CN108856989A - Consumable electrode MIG is welded in the method for priming in pipeline welding - Google Patents
Consumable electrode MIG is welded in the method for priming in pipeline welding Download PDFInfo
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- CN108856989A CN108856989A CN201810791200.1A CN201810791200A CN108856989A CN 108856989 A CN108856989 A CN 108856989A CN 201810791200 A CN201810791200 A CN 201810791200A CN 108856989 A CN108856989 A CN 108856989A
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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
- B23K9/16—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
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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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
- B23K9/0052—Welding of pipe panels
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Abstract
The present invention relates to a kind of consumable electrode MIG to be welded in the method for priming in pipeline welding, belongs to pipeline welding technology field.When welding; welding groove is respectively set in docking end face in two pipes to be welded; and in positioned opposite to form double V-groove; the root gap of double V-groove is 3mm~5mm, and angle of bevel is 30 °~35 °, and the welding machine of bottom welding uses semi-automatic consumable electrode MAG welding equipment; protective gas uses the mixed gas of argon gas and carbon dioxide; it is calculated according to percent by volume, argon gas accounting is 95%, and carbon dioxide accounting is 5%.The present invention realizes the effect of MIG weldering, the welding defect that can be reduced construction cost, improve construction efficiency, conventional practices is avoided to occur using common semi-automatic consumable electrode MAG welding equipment.
Description
Technical field
The present invention relates to a kind of consumable electrode MIG to be welded in the method for priming in pipeline welding, belongs to pipeline welding technology field.
Background technique
Chemical industry is higher to the intensity and consistency requirements of pipeline and tank body, therefore requires the welding quality of pipeline tight
Lattice, the radiographic inspection of section of tubing require to reach level-one.In the prior art, the welding method high to requirements for pipes is all using argon
Arc-welding carries out the single face welding and double face shaping of root base welding bead, and manual welding is filled the welding of capping.But in large-diameter pipeline
When welding, the lower branch of big pipeline is almost the position for being in overhead welding and poplar weldering of climbing, and the operation of argon arc welding necessary one is hand-held
Welding gun, send welding wire on the other hand, two hands must matching coordinative just can guarantee weldquality.Conventional argon arc welding welding pipeline feeding method
There are interior silk filling (Fig. 1) and outer silk filling two kinds of (Fig. 2), and large-diameter pipeline is unable to complete operation according to one people of interior silk filling, it must
Must two cooperations could complete, and the tacit degree cooperated to two people and the requirement of skilled operation degree are also very high, and butt welding
The input amount of work obviously increases, and is considered according to the situation of enterprise and the preparation various aspects of personnel, we all using it is outer fill silk into
Row welding.When using outer silk filling method, two hands are welded in overhead weld position and are in overhead positions, it can without any dependence and supporting point
To guarantee the stationarity of both hands, and head is in and looks up state for a long time, and such operation posture gives welding to increase naturally
Difficulty, the unstable root that just not can guarantee welding wire and be correctly sent to weld seam of operator's hand, if welding wire is only sent in groove
Between, when wire melting is in conjunction with base material, due to the Gravitative Loads of overhead weld position fusing molten iron, forms weld seam meeting nature and stays,
Then there is natural etat lacunaire in the back side, and this phenomenon to be avoided to must assure that the gap of groove has to be larger than the straight of welding wire
Diameter just can guarantee that welding wire can be sent to nearly back of weld normal through groove in this way, though have after forming molten bath it is certain under
It collapses and also can guarantee that back of weld reinforcement and base material flush and slightly above base material, but due to many factors such as welding position, operation
Difficulty increases, and the welding of overhead weld position the recess (as shown in Figure 3) of the different depths always occurs, welding quality is made to be unable to get guarantor
Barrier.
Hand tungsten argon arc welding is replaced to carry out bottom welding using consumable electrode MIG weldering, it is ensured that the stationarity of hand, because
Consumable electrode MIG weldering is semi-automatic welding, welding wire by welding gun automatic feed there is no need to need independent wire feed as argon arc welding,
At this moment two-handed hand-held welding gun can be used, the arm of a hand can also lean on tube wall, considerably increase welding operation in this way
Stability.And the welding wire of consumable electrode MIG weldering is thin, it is easy to reach the root of groove, molten bath is short there are the time when welding
It is avoided that the phenomenon that molten bath stays, can effectively avoid the recess of bottom argon arc welding welding overhead weld position, and can also significantly improve
Construction efficiency, while the heat affected area of consumable electrode MIG weldering is narrow, weld seam cooling velocity is fast, and weldment deformation is small.
