CN104588834B - A kind of welding method of steel pipes with straight - Google Patents
A kind of welding method of steel pipes with straight Download PDFInfo
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- CN104588834B CN104588834B CN201410853263.7A CN201410853263A CN104588834B CN 104588834 B CN104588834 B CN 104588834B CN 201410853263 A CN201410853263 A CN 201410853263A CN 104588834 B CN104588834 B CN 104588834B
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- welding
- straight
- steel pipes
- groove
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
- B23K9/0253—Seam welding; Backing means; Inserts for rectilinear seams for the longitudinal seam of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/022—Welding by making use of electrode vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- 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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- 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
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
Abstract
The invention belongs to welding technology field, it is related to a kind of welding method of steel pipes with straight, in order to solve to carry out steel pipes with straight during joint close welding, back chipping work cannot effectively be carried out between interior weldering and outside weld, so that the joint close welding quality of whole steel pipes with straight is subject to strong influence, the invention provides a kind of welding method of steel pipes with straight, the welding method of the steel pipes with straight includes：A, the step of carry out tack welding to steel pipes with straight welding groove；B, the step of carry out interior weldering to steel pipes with straight welding groove；C, the step of carry out back chipping to steel pipes with straight；D, the step of carry out outside weld to steel pipes with straight；The step of b step includes that carrying out MAG to the welding groove inside steel pipes with straight welds, the step of Step d includes that carrying out SAW to the welding groove outside steel pipes with straight welds, the welding groove is from inside steel pipes with straight in terms of outside direction, in inverted V-shaped, the technical scheme can effectively solve the problem that above-mentioned technical problem.
Description
Technical field
The invention belongs to welding technology field, it is related to a kind of welding method of steel pipes with straight, steel pipes with straight of the present invention
Thickness be 6mm-24mm.As special case of the invention, when the steel pipes with straight material for using is Q235, Q345 steel, MAG used
Welding wire is ER50-6, and SAW welding wires are H08MnA, and solder flux is HJ431, used when the steel pipes with straight material for using is Q420B
MAG welding wires are ER55-D2, and SAW welding wires are H10Mn2, and solder flux is SJ101.
Background technology
Steel pipes with straight refers to be deformed into be welded into again after the shapes such as circle, taper, surface with steel band or steel plate bending to have
The steel pipe of seam, is carried out being welded as butt welding at present to steel pipes with straight, but is not that disposable welding is completed, and steel pipes with straight is being closed
Pre- postwelding is stitched, also needs first to weld (also cry outside weld) the part welding groove on the outside of steel pipes with straight, outside weld is produced
Welding root carry out back chipping, the welding groove inside the steel pipes with straight is welded (also cry interior weldering) again then, for
The less steel pipes with straight of bore, technical staff is difficult to complete back chipping work in steel pipes with straight, therefore, the conjunction of whole steel pipes with straight
Seam welding can all be subject to strong influence.
The content of the invention
The technical problem to be solved in the invention is when carrying out joint close to steel pipes with straight to weld, between interior weldering and outside weld
Back chipping work cannot effectively be carried out, so that the joint close welding quality of whole steel pipes with straight is subject to strong influence, and be directed to
The problem provides a kind of welding method of steel pipes with straight, and the welding method of the steel pipes with straight includes：
A, the step of carry out tack welding to steel pipes with straight welding groove；
B, the step of carry out interior weldering to steel pipes with straight welding groove；
C, the step of carry out back chipping to steel pipes with straight；
D, the step of carry out outside weld to steel pipes with straight；
The step of b step includes that carrying out MAG to the welding groove inside steel pipes with straight welds, the Step d includes
The step of carrying out SAW to the welding groove outside steel pipes with straight and weld, the welding groove is from inside steel pipes with straight to outside side
To seeing, in inverted V-shaped.
