CN102601498A - 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 PDF

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Publication number
CN102601498A
CN102601498A CN2012100641139A CN201210064113A CN102601498A CN 102601498 A CN102601498 A CN 102601498A CN 2012100641139 A CN2012100641139 A CN 2012100641139A CN 201210064113 A CN201210064113 A CN 201210064113A CN 102601498 A CN102601498 A CN 102601498A
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China
Prior art keywords
welding
shaped rib
floorings
bridge
floor board
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CN2012100641139A
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Chinese (zh)
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CN102601498B (en
Inventor
袁俊
孙立雄
张剑峰
车平
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中铁宝桥集团有限公司
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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

A kind of bridge orthotropic plate U-shaped rib welding method
Technical field
The invention belongs to the 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
The orthotropic plate bridge floor is a kind of vertical U-shaped ribbed stiffener, transverse stiffener and floorings to be welded into a whole in order to bear the bridge deck structure of wheel load.It is made up of floorings, U-shaped rib and cross rib, and the three is vertical each other, works jointly.Compare with other bridge floors; It can bear the direct effect of vehicle wheel load; The co-operation of simultaneously participating in girder again, thus it with in light weight, save steel, advantage that bearing capacity is high has obtained using widely in countries in the world bridge especially Longspan Bridge.Panel is intensive with the weld seam of vertical U-shaped rib in the orthotropic plate bridge deck structure; General all is elongated; Welding capacity is very big, and the fusion length of small bridge U-shaped rib and panel is about tens kilometers, and the fusion length of large bridge U-shaped rib and panel can reach one or two hundred kilometers.The weldquality of U rib groove weld directly influences the fatigue life of bridge, and the designing technique conditional request of this weld seam is: weld seam penetration degree arrives 75%~80% of U floor thickness, and can not weld leakage, and weld appearance is shaped good, and transition is even suitable.
In present bridge steel structure was made, automatically thin flux-cored wire CO was adopted in the welding of the U rib groove weld of cross bridge floor board 2One of protection weldering (FCAM-GA) or twice welding in the ship shape position.Because the welding arc characteristic of FCAM itself; This kind method requires all higher to U rib groove machining accuracy and welding operation worker's technical ability; Otherwise form slag inclusion at the groove root easily, the penetration degree is difficult to reach or exists and weld defect such as burn and can only weld in the special-purpose moulding bed shaped position of going on board; Floorings need could be accomplished all welding under two stations, can't realize that transverse presentation bull gate-type once welded floorings, cause production efficiency lower.In addition, produce volume of smoke during owing to the welding of medicine core, pollute bigger.
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 the background technology, and have advantage such as safe and reliable, efficient, low cost.
Mentality of designing of the present invention: argon-rich gas shielded weldering, owing to the welding arc characteristic of itself, obtain the mode of metal transfer of jet easily, the electric arc fusion penetration is bigger, solves the problem of U rib penetration degree easily; The slag and the flux-cored wire CO that adopt the argon-rich gas shielded weldering of solid welding wire to be produced 2The slag characteristic that the protection weldering forms is different, and the slag of the argon-rich gas shielded weldering of solid welding wire to come-up, has fundamentally solved the problem of root of weld slag inclusion in the process of weld pool solidifies; Owing to obtain big fusion penetration easily, so can strengthen the root face size, reduce the groove processing capacity, reduce the weld metal loading, practice thrift the cost of welding material; Adjustment to weld pool surface tension force can realize that transverse presentation is welded and appearance of weld is attractive in appearance, also can adopt the welding of bull gate-type once floorings to be welded simultaneously, enhances productivity greatly, reduces production costs; Adopting solid welding wire can not resemble that flux-cored wire is to produce a large amount of flue dust, is a kind of welding procedure that cleans.
Technical solution of the present invention:
1) bevel in the outside of U-shaped rib, root face P is 1-3mm, bevel angle α is 45-55 °;
2) the U-shaped rib is vertically placed on the floorings have good positioning;
3) floorings are fixed on the reversely deformed jig frame, the reversible deformation angle is 0.3-0.45 °;