At present consumable electrode MIG Welding at home and abroad petroleum, have begun a large amount of utilizations in natural gas line, but from welding machine
The cost input of itself is larger, and for a professional consumable electrode MIG welding machine lowest price 50,000 or more, some equipment are semi-automatic
Soldering equipment one is up to hundreds of thousands, and the device is complicated than general consumable electrode for equipment, and general industry construction cost is put into
The use of the local equipment completely not directly proportional with profit reciprocation and more complicated for construction site also receives office
Limit.
Summary of the invention
The technical problem to be solved by the present invention is to：A kind of consumable electrode MIG method of priming being welded in pipeline welding is provided,
Realize the effect of MIG weldering, using common semi-automatic consumable electrode MAG welding equipment to reduce construction cost.
To solve above-mentioned technical problem the technical scheme adopted by the invention is that：Consumable electrode MIG is welded in pipeline welding
Method of priming, when welding, welding groove is respectively set in docking end face in two pipes to be welded, and in positioned opposite to form V
Type groove, the root gap of double V-groove are 3mm~5mm, and angle of bevel is 30 °~35 °, and the welding machine of bottom welding uses
Semi-automatic consumable electrode MAG welding equipment, protective gas uses the mixed gas of argon gas and carbon dioxide, according to volume percentage
It calculates, argon gas accounting is 95%, and carbon dioxide accounting is 5%.
It is further：Welded pipe line is in horizontal busy hour fixed and is labeled as minimum point on the circumferencial direction of weld seam
M, highest point are labeled as N, are taken a little labeled as P on a side weld of straight line MN, take one on another side weld of straight line MN
Point is labeled as Q, and the central angle of camber line MP is labeled as a, and the value of a is 55 °~65 °, and the central angle of camber line MQ is labeled as b, and b's takes
Value is 55 °~65 °；
When bottom welding, two halves are divided to weld weld seam using straight line MN as line of demarcation, when welding is with M point
Point；Welding current is 150A~180A, and voltage is 14V~17V.
In the weld seam in M point to P point range, the weld seam in M point to Q point range, it is all made of welding gun and leans forward method welding, welding gun
Angle with pipe skin is 100 °~105 °, and welding manner is some wire feeds, and each striking observes molten bath and two sides among weld seam
Blow-out immediately in groove fusion, wire feed position is in pipe dermatome portion；
In the weld seam in P point to N point range, the weld seam in Q point to N point range, it is all made of the welding of welding gun hypsokinesis method, welding gun
Angle with pipe skin is 80 °~90 °, and the method that welding manner uses two sides striking and two sides blow-out is once drawn in pipe skin groove
It fires electric arc to swing to another secondary groove immediately, observes the fused blow-out immediately of other side groove, then ignite at blow-out electric arc
Blow-out after swinging fusion well to other side groove repeats bottom welding of such movement up to completing entire weld seam.
It is further：As the outer diameter Φ of pipe>When 400mm, divide the weld into M point to P point, M point to Q point, P point to N point,
Q point is to four sections of progress bottom weldings of N point.
It is further：Welded pipe line is in vertical busy hour fixed, and the welding current of bottom welding is 120A~130A, electricity
Pressure is 13V~14V；Striking position is welded in a manner of the fortune rifle of oblique circle from top to bottom close to upper bevelled edge, transports rifle track
Ultimately form a spiral shape；When pipe skin thickness>Then using even arc welding when 16mm, when pipe skin thickness≤16mm if using disconnected
Arc welding, current interruption are welded often around complete one oblique circle, that is, blow-out, then are done next oblique circle again from the blow-out position electric arc that ignites and transported
Make, is sequentially completed the welding of backing run in this way.
It is further：Before bottom welding, first carry out positioning welding in commissure, tack weld length be 20mm~
30mm, the electric angle grinder reconditioning of tack weld both ends go out gentle slope.
