CN106346115A - Method for repairing inside weld seam of U rib plate - Google Patents
Method for repairing inside weld seam of U rib plate Download PDFInfo
- Publication number
- CN106346115A CN106346115A CN201610939607.5A CN201610939607A CN106346115A CN 106346115 A CN106346115 A CN 106346115A CN 201610939607 A CN201610939607 A CN 201610939607A CN 106346115 A CN106346115 A CN 106346115A
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- China
- Prior art keywords
- welding
- floor
- weld
- bevel
- crack
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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
- B23K9/16—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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a method for repairing an inside weld seam of a U rib plate. The method comprises the following steps: determining a specific part of a weld crack when the weld crack is found in detecting the inside weld seam of the U rib plate; performing grinding and repairing welding of the inside weld seam with the weld crack inside the U rib plate to effectively ensure weld seam molding of the inside weld seam after repairing; and performing carbonic arc gas root cleaning, magnetic powder inspection and repairing welding outside the U rib plate to ensure that the weld seam cannot be planed thoroughly and determine that the cracking defect is completely cleaned. Therefore, the repairing molding quality can be ensured, the repaired weld seam can meet the requirement for full-penetrated weld seams, and a welded joint has excellent fatigue performance.
Description
Technical field
The application is related to steel structure bridge manufacturing technology field, the repair method of welding line in more particularly, to a kind of u floor.
Background technology
Orthotropic Steel Bridge Deck, because of its lightweight construction, short construction period, extensively should obtain in the footpath bridge that collapses greatly
With.But from the point of view of the performance of built bridge operation state, the bridge building up in early days occurs in that structural fatigue ftractures successively, resists tired
Labor performance makes people worried, and all come therewith is being significantly increased of bridge inspection and maintenance cost.
The endurance issues of Orthotropic Steel Bridge Deck have seriously restricted its further development and application, or even Partial Bridges
Designer does not stint using the reinforced concrete bridge deck replacement Orthotropic Steel Bridge Deck that construction weight is bigger, construction cost is higher.
Although the design concept of Orthotropic Steel Bridge Deck u floor weld seam and solder technology are in constantly improving, for changing
The fatigue behaviour aspect of the weld seam between kind steel bridge deck and u floor serves certain positive role, but under the conditions of prior art,
U floor weld seam is unilateral angle welding form, when bearing the vehicle-mounted alternate load effect of bridge floor local, its fatigue behaviour performance tool
There is geneogenous deficiency.
For drawbacks described above, certain big companies proposes a kind of solution of brand-new raising Orthotropic Steel Bridge Deck fatigue behaviour
Certainly scheme, welding technology in development and application Orthotropic Steel Bridge Deck u floor；Break through u floor interior space dimension to limit, utilize
Special welding equipment carries out the welding of angle welding inside u floor, and in u floor, welding technology is by the company between u floor and floorings
Welding seam changes into double-side angular weld seam form by unilateral angle welding, be greatly reduced at root of weld and floorings welding toe stress amplitude
Value, thus avoiding the fatigue crack problem of germinating at weld seam root of weld, improves floorings welding toe fatigue behaviour simultaneously；Same with this
When, in u floor, welding technology also will provide broader technology space for orthotropic rectangular plates structure optimization design.
Using high-definition video monitoring and ultrasonic phase array detection technique, to u floor bilateral angle welding, it is effectively examined
Survey, the weld defect including crackle of welding line surface and inside in u floor can be found exactly, and for weld crack
The serious defect of this danger, can directly affect the fatigue behaviour of welding point, need to be reprocessed using reasonable manner, reach
To qualified prescription.
Bead crack is reprocessed, typically will be fully erased for the weld metal containing crackle using carbon arc air gouging method,
And dig the groove making suitable repair welding, afterwards repair welding is carried out using rational welding procedure.Key technology is to lead to
Cross magnetic powder inspection mode and confirm whether crackle is fully erased, and avoid new weld defect to produce in repair welding.
