CN110508955A - A kind of wind power foundation slab submerged arc welding new process - Google Patents
A kind of wind power foundation slab submerged arc welding new process Download PDFInfo
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- CN110508955A CN110508955A CN201910758840.7A CN201910758840A CN110508955A CN 110508955 A CN110508955 A CN 110508955A CN 201910758840 A CN201910758840 A CN 201910758840A CN 110508955 A CN110508955 A CN 110508955A
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- welding
- arc welding
- slab
- submerged arc
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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
- B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
- B23K28/02—Combined welding or cutting procedures or apparatus
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a kind of wind power foundation slab submerged arc welding new processes, comprising the following steps: blanking processing, the preceding groove processing of weldering, assembly is welded, temperature control, welded, appearance detects and non-destructive testing.The invention has the advantages that the method for taking " stationary point blanking ", can preferably guarantee blank size；Assembled using solid gas shielded arc welding GMAW, apolegamy -40 DEG C of reinspections of carbon dioxide gas arc welding welding wire ER50-6(warp are qualified), this welding wire is consistent with base material performance, requirement needed for capable of reaching welding procedure；It is combined using F5A4-H10Mn2/SJ101 welding wire solder flux, production efficiency is higher, while also ensuring weldquality requirement；Heating tooling is designed according to tube structure, there is straight round steel pipe connection to make oxygen-propane gas passage among two arc round steel pipes, under have A-frame support, guarantee its stability, prepare gas reservoir before work, ventilation igniting can start to work, and can accomplish uniformly preheating and postweld heat preservation, can preferably guarantee welding quality and improve efficiency.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of wind power foundation slab submerged arc welding new process.
Background technique
With constantly improve for wind power foundation technology, big megawatt of serial tower is come into being, constantly in practice
To application.Such as Huaneng Group great Feng Hai dress 5MW and Three Gorges great Feng gold wind 6.45MW achieves preferable practical function.Big megawatt is
Column wind power foundation compared to common tower for, maximum feature is exactly that plate thickness is larger, is conducive to the stabilization of tower foundation in this way
Performance and security performance.And Weld quality level must meet existing national standards " bearing device non-destructive testing " (NB/
T47013-2015 it) provides, reaches level-one qualification.But thicker steel plate weld seam welding has following features and difficult point: 1, welding
When compared with fusion penetration, the molten wide for being difficult to guarantee weld seam；2, since plank thickness is larger, easily there is dimension overproof situation, need strictly to control
Blanking deformation processed, groove size；3, component thickness is big, assembly weldering and submerged arc welding process in, be easy to produce welding deformation and
Weld crack.
Summary of the invention
Existing difficulties are welded to solve above-mentioned thicker steel plate weld seam, it is thick that the present invention provides a kind of wind power foundations
Plate submerged arc welding new process.
The technical solution adopted by the present invention is that:
A kind of wind power foundation slab submerged arc welding new process, comprising the following steps:
A, blanking is handled: slab is sucked with magnetic iron and places on the table, recalls slab blanking program and leads into digital control flame and cut
On cutting mill, NC flame cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length deflection error is wanted
Ask 0-2mm, plate wide difference≤2mm, difference≤3mm of diagonal line；
B, groove processing before weldering: with sanding machine polishing steel plate edge, form root face preferably with groove, and clear up near groove
Impurity within the scope of 25mm；
C, assembly weldering: assembling positioning is carried out between slab and slab using solid gas shield welding GMAW, determines one every 120mm
Assembly solder joint is reinforced, and 60mm long is welded in every section of assembly, assembles the gap of 0 ~ 1mm of root at weldering；
D, temperature controls: being heated within the scope of the 120mm of groove two sides with Ethylene Oxide even flame, with thermometer pair after the completion of heating
Groove temperature measures, and just can be carried out weld job after temperature is up to standard, by preheating temperature control at 110-160 DEG C, interlayer temperature
Degree control is at 110-200 DEG C；
E, weld: slab and slab are welded, and first carry out submerged arc welding in inner barrel, inside is welded and is completed, until lid
Face is carried out the carburized layer of back chipping rear surface and molten slag with sanding machine after then using carbon arc air gouging back chipping on the outside of cylinder again
Polishing then carries out submerged arc welding until exposing metallic luster again, and after the completion of cover welding, welding terminates, and longitudinal joint will with asbestos
Weld seam covering, after the completion of girth welding, heater is housed on fixed bracket, open turning rolls take two turns to circumferential weld surface into
Row is evenly heated, and keeps the temperature the generation of the pre- Anti-cracking of slow cooling；
F, appearance detects: before quality inspection carries out VT, welder needs first self-test, guarantees that weld appearance situation is intact, face of weld
Must not there are slag inclusion, crackle, undercut and gas hole defect；
G, after VT is qualified, UT detection, T-shaped seam plus survey RT, MT non-destructive testing: are after 48 hours.