The beneficial effects of the invention are as follows：Through practice have shown that, weldquality of the invention is able to satisfy service performance.The present invention adopts
Cooperate effective operation technique with welding method appropriate, can be realized using common semi-automatic consumable electrode MAG welding equipment
The effect of MIG weldering, both solves problems of welded quality, reduces deformation and the stress of weldment, while improving welding production efficiency,
Not only shortening the duration also saves construction cost.Present invention is particularly suitable for construction environment complexity, the limited portions in construction site
Position, can reach the construction requirement of argon tungsten-arc welding, when being also avoided that Tig Welding large-diameter pipeline, go out in overhead weld position
The phenomenon that existing indent, is suitble to all metallurgy, building trade and the private enterprise to use in large-diameter pipeline welding, is conducive to mention
High flaw detection qualification rate and construction efficiency reduce cost of labor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in the prior art when being welded using interior silk filling mode；
Fig. 2 is the structural schematic diagram in the prior art when being welded using outer silk filling mode；
Fig. 3 is the structural schematic diagram of concave defect in weld seam overhead weld position in the prior art；
Fig. 4 is the segment welded structure schematic diagram in the present invention；
Fig. 5 is the structural schematic diagram of the angle of welding gun variation in the present invention；
The welding manner schematic diagram of some wire feeds is used in Fig. 6 present invention；
The welding manner schematic diagram of two sides striking and two sides blow-out is used in Fig. 7 present invention；
Fig. 8 is that tiltedly circle transports the schematic diagram of rifle mode in the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
Consumable electrode MIG is welded in the method for priming in pipeline welding, and when welding, two pipes to be welded are distinguished in docking end face
Welding groove is set, and in positioned opposite to form double V-groove, the root gap of double V-groove is 3mm~5mm, single bevel corner
Degree is 30 °~35 °, and the welding machine of bottom welding uses semi-automatic consumable electrode MAG welding equipment, and protective gas uses argon gas and dioxy
The mixed gas for changing carbon, calculates according to percent by volume, and argon gas accounting is 95%, and carbon dioxide accounting is 5%.
Before bottom welding, positioning welding is first carried out in commissure, tack weld length is 20mm~30mm, tack weld two
End electric angle grinder reconditioning goes out gentle slope to guarantee joint quality.It should also be by 10mm~20mm inside and outside weld groove before welding
Iron rust cleaning oil pollution in range is clean, welding wire use ER49-1 Ф 1.2mm welding wire, carry out tack welding when should be with formal weld seam
Unanimously.
As shown in Figures 4 to 7, welded pipe line is in horizontal busy hour fixed, on the circumferencial direction of weld seam, by minimum point mark
It is denoted as M, highest point is labeled as N, is taken a little labeled as P, on another side weld of straight line MN on a side weld of straight line MN
It takes a little labeled as Q, the central angle of camber line MP is labeled as a, and the value of a is 55 °~65 °, and the central angle of camber line MQ is labeled as b, b
Value be 55 °~65 °；The value of a and b usually chooses identical value；
When bottom welding, two halves are divided to weld weld seam using straight line MN as line of demarcation, when welding is with M point
Point；Welding current is 150A~180A, and voltage is 14V~17V.
In the weld seam in M point to P point range, the weld seam in M point to Q point range, it is all made of welding gun and leans forward method welding, welding gun
Angle with pipe skin is 100 °~105 °, and welding manner is some wire feeds, and each striking observes molten bath and two sides among weld seam
Blow-out immediately in groove fusion, wire feed position is in pipe dermatome portion；Here wire feed position cannot be only sent among groove, otherwise due to
The gravity in molten bath, the too deep phenomenon that easily occurs that groove weld joint on inner side is excessively high and back of weld is recessed.
In the weld seam in P point to N point range, the weld seam in Q point to N point range, it is all made of the welding of welding gun hypsokinesis method, welding gun
Angle with pipe skin is 80 °~90 °, and the method that welding manner uses two sides striking and two sides blow-out is once drawn in pipe skin groove
It fires electric arc to swing to another secondary groove immediately, observes the fused blow-out immediately of other side groove, then ignite at blow-out electric arc
Blow-out after swinging fusion well to other side groove repeats bottom welding of such movement up to completing entire weld seam, in this way
It can avoid internal overlap phenomenon.