Unlike the prior art, the present invention considers first to carry out interior weldering to steel pipes with straight, and steel pipes with straight is carried out outward again then
Weldering, completely back chipping work can so be transferred to outside steel pipes with straight is carried out, and technical staff is tired of for back chipping works again
It is angry, on the other hand, can by the application of joint close welding procedure to the less steel pipes with straight of some bores (for example for pipe
Footpath less than 1000mm steel pipe) joint close welding.Technical staff can carry out joint close from any solder technology to steel pipes with straight
Welding, such as interior weldering and outside weld can use same solder technology, advantage of this is that in some joint close welding qualities
Do well (such as good anti-impact force and the curved power of anti-system) on measurement index, but can be because single solder technology cannot be simultaneously
The welding requirements of interior weldering and outside weld is adapted to completely and some technological deficiencies inevitably occurs, for example, use submerged-arc welding skill completely
Then art, typically first carry out weldering and submerged arc outside weld in submerged arc to welding groove again using manual gas shield welding bottoming, if but using submerged arc
Interior weldering, then must be using the smaller current of less stable, and the interior weldering electric arc of the submerged arc of low current easily causes and do not merge, stings
The weld defect such as side, incompletely filling.
Therefore, the present invention wishes that compared with prior art, such a joint close solder technology can be obtained, can be extremely
(anti-impact force as mentioned above and anti-system are curved for the advantage of maintenance prior art some indexs on joint close welding quality is weighed less
Power) and can significantly lift the other weak tendency index that influence joint close welds total quality.Steel pipes with straight of the present invention
Welding method, respectively the interior weldering step and outside weld step to welding groove employ different solder technology, use different welderings
The beneficial effect of connection technology can be the different welding requirements of weldering and outside weld in adapting to, but often be unable to maintain that existing weld seam strong
Advantage in terms of degree, the present invention is first welded to steel pipes with straight welding groove by the way of MAG welding, then again to vertical masonry joint
Steel-pipe welding groove is welded by the way of SAW welding, before welding, welding groove first is shaped into inverted V-shaped,
Can thus make MAG welding manners in the case of less root face gap by welding groove root penetration, present invention discover that
Interior weldering is carried out using MAG welding manners in the welding groove of steel pipes with straight to be not only able to make to be located at the weld seam table inside steel pipes with straight
There are larger lifting, and what is more important in face in terms of outward appearance, due to being used in combination for MAG welding and SAW welding, can be with
The weld seam that the part that MAG welding manners are produced is located inside steel pipes with straight is in the great majority (example to the contribution rate of weld seam bulk strength
As more than 65%), due to the visuality of MAG welding, the adjustable welding parameter scope of technical staff has been obtained effectively
Extension, so as to be added significantly to technical staff adjust steel pipes with straight bulk strength ability, at least maintain use single welding
Technical advantage of the mode in terms of weld strength.
In addition, the design of inverted V-shaped welding groove can provide larger molten bath space for outside weld, the molten of SAW outside welds is improved
Composition and division in a proportion, reverses SAW to be welded on the inferior position in weld strength, finally on the premise of welding cost is reduced, can still obtain good
Good weld strength.
It is proposed that the groove gap is arranged on less size range, such as within 1mm, it might even be possible to no
Need groove gap, welding gun carries out weld job it is possible thereby to concentrate in fairly small scope, make the welding straight line rate of interior weldering
Reach more than 98%.
Further, welding groove angle of the present invention is as follows：
| Steel pipes with straight thickness/mm | Welding groove angle |
| 6 | 60° |
| 8 | 60° |
| 10 | 60° |
| 12 | 50° |
| 14 | 50° |
| 16 | 40° |
| 18 | 40° |
| 20 | 40° |
| 22 | 40° |
| 24 | 40° |
It is another so as on the premise of weld strength is ensured, on the one hand reduce the metal filled amount that SAW welding is used
Aspect decreases the probability of happening of SAW outside weld burn-through welding grooves, expands technical staff's adjustment SAW outside weld various parameters
Scope, effectively avoids such a technology awkward situation, i.e., the SAW outside welds parameter obtained by technical staff can when SAW welding
To the contribution rate of the joint close welding quality of steel pipes with straight to perfect condition, and resulting SAW outside weld parameters are enough to burn-through
Welding groove, causes to have to abandon resulting SAW outside weld parameters.As can be seen here, it is of the invention by the root face clearance control
The probability of success that the present invention realizes goal of the invention can be increased in minimum scope.
