NL2028573A - A welding method for a main propulsor base of a deep-water dynamic positioning crude oil cargo transfer vessel - Google Patents
A welding method for a main propulsor base of a deep-water dynamic positioning crude oil cargo transfer vessel Download PDFInfo
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- NL2028573A NL2028573A NL2028573A NL2028573A NL2028573A NL 2028573 A NL2028573 A NL 2028573A NL 2028573 A NL2028573 A NL 2028573A NL 2028573 A NL2028573 A NL 2028573A NL 2028573 A NL2028573 A NL 2028573A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/003—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to controlling of welding distortion
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/025—Connecting cutting edges or the like to tools; Attaching reinforcements to workpieces, e.g. wear-resisting zones to tableware
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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
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
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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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0288—Seam welding; Backing means; Inserts for curved planar seams for welding of tubes to tube plates
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
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- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding method for a main propulsor base of a deep-water dynamic positioning crude oil cargo transfer vessel, which belongs to the ship field. 5 The welding method comprises the following steps: weld between the cylinder and the flange by sequence balanced welding; respectively set the welding paths for the areas to be welded between the panel and the flange, between the web and the cylinder and between the panel and the web, respectively weld between the panel and the outer side of the flange, between the web and the outer side of the cylinder and among the web, 10 the panel and the flange in the sequence of the set welding paths. The welding method of the invention reduces the internal stress generated during the welding process of the main propulsor base to effectively decrease welding deformation, so that the formed structure rigidity and manufacturing accuracy of the welded main propulsor base meet requirements, thereby ensuring the installation accuracy of the main propulsor during 15 the construction process of the deep-water dynamic positioning crude oil cargo transfer vessel.
Description
-1- A WELDING METHOD FOR A MAIN PROPULSOR BASE OF A DEEP-
VESSEL Technical Field The invention relates to the field of ship engineering, in particular to a welding method for a main propulsor base of a deep-water dynamic positioning crude oil cargo transfer vessel.
Background Art Under the background that the international crude oil price remains low and the global offshore oil companies greatly cut the operating costs, CTV (Cargo Transfer Vessel) for reducing FPSO oil unloading costs emerges. The new concept deep-water dynamic positioning crude oil CTV will challenge the traditional existing crude oil transfer ways in the market. Two full-revolving propulsors are required to be installed in the deep-water dynamic positioning crude oil cargo transfer vessel, a single full-revolving propulsor has the propeller diameter of up to 3,500 mm, the weight of 56T and the net height of more than 6,000 mm, the volume and weight are large, and the installation accuracy is high, so the base for the full-revolving propulsors is required to connect the stern structure of the vessel with the main propulsor, so as to realize the installation of the main propulsor. By comparing other structures of the ship, the main propulsor base for the deep-water dynamic positioning crude oil cargo transfer vessel adopts the thick plate structure, the thickness of the flange is 120 mm, and the thickness of the other structures reaches 50 mm, so the conventional welding method can hardly meet the requirements for the structure rigidity and the manufacturing accuracy of the main propulsor base for the deep-water dynamic positioning crude oil cargo transfer vessel.
Contents of the Invention The invention aims to propose a welding method for a main propulsor base of a deep- water dynamic positioning crude oil cargo transfer vessel.
-2- For this purpose, the invention adopts the following technical proposal which includes the following steps: Step S100: arrange a first groove on the outer side of the panel, arrange a second groove on the top of the web, arrange a third groove on the top of the cylinder, and arrange a fourth groove on one side of the web;
Step S200: set the welding parameters for the welding process; Step S300: weld between the third groove of the cylinder and the flange by sequence balanced welding; Step S400: set the welding paths for the areas to be welded between the panel and the flange, between the web and the cylinder and between the panel and the web; Step S500: weld between the first groove of the panel and the outer side of the flange, between the fourth groove of the web and the outer side of the cylinder and among the second groove of the web, the panel and the flange in the sequence of the welding paths set in Step S400;
Step S600: repeat Step S500 until all panels and webs are welded.
Preferably, the first groove, the second groove, the third groove and the fourth groove are all asymmetric V-shaped grooves.