In addition, when caliber is larger, can also divide the weld into multistage welding, the present invention to be further ensured that welding quality
It is preferred that the embodiment used is as the outer diameter Φ of pipe>When 400mm, M point is divided the weld into P point, M point to Q point, P point to N
Point, Q point to four sections of progress bottom weldings of N point.
Welded pipe line is in vertical busy hour fixed, and the welding current of bottom welding is 120A~130A, voltage be 13V~
14V；Striking position is welded in a manner of the fortune rifle of oblique circle from top to bottom close to upper bevelled edge, as shown in figure 8, fortune rifle rail
Mark ultimately forms a spiral shape；When pipe skin thickness>When 16mm then using even arc welding, when pipe skin thickness≤16mm if use
Current interruption welding, current interruption are welded often around complete one oblique circle, that is, blow-out, then do next oblique circle again from the blow-out position electric arc that ignites
Running, is sequentially completed the welding of backing run in this way.
It, should will be in connector and part in order to avoid slag inclusion and incomplete fusion phenomenon occurs in interlayer after backing run welds
Between the welding that there is the position of clip slot to carry out next process after smooth again using electric angle grinder reconditioning of raised two sides, interlayer and lid
The method that the welding of surface layer can select according to the actual situation manual welding and gas metal-arc welding.
Embodiment one：
Welding base metal：The material of pipe is 20, and the outer diameter Φ of pipe is 273mm, wall thickness 8mm；It is horizontal fixation between two pipes
Position welding.
Welding equipment and material：Welding machine is adopted using NBC-350 carbon dioxide gas shielded welding machine routinely, protective gas
It with the mixed gas of argon gas and carbon dioxide, is calculated according to percent by volume, argon gas accounting is 95%, and carbon dioxide accounting is
5%；Welding wire uses the welding wire of ER49-1 Ф 1.2mm.
Groove setting：Using double V-groove, root gap 4mm, angle of bevel is 30 °.
The running parameter of welding equipment：Welding current is 150A~180A, and voltage is 14V~17V.
Welding operation：On the circumferencial direction of weld seam, minimum point is labeled as M, highest point is labeled as N, straight line MN's
It takes a little labeled as P, is taken on another side weld of straight line MN a little labeled as Q, the center of circle footmark of camber line MP on one side weld
It is denoted as a, the value of a is 60 °, and the central angle of camber line MQ is labeled as b, and the value of b is 60 °；
When bottom welding, two halves are divided to weld weld seam using straight line MN as line of demarcation, when welding is with M point
Point；
In the weld seam in M point to P point range, the weld seam in M point to Q point range, it is all made of welding gun and leans forward method welding, welding gun
Angle with pipe skin is 100 °~105 °, and welding manner is some wire feeds, and each striking observes molten bath and two sides among weld seam
Blow-out immediately in groove fusion, wire feed position is in pipe dermatome portion.
In the weld seam in P point to N point range, the weld seam in Q point to N point range, it is all made of the welding of welding gun hypsokinesis method, welding gun
Angle with pipe skin is 80 °~90 °, and the method that welding manner uses two sides striking and two sides blow-out is once drawn in pipe skin groove
It fires electric arc to swing to another secondary groove immediately, observes the fused blow-out immediately of other side groove, then ignite at blow-out electric arc
Blow-out after swinging fusion well to other side groove repeats bottom welding of such movement up to completing entire weld seam.
Welding quality inspection：Using range estimation without inspection, pore-free, slag inclusion, incomplete fusion, depth are stung greater than 0.5mm's for outside
Side is qualification, and the internal check of pipe welding port is carried out using radiographic inspection, and welded weld bond can reach the above radiographic inspection of second level
Quality.
Embodiment two：
Welding base metal：The material of pipe is 20, and the outer diameter Φ of pipe is 600mm, wall thickness 6mm；It is horizontal fixation between two pipes
Position welding.
Welding equipment and material：Welding machine is adopted using NBC-350 carbon dioxide gas shielded welding machine routinely, protective gas
It with the mixed gas of argon gas and carbon dioxide, is calculated according to percent by volume, argon gas accounting is 95%, and carbon dioxide accounting is
5%；Welding wire uses the welding wire of ER49-1 Ф 1.2mm.
Groove setting：Using double V-groove, root gap 4mm, angle of bevel is 35 °.
The running parameter of welding equipment：Welding current is 150A~180A, and voltage is 14V~17V.