As a kind of preferred, the technique effect further enhanced produced by smaller groove gap of the invention, MAG welding
During advise ceaselessly swinging welding gun, the hunting frequency is 60-90 times/min, and amplitude of fluctuation is as follows：
| Steel pipes with straight thickness/mm | Torch swinging amplitude/mm |
| 6~10 | 3~5 |
| 10~14 | 5~7 |
| 14~18 | 7~10 |
| 18~24 | 10~12 |
The direction of swing generally along the direction (namely horizontal direction) perpendicular with MAG welding directions (i.e. longitudinal),
Even if so as on the premise of welding groove of the present invention is stayed root face, the regulation that technical staff still can be bold is follow-up
The parameter of SAW outside welds and be unlikely to burn-through, and ensure at least to make welding groove complete penetration in SAW outside weld steps simultaneously, it is complete
It is complete avoid weldering in the major defect that welding groove root is not merged, MAG also make welding groove steel pipes with straight interior welds into
The part weld seam of type possesses perfect outward appearance, and the part weld reinforcement is can be controlled between 0.8mm-3.0mm.
MAG is welded preceding adjustment welding gun with the angle of welding direction to 93.5 ° -94.5 ° by further suggestion of the invention, setting
Accurately the angle of welding gun and welding direction, can be such that reinforcement is further compressed, typically can be controlled in 1.1mm-2.8mm it
Between, while can also prevent from being produced in welding process burning phenomenon.
The part weld seam inside steel pipes with straight that MAG welding is formed is for the bulk strength of steel pipes with straight weld seam is provided
Most contribution rate, therefore the present invention attempts to improve the part weld seam inside steel pipes with straight that MAG welding is formed
Weld strength, wherein the technical scheme taken can be adjustment welding parameter, such as in the step of MAG is welded, MAG
The parameter of welding is as follows：
The final reinforcement for producing of MAG welding and the part weld width inside steel pipes with straight are as follows：
| Steel pipes with straight thickness/mm | MAG weld reinforcement/mm | MAG weld width/mm |
| 6~10 | 1.2~1.5 | 4~6 |
| 10~14 | 1.5~2.0 | 6~8 |
| 14~18 | 2.0~2.3 | 8~11 |
| 18~24 | 2.0~2.4 | 11~13 |
After the interior weldering to steel pipes with straight is completed, it is possible to directly carry out back chipping to steel pipes with straight, technical staff exists
Implement just can sufficiently realize the technique effect that the present invention is brought during back chipping step, back chipping step is very simple by what is become
It is single, by MAG welds brought high-quality outward appearance (being particularly at the part weld appearance inside steel pipes with straight), do not have substantially
Burr is produced, clearing amount is few, while technical staff inside entrance steel pipes with straight without back chipping is carried out, only need to be in steel pipes with straight
Outside grinding wheel just can by back chipping everything goes well with your work complete.
And for follow-up SAW outside welds, the present invention takes many when interior weldering is carried out to steel pipes with straight with MAG welding manners
The mode of kind, the various factors for adjusting obstruction SAW welding parameters is suppressed (such as to weld SAW in order to avoid burn-through
The limitation that parameter is carried out), SAW can be given full play to and be welded on the potentiality burn-on outside steel pipes with straight of the present invention, SAW welding bags
Filling weldering and outside weld capping are included, such that it is able to be applied to the steel pipes with straight of different-thickness, for thicker steel pipes with straight, SAW welderings
Connecing can include repeatedly filling weldering, when substantially welding groove filling is finished, then carry out outside weld capping, the welding of the SAW
Parameter is as follows：
The resulting part weld seam outside steel pipes with straight has excellent outward appearance：
In addition, the strength test of overall weld seam shows, the weldering prepared using the welding method of steel pipes with straight of the present invention
It is sewn on when doing tension test and breaks in mother metal, and when bend test is done, there is not crackle and burr in weld seam.
Brief description of the drawings
After the completion of Fig. 1 is the interior weldering of steel pipes with straight described in embodiment, internally welded with electric angle grinder outside the weld seam of formation
Tiny burr carry out the structural representation of simple back chipping treatment.
Specific embodiment
Embodiment
A kind of welding method of steel pipes with straight, first mechanical to the welding groove of steel pipes with straight or flame processing mode adds
Work, makes welding groove surface flat smooth, while controlling weld gap for 0mm, then steel pipes with straight is welded, the welding
Welding groove of the process before this to steel pipes with straight by the way of MAG welding carries out positioning assembling, and welding gun is then adjusted again with weldering
The angle in direction is connect to 94 °, according to being welded in the mode that the parameter of table 1 is welded with MAG to steel pipes with straight.