4) adopt the solid welding wire rich-chlorine gas protection welding to be welded on the floorings the U-shaped rib is elongated.
The yield strength of said floorings is 345-390Mpa, and the thickness of U-shaped rib is 6-8mm.
Said solid welding wire adopts ER50-6, and φ 1.6mm welding wire, said protective gas are argon gas and CO 2Mist, and the argon gas ratio is 65-85%.
The welding of transverse presentation bull is adopted in said welding; At first the U-shaped rib on the floorings is vertically arranged by design attitude and had good positioning; Then floorings are fixed on the reversely deformed jig frame; Again transverse presentation bull gate-type automatic welder(welding machine) is arranged on the top of reversely deformed jig frame, makes floorings be positioned at the welding post of transverse presentation bull gate-type automatic welder(welding machine), adopt the transverse presentation welding manner to be welded on the floorings together the U-shaped rib is elongated then.
The accommodation welding is adopted in said welding, at first the U-shaped rib on the floorings is vertically arranged by design attitude and is had good positioning, and adopts the accommodation welding manner to be welded on the floorings together the U-shaped rib is elongated then, and the angle of inclination of floorings is 13-45 ° during the welding of accommodation.
Said 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.
Advantage that the present invention compared with prior art has and effect:
1, the present invention adopts the argon-rich mixed gas weldering, has reduced the oxygen content in the welding process, the weld seam that weld metal mechanical property, especially impact property obviously are superior to flux-cored wire is welded.
2, the present invention has fundamentally solved U rib groove root and has been easy to generate the problem that slag inclusion or depth of penetration are difficult to guarantee, and suitably strengthens root face to guaranteeing that depth of penetration does not have influence basically.
3, the present invention can increase the root face size, reduces the beveling machine labor content, reduces filling area, practices thrift welding material.
4, the present invention adopts one welding to accomplish, and enhances productivity greatly.
5, the present invention can realize the transverse presentation welding, can adopt bull to weld simultaneously, further increases substantially production efficiency.
6, the present invention has reduced welding operation worker's difficulty, and integrated cost is compared with background technology, reduces significantly.
Description of drawings
Fig. 1 adopts transverse presentation bull gate-type welding sketch map for the present invention,
Fig. 2 adopts accommodation welding manner sketch map for the present invention,
Fig. 3 is U-shaped rib of the present invention and floorings groove sketch map,
Fig. 4 is U-shaped rib of the present invention and floorings welding bead sketch map.
The specific embodiment
Below in conjunction with accompanying drawing 1,3,4 first kind of embodiment of the present invention described.
1) at the outside bevel of 6mm U-shaped rib 3, root face P is 1.5mm, and bevel angle α is 50 °;
2) vertically be arranged in floorings 1 on by design attitude U-shaped rib 3 again and adopt the spot welding mode to have good positioning;
3) be that the floorings 1 of 345MPa~390Mpa are fixed on the reversely deformed jig frame 2 with yield strength, the 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, adopt the transverse presentation welding manner then U-shaped rib 3 elongated being welded on together on the floorings 1.The solid welding wire rich-chlorine gas protection welding is adopted in said welding.Said solid welding wire adopts ER50-6, and φ 1.6mm welding wire, said protective gas are argon gas and CO 2Mist, and the 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 second kind of embodiment of the present invention described.
1) at the outside bevel of 8mm U-shaped rib 3, root face P is 2.5mm, and bevel angle α is 55 °;
2) vertically be arranged in floorings 1 on by design attitude U-shaped rib 3 again and adopt the spot welding mode to have good positioning;
3) be that the floorings 1 of 345MPa~390Mpa are fixed on the reversely deformed jig frame 2 with yield strength, the reversible deformation angle is 0.35 °;
4) adopt the accommodation welding manner with U-shaped rib 3 elongated being welded on together on the floorings 1, and the angle of inclination of floorings 1 is 13-45 ° during the welding of accommodation.The solid welding wire rich-chlorine gas protection welding is adopted in said welding.Said solid welding wire adopts ER50-6, and φ 1.6mm welding wire, said protective gas are argon gas and CO 2Mist, and the 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.
The foregoing description is preferred embodiment of the present invention, is not to be used for limiting practical range of the present invention, so all equivalences of being done with the said content of claim of the present invention change, all should be included within the claim scope of the present invention.

