CN101433999A - Method for controlling welding deformation of flange - Google Patents
Method for controlling welding deformation of flange Download PDFInfo
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- CN101433999A CN101433999A CNA2008102326630A CN200810232663A CN101433999A CN 101433999 A CN101433999 A CN 101433999A CN A2008102326630 A CNA2008102326630 A CN A2008102326630A CN 200810232663 A CN200810232663 A CN 200810232663A CN 101433999 A CN101433999 A CN 101433999A
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- 238000003466 welding Methods 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 19
- 239000002537 cosmetic Substances 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 3
- 230000002335 preservative effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 238000005242 forging Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a method for controlling welding deformation of a flange. The method comprises the following steps: abutting flanges evenly at a connecting end part of multiple cylindrical sections which are connected to form an integral cylinder to correspondingly assemble multiple cylindrical sections with the flanges; combining a pair of combined flanges on two adjacent cylindrical sections with the flanges in opposite directions; when combining, firstly adding a plurality of gaskets between two combined surfaces of each pair of the combined flanges along the peripheral direction, then fastening each pair of the combined flanges through passing through a plurality of technical bolts, arranging the plurality of the gaskets and the plurality of the technical bolts evenly along the outer peripheral direction of the combined flanges; adopting an automatic submerged-arc welding machine to weld the flanges of the cylindrical sections with the flanges and the cylindrical section cylinder; and detaching the plurality of the technical bolts evenly and symmetrically. The method has the advantages of simple technical process and convenient use and operation, and does not need to reprocess the flange again after welding at the same time of ensuring the evenness of the flange within a qualified range.
Description
Technical field
The present invention relates to welding deformation control technology field, especially relate to a kind of method of control flange welding deformation.
Background technology
Wind-power electricity generation is the cleaning green energy resource that country advocates exploitation energetically, and in the manufacturing of wind power equipment, the quality of its tower tube workmanship is directly connected to equipment reliability of operation and security.Because after the flange that tower tube cylindrical shell docks with its end welding was finished, the flatness of flange required high, thereby the control of the welding deformation of flange and tower tube cylindrical shell, be one of CCP that guarantees tower tube workmanship.In actual processing and making process, flange processes by forging forging piece, and tower tube cylindrical shell is formed by roll of steel plate weldering, and flange do not process in same place with tower tube cylindrical shell, after machining separately, it is welded into a whole again.
Because consider equipment configuration and processing cost problem, after flange and tower tube cylindrical shell are welded as a whole, no longer carry out machining, and flange and tower tube cylindrical shell when welding the flatness of flange guarantee by welding procedure.In the existing welding procedure, generally be that the groove with the butt weld of flange and tower tube cylindrical shell is located at inwall, adopt little heat input to weld afterwards again, thereby the distortion of control flange in allowed limits.If the flatness after the flange welding surpasses the error that allows, then adopt the mode of hand lapping, repair, to reach qualified requirement.But when the groove of Large Towers tube cylindrical shell and flange attachment weld was located at outer wall, its Deformation control was then difficult.In addition, require in the technology construction contract to allow to turn in the top flange to be 0.5mm to the maximum, be 1.5mm to the maximum and turn in coupling flange and the flange in the bottom, and all flanges do not allow all to turn up, so control flange turns up and the flatness of flange is a emphasis in welding process.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, a kind of method of control flange welding deformation is provided, its processing step is simple and use easy to operate, when guaranteeing that planeness of flange is in acceptability limit, do not need after having welded flange is reprocessed yet.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method of control flange welding deformation is characterized in that this method may further comprise the steps:
(a) adopt single track multilayer mode that out-seam is welded: the horizontal welding mode is adopted in bottom back welding, and used gage of wire is φ 3.2mm, and welding current is 400～450A, and weldingvoltage is 32～34V, and the speed of travel is 38 ± 3.8cm/min; After the back welding, adopt the horizontal welding mode to carry out outer seam welding again, it welds used gage of wire is φ 4.0mm, and welding current is 470～550A, and weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min;
(b) adopt the two-layer mode of single track that inseam is welded: seam welding adopts horizontal welding or horizontal welding and uphill welding mode to weld in the ground floor, used gage of wire is φ 4.0mm, welding current is 600～650A, and weldingvoltage is 32～34V, and the speed of travel is 35 ± 3.5cm/min; Seam welding adopts horizontal welding or downward welding in the inclined position mode to weld in the second layer, and used gage of wire is φ 4.0mm, and welding current is 600～650A, and weldingvoltage is 30～32V, and the speed of travel is 28 ± 2.8cm/min;
(c) adopt horizontal welding or downward welding in the inclined position mode to weld at the top out-seam, it welds used gage of wire is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～32V, and the speed of travel is 18～28.6cm/min;
Step 4, remove a plurality of service bolts described in the step 2 and should remove symmetrically.