Preferably, Step S300 includes: Step S301: divide the joint part between the cylinder and the flange into a first seam, a second seam, a third seam and a fourth seam which are equal in length and symmetrically distributed, wherein two ends of the first seam are respectively connected with one end of the third seam and one end of the fourth seam, and two ends of the second seam are respectively connected with the other end of the third seam and the other end of the fourth seam;
Step S302: weld the backing layer and the filling layer counterclockwise in sequence on the inner side of the first seam; Step S303: perform back gouging on the outer side of the first seam; Step S304: weld the backing layer and the filling layer counterclockwise in sequence on the outer side of the first seam;
Step S305: weld the capping layer counterclockwise on the inner side of the first seam; Step S306: weld the capping layer counterclockwise on the outer side of the first seam; Step S307: repeat steps S302-S307 for the second seam, the third seam and the fourth seam to complete the welding between the flange and the cylinder.
-3- Preferably, Step S400 includes: Step S401: divide the area to be welded between the panel and the flange counterclockwise in sequence into a first panel welding area, a fourth panel welding area, a sixth panel welding area, a second panel welding area, a fifth panel welding area and a third panel welding area symmetrically arranged, Step S402: divide the area to be welded between the web and the cylinder counterclockwise in sequence into a first web welding area, a fourth web welding area, a sixth web welding area, a second web welding area, a fifth web welding area and a third web welding area symmetrically arranged; Step S403: divide the area to be welded between the panel and the web counterclockwise in sequence into a first T-shaped beam welding area, a fourth T- shaped beam welding area, a sixth T-shaped beam welding area, a second T-shaped beam welding area, a fifth T-shaped beam welding area and a third T-shaped beam welding area symmetrically arranged, Step S404: set the welding path as follows: the first panel welding area - the second panel welding area - the third panel welding area - the fourth panel welding area - the fifth panel welding area - the sixth panel welding area - the first web welding area - the second web welding area - the third web welding area - the fourth web welding area - the fifth web welding area - the sixth web panel welding area - the first T-shaped beam welding area - the second T-shaped beam welding area - the third T-shaped beam welding area - the fourth T-shaped beam welding area - the fifth T-shaped beam welding area - the sixth T-shaped beam welding area.
Preferably, Step S500 includes the following steps for the welding between the first groove of the panel and the outer side of the flange: Step S511: weld the backing layer and the filling layer on one side between the first groove of the panel and the outer side of the flange; Step S512: perform back gouging on the other side between the first groove of the panel and the outer side of the flange; Step S513: weld the backing layer and the filling layer on the other side between the first groove of the panel and the outer side of the flange; Step S514: weld the capping layer on one side between the first groove of the panel and the outer side of the flange;
-4- Step S515: weld the capping layer on the other side between the first groove of the panel and the outer side of the flange; Preferably, Step S500 includes the following steps for the welding between the fourth groove of the web and the outer side of the cylinder: Step S521: divide the joint part between the cylinder and the web into a fifth seam and a sixth seam which are equal in length, wherein one end of the sixth seam is connected with the panel, and the other end of the sixth seam is connected with one end of the fifth seam; Step S522: weld the backing layer and the filling layer on one side of the fifth seam in sequence; Step S523: perform back gouging on the other side of the fifth seam, Step S524: weld the backing layer and the filling layer on the other side of the fifth seam; Step S525: weld the capping layer on one side of the fifth seam; Step S526: weld the capping layer on the other side of the fifth seam; Step S527: repeat Steps S522-S526 for the sixth seam to complete the welding between the cylinder and the web.
Preferably, Step S500 includes the following steps for the welding among the second groove of the web, the panel and the flange: Step S531: weld the backing layer and the filling layer on one side among the second groove of the web, the panel and the flange; Step S532: perform back gouging on the other side among the second groove of the web, the panel and the flange; Step S533: weld the backing layer and the filling layer in sequence on the other side among the second groove of the web, the panel and the flange; Step S534: weld the capping layer on one side among the second groove of the web, the panel and the flange; Step S535: weld the capping layer on the other side among the second groove of the web, the panel and the flange; Preferably, welding between the third groove of the cylinder and the flange, between the first groove of the panel and the outer side of the flange and among the second groove of the web, the panel and the flange in Step S200 is FCAW double-sided welding. The welding parameters are as follows:
-5- Backing layer: welding current: 180-200A, welding voltage: 26-30V, gas flow: 15-20 L/min; Filling layer: welding current: 200-230A, welding voltage: 28-32V, gas flow: 15-20 L/min; Capping layer: welding current: 200-230A, welding voltage: 28-32V, gas flow: 15-20 L/min. Preferably, welding between the fourth groove on the web and the outer side of the cylinder in Step S200 is FCAW double-sided welding. The welding parameters are as follows: Backing layer: welding current: 160-190A, welding voltage: 25-39V, gas flow: 15-20 L/min; Filling layer: welding current: 180-200A, welding voltage: 26-30V, gas flow: 15-20 L/min; Capping layer: welding current: 180-200A, welding voltage: 26-31V, gas flow: 15-20 L/min. Preferably, the size of each weld leg is 6-10 mm. The invention has the following beneficial effects: the welding method of the invention reduces the internal stress generated during the welding process of the main propulsor base to effectively decrease the welding deformation, so that the formed structure rigidity and manufacturing accuracy of the welded main propulsor base meet requirements, thereby ensuring the installation accuracy of the main propulsor during the construction process of the deep-water dynamic positioning crude oil cargo transfer vessel. The welding method of the invention has passed the weldability test and the evaluation on the welding process, facilitates the operation of production personnel in combination with the sequence balanced welding and the backstep welding, improves the welding efficiency, avoids the waste of welding materials, reduces the production cost and shortens the construction cycle of the deep-water dynamic positioning crude oil cargo transfer vessel.