Claims (6)

1. a bridge cross bridge floor board U-shaped rib welding method is characterized in that said method comprises the steps:
1) at the outside bevel of U-shaped rib (3), root face P is 1-3mm, and bevel angle α is 45-55 °;
2) U-shaped rib (3) is vertically placed on the floorings (1) have good positioning;
3) floorings (1) are fixed on the reversely deformed jig frame (2), the reversible deformation angle is 0.3-0.45 °;
4) adopt the solid welding wire rich-chlorine gas protection welding to be welded on the floorings (1) U-shaped rib (3) is elongated.
2. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 1, it is characterized in that: the yield strength of said floorings (1) is 345-390Mpa, the thickness of U-shaped rib (3) is 6-8mm.
3. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 2 is characterized in that: said solid welding wire adopts ER50-6, and φ 1.6mm welding wire, said protective gas are argon gas and CO 2Mist, and the argon gas ratio is 65-85%.
4. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 3; It is characterized in that: the welding of transverse presentation bull is adopted in said welding; At first the U-shaped rib (3) on the floorings (1) is vertically arranged by design attitude and had good positioning; Then floorings (1) are fixed on the 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), make floorings (1) be positioned at the welding post of transverse presentation bull gate-type automatic welder(welding machine) (4), adopt the transverse presentation welding manner to be welded on together on the floorings (1) U-shaped rib (3) is elongated then.
5. a kind of bridge cross bridge floor board U-shaped rib welding method according to claim 3; It is characterized in that: the accommodation welding is adopted in said welding; At first the U-shaped rib (3) on the floorings (1) is vertically arranged by design attitude and had good positioning; Adopt the accommodation welding manner to be welded on together on the floorings (1) U-shaped rib (3) is elongated then, and the angle of inclination of floorings (1) is 13-45 ° during the welding of accommodation.
6. according to claim 4 or 5 described a kind of bridge cross bridge floor board U-shaped rib welding methods; It is characterized in that said 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.
CN201210064113.9A 2012-03-13 2012-03-13 Welding method for U-shaped ribs of orthotropic plate of bridge girder Active CN102601498B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103056491A (en) * 2012-12-18 2013-04-24 中铁山桥集团有限公司 Automatic assembly method for orthotropic plate unit U-shaped ribs
CN103862142A (en) * 2014-03-20 2014-06-18 中铁山桥集团有限公司 Flat position single-seam symmetrical welding method for orthotropic plate U-shaped rib corner welding seam robot
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
CN105458465A (en) * 2014-09-26 2016-04-06 株式会社神户制钢所 Gas-shielded arc welding method
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
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008018458A (en) * 2006-07-13 2008-01-31 Ihi Corp Stiffening plate, and method for manufacturing the same
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
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
CN201988875U (en) * 2011-03-23 2011-09-28 上海振华重工(集团)股份有限公司 Anti-distortion welding jig frame and anti-distortion welding base
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008018458A (en) * 2006-07-13 2008-01-31 Ihi Corp Stiffening plate, and method for manufacturing the same
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
CN201988875U (en) * 2011-03-23 2011-09-28 上海振华重工(集团)股份有限公司 Anti-distortion welding jig frame and anti-distortion welding base

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103056491A (en) * 2012-12-18 2013-04-24 中铁山桥集团有限公司 Automatic assembly method for orthotropic plate unit U-shaped ribs
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
CN103862142A (en) * 2014-03-20 2014-06-18 中铁山桥集团有限公司 Flat position single-seam symmetrical welding method for orthotropic plate U-shaped rib corner welding seam robot
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
CN105458465A (en) * 2014-09-26 2016-04-06 株式会社神户制钢所 Gas-shielded arc welding method
CN105458465B (en) * 2014-09-26 2017-08-25 株式会社神户制钢所 Gas-shielded 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
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

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