Outer two-layer welding of seam welding time-division of carrying out described in the step (a), the used gage of wire of two-layer outer seam welding is φ 4.0mm, and welding current is 470～550A, and weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min.
3. according to the method for claim 1 or 2 described a kind of control flange welding deformations, it is characterized in that: the two-layer welding of seam welding time-division outside the top described in the step (c), the outer used gage of wire of seam welding of ground floor is φ 4.0mm, welding current is 600～700A, weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min; The outer used gage of wire of seam welding of the second layer is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～30V, and the speed of travel is 20 ± 2.0cm/min; Wherein, the described second layer is at the cosmetic welding that is welded as of top out-seam.
Described cosmetic welding branch twice are carried out.
Being welded as individual layer welding and being cosmetic welding of top out-seam, it welds used gage of wire is φ 4.0mm described in the step (c), and welding current is 600～700A, and weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min.
Whole cylindrical shell described in the step 1 is the tower tube that wind power equipment is used; Before Ifold flange is made up in opposite directions described in the step 2, it is stand-by that earlier a plurality of interlude shell rings that described tower tube is not directly joined with flange adopt the conventional Lincoln weld technology interlude that is welded into a whole, and in pairs the flange and the tower tube cylindrical shell of Ge Jie shell ring about the described whole interlude assembled again; Behind the bolt of dismantle processes described in the step 4,, each shell ring and the described whole interlude that is welded with flange carried out routine assemble and weld and test and preservative treatment by corresponding installation site.
Described pad is painted on the combinatorial surface that sticks on described each Ifold flange.
The diameter of flange described in the step 1 and shell ring all is not less than φ 1500mm; Pad described in the step 2 is that rectangular washer and its quantity of 50mm * 50mm is 16 or 24, and pad puts in the inner edge 10～15mm of flange.
During flange and each shell ring cylindrical shell are assembled described in the step 1, the ovality of described shell ring cylindrical shell is not more than 3mm; The Ifold flange to the flanged shell ring of adjacent two joints described in the step 2 makes up in opposite directions, and after described Ifold flange made up, the groove gap between two combinatorial surface was not more than 2mm.
Described in the step 1 carry out two-layer outer seam welding the time, second layer out-seam is welded as cosmetic welding.
The present invention compared with prior art has the following advantages, not only processing step is simple and use easy to operate, adopt this process that flange and large-size cylinder body are assembled and welded, the flatness that can guarantee flange and does not need after having welded flange is reprocessed in acceptable ranges.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
The structural representation that Fig. 1 requires for top flange flatness of the present invention.
Fig. 2 is the structural representation of coupling flange of the present invention and the requirement of flange in the bottom flatness.
Fig. 3 carries out the structural representation that closes for Ifold flange of the present invention.
Description of reference numerals:
1-flange; 2-pad; 3-service bolt;
4-shell ring.
The specific embodiment
As Fig. 1, Fig. 2 and shown in Figure 3, the method for control flange welding deformation of the present invention may further comprise the steps:
In the present embodiment, the whole cylindrical shell described in this step is the tower tube that wind power equipment is used, and the diameter of described flange 1 is 2955～φ 4000mm, and the diameter of described shell ring 4 is φ 2955～φ 4000mm.Wherein, turn in the top flange and be 0.5mm to the maximum, δ
1=0～1.0mm; Be 1.5mm to the maximum and turn in coupling flange and the flange in the bottom, δ
2=0～1.5mm.
