and after the butt weld of the embedded and repaired section of the stainless steel U-shaped rib is welded, the embedded and repaired section of the stainless steel U-shaped rib is welded and blocked by argon tungsten-arc welding.
Example 2
The stainless steel U-shaped rib butt welding method based on the embodiment 1, as shown in FIGS. 6 to 7, includes the following steps:
1. assembling and welding a stainless steel thin plate embedding section with the thickness of 5mm, adopting dioxygen gas shielded welding and overhead welding, wherein the welding material is an E309LT1-1 flux-cored wire with the diameter of 1.2mm, the welding current is 180A, the welding voltage is 26-28V, and the gas flow is 15-20L/min.
2. And (3) carrying out 100% PT flaw detection after the stainless steel sheet embedding section is welded for 24 hours, trial installing the stainless steel U-shaped rib embedding section after flaw detection is qualified, checking a butt weld groove of the stainless steel U-shaped rib embedding section, wherein the groove is required to be a bilateral V-shaped groove, the truncated edge is 0mm, the groove angle is 60 +/-5 degrees, the gap is 3-5mm, referring to FIG. 8, and carrying out grinding treatment until the requirement is met if the requirement is not met.
3. Assembling the stainless steel U-shaped rib embedding section on a bridge deck plate, welding a fillet weld between the stainless steel U-shaped rib embedding section and the bridge deck plate by adopting oxygen gas shielded welding to form a bottom weld bead, wherein the welding material is an E309LT1-1 flux-cored wire, the diameter is 1.2mm, the welding current is 160-180A, the welding voltage is 26-28V, and the gas flow is 15-20L/min.
4. The butt welding seam is sealed by using the adhesive tape paper, and only the uppermost adhesive tape paper is provided with the vent holes with the diameter of about 1cm, so that the stainless steel U-shaped ribs, the bridge deck plate and the water-soluble paper on the two sides of the butt welding seam and the embedded sections of the stainless steel U-shaped ribs form local closed spaces together.
5. And filling protective gas from the gas filling hole, backing weld beads of the butt weld joint of the U-shaped stainless steel rib embedding section by adopting argon tungsten-arc welding, and welding, wherein adhesive tapes attached to the butt weld joint are removed in a segmented manner in the welding process so as to ensure the protective effect of the internal gas. The welding material is ER2209 solid welding wire, the diameter of the welding wire is 2.4mm, the first welding process of the backing weld bead is that the current is 80-100A, the voltage is 13-14V, the speed is 3-6cm/min, and the second welding process of the backing weld bead is that the current is 90-120A, the voltage is 13.5-15V, the speed is 5-9cm/min, and the air flow is 8-15L/min.
6. Welding a filling weld bead of a butt-joint weld joint of a stainless steel U-shaped rib embedding section, a cover weld bead, a welding material E2209T1-1 flux-cored wire with the diameter of 1.2mm, welding current of 120 and 160A, welding voltage of 22-26V, welding speed of 8-25cm/min and gas flow of 15-20L/min by adopting oxygen gas shielded welding. FIG. 9 is a schematic view of a stainless steel U-shaped rib insert butt weld for 5 passes.
7. And (3) carrying out 100% PT flaw detection after the stainless steel U-shaped rib embedding section butt weld joint is welded for 24 hours, welding and plugging the inflation hole by adopting argon tungsten arc welding after the flaw detection is qualified, filling protective gas into the interior before welding the inflation hole, and carrying out 100% PT flaw detection after the inflation hole plugging and welding are finished for 24 hours.
8. Welding the residual weld bead of the fillet weld between the stainless steel U-shaped rib repair section and the bridge deck plate by adopting oxygen gas shielded welding, wherein the welding material is an E309LT1-1 flux-cored wire, the diameter is 1.2mm, the welding current is 160-.
The interlayer temperature of all the above-mentioned welding is controlled below 100 deg.C.
Finally, it is also noted that the above list is only one specific embodiment of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (8)
1. A stainless steel U-shaped rib butt welding method with a drainage function is characterized in that a 30cm stainless steel thin plate embedding section is arranged between bridge panels of adjacent beam sections, and a 50cm stainless steel U-shaped rib embedding section is arranged between stainless steel U-shaped ribs; water-soluble paper is adhered to one side, close to the butt-joint welding line, of the stainless steel U-shaped rib through hydrosol, the butt-joint welding line is sealed through adhesive tape paper, the uppermost adhesive tape paper is provided with an exhaust hole, and the stainless steel U-shaped rib, the bridge deck plate, the water-soluble paper on two sides of the butt-joint welding line and the stainless steel U-shaped rib embedding section form a local closed space together; the side surface of the stainless steel U-shaped rib embedding section is provided with an inflation hole for inflating protective gas;
the air charging hole is a funnel-shaped hole with a large outer side and a small inner side, wherein the inner side aperture is 8-10mm, and the outer side aperture is 18-20 mm.
2. The method for welding a stainless steel U-shaped rib with a water draining function in a butt welding mode according to claim 1, wherein the distance between the bonding position of the water-soluble paper and the butt welding seam is larger than 150 mm.
