CN110508954A - A kind of wind power foundation thin plate submerged-arc welding process - Google Patents
A kind of wind power foundation thin plate submerged-arc welding process Download PDFInfo
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- CN110508954A CN110508954A CN201910758824.8A CN201910758824A CN110508954A CN 110508954 A CN110508954 A CN 110508954A CN 201910758824 A CN201910758824 A CN 201910758824A CN 110508954 A CN110508954 A CN 110508954A
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- welding
- thin plate
- arc welding
- submerged
- arc
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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
- 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
Abstract
The invention discloses a kind of wind power foundation thin plate submerged-arc welding process, comprising the following steps: preceding groove processing, assembly weldering, control temperature, welding, appearance detection and non-destructive testing are welded in blanking processing.The invention has the advantages that taking multilayer multiple tracks zigzag weld, refining weld grain by the technology improves weld seam crystallization tissue, improves the mechanical property and low-temperature flexibility of weld seam and its heat affected area；Thin plate is fixed using frock clamp in blanking treatment process, prevents to deform caused by uneven, temperature gradient of heat etc. in blanking process, keeps structure and groove size etc. precisely controlled；It is assembled using medicine core gas shielded arc welding FCAW, matches carbon dioxide gas arc welding welding wire E501T-1L, this welding wire is consistent with base material performance, requirement needed for capable of reaching welding procedure；Using buried arc welding method, production efficiency is higher, while also ensuring weldquality requirement, 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 thin plate submerged-arc welding process.
Background technique
With national rapid development of economy, some areas short of electricity amount is increasing, and the excellent land area of wind-resources is
Capital construction, and still having a large amount of wind speed not is that very high but more stable wind speed low wind speed area can be built, and resolves low wind
The production and transportation problem of fast tower, can bring the very big market space.The welding of sheet metal weld seam has following features and difficult point:
1, since lamella thickness is smaller, it is more difficult to the welding impact flexibility of guarantee；2, since lamella thickness is smaller, easily there is dimension overproof
Situation needs strict control blanking deformation, groove size；3, component thickness is small, in assembly weldering and submerged arc welding process, is easy
Generate gas hole defect caused by welding；4, during girth weld, easily cause appearance of weld bad and metal overflow.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of wind power foundation thin plate submerged-arc welding process.
The technical solution adopted by the present invention is that:
A kind of wind power foundation thin plate submerged-arc welding process, comprising the following steps:
A, blanking is handled: thin plate is sucked with magnetic iron and places on the table, recalls sheet blanking program and leads into digital controlling plasma
On cutting machine, numerical control plasma cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length direction is missed
Difference requires 0 ~ 1.5mm, plate wide difference≤1.5mm, difference≤2mm of diagonal line；
B, groove processing before weldering: using sanding machine polishing sheet edges, form root face preferably with groove, and clear up near groove
Impurity within the scope of 20mm, the internal groove width of the thin plate are 10 ± 1mm, and bevel angle is 53.2 ± 5 °, and groove depth is
10±1mm；
C, assembly weldering: assembling positioning is carried out between thin plate and thin plate using medicine core gas shield welding FCAW, determines one every 100mm
Assembly solder joint is reinforced, and 50mm long is welded in every section of assembly, assembles the gap of setting 1mm in root at weldering；
D, control temperature: plate sheet welding does not need to preheat under normal circumstances, and when encountering, temperature is lower than 10 DEG C or humidity is greater than 90%
Weather conditions when, then need to preheat: be heated in groove two sides 100mm range flame, when heating, temperature need to be controlled 80
~ 120 DEG C, interlayer temperature is controlled at 80-200 DEG C；
E, it welds: thin plate and thin plate being subjected to SAW welding, first submerged arc welding is carried out in inner barrel, inside is welded and is completed, directly
To capping, then again on the outside of cylinder using carbon arc air gouging back chipping after, with sanding machine to the carburized layer on back chipping rear cylinder body surface with
Molten slag is polished, until after assembly face of weld exposes metallic luster, then outside submerged arc welding is carried out, cover welding is completed
Afterwards, welding terminates, and is then covered weld seam with asbestos cloth, the generation of pre- Anti-cracking, and coverage area is 150mm around welded seam area
It is interior；
F, appearance detects: before quality inspection progress, welder needs first to carry out self-test, guarantees that weld appearance situation is intact, weld seam table
Face must not have slag inclusion, crackle, undercut and gas hole defect；
G, non-destructive testing: after the detection of VT appearance is qualified, UT detection is done after 48 hours, T-shaped stitches (longitudinal seam, girth joint junction)
Add and surveys RT, MT.
Here, the concrete operation step of the medicine core gas shield welding FCAW in step c are as follows: using CO 2 gas-shielded
Flux-cored wire E501T-1L, gage of wire Φ 1.2, electric current 200-240A, voltage 29-32V, speed of welding 24-30cm/min are welded,
Protective gas CO2Flow 15-25L/min.
