CN106270930A - Two-side synchronous welding method inside and outside a kind of U rib - Google Patents
Two-side synchronous welding method inside and outside a kind of U rib Download PDFInfo
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- CN106270930A CN106270930A CN201610913305.0A CN201610913305A CN106270930A CN 106270930 A CN106270930 A CN 106270930A CN 201610913305 A CN201610913305 A CN 201610913305A CN 106270930 A CN106270930 A CN 106270930A
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- Prior art keywords
- rib
- welding
- outside
- side synchronous
- welded
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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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K2101/28—Beams
Abstract
The present invention relates to two-side synchronous welding method inside and outside a kind of U rib, comprise the following steps: the upper surface of device to be welded is cleaned out；U rib is placed on the upper surface of device to be welded；Assembling groove is formed between bottom and the upper surface of device to be welded of U rib；U rib is carried out positioning welding；The inner side and outer side of U rib is carried out two-side synchronous welding；The weld seam of U rib is carried out Non-Destructive Testing.Inside and outside this U rib, two-side synchronous welding method can reduce weld interval and improve productivity ratio, it is ensured that whole weldquality, improves the anti-fatigue performance of floorings, improves the reliable of welding procedure and stability.
Description
Technical field
The present invention relates to steel structure bridge manufacturing technology field, particularly to two-side synchronous welding method inside and outside a kind of U rib.
Background technology
The fatigue crack problem of bridge floor orthotropic Slab element, Orthotropic Steel Bridge Deck U rib and floorings connecting welding
Root crack and the toe crack of joint germinating are the most concerned, and Kyushu University poplar Mu Ye etc. is to U rib and floorings root of weld
Place's fatigue problem is studied, and finds that, for different fusion penetration U angle of rib weld seams, major part test specimen only occurs root of weld to ftracture, bridge floor
The situation that plate toe of weld and root of weld ftracture simultaneously also has generation, and when at same welding point, root of weld toe of weld all ftractures, it influences each other
Can not ignore.Being confined to prior art, U rib can only be soldered to floorings from outside, this angle welding web to rib
In eccentric state, the bending stress that wheel weight acts on the U angle of rib root of weld by floorings is excessive, in addition remaining at root of weld
The existence of tension improves the maximum effectively tensile stress value in lack of penetration root of weld tip, and be therefore easily generated from root of weld germinating is tired
Labor crackle.Crack initiation at root of weld is until before through, it is impossible to by direct visual detection, the detection maintenance work ten of root crack
Divide difficulty, and, such root crack once germinates, it is likely that form through check to floorings development, may time serious
Cause deck paving partial collapse, endanger floorings traffic safety, additionally, such fatigue crack is also possible to cause application to peel off,
The secondary diseases such as corrosion.
The welding tractor that inside U rib, welding equipment uses enters inside U rib, is not take up spatial locations external, and whole work
Process flow either interior postwelding outside weld, or the first interior weldering of outer postwelding, wherein U rib still uses tack welding with the assembling of floorings
Clicking on luggage clamping fixed, every piece of Slab element assembly process needs time-consuming more than 1 hour, simultaneously tack weld because the frequent starting the arc,
Easily there is weld defect in blow-out point, simultaneously in long-term manufacture, because tack weld causes the backing weld seam of outer side weld not
Continuously and affect the presentation quality of outside cap weld.
, there is weldering in postwelding outside weld in U rib welding process is first in prior art, or the one side weld technique of the first interior weldering of outer postwelding
Seam easily burns, fusion penetration is unstable and affect the anti-fatigue performance of floorings, easily occurs weld defect, welding job at tack welding
Inefficient problem.
Summary of the invention
The invention provides two-side synchronous welding method inside and outside a kind of U rib, solve or part solves in prior art
One side weld technique exists that weld seam easily burns, fusion penetration is unstable and affects the anti-fatigue performance of floorings, easily occurs at tack welding
Weld defect, the technical problem that welding job is inefficient, it is achieved that two-side synchronous welding inside and outside U rib, reduces weld interval and carries
High production rate, it is ensured that whole weldquality, improves the anti-fatigue performance of floorings, improves the reliable and stability of welding procedure
Technique effect.
