CN112296494B - Welding flux copper gasket method submerged-arc welding method for jointed boards with different thicknesses - Google Patents
Welding flux copper gasket method submerged-arc welding method for jointed boards with different thicknesses Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title claims abstract description 67
- 230000004907 flux Effects 0.000 title claims abstract description 54
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 45
- 239000010949 copper Substances 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 14
- 239000010959 steel Substances 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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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
- B23K9/18—Submerged-arc welding
-
- 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
- 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
- B23K2101/18—Sheet panels
- B23K2101/185—Tailored blanks
Abstract
The invention relates to the technical field of ship construction, and discloses a welding flux copper gasket method submerged arc welding method of jointed boards with different thicknesses, which comprises the following steps of S1, determining the opening angle of a groove and the height of a truncated edge according to the thickness of a thin plate, and processing the groove on the thin plate and the thick plate; s2, beveling the top end of the groove of the thick plate, wherein the bottom end of the bevel is flush with the top end of the thin plate; s3, arranging the thick plate and the thin plate at an assembly station, and enabling the thick plate and the thin plate to be flush at one side departing from the groove and enabling the truncated edge of the groove to be tightly attached; and S4, centering the center of the groove by the center of the copper gasket, tightly attaching the copper gasket to the back surfaces of the thick plate and the thin plate, and performing submerged arc welding on the groove. The opening angle of the groove and the height of the truncated edge are determined by taking the thickness of the thin plate as a standard, so that the height of the truncated edge can be ensured, and the steel plate is prevented from being burnt through; the top end of the groove of the thick plate is beveled, so that the distribution of surface welding flux and the flowing direction of a molten pool can be improved, the protection of the welding flux on the thick plate and the formation of a welding seam are ensured, and the quality of the welding seam is improved.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a welding flux copper gasket method submerged arc welding method for jointed boards with different thicknesses.
Background
In the design of ship structures and steel structures, the structures usually involve various steel materials with different plate thickness specifications due to the difference of loading conditions in different areas of the structures. For severe areas with complex loading conditions, steel with large thickness is generally adopted to ensure the safety performance of the whole structure; for the area with smaller loading effect, the steel with smaller thickness is generally adopted to reduce the input cost of the steel and control the weight of the structure. Therefore, a large number of different-thickness panel welds inevitably occur during project construction.
The flux copper backing method submerged arc welding (FCB submerged arc welding for short) is a single-side welding double-side forming submerged arc welding technology, a double electrode or a three electrode is adopted for welding in the welding process, a back welding flux and a copper backing are arranged on the back of a welding groove, the back metal of the welding line can be protected, the forming effect of the back of the welding line can be ensured, a surface welding flux spread on the surface of the welding groove can protect the welding arc and the surface metal of the welding line, necessary alloy elements for transition of the welding line metal are provided, the mechanical property of the welding line metal can be improved, and the welding technology can be widely applied to the field of ship construction.
However, when welding the jointed boards with different thicknesses by adopting a flux copper backing method submerged arc welding mode, compared with the welding situation of the jointed boards with the same thickness, the welding surface between the thick board and the thin board is not flush, the thickness of the thin board is smaller, the thick board is suitable for adopting large current and low speed welding, the thin board is suitable for adopting small current and high speed welding, the protection effect of the surface flux and the back flux on welding seam metal is poor, the welding quality is reduced, the transition position of the groove between the thick board and the thin board is not smooth, a molten pool is more inclined to flow at the side of the thin board, the welding seam forming is influenced, and even the frequent welding burn-through phenomenon is easy to occur.
Disclosure of Invention
The purpose of the invention is: the flux copper liner method submerged-arc welding method for the jointed boards with different thicknesses is provided, and the problems that in the prior art, when the jointed boards with different thicknesses are welded, the welding quality is poor, the welding seam is poor in forming, and welding burn-through occurs in the flux copper liner method submerged-arc welding are solved.