Further, the welding procedure of the solid gas shield welding GMAW in step c are as follows: using CO 2 gas-shielded
Solid welding wire ER50-6, gage of wire Φ 1.2, electric current 220-260A, voltage 29-33V, speed of welding 25-35cm/min are welded, is protected
Protect gas CO2, protection air-flow amount 20-25L/min.
Further, the submerged arc welding in step e is Lincoln weld SAW, welding parameter are as follows: welding wire F5A4-
H10Mn2, solder flux SJ101, gage of wire Φ 4.0, solder flux specification 8-40 mesh, electric current 650-750A, voltage 29-36V, welding speed
25-32m/h is spent, dries 300-350 DEG C of heat preservation 2h before solder flux weldering.
Further, the groove docked between the slab is by following conceptual design: internal groove width is 45 ± 1mm, slope
54 ± 5 ° of bicker degree, 45 ± 1mm of depth；Outer groove width is 22 ± 1mm, 60 ± 5 ° of bevel angle, 19 ± 1mm of depth, intermediate
3 ± 1mm of root face.
It further, is 200mm around welded seam area with the longitudinal joint range that asbestos cover in step e.
Further,.
Further, the heating tooling includes two arc round steel pipes, is provided among two arc round steel pipes
Straight round steel pipe as oxygen-propane gas passage is provided with A-frame, the heating below two arc round steel pipes
Tooling use process is as follows: heater is put and is placed in cylinder side, at cylinder hot-zone side 150-200mm to be added,
Ethylene Oxide gas cylinder is connect with the suction nozzle that heater is loaded into appendix, valve is opened, lights Ethylene Oxide, then use remote controler
Control turning rolls is rotated, and allows cylinder to rotate with turning rolls, flame is evenly heated heating zone, during which with infrared survey
Wen Yi stops heating to thermometric at heating after temperature reaches 110-160 degree.
The beneficial effects of the present invention are: the 1, method that takes " stationary point blanking ", can preferably guarantee blank size；2,
It is assembled using solid gas shielded arc welding GMAW, apolegamy -40 DEG C of reinspections of carbon dioxide gas arc welding welding wire ER50-6(warp are closed
Lattice), this welding wire is consistent with base material performance, requirement needed for capable of reaching welding procedure；3, buried arc welding method is used, is adopted
It is combined with F5A4-H10Mn2/SJ101 welding wire solder flux, production efficiency is higher, while also ensuring weldquality requirement；4, it designs
Dedicated heating tooling is made, heating tooling is designed according to tube structure, has straight round steel pipe among two arc round steel pipes
Oxygen-propane gas passage is made in connection, under have A-frame support, guarantee its stability, prepare gas reservoir before working, point of ventilating
Fire can start to work, and can accomplish uniformly preheating and postweld heat preservation, can preferably guarantee welding quality and improve efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for heating tooling.