Two-side synchronous welding method inside and outside a kind of U rib that the present invention provides, comprises the following steps:
The upper surface of device to be welded is cleaned out；
Described U rib is placed on the upper surface of described device to be welded；The bottom of described U rib and described device to be welded
Assembling groove is formed between upper surface；
Described U rib is carried out positioning welding；
The inner side and outer side of described U rib is carried out two-side synchronous welding；
The weld seam of described U rib is carried out Non-Destructive Testing.
As preferably, the described upper surface by device to be welded is cleaned out, including:
By to-be-welded region and the both sides 20～30mm model of described to-be-welded region of the upper surface of described device to be welded
Enclose interior rust, greasy dirt, paint and oxide skin polishing to clean out, make described to-be-welded region expose metallic luster.
As preferably, the root face of described assembling groove is 1.4～1.6mm；The angle of described assembling groove is 52 °～58 °；
After described U rib is placed on the upper surface of described device to be welded, the assembly clearance of described U rib is 0～0.75mm.
As preferably, the root face of described assembling groove is 1.5mm；The angle of described assembling groove is 55 °.
As preferably, described described U rib is carried out positioning welding, including:
Positioning welding is carried out in the prosposition position of described U rib by solid welding wire；
Described positioning welding uses CO2Gas shielded arc welding；
The weld spacing of described positioning welding is 300～400mm, and fusion length is 40～50mm, throat depth be 3～
4mm。
As preferably, the described inner side and outer side to described U rib carries out two-side synchronous welding, including:
Use the protection weldering of solid welding wire three-element mixed gas body that the inner side and outer side of described U rib is carried out primary bilateral same
Step welding, forms the first weld seam of groove；
Use metal-powder-core carbon dioxide gas arc welding that the inner side and outer side of described U rib carries out secondary bilateral same
Step welding, forms the second weld seam of described groove.
As preferably, the speed of described two-side synchronous welding is 300～350mm；
The welding gun of the described first weld seam in the outside of described U rib with the spacing of the welding gun of described second weld seam is
300mm。
As preferably, the solid welding wire of described solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire, guarantor
The percent by volume of each component protecting gas is: Ar is 84%, CO2It is 14%, O2It is 2%.
As preferably, the trade mark of the solid welding wire of described solid welding wire three-element mixed gas body protection weldering is GWL-W56, diameter
For 1.2mm；
The model of the metal-powder-core of described metal-powder-core carbon dioxide gas arc welding is E500T-1, a diameter of 1.4mm.
As preferably, by ultrasonic phase array Non-Destructive Testing, the internal flaw of the weld seam of described U rib is detected.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed, to-be-welded region and both sides are cleared up, assembling groove is rationally set, to U rib inner side and outer side
Carry out two-side synchronous welding, make the attachment weld between U rib and floorings be changed into double-side angular weld seam form by unilateral angle welding,
It is greatly reduced at root of weld and the tensile stress value of floorings welding toe, thus avoids the fatigue crack of germinating at weld seam root of weld, it is ensured that
Whole weldquality, improves floorings welding toe fatigue behaviour；Meanwhile, outside two-side synchronous welding is avoided that tack weld causes
Side backing weld seam discontinuously and affect outside cap weld presentation quality, improve welding job efficiency.So, efficiently solve
In prior art, one side weld technique exists that weld seam easily burns, fusion penetration is unstable and affects the anti-fatigue performance of floorings, tack welding
Easily there is weld defect in place, the technical problem that welding job is inefficient, it is achieved that two-side synchronous welding inside and outside U rib, reduces
Weld interval improves productivity ratio, it is ensured that whole weldquality, improves the anti-fatigue performance of floorings, improves the reliable of welding procedure
And the technique effect of stability.