In order to achieve the above object, the present invention provides a submerged arc welding method of a flux copper backing method for jointed boards with unequal thicknesses, comprising the steps of, S1, defining jointed boards with unequal thicknesses as a thick board and a thin board, respectively, determining an opening angle of a groove and a height of a truncated edge according to the thickness of the thin board, and machining a groove at a position to be welded of the thin board and the thick board; s2, chamfering the top end of the groove of the thick plate, wherein the bottom end of the chamfer of the chamfering is flush with the top end of the groove of the thin plate; s3, arranging the thick plate and the thin plate processed in the step II at an assembly station, enabling one side of the thick plate, which is far away from the groove, to be flush with one side of the thin plate and enabling the thick plate to be attached to the truncated edge of the groove of the thin plate, carrying out positioning welding on the thin plate and the thick plate, and installing an arc striking plate and an arc extinguishing plate at two ends of the groove; and S4, centering the center of the groove on the center of the copper gasket spread with the back side welding flux, tightly attaching the copper gasket to the back sides of the thick plate and the thin plate, and carrying out submerged arc welding on the groove by the welding flux copper gasket method.
Preferably, in S1, the thickness of the thin plate is defined as t, the height of the truncated edge is defined as a, the opening angle of the groove is defined as A, when the thickness of the thin plate side is 10 mm-t < 17mm, the opening angle of the groove is 57-63 degrees, and the height of the truncated edge is 2 mm-a < 4 mm; when the thickness of the thin plate side is more than or equal to 17mm and less than or equal to 23mm, the opening angle of the groove is more than or equal to 47 degrees and less than or equal to 53 degrees, and the height of the truncated edge is more than or equal to 2mm and less than or equal to 4 mm; when the thickness of the thin plate side is more than or equal to 23mm and less than 31mm, the opening angle of the groove is more than or equal to 42 degrees and less than or equal to 48 degrees, and the height of the truncated edge is more than or equal to 4mm and less than or equal to 6 mm; when the thickness of the thin plate side is not less than 31mm and not more than 35mm, the opening angle of the groove is not less than 42 degrees and not more than A and not more than 48 degrees, and the height of the truncated edge is not less than 5mm and not more than a and not more than 7 mm.
Preferably, in S2, the included angle between the bevel surface of the beveling process and the horizontal plane is defined as B, and the included angle is more than or equal to 12 degrees and less than or equal to 16 degrees.
Preferably, the angle between the inclined surface of the beveling process and the horizontal plane is 14 °.
Preferably, in S3, the tack welding is completed by using a flux-cored wire carbon dioxide arc welding method in the groove.
Preferably, in S3, the arc striking plate and the arc extinguishing plate have the same thickness as the steel plate on the thin plate side, and the back surfaces of the arc striking plate and the arc extinguishing plate are flush with the back surface of the steel plate.
Preferably, in S4, when the groove is welded by using the flux copper backing method submerged arc welding machine, the inclination angle of each electrode of the welding machine, the distance between the wire contacts of the adjacent electrodes and the distance between the contact tip of each electrode and the thin plate are adjusted, and welding parameters including welding current, welding voltage and welding speed are preset in the welding machine according to the thickness of the thin plate.
Preferably, in S4, the first electrode, the second electrode, and the third electrode of the welding machine are sequentially arranged in a reverse welding direction, the first electrode is inclined by 13-15 ° to one side of the welding direction, the second electrode is vertically arranged, and the third electrode is inclined by 3-5 ° in the reverse welding direction; the distance between the welding wire contacts between the first electrode and the second electrode is 35mm, and the distance between the welding wire contacts between the second electrode and the third electrode is 130 mm; the distance between the contact tip of the first electrode and the sheet was 35mm, the distance between the contact tip of the second electrode and the sheet was 40mm, and the distance between the contact tip of the third electrode and the sheet was 45 mm.
Preferably, in S4, the welding current of the first electrode is 1200-1450A, and the welding voltage is 35-37V, the welding current of the second electrode is 850-1300A, and the welding voltage is 40-42V, and the welding current of the third electrode is 800-1300A, and the welding voltage is 45-48V.
Preferably, the method for submerged arc welding of the jointed boards with different thicknesses by the flux copper lining method further comprises the step S5 of removing welding slag, and cutting an arc striking plate and an arc extinguishing plate at two ends of a welding seam.