Because u floor inner space is narrow and small, can reliably be welded using special equipment and be processed with weld grinding, and be showed
Technology is had to be difficult to inside u floor carry out effective magnetic powder inspection and carbon arc air gouging, therefore at present cannot be using routine techniquess from u
The internal internally welding line of floor is reprocessed, and is directly reprocessed outside u floor, if needing fully erased weld crack,
Will wear u floor weld seam plane, define the bevel for welding of band gap, and gap size is difficult to control to unanimously, so no matter from
Inner side and outer side is reprocessed, and reprocesses weldquality and is all difficult to be guaranteed.
Therefore, prior art is only capable of carrying out carbon arc air gouging removing to the crack defect of weldering in u floor outside u floor, and
U floor weld seam plane must be worn in reset procedure, guarantee crack defect removes clean, so follow-up repair welding matter again
Amount is difficult to be guaranteed.
Content of the invention
Invention provides in a kind of u floor welding line repair method, to solve current u floor repair welding matter
Amount is difficult to guaranteed technical problem.
For solve above-mentioned technical problem, the invention provides in a kind of u floor welding line repair method, methods described bag
Include:
When detection finds that in described u floor, welding line has weld crack, confirm the concrete position of described weld crack；
Using welding line sharpening machine in u floor, reconditioning is carried out to welding line in described u floor；
In the inner side of described u floor, repair welding is carried out to the weld seam after reconditioning using soldering equipment in u floor；
Carry out carbon arc air gouging back chipping in the outside of described u floor, and form a bevel for welding；
Detect described bevel for welding using magnetic powder inspection, confirm whether described bevel for welding has crack defect；
After confirming that described bevel for welding does not have crack defect, repair welding is carried out to described bevel for welding.
Preferably, before the concrete position of the described weld crack of described confirmation, comprising:
Detect that in described u floor, welding line whether there is using Online Video monitoring technology or ultrasonic phase array detection technique
Weld crack.
Preferably, described utilization Online Video monitoring technology or ultrasonic phase array detection technique detect weldering in described u floor
After weld seam whether there is weld crack, comprising:
If having weld crack, base using the surface that described Online Video monitoring technology detects welding line in described u floor
The welding data record of soldering equipment in described u floor, confirms the concrete position of described weld crack；
Identify the position that there is described weld crack in the outside corresponding position of described u floor.
Preferably, described utilization Online Video monitoring technology or ultrasonic phase array detection technique detect weldering in described u floor
After weld seam whether there is weld crack, comprising:
If there is described welding using the root that described ultrasonic phase array detection technique detects welding line in described u floor
Crackle, then the outside corresponding position in described u floor identify the position that there is described weld crack.
Preferably, after in the described floor using u, welding line sharpening machine carries out reconditioning to welding line in described u floor, bag
Include:
Control the weld shape size after reconditioning it is desirable to the thickness of the angle welding of inner side of described u floor is less than after reconditioning
3mm, and form concave surface.
Preferably, after in the described floor using u, welding line sharpening machine carries out reconditioning to welding line in described u floor, bag
Include:
The fusion length controlling reconditioning is respectively to extend 20mm from the terminal of described weld crack toward two ends.
Preferably, 40 °～60 ° of described bevel for welding angle.
Preferably, after the described outside in described u floor carries out carbon arc air gouging back chipping, comprising:
Grinding process is carried out to described bevel for welding.
Preferably, described repair welding is carried out to described bevel for welding, comprising:
Using drying rifle, described bevel for welding is preheated, preheating temperature is 60 DEG C～80 DEG C；
Using flux-cored wire co2Gas shield welding carries out repair welding to described bevel for welding.
Preferably, described employing flux-cored wire co2After gas shield welding carries out repair welding to described bevel for welding, comprising:
Visual examination and Non-Destructive Testing are carried out to the weld seam of described bevel for welding.