Accompanying drawing explanation
The flow chart of two-side synchronous welding method inside and outside the U rib that Fig. 1 provides for the present invention；
The structural representation of the two-side synchronous welder that Fig. 2 provides for the present invention.
(parts that in figure, each label represents are followed successively by: 1 gate-type walking mechanism, 2 automatic wire feeding mechanisms, 3 hydraulic pressure automatic centerings
Mechanism, 4 equidistant synchronous welding systems, 5 interior weldering automatic vehicles, 6 welding operation platforms, 7 energy and control system)
Detailed description of the invention
The embodiment of the present application provides two-side synchronous welding method inside and outside a kind of U rib, solves or part solves existing
In technology, one side weld technique exists that weld seam easily burns, fusion penetration is unstable and affects the anti-fatigue performance of floorings, holds at tack welding
Weld defect easily occur, the technical problem that welding job is inefficient, by clearing up to-be-welded region and both sides, rationally
Assembling groove is set, U rib inner side and outer side is carried out two-side synchronous welding, it is achieved that two-side synchronous welding inside and outside U rib, reduce weldering
The time that connects improves productivity ratio, it is ensured that whole weldquality, improves the anti-fatigue performance of floorings, improve the reliable of welding procedure and
The technique effect of stability.
See accompanying drawing 1, two-side synchronous welding method inside and outside a kind of U rib that the present invention provides, comprise the following steps:
S1: the upper surface of device to be welded is cleaned out；Particularly as follows: by the district to be welded of the upper surface of device to be welded
Rust, greasy dirt, paint and oxide skin polishing in the range of the both sides 20～30mm of territory and to-be-welded region are cleaned out, and make to be welded
Connect region and both sides and expose metallic luster, to avoid above-mentioned impurity effect weldquality.
S2: U rib is placed on the upper surface of device to be welded；Shape between bottom and the upper surface of device to be welded of U rib
Become assembling groove；The root face of assembling groove is 1.4～1.6mm；The angle of assembling groove is 52 °～58 °；U rib is placed on to be welded
Behind the upper surface of connection device, the assembly clearance of U rib is 0～0.75mm.As a kind of preferred embodiment, the root face of assembling groove
For 1.5mm；The angle of assembling groove is 55 °.
S3: U rib is carried out positioning welding；Particularly as follows: carry out positioning welding by solid welding wire in the prosposition position of U rib；
Positioning welding uses CO2Gas shielded arc welding；The weld spacing of positioning welding is 300～400mm, and fusion length is 40～50mm,
Throat depth is 3～4mm.
S4: the inner side and outer side of U rib is carried out two-side synchronous welding；Wherein, solid welding wire three-element mixed gas body is used to protect
Protect weldering and the inner side and outer side of U rib is carried out primary two-side synchronous welding, form the first weld seam of groove；Use metal powder
Core carbon dioxide gas arc welding carries out secondary two-side synchronous welding to the inner side and outer side of U rib, forms the second of groove
Road weld seam.Solid welding wire three-element mixed gas body protection weldering solid welding wire be surface without copper plating soldering wire, solid core welding wire is without slag, no
Affect the weld appearance quality of subsequent weld.The percent by volume of each component of protective gas is: Ar is 84%, CO2It is 14%,
O2It is 2%.The trade mark of the solid welding wire of solid welding wire three-element mixed gas body protection weldering is GWL-W56, a diameter of 1.2mm；Metal
The model of the metal-powder-core of powder core carbon dioxide gas arc welding is E500T-1, a diameter of 1.4mm.
S5: the weld seam of U rib is carried out Non-Destructive Testing, particularly as follows: by ultrasonic phase array Non-Destructive Testing in U rib weld seam
Portion's defect detects, if being unsatisfactory for the quality acceptance standard set, then carries out reprocessing welding.