In the preferred scheme, the welding procedure of the SAW welding in step e are as follows: welding wire F5A4-H10Mn2, solder flux
SJ101, gage of wire Φ 4.0, solder flux specification 8-40 mesh, electric current 550-650A, voltage 29-35V, speed of welding 26-32m/h,
2h is kept the temperature at 300-350 DEG C after drying before solder flux weldering.
In further preferred scheme, thin plate is fixed using frock clamp in blanking treatment process in step a, with
Prevent thin plate stress deformation.
The frock clamp in the above scheme includes two arc round steel pipes, is set among two arc round steel pipes
It is equipped with the straight round steel pipe as oxygen-propane gas passage, is provided with A-frame below two arc round steel pipes, it is described
Frock clamp use process is as follows: heater is put be placed in cylinder side first, nozzle and cylinder section to be heated are away from 100-
Ethylene Oxide gas cylinder is connect with the suction nozzle that heater is loaded into appendix, opens valve, light gas at nozzle, so by 150mm
It is rotated afterwards with remote control control turning rolls, cylinder is allowed to rotate with turning rolls, flame is evenly heated heating zone, the phase
Between with infrared radiation thermometer to thermometric at heating, stop heating after temperature reaches 80-120 degree.
The beneficial effects of the present invention are: 1, take multilayer multiple tracks zigzag weld, pass through the technology refine weld grain improve
Weld seam crystallization tissue improves the mechanical property and low-temperature flexibility of weld seam and its heat affected area；2, it is used in blanking treatment process
Frock clamp fixes thin plate, prevents to deform caused by uneven, temperature gradient of heat etc. in blanking process, makes structure and slope
Mouth size etc. is precisely controlled；3, it is assembled using medicine core gas shielded arc welding FCAW, matches carbon dioxide gas arc welding
Welding wire E501T-1L, this welding wire are consistent with base material performance, requirement needed for capable of reaching welding procedure；4, submerged-arc welding is used
Method is connect, production efficiency is higher, while also ensuring weldquality requirement, can preferably guarantee welding quality and improve effect
Rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of frock clamp used in blanking processing step in the present invention.
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 thin plate submerged-arc welding process, comprising the following steps:
A, blanking is handled: thin plate is sucked with magnetic iron and places on the table, recalls sheet blanking program and leads into digital controlling plasma
On cutting machine, numerical control plasma cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length direction is missed
Difference requires 0 ~ 1.5mm, plate wide difference≤1.5mm, difference≤2mm of diagonal line, will be thin using frock clamp in blanking treatment process
Plate is fixed, to prevent thin plate stress deformation, as shown in Figure 1, frock clamp includes two arc round steel pipes 1, two curved circulars
The straight round steel pipe 2 as oxygen-propane gas passage is provided among steel pipe 1, the lower section of two arc round steel pipes 1 is provided with triangle
Bracket 3 is fixed thin plate using frock clamp in blanking treatment process, prevents that heat is uneven in blanking process, temperature is terraced
It is deformed caused by degree etc., keeps structure and groove size etc. precisely controlled；
B, groove processing before weldering: using sanding machine polishing sheet edges, form root face preferably with groove, and clear up near groove
Impurity within the scope of 20mm；
C, assembly weldering: assembling positioning is carried out between thin plate and thin plate using medicine core gas shield welding FCAW, determines one every 100mm
Assembly solder joint is reinforced, and 50mm long is welded in every section of assembly, assembles the gap of setting 1mm in root at weldering；
D, control temperature: plate sheet welding does not need to preheat under normal circumstances, and when encountering, temperature is lower than 10 DEG C or humidity is greater than 90%
Weather conditions when, then need to preheat: be heated in groove two sides 100mm range flame, when heating, temperature need to be controlled 80
~ 120 DEG C, interlayer temperature is controlled at 80-200 DEG C；
E, it welds: thin plate and thin plate being subjected to SAW welding, first submerged arc welding is carried out in inner barrel, inside is welded and is completed, directly
To capping, using the method for submerged arc welding, production efficiency is higher, while also ensuring weldquality requirement, can preferably protect
It demonstrate,proves welding quality and improves efficiency, after then using carbon arc air gouging back chipping on the outside of cylinder again, with sanding machine to back chipping rear cylinder body
The carburized layer on surface is polished with molten slag, until after assembly face of weld exposes metallic luster, then outside submerged arc welding is carried out,
After the completion of cover welding, welding terminates, and is then covered weld seam with asbestos cloth, and the generation of pre- Anti-cracking, coverage area is weld seam
Around region in 150mm；
F, appearance detects: before quality inspection progress, welder needs first to carry out self-test, guarantees that weld appearance situation is intact, weld seam table
Face must not have slag inclusion, crackle, undercut and gas hole defect；
G, non-destructive testing: after the detection of VT appearance is qualified, UT detection is done after 48 hours, T-shaped stitches (longitudinal seam, girth joint junction)
Add and surveys RT, MT.
