CN106862730A - A kind of vertical butt welding method of slab - Google Patents
A kind of vertical butt welding method of slab Download PDFInfo
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- CN106862730A CN106862730A CN201710201481.6A CN201710201481A CN106862730A CN 106862730 A CN106862730 A CN 106862730A CN 201710201481 A CN201710201481 A CN 201710201481A CN 106862730 A CN106862730 A CN 106862730A
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention discloses a kind of vertical butt welding method of slab; docking weldment is provided; welding groove is opened up on the docking weldment; being welded in the groove using CO2 gas shields is carried out welding and forms weld seam prime coat, is welded on the weld seam prime coat to weld using vertical gas-electric and is completed remaining groove and fill.Groove is first welded using CO2 gas shielded arc weldings; the weld seam prime coat for being difficult to burn-through can be formed in groove and positioned at groove bottom or the back side; and then ensure the follow-up welding quality using vertical electro-gas welding; two kinds of welding manners are combined to weld thicker docking weldment and can not only reduce operation difficulty; welding quality is improved, the heat input of welding can also be effectively reduced.
Description
Technical field
The present invention relates to welding technology field, more particularly to a kind of vertical butt welding method of slab.
Background technology
Pre- carrying and carrying stage in shipbuilding industry, vertical gas-electric is typically used for vertical butt weld more long
The mode of weldering is welded, and during welding, ceramic substrate or copper lining is pasted at the back side of sheet material butting grooves, once welds positive and negative
Shaping, completes the welding of whole vertical butt weld, and this welding manner applies in general to docking of the sheet metal thickness less than 32mm.Work as plate
Material thickness, then must be semi-automatic using CO2 more than 32mm and in the vertical docking of the sheet material for having particular/special requirement in terms of intensity or toughness
Or the automatic welding of multilayer multiple tracks is welded.
The welding manner of the vertical butt welding of existing slab has following defect：If 1. thick plates are using vertical gas-electric
Weldering, the requirement for steel plate and packing material is higher, if not using the steel plate and packing material of import, the weld seam after welding
The minimum mechanical property requirements of joint needs are extremely difficult to, therefore the cost of welding can be increased, and operation difficulty is high, middle interruption
The probability of arc and burn-through is high, and when there is current interruption or burn-through, being required to positive and negative carries out carbon plane and study for a second time courses one has flunked, and greatly reduces
The efficiency of welding；2. ship carries the stage, and play movement fluctuating change is larger, if slab is using vertical electro-gas welding, sweating heat
Input quantity can also be widely varied therewith, easily cause joint mechanical property situation not up to standard to occur；3. using semi-automatic or
During automatic CO2 gas shielded arc weldings, the number of plies of thick plates is more, and the welding parameter of every layer of welding is also limited within 280A, because
This welding efficiency is relatively low；4. semi-automatic CO2 gas shielded arc weldings belong to manual operations, and for welder's technical ability in itself, sense of responsibility will
Ask higher, the number of plies needs connection and reasonable arrangement during welding, during the angle that produces or defect must remove after can carry out down one
Welding, stability of the welding quality is relatively poor.
The content of the invention
It is an object of the invention to：There is provided a kind of slab vertical butt welding method, its can effectively improve speed of welding and
The quality of weld seam.
It is that, up to above-mentioned purpose, the present invention uses following technical scheme：
There is provided a kind of slab vertical butt welding method, there is provided docking weldment, welding slope is opened up on the docking weldment
Mouthful, being welded in the groove using CO2 gas shields is carried out welding and forms weld seam prime coat, and the weldering is welded in using vertical gas-electric
Welded on seam prime coat and complete remaining groove filling.
Used as a kind of preferred scheme of the vertical butt welding method of slab, the groove is single groove, its groove bottom position
In the back side of the docking weldment, its groove top is located at the front of the docking weldment.
Preferably, the groove is one side double V-groove.
More preferred, the angle of the groove is 30 °~45 °.