Wherein, by to-be-welded region and both sides are cleared up, assembling groove is rationally set, to U rib inner side and outer side
Carry out two-side synchronous welding, make the attachment weld between U rib and floorings be changed into double-side angular weld seam form by unilateral angle welding,
It is greatly reduced at root of weld and the tensile stress value of floorings welding toe, thus avoids the fatigue crack of germinating at weld seam root of weld, it is ensured that
Whole weldquality, improves floorings welding toe fatigue behaviour；Meanwhile, outside two-side synchronous welding is avoided that tack weld causes
Side backing weld seam discontinuously and affect outside cap weld presentation quality, improve welding job efficiency.By selecting suitably
Type of Welding, the equidistant welding in outside in selecting, it is ensured that the low spatter rate of welding inside U rib, it is simple to weld appearance quality and
Time monitoring, improve the reliable of welding procedure and stability.Having quality acceptance standard targetedly by setting, it is unnecessary to reduce
Reprocess, improve weld seam qualification rate successively.
Further, welding current and voltage inside U rib determine according to welding procedure qualification test, and two-side synchronous welds
Speed be 300～350mm；The welding gun of the first weld seam in the outside of U rib with the spacing of the welding gun of second weld seam is
300mm。
Further, inside and outside this U rib, two-side synchronous welding method is realized by corresponding two-side synchronous welder, sees
Accompanying drawing 2, two-side synchronous welder includes: gate-type walking mechanism 1, welding operation platform 6, hydraulic pressure automatic centering mechanism 3, interior weldering
Automatic vehicle 5, equidistant synchronous welding system 4, automatic wire feeding mechanism 2, the energy and control system 7；Device to be welded is fixed on weldering
Connecing on operating platform 6, welding operation platform 6 both sides arrange slide rail, and the support column at gate-type walking mechanism 1 two ends slides setting respectively
On two slide rails.Hydraulic pressure automatic centering mechanism 3, equidistant synchronous welding system 4, automatic wire feeding mechanism 2 hang and are located at gate-type walking
In mechanism 1.Meanwhile, this two-side synchronous welder is just additionally provided with air supply plant and cooling system, and air supply plant is used for welding
Time provide protective gas.Cooling system cools for interior weldering automatic vehicle 5 and equidistant synchronous welding system 4.Welding is made
During industry, interior weldering automatic vehicle 5 is arranged on inside U rib, for the welding of U rib two ends weld joint on inner side；Equidistant synchronous welding system 4 sets
Put outside U rib, the welding of side weld outside U rib two ends；Automatic wire feeding mechanism 2 at interior weldering automatic vehicle 5 and equidistantly synchronizes
The slipping of welding system 4 constantly carries welding wire；Hydraulic pressure automatic centering mechanism 3 control interior weldering automatic vehicle 5 and equidistantly with
Step welding system 4 remains the centrage sliding along U rib, drives gate-type walking mechanism 1 sliding by the energy and control system 7
On slide rail, and then weldering automatic vehicle 5 and equidistant synchronous welding system 4 synchronization job in driving, complete the same of bilateral inside and outside U rib
Step weld job.
With embodiment, technical scheme is described in detail below in conjunction with the accompanying drawings.
Embodiment one
As a example by 3 U rib floorings, the two-side synchronous welder that inside and outside U rib, two-side synchronous welding method is corresponding includes:
5,3 equidistant synchronizations of automatic vehicle are welded in gate-type walking mechanism 1, welding operation platform 6,3 set hydraulic pressure automatic centering mechanism 3,3
Welding system 4,3 set automatic wire feeding mechanism 2, the energy and control system 7；Weld automatic vehicle 5 in 3 and lay respectively at the interior of 3 U ribs
Portion.3 set hydraulic pressure automatic centering mechanism 3,3 equidistant synchronous welding system 4 and 3 set automatic wire feeding mechanisms 2 are arranged on gate-type walking
In mechanism 1,3 the most corresponding 3 U ribs of equidistant synchronous welding system 4 are arranged.Inside and outside this U rib, two-side synchronous welding method includes
Following steps:
S1: by the rust in the range of the to-be-welded region of the upper surface of floorings and the both sides 22mm of to-be-welded region, oil
Dirt, paint and oxide skin polishing are cleaned out, and make to-be-welded region and both sides expose metallic luster.