Drawing Description The drawings provide further explanation for the invention, but the contents in the drawings do not constitute any limitation to the invention.
-6- Fig. 1 is a section view for the main propulsor base of the deep-water dynamic positioning crude oil cargo transfer vessel in the invention; Fig. 2(a) is a partial enlarged view for the position I of Fig. 1; Fig. 2(b) is a section enlarged view for the position II of Fig. 1; Fig. 2(c) is a partial enlarged view for the position III of Fig. 1; Fig. 2(d) is a section view for the position IV of Fig. 1; Fig. 3(a) is a schematic diagram for the welding sequence between the inner side of the cylinder and the flange; Fig. 3(b) is a schematic diagram for the welding sequence between the outer side of the cylinder and the flange; Fig. 4(a) is a schematic diagram for the area to be welded between the panel and the flange; Fig. 4(b) is a schematic diagram for the area to be welded between the web and the cylinder; Fig. 4(c) is a schematic diagram for the area to be welded between the web and the panel. Fig. 51s a schematic diagram for the division of the joint part between the cylinder and the web of the invention; Fig. 6 is a structure diagram for the main propulsor base of the deep-water dynamic positioning crude oil cargo transfer vessel. Embodiments The technical proposal of the invention is further explained as follows according to the drawings and the embodiments.
The welding method for the main propulsor base of the deep-water dynamic positioning crude oil cargo transfer vessel in the embodiment includes the following steps: Step S100: arrange a first groove on the outer side of the panel, arrange a second groove on the top of the web, arrange a third groove on the top of the cylinder, and arrange a fourth groove on one side of the web; Step S200: set the welding parameters for the welding process; Step S300: weld between the third groove of the cylinder and the flange by sequence balanced welding;
-7- Step S400: set the welding paths for the areas to be welded between the panel and the flange, between the web and the cylinder and between the panel and the web; Step S500: weld between the first groove of the panel and the outer side of the flange, between the fourth groove of the web and the outer side of the cylinder and among the second groove of the web, the panel and the flange in the sequence of the welding paths set in Step S400; Step S600: repeat Step S500 until all panels and webs are welded.
The welding method of the invention reduces the internal stress generated during the welding process of the main propulsor base to effectively decrease welding deformation, so that the formed structure rigidity and manufacturing accuracy of the welded main propulsor base meet requirements, thereby ensuring the installation accuracy of the main propulsor during the construction process of the deep-water dynamic positioning crude oil cargo transfer vessel. The welding method of the invention has passed the weldability test and the evaluation on the welding process, facilitates the operation of production personnel in combination with the sequence balanced welding and the backstep welding, improves the welding efficiency, avoids the waste of welding materials, reduces the production cost and shortens the construction cycle of the deep-water dynamic positioning crude oil cargo transfer vessel.
The method of the embodiment is used to realize the welding based forming of the main propulsor base for the deep-water dynamic positioning crude oil cargo transfer vessel. The structure of the main propulsor base for the deep-water dynamic positioning crude oil cargo transfer vessel is shown in Fig. 1 and Fig. 6, comprising a flange 23, a cylinder 21 and multiple T-shaped beams 22, wherein the cylinder 21 is installed at the upper end of the flange 23, the T-shaped beams 22 are evenly distributed on the outside of the cylinder, the T-shaped beam 22 comprises a web 221 and a panel 222, one side of the web 221 is connected with the outer side of the cylinder 21, the bottom of the web 221 is connected with the upper side of the flange 23 and the panel 222, and one side of the panel 222 is connected with the outer side of the flange 23.