Table 1
During being welded to steel pipes with straight with MAG welding manners, welding gun is kept ceaselessly to swing, the direction of swing
It is that, along the direction perpendicular with MAG welding directions, hunting frequency is 80 times/min, amplitude of fluctuation such as table 2.
Table 2
| Steel pipes with straight thickness/mm | Torch swinging amplitude/mm |
| 6~10 | 4 |
| 10~14 | 6 |
| 14~18 | 9 |
| 18~24 | 12 |
After the completion of the interior weldering of steel pipes with straight, tiny burr outside the weld seam of formation is only internally welded with electric angle grinder (i.e.
Fine protrusions) simple back chipping treatment is carried out, finally in the mode welded with SAW to carrying out outside weld outside steel pipes with straight,
The parameter of the outside weld is performed according to table 3.
Table 3
General principle of the invention, principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent is defined.
Claims (5)
1. a kind of welding method of steel pipes with straight, including：
A, the step of carry out tack welding to steel pipes with straight welding groove；
B, the step of carry out interior weldering to steel pipes with straight welding groove；
C, the step of carry out back chipping to steel pipes with straight；
D, the step of carry out outside weld to steel pipes with straight；
The step of b step includes that carrying out MAG to the welding groove inside steel pipes with straight welds, the Step d is included to straight
The step of welding groove outside seam steel pipe carries out SAW and welds, the welding groove from inside steel pipes with straight in terms of outside direction,
In inverted V-shaped, the step of the MAG is welded in, the parameter of MAG welding is as follows：
,
The step of SAW is welded includes being filled welding groove and cover welding, and the welding parameter of the SAW is as follows：
2. a kind of welding method of steel pipes with straight according to claim 1, it is characterised in that the groove of the welding groove
Gap is 0-1mm.
3. the welding method of a kind of steel pipes with straight according to claim 2, it is characterised in that the welding groove angle is such as
Under：
4. the welding method of a kind of steel pipes with straight according to claim 1, it is characterised in that the step of MAG is welded is wrapped
Include welding gun constantly to be swung in welding process, the hunting frequency is 60-90 times/min, amplitude of fluctuation is as follows：
5. the welding method of a kind of steel pipes with straight according to claim 1, it is characterised in that the b step is additionally included in
The angle of adjustment welding gun and welding direction is to 93.5 ° -94.5 ° before MAG welding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410853263.7A CN104588834B (en) | 2014-12-31 | 2014-12-31 | A kind of welding method of steel pipes with straight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410853263.7A CN104588834B (en) | 2014-12-31 | 2014-12-31 | A kind of welding method of steel pipes with straight |
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| CN104588834A CN104588834A (en) | 2015-05-06 |
| CN104588834B true CN104588834B (en) | 2017-06-13 |
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| CN106563862A (en) * | 2015-10-09 | 2017-04-19 | 江苏通宇钢管集团有限公司 | Welding technology of CC60 low temperature longitudinal welded pipe |
| CN107538142B (en) * | 2016-06-27 | 2019-11-01 | 扬州市通宇压力容器有限公司 | A kind of welding procedure of straight seam welded pipe |
| CN114799602B (en) * | 2022-06-01 | 2022-12-09 | 山东天厚石油科技有限责任公司 | Welding equipment and process for tungsten-plated and infiltrated oil pipe |
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| CN101462196B (en) * | 2008-12-31 | 2011-02-09 | 重庆大学 | Method and equipment for electromagnetic composite double-face submerged arc welding of diphase stainless steel thick plate |
| CN101890558A (en) * | 2010-07-07 | 2010-11-24 | 昆山华恒工程技术中心有限公司 | Automatically backing weld method of pipeline MAG |
| CN102717172B (en) * | 2012-06-01 | 2015-04-29 | 浙江盛达铁塔有限公司 | Welding method |
| JP6025620B2 (en) * | 2013-03-07 | 2016-11-16 | 株式会社神戸製鋼所 | Submerged arc welding method, method of manufacturing steel pipe using the submerged arc welding method, welded joint, and steel pipe having the welded joint |
| CN103231156B (en) * | 2013-04-09 | 2015-08-12 | 山东大学 | A kind of quick submerged-arc welding method that X90 pipe line steel manufactures |
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