Compared with the prior art, the submerged arc welding method of the welding flux copper gasket method of the jointed board with different thicknesses has the beneficial effects that: when the grooves are arranged on the thick plate and the thin plate, the opening angle of the groove and the height of the truncated edge are determined by taking the thickness of the thin plate as a standard due to the small thickness of the thin plate, so that the height of the truncated edge can be ensured, and the steel plate is prevented from being burnt through; the top end of the groove of the thick plate is beveled, the transition position of the groove thick plate and the thin plate is smoothly transited, the distribution of surface welding flux and the flowing direction of a molten pool can be improved, the protection of the welding flux on the thick plate and the formation of a welding seam are ensured, the quality of the welding seam is improved, and the high-efficiency and high-quality welding of the jointed plates with different thicknesses is ensured.
Drawings
FIG. 1 is a groove form diagram of a welding flux copper gasket method submerged arc welding method of jointed boards with different thicknesses, wherein t is more than or equal to 10mm and less than 17 mm;
FIG. 2 is a groove form diagram of the sheet thickness t of 17 mm-23 mm in the welding flux copper backing method submerged arc welding method of the jointed board with different thicknesses of the invention;
FIG. 3 is a groove form diagram of the welding flux copper gasket method submerged arc welding method of the jointed boards with different thicknesses, wherein t is more than or equal to 23mm and less than 31mm in the thickness of a thin plate;
FIG. 4 is a groove form diagram when t is more than or equal to 31mm and less than or equal to 35mm in the sheet thickness of the welding flux copper gasket method submerged arc welding method of the jointed boards with different thicknesses;
FIG. 5 is a layout view of the electrodes of the flux copper backing method for submerged arc welding of panels of varying thicknesses of the present invention.
In the figure, 1, a thick plate; 2. a thin plate; 3. beveling; 4. a first electrode; 5. a second electrode; 6. a third electrode; 7. a contact tip.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The preferred embodiment of the welding flux copper gasket method submerged arc welding method of the jointed board with unequal thicknesses of the invention is shown in figures 1 to 5, and the welding flux copper gasket method submerged arc welding method of the jointed board with unequal thicknesses is used for the condition that the jointed board with unequal thicknesses is submerged arc welded by the welding flux copper gasket method, so that the application of the welding flux copper gasket method submerged arc welding process on the welding seam of the jointed board with unequal thicknesses is realized.
The submerged arc welding method of the welding flux copper gasket method of the jointed board with different thicknesses comprises the following steps:
s1, defining two jointed boards with different thicknesses as a thick board 1 and a thin board 2, determining the opening angle and the height of the truncated edge of the groove 3 according to the thickness of the thin board 2, processing the groove 3 at the position to be welded of the thin board 2 and the thick board 1, and processing the groove 3 at the position to be welded of the steel board by adopting a flame processing or plasma processing mode. Because the thickness of the thin plate 2 is smaller than that of the thick plate 1, the opening angle of the groove 3 and the height of the truncated edge are determined by taking the thin plate 2 as a standard, and the burn-through phenomenon caused by too deep groove 3 and too short truncated edge due to taking the thick plate 1 as a standard can be avoided.
Preferably, when the thickness of the thin plate 2 is defined as t, the height of the truncated edge is defined as a, the opening angle of the groove 3 is defined as A, and the thickness of the side of the thin plate 2 is 10 mm-t < 17mm, the opening angle of the groove 3 is 57-63 degrees, and the height of the truncated edge is 2 mm-a < 4 mm; when the thickness of the side of the thin plate 2 is more than or equal to 17mm and less than 23mm, the opening angle of the groove 3 is more than or equal to 47 degrees and less than or equal to 53 degrees, and the height of the truncated edge is more than or equal to 2mm and less than or equal to 4 mm; when the thickness of the side of the thin plate 2 is more than or equal to 23mm and less than 31mm, the opening angle of the groove 3 is more than or equal to 42 degrees and less than or equal to 48 degrees, and the height of the truncated edge is more than or equal to 4mm and less than or equal to 6 mm; when the thickness t of the side of the thin plate 2 is not less than 31mm and not more than 35mm, the opening angle A of the groove 3 is not less than 42 degrees and not more than 48 degrees, and the height a of the truncated edge is not less than 5mm and not more than 7 mm.