S2: 3 U ribs are placed on the upper surface of floorings；Assembling is formed between bottom and the upper surface of floorings of U rib
Groove；The root face of assembling groove is 1.4mm；The angle of assembling groove is 53 °；After U rib is placed on the upper surface of floorings, U rib
Assembly clearance be 0.15mm.
S3: carry out positioning welding in the prosposition position of U rib by solid welding wire；Positioning welding uses CO2Gas shielded arc welding；
The weld spacing of positioning welding is 320mm, and fusion length is 42mm, and throat depth is 3.2mm.
S4: the inner side and outer side of U rib is carried out two-side synchronous welding；Wherein, solid welding wire three-element mixed gas body is used to protect
Protect weldering and the inner side and outer side of U rib is carried out primary two-side synchronous welding, form the first weld seam of groove；Use metal powder
Core carbon dioxide gas arc welding carries out secondary two-side synchronous welding to the inner side and outer side of U rib, forms the second of groove
Road weld seam.The solid welding wire of solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire.Each component of protective gas
Percent by volume be: Ar is 84%, CO2It is 14%, O2It is 2%.The solid welding wire of solid welding wire three-element mixed gas body protection weldering
The trade mark be GWL-W56, a diameter of 1.2mm；The model of the metal-powder-core of metal-powder-core carbon dioxide gas arc welding is
E500T-1, a diameter of 1.4mm.
S5: detected the internal flaw of U rib weld seam by ultrasonic phase array Non-Destructive Testing, if being unsatisfactory for the matter set
Amount acceptance criteria, then carry out reprocessing welding.
Embodiment two
As a example by 3 U rib floorings, the two-side synchronous welder that inside and outside U rib, two-side synchronous welding method is corresponding includes:
5,3 equidistant synchronizations of automatic vehicle are welded in gate-type walking mechanism 1, welding operation platform 6,3 set hydraulic pressure automatic centering mechanism 3,3
Welding system 4,3 set automatic wire feeding mechanism 2, the energy and control system 7；Weld automatic vehicle 5 in 3 and lay respectively at the interior of 3 U ribs
Portion.3 set hydraulic pressure automatic centering mechanism 3,3 equidistant synchronous welding system 4 and 3 set automatic wire feeding mechanisms 2 are arranged on gate-type walking
In mechanism 1,3 the most corresponding 3 U ribs of equidistant synchronous welding system 4 are arranged.Inside and outside this U rib, two-side synchronous welding method includes
Following steps:
S1: by the rust in the range of the to-be-welded region of the upper surface of floorings and the both sides 24mm of to-be-welded region, oil
Dirt, paint and oxide skin polishing are cleaned out, and make to-be-welded region and both sides expose metallic luster.
S2: 3 U ribs are placed on the upper surface of floorings；Assembling is formed between bottom and the upper surface of floorings of U rib
Groove；The root face of assembling groove is 1.5mm；The angle of assembling groove is 54 °；After U rib is placed on the upper surface of floorings, U rib
Assembly clearance be 0.30mm.
S3: carry out positioning welding in the prosposition position of U rib by solid welding wire；Positioning welding uses CO2Gas shielded arc welding；
The weld spacing of positioning welding is 340mm, and fusion length is 44mm, and throat depth is 3.4mm.