By one or more technical scheme of the present invention, the invention has the advantages that or advantage:
The invention discloses in a kind of u floor welding line repair method, when detection find described u floor in welding line have
During weld crack, confirm the concrete position of described weld crack, then in the inner side of u floor to the interior weldering weldering with weld crack
Seam carries out reconditioning repair welding, can effectively ensure that the appearance of weld of welding line in after reprocessing.Carry out carbon arc gas in the outside of u floor again
Plane back chipping, magnetic powder inspection and repair welding step, guaranteed weld seam can will not dig and wear, and can confirm that crack defect is completely clear
Remove, advantageously ensure that the quality of rewelding, the weld seam of reprocessing of the present invention reaches full penetration weld and requires, the fatigability of welding point
Can be excellent.
Brief description
Fig. 1 is the repair method flow chart of welding line in a kind of u floor in the embodiment of the present invention；
Fig. 2 a-2f is the structural representation of the repair method of welding line in u floor in the embodiment of the present invention.
Specific embodiment
In order that the application the technical staff in the technical field is more clearly understood that the application, below in conjunction with the accompanying drawings,
By specific embodiment, technical scheme is described in detail.
The invention provides in a kind of u floor welding line repair method, first in the inner side of u floor to having weld crack
Interior welding line carry out reconditioning repair welding, can effectively ensure that reprocess after in welding line appearance of weld, after enter in the outside of u floor
Row carbon arc air gouging back chipping, magnetic powder inspection and repair welding, guaranteed weld seam can will not dig and wear, and can confirm that crack defect is complete
Remove, advantageously ensure that the quality of rewelding, the weld seam of reprocessing of the present invention reaches full penetration weld and requires, the fatigue of welding point
Excellent performance.
Because the operation sequence inside current u floor relates only to weldering and interior welding line in mature u floor at present
Grinding technology, need not carry out carbon arc air gouging and magnetic powder inspection, technical mature and reliable inside u floor.
Refer to Fig. 1 below, be the specific implementation process figure of the present invention.
Step 101, when detection finds that in u floor, welding line has weld crack, confirms the concrete portion of described weld crack
Position.
In specific implementation process, available Online Video monitoring technology or ultrasonic phase array detection technique detect u rib
In plate, welding line whether there is weld crack.
If having weld crack using the surface that Online Video monitoring technology detects welding line in u floor, then by looking into
The welding data record asking soldering equipment in u floor can confirm that the concrete position of weld crack, and corresponding position outside u floor
Identify the position that there is weld crack.
If there is weld crack using the root that ultrasonic phase array detection technique detects welding line in u floor, directly
Outside u floor, corresponding position identifies the position that there is weld crack.
Step 102, carries out reconditioning using welding line sharpening machine in u floor to welding line in described u floor.
In specific implementation process, using welding line sharpening machine in u floor in the u floor with described weld crack
Welding line carries out reconditioning, and reconditioning is to close to the root of weld.
Specifically, when reconditioning is carried out to the weld seam that there is weld crack, control system precise control can be passed through simultaneously
Weld shape size after reconditioning it is desirable to after reconditioning the thickness of the angle welding of inner side be less than 3mm, and form concave surface.In addition,
The fusion length that reconditioning need to be controlled respectively extends 20mm from the terminal of weld crack toward two ends.
Step 103, carries out repair welding in the inner side of described u floor to the weld seam after reconditioning using soldering equipment in u floor.
In specific implementation process, using soldering equipment in u floor in the inner side of u floor to the weld seam repair welding one after reconditioning
Road angle welding.
When repair welding is processed, using solid welding wire mixed gas arc welding technique, solid welding wire model er50-6, diameter phi
1.2mm, protective gas is three vigour (ar+co2+o2), the Size of welds of repair welding welding bead is 6～8mm.
Step 104, carries out carbon arc air gouging back chipping in the outside of described u floor, and forms a bevel for welding.
Using welding line root in carbon arc air gouging or the removing of plasma (orifice) gas planing skill, interior welding line plane is not worn, gouge
Depth is more than u floor inner surface about 2～3mm, and forms the bevel for welding of suitable repair welding, bevel angle in outside
40 °～60 °；The length of gouge is respectively to extend 20mm in crackle mark terminal toward two ends.