Preferably, the first groove, the second groove, the third groove and the fourth groove are all asymmetric V-shaped grooves according to Fig. 2(a) to Fig. 2(d).
-8- The workpieces to be welded are all of thick plate structure, in which the panel is 50 mm thick, the web is 35 mm thick, the cylinder is 35 mm thick, and the flange is 120 mm thick, so the first groove, the second groove, the third groove and the fourth groove are all asymmetric V-shaped grooves to ensure the welding effect between the panel and the flange, between the web and the flange, between the cylinder and the flange, and between the web and the panel, the welding arc can go deep into the root of the seam, and the weld can connect the gap in the seam to improve the strength of the welding position, so that the formed structure rigidity and manufacturing accuracy of the welded main propulsor base meet requirements.
Wherein, the first groove angle of the first groove is set to 40-45 degrees, the second groove angle is set to 40-45 degrees, and the root gap is set to 0-3 mm; the first groove angle of the second groove is set to 40-45 degrees, the second groove angle is set to 45 degrees, and the root gap is set to 0-3 mm; the first groove angle of the third groove is set to 40-45 degrees, the second groove angle is set to 45 degrees, and the root gap is setto 0-3 mm; the first groove angle of the fourth groove is set to 40-45 degrees, the second groove angle is set to 45 degrees, and the root gap is set to 0-3 mm. Preferably, Step S300 includes the following steps: Step S301: according to Fig. 3, divide the joint part between the cylinder and the flange into a first seam 1, a second seam 2, a third seam 3 and a fourth seam 4 which are equal in length and symmetrically distributed, wherein the two ends of the first seam 1 are respectively connected with one end of the third seam 3 and one end of the fourth seam 4, and the two ends of the second seam are respectively connected with the other end of the third seam 3 and the other end of the fourth seam 4; Step S302: weld the backing layer and the filling layer counterclockwise on the inner side of the first seam 1 in sequence; Step S303: perform back gouging on the outer side of the first seam 1; Step S304: weld the backing layer and the filling layer counterclockwise on the outer side of the first seam 1 in sequence; Step S305: weld the capping layer counterclockwise on the inner side of the first seam 1; Step S306: weld the capping layer counterclockwise on the outer side of the first seam 1;
-9-
Step S307: repeat steps S302-S307 for the second seam 2, the third seam 3 and the fourth seam 4 to complete the welding between the flange and the cylinder.
Welding between the flange and the cylinder is sequence balanced welding.
The welding position is divided according to the actual size of the cylinder on the main propulsor base.
As the section of the cylinder is circular, in order to disperse the weld heat and facilitate the positioning and fixation of cylinder, two symmetrical seams are welded each time to reduce the deformation caused by the internal stress during welding.
Each seam is welded according to Steps S302 to S306. The angular deformation of the structure is effectively controlled by double-sided cross welding of the same seam, thus guaranteeing the accurate installation of the main propulsor.
Preferably, Step S400 includes the following steps:
Step S401: according to Fig. 4, divide the area to be welded between the panel and the flange counterclockwise in sequence into a first panel welding area Al, a fourth panel welding area A4, a sixth panel welding area A6, a second panel welding area A2, a fifth panel welding area AS and a third panel welding area A3 symmetrically arranged; Step S402: divide the area to be welded between the web and the cylinder counterclockwise in sequence into a first web welding area B1, a fourth web welding area B4, a sixth web welding area B6, a second web welding area B2, a fifth web welding area BS and a third web welding area B3 symmetrically arranged,
Step S403: divide the area to be welded between the panel and the web counterclockwise in sequence into a first T-shaped beam welding area C1, a fourth T- shaped beam welding area C4, a sixth T-shaped beam welding area C6, a second T- shaped beam welding area C2, a fifth T-shaped beam welding area C5 and a third T- shaped beam welding area C3 symmetrically arranged;
Step S404: set the welding path as follows: the first panel welding area A1 - the second panel welding area A2- the third panel welding area A3 - the fourth panel welding area A4 - the fifth panel welding area A5 - the sixth panel welding area A6 - the first web welding area B1 - the second web welding area B2 - the third web welding area B3 - the fourth web welding area B4 - the fifth web welding area BS - the sixth web panel welding area B6 - the first T-shaped beam welding area C1 - the second T-shaped beam welding area C2 - the third T-shaped beam welding area C3 - the fourth T- shaped beam welding area C4 - the fifth T-shaped beam welding area C5 - the sixth T- shaped beam welding area C6.