Used as a kind of preferred scheme of the vertical butt welding method of slab, specific step is as follows：
S10, pre-treatment, groove is opened up by the docking weldment, and the groove is cleared up；
S20, backing welding, are welded in the groove using CO2 gas shields and weld 2~3 layers of formation weld seam prime coat,
The thickness of the weld seam prime coat is 10~15mm；
S30, cosmetic welding, are welded using the vertical electro-gas welding part unwelded to the groove, until whole weld seam
Welding is completed.
As a kind of preferred scheme of the vertical butt welding method of slab, gone back between the step S10 and the step S20
Setting steps S11, at the back side of the docking weldment and it is located at the bottom of the groove and is pasted with pad, described pad blocks institute
State the bottom of groove.
Used as a kind of preferred scheme of the vertical butt welding method of slab, the pad is provided near the side of the groove
Groove, the width of the width more than the gap of the groove bottom of the groove.
Preferably, the groove is to be directed away from the recessed arcuate structure in the groove side.
As a kind of preferred scheme of the vertical butt welding method of slab, step S40, postwelding are also set up after the step S30
Treatment, removes pad, the weld seam of groove both sides is polished, until face of weld and the flush for docking weldment.
Used as a kind of preferred scheme of the vertical butt welding method of slab, the groove of the docking weldment is double groove.
Preferably, the double groove is included near the docking positive front groove of wlding and near the butt welding
The underside groove at the material back side, the bevel angle of the front groove is 30 °~45 °, and the bevel angle of the underside groove is 40 °
~50 °.
As a kind of preferred scheme of the vertical butt welding method of slab, comprise the following steps that：
S100, pre-treatment, groove is opened up by the docking weldment, and the groove is cleared up；
S200, stickers lining pad, in the bottom stickers lining pad of the front groove of the groove, make the front groove of the groove and the back of the body
Face groove is not connected；
S300, backing welding, are welded in the underside groove of the groove using CO2 gas shields and welded, until filling is complete
The individual underside groove；
S400, cleaning, the welding slag in cleaning pad and the front groove；
S500, cosmetic welding, are welded using vertical electro-gas welding to the front groove, until complete of filling is described just
Face groove.
Used as a kind of preferred scheme of the vertical butt welding method of slab, the pad is the pad of pole shape, and its diameter is omited
More than the bottom gap of the groove.
Used as a kind of preferred scheme of the vertical butt welding method of slab, the welding current of the vertical electro-gas welding is 400-
500A, weldingvoltage is 40-44V, and speed of welding is 4-8cm/min.
Preferably, the CO2 gas shielded arc weldings use the flux-cored wire of a diameter of 1.2mm, and model number is E81T1-K2.
The vertical electro-gas welding uses the flux-cored wire of a diameter of 1.6mm, and the trade mark is DW-S1LG or SC-EG3.
More preferred, the pad is copper lining or ceramic substrate.
Further, the bottom gap of the single groove is 5-16mm.
Further, the bottom gap of the double groove is 5-16mm.
Further, the underside groove depth of the double groove is 10-15mm.
Further, the thickness of the docking weldment is 32-50mm.
Beneficial effects of the present invention are：The vertical docking welding method of the slab of this programme is using CO2 gas shielded arc weldings to slope
Mouth is first welded, and the weld seam prime coat that be difficult to burn-through, Jin Erbao can be formed in groove and positioned at groove bottom or back
The follow-up welding quality using vertical electro-gas welding of card, two kinds of welding manners combine to weld thicker docking weldment not only may be used
To reduce operation difficulty, welding quality is improved, can also effectively reduce the heat input of welding.
Brief description of the drawings
The present invention is described in further detail below according to drawings and Examples.
Fig. 1 is the state diagram that the docking weldment of the embodiment of the present invention one opens up single groove.
Fig. 2 is the state diagram that the docking weldment of the embodiment of the present invention one attaches pad.
Fig. 3 is state diagram of the docking weldment of the embodiment of the present invention one in backing welding.
Fig. 4 is state diagram of the docking weldment of the embodiment of the present invention one in cosmetic welding.
Fig. 5 is the state diagram that the docking weldment of the embodiment of the present invention two opens up double groove.
Fig. 6 is the state diagram that the docking weldment of the embodiment of the present invention two attaches pad.
Fig. 7 is state diagram of the docking weldment of the embodiment of the present invention two in backing welding.
