CN108422064A - A kind of offshore drilling platform spud leg rack welding method - Google Patents
A kind of offshore drilling platform spud leg rack welding method Download PDFInfo
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- CN108422064A CN108422064A CN201810246067.1A CN201810246067A CN108422064A CN 108422064 A CN108422064 A CN 108422064A CN 201810246067 A CN201810246067 A CN 201810246067A CN 108422064 A CN108422064 A CN 108422064A
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- welding
- welding machine
- demagnetization
- machine
- drilling platform
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- 238000003466 welding Methods 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 230000005347 demagnetization Effects 0.000 claims abstract description 50
- 239000005357 flat glass Substances 0.000 claims abstract description 23
- 238000004804 winding Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003313 weakening effect Effects 0.000 abstract description 2
- 238000011017 operating method Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to welding technology fields, disclose a kind of offshore drilling platform spud leg rack welding method, the method includes being located in window glass plate on semi-circular tube；The groove welding formed between window glass plate and semi-circular tube using welding machine, other welding machine welding on conducting magnetic component is used while to the groove welding, wherein, welding machine to the groove welding is weld seam welding machine, welding machine to the conducting magnetic component welding is demagnetization welding machine, the weld seam welding machine is opposite with the electric polarity of demagnetization welding machine, the welding method of the present invention synchronizes by physics demagnetization and two aspect of reasonable Arrangement welding sequence according to actual conditions and carries out weakening arc blow phenomenon, operating method is simple, it is easy to accomplish.
Description
Technical field
The present invention relates to welding technology fields, and in particular to a kind of offshore drilling platform spud leg rack welding method.
Background technology
Steel easily magnetizes in cutting, machining, magnetic handling and welding process, magnetic small weld bond, reluctantly can be with
Welding, but it is magnetic bigger than normal when, the intensity of magnetization is very big when especially large-scale steel pipe component is installed, and in the welding process, will produce magnetic
Blow phenomenon, arc blow are a great problems in weld job, and less serious case, influence electric arc stablizes burning, causes the root of weld
Strip is lack of penetration, and interlayer stomata makes appearance of weld degenerate, severe one, after the starting the arc, welding rod because groove band magnetic be tightly sticked on groove,
Welding arc is in " surrounding injection " shape, and electric arc is unable to normal ignition in groove, cannot form molten bath, the molten drop of fusing from groove to
Outer splashing directly influences the protection of the metal transfer and liquid metal in welding process, and the welding to increase steel pipe lacks
Sunken has occurred, and makes weld job that can not be normally carried out.
Especially at sea in the welding process of drilling platform leg rack, semi-circular tube is carried on the rack, completes phase
The window glass plate be located on the semi-circular tube on rack after the welding of the rack mutually docked, realize between window glass plate and semi-circular tube
Welding, at this point, the magnetic field after being magnetized comes from the window glass plate after being magnetized, rack and semi-circular tube, magnetic field intersection is multiple
Miscellaneous, arc blow phenomenon is more serious in the magnetic field of this intersection complexity, and welding is more difficult, therefore, is welded to stablize
Journey changes general quality of weld joint, and the demagnetization of the offshore drilling platform spud leg rack being magnetized before welding is particularly important.
Invention content
It is welded after being magnetized the technical problem to be solved by the present invention is to offshore drilling platform spud leg rack in the prior art tired
It is difficult.In order to solve the above technical problems, the invention discloses a kind of offshore drilling platform spud leg rack welding method, the method packet
It includes：
Window glass plate be located on semi-circular tube；
The gap welding formed between window glass plate and semi-circular tube using welding machine is used while to the gap welding
Other welding machine welding on conducting magnetic component, wherein the welding machine to the gap welding is weld seam welding machine, to the magnetic conduction structure
The welding machine of part welding is demagnetization welding machine, and the weld seam welding machine is opposite with the electric polarity of demagnetization welding machine.Preferably, described
Weld seam welding machine uses straight polarity direct current, the demagnetization welding machine to use DC reverse connection.
Further, the demagnetization welding machine further includes before to the conducting magnetic component welding, by the handle of the demagnetization welding machine
Line is wrapped on the window glass plate and rack.
Further, the demagnetization welding machine line is wound follows left hand rule or the right-hand rule.
Preferably, the weld seam welding machine and demagnetization welding machine are connected from different DC power supplies respectively.
Preferably, the welding current of the demagnetization welding machine it is higher by 20% than the welding current of the weld seam welding machine~
30%.