Wherein: 1, arc round steel pipe, 2, straight round steel pipe, 3, A-frame.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
A kind of wind power foundation slab submerged arc welding new process, comprising the following steps:
A, blanking is handled: slab is sucked with magnetic iron and places on the table, recalls slab blanking program and leads into digital control flame and cut
On cutting mill, NC flame cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length deflection error is wanted
Seek 0-2mm, plate wide difference≤2mm, difference≤3mm of diagonal line are controlled using the technological measure of " stationary point blanking " in this step
Blanking deformation, the concrete operation step of the technological measure of " stationary point blanking " are not cut every 2 meter Liu Yi sections of 50mm, eventually
Gas flame cuttiug, the method for taking " stationary point blanking ", can preferably guarantee blank size；
B, groove processing before weldering: with sanding machine polishing steel plate edge, form root face preferably with groove, and clear up near groove
Impurity within the scope of 25mm；
C, assembly weldering: assembling positioning is carried out between slab and slab using solid gas shield welding GMAW, determines one every 120mm
Assembly solder joint is reinforced, and 60mm long is welded in every section of assembly, assembles the gap of 0 ~ 1mm of root at weldering；
D, temperature controls: being heated within the scope of the 120mm of groove two sides with Ethylene Oxide even flame, with thermometer pair after the completion of heating
Groove temperature measures, and just can be carried out weld job after temperature is up to standard, by preheating temperature control at 110-160 DEG C, interlayer temperature
Degree control is at 110-200 DEG C；
E, weld: slab and slab are welded, and first carry out submerged arc welding in inner barrel, inside is welded and is completed, until lid
Face is carried out the carburized layer of back chipping rear surface and molten slag with sanding machine after then using carbon arc air gouging back chipping on the outside of cylinder again
Polishing then carries out submerged arc welding until exposing metallic luster again, and after the completion of cover welding, welding terminates, and longitudinal joint will with asbestos
Weld seam covering, is 200mm around welded seam area with the longitudinal joint range that asbestos cover, after the completion of girth welding, heater is put
On fixed bracket, as shown in Figure 1, heating tooling includes two arc round steel pipes 1, it is provided among two arc round steel pipes 1
Straight round steel pipe 2 as oxygen-propane gas passage, the lower section of two arc round steel pipes 1 are provided with A-frame 3, open idler wheel
Frame, which takes two turns, is evenly heated circumferential weld surface, keeps the temperature the generation of the pre- Anti-cracking of slow cooling；
F, appearance detects: before quality inspection carries out VT, welder needs first self-test, guarantees that weld appearance situation is intact, face of weld
Must not there are slag inclusion, crackle, undercut and gas hole defect；
G, after VT is qualified, UT detection, T-shaped seam plus survey RT, MT non-destructive testing: are after 48 hours.
Wherein, the welding procedure of the solid gas shield welding GMAW in step c are as follows: real using carbon dioxide gas arc welding
Cored welding wire ER50-6, gage of wire Φ 1.2, electric current 220-260A, voltage 29-33V, speed of welding 25-35cm/min protect gas
Body CO2, protection air-flow amount 20-25L/min are assembled using solid gas shielded arc welding GMAW, and apolegamy carbon dioxide gas is protected
It is qualified to protect -40 DEG C of reinspections of welding wire ER50-6(warp), this welding wire is consistent with base material performance, can reach needed for welding procedure
It is required that；The submerged arc welding in step e is Lincoln weld SAW, welding parameter are as follows: welding wire F5A4-H10Mn2, solder flux
SJ101, gage of wire Φ 4.0, solder flux specification 8-40 mesh, electric current 650-750A, voltage 29-36V, speed of welding 25-32m/h,
300-350 DEG C of heat preservation 2h is dried before solder flux weldering, buried arc welding method is used, using F5A4-H10Mn2/SJ101 welding wire solder flux
Combination, production efficiency is higher, while also ensuring weldquality requirement；The groove docked between slab is by following conceptual design:
Internal groove width be 45 ± 1mm, 54 ± 5 ° of bevel angle, 45 ± 1mm of depth；Outer groove width is 22 ± 1mm, bevel angle 60
± 5 °, depth 19 ± 1mm, intermediate 3 ± 1mm of root face；Blanking change is controlled in step a using the technological measure of " stationary point blanking "
Shape, the concrete operation step of the technological measure of " the stationary point blanking " are not cut every 2 meter Liu Yi sections of 50mm, eventually flame
Cutting.
Dedicated heating tooling is designed and produced in the present invention, heating tooling is designed according to tube structure, two arcs
There is the connection of straight round steel pipe to make oxygen-propane gas passage among round steel pipe, under have A-frame support, guarantee its stability, work
Preceding preparation gas reservoir, ventilation igniting can start to work, and can accomplish uniformly preheating and postweld heat preservation, can preferably guarantee to weld
It connects quality and improves efficiency.
