CN112296478A - Welding process for large-diameter large-thickness high-strength steel cylinder - Google Patents
Welding process for large-diameter large-thickness high-strength steel cylinder Download PDFInfo
- Publication number
- CN112296478A CN112296478A CN202011151667.3A CN202011151667A CN112296478A CN 112296478 A CN112296478 A CN 112296478A CN 202011151667 A CN202011151667 A CN 202011151667A CN 112296478 A CN112296478 A CN 112296478A
- Authority
- CN
- China
- Prior art keywords
- welding
- thickness
- strength steel
- steel cylinder
- welding process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 239000011324 bead Substances 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
- B23K9/0052—Welding of pipe panels
-
- 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
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
-
- 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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the technical field of steel cylinder welding, and discloses a welding process of a large-diameter, large-thickness and high-strength steel cylinder, which comprises the following steps: cutting the edge of the shell ring to form an inclined groove; forming a cylinder body by at least two cylinder sections, and performing positioning welding along a circular seam; adopting a plurality of welders to arrange the weld seams at equal intervals in the circumferential direction and perform segmented welding along the same direction; the welding process for the large-diameter large-thickness high-strength steel cylinder comprises the steps of welding the welding seams in a segmented mode, arranging a plurality of welders in the circumferential direction of the welding seams at equal intervals and performing welding along the same direction, so that cylinder deformation caused by stress concentration in the welding process is avoided, the structural precision is guaranteed, the flatness and the perpendicularity of the cylinder flange can be effectively guaranteed, and the component precision is guaranteed.
Description
Technical Field
The invention relates to the technical field of steel cylinder welding, in particular to a welding process of a large-diameter, large-thickness and high-strength steel cylinder.
Background
In the process of building a product ship and an ocean platform, a crane is one of important devices on an engineering ship and the ocean platform and is responsible for taking and transporting various equipment materials, the structure of the crane is stressed greatly, the requirement on working precision is high, and the requirement on the precision of the main cylinder structure is relatively strict. In the cylinder construction process, due to the construction sequence, welding heat input, welding shrinkage and other reasons, the cylinder precision is often not up to standard.
Disclosure of Invention
In view of the above, the present invention aims to provide a welding process for a large-diameter, large-thickness and high-strength steel cylinder, so as to solve the technical problem that the cylinder accuracy often does not reach the standard due to the construction sequence, welding heat input, welding shrinkage and other reasons during the cylinder construction process.
In order to solve the technical problem, the invention provides a welding process of a large-diameter large-thickness high-strength steel cylinder, which comprises the following steps of: cutting the edge of the shell ring to form an inclined groove; forming a cylinder body by at least two cylinder sections, and performing positioning welding along a circular seam; adopting a plurality of welders to arrange the weld seams at equal intervals in the circumferential direction and perform segmented welding along the same direction; the welding mode adopts a multilayer welding method, and weld bead joints of adjacent layers are welded in a staggered mode at preset intervals.
Optionally, before welding the weld, the method further comprises: and preheating the welding seam within a preset range, wherein the preheating temperature is determined according to the thickness of the shell ring.
Optionally, the predetermined range is at least 75 mm.
Optionally, the determining the preheating temperature according to the thickness of the shell ring specifically includes: when the thickness of the shell ring is more than 65mm, the range of the preheating temperature is as follows: 130-150 ℃; when the thickness of the shell ring is less than or equal to 65mm, the preheating temperature range is as follows: 65-110 ℃.
Optionally, the predetermined interval is in the range of 30-50 mm.
Optionally, the positioning welding adopts multi-welding-point welding, and the spacing range of the welding points is 200mm and 250 mm.
Optionally, the tack weld has a thickness greater than 1/3 of the thickness of the shell ring, and the tack weld has a weld length greater than 50 mm.
Optionally, the sequence of welding the welding seam is to weld the outer circumferential seam first and then weld the inner circumferential seam.
Optionally, the included angle between the groove side walls on the two sides of the weld is 8-12 degrees, and the groove root gap on the two sides of the weld is 8-35 mm.
Optionally, the groove is an X-shaped groove.