-10- Multiple T-shaped beams are arranged on the outer side of the main propulsor base for the deep-water dynamic positioning crude oil cargo transfer vessel and are welded by the web and the panel, so that the whole main propulsor base is in gear shape.
T- shaped beams are used for connecting with a T-shaped connecting structure in the stern structure of the deep-water dynamic positioning crude oil cargo transfer vessel.
Therefore, by setting the welding path, welding each panel with the flange in sequence in Step S404, then welding each web with the cylinder and finally welding each panel with each web, the weld heat is dispersed effectively to reduce the deformation caused by the internal stress during welding, thereby ensuring the installation accuracy of the T-shaped beam and the stern structure for the deep-water dynamic positioning crude oil cargo transfer vessel.
Preferably, Step S500 includes the following steps for the welding between the first groove of the panel and the outer side of the flange: Step S511: weld the backing layer and the filling layer on one side between the first groove of the panel and the outer side of the flange; Step S512: perform back gouging on the other side between the first groove of the panel and the outer side of the flange; Step S513: weld the backing layer and the filling layer on the other side between the first groove of the panel and the outer side of the flange; Step S514: weld the capping layer on one side between the first groove of the panel and the outer side of the flange; Step S515: weld the capping layer on the other side between the first groove of the panel and the outer side of the flange; Thus, for the welding between one side of the panel and the flange, the method of double-sided cross welding is used on the same seam to effectively control the angular deformation between the panel and the flange and ensure the installation accuracy of the panel and the flange, thereby ensuring the installation accuracy of the T-shaped beam and the stern structure for the deep-water dynamic positioning crude oil cargo transfer vessel.
Preferably, Step S500 includes the following steps for the welding between the fourth groove of the web and the outer side of the cylinder according to Fig. 5: Step S521: divide the joint part between the cylinder and the web into a fifth seam 5 and a sixth seam 6 which are equal in length, wherein one end of the sixth seam 6 is
-11- connected with the panel, and the other end of the sixth seam is connected with one end of the fifth seam 5; Step S522: weld the backing layer and the filling layer on one side of the fifth seam 5 in sequence; Step S523: perform back gouging on the other side of the fifth seam 5; Step S524: weld the backing layer and the filling layer on the other side of the fifth seam 5; Step S525: weld the capping layer on one side of the fifth seam 5; Step S526: weld the capping layer on the other side of the fifth seam 5; Step S527: repeat Steps S522-S526 for the sixth seam 6 to complete the welding between the cylinder and the web.
The seam between the cylinder and the web is long according to the actual size of the cylinder and the web on the main propulsor base.
If the seam is welded by one step, the heat of the weld will be high due to too long welding time to finally cause the thermal expansion and deformation of the weld.
Therefore, in the backstep welding method of the embodiment, the joint part between the cylinder and the web is divided into the fifth seam 5 and the sixth seam 6 equal in length according to Step S521, the fifth seam 5 away from the cylinder is first welded, and then the sixth seam 6 close to the cylinder is welded, so that the part being welded keeps away from the part already welded, reducing the temperature difference between the fifth seam 5 and the sixth seam 6, and avoiding the thermal expansion and deformation of the weld.
Moreover, for welding between the cylinder and the web, the angular deformation between the cylinder and the web is effectively controlled by double-sided cross welding of the same seam to ensure the installation accuracy between the cylinder and the web, thus ensuring the installation accuracy of the T-shaped beams and the stern structure for the deep-water dynamic positioning crude oil cargo transfer vessel.
Preferably, Step S500 includes the following steps for the welding among the second groove of the web, the panel and the flange: Step S531: weld the backing layer and the filling layer on one side among the second groove of the web, the panel and the flange; Step S532: perform back gouging on the other side among the second groove of the web, the panel and the flange;
-12- Step S533: weld the backing layer and the filling layer on the other side among the second groove of the web, the panel and the flange in sequence; Step S534: weld the capping layer on one side among the second groove of the web, the panel and the flange; Step S535: weld the capping layer on the other side among the second groove of the web, the panel and the flange.
For welding among the flange, the web and the panel, the angular deformation among the flange, the web and the panel is also effectively controlled by double-sided cross welding of the same seam to ensure the installation accuracy among the flange, the web and the panel, thus ensuring the installation accuracy of the T-shaped beams and the stern structure for the deep-water dynamic positioning crude oil cargo transfer vessel.