S4: the inner side and outer side of U rib is carried out two-side synchronous welding；Wherein, solid welding wire three-element mixed gas body is used to protect
Protect weldering and the inner side and outer side of U rib is carried out primary two-side synchronous welding, form the first weld seam of groove；Use metal powder
Core carbon dioxide gas arc welding carries out secondary two-side synchronous welding to the inner side and outer side of U rib, forms the second of groove
Road weld seam.The solid welding wire of solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire.Each component of protective gas
Percent by volume be: Ar is 84%, CO2It is 14%, O2It is 2%.The solid welding wire of solid welding wire three-element mixed gas body protection weldering
The trade mark be GWL-W56, a diameter of 1.2mm；The model of the metal-powder-core of metal-powder-core carbon dioxide gas arc welding is
E500T-1, a diameter of 1.4mm.
S5: detected the internal flaw of U rib weld seam by ultrasonic phase array Non-Destructive Testing, if being unsatisfactory for the matter set
Amount acceptance criteria, then carry out reprocessing welding.
Embodiment three
As a example by 3 U rib floorings, the two-side synchronous welder that inside and outside U rib, two-side synchronous welding method is corresponding includes:
5,3 equidistant synchronizations of automatic vehicle are welded in gate-type walking mechanism 1, welding operation platform 6,3 set hydraulic pressure automatic centering mechanism 3,3
Welding system 4,3 set automatic wire feeding mechanism 2, the energy and control system 7；Weld automatic vehicle 5 in 3 and lay respectively at the interior of 3 U ribs
Portion.3 set hydraulic pressure automatic centering mechanism 3,3 equidistant synchronous welding system 4 and 3 set automatic wire feeding mechanisms 2 are arranged on gate-type walking
In mechanism 1,3 the most corresponding 3 U ribs of equidistant synchronous welding system 4 are arranged.Inside and outside this U rib, two-side synchronous welding method includes
Following steps:
S1: by the rust in the range of the to-be-welded region of the upper surface of floorings and the both sides 26mm of to-be-welded region, oil
Dirt, paint and oxide skin polishing are cleaned out, and make to-be-welded region and both sides expose metallic luster.
S2: 3 U ribs are placed on the upper surface of floorings；Assembling is formed between bottom and the upper surface of floorings of U rib
Groove；The root face of assembling groove is 1.5mm；The angle of assembling groove is 55 °；After U rib is placed on the upper surface of floorings, U rib
Assembly clearance be 0.45mm.
S3: carry out positioning welding in the prosposition position of U rib by solid welding wire；Positioning welding uses CO2Gas shielded arc welding；
The weld spacing of positioning welding is 360mm, and fusion length is 46mm, and throat depth is 3.5mm.
S4: the inner side and outer side of U rib is carried out two-side synchronous welding；Wherein, solid welding wire three-element mixed gas body is used to protect
Protect weldering and the inner side and outer side of U rib is carried out primary two-side synchronous welding, form the first weld seam of groove；Use metal powder
Core carbon dioxide gas arc welding carries out secondary two-side synchronous welding to the inner side and outer side of U rib, forms the second of groove
Road weld seam.The solid welding wire of solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire.Each component of protective gas
Percent by volume be: Ar is 84%, CO2It is 14%, O2It is 2%.The solid welding wire of solid welding wire three-element mixed gas body protection weldering
The trade mark be GWL-W56, a diameter of 1.2mm；The model of the metal-powder-core of metal-powder-core carbon dioxide gas arc welding is
E500T-1, a diameter of 1.4mm.
S5: detected the internal flaw of U rib weld seam by ultrasonic phase array Non-Destructive Testing, if being unsatisfactory for the matter set
Amount acceptance criteria, then carry out reprocessing welding.
