CN102601498B - Welding method for U-shaped ribs of orthotropic plate of bridge girder - Google Patents
Welding method for U-shaped ribs of orthotropic plate of bridge girder Download PDFInfo
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- CN102601498B CN102601498B CN201210064113.9A CN201210064113A CN102601498B CN 102601498 B CN102601498 B CN 102601498B CN 201210064113 A CN201210064113 A CN 201210064113A CN 102601498 B CN102601498 B CN 102601498B
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Abstract
A welding method for U-shaped ribs of an orthotropic deck plate of a bridge girder comprises the following steps that: 1) bevels are formed at the outer sides of the U-shaped ribs, each truncated edge P is 1-3mm, and the angle alpha of each bevel is 45-55 degrees; 2) the U-shaped ribs are longitudinally arranged on the deck plate and are positioned on the deck plate; 3) the deck plate is fixed on a reversible deformation jig frame, and the reversible deformation angle is 0.3-0.45 degrees; and 4) the U-shaped ribs are wholly welded on the deck plate through a solid welding wire argon-riched shielded welding process. According to the welding method, the defects in the prior art can be overcome, and the welding method has the advantages that the safety and the reliability are good, the efficiency is high, the cost is low, etc.
Description
Technical field
The invention belongs to bridge steel structure welding technology field, be specifically related to a kind of bridge cross bridge floor board U-shaped rib welding method.
Background technology
Orthotropic plate bridge deck is a kind of bridge deck structure being welded into a whole longitudinal U-shaped ribbed stiffener, transverse stiffener and floorings to bear wheel load.It is made up of floorings, U-shaped rib and cross rib, and three is vertical each other, jointly works.Compared with other bridge floors, it can bear the direct effect of vehicle wheel load, participate in again the cooperation of girder simultaneously, thus it with lightweight, save steel, advantage that bearing capacity is high is widely used in countries in the world bridge especially Longspan Bridge.In orthotropic plate bridge deck structure, the weld seam of panel and longitudinal U-shaped rib is intensive, general is all elongated, welding capacity is very large, and the fusion length of a small bridge U-shaped rib and panel is at tens km, and the fusion length of a large bridge U-shaped rib and panel can reach one or two hundred kilometers.The weldquality of U rib groove weld directly affects the fatigue life of bridge, and the designing technique conditional request of this weld seam is: joint penetration degree arrives 75% ~ 80% of U rib plate thickness, and can not weld leakage, and weld appearance is shaped good, and transition is even suitable.
In current bridge steel structure manufactures, the welding of the U rib groove weld of cross bridge floor board, adopts thin flux-cored wire CO automatically
2protection weldering (FCAM-GA) one in ship shape position or twice welding.Due to the welding arc characteristic of FCAM itself, the skill set requirements of this kind of method to U rib retaining wall on slope precision and welding operation work is all higher, otherwise easily form slag inclusion in groove root, penetration degree is difficult to reach or exists and the weld defect such as burns and can only weld in jig frame special shaped position of going on board, one piece of floorings needs just can complete whole welding under two stations, transverse presentation bull gate-type cannot be realized once floorings have been welded, cause production efficiency lower.In addition, owing to producing volume of smoke when medicine core welds, pollute larger.
Summary of the invention
The technical problem that the present invention solves: a kind of bridge cross bridge floor board U-shaped rib welding method is provided, avoids the weak point in background technology, and there is the advantages such as safe and reliable, efficient, low cost.
Mentality of designing of the present invention: full-argon gas shielded arc welding, due to the welding arc characteristic of itself, easily obtains the mode of metal transfer of jet, and electric arc fusion penetration is comparatively large, easily solves the problem of U rib penetration degree; The slag adopting solid welding wire full-argon gas shielded arc welding to produce and flux-cored wire CO
2the slag characteristic that protection weldering is formed is different, to floating in the process that the slag of solid welding wire full-argon gas shielded arc welding solidifies in molten bath, fundamentally solves the problem of root of weld slag inclusion; Owing to easily obtaining larger fusion penetration, therefore root face size can be strengthened, reduce retaining wall on slope amount, reduce weld metal loading, save the cost of welding material; To the adjustment of weld pool surface tension force can realize transverse presentation welding and appearance of weld is attractive in appearance, also can adopt simultaneously bull gate-type weld once one piece of floorings is soldered, greatly enhance productivity, reduce production cost; Adopting solid welding wire can not resemble flux-cored wire and produce a large amount of flue dust, is a kind of comparatively clean welding procedure.
Technical solution of the present invention:
1) at the outside bevel of U-shaped rib, root face P is 1-3mm, bevel angle α is 45-55 °;
2) longitudinal for U-shaped rib being placed on floorings is had good positioning;
3) be fixed on reversely deformed jig frame by floorings, reversible deformation angle is 0.3-0.45 °;
4) solid welding wire rich-chlorine gas protection welding is adopted to be welded on elongated for U-shaped rib on floorings.
The yield strength of described floorings is 345-390Mpa, and the thickness of U-shaped rib is 6-8mm.
Described solid welding wire adopts ER50-6, φ 1.6mm welding wire, and described protective gas is argon gas and CO
2mist, and argon gas ratio is 65-85%.