Preferably, welding between the third groove of the cylinder and the flange, between the first groove of the panel and the outer side of the flange and among the second groove of the web, the panel and the flange in Step S200 is FCAW double-sided welding.
The welding parameters are as follows: Backing layer: welding current: 180-200A, welding voltage: 26-30V, gas flow: 15-20 L/min; Filling layer: welding current: 200-230A, welding voltage: 28-32V, gas flow: 15-20 L/min; Capping layer: welding current: 200-230A, welding voltage: 28-32V, gas flow: 15-20 L/min.
Preferably, welding between the fourth groove on the web and the outer side of the cylinder in Step S200 is FCAW double-sided welding.
The welding parameters are as follows: Backing layer: welding current: 160-190A, welding voltage: 25-39V, gas flow: 15-20 L/min; Filling layer: welding current: 180-200A, welding voltage: 26-30V, gas flow: 15-20 L/min; Capping layer: welding current: 180-200A, welding voltage: 26-31V, gas flow: 15-20 L/min.
By setting the welding parameters, defects such as thermal cracks or lack of penetration can be prevented.
-13-
Preferably, the size of each weld leg is 6-10 mm.
By setting the size of the weld leg to 6-10 mm, the weld filling amount is guaranteed in the welding process, and welding defects such as lack of penetration are avoided.
The technical principle of the invention is described above in combination with the embodiments.
These descriptions are intended only to explain the principle of the invention and shall not be construed as limitation to the scope of protection of the invention in any way.
Based on the explanation herein, the technicians in this field can associate with other embodiments of the invention without creative efforts, which will fall within the scope of protection of the invention.
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CN116748725A (en) * | 2023-05-26 | 2023-09-15 | 南通中远海运船务工程有限公司 | Processing and mounting method for offshore wind power operation and maintenance stern propeller base |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150098524A (en) * | 2014-02-20 | 2015-08-28 | 주식회사 지인테크 | Receptacle for azimuth thruster |
KR20160115323A (en) * | 2015-03-26 | 2016-10-06 | 주식회사 지인테크 | Receptacle for azimuth thruster |
CN105081520B (en) * | 2015-06-11 | 2017-09-26 | 上海船舶工艺研究所 | The vertical docking FCAW single face welding and double face shaping processes of thin plate in full-automatic 9%Ni steel |
CN108723707B (en) * | 2018-04-28 | 2020-04-17 | 哈尔滨锅炉厂有限责任公司 | Manufacturing method of skirt foundation ring plate |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101648310B (en) * | 2008-08-15 | 2011-09-14 | 中国海洋石油总公司 | Method for welding circular casings with large-thickness casing walls |
CN102887220B (en) * | 2012-09-11 | 2014-12-03 | 武昌船舶重工集团有限公司 | Electric thruster pedestal and welding method thereof |
CN110014241B (en) * | 2019-04-29 | 2021-03-16 | 中电建武汉铁塔有限公司 | Welding process for power transmission steel pipe tower flange |
CN210306478U (en) * | 2019-08-05 | 2020-04-14 | 无锡瑞风船用动力系统有限公司 | Welding tool for impeller of full-rotation propeller |
CN110508961A (en) * | 2019-08-06 | 2019-11-29 | 湖北电力天源钢管塔有限公司 | Power transmission steel pipe tower flange welding technique |
-
2020
- 2020-12-31 CN CN202011628270.9A patent/CN112658513B/en active Active
-
2021
- 2021-06-29 NL NL2028573A patent/NL2028573B1/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20150098524A (en) * | 2014-02-20 | 2015-08-28 | 주식회사 지인테크 | Receptacle for azimuth thruster |
KR20160115323A (en) * | 2015-03-26 | 2016-10-06 | 주식회사 지인테크 | Receptacle for azimuth thruster |
CN105081520B (en) * | 2015-06-11 | 2017-09-26 | 上海船舶工艺研究所 | The vertical docking FCAW single face welding and double face shaping processes of thin plate in full-automatic 9%Ni steel |
CN108723707B (en) * | 2018-04-28 | 2020-04-17 | 哈尔滨锅炉厂有限责任公司 | Manufacturing method of skirt foundation ring plate |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116748725A (en) * | 2023-05-26 | 2023-09-15 | 南通中远海运船务工程有限公司 | Processing and mounting method for offshore wind power operation and maintenance stern propeller base |
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