Embodiment four
As a example by 3 U rib floorings, the two-side synchronous welder that inside and outside U rib, two-side synchronous welding method is corresponding includes:
5,3 equidistant synchronizations of automatic vehicle are welded in gate-type walking mechanism 1, welding operation platform 6,3 set hydraulic pressure automatic centering mechanism 3,3
Welding system 4,3 set automatic wire feeding mechanism 2, the energy and control system 7；Weld automatic vehicle 5 in 3 and lay respectively at the interior of 3 U ribs
Portion.3 set hydraulic pressure automatic centering mechanism 3,3 equidistant synchronous welding system 4 and 3 set automatic wire feeding mechanisms 2 are arranged on gate-type walking
In mechanism 1,3 the most corresponding 3 U ribs of equidistant synchronous welding system 4 are arranged.Inside and outside this U rib, two-side synchronous welding method includes
Following steps:
S1: by the rust in the range of the to-be-welded region of the upper surface of floorings and the both sides 28mm of to-be-welded region, oil
Dirt, paint and oxide skin polishing are cleaned out, and make to-be-welded region and both sides expose metallic luster.
S2: 3 U ribs are placed on the upper surface of floorings；Assembling is formed between bottom and the upper surface of floorings of U rib
Groove；The root face of assembling groove is 1.5mm；The angle of assembling groove is 56 °；After U rib is placed on the upper surface of floorings, U rib
Assembly clearance be 0.55mm.
S3: carry out positioning welding in the prosposition position of U rib by solid welding wire；Positioning welding uses CO2Gas shielded arc welding；
The weld spacing of positioning welding is 380mm, and fusion length is 48mm, and throat depth is 3.8mm.
S4: the inner side and outer side of U rib is carried out two-side synchronous welding；Wherein, solid welding wire three-element mixed gas body is used to protect
Protect weldering and the inner side and outer side of U rib is carried out primary two-side synchronous welding, form the first weld seam of groove；Use metal powder
Core carbon dioxide gas arc welding carries out secondary two-side synchronous welding to the inner side and outer side of U rib, forms the second of groove
Road weld seam.The solid welding wire of solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire.Each component of protective gas
Percent by volume be: Ar is 84%, CO2It is 14%, O2It is 2%.The solid welding wire of solid welding wire three-element mixed gas body protection weldering
The trade mark be GWL-W56, a diameter of 1.2mm；The model of the metal-powder-core of metal-powder-core carbon dioxide gas arc welding is
E500T-1, a diameter of 1.4mm.
S5: detected the internal flaw of U rib weld seam by ultrasonic phase array Non-Destructive Testing, if being unsatisfactory for the matter set
Amount acceptance criteria, then carry out reprocessing welding.
One or more technical schemes provided herein, at least have the following technical effect that or advantage:
Owing to have employed, to-be-welded region and both sides are cleared up, assembling groove is rationally set, to U rib inner side and outer side
Carrying out two-side synchronous welding, the attachment weld between U rib and floorings is changed into double-side angular weld seam form, greatly by unilateral angle welding
Width reduces at root of weld and the tensile stress value of floorings welding toe, thus avoids the fatigue crack of germinating at weld seam root of weld, it is ensured that whole
Individual weldquality, improves floorings welding toe fatigue behaviour；Meanwhile, two-side synchronous welding is avoided that the outside that tack weld causes
Backing weld seam discontinuously and affect outside cap weld presentation quality, improve welding job efficiency.So, efficiently solve now
Easily burn with the presence of one side weld technique weld seam in technology, fusion penetration is unstable and affects the anti-fatigue performance of floorings, at tack welding
Weld defect easily there is, the technical problem that welding job is inefficient, it is achieved that two-side synchronous welding inside and outside U rib, reduce weldering
The time that connects improves productivity ratio, it is ensured that whole weldquality, improves the anti-fatigue performance of floorings, improve the reliable of welding procedure and
The technique effect of stability.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not limited to this
Bright, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included in the present invention
Protection domain within.
Claims (10)
1. two-side synchronous welding method inside and outside a U rib, it is characterised in that comprise the following steps:
The upper surface of device to be welded is cleaned out；
Described U rib is placed on the upper surface of described device to be welded；The bottom of described U rib and the upper end of described device to be welded
Assembling groove is formed between face；
Described U rib is carried out positioning welding；
The inner side and outer side of described U rib is carried out two-side synchronous welding；
The weld seam of described U rib is carried out Non-Destructive Testing.