Described welding adopts transverse presentation multiple operator, first the U-shaped rib on floorings is had good positioning by design attitude longitudinal arrangement, then floorings are fixed on reversely deformed jig frame, again transverse presentation bull gate-type automatic welder(welding machine) is arranged on the top of reversely deformed jig frame, make floorings be positioned at the welding post of transverse presentation bull gate-type automatic welder(welding machine), then adopt transverse presentation welding manner to be welded on elongated for U-shaped rib together on floorings.
Described welding adopts accommodation welding, is first had good positioning by design attitude longitudinal arrangement by the U-shaped rib on floorings, then adopts accommodation welding manner to be welded on elongated for U-shaped rib on floorings together, and during the welding of accommodation, the angle of inclination of floorings is 13-45 °.
Described solid welding wire rich-chlorine gas protection welding parameter is: welding current 240-360A, arc voltage 26-34V, speed of welding 30-40cm/min, stem elongation 20-25mm, gas flow 20-25L/min.
The advantage that the present invention compared with prior art has and effect:
1, the present invention adopts argon-rich mixed gas to weld, and reduces the oxygen content in welding process, weld metal mechanical property, and especially impact property is obviously better than the weld seam that flux-cored wire welds.
2, the present invention fundamentally solves U rib groove root and easily produces the problem that slag inclusion or depth of penetration be difficult to ensure, and suitably strengthens root face to guarantee depth of penetration substantially without affecting.
3, the present invention can increase root face size, reduces beveling machine labor content, reduces filling area, save welding material.
4, the present invention adopts one welding to complete, and greatly enhances productivity.
5, the present invention can realize transverse presentation welding, bull can be adopted simultaneously to weld, increase substantially production efficiency further.
6, present invention reduces the difficulty of welding operation work, integrated cost, compared with background technology, significantly reduces.
Accompanying drawing explanation
Fig. 1 is that the present invention adopts transverse presentation bull gate-type to weld schematic diagram,
Fig. 2 is that the present invention adopts accommodation welding manner schematic diagram,
Fig. 3 is U-shaped rib of the present invention and floorings groove schematic diagram,
Fig. 4 is U-shaped rib of the present invention and floorings weld path schematic diagrams.
Detailed description of the invention
Below in conjunction with accompanying drawing 1,3,4, the first embodiment of the present invention is described.
1) at the outside bevel of 6mm U-shaped rib 3, root face P is 1.5mm, bevel angle α is 50 °;
2) on floorings 1, spot welding mode is adopted to have good positioning by design attitude longitudinal arrangement in U-shaped rib 3 again;
3) be that the floorings 1 of 345MPa ~ 390Mpa are fixed on reversely deformed jig frame 2 by yield strength, reversible deformation angle is 0.4 °;
4) transverse presentation bull gate-type automatic welder(welding machine) 4 is arranged on the top of reversely deformed jig frame 2, makes floorings 1 be positioned at the welding post of transverse presentation bull gate-type automatic welder(welding machine) 4, then adopt transverse presentation welding manner to be welded on elongated for U-shaped rib 3 together on floorings 1.Described welding adopts solid welding wire rich-chlorine gas protection welding.Described solid welding wire adopts ER50-6, φ 1.6mm welding wire, and described protective gas is argon gas and CO
2mist, and argon gas ratio is 75%.Welding condition is: welding current 260-320A; Arc voltage 26-30V; Speed of welding 40-46cm/min; Stem elongation 20-25mm; Throughput 20-25L/min.
Below in conjunction with accompanying drawing 2,3,4, the second embodiment of the present invention is described.
1) at the outside bevel of 8mm U-shaped rib 3, root face P is 2.5mm, bevel angle α is 55 °;
2) on floorings 1, spot welding mode is adopted to have good positioning by design attitude longitudinal arrangement in U-shaped rib 3 again;
3) be that the floorings 1 of 345MPa ~ 390Mpa are fixed on reversely deformed jig frame 2 by yield strength, reversible deformation angle is 0.35 °;
4) adopt accommodation welding manner to be welded on elongated for U-shaped rib 3 together on floorings 1, and during the welding of accommodation, the angle of inclination of floorings 1 is 13-45 °.Described welding adopts solid welding wire rich-chlorine gas protection welding.Described solid welding wire adopts ER50-6, φ 1.6mm welding wire, and described protective gas is argon gas and CO
2mist, and argon gas ratio is 80%.Welding condition is: welding current 280-360A; Arc voltage 30-34V; Speed of welding 30-36cm/min; Stem elongation 20-25mm; Throughput 25L/min.
Above-described embodiment, just preferred embodiment of the present invention, is not used for limiting practical range of the present invention, therefore all equivalence changes done with content described in the claims in the present invention, all should be included within the claims in the present invention scope.
