CN109365967A - A kind of welding method for the big groove gap of submerged-arc welding - Google Patents
A kind of welding method for the big groove gap of submerged-arc welding Download PDFInfo
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- CN109365967A CN109365967A CN201811285878.9A CN201811285878A CN109365967A CN 109365967 A CN109365967 A CN 109365967A CN 201811285878 A CN201811285878 A CN 201811285878A CN 109365967 A CN109365967 A CN 109365967A
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- welding
- groove
- metal powder
- weld
- submerged
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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
- B23K9/18—Submerged-arc welding
-
- 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
-
- 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
- B23K9/32—Accessories
Abstract
The invention discloses a kind of welding methods for the big groove gap of submerged-arc welding, specifically includes the following steps: putting up glass fibre ceramic liner at the welding groove back side when weld groove gap (referred to as big groove gap) within the scope of 9-12mm；Metal powder is laid in welding groove；Weld backing run；Weld filler pass；Weld final pass.Operation of the present invention method is simple, easy to use, by using the method puted up glass fibre ceramic liner and be laid with metal powder, realizes the Lincoln weld one side welding with back formation overproof to assembly groove gap.Welding efficiency is improved, reduces the waste of material in groove rework process, reduces production cost, improve welding quality.
Description
Technical field
The invention belongs to welding for steel structure fields, and in particular to a kind of welding method for the big groove gap of submerged-arc welding.
Background technique
Lincoln weld is a kind of efficient automatic soldering method, with the gas metal-arc welding of excellent performance or its
Its welding method is compared, and has that production efficiency is higher, weldquality is higher, saves welding material and good excellent of the energy, working condition
Point, therefore one of the main welding method selection that can be used as steel construction construction.
In steel construction building course, because being influenced by factors such as precision controlling, construction personnel's levels of skill, submerged-arc welding slope
Mouthful gap causes the phenomenon that burning in welding process there are overproof.It currently encounters problems and mainly uses consumable electrode gas
Body protection weldering carries out replacing welding, and welding efficiency is low, and due to being influenced by welder's technical ability with construction environment, backing weld seam welding
It easily cracks, reduces welding quality.And reprocessed using ressembling or changing the measures such as plate, it will seriously affect production
Progress increases production cost.Therefore it must study a kind of high-efficient and can not influence to give birth to assuring welding quality
The welding scheme of production progress.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of welding side for the big groove gap of submerged-arc welding
Method, this method are realized super to assembly groove gap using the method puted up glass fibre ceramic liner and be laid with metal powder
The Lincoln weld one side welding with back formation of difference.
To achieve the above object, the invention adopts the following technical scheme:
A kind of welding method for the big groove gap of submerged-arc welding, method includes the following steps:
Step 1, glass fibre ceramic liner is puted up at the welding groove back side of steel plate, the gap a of the welding groove is 9-
12mm,
Step 2, it is laid with metal powder in welding groove, surface solder flux is covered on welding groove, the surface solder flux will weld
It connects groove to be completely covered, welding wire is passed through into surface solder flux and is protruded into metal powder, described welding wire one end is in contact with metal powder,
The other end is in contact with surface solder flux,
Step 3, backing run is welded: using the welding current of 820A-910A, the arc voltage of 35V-38V, 30cm/min-
The speed of travel of 33cm/min welds backing run, removes welding slag after the completion of backing run welding, clears up welding bead surface, back side weldering
Slit width degree d is 14mm-15mm, and weld reinforcement h is 2mm-3mm；
Step 4: welding filler pass on the backing run after step 3 welding: using the welding current of 705A-785A, 34V-
The arc voltage of 37V, the speed of travel of 35cm/min-47cm/min weld filler pass in a manner of the welding of shunting；
Step 5: welding final pass on the filler pass after step 4 welding: using the welding current of 755A-840A, 30V-
The arc voltage of 31V, the speed of travel of 42cm/min-48cm/min weld final pass in a manner of the welding of shunting, weld
Cheng Zhong, weld reinforcement h are controlled in 1mm-3mm.