Compared with the prior art, the welding process of the large-diameter large-thickness high-strength steel cylinder has the beneficial effects that:
according to the welding process for the large-diameter large-thickness high-strength steel cylinder, the welding seam is welded in a segmented mode, and even welders are arranged in the circumferential direction of the welding seam at equal intervals and are arranged along the same direction, so that the deformation of the cylinder body caused by stress concentration in the welding process is avoided, the structural precision is guaranteed, the flatness and the perpendicularity of the flange of the cylinder body can be effectively guaranteed, and the component precision is guaranteed.
Drawings
FIG. 1 is a schematic diagram of groove welding in a welding process of a large-diameter large-thickness high-strength steel cylinder according to an embodiment of the invention;
fig. 2 is a schematic sectional welding diagram in the welding process of the large-diameter large-thickness high-strength steel cylinder according to the embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In addition, the following description will be briefly made with reference to the orientation: the following directional or positional relationships, as indicated in the context of "front", "rear", "upper", "lower", "left", "right", etc., with respect to each structural member, are intended to refer to the orientation or positional relationship as shown in the drawings; these positional relationships are merely for convenience and simplicity of description and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation and therefore should not be construed as limiting the invention.
If there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, a welding process for a large-diameter large-thickness high-strength steel cylinder according to a preferred embodiment of the present invention includes the following steps:
s1, cutting the edge of the shell ring to form an inclined groove; specifically, the groove is an X-shaped groove, so that the inner side and the outer side of the shell ring are welded, the deformation of the shell ring is reduced, the root penetration of a workpiece is ensured, welding slag is convenient to clean, and better weld forming is achieved.
S2, forming a cylinder body by at least two cylinder sections, performing positioning welding along a circular seam, and fixing the two cylinder sections in a positioning welding manner to avoid displacement of the two cylinder sections in the welding process;
s3, adopting double welders to arrange the welding seams at equal intervals in the circumferential direction and weld the welding seams in sections along the same direction, specifically, dividing the circumferential welding seams of the cylinder according to 800mm of each section of 600-plus-material, wherein a typical welding sequence (taking four welders as an example for welding at the same time) is shown in figure 2, the four welders are respectively distributed at intervals at the position 3 to weld the welding seams, after the welding is completed, the four welders synchronously move to the position 2 in the same direction to weld the welding seams, and after the welding is completed, the four welders synchronously move to the position 1 in the same direction to weld the welding seams, so that the welding process of the whole circumferential welding seams is completed; the welding mode adopts a multilayer welding method, namely welding is carried out layer by layer in a welding seam, the welding rod with smaller diameter is selected for a backing welding bead of the first layer, the strip conveying method is determined according to the size of a gap, the welding bead joint of the adjacent layers is welded in a staggered mode at preset intervals, and particularly, the range of the preset intervals is 30-50 mm. Thereby avoiding the problem of poor welding position due to the accumulation of welding points of the welding bead joint. Specifically, welding slag and spatter of each welding line of each layer are cleaned by tools such as a slag hammer, a steel wire brush and the like, and the interlayer temperature is controlled below 220 ℃.
The welding process is as continuous as possible, and if the welding process is interrupted for a long time (more than 8H), the welding seam is preheated before welding to remove water vapor and detect whether the welding seam has cracks. Before arc is started again, a transition groove is planed on the welding line with the arc quenching position of about 50-80mm, after polishing and cleaning, arc is started on the welding line with the distance of about 20-30mm from the transition groove, and the overlapped welding line is removed after welding.
In actual operation, after the welding seam is welded for 1/2 lengths, the levelness of the flange surface is measured, if the accuracy requirement is met, the welding of the residual welding seam is continuously completed, after the welding is completed, the outer side of the cylinder body is subjected to carbon planning and back chipping, polishing and brightness are performed, the accuracy is rechecked, and the welding seam is welded according to the welding sequence.
It can be understood that the flatness and the verticality of the circular seam and the roundness of the flange excircle are checked before assembly before the shell ring is welded, and after the design requirements are met, the working environment is detected when the relative humidity is not more than 80% and the wind speed is not more than 2 m/s; otherwise, appropriate measures (such as preheating of the steel plate, baking before groove welding, wind prevention, rain prevention and the like) are adopted for welding.