Fig. 8 is state diagram of the docking weldment of the embodiment of the present invention two in cosmetic welding.
In Fig. 1-4：
110th, weldment is docked；120th, pad；121st, groove；130th, weld seam prime coat；140th, weld cap layer；150th, one side
Groove.
In Fig. 5-8：
210th, weldment is docked；220th, pad；230th, weld seam prime coat；240th, weld cap layer；250th, double groove；251、
Front groove；252nd, underside groove.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that uses and the technique effect that reaches it is clearer, below
The technical scheme of the embodiment of the present invention will be described in further detail with reference to accompanying drawing, it is clear that described embodiment is only
It is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, the scope of protection of the invention is belonged to.
Embodiment one：
As shown in Figures 1 to 4, in the present embodiment, there is provided a kind of vertical butt welding method of slab, butt welding is specifically provided
Part 110, welding groove is opened up on docking weldment 110, and being welded in groove using CO2 gas shields is carried out welding and form weld seam
Prime coat 130, is welded on weld seam prime coat 130 using vertical gas-electric and welds the remaining groove filling of completion, forms weld cap
Layer 140.Groove is first welded using CO2 gas shielded arc weldings, can in groove and be located at groove bottom formed be difficult to weld
The weld seam prime coat 130 worn, and then ensure the follow-up welding quality using vertical electro-gas welding, two kinds of welding manners are combined to thicker
Docking weldment 110 welded and can not only be reduced operation difficulty, improve welding quality, can also effectively reduce the heat of welding
Input quantity.
Specific operating procedure is as follows：
S10, pre-treatment, groove is opened up by docking weldment 110, wherein, groove is single groove 150, its groove bottom position
In the back side of docking weldment 110, its groove top is located at the front of docking weldment 110, groove is cleared up；
S20, at the back side of docking weldment 110 and it is located at the bottom of groove and is pasted with pad 120, the closure grooves of pad 120
Bottom；
S30, backing welding, are welded in groove using CO2 gas shields and weld 2~3 layers of formation weld seam prime coat 130, weld seam
The thickness of prime coat 130 is 10~15mm；
S40, cosmetic welding, are welded on weld seam prime coat 130 using vertical gas-electric and weld the remaining groove filling of completion, with shape
Into weld cap layer 140；
S50, after welding treatment, remove pad 120, polish the weld seam of groove both sides, until face of weld with dock weldment 110
Flush.
In the present embodiment, single groove 150 is one side double V-groove, the angle of single groove 150 for 30 °~45 °, CO2
Gas shielded arc welding uses the flux-cored wire of a diameter of 1.2mm, model E81T1-K2, vertical electro-gas welding to use a diameter of 1.6mm
Flux-cored wire, the trade mark is DW-SILG or SC-EG3, and the welding current of vertical electro-gas welding is 400-500A, and weldingvoltage is 40-
44V, speed of welding is 4-8cm/min.
Preferably, pad 120 is copper lining or ceramic substrate, and in the present embodiment, pad 120 is ceramic substrate.
Further, pad 120 sets fluted 121 near the side of groove, and the width of groove 121 is more than groove bottom
Gap width.By setting groove 121 on pad 120, weld seam overflow volume and heat conduction space can be provided for welding,
It is effectively prevented commissure and produces bubble, improves the quality of weld seam.Preferably, groove 121 is to be directed away from groove side
Recessed arcuate structure.
Preferably, the bottom gap of single groove 150 is 5-16mm, and the thickness for docking weldment 110 is 32-50mm.
Embodiment two：
As shown in Fig. 5 to 8, in the present embodiment, there is provided a kind of vertical butt welding method of slab, butt welding is specifically provided
Part 210, welding groove is opened up on docking weldment 210, and being welded in groove using CO2 gas shields is carried out welding and form weld seam
Prime coat 230, is welded on weld seam prime coat using vertical gas-electric and welds the remaining groove filling of completion, to form weld cap layer
240.Groove is first welded using CO2 gas shielded arc weldings, can in groove and be located at groove bottom formed be difficult to burn-through
Weld seam prime coat 230, and then ensure the follow-up welding quality using vertical electro-gas welding, two kinds of welding manners are combined to thicker
Docking weldment 210 is welded can not only reduce operation difficulty, improve welding quality, can also effectively reduce the hot defeated of welding
Enter amount.