The specific steps of glass fibre ceramic liner are puted up in the step 1 are as follows: peel off glass fibre ceramic liner first
On heat-shrinking plastics paper, the center that glass fibre ceramic pads is aligned with the center of welding groove, is then struck
Glass fibre ceramic liner is hit, makes glass fibre ceramic liner and welding groove back side close adhesion, adjacent glass fibers is made to make pottery
Gapless between system liner.
The specific steps of metal powder are laid in the step 2 in welding groove are as follows: first uniformly spread metal powder
It is located in welding groove, then using scraper plate by metal powder drawout, and reaches specified and be laid with height, when steel plate thickness is not more than
When 20mm, it is that steel plate thickness subtracts 5mm that metal powder, which is laid with height, and when plate thickness is greater than 20mm, the laying height of metal powder is
15mm。
The angle [alpha] of the welding groove is 45 ° -60 °.
The root face p of the welding groove is 0mm-2mm.
The final pass includes two layers of welding bead.
Compared with prior art, the invention has the benefit that
The method of the present invention is easy to operate, easy to use, pads and be laid with metal powder by using glass fibre ceramic is puted up
Method realizes the Lincoln weld one side welding with back formation overproof to assembly groove gap.Welding efficiency is improved, is reduced
Waste of material in groove rework process, reduces production cost；And pass through the test to being welded using the present invention program
Plate carries out non-destructive testing, do not find weld seam there are any welding defect, and mechanical property (impact property, stretching of the breadboard
Intensity, bending property) it meets the requirements of the standard, improve welding quality.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Fig. 2 is the principle of the present invention figure.
Fig. 3 is the structural schematic diagram of welding groove of the present invention.
Fig. 4 is welding process welding bead arrangement schematic diagram of the present invention.
Fig. 5 is -20 DEG C of low-temperature impact sample position figures of weld seam of the present invention.
Wherein, a is Weld pipe mill in Fig. 5, and b is melt run, and c is that melt run+2mm, d are melt run+5mm.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings specific
Embodiment describes the present invention.However, it should be understood that these descriptions are merely illustrative, it is not intended to limit the scope of the invention.
In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid it is unnecessary obscure it is of the invention general
It reads.
The present embodiment is to illustrate this hair with a thickness of the EH36 steel plate position one side welding with back formation butt welding of 20mm
Bright welding scheme.
As Figure 1-Figure 4, the present embodiment is used for the welding method of the big groove gap of submerged-arc welding, and this method includes following step
It is rapid:
Step 1, glass fibre ceramic liner 2 is puted up at 1 back side of welding bevel of steel plate, the gap a of the welding groove 1 is 9-
12mm,
Step 2, metal powder 3 is laid in welding groove 1, the laying height of metal powder 3 is 15mm, on welding groove 1
Surface solder flux 4 is covered, welding groove 1 is completely covered the surface solder flux 4, and welding wire 5 is passed through surface solder flux 4 and protrudes into metal powder
In end 3, described 5 one end of welding wire is in contact with metal powder 3, the other end is in contact with surface solder flux 4, spreads in welding groove 1
If metal powder be iron powder, can not only make up the inhomogeneities of welding groove, at the same play prevent electric arc close to liner
Place burn, guarantee arc stability, increase deposition rate improve welding efficiency,
Step 3, backing run 6 is welded: using the welding current of 820A-910A, the arc voltage of 35V-38V, 30cm/min-
The speed of travel of 33cm/min welds backing run, and the backing run is first layer welding bead, and backing run welding is completed to move back
Except welding slag, welding bead surface is cleared up using motor wire brush；Sealing run width d is 14mm-15mm, and weld reinforcement h is 2mm-
3mm, groove root fusion are good；Fillet in normal shear dimple, but seamlessly transitted between the groove face of two sides, when the step 3 is welded
It is welded using 1600 type automatic submerged-arc welding machines, using the solder flux of larger output-current rating, is conducive to export stable weldering
It connects electric current and guarantees that electric arc sufficiently melts the iron powder of laying；Simultaneously using the generator characteristic of decompression, guarantee electric arc stablizes burning,
Avoid occurring the welding defects such as groove side wall incomplete fusion in the welding process,
Step 4: step 3 welding after backing run 6 on weld filler pass 7: using the welding current of 705A-785A,
The arc voltage of 34V-37V, the speed of travel of 35cm/min-47cm/min weld filler pass in a manner of the welding of shunting；
Step 5: step 4 welding after filler pass 7 on weld final pass 8: using the welding current of 755A-840A,
The arc voltage of 30V-31V, the speed of travel of 42cm/min-48cm/min weld final pass in a manner of the welding of shunting, cover
Face welding bead 8 includes two layers of welding bead.