Before welding the welding seam, the method also comprises the following steps: preheating the welding seam within a preset range, wherein the preheating temperature is determined according to the thickness of the shell ring. The predetermined range is at least 75mm, so that the preheating is sufficient, and the generation of cracks in the welding process is avoided.
The preheating temperature is determined according to the thickness of the shell ring, and the method specifically comprises the following steps: when the thickness of the shell ring is more than 65mm, the range of the preheating temperature is as follows: 130-150 ℃; when the thickness of the shell ring is less than or equal to 65mm, the preheating temperature range is as follows: the temperature is 65-110 ℃, so that the cylinder sections with different thicknesses can be fully preheated, and the quality of welding seams is improved.
The positioning welding adopts multi-welding-point welding and small current welding to avoid cracks, and the distance range of the welding points is 200-250 mm. The thickness of the positioning welding is greater than 1/3 of the thickness of the shell ring, and the welding length of the positioning welding is greater than 50 mm. In other embodiments, for the welding seam with complex structure and larger linear curvature, the tack welding distance should be properly reduced, and the length should be properly increased.
The welding sequence of the welding seams is specifically that the outer circumferential seam is welded firstly, then the inner circumferential seam is welded, so that the workpiece can be completely welded, the shrinkage of the inner diameter of the cylinder section caused by the circumferential welding seams is effectively reduced, the requirement of meeting the set size of the welded inner diameter of the large cylinder section is ensured, and the size deviation of the inner diameter of the cylinder section is effectively controlled.
The included angle between the groove side walls on the two sides of the welding line ranges from 8 degrees to 12 degrees, and the groove root gaps on the two sides of the welding line range from 8mm to 35mm, so that the welding is convenient, and the welding quality is favorably improved.
Example 1: welding of 40mm thick EH36 diameter 3.6 meter crane cylinder
(1) And removing rust, oil stain, cutting slag, oxide skin, moisture and the like in the 30mm range at the two sides of the groove and the bevel face before welding.
(2) The welding seams of the tack welding and the temporary spot welding are smoothly transited with the base material, the length of the tack welding is 40-60mm, and the distance is 200-250 mm. The tack weld thickness is no less than 1/3 of the barrel thickness.
And (3) preheating the welding seam area within 200mm by using a heating plate before welding, wherein the preheating temperature is higher than 100 ℃. And welding after the preheating area meets the temperature requirement.
(3) 2 welders are adopted to weld along the same direction, and the circumferential weld of the cylinder body is divided into 18 sections according to about 600mm of each section. Referring to FIG. 1, a TWE-71Ni welding wire is adopted, the welding current is 180-.
(4) And measuring the levelness of the flange surface after welding 1/2 welding seams, and continuing to finish welding the rest sections if the accuracy requirement is met.
(5) And after the inside is welded, performing carbon planing back chipping on the outer side of the cylinder, polishing to be bright, and performing welding and precision detection on the welding seam according to the similar sequence in the drawing.
To sum up, compared with the prior art, the embodiment of the invention provides a welding process for a large-diameter large-thickness high-strength steel cylinder, which has the beneficial effects that: according to the welding process for the large-diameter large-thickness high-strength steel cylinder, the welding seam is welded in a segmented mode, and even welders are arranged in the circumferential direction of the welding seam at equal intervals and are arranged along the same direction, so that the deformation of the cylinder body caused by stress concentration in the welding process is avoided, the structural precision is guaranteed, the flatness and the perpendicularity of the flange of the cylinder body can be effectively guaranteed, and the component precision is guaranteed.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A welding process for a large-diameter large-thickness high-strength steel cylinder is characterized by comprising the following steps of:
cutting the edge of the shell ring to form an inclined groove;
forming a cylinder body by at least two cylinder sections, and performing positioning welding along a circular seam;
adopting a plurality of welders to arrange the weld seams at equal intervals in the circumferential direction and perform segmented welding along the same direction;
the welding mode adopts a multilayer welding method, and weld bead joints of adjacent layers are welded in a staggered mode at preset intervals.