Wherein, the concrete operation step of the medicine core gas shield welding FCAW in step c are as follows: using CO 2 gas-shielded
Flux-cored wire E501T-1L, gage of wire Φ 1.2, electric current 200-240A, voltage 29-32V, speed of welding 24-30cm/min are welded,
Protective gas CO2Flow 15-25L/min is assembled using medicine core gas shielded arc welding FCAW, and apolegamy carbon dioxide gas is protected
Welding wire E501T-1L is protected, this welding wire is consistent with base material performance, requirement needed for capable of reaching welding procedure；In step e
The welding procedure of the SAW welding are as follows: welding wire F5A4-H10Mn2, solder flux SJ101, gage of wire Φ 4.0, solder flux specification 8-40
Mesh, electric current 550-650A, voltage 29-35V, speed of welding 26-32m/h are kept the temperature at 300-350 DEG C after drying before solder flux weldering
2h；The internal groove width of thin plate is 10 ± 1mm, and bevel angle is 53.2 ± 5 °, and groove depth is 10 ± 1mm.
Present invention tool takes multilayer multiple tracks zigzag weld, and refining weld grain by the technology improves weld seam crystallization tissue,
Improve the mechanical property and low-temperature flexibility of weld seam and its heat affected area.
Claims (6)
1. a kind of wind power foundation thin plate submerged-arc welding process, which comprises the following steps:
A, blanking is handled: thin plate is sucked with magnetic iron and places on the table, recalls sheet blanking program and leads into digital controlling plasma
On cutting machine, numerical control plasma cutting machine carries out blanking operation according to program, and cylinder cut lengths deviation radical length direction is missed
Difference requires 0 ~ 1.5mm, plate wide difference≤1.5mm, difference≤2mm of diagonal line；
B, groove processing before weldering: using sanding machine polishing sheet edges, form root face preferably with groove, and clear up near groove
Impurity within the scope of 20mm；
C, assembly weldering: assembling positioning is carried out between thin plate and thin plate using medicine core gas shield welding FCAW, determines one every 100mm
Assembly solder joint is reinforced, and 50mm long is welded in every section of assembly, assembles the gap of setting 1mm in root at weldering；
D, control temperature: plate sheet welding does not need to preheat under normal circumstances, and when encountering, temperature is lower than 10 DEG C or humidity is greater than 90%
Weather conditions when, then need to preheat: be heated in groove two sides 100mm range flame, when heating, temperature need to be controlled 80
~ 120 DEG C, interlayer temperature is controlled at 80-200 DEG C；
E, it welds: thin plate and thin plate being subjected to SAW welding, first submerged arc welding is carried out in inner barrel, inside is welded and is completed, directly
To capping, then again on the outside of cylinder using carbon arc air gouging back chipping after, with sanding machine to the carburized layer on back chipping rear cylinder body surface with
Molten slag is polished, until after assembly face of weld exposes metallic luster, then outside submerged arc welding is carried out, cover welding is completed
Afterwards, welding terminates, and is then covered weld seam with asbestos cloth, the generation of pre- Anti-cracking, and coverage area is 150mm around welded seam area
It is interior；
F, appearance detects: before quality inspection progress, welder needs first to carry out self-test, guarantees that weld appearance situation is intact, weld seam table
Face must not have slag inclusion, crackle, undercut and gas hole defect；
G, non-destructive testing: after the detection of VT appearance is qualified, UT detection is done after 48 hours, T-shaped stitches (longitudinal seam, girth joint junction)
Add and surveys RT, MT.
2. a kind of wind power foundation thin plate submerged-arc welding process according to claim 1, which is characterized in that the institute in step c
State the concrete operation step of medicine core gas shield welding FCAW are as follows: use carbon dioxide gas arc welding flux-cored wire E501T-1L, welding wire
Diameter of phi 1.2, electric current 200-240A, voltage 29-32V, speed of welding 24-30cm/min, protective gas CO2Flow 15-25L/
min。
3. a kind of wind power foundation thin plate submerged-arc welding process according to claim 1, which is characterized in that the institute in step e
State the welding procedure of SAW welding are as follows: welding wire F5A4-H10Mn2, solder flux SJ101, gage of wire Φ 4.0, solder flux specification 8-40 mesh,
Electric current 550-650A, voltage 29-35V, speed of welding 26-32m/h keep the temperature 2h at 300-350 DEG C after drying before solder flux weldering.
4. a kind of wind power foundation thin plate submerged-arc welding process according to claim 1, which is characterized in that the thin plate it is interior
Groove width is 10 ± 1mm, and bevel angle is 53.2 ± 5 °, and groove depth is 10 ± 1mm.
5. a kind of wind power foundation thin plate submerged-arc welding process according to claim 1, which is characterized in that blanking in step a
Thin plate is fixed using frock clamp in treatment process, to prevent thin plate stress deformation.
6. a kind of wind power foundation thin plate submerged-arc welding process according to claim 5, which is characterized in that the frock clamp
Including two arc round steel pipes, it is provided with the straight round steel pipe as oxygen-propane gas passage among two arc round steel pipes,
A-frame is provided with below two arc round steel pipes.
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| CN201910758824.8A CN110508954A (en) | 2019-08-16 | 2019-08-16 | A kind of wind power foundation thin plate submerged-arc welding process |
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