In addition, before flange 1 and each shell ring cylindrical shell are assembled, answer the ovality of scrutiny shell ring in this step, specifically: when flange 1 and each shell ring cylindrical shell were assembled, the ovality of described shell ring cylindrical shell was not more than 3mm.In the assembling process, guarantee that the ovality of shell ring cylindrical shell is not more than 3mm, otherwise must carry out just assembling after the school circle reaches requirement.
Practical combinations is to when dress, because pad 2 has certain weight, thereby pad 2 enters Ifold flange and can fall down very little, do not have the effect of reserving reversible deformation too much again but pad 2 enters Ifold flange.Concrete combination to the dress way is: earlier the flanged shell ring of a joint is placed on (flange face up) on the reference platform, paint afterwards a plurality of pads 2 evenly are bonded at the flange inboard, again another is saved flanged shell ring afterwards and be inverted (flange face down) with it to dress, a plurality of service bolts 3 are worn in reply mutually again, answer symmetry to carry out when tightening service bolt 3.
In the present embodiment, before in this step described Ifold flange being made up in opposite directions, it is stand-by that earlier a plurality of interlude shell rings 4 that described tower tube is not directly joined with flange adopt the conventional Lincoln weld technology interlude that is welded into a whole, and the flange 1 and the tower tube cylindrical shell of each shell ring 4 are assembled up and down with described whole interlude in pairs again.After the flange 1 of described each shell ring 4 assembled with tower tube cylindrical shell, according to the combined method described in this step a pair of Ifold flanges on the flanged shell ring of adjacent two joints are made up in opposite directions again.
At first, between each is to two combinatorial surfaces of Ifold flange along the circumferential direction during a plurality of pad 2 of cushioning, according to the thickness and the diameter of various combination flange, at the circumferential cushioning varying number of Ifold flange combinatorial surface and the pad 2 of thickness; Afterwards, again with 3 pairs of a plurality of service bolts each that Ifold flange is carried out handle is tight, the final reservation reversible deformation that between each is to two combinatorial surfaces of Ifold flange, forms before the welding; When the Ifold flange to adjacent two flanged shell rings made up in opposite directions, after described Ifold flange made up, the groove gap between two combinatorial surface was not more than 2mm.Be noted that: each carries out handle when tight to Ifold flange adopting 3 pairs of a plurality of service bolts, should carry out handle symmetrically and close, and after closing, the out-seam between each service bolt 3 and described Ifold flange is tightly necessary.Actual the diameter that is pasted Ifold flange is big more when the Ifold flange combinatorial surface is pasted pad 2, and the quantity of the pad that pastes 2 is many more, simultaneously, carries out the quantity of the service bolt 3 that closes also many more to described combination.In the present embodiment, pad 2 is 16 or 24 for the rectangular washer of 50mm * 50mm and its quantity, and pad 2 puts in the inner edge 10～15mm of flange 1.Specifically: when the diameter of Ifold flange is φ 4000mm, the thickness=4～6mm of pad that its combinatorial surface is pasted 2, carrying out the quantity of the service bolt 3 that closes to described Ifold flange is 36; When the diameter of Ifold flange is φ 3837mm, the thickness=4～6mm of pad that its combinatorial surface is pasted 2, carrying out the quantity of the service bolt 3 that closes to described Ifold flange is 34; When the diameter of Ifold flange is φ 3457mm, the thickness=4～6mm of pad that its combinatorial surface is pasted 2, carrying out the quantity of the service bolt 3 that closes to described combination is 30; When the diameter of Ifold flange is φ 2955mm, the thickness δ=3～4mm of pad that its combinatorial surface is pasted 2, carrying out the quantity of the service bolt 3 that closes to described combination is 21.
In addition, in this step, when described Ifold flange being made up in opposite directions, do not allow Ifold flange is applied external force to dress.