2. The welding process for the large-diameter large-thickness high-strength steel cylinder according to claim 1, further comprising, before the butt weld welding: and preheating the welding seam within a preset range, wherein the preheating temperature is determined according to the thickness of the shell ring.
3. The welding process for the large-diameter large-thickness high-strength steel cylinder according to claim 2, wherein the predetermined range is at least 75 mm.
4. The welding process of the large-diameter large-thickness high-strength steel cylinder as claimed in claim 2, wherein the step of determining the preheating temperature according to the thickness of the shell ring specifically comprises the following steps: when the thickness of the shell ring is more than 65mm, the range of the preheating temperature is as follows: 130-150 ℃; when the thickness of the shell ring is less than or equal to 65mm, the preheating temperature range is as follows: 65-110 ℃.
5. The welding process for the large-diameter large-thickness high-strength steel cylinder according to claim 1, wherein the predetermined interval is in the range of 30-50 mm.
6. The welding process of the large-diameter large-thickness high-strength steel cylinder as claimed in claim 1, wherein the tack welding adopts multi-spot welding, and the interval range of the plurality of spots is 200-250 mm.
7. The welding process of the large-diameter large-thickness high-strength steel cylinder as claimed in claim 1, wherein the thickness of the tack weld is greater than 1/3 of the thickness of the shell ring, and the welding length of the tack weld is greater than 50 mm.
8. The welding process of the large-diameter large-thickness high-strength steel cylinder as claimed in claim 1, wherein the welding sequence of the welding seam is to weld the outer circular seam first and then weld the inner circular seam.
9. The welding process of the large-diameter large-thickness high-strength steel cylinder as claimed in claim 1, wherein the included angle between the groove side walls on both sides of the weld is in the range of 8 degrees to 12 degrees, and the groove root gap on both sides of the weld is in the range of 8mm to 35 mm.
10. The welding process of the large-diameter large-thickness high-strength steel cylinder according to claim 1, wherein the groove is an X-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011151667.3A CN112296478A (en) | 2020-10-23 | 2020-10-23 | Welding process for large-diameter large-thickness high-strength steel cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011151667.3A CN112296478A (en) | 2020-10-23 | 2020-10-23 | Welding process for large-diameter large-thickness high-strength steel cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112296478A true CN112296478A (en) | 2021-02-02 |
Family
ID=74330342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011151667.3A Pending CN112296478A (en) | 2020-10-23 | 2020-10-23 | Welding process for large-diameter large-thickness high-strength steel cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112296478A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020759A (en) * | 2021-02-26 | 2021-06-25 | 南通振华重型装备制造有限公司 | Construction method for connecting large jacket foundation transition section with finished flange |
| CN113798788A (en) * | 2021-09-01 | 2021-12-17 | 渤海造船厂集团有限公司 | Allowance-free one-step forming method for large-thickness small-curvature high-strength steel cylinder |
| CN116213981A (en) * | 2022-12-08 | 2023-06-06 | 中海福陆重工有限公司 | Construction process of large-diameter offshore wind power flange |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11129068A (en) * | 1997-10-29 | 1999-05-18 | Kawasaki Steel Corp | Circumferential welding for pipe line fixed pipe |
| CN101648310A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Method for welding circular casings with large-thickness casing walls |
| CN104816076A (en) * | 2015-03-27 | 2015-08-05 | 西安石油大学 | Tube-to-tube butt welding technological method of coiled tube |
| CN105252117A (en) * | 2015-11-11 | 2016-01-20 | 江苏中核利柏特股份有限公司 | Manual tungsten-electrode argon arc welding process for nickel alloy process pipeline |
| CN105728893A (en) * | 2014-12-09 | 2016-07-06 | 重庆渝南科技股份有限公司 | Manual arc welding process for pipeline |