Further, be formed with two gaps between the semi-circular tube on the window glass plate and rack, including the first gap and
Second gap.
Further, the weld seam welding machine includes the first welding machine and the second welding machine, first welding machine and the second welding machine
Electric polarity is identical.
Preferably, the first welding machine pair the first gap welding, the second welding machine pair the second gap welding.
Further, first welding machine and the second welding are respectively to first gap and the welding simultaneously of the second gap.
Further, demagnetization welding machine uses the parameter more than weld seam welding machine parameter 20%~30% prior to weld seam welding machine 5-10
Second starts the welding on conducting magnetic component, and weld seam welding machine starts the starting the arc welding in respective gap after its welding process stabilization.
Further, when demagnetization welding machine stops welding because of irresistible factor (such as change welding rod, have a power failure), weld seam welding machine
Also it should stop welding at the first time, wait for demagnetization welding machine again using the parameter more than weld seam welding machine parameter 20%~30% prior to weldering
Seam welder starts the welding on conducting magnetic component in 5-10 seconds, and weld seam welding machine starts in respective gap after its welding process stabilization
Starting the arc welding.
Using above-mentioned technical proposal, offshore drilling platform spud leg rack welding method of the present invention has following beneficial
Effect：
1) offshore drilling platform spud leg rack welding method of the present invention can be good at weakening the sea being magnetized
The arc blow phenomenon that drilling platform leg rack is generated in welding, improves the feasibility of welding；
2) the weld seam welding machine in offshore drilling platform spud leg rack welding method of the present invention by being welded with gap
Opposite polarity demagnetization welding machine welding on conducting magnetic component, and gap welding is carried out at the same time with conducting magnetic component welding, makes its generation
Magnetic field with the magnetic field that is generated when the welder of gap on the contrary, realizing disappearing in welding process by this reversed polarity demagnetization method
Magnetic, meanwhile, demagnetization welding machine is wrapped in line in window weldering and rack, it is suitable by physics demagnetization and rational arrangement welding
Sequence weakens arc blow phenomenon.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram of offshore drilling platform spud leg rack of the present invention；
Fig. 2 is the flow chart of offshore drilling platform spud leg rack welding method of the present invention；
In figure, 1- racks, 2- semi-circular tubes, 3- window glass plates.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
" one embodiment " or " embodiment " referred to herein refers to that may be included at least one realization method of the present invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term "upper", "top", "bottom", etc. instructions
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
To indicate or implying relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can be expressed or what is implied includes one or more this feature.Moreover, term " first ", " second "
Etc. being for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that use in this way
Data can be interchanged in the appropriate case, so that the embodiment of the present invention described herein can be in addition to illustrating or retouching herein
Sequence other than those of stating is implemented.
Embodiment：
In the prior art, steel easily magnetizes in cutting, machining, magnetic handling and welding process, comes for welded bands
Puzzlement will carry out demagnetization, the especially welding of drilling platform leg rack at sea to the steel pipe after magnetization before welding
In the process, semi-circular tube 2 is carried on the rack 1, and after the welding between the rack 1 for completing to be mutually butted, the window glass plate 3 is detained
It is located on the semi-circular tube 2 on rack 1, realizes the welding between long backplate 3 and semi-circular tube 2, at this point, the magnetic field after being magnetized comes from
Window glass plate 3, rack 1 after being magnetized and semi-circular tube 2, magnetic field intersection is complicated, the magnetic biasing in the magnetic field of this intersection complexity
It is more serious to blow phenomenon, welding is more difficult, therefore, for stabilized welding process, changes general quality of weld joint, has been magnetized
The demagnetization of offshore drilling platform spud leg rack before welding is particularly important.For ease of description, in the present embodiment, it will be above-mentioned
The magnetic field for the generation arc blow phenomenon that is magnetized is denoted as remanent magnetic field.
To solve problems of the prior art, the present invention provides a kind of offshore drilling platform spud leg rack welding sides
Method, specifically, refering to fig. 1 and Fig. 2, the method includes：
S10, window glass plate 3 be located on semi-circular tube 2；
Specifically, the semi-circular tube 2 is formed on rack 1, and when the window glass plate 3 be located on the semi-circular tube 2, institute
It states and forms gap between window glass plate 3 and semi-circular tube 2, specifically, the gap includes the first gap and the second gap, described first
Gap and the second gap are respectively formed at the cooperation of the semi-circular tube coordinated with 3 both ends of the window glass plate.