And S2, chamfering the top end of the groove 3 of the thick plate 1, wherein the bottom end of the inclined plane subjected to chamfering is flush with the top end of the groove 3 of the thin plate 2, and the top end of the groove 3 of the thick plate 1 is chamfered by adopting a mechanical cutting machining mode. The beveling treatment can improve the distribution of surface flux and the flowing direction of a molten pool, ensure the protection of the flux on the thick plate 1 and the formation of a welding seam, and improve the quality of the welding seam.
An included angle between the inclined plane of the beveling treatment and the horizontal plane is defined as B, and B is more than or equal to 12 degrees and less than or equal to 16 degrees.
Preferably, the angle between the inclined surface of the beveling process and the horizontal plane is 14 °. The angle of the beveling scheme is too large, undercut (especially at the position of a beveling groove 3) is easily formed on the front surface, the angle of the beveling scheme is too small, the processing difficulty is large, the included angle of 14 degrees is moderate, the moderate transition of a medium plate 1 and a thin plate 2 of a welding joint is ensured, the processing difficulty can be reduced, meanwhile, the welding undercut on the thick plate 1 is avoided, and the welding seam quality is improved.
And S3, arranging the thick plate 1 and the thin plate 2 processed in the step II at an assembly station, adjusting the installation positions of the thick plate 1 and the thin plate 2 to enable one sides of the thick plate 1 and the thin plate 2, which are far away from the groove 3, to be flush and the truncated edge of the groove 3 of the thick plate 1 and the thin plate 2 to be attached tightly, positioning and welding the thin plate 2 and the thick plate 1, and installing arc striking plates and arc extinguishing plates at two ends of the groove 3. The starting point and the end point of the welding seam usually have concave welding openings due to the fact that the welding seam cannot be melted through, in order to avoid cracks and stress concentration after stress, the starting point and the end point of the two ends are respectively arranged on the arc striking plate and the arc extinguishing plate during welding, and then the redundant parts are cut off, so that the section of the welding seam cannot be reduced.
Preferably, the positioning welding is completed in the groove 3 by adopting a flux-cored wire carbon dioxide gas shielded welding mode. The thickness of the arc striking plate and the arc extinguishing plate is consistent with the thickness of the steel plate at the side of the thin plate 2, the back surfaces of the arc striking plate and the arc extinguishing plate are flush with the back surface of the steel plate, and the back surface is a side surface deviating from the groove 3.
S4, centering the center of the groove 3 by the center of the copper gasket spread with the back welding flux, tightly attaching the copper gasket to the back of the thick plate 1 and the thin plate 2, carrying out submerged arc welding on the groove 3 by the welding flux copper gasket method, moving a welding head to the position of an arc striking plate, carrying out welding starting on the arc striking plate, and carrying out welding receiving arc on the arc extinguishing plate after the groove 3 is welded.
When a welding groove 3 is welded by a flux copper backing method submerged arc welding machine, a welding head of the welding machine is moved to the position above the groove 3 of the thick plate 1 and the thin plate 2 to be welded, and the inclination angle of each electrode of the welding machine, the distance between welding wire contacts of adjacent electrodes and the distance between a contact tip 7 of each electrode and the thin plate 2 are adjusted; welding parameters including welding current, welding voltage and welding speed are prefabricated in the welding machine according to the thickness of the sheet 2. The connecting pipe of the welding head flux sand sucking port is replaced by a soft heat-resistant rubber pipe, the sand sucking pipe is guaranteed to have enough flexibility, the sand sucking port is guaranteed to have certain mobility, and the pin slope port 3 is prevented from damaging the sand sucking port.
Preferably, a first electrode 4, a second electrode 5 and a third electrode 6 of the welding machine are sequentially arranged in the reverse welding direction, the first electrode 4 inclines by 13-15 degrees towards one side of the welding direction, the second electrode 5 is vertically arranged, and the third electrode 6 inclines by 3-5 degrees in the reverse welding direction; the welding wire contact distance between the first electrode 4 and the second electrode 5 is 35mm, and the welding wire contact distance between the second electrode 5 and the third electrode 6 is 130 mm; the distance between the contact tip 7 of the first electrode 4 and the sheet 2 is 35mm, the distance between the contact tip 7 of the second electrode 5 and the sheet 2 is 40mm, and the distance between the contact tip 7 of the third electrode 6 and the sheet 2 is 45 mm.