Welding operation：On the circumferencial direction of weld seam, minimum point is labeled as M, highest point is labeled as N, straight line MN's
It takes a little labeled as P, is taken on another side weld of straight line MN a little labeled as Q, the center of circle footmark of camber line MP on one side weld
It is denoted as a, the value of a is 60 °, and the central angle of camber line MQ is labeled as b, and the value of b is 60 °；
M point is divided the weld into P point, M point to Q point, P point to N point, Q point to four sections of progress bottom weldings of N point, when welding
Using M point as initial starting point；
In the weld seam in M point to P point range, the weld seam in M point to Q point range, it is all made of welding gun and leans forward method welding, welding gun
Angle with pipe skin is 100 °~105 °, and welding manner is some wire feeds, and each striking observes molten bath and two sides among weld seam
Blow-out immediately in groove fusion, wire feed position is in pipe dermatome portion.
In the weld seam in P point to N point range, the weld seam in Q point to N point range, it is all made of the welding of welding gun hypsokinesis method, welding gun
Angle with pipe skin is 80 °~90 °, and the method that welding manner uses two sides striking and two sides blow-out is once drawn in pipe skin groove
It fires electric arc to swing to another secondary groove immediately, observes the fused blow-out immediately of other side groove, then ignite at blow-out electric arc
Blow-out after swinging fusion well to other side groove repeats bottom welding of such movement up to completing entire weld seam.
Welding quality inspection：Using range estimation without inspection, pore-free, slag inclusion, incomplete fusion, depth are stung greater than 0.5mm's for outside
Side is qualification, is detected using the internal soundness that ultrasonic wave carries out pipeline, welding quality can reach ultrasonic wave level-one.
Embodiment three：
Welding base metal：The material of pipe is 20, and the outer diameter Φ of pipe is 325mm, wall thickness 6mm；It is vertical fixation between two pipes
Position welding.
Welding equipment and material：Welding machine is adopted using NBC-350 carbon dioxide gas shielded welding machine routinely, protective gas
It with the mixed gas of argon gas and carbon dioxide, is calculated according to percent by volume, argon gas accounting is 95%, and carbon dioxide accounting is
5%；Welding wire uses the welding wire of ER49-1 Ф 1.2mm.
Groove setting：Using double V-groove, root gap 4mm, angle of bevel is 30 °.
The running parameter of welding equipment：Welding current is 120A~130A, and voltage is 13V~14V.
Welding operation：Striking position is welded in a manner of the fortune rifle of oblique circle from top to bottom close to upper bevelled edge, is such as schemed
Shown in 8, fortune rifle track ultimately forms a spiral shape；It is welded using current interruption.
Welding quality inspection：Using range estimation without inspection, pore-free, slag inclusion, incomplete fusion, depth are stung greater than 0.5mm's for outside
Side is qualification, and the internal check of pipe welding port is carried out using radiographic inspection, and welded weld bond can reach the above radiographic inspection of second level
Quality.
Claims (5)
1. consumable electrode MIG is welded in the method for priming in pipeline welding, when welding, two pipes to be welded are set respectively in docking end face
Welding groove is set, and in positioned opposite to form double V-groove, it is characterised in that：The root gap of double V-groove is 3mm~5mm,
Angle of bevel is 30 °~35 °, and the welding machine of bottom welding uses semi-automatic consumable electrode MAG welding equipment, and protective gas uses
The mixed gas of argon gas and carbon dioxide, calculates according to percent by volume, and argon gas accounting is 95%, and carbon dioxide accounting is 5%.
2. consumable electrode MIG as described in claim 1 is welded in the method for priming in pipeline welding, it is characterised in that：Welded pipe line
In horizontal busy hour fixed, on the circumferencial direction of weld seam, minimum point is labeled as M, highest point is labeled as N, straight line MN's
It takes a little labeled as P, is taken on another side weld of straight line MN a little labeled as Q, the center of circle footmark of camber line MP on one side weld
It is denoted as a, the value of a is 55 °~65 °, and the central angle of camber line MQ is labeled as b, and the value of b is 55 °~65 °；
When bottom welding, two halves are divided to weld weld seam using straight line MN as line of demarcation, using M point as starting point when welding；Weldering
Connecing electric current is 150A~180A, and voltage is 14V~17V.