And after forming bevel for welding, also can carry out grinding process to bevel for welding.
Step 105, detects described bevel for welding using magnetic powder inspection, confirms whether described bevel for welding has crackle and lack
Fall into.
Oxide skin in outside polishing groove, is shown in metallic luster, whether there is weldering using in magnetic powder inspection detection groove
Connecing crack defect, if still having crackle, needing to repeat gouge, polishing, magnetic powder inspection technique, until completing to remove crackle.
Step 106, after confirming that described bevel for welding does not have crack defect, carries out repair welding to described bevel for welding.
Before rewelding, reprocess weld seam (i.e. the weld seam of bevel for welding) and preheated using drying rifle and treating, preheating temperature is 60
DEG C～80 DEG C, using flux-cored wire co2Gas shield welding carries out repair welding, multi-pass welding technique.Correlation is pressed after the completion of rewelding
Standard carries out visual examination of weld and Non-Destructive Testing to the weld seam of bevel for welding.
This poor weld has reached full penetration weld requirement after reprocessing.In specific u floor, weldering crackle repair method is shown in
Fig. 2 a-2f.
In specific implementation process:
Referring to Fig. 2 a, u floor 2 is welded with floorings 1, u floor 2 has outside 3 and inner side 4.And in u floor 2
At the interior welding line of inner side 4, there is a weld crack 5.
Referring to Fig. 2 b, carry out welding seam grinding process in the inner side 4 of u floor 2.
Referring to Fig. 2 c, carry out repair welding process in the inner side 4 of u floor 2.
Referring to Fig. 2 d, carry out carbon arc air gouging process in the outside 3 of u floor 2.
Referring to Fig. 2 e, carry out magnetic powder inspection process in the outside 3 of u floor 2.
Referring to Fig. 2 f, carry out repair welding in the outside 3 of u floor 2.
By one or more embodiment of the present invention, the invention has the advantages that or advantage:
The invention provides in a kind of u floor welding line repair method, when detection find described u floor in welding line have
During weld crack, confirm the concrete position of described weld crack, then in the inner side of u floor to the interior weldering weldering with weld crack
Seam carries out reconditioning repair welding, can effectively ensure that the appearance of weld of welding line in after reprocessing.Carry out carbon arc gas in the outside of u floor again
Plane back chipping, magnetic powder inspection and repair welding step, guaranteed weld seam can will not dig and wear, and can confirm that crack defect is completely clear
Remove, advantageously ensure that the quality of rewelding, the weld seam of reprocessing of the present invention reaches full penetration weld and requires, the fatigability of welding point
Can be excellent.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to wrap
Include preferred embodiment and fall into being had altered and changing of the application scope.
Obviously, those skilled in the art can carry out the various changes and modification essence without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprise these changes and modification.
Claims (10)
1. in a kind of u floor the repair method of welding line it is characterised in that methods described includes:
When detection finds that in described u floor, welding line has weld crack, confirm the concrete position of described weld crack；
Using welding line sharpening machine in u floor, reconditioning is carried out to welding line in described u floor；
In the inner side of described u floor, repair welding is carried out to the weld seam after reconditioning using soldering equipment in u floor；
Carry out carbon arc air gouging back chipping in the outside of described u floor, and form a bevel for welding；
Detect described bevel for welding using magnetic powder inspection, confirm whether described bevel for welding has crack defect；
After confirming that described bevel for welding does not have crack defect, repair welding is carried out to described bevel for welding.
2. the method for claim 1 is it is characterised in that before the concrete position of the described weld crack of described confirmation, wrap
Include:
Detect that in described u floor, welding line whether there is welding using Online Video monitoring technology or ultrasonic phase array detection technique
Crackle.
3. method as claimed in claim 2 is it is characterised in that described utilization Online Video monitoring technology or ultrasonic phase array are examined
After survey technology detects that in described u floor, welding line whether there is weld crack, comprising:
If having weld crack using the surface that described Online Video monitoring technology detects welding line in described u floor, based on institute
State the welding data record of soldering equipment in u floor, confirm the concrete position of described weld crack；
Identify the position that there is described weld crack in the outside corresponding position of described u floor.