3. The stainless steel U-shaped rib butt welding method with a water draining function according to claim 1 or 2, characterized by comprising the steps of:
step 1, assembling and welding a stainless steel thin plate embedding section;
step 2, sticking water-soluble paper on one side, close to the butt weld, of the stainless steel U-shaped rib by using hydrosol;
step 3, arranging an inflation hole for inflating protective gas on the side surface of the stainless steel U-shaped rib embedding section;
step 4, assembling the stainless steel U-shaped rib embedding sections, and welding fillet welds between the stainless steel U-shaped rib embedding sections and the bridge deck plate to form backing weld beads;
step 5, sealing the butt welding seam by using adhesive tape paper, and only leaving an exhaust hole at the uppermost end;
step 6, inserting an inflation conduit from the inflation hole, and filling protective gas into the inner space of the stainless steel U-shaped rib to ensure that air is gradually exhausted from the exhaust hole at the upper end;
step 7, welding a butt welding seam of the embedded section of the stainless steel U-shaped rib;
step 8, welding and plugging the inflation holes;
and 9, welding residual weld beads of fillet welds between the stainless steel U-shaped rib embedding sections and the bridge deck slab.
4. The butt welding method for the stainless steel U-shaped ribs with the water draining function as claimed in claim 3, wherein step 1 adopts oxygen gas shielded welding and overhead welding, the welding material is a flux-cored wire E309LT1-1, the diameter is 1.2mm, the welding current is 160-180A, the welding voltage is 26-28V, and the gas flow is 15-20L/min.
5. The stainless steel U-shaped rib butt welding method with the water drainage function according to claim 4, wherein the step 7 comprises 2 welding of backing pass of argon tungsten-arc welding, 1 welding of filling pass of oxygen gas shielded welding and 2 welding of cover pass of oxygen gas shielded welding, wherein the welding process of the backing pass of the 1 st welding is that the current is 80-100A, the voltage is 13-14V, the speed is 3-6cm/min, the welding process of the backing pass of the 2 nd welding is that the current is 90-120A, the voltage is 13.5-15V, the speed is 5-9cm/min, the air flow is 8-15L/min, the welding materials of the backing pass of the 2 nd welding are ER2209 solid welding wires, and the diameter of the welding wires is 2.4 mm; the welding material of the filling weld bead and the cover weld bead is an E2209T1-1 flux-cored wire with the diameter of 1.2mm, and the welding process comprises the following steps of current 120-160A, welding voltage 22-26V, welding speed 8-25cm/min and gas flow 15-20L/min.
6. The butt welding method of stainless steel U-shaped ribs with a water draining function according to claim 4, wherein the U-shaped rib repairing section is assembled after 100% PT inspection is performed 24 hours after completion of step 1.
7. The method for butt welding of stainless steel U-shaped ribs with a water draining function according to claim 4, wherein 100% PT flaw detection is performed 24 hours after completion of step 7, welding and plugging are performed on the inflation holes by argon tungsten-arc welding after passing flaw detection, and 100% PT flaw detection is performed 24 hours after completion of welding and plugging of the inflation holes.
8. The stainless steel U-shaped rib butt welding method with the water drainage function according to claim 4, wherein the butt weld groove of the stainless steel U-shaped rib embedding section is a double-sided V-shaped groove, the truncated edge is 0mm, the groove angle is 60 +/-5 degrees, and the gap is 3-5 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011144786.6A CN112276303B (en) | 2020-10-23 | 2020-10-23 | Stainless steel U-shaped rib butt welding method with water drainage function |
| PCT/CN2020/137846 WO2022082982A1 (en) | 2020-10-23 | 2020-12-21 | Butt-welding method for u-shaped stainless steel rib with drainage function |
| ZA2022/10859A ZA202210859B (en) | 2020-10-23 | 2022-09-30 | Butt-welding method for u-shaped stainless steel ribs with drainage function |
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| CN202011144786.6A CN112276303B (en) | 2020-10-23 | 2020-10-23 | Stainless steel U-shaped rib butt welding method with water drainage function |
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| CN112276303B true CN112276303B (en) | 2022-06-24 |
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| JP3996825B2 (en) * | 2002-09-17 | 2007-10-24 | 株式会社日立製作所 | Pipe welding method |
| JP2007118032A (en) * | 2005-10-27 | 2007-05-17 | Takada Kiko Kk | Method and structure for reinforcing deck plate |
| CN102601498B (en) * | 2012-03-13 | 2015-04-22 | 中铁宝桥集团有限公司 | Welding method for U-shaped ribs of orthotropic plate of bridge girder |
| CN102861970A (en) * | 2012-09-27 | 2013-01-09 | 中铁山桥集团有限公司 | Welding method of orthotropic plate U-shaped rib fillet welding robot and special equipment thereof |
| CN106112224B (en) * | 2016-07-21 | 2017-12-05 | 武汉天高熔接股份有限公司 | Steel construction U-shaped floor angle welding full penetration technique |
| CN108672900A (en) * | 2018-06-28 | 2018-10-19 | 中铁山桥集团有限公司 | A kind of welding integrated welding method of U-shaped angle of rib weld seam group |
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| CN1583347A (en) * | 2003-08-18 | 2005-02-23 | 中国海洋石油南海西部公司 | Double-phase staniless steel welding process |
| CN108015394A (en) * | 2017-10-30 | 2018-05-11 | 无锡市迪索数控焊接设备有限公司 | A kind of stainless steel tube welding method |
| 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 |
| CN109371835A (en) * | 2018-11-27 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | A kind of cross bridge floor board structure with drain function |
| CN111014898A (en) * | 2019-12-16 | 2020-04-17 | 安徽省工业设备安装有限公司 | Water-soluble paper argon-filling local protection welding method |
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| WO2022082982A1 (en) | 2022-04-28 |
| CN112276303A (en) | 2021-01-29 |
| ZA202210859B (en) | 2022-10-26 |
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