Preferably, putting up the specific steps of glass fibre ceramic liner 2 in step 1 described in the present embodiment are as follows: shell first
The heat-shrinking plastics paper for going glass fibre ceramic to pad, by the center of glass fibre ceramic liner 2 and welding groove 1
Then center alignment taps glass fibre ceramic liner 2, keep glass fibre ceramic liner 2 close with 1 back side of welding groove
Bonding makes gapless between adjacent glass fibers ceramic liner 2.
As further preferred, the specific step of metal powder 3 is laid in step 2 described in the present embodiment in welding groove 1
Suddenly are as follows: metal powder 3 is uniformly laid in welding groove 1 first, then using scraper plate by 3 drawout of metal powder, and is reached
Specified to be laid with height, when steel plate thickness is not more than 20mm, it is that steel plate thickness subtracts 5mm that metal powder 3, which is laid with height, when steel plate thickness is greater than
When 20mm, the laying height of metal powder 3 is 15mm.
As further preferred, the angle [alpha] of welding groove 1 described in the present embodiment is 45 ° -60 °.
As still more preferably, the root face p of welding groove 1 described in the present embodiment is 0mm-2mm.
Welding equipment in the present embodiment are as follows: MZ-1600 single electrode Lincoln weld welding equipment of showing severity.In the present embodiment
Welding variables in this implementation, is shown in Table 1.
1 welding variables of table
Welding bead 1,2 respectively backing run 6, filler pass 7,3,4 refer to two layers of final pass 8 in above-mentioned table 1.
For the weld properties that the impact value of -20 DEG C of low-temperature impact sample position of weld seam in Fig. 5 detects, it is shown in Table
2。
2 weld properties of table
Impact test selection standard is that CB/T2650-2008 under the conditions of -20 DEG C, is taken respectively from root run as shown in Table 2
Center, root run melt run, root run melt run+2mm, root run melt run+5mm.The present invention applies to FAB technology
Overproof Gap Weld is welded, welding performance meets China Classification Society " material and welding conditions " requirement.
By carrying out non-destructive testing to the breadboard being welded using the present invention program, not finding weld seam, there are any welderings
Defect is connect, and the mechanical property (impact property, tensile strength, bending property) of the breadboard is met the requirements of the standard.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, and those of ordinary skill in the art should be with understanding；Still
It can modify to a specific embodiment of the invention or some technical characteristics are replaced on an equal basis；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (6)
1. a kind of welding method for the big groove gap of submerged-arc welding, which is characterized in that method includes the following steps:
Step 1, glass fibre ceramic is puted up at the welding groove of steel plate (1) back side and pad (2), between the welding groove (1)
Gap a is 9-12mm,
Step 2, metal powder (3) are laid in welding groove (1), cover surface solder flux (4) on welding groove (1), it is described
Welding groove (1) is completely covered surface solder flux (4), and welding wire (5) are passed through surface solder flux (4) and are protruded into metal powder (3), institute
State that welding wire (5) one end is in contact with metal powder (3), the other end is in contact with surface solder flux (4),
Step 3, backing run (6) are welded: using the welding current of 820A-910A, the arc voltage of 35V-38V, 30cm/min-
The speed of travel of 33cm/min welds backing run, removes welding slag after the completion of backing run welding, clears up welding bead surface, back side weldering
Slit width degree d is 14mm-15mm, and weld reinforcement h is 2mm-3mm；
Step 4: welding filler pass (7) on the backing run (6) after step 3 welding: using the welding electricity of 705A-785A
Stream, the arc voltage of 34V-37V, 35cm/min-47cm/min the speed of travel by shunting welding in a manner of weld filler pass；
Step 5: welding final pass (8) on the filler pass (7) after step 4 welding: using the welding electricity of 755A-840A
Stream, the arc voltage of 30V-31V, 42cm/min-48cm/min the speed of travel by shunting welding in a manner of weld final pass.