S20, the gap welding formed between window glass plate 3 and semi-circular tube 2 using welding machine, to the same of the gap welding
The other welding machine weldings on conducting magnetic component of Shi Caiyong, wherein the welding machine to the gap welding is weld seam welding machine, to described
The welding machine of conducting magnetic component welding is demagnetization welding machine, and the weld seam welding machine is opposite with the electric polarity of demagnetization welding machine.As preferred
, the conducting magnetic component be steel plate, it is to be understood that the conducting magnetic component not with the rack 1, semi-circular tube 2 and window
Any one contact of plate 3.Further, further include before implementation steps S20, step S11, line is twined by the demagnetization welding machine
It is wound on the window glass plate 3 and rack 1, preferably, the cross-sectional area line is 352Mm~502The flexible welding of mm
The coil of conducting wire composition.
Specifically, line winding is followed left hand rule or the right-hand rule by the demagnetization welding machine, further, in winding institute
State demagnetization welding machine before line, by means of magnetometer, (magnetometer (Magnetic, M-Sensor) is also earth magnetism, magnetic strength device, can use
In test magnetic field intensity and direction, the principle in the orientation of positioning device, magnetometer is similar with compass principle, can measure and work as
Preceding equipment and the angle on the four direction of all directions.) determine the size and Orientation of remanent magnetic field；Specifically, it is fixed to follow left hand
Then or the right-hand rule is set according to actual conditions, i.e., the direction in the magnetic field generated according to weld seam welding machine sets the handle of demagnetization welding machine
Line winding direction, the action direction in magnetic field and the action direction of remanent magnetic field for so that it is generated are on the contrary, to realize that demagnetization welding machine produces
Raw magnetic field can weaken the purpose in the magnetic field of weld seam welding machine generation.
Further, it is backing welding to the process of weld seam welding by the weld seam welding machine, preferably, in this implementation
In example, backing welding is implemented using carbon-dioxide arc welding, it is to be understood that backing welding is carried out to gap in the weld seam welding machine
While, demagnetization welding machine welding on conducting magnetic component, by the welding simultaneously of opposite polarity welding machine, the magnetic for making the two generate
On the contrary, to using this reversed polarity demagnetization method realize welding process in demagnetization, meanwhile, by described above by demagnetization
Welding machine is wrapped in line on window glass plate and rack, realizes physics demagnetization, and then pass through physics demagnetization and rational arrangement weldering
The reversed polarity demagnetization for connecing sequence weakens arc blow phenomenon.
Further, after demagnetization terminates, when in order to smoothly reduce magnetic flux, it should electric current is gradually reduced in 1min,
Until zero, then cut off the power.
Further, in the present embodiment, the weld seam welding machine is two, specifically includes the first welding machine and the second welding machine,
First welding machine and the electric polarity of the second welding are identical.Preferably, first welding machine is to first gap welding,
Second welding machine is to second gap welding, and the welding in first gap and the second gap is carried out at the same time.
Further, the weld seam welding machine and the demagnetization welding machine are connected from different DC power supplies respectively, as preferred
, during the welding process, the weld seam welding machine straight polarity direct current, the demagnetization welding machine DC reverse connection.
Further, the welding current of the demagnetization welding machine is higher by 20%~30% than the welding current of the weld seam welding machine.
Preferably, in the present embodiment, the welding current of the weld seam welding machine is 80~100A.
Further, demagnetization welding machine uses the parameter more than weld seam welding machine parameter 20%~30% prior to weld seam welding machine 5-10
Second starts the welding on conducting magnetic component, and weld seam welding machine starts the starting the arc welding in respective gap after its welding process stabilization.
Further, when demagnetization welding machine stops welding because of irresistible factor (such as change welding rod, have a power failure), weld seam welding machine
Also it should stop welding at the first time, wait for demagnetization welding machine again using the parameter more than weld seam welding machine parameter 20%~30% prior to weldering
Seam welder starts the welding on conducting magnetic component in 5-10 seconds, and weld seam welding machine starts in respective gap after its welding process stabilization
Starting the arc welding.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of offshore drilling platform spud leg rack welding method, which is characterized in that the method includes,
Window glass plate be located on semi-circular tube；
The gap welding formed between window glass plate and semi-circular tube using welding machine, using in addition while to the gap welding
One welding machine welding on conducting magnetic component, wherein the welding machine to the gap welding is weld seam welding machine, is applied to the conducting magnetic component
The welding machine of weldering is demagnetization welding machine, and the weld seam welding machine is opposite with the electric polarity of demagnetization welding machine.