The first, adopt single track multilayer mode that out-seam is welded: the horizontal welding mode is adopted in bottom back welding, and used gage of wire is φ 3.2mm, and welding current is 400～450A, and weldingvoltage is 32～34V, and the speed of travel is 38 ± 3.8cm/min; After the back welding, adopt the horizontal welding mode to carry out outer seam welding again, it welds used gage of wire is φ 4.0mm, and welding current is 470～550A, and weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min.
In the present embodiment, when carrying out outer seam welding, divide two-layer the welding, and the used gage of wire of two-layer welding is φ 4.0mm, welding current is 470～550A, and weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min.In the actual welding process, when barrel wall was thicker, its second layer out-seam was welded as cosmetic welding, finish this step in cosmetic welding after promptly finish the flange 1 of described flanged shell ring and the welding process between the shell ring cylindrical shell, then enter step 4.
The second, adopt the two-layer mode of single track that inseam is welded: seam welding adopts horizontal welding or horizontal welding and uphill welding mode to weld in the ground floor, used gage of wire is φ 4.0mm, welding current is 600～650A, and weldingvoltage is 32～34V, and the speed of travel is 35 ± 3.5cm/min; Seam welding adopts horizontal welding or downward welding in the inclined position mode to weld in the second layer, and used gage of wire is φ 4.0mm, and welding current is 600～650A, and weldingvoltage is 30～32V, and the speed of travel is 28 ± 2.8cm/min.That is to say that for seam welding in the ground floor, employing horizontal welding or the horizontal welding slightly mode of uphill welding are welded and adopted the single track mode to weld.
Three, adopt horizontal welding or downward welding in the inclined position mode to weld at the top out-seam, it welds used gage of wire is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～32V, and the speed of travel is 18～28.6cm/min.
In this step, during seam welding, divide two-layer the welding outside carry out at the top, the outer used gage of wire of seam welding of ground floor is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min; The outer used gage of wire of seam welding of the second layer is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～30V, and the speed of travel is 20 ± 2.0cm/min; Wherein, the described second layer is at the cosmetic welding that is welded as of top out-seam.In addition, for the cosmetic welding in this step, when the weld width between flange 1 and shell ring cylindrical shell during greater than 20mm, described cosmetic welding branch twice are carried out.Outside carrying out during seam welding, should slightly weld under the state of downward welding in the inclined position in horizontal welding or horizontal welding, forbid to carry out uphill welding.
Actual carrying out in the welding process, when barrel wall is broad, described being welded as the individual layer welding and being cosmetic welding at the top out-seam, it welds used gage of wire is φ 4.0mm, welding current is 600～700A, and weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min.Promptly finish the flange 1 of described flanged shell ring and the welding process between the shell ring cylindrical shell after finishing the cosmetic welding in this step, then enter step 4.
Step 4, remove a plurality of service bolts 3 described in the step 2 and should remove symmetrically.
In the present embodiment, behind the bolt of dismantle processes described in this step 3,, each shell ring 4 and the described whole interlude that is welded with flange 1 carried out routine assembling weld and test and preservative treatment by corresponding installation site.