2. two-side synchronous welding method inside and outside U rib as claimed in claim 1, it is characterised in that described by device to be welded
Upper surface is cleaned out, including:
In the range of the to-be-welded region of the upper surface of described device to be welded and the both sides 20～30mm of described to-be-welded region
Rust, greasy dirt, paint and oxide skin polishing clean out, make described to-be-welded region expose metallic luster.
3. two-side synchronous welding method inside and outside U rib as claimed in claim 1, it is characterised in that
The root face of described assembling groove is 1.4～1.6mm；The angle of described assembling groove is 52 °～58 °；
After described U rib is placed on the upper surface of described device to be welded, the assembly clearance of described U rib is 0～0.75mm.
4. two-side synchronous welding method inside and outside U rib as claimed in claim 3, it is characterised in that
The root face of described assembling groove is 1.5mm；The angle of described assembling groove is 55 °.
5. two-side synchronous welding method inside and outside U rib as claimed in claim 1, it is characterised in that described carry out described U rib is determined
Position welding, including:
Positioning welding is carried out in the prosposition position of described U rib by solid welding wire；
Described positioning welding uses CO2Gas shielded arc welding；
The weld spacing of described positioning welding is 300～400mm, and fusion length is 40～50mm, and throat depth is 3～4mm.
6. two-side synchronous welding method inside and outside U rib as claimed in claim 1, it is characterised in that the described inner side to described U rib
Two-side synchronous welding is carried out with outside, including:
Use the protection weldering of solid welding wire three-element mixed gas body that the inner side and outer side of described U rib is carried out primary two-side synchronous weldering
Connect, form the first weld seam of groove；
Use metal-powder-core carbon dioxide gas arc welding that the inner side and outer side of described U rib is carried out secondary two-side synchronous weldering
Connect, form the second weld seam of described groove.
7. two-side synchronous welding method inside and outside U rib as claimed in claim 6, it is characterised in that
The speed of described two-side synchronous welding is 300～350mm；
The welding gun of the described first weld seam in the outside of described U rib is 300mm with the spacing of the welding gun of described second weld seam.
8. two-side synchronous welding method inside and outside U rib as claimed in claim 6, it is characterised in that
The solid welding wire of described solid welding wire three-element mixed gas body protection weldering is that surface is without copper plating soldering wire, each component of protective gas
Percent by volume be: Ar is 84%, CO2It is 14%, O2It is 2%.
9. two-side synchronous welding method inside and outside U rib as claimed in claim 8, it is characterised in that
The trade mark of the solid welding wire of described solid welding wire three-element mixed gas body protection weldering is GWL-W56, a diameter of 1.2mm；
The model of the metal-powder-core of described metal-powder-core carbon dioxide gas arc welding is E500T-1, a diameter of 1.4mm.
10. two-side synchronous welding method inside and outside U rib as claimed in claim 1, it is characterised in that
By ultrasonic phase array Non-Destructive Testing, the internal flaw of the weld seam of described U rib is detected.
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| CN201610913305.0A CN106270930A (en) | 2016-10-19 | 2016-10-19 | Two-side synchronous welding method inside and outside a kind of U rib |
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| CN201610913305.0A CN106270930A (en) | 2016-10-19 | 2016-10-19 | Two-side synchronous welding method inside and outside a kind of U rib |
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| CN107175449A (en) * | 2017-05-27 | 2017-09-19 | 武船重型工程股份有限公司 | A kind of U ribs internal welding machine adjustable guide rail and governor motion |
| 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 |
| CN108071076A (en) * | 2017-11-27 | 2018-05-25 | 武船重型工程股份有限公司 | A kind of welding technique of truss-type bridges floorings |
| CN108161186A (en) * | 2017-12-26 | 2018-06-15 | 武船重型工程股份有限公司 | A kind of upset welding method of U ribs |
| 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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