Specific operating procedure is as follows：
S100, pre-treatment, groove is opened up by docking weldment 210, and groove is double groove 250, and it has close butt welding
The positive front groove 251 of part 210 and the underside groove 252 near docking weldment 210 back side, clear up groove；
S200, stickers lining pad 220, in the bottom stickers lining pad 220 of the front groove 251 of groove, make the front groove 251 of groove
Do not connected with underside groove 252；
S300, backing welding, welding in the underside groove 252 of groove is welded in using CO2 gas shields, until complete of filling
Underside groove 252；
S400, cleaning, the welding slag in cleaning pad 220 and front groove 251；
S500, cosmetic welding, are welded using vertical electro-gas welding to front groove 251, until complete front slope of filling
Mouth 251.
In the present embodiment, pad 220 is the pad of pole shape, bottom gap of its diameter slightly larger than groove.Herein
The bottom of groove refers to that front groove 251 and the junction of underside groove 252, the i.e. bottom of groove are located at the interior of docking weldment 210
Portion.
In the present embodiment, groove is double groove 250, and the bevel angle of front groove 251 is 30 °~45 °, back side slope
The bevel angle of mouth 252 is 40 °~50 °, and CO2 gas shielded arc weldings use the flux-cored wire of a diameter of 1.2mm, and model number is
E81T1-K2, vertical electro-gas welding uses the flux-cored wire of a diameter of 1.6mm, and the trade mark is DW-SILG or SC-EG3, vertical electro-gas welding
Welding current be 400-500A, weldingvoltage is 40-44V, and speed of welding is 4-8cm/min.
Preferably, pad 220 is copper lining or ceramic substrate, and in the present embodiment, pad 220 is copper rod.
More preferred, the bottom gap of double groove 250 is 5-16mm, the depth of underside groove 252 of double groove 250
It is 10-15mm, the thickness for docking weldment 210 is 32-50mm.
Relative to prior art, the present invention has advantages below：
If the 1, prior art is for slab using vertical electro-gas welding, welding operation difficulty is big, and what welding stopped that arc causes connects
Head increases, and welding quality qualification rate declines, and also increases Weld Seam Repairation amount, and this programme employs CO2 first in groove bottom
Gas shielded arc welding, it is to avoid the situation of back side burn-through, the reduction of welding operation difficulty, no matter outward appearance or internal soundness are obtained
Improve；
If the 2, existing slab uses CO2 gas shielded arc weldings, welding efficiency is low, and welding quality relies on the responsibility of operator
The heart and technical ability, unstability increase, and this programme only has sub-fraction using CO2 gas shielded arc weldings, and major part uses vertical gas
Welded, effectively increased efficiency, and reduce the unstability of weldquality；
3rd, for some special steel plates such as E or EH ranks steel, or there are requirements at the higher level for low-temperature flexibility or intensity
Steel plate is welded, if slab directly uses vertical electro-gas welding, the mechanical property of postwelding joint is difficult to reach the requirement of specification, it is necessary to
It is required that the heat input of steel plate and packing material meets the requirements, and this material is required for import, virtually increased material into
This；And this programme part uses CO2 gas shielded arc weldings, partly using vertical electro-gas welding, part heat input is reduced, and favorably
In the low-temperature flexibility of root, the mechanical property of joint is effectively guaranteed.
Know-why of the invention is described above in association with specific embodiment.These descriptions are intended merely to explain of the invention
Principle, and can not by any way be construed to limiting the scope of the invention.Based on explanation herein, the technology of this area
Personnel associate other specific embodiments of the invention by would not require any inventive effort, these modes fall within
Within protection scope of the present invention.
Claims (10)
1. a kind of slab founds butt welding method, it is characterised in that provide docking weldment, and welding is opened up on the docking weldment
With groove, being welded in the groove using CO2 gas shields is carried out welding and forms weld seam prime coat, and institute is welded in using vertical gas-electric
To state welded on weld seam prime coat and complete remaining groove filling.