Claims (3)
1. a bridge cross bridge floor board U-shaped rib welding method, is characterized in that described method comprises the steps:
1) at the outside bevel of U-shaped rib (3), root face P is 1-3mm, bevel angle α is 45-55 °;
2) longitudinal for U-shaped rib (3) being placed on floorings (1) is had good positioning;
3) be fixed on reversely deformed jig frame (2) by floorings (1), reversible deformation angle is 0.3-0.45 °;
4) solid welding wire rich-chlorine gas protection welding is adopted to be welded on floorings (1) by elongated for U-shaped rib (3);
The yield strength of described floorings (1) is 345-390Mpa, and the thickness of U-shaped rib (3) is 6-8mm;
Described solid welding wire adopts ER50-6, φ 1.6mm welding wire, and protective gas is argon gas and CO
2mist, and argon gas ratio is 65-85%;
Described solid welding wire rich-chlorine gas protection welding parameter is: welding current 240-360A, arc voltage 26-34V, speed of welding 30-40cm/min, stem elongation 20-25mm, gas flow 20-25L/min.
2. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 1, it is characterized in that: described welding adopts transverse presentation multiple operator, first the U-shaped rib (3) on floorings (1) is had good positioning by design attitude longitudinal arrangement, then floorings (1) are fixed on reversely deformed jig frame (2), again transverse presentation bull gate-type automatic welder(welding machine) (4) is moved to the top of reversely deformed jig frame (2), floorings (1) are made to be positioned at the welding post of transverse presentation bull gate-type automatic welder(welding machine) (4), then transverse presentation welding manner is adopted to be welded on elongated for U-shaped rib (3) together on floorings (1).
3. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 1, it is characterized in that: described welding adopts accommodation welding, first the U-shaped rib (3) on floorings (1) is had good positioning by design attitude longitudinal arrangement, then adopt accommodation welding manner to be welded on elongated for U-shaped rib (3) together on floorings (1), and during the welding of accommodation, the angle of inclination of floorings (1) is 13-45 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210064113.9A CN102601498B (en) | 2012-03-13 | 2012-03-13 | Welding method for U-shaped ribs of orthotropic plate of bridge girder |
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| CN201210064113.9A CN102601498B (en) | 2012-03-13 | 2012-03-13 | Welding method for U-shaped ribs of orthotropic plate of bridge girder |
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| CN102601498A CN102601498A (en) | 2012-07-25 |
| CN102601498B true CN102601498B (en) | 2015-04-22 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056491B (en) * | 2012-12-18 | 2015-04-22 | 中铁山桥集团有限公司 | Automatic assembly method for orthotropic plate unit U-shaped ribs |
| CN103862142B (en) * | 2014-03-20 | 2016-01-20 | 中铁山桥集团有限公司 | Orthotropic plate U-shaped angle of rib weld seam robot prosposition single track balanced welding method |
| JP6257489B2 (en) * | 2014-09-26 | 2018-01-10 | 株式会社神戸製鋼所 | Gas shield arc welding method |
| CN104439737A (en) * | 2014-10-31 | 2015-03-25 | 武船重型工程股份有限公司 | U rib plate unit welding method |
| CN105436674A (en) * | 2016-01-13 | 2016-03-30 | 上海振华重工(集团)股份有限公司 | Full penetration welding process |
| CN106180983A (en) * | 2016-08-19 | 2016-12-07 | 高兴 | A kind of welding method of U rib |
| CN106312353A (en) * | 2016-10-19 | 2017-01-11 | 武船重型工程股份有限公司 | U-shaped rib welding device and method |
| 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 |
| CN108526741A (en) * | 2018-04-19 | 2018-09-14 | 中铁宝桥集团有限公司 | A kind of welding structure and its welding method of steel bridge Beam Plate Elements ribbed stiffener end |
| CN108436320A (en) * | 2018-05-28 | 2018-08-24 | 湖北天图桥梁技术研究有限公司 | A kind of U ribs and orthotropic plate unit and its welding manufacture method |
| CN109570707A (en) * | 2018-11-15 | 2019-04-05 | 中铁宝桥（扬州）有限公司 | A kind of Steel Bridge U rib plate block complete penetration welding method |
| CN112276303B (en) * | 2020-10-23 | 2022-06-24 | 中铁山桥集团有限公司 | Stainless steel U-shaped rib butt welding method with water drainage function |
| CN114932295B (en) * | 2022-06-23 | 2023-12-01 | 广州文船重工有限公司 | Welding method |
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| CN101722350A (en) * | 2010-01-18 | 2010-06-09 | 武船重型工程有限公司 | Steel bridge U-shaped rib welding process |
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| CN102275026A (en) * | 2010-06-08 | 2011-12-14 | 上海振华重工(集团)股份有限公司 | Welding process for U-shaped rib of steel bridge panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008018458A (en) * | 2006-07-13 | 2008-01-31 | Ihi Corp | Stiffening plate, and method for manufacturing the same |
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| CN201505792U (en) * | 2009-10-23 | 2010-06-16 | 武汉一冶钢结构有限责任公司 | Reverse deformation tire rack for steel box beam U rib welding |
| CN101722350A (en) * | 2010-01-18 | 2010-06-09 | 武船重型工程有限公司 | Steel bridge U-shaped rib welding process |
| CN102275026A (en) * | 2010-06-08 | 2011-12-14 | 上海振华重工(集团)股份有限公司 | Welding process for U-shaped rib of steel bridge panel |
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