CN114749760A - Steel plate high heat input welding method - Google Patents
Steel plate high heat input welding method Download PDFInfo
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- CN114749760A CN114749760A CN202210470862.5A CN202210470862A CN114749760A CN 114749760 A CN114749760 A CN 114749760A CN 202210470862 A CN202210470862 A CN 202210470862A CN 114749760 A CN114749760 A CN 114749760A
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- welding
- wire
- heat input
- welding wire
- seam
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- 238000003466 welding Methods 0.000 title claims abstract description 252
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The invention relates to the technical field of welding, in particular to a steel plate large heat input welding method, which comprises the following steps: and (3) welding: welding by adopting a first welding wire and a second welding wire, wherein the first welding wire and the second welding wire are arranged along the thickness direction of the steel plate, the first welding wire is positioned at one side close to the root of the welding seam, and the second welding wire is positioned at one side far away from the root of the welding seam; the first welding wire does not swing, and the second welding wire swings along the thickness direction of the steel plate; and (3) forming a welding seam: installing a sliding block on the front side of the welding seam, wherein a cooling loop of the second welding wire passes through the sliding block, and the sliding block is used for forming the front side of the welding seam; and installing a liner on the back of the welding seam, wherein the liner is used for molding the back of the welding seam. The welding method can solve the problem of low efficiency when the thick steel plate butt weld seam is manually and semi-automatically welded by FCAW, avoid or reduce the generation of welding defects, and improve the welding efficiency and quality of the thick plate vertical butt weld seam.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a large heat input welding method for steel plates.
Background
The welding line energy is a function of welding current I (A), arc voltage E (V) and welding speed v (cm/s), the value of the welding line energy is equal to that the higher the welding line energy which can be borne by steel is, the higher the welding speed is, the higher the welding construction efficiency is, wherein the steel which can bear the line energy more than 50kJ/cm is called large line energy welding steel, and the welding line energy is mainly applied to the fields of ship plates, oil tanks, high-rise building structures and the like. With the improvement of the thickness, strength and welding efficiency of the steel plate, the steel plate is required to have higher welding performance so as to adapt to large heat input welding, and the adaptation to the large heat input welding becomes the development trend of a thick plate.
Currently, in the container construction process, the torsion box section is made of thick plates (e.g. 60mm), wherein vertical butt welds of the thick plates are involved. When vertical butt welding of thick plates is carried out, the currently adopted welding method is single-wire vertical gas electric welding or flux-cored arc welding (FCAW for short) manual semi-automatic welding. The existing thick plate welding method has the following problems: 1) the monofilament vertical electrogas welding is adopted for welding, and the situation that the root part cannot be welded through easily can be caused due to the thick plate (the thickness is more than 45 mm); 2) the FCAW manual semi-automatic welding is adopted, multilayer multi-pass welding is needed, the welding efficiency is low, and welding defects are easy to generate due to manual operation; 3) the welding qualification rate of the thick plate is low.
Therefore, a method for welding steel plates with high heat input is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a steel plate high heat input welding method which is simple in structure, convenient to install and low in processing cost.
In order to realize the purpose, the following technical scheme is provided:
a steel plate high heat input welding method is applied to vertical butt weld welding of steel plates, the thickness range of the steel plates is 45mm-85mm, and the steel plate high heat input welding method comprises the following steps:
and (3) welding: welding by adopting a first welding wire and a second welding wire, wherein the first welding wire and the second welding wire are arranged along the thickness direction of the steel plate, the first welding wire is positioned at one side close to the root of the welding seam, and the second welding wire is positioned at one side far away from the root of the welding seam; the first welding wire does not swing, and the second welding wire swings along the thickness direction of the steel plate;
and (3) forming a welding seam: installing a sliding block on the front side of the welding seam, wherein a cooling loop of the second welding wire passes through the sliding block, and the sliding block is used for forming the front side of the welding seam; and installing a gasket on the back of the welding seam, wherein the gasket is used for molding the back of the welding seam.
As an alternative of the steel plate high heat input welding method, the distance D1 between the first welding wire and the root of the welding seam is 10mm-30mm during the welding process.
As an alternative of the steel plate high heat input welding method, the distance D2 between the second welding wire and the first welding wire is 5mm-30mm during welding.
As an alternative of the steel plate high heat input welding method, the first welding wire is direct current in the welding process.
As an alternative of the steel plate high heat input welding method, the second welding wire is in direct current reversal connection in the welding process.