Claims (7)
1. a kind of wind power foundation slab submerged arc welding new process, which comprises the following steps:
A, blanking is handled: slab is sucked with magnetic iron and places on the table, recalls slab blanking program and leads into digital control flame and cut
On cutting mill, NC flame cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length deflection error is wanted
Ask 0-2mm, plate wide difference≤2mm, difference≤3mm of diagonal line；
B, groove processing before weldering: with sanding machine polishing steel plate edge, form root face preferably with groove, and clear up near groove
Impurity within the scope of 25mm；
C, assembly weldering: assembling positioning is carried out between slab and slab using solid gas shield welding GMAW, determines one every 120mm
Assembly solder joint is reinforced, and 60mm long is welded in every section of assembly, assembles the gap of 0 ~ 1mm of root at weldering；
D, temperature controls: being heated within the scope of the 120mm of groove two sides with Ethylene Oxide even flame, with thermometer pair after the completion of heating
Groove temperature measures, and just can be carried out weld job after temperature is up to standard, by preheating temperature control at 110-160 DEG C, interlayer temperature
Degree control is at 110-200 DEG C；
E, weld: slab and slab are welded, and first carry out submerged arc welding in inner barrel, inside is welded and is completed, until lid
Face is carried out the carburized layer of back chipping rear surface and molten slag with sanding machine after then using carbon arc air gouging back chipping on the outside of cylinder again
Polishing then carries out submerged arc welding until exposing metallic luster again, and after the completion of cover welding, welding terminates, and longitudinal joint will with asbestos
Weld seam covering, after the completion of girth welding, heater is housed on fixed bracket, open turning rolls take two turns to circumferential weld surface into
Row is evenly heated, and keeps the temperature the generation of the pre- Anti-cracking of slow cooling；
F, appearance detects: before quality inspection carries out VT, welder needs first self-test, guarantees that weld appearance situation is intact, face of weld
Must not there are slag inclusion, crackle, undercut and gas hole defect；
G, after VT is qualified, UT detection, T-shaped seam plus survey RT, MT non-destructive testing: are after 48 hours.
2. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that in step c
The welding procedure of the solid gas shield welding GMAW are as follows: use carbon dioxide gas arc welding solid welding wire ER50-6, gage of wire
Φ 1.2, electric current 220-260A, voltage 29-33V, speed of welding 25-35cm/min, protective gas CO2, protection air-flow amount 20-
25L/min。
3. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that in step e
The submerged arc welding is Lincoln weld SAW, welding parameter are as follows: welding wire F5A4-H10Mn2, solder flux SJ101, gage of wire Φ
4.0, solder flux specification 8-40 mesh, electric current 650-750A, voltage 29-36V, speed of welding 25-32m/h dry 300- before solder flux weldering
350 DEG C of heat preservation 2h.
4. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that the slab it
Between the groove that docks by following conceptual design: internal groove width is 45 ± 1mm, 54 ± 5 ° of bevel angle, 45 ± 1mm of depth；Outside
Groove width be 22 ± 1mm, 60 ± 5 ° of bevel angle, depth 19 ± 1mm, intermediate 3 ± 1mm of root face.
5. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that used in step e
The longitudinal joint range of asbestos covering is 200mm around welded seam area.
6. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that adopted in step a
Blanking deformation is controlled with the technological measure of " stationary point blanking ", the concrete operation step of the technological measure of " the stationary point blanking " is
It is not cut every 2 meter Liu Yi sections of 50mm, eventually gas flame cuttiug.
7. a kind of wind power foundation slab submerged arc welding new process according to claim 1, which is characterized in that the heater
Dress includes two arc round steel pipes, is provided with the straight round steel as oxygen-propane gas passage among two arc round steel pipes
It manages, is provided with A-frame below two arc round steel pipes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112518243A (en) * | 2020-11-23 | 2021-03-19 | 江苏海力海上风电装备制造有限公司 | Novel manufacturing process of long and narrow thick plate transition section of wind power tower |
| CN114147324A (en) * | 2021-11-10 | 2022-03-08 | 大连船舶重工集团有限公司 | High-efficiency welding method for large perforated flange and thick-wall pipe |
| CN114985881A (en) * | 2022-06-09 | 2022-09-02 | 江苏海力风电设备科技股份有限公司 | Novel CTOD sample preparation process for thick plate welding seam area of wind power single-pile foundation |
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| CN114985881A (en) * | 2022-06-09 | 2022-09-02 | 江苏海力风电设备科技股份有限公司 | Novel CTOD sample preparation process for thick plate welding seam area of wind power single-pile foundation |
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