In sum, do the reservation reversible deformation of flange welding and in welding process, control the important means that welding sequence is the control flange distortion with pad 2.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (10)
1. the method for a control flange welding deformation is characterized in that this method may further comprise the steps:
Step 1, at the equal abutted flange in connection end (1) of the more piece shell ring (4) that connects to form a whole cylindrical shell, respective sets is dressed up the flanged shell ring of more piece, and adjacent two flanged shell rings connect the identical Ifold flange of a pair of specification that docks the end by the two and connect; Attachment weld groove between described flange (1) and each shell ring cylindrical shell is arranged on the outer wall of described shell ring cylindrical shell, and the thickness of described flange (1) is 40～135mm;
Step 2, a pair of Ifold flanges of described adjacent two joints on the flanged shell ring are made up in opposite directions: during combination, first a plurality of pads of cushioning (2) along the circumferential direction between each is to two combinatorial surfaces of Ifold flange, by to wearing a plurality of service bolts (3) that each is tight to the Ifold flange handle, described a plurality of pads (2) and a plurality of service bolt (3) are all evenly laid along the excircle direction of described Ifold flange again; The thickness of described pad (2) is δ=3～6mm;
Step 3, employing automatic submerged-arc welding machine weld with the shell ring cylindrical shell the flange (1) of described flanged shell ring, and its welding process may further comprise the steps:
(a) adopt single track multilayer mode that out-seam is welded: the horizontal welding mode is adopted in bottom back welding, and used gage of wire is φ 3.2mm, and welding current is 400～450A, and weldingvoltage is 32～34V, and the speed of travel is 38 ± 3.8cm/min; After the back welding, adopt the horizontal welding mode to carry out outer seam welding again, it welds used gage of wire is φ 4.0mm, and welding current is 470～550A, and weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min;
(b) adopt the two-layer mode of single track that inseam is welded: seam welding adopts horizontal welding or horizontal welding and uphill welding mode to weld in the ground floor, used gage of wire is φ 4.0mm, welding current is 600～650A, and weldingvoltage is 32～34V, and the speed of travel is 35 ± 3.5cm/min; Seam welding adopts horizontal welding or downward welding in the inclined position mode to weld in the second layer, and used gage of wire is φ 4.0mm, and welding current is 600～650A, and weldingvoltage is 30～32V, and the speed of travel is 28 ± 2.8cm/min;
(c) adopt horizontal welding or downward welding in the inclined position mode to weld at the top out-seam, it welds used gage of wire is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～32V, and the speed of travel is 18～28.6cm/min;
Step 4, remove a plurality of service bolts (3) described in the step 2 and should remove symmetrically.
2. according to the method for the described a kind of control flange welding deformation of claim 1, it is characterized in that: outer two-layer welding of seam welding time-division of the carrying out described in the step (a), the used gage of wire of two-layer outer seam welding is φ 4.0mm, welding current is 470～550A, weldingvoltage is 30～32V, and the speed of travel is 30 ± 3.0cm/min.
3. according to the method for claim 1 or 2 described a kind of control flange welding deformations, it is characterized in that: the two-layer welding of seam welding time-division outside the top described in the step (c), the outer used gage of wire of seam welding of ground floor is φ 4.0mm, welding current is 600～700A, weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min; The outer used gage of wire of seam welding of the second layer is φ 4.0mm, and welding current is 600～700A, and weldingvoltage is 28～30V, and the speed of travel is 20 ± 2.0cm/min; Wherein, the described second layer is at the cosmetic welding that is welded as of top out-seam.
4. according to the method for the described a kind of control flange welding deformation of claim 3, it is characterized in that: described cosmetic welding branch twice are carried out.
5. according to the method for claim 1 or 2 described a kind of control flange welding deformations, it is characterized in that: being welded as the individual layer welding and being cosmetic welding at the top out-seam described in the step (c), it welds used gage of wire is φ 4.0mm, welding current is 600～700A, weldingvoltage is 30～32V, and the speed of travel is 26 ± 2.6cm/min.
6. according to the method for claim 1 or 2 described a kind of control flange welding deformations, it is characterized in that: the whole cylindrical shell described in the step 1 is the tower tube that wind power equipment is used; Before Ifold flange is made up in opposite directions described in the step 2, it is stand-by that earlier a plurality of interlude shell rings (4) that described tower tube is not directly joined with flange adopt the conventional Lincoln weld technology interlude that is welded into a whole, and the flange (1) and the tower tube cylindrical shell of Ge Jie shell ring (4) are assembled up and down with described whole interlude in pairs again; Behind the bolt of dismantle processes described in the step 4 (3), by corresponding installation site, each shell ring (4) that will be welded with flange (1) and described whole interlude carry out routine assembling and weld and test and preservative treatment.
7. according to the method for claim 1 or 2 described a kind of control flange welding deformations, it is characterized in that: described pad (2) is painted on the combinatorial surface that sticks on described each Ifold flange.