As an alternative of the steel plate high heat input welding method, the swing range W of the second welding wire is 5mm-30mm in the welding process.
As an alternative of the steel plate high heat input welding method, the second welding wire stays for 0-2.5 s at the end point of the swing in the welding process.
As an alternative to the high heat input welding method for steel plates, a twin wire vertical gas electric welding is used for welding during the welding process.
As an alternative to the high heat input welding method for steel plates, welding is performed from the bottom up during the welding process.
As an alternative to the high heat input welding method for steel plates, the liner is a ceramic liner during the weld forming process.
As an alternative to the high heat input welding method for the steel plates, the liner is a copper liner during the formation of the weld.
Compared with the prior art, the invention has the beneficial effects that:
the steel plate high heat input welding method provided by the invention adopts double-wire welding aiming at the vertical butt weld of the thick steel plate, realizes the single-pass welding forming of the vertical butt weld of the thick steel plate, solves the problem of low efficiency when the butt weld of the thick steel plate adopts FCAW manual semi-automatic welding, avoids or reduces the generation of welding defects, and improves the welding efficiency and quality of the vertical butt weld of the thick steel plate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a steel plate, a first welding wire and a second welding wire according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a steel plate and a gasket according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second welding wire swing range according to an embodiment of the present invention.
Reference numerals:
100-steel plate;
10-a first welding wire; 20-a second welding wire; 30-liner.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the present embodiment provides a steel plate large heat input welding method, which is applied to vertical butt weld welding of a steel plate 100, wherein the thickness of the steel plate 100 ranges from 45mm to 85mm, and the steel plate large heat input welding method includes the following steps:
and (3) welding: welding is carried out by adopting a first welding wire 10 and a second welding wire 20, wherein the first welding wire 10 and the second welding wire 20 are arranged along the thickness direction of the steel plate 100, the first welding wire 10 is positioned on one side close to the root of a welding seam, and the second welding wire 20 is positioned on one side far away from the root of the welding seam; the first welding wire 10 does not swing, and the second welding wire 20 swings in the thickness direction of the steel plate 100;
and (3) forming a welding seam: installing a sliding block on the front side of the welding seam, wherein a cooling loop of the second welding wire passes through the sliding block, and the sliding block is used for forming the front side of the welding seam; a gasket 30 is installed on the back side of the weld, and the gasket 30 is used for molding the back side of the weld.
According to the steel plate high heat input welding method, double-wire welding is adopted for vertical butt welding seams of steel plates, single-pass welding forming of the vertical butt welding seams of the steel plates is achieved, the problem of low efficiency when FCAW manual semi-automatic welding is adopted for the butt welding seams of thick steel plates is solved, welding defects are avoided or reduced, and welding efficiency and quality of the vertical butt welding seams of the thick steel plates are improved.
The embodiment also provides a welding device which comprises two welding guns, two water tanks and a walking welding head, wherein the first welding wire 10 and the second welding wire 20 are fixed on the welding head. The water tank is used for carrying out circulating water cooling to the welding gun, avoids the welding gun high temperature.
In one embodiment, in the welding process, double-wire vertical electrogas welding is adopted for welding, so that single-pass welding forming of vertical butt welds of thick steel plates is realized, and the problem of low efficiency when FCAW manual semi-automatic welding is adopted for the butt welds of the thick steel plates is solved.
In one embodiment, during the welding process, the welding is performed from bottom to top. The welding method can improve the quality of the welding seam.
In one embodiment, the first wire 10 is direct current positive during welding.
In one embodiment, the second wire 20 is DC-reverse during welding.
In one embodiment, the distance D1 between the first wire 10 and the root of the weld during welding is 10mm-30 mm. The design can ensure that the first welding wire 10 is filled with the welding seam groove after being melted, and the welding quality of the root of the welding seam is improved. For example, the distance between the first welding wire 10 and the root of the weld may be any value in the range of 10mm to 30mm, such as 10mm, 15mm, 20mm, 25mm, 30mm, etc.
In one embodiment, the distance D2 between the second wire 20 and the first wire 10 is 5mm-30mm during welding. The design can ensure that the second welding wire 20 and the first welding wire 10 are completely filled with the weld groove after being melted, and the welding quality is improved. For example, the distance between the second welding wire 20 and the first welding wire 10 may be any value in a range of 5mm to 30mm, such as 5mm, 10mm, 15mm, 20mm, 25mm, and 30 mm.