In the weld seam in M point to P point range, the weld seam in M point to Q point range, it is all made of welding gun and leans forward method welding, welding gun and pipe
The angle of skin is 100 °~105 °, and welding manner is some wire feeds, and each striking is among weld seam, observation molten bath and two sides groove
Blow-out immediately in fusion, wire feed position is in pipe dermatome portion；
In the weld seam in P point to N point range, the weld seam in Q point to N point range, it is all made of the welding of welding gun hypsokinesis method, welding gun and pipe
The angle of skin is 80 °~90 °, and the method that welding manner uses two sides striking and two sides blow-out is once ignited electricity in pipe skin groove
Arc is swung to another secondary groove immediately, observes the fused blow-out immediately of other side groove, and the electric arc that then ignites at blow-out is to another
Side groove swings blow-out after fusion well, repeats bottom welding of such movement up to completing entire weld seam.
3. consumable electrode MIG as claimed in claim 2 is welded in the method for priming in pipeline welding, it is characterised in that：When outside pipe
Diameter Φ>When 400mm, M point is divided the weld into P point, M point to Q point, P point to N point, Q point to four sections of progress bottom weldings of N point.
4. consumable electrode MIG as described in claim 1 is welded in the method for priming in pipeline welding, it is characterised in that：Welded pipe line
In vertical busy hour fixed, the welding current of bottom welding is 120A~130A, and voltage is 13V~14V；Striking position is close
Upper bevelled edge is welded in a manner of the fortune rifle of oblique circle from top to bottom, and fortune rifle track ultimately forms a spiral shape；When pipe skin depth
Degree>When 16mm then using even arc welding, when pipe skin thickness≤16mm if use current interruption to weld, current interruption welding often around complete one tiltedly
Circle, that is, blow-out, then next oblique circle running is done again from the blow-out position electric arc that ignites, it is sequentially completed the weldering of backing run in this way
It connects.
5. the consumable electrode MIG as described in any one of Claims 1-4 is welded in the method for priming in pipeline welding, feature
It is：Before bottom welding, positioning welding is first carried out in commissure, tack weld length is 20mm~30mm, tack weld both ends
Go out gentle slope with electric angle grinder reconditioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791200.1A CN108856989B (en) | 2018-07-18 | 2018-07-18 | Priming method for fusion electrode MIG welding in pipeline welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810791200.1A CN108856989B (en) | 2018-07-18 | 2018-07-18 | Priming method for fusion electrode MIG welding in pipeline welding |
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| CN108856989B CN108856989B (en) | 2020-11-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102861A (en) * | 2019-05-08 | 2019-08-09 | 中石化第十建设有限公司 | A kind of metal transfer of MIG/MAG accurately controls one side welding with back formation method |
| CN110640274A (en) * | 2019-09-27 | 2020-01-03 | 中车长江车辆有限公司 | MAG inverted butt joint single-side welding and double-side forming welding method |
| CN110732747A (en) * | 2019-09-16 | 2020-01-31 | 广州文冲船厂有限责任公司 | Welding method |
| CN112372107A (en) * | 2020-11-06 | 2021-02-19 | 攀钢集团工程技术有限公司 | Application method of consumable electrode pulse TG5 inverter welding machine in pipeline welding |
-
2018
- 2018-07-18 CN CN201810791200.1A patent/CN108856989B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102861A (en) * | 2019-05-08 | 2019-08-09 | 中石化第十建设有限公司 | A kind of metal transfer of MIG/MAG accurately controls one side welding with back formation method |
| CN110732747A (en) * | 2019-09-16 | 2020-01-31 | 广州文冲船厂有限责任公司 | Welding method |
| CN110640274A (en) * | 2019-09-27 | 2020-01-03 | 中车长江车辆有限公司 | MAG inverted butt joint single-side welding and double-side forming welding method |
| CN110640274B (en) * | 2019-09-27 | 2022-03-22 | 中车株洲车辆有限公司 | MAG inverted butt joint single-side welding and double-side forming welding method |
| CN112372107A (en) * | 2020-11-06 | 2021-02-19 | 攀钢集团工程技术有限公司 | Application method of consumable electrode pulse TG5 inverter welding machine in pipeline welding |
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| Publication number | Publication date |
|---|---|
| CN108856989B (en) | 2020-11-10 |
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