8. according to the method for the described a kind of control flange welding deformation of claim 6, it is characterized in that: the diameter of flange described in the step 1 (1) and shell ring (4) all is not less than φ 1500mm; Pad described in the step 2 (2) is 16 or 24 for the rectangular washer of 50mm * 50mm and its quantity, and pad (2) puts in the inner edge 10～15mm of flange (1).
9. according to the method for the described a kind of control flange welding deformation of claim 6, it is characterized in that: during flange (1) and each shell ring cylindrical shell are assembled described in the step 1, the ovality of described shell ring cylindrical shell is not more than 3mm; The Ifold flange to the flanged shell ring of adjacent two joints described in the step 2 makes up in opposite directions, and after described Ifold flange made up, the groove gap between two combinatorial surface was not more than 2mm.
10. according to the method for the described a kind of control flange welding deformation of claim 2, it is characterized in that: described in the step 1 carry out two-layer outer seam welding the time, second layer out-seam is welded as cosmetic welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102326630A CN101433999B (en) | 2008-12-15 | 2008-12-15 | Method for controlling welding deformation of flange |
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|---|---|---|---|
| CN2008102326630A CN101433999B (en) | 2008-12-15 | 2008-12-15 | Method for controlling welding deformation of flange |
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| CN101433999A true CN101433999A (en) | 2009-05-20 |
| CN101433999B CN101433999B (en) | 2010-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102601489A (en) * | 2012-04-12 | 2012-07-25 | 江苏保龙设备制造有限公司 | Method for welding flange of wind driven generator tower |
| CN102615445A (en) * | 2012-04-25 | 2012-08-01 | 常熟市虞华真空设备科技有限公司 | Welding technique for flange and seal head |
| CN102699639A (en) * | 2012-06-29 | 2012-10-03 | 北方重工集团有限公司 | Technique for integrally manufacturing semi-structure of full-face tunneling machine shield |
| CN102974971A (en) * | 2012-11-27 | 2013-03-20 | 江苏康国化工机械制造有限公司 | Hydrogen fluoride rotary furnace body butt welding method |
| CN103008849A (en) * | 2012-12-10 | 2013-04-03 | 哈尔滨电气动力装备有限公司 | Submerged arc surfacing welding method of L-shaped groove of shell flange |
| CN103277261A (en) * | 2013-04-23 | 2013-09-04 | 广东明阳风电产业集团有限公司 | Structure for preventing inner flange joint faces of wind power towers from cracking |
| CN103277260A (en) * | 2013-04-23 | 2013-09-04 | 广东明阳风电产业集团有限公司 | Method for preventing wind power tower outer flange junction surface from cracking |
| CN103753034A (en) * | 2013-12-17 | 2014-04-30 | 青岛武船重工有限公司 | Method for controlling welding deformation of telescopic steering oar base seat barrel |
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| CN105364413A (en) * | 2015-11-06 | 2016-03-02 | 武汉船用机械有限责任公司 | Manufacturing method of cylindrical members |
| CN105904119A (en) * | 2016-04-05 | 2016-08-31 | 福建帆新能源装备制造有限公司 | Flange conicity correction method after welding between tower drum and flange |
| CN109570802A (en) * | 2018-11-26 | 2019-04-05 | 平高集团有限公司 | A kind of welding method and welding platform for preventing flange welding from deforming |
| CN110076505A (en) * | 2019-04-28 | 2019-08-02 | 沈阳透平机械股份有限公司 | A kind of method of controlled level flange angular deformation |
| CN112372231A (en) * | 2020-11-24 | 2021-02-19 | 中冶建工集团重庆钢结构有限公司 | Method for controlling welding deformation of flange plate of pipe truss node |
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2008
- 2008-12-15 CN CN2008102326630A patent/CN101433999B/en not_active Expired - Fee Related
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| CN102601489A (en) * | 2012-04-12 | 2012-07-25 | 江苏保龙设备制造有限公司 | Method for welding flange of wind driven generator tower |
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