2. offshore drilling platform spud leg rack welding method according to claim 1, which is characterized in that the demagnetization welding machine
Further include before to the conducting magnetic component welding, by the demagnetization welding machine line is wrapped on the window glass plate and rack.
3. offshore drilling platform spud leg rack welding method according to claim 2, which is characterized in that the demagnetization welding machine
Line winding follow left hand rule or the right-hand rule.
4. offshore drilling platform spud leg rack welding method according to claim 1, which is characterized in that the weld seam welding machine
It is connected respectively from different DC power supplies with demagnetization welding machine.
5. offshore drilling platform spud leg rack welding method according to claim 1 or 4, which is characterized in that the demagnetization
The welding current of welding machine is higher by 20%~30% than the welding current of the weld seam welding machine.
6. offshore drilling platform spud leg rack welding method according to claim 5, which is characterized in that the weld seam welding machine
Using straight polarity direct current, the demagnetization welding machine uses DC reverse connection.
7. offshore drilling platform spud leg rack welding method according to claim 1, which is characterized in that the window glass plate and
Two gaps, including the first gap and the second gap are formed between semi-circular tube on rack.
8. offshore drilling platform spud leg rack welding method according to claim 5, which is characterized in that the weld seam welding machine
Including the first welding machine and the second welding machine, the electric polarity of first welding machine and the second welding machine is identical.
9. offshore drilling platform spud leg rack welding method according to claim 8, which is characterized in that first welding machine
To the first gap welding, the second welding machine pair the second gap welding.
10. offshore drilling platform spud leg rack welding method according to claim 9, which is characterized in that first weldering
Machine and the second welding are respectively to first gap and the welding simultaneously of the second gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246067.1A CN108422064A (en) | 2018-03-23 | 2018-03-23 | A kind of offshore drilling platform spud leg rack welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246067.1A CN108422064A (en) | 2018-03-23 | 2018-03-23 | A kind of offshore drilling platform spud leg rack welding method |
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| CN108422064A true CN108422064A (en) | 2018-08-21 |
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| CN201810246067.1A Pending CN108422064A (en) | 2018-03-23 | 2018-03-23 | A kind of offshore drilling platform spud leg rack welding method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148009A (en) * | 2007-06-15 | 2008-03-26 | 中国铝业股份有限公司 | Method for welding metal under strong magnetic field circumstance |
| CN202344113U (en) * | 2011-11-17 | 2012-07-25 | 山东华源锅炉有限公司 | Device for local demagnetization |
| CN102699494A (en) * | 2012-07-04 | 2012-10-03 | 上海振华重工集团(南通)传动机械有限公司 | Overall heating automatic welding process of spud leg main coil of offshore drilling platform and special tool of overall heating automatic welding process |
| CN104874931A (en) * | 2015-04-21 | 2015-09-02 | 南通蓝岛海洋工程有限公司 | Drilling platform pile leg manufacturing technology |
| CN105312728A (en) * | 2014-06-09 | 2016-02-10 | 山东电力建设第一工程公司 | Device for eliminating influence of continuous high-intensity magnetic field on welding operation |
-
2018
- 2018-03-23 CN CN201810246067.1A patent/CN108422064A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148009A (en) * | 2007-06-15 | 2008-03-26 | 中国铝业股份有限公司 | Method for welding metal under strong magnetic field circumstance |
| CN202344113U (en) * | 2011-11-17 | 2012-07-25 | 山东华源锅炉有限公司 | Device for local demagnetization |
| CN102699494A (en) * | 2012-07-04 | 2012-10-03 | 上海振华重工集团(南通)传动机械有限公司 | Overall heating automatic welding process of spud leg main coil of offshore drilling platform and special tool of overall heating automatic welding process |
| CN105312728A (en) * | 2014-06-09 | 2016-02-10 | 山东电力建设第一工程公司 | Device for eliminating influence of continuous high-intensity magnetic field on welding operation |
| CN104874931A (en) * | 2015-04-21 | 2015-09-02 | 南通蓝岛海洋工程有限公司 | Drilling platform pile leg manufacturing technology |
Non-Patent Citations (1)
| Title |
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| 杨磊: "浅谈长输天然"浅谈长输天然气管道绕线组法消磁方法气管道绕线组法消磁方法", 《金属加工（热加工）》, no. 2015, 30 June 2015 (2015-06-30), pages 47 - 48 * |
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