| CN109014644A (en) * | 2018-09-30 | 2018-12-18 | 中船黄埔文冲船舶有限公司 | A kind of runner elbow-making method |
| CN111702297A (en) * | 2020-06-13 | 2020-09-25 | 中国化学工程第十一建设有限公司 | Large-diameter steel pipe welding method |
-
2020
- 2020-10-23 CN CN202011151667.3A patent/CN112296478A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11129068A (en) * | 1997-10-29 | 1999-05-18 | Kawasaki Steel Corp | Circumferential welding for pipe line fixed pipe |
| CN101648310A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Method for welding circular casings with large-thickness casing walls |
| CN105728893A (en) * | 2014-12-09 | 2016-07-06 | 重庆渝南科技股份有限公司 | Manual arc welding process for pipeline |
| CN104816076A (en) * | 2015-03-27 | 2015-08-05 | 西安石油大学 | Tube-to-tube butt welding technological method of coiled tube |
| CN105252117A (en) * | 2015-11-11 | 2016-01-20 | 江苏中核利柏特股份有限公司 | Manual tungsten-electrode argon arc welding process for nickel alloy process pipeline |
| CN109014644A (en) * | 2018-09-30 | 2018-12-18 | 中船黄埔文冲船舶有限公司 | A kind of runner elbow-making method |
| CN111702297A (en) * | 2020-06-13 | 2020-09-25 | 中国化学工程第十一建设有限公司 | Large-diameter steel pipe welding method |
Non-Patent Citations (2)
| Title |
|---|
| 李淑华等: "《焊接技术经验》", 30 June 2014 * |
| 闵庆凯等: "《铆工实际操作手册》", 31 July 2007 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020759A (en) * | 2021-02-26 | 2021-06-25 | 南通振华重型装备制造有限公司 | Construction method for connecting large jacket foundation transition section with finished flange |
| CN113798788A (en) * | 2021-09-01 | 2021-12-17 | 渤海造船厂集团有限公司 | Allowance-free one-step forming method for large-thickness small-curvature high-strength steel cylinder |
| CN113798788B (en) * | 2021-09-01 | 2023-07-11 | 渤海造船厂集团有限公司 | One-step forming method for large-thickness small-curvature high-strength steel cylinder without allowance |
| CN116213981A (en) * | 2022-12-08 | 2023-06-06 | 中海福陆重工有限公司 | Construction process of large-diameter offshore wind power flange |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112296478A (en) | Welding process for large-diameter large-thickness high-strength steel cylinder | |
| CN110153534B (en) | Multilayer and multi-path robot welding path planning method and system suitable for welding deformation | |
| CN109604767B (en) | Intelligent welding control system and method for thick plate narrow gap GMA robot | |
| CN100509243C (en) | Installing and soldering technique of inlet, outlet slip ring of large-scale sliding crawler mill barrel | |
| CN110695616B (en) | Steel structure box column processing technology | |
| CN111715986B (en) | Manufacturing method of large-diameter thick-wall flange cylinder | |
| CN103212913A (en) | Fitting up and welding method of major-diameter thin-wall stainless steel bellows | |
| RU2639182C1 (en) | Method of repair of longitudinal pipe weld, applied by laser welding | |
| CN111376270B (en) | Laser vision locating correction method for robot to cut complex workpiece | |
| CN113020759B (en) | Construction method for connecting large jacket foundation transition section with finished flange | |
| CN114669834B (en) | Groove welding method | |
| CN111468896A (en) | Process for replacing flange on wind tower foundation ring | |
| EP2883643B1 (en) | Submerged arc welding method | |
| CN112139690A (en) | Girth welding method adopting P + T and ceramic pad | |
| JP5949539B2 (en) | Electrogas arc welding method | |
| RU2089363C1 (en) | Method of welding of base structures manufactured of steel | |
| JP4331388B2 (en) | Overlay repair welding method | |
| CN114273764B (en) | Butt joint girth weld welding method for high-strength steel plate steel pipe piles | |
| JPH08238587A (en) | Laser welding head | |
| KR102043240B1 (en) | Welding Method using K-type welding shape | |
| RU2637038C1 (en) | Method of pipe laser welding | |
| CN116638176A (en) | Q355B steel plate butt welding method | |
| JP6787800B2 (en) | Single-sided submerged arc welding method | |
| CN205363057U (en) | Be used for high -performance steel welded welding set | |
| CN117984059A (en) | Tailor welding method for main reinforcement assembly of hydraulic support by adopting nano-coated steel plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210202 |
|
| RJ01 | Rejection of invention patent application after publication |