Table 1 is a welding parameter table of the welder, and the welding parameters of the welder are adjusted according to Table 1. The welding current of the first electrode 4 is 1200-1450A, the welding voltage is 35-37V, the welding current of the second electrode 5 is 850-1300A, the welding voltage is 40-42V, the welding current of the third electrode 6 is 800-1300A, and the welding voltage is 45-48V.
TABLE 1
And S5, removing welding slag, and cutting an arc striking plate and an arc extinguishing plate at two ends of the welding seam. The welding slag comprises welding slag on the surface of the welding seam and the surface of the copper liner.
After the welding operation of the jointed board is finished, the surface of the welding seam is visually detected, the surface of the welding seam has no welding defects such as cracks, air holes, undercut and the like, and the B-grade quality requirement in the ISO 5817 standard can be met. And after the welding work of the jointed boards is finished for 24 hours, carrying out ultrasonic detection on the welding joints, detecting by adopting the B-level detection technical grade requirement in the ISO 17640 standard, and detecting the welding joints without the defects of cracks, air holes, slag inclusion, incomplete fusion, incomplete penetration and the like in the welding joints, wherein the welding joints can meet the 2-level acceptance grade requirement in the ISO 11666 standard.
To sum up, the embodiment of the invention provides a welding flux copper gasket method submerged arc welding method for jointed boards with different thicknesses, which is characterized in that when grooves are arranged on a thick plate and a thin plate, because the thickness of the thin plate is smaller, the opening angle of the groove and the height of a truncated edge are determined by taking the thickness of the thin plate as a standard, the height of the truncated edge can be ensured, and the thin plate is prevented from being burnt through; the top end of the groove of the thick plate is beveled, so that the distribution of surface welding flux and the flowing direction of a molten pool can be improved, the protection of the welding flux on the thick plate and the formation of a welding seam are ensured, the quality of the welding seam is improved, and the high-efficiency and high-quality welding of the jointed plates with different thicknesses is ensured.
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 (9)
1. A welding flux copper liner method submerged arc welding method of the jointed board of unequal thickness, wherein including the following steps, S1, define the jointed board of unequal thickness as thick plate and sheet metal separately, confirm the opening angle and height of the truncated edge of the groove according to the thickness of the sheet metal, process the groove in the position to be welded of sheet metal and thick plate; s2, chamfering the top end of the groove of the thick plate, wherein the bottom end of the chamfered inclined plane is flush with the top end of the groove of the thin plate, and an included angle between the chamfered inclined plane and the horizontal plane is defined as B, and B is more than or equal to 12 degrees and less than or equal to 16 degrees; s3, arranging the thick plate and the thin plate processed in the step II at an assembly station, enabling one side of the thick plate, which is far away from the groove, to be flush with one side of the thin plate and enabling the thick plate to be attached to the truncated edge of the groove of the thin plate, carrying out positioning welding on the thin plate and the thick plate, and installing an arc striking plate and an arc extinguishing plate at two ends of the groove; and S4, centering the center of the groove on the center of the copper gasket spread with the back side welding flux, tightly attaching the copper gasket to the back sides of the thick plate and the thin plate, and carrying out submerged arc welding on the groove by the welding flux copper gasket method.
2. The method for submerged arc welding of jointed boards with different thicknesses by the flux copper backing method according to claim 1, wherein in S1, the thickness of the thin plate is defined as t, the height of the truncated edge is defined as a, the opening angle of the groove is defined as A, when the thickness of the thin plate side is 10mm < t < 17mm, the opening angle of the groove is defined as 57 DEG-A < 63 DEG, and the height of the truncated edge is defined as 2mm < a < 4 mm; when the thickness of the thin plate side is more than or equal to 17mm and less than or equal to 23mm, the opening angle of the groove is more than or equal to 47 degrees and less than or equal to 53 degrees, and the height of the truncated edge is more than or equal to 2mm and less than or equal to 4 mm; when the thickness of the thin plate side is more than or equal to 23mm and less than 31mm, the opening angle of the groove is more than or equal to 42 degrees and less than or equal to 48 degrees, and the height of the truncated edge is more than or equal to 4mm and less than or equal to 6 mm; when the thickness of the thin plate side is more than or equal to 31mm and less than or equal to 35mm, the opening angle of the groove is more than or equal to 42 degrees and less than or equal to 48 degrees, and the height of the truncated edge is more than or equal to 5mm and less than or equal to 7 mm.