4. method as claimed in claim 2 is it is characterised in that described utilization Online Video monitoring technology or ultrasonic phase array are examined
After survey technology detects that in described u floor, welding line whether there is weld crack, comprising:
If there is described welding using the root that described ultrasonic phase array detection technique detects welding line in described u floor to split
Stricture of vagina, then the outside corresponding position in described u floor identify the position that there is described weld crack.
5. the method for claim 1 is it is characterised in that welding line sharpening machine is to described u floor in described utilization u floor
After interior welding line carries out reconditioning, comprising:
Control the weld shape size after reconditioning it is desirable to the thickness of the angle welding of inner side of described u floor is less than 3mm after reconditioning,
And form concave surface.
6. method as claimed in claim 5 is it is characterised in that welding line sharpening machine is to described u floor in described utilization u floor
After interior welding line carries out reconditioning, comprising:
The fusion length controlling reconditioning is respectively to extend 20mm from the terminal of described weld crack toward two ends.
7. the method for claim 1 is it is characterised in that 40 °～60 ° of described bevel for welding angle.
8. the method as described in claim 1 or 7 is it is characterised in that to carry out carbon arc air gouging clear in the described outside in described u floor
After root, comprising:
Grinding process is carried out to described bevel for welding.
9. the method for claim 1 is it is characterised in that described carry out repair welding to described bevel for welding, comprising:
Using drying rifle, described bevel for welding is preheated, preheating temperature is 60 DEG C～80 DEG C；
Using flux-cored wire co2Gas shield welding carries out repair welding to described bevel for welding.
10. method as claimed in claim 9 is it is characterised in that described employing flux-cored wire co2Gas shield welding is to described welding slope
After mouth carries out repair welding, comprising:
Visual examination and Non-Destructive Testing are carried out to the weld seam of described bevel for welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939607.5A CN106346115A (en) | 2016-11-01 | 2016-11-01 | Method for repairing inside weld seam of U rib plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610939607.5A CN106346115A (en) | 2016-11-01 | 2016-11-01 | Method for repairing inside weld seam of U rib plate |
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| Publication Number | Publication Date |
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| CN106346115A true CN106346115A (en) | 2017-01-25 |
Family
ID=57864079
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|---|---|---|---|
| CN201610939607.5A Pending CN106346115A (en) | 2016-11-01 | 2016-11-01 | Method for repairing inside weld seam of U rib plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745204A (en) * | 2017-06-14 | 2018-03-02 | 中交第二航务工程局有限公司 | A kind of U ribs weld joint on inner side repair method |
| CN112548382A (en) * | 2020-03-31 | 2021-03-26 | 中车青岛四方机车车辆股份有限公司 | Defect welding repair process for arc surface welding seam |
| CN113681232A (en) * | 2021-08-23 | 2021-11-23 | 青岛中车四方轨道车辆有限公司 | Method for maintaining weld cracks of bogie in service period |
| CN114184672A (en) * | 2021-11-11 | 2022-03-15 | 无锡金诚工程技术服务有限公司 | Ultrasonic phased array detection method for improving measurement accuracy of U-rib angle weld |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107745204A (en) * | 2017-06-14 | 2018-03-02 | 中交第二航务工程局有限公司 | A kind of U ribs weld joint on inner side repair method |
| CN112548382A (en) * | 2020-03-31 | 2021-03-26 | 中车青岛四方机车车辆股份有限公司 | Defect welding repair process for arc surface welding seam |
| CN113681232A (en) * | 2021-08-23 | 2021-11-23 | 青岛中车四方轨道车辆有限公司 | Method for maintaining weld cracks of bogie in service period |
| CN114184672A (en) * | 2021-11-11 | 2022-03-15 | 无锡金诚工程技术服务有限公司 | Ultrasonic phased array detection method for improving measurement accuracy of U-rib angle weld |
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