2. the welding method according to claim 1 for the big groove gap of submerged-arc welding, which is characterized in that the step 1
In put up glass fibre ceramic liner (2) specific steps are as follows: peel off first glass fibre ceramic liner on heat-shrinking plastics
The center of glass fibre ceramic liner (2) is aligned with the center of welding groove (1), then taps glass fibers by paper
Ceramic liner (2) is tieed up, makes glass fibre ceramic liner (2) and welding groove (1) back side close adhesion, adjacent glass fibers is made to make pottery
Gapless between system liner (2).
3. the welding method according to claim 1 for the big groove gap of submerged-arc welding, which is characterized in that the step 2
In the specific steps of metal powder (3) are laid in the welding groove (1) are as follows: metal powder (3) is uniformly laid on welding first
In groove (1), then using scraper plate by metal powder (3) drawout, and reach specified and be laid with height, when steel plate thickness is not more than 20mm
When, it is that steel plate thickness subtracts 5mm that metal powder (3), which is laid with height, when steel plate thickness is greater than 20mm, the laying height of metal powder (3)
For 15mm.
4. the welding method according to claim 1 for the big groove gap of submerged-arc welding, which is characterized in that the welding slope
The angle [alpha] of mouth (1) is 45 ° -60 °.
5. the welding method according to claim 1 for the big groove gap of submerged-arc welding, which is characterized in that the welding slope
The root face p of mouth (1) is 0mm-2mm.
6. the welding method according to claim 1 for the big groove gap of submerged-arc welding, which is characterized in that the cosmetic welding
Road (8) includes two layers of welding bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285878.9A CN109365967B (en) | 2018-10-31 | 2018-10-31 | Welding method for large groove gap of submerged-arc welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285878.9A CN109365967B (en) | 2018-10-31 | 2018-10-31 | Welding method for large groove gap of submerged-arc welding |
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| CN109365967A true CN109365967A (en) | 2019-02-22 |
| CN109365967B CN109365967B (en) | 2021-04-06 |
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Cited By (5)
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|---|---|---|---|---|
| CN110560849A (en) * | 2019-09-05 | 2019-12-13 | 广州黄船海洋工程有限公司 | soft gasket single-side submerged arc welding process for EH36 high-strength steel thick plate |
| CN110883407A (en) * | 2019-10-24 | 2020-03-17 | 上海江南长兴造船有限责任公司 | Method for solving welding joint defects in production |
| CN111992859A (en) * | 2020-08-26 | 2020-11-27 | 上海外高桥造船有限公司 | Powder spreading device |
| CN113941763A (en) * | 2021-11-22 | 2022-01-18 | 江苏科技大学 | Shaking/rotating arc consumable electrode welding method adopting coarse welding wire |
| CN114589379A (en) * | 2022-04-18 | 2022-06-07 | 山东蓬翔汽车有限公司 | Axle body longitudinal weld root gap local out-of-tolerance welding method |
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|---|---|---|---|---|
| CN110560849A (en) * | 2019-09-05 | 2019-12-13 | 广州黄船海洋工程有限公司 | soft gasket single-side submerged arc welding process for EH36 high-strength steel thick plate |
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| CN110883407A (en) * | 2019-10-24 | 2020-03-17 | 上海江南长兴造船有限责任公司 | Method for solving welding joint defects in production |
| CN111992859A (en) * | 2020-08-26 | 2020-11-27 | 上海外高桥造船有限公司 | Powder spreading device |
| CN111992859B (en) * | 2020-08-26 | 2022-04-05 | 上海外高桥造船有限公司 | Powder spreading device |
| CN113941763A (en) * | 2021-11-22 | 2022-01-18 | 江苏科技大学 | Shaking/rotating arc consumable electrode welding method adopting coarse welding wire |
| CN114589379A (en) * | 2022-04-18 | 2022-06-07 | 山东蓬翔汽车有限公司 | Axle body longitudinal weld root gap local out-of-tolerance welding method |
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| CN109365967B (en) | 2021-04-06 |
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