3. The method of submerged arc welding of unequal thickness panels by flux copper backing according to claim 1, characterized in that the angle between the inclined plane of the beveling process and the horizontal plane is 14 °.
4. The method for submerged arc welding of jointed boards of unequal thicknesses by flux copper backing method according to any one of claims 1-3, characterized in that in S3, tack welding is performed in the groove by means of flux cored wire carbon dioxide gas shielded welding.
5. A method for submerged arc welding of a varying thickness jigsaw puzzle by flux brassing according to any one of claims 1 to 3 wherein the thickness of the arc striking plate and the arc extinguishing plate is equal to the thickness of the side steel plate of the thin plate and the back surfaces of the arc striking plate and the arc extinguishing plate are flush with the back surface of the steel plate in S3.
6. The method for submerged arc welding of unequal thickness panels according to any one of claims 1 to 3 by flux copper backing method, wherein in S4, when the groove is welded by using the flux copper backing method submerged arc welding machine, the inclination angle of each electrode of the welding machine, the spacing between the wire contacts of the adjacent electrodes and the distance between the contact tip of each electrode and the thin plate are adjusted, and welding parameters including welding current, welding voltage and welding speed are prepared in the welding machine according to the thickness of the thin plate.
7. The method for submerged arc welding of jointed boards of unequal thicknesses by flux copper backing method according to claim 6, wherein in S4, the first electrode, the second electrode and the third electrode of the welding machine are arranged in sequence in the reverse welding direction, the first electrode is inclined 13-15 degrees to one side of the welding direction, the second electrode is arranged vertically, and the third electrode is inclined 3-5 degrees in the reverse welding direction; the distance between the welding wire contacts between the first electrode and the second electrode is 35mm, and the distance between the welding wire contacts between the second electrode and the third electrode is 130 mm; the distance between the contact tip of the first electrode and the sheet was 35mm, the distance between the contact tip of the second electrode and the sheet was 40mm, and the distance between the contact tip of the third electrode and the sheet was 45 mm.
8. The method for submerged arc welding of jointed boards with different thicknesses by flux copper lining method as claimed in claim 7, wherein in S4, the welding current of the first electrode is 1200-1450A, the welding voltage is 35-37V, the welding current of the second electrode is 850-1300A, the welding voltage is 40-42V, the welding current of the third electrode is 800-1300A, and the welding voltage is 45-48V.
9. The method for submerged arc welding of unequal thickness panels by flux brassing according to any one of claims 1-3, further comprising the step of S5 of removing slag, cutting an arc striking plate and an arc quenching plate at both ends of the weld.
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| CN113458676B (en) * | 2021-08-20 | 2022-04-15 | 燕山大学 | Tailor-welding method and system for tailor-welded plates with different thicknesses |
| CN114888409B (en) * | 2021-12-16 | 2023-09-26 | 山西北方机械制造有限责任公司 | Welding method of wall-thickness-variable bullet cylinder |
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Application publication date: 20210202 Assignee: GUANGZHOU WENCHUAN HEAVY INDUSTRY Co.,Ltd. Assignor: CSSC HUANGPU WENCHONG SHIPBUILDING Co.,Ltd. Contract record no.: X2023980037443 Denomination of invention: A Flux Copper Backing Submerged arc welding Method for Unequal Thickness Panels Granted publication date: 20220510 License type: Common License Record date: 20230704 |
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Denomination of invention: A submerged arc welding method using flux copper backing for unequal thickness splicing Effective date of registration: 20231219 Granted publication date: 20220510 Pledgee: Shanghai Pudong Development Bank Limited by Share Ltd. Guangzhou branch Pledgor: CSSC HUANGPU WENCHONG SHIPBUILDING Co.,Ltd. Registration number: Y2023980072271 |