2. slab according to claim 1 founds butt welding method, it is characterised in that the groove is single groove, its
Groove bottom is located at the back side of the docking weldment, and its groove top is located at the front of the docking weldment.
3. slab according to claim 2 founds butt welding method, it is characterised in that specific step is as follows：
S10, pre-treatment, groove is opened up by the docking weldment, and the groove is cleared up；
S20, backing welding, are welded in the groove using CO2 gas shields and weld 2~3 layers of formation weld seam prime coat, described
The thickness of weld seam prime coat is 10~15mm；
S30, cosmetic welding, are welded using the vertical electro-gas welding part unwelded to the groove, until whole weld seam welding
Complete.
4. slab according to claim 3 founds butt welding method, it is characterised in that in the step S10 and the step
Step S11 is also set up between rapid S20, pad, institute is pasted with the back side of the docking weldment and positioned at the bottom of the groove
State the bottom of the pad closure groove.
5. slab according to claim 4 founds butt welding method, it is characterised in that the pad is near the groove
Side sets fluted, the width of the width more than the gap of the groove bottom of the groove.
6. slab according to claim 3 founds butt welding method, it is characterised in that also set up step after the step S30
Rapid S40, after welding treatment, remove pad, the weld seam of groove both sides are polished, until face of weld and the flush for docking weldment.
7. slab according to claim 1 founds butt welding method, it is characterised in that the groove of the docking weldment is double
Face groove.
8. slab according to claim 7 founds butt welding method, it is characterised in that comprise the following steps that：
S100, pre-treatment, groove is opened up by the docking weldment, and the groove is cleared up；
S200, stickers lining pad, in the bottom stickers lining pad of the front groove of the groove, make the front groove of the groove and back side slope
Mouth is not connected；
S300, backing welding, are welded in the underside groove of the groove using CO2 gas shields and welded, until complete institute of filling
State underside groove；
S400, cleaning, the welding slag in cleaning pad and the front groove；
S500, cosmetic welding, are welded using vertical electro-gas welding to the front groove, until complete front slope of filling
Mouthful.
9. slab according to claim 8 founds butt welding method, it is characterised in that the pad is the lining of pole shape
Pad, bottom gap of its diameter slightly larger than the groove.
10. the vertical butt welding method of slab according to any one of claim 1 to 9, it is characterised in that the vertical gas-electric
The welding current of weldering is 400-500A, and weldingvoltage is 40-44V, and speed of welding is 4-8cm/min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201481.6A CN106862730A (en) | 2017-03-30 | 2017-03-30 | A kind of vertical butt welding method of slab |
| PCT/CN2017/093622 WO2018176696A1 (en) | 2017-03-30 | 2017-07-20 | Vertical butt joint welding method for thick plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201481.6A CN106862730A (en) | 2017-03-30 | 2017-03-30 | A kind of vertical butt welding method of slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106862730A true CN106862730A (en) | 2017-06-20 |
Family
ID=59160493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710201481.6A Pending CN106862730A (en) | 2017-03-30 | 2017-03-30 | A kind of vertical butt welding method of slab |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106862730A (en) |
| WO (1) | WO2018176696A1 (en) |
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| CN107322132A (en) * | 2017-08-28 | 2017-11-07 | 上海外高桥造船有限公司 | A kind of welding method more than 38mm thickness hull plates |
| CN108213663A (en) * | 2018-01-17 | 2018-06-29 | 兰州兰石重型装备股份有限公司 | Big thickness cylinder and the complete penetraction and fusion in welding welding method taken over |
| WO2018176696A1 (en) * | 2017-03-30 | 2018-10-04 | 广船国际有限公司 | Vertical butt joint welding method for thick plates |
| CN108705186A (en) * | 2018-07-20 | 2018-10-26 | 四川汇源钢建装配建筑有限公司 | A kind of method and weldment of 1.6mm welding wires welding broad gap |
| CN108907418A (en) * | 2018-07-20 | 2018-11-30 | 四川汇源钢建装配建筑有限公司 | A kind of broad gap welding method and weldment |
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| WO2018176696A1 (en) * | 2017-03-30 | 2018-10-04 | 广船国际有限公司 | Vertical butt joint welding method for thick plates |
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