In other embodiments, the distance between the first welding wire 10 and the root of the weld and the distance between the second welding wire 20 and the first welding wire 10 can be set according to the thickness of the steel plate 100 and the large heat input.
In one embodiment, the swing range W of the second welding wire 20 is 5mm to 30mm during welding. The design can ensure that the second welding wire 20 and the first welding wire 10 are completely filled with the weld groove after being melted, and the welding quality is improved. Illustratively, the swing range of the second welding wire 20 may be any value in a range of 5mm to 30mm, such as 5mm, 10mm, 15mm, 20mm, 25mm, and 30 mm.
In one embodiment, the second wire 20 stays at the end of the oscillation for a time of 0s to 2.5s during the welding process. The design can ensure that the second welding wire 20 and the first welding wire 10 are completely filled with the weld groove after being melted, and the welding quality is improved. In other embodiments, the swing range of the second welding wire 20 and the staying time thereof at the end point may be set according to the thickness of the steel plate 100.
In one embodiment, the liner 30 is a ceramic liner during the weld formation process. In another embodiment, the liner is a copper liner.
Illustratively, the present embodiment provides parameters for a high heat input welding process for steel sheets 100 of different thicknesses, as detailed in the weld parameter table of table 1.
TABLE 1 welding parameter Table
According to the steel plate high heat input welding method provided by the embodiment, welding processes such as welding wire distance, swing width, residence time and welding parameters are formulated, one-pass welding and double-face forming are carried out on the vertical butt-joint welding seam of the thick plate, the welding efficiency and the welding quality are effectively improved, and meanwhile, the welding defect caused by multilayer multi-pass welding carried out by manual semi-automatic welding on the butt-joint welding seam of the thick plate is avoided.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The large heat input welding method for the steel plate is applied to vertical butt weld welding of the steel plate (100), the thickness range of the steel plate (100) is 45-85 mm, and the large heat input welding method for the steel plate is characterized by comprising the following steps of:
and (3) welding: welding is carried out by adopting a first welding wire (10) and a second welding wire (20), the first welding wire (10) and the second welding wire (20) are arranged along the thickness direction of the steel plate (100), the first welding wire (10) is positioned on one side close to the root of a welding seam, and the second welding wire (20) is positioned on one side far away from the root of the welding seam; the first welding wire (10) does not swing, and the second welding wire (20) swings along the thickness direction of the steel plate (100);
and (3) forming a welding seam: installing a sliding block on the front surface of the welding seam, wherein a cooling loop of the second welding wire (20) passes through the sliding block, and the sliding block is used for forming the front surface of the welding seam; and installing a gasket (30) on the back of the welding seam, wherein the gasket (30) is used for molding the back of the welding seam.
2. The high heat input welding method of steel plates according to claim 1, characterized in that the distance D1 between the first welding wire (10) and the root of the weld during welding is 10mm-30 mm.
3. The high heat input welding method of steel plates according to claim 2, characterized in that the distance D2 between the second welding wire (20) and the first welding wire (10) is 5mm-30mm during welding.
4. The high heat input welding method for steel plates according to claim 1, characterized in that the first welding wire (10) is direct current during welding.
5. The high heat input welding method for steel plates according to claim 4, characterized in that the second welding wire (20) is DC-reversed during welding.
6. The high heat input welding method of steel plates according to claim 1, characterized in that the swing range W of the second welding wire (20) is 5mm to 30mm during welding.
7. The high heat input welding method for steel plates according to claim 6, characterized in that the second welding wire (20) stays at the end point of the oscillation for 0s-2.5s during the welding process.
8. The high heat input welding method of steel plates according to claim 1, characterized in that in the welding process, welding is performed using a twin wire vertical gas welding.
9. The high heat input welding method of claim 8, wherein the welding is performed from bottom to top during the welding process.
10. A method of high heat input welding of steel plates according to any of the claims 1-9, characterized in that during the formation of the weld seam, the liner (30) is a ceramic liner; or the liner is a copper liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470862.5A CN114749760A (en) | 2022-04-28 | 2022-04-28 | Steel plate high heat input welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210470862.5A CN114749760A (en) | 2022-04-28 | 2022-04-28 | Steel plate high heat input welding method |
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| CN114749760A true CN114749760A (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210470862.5A Pending CN114749760A (en) | 2022-04-28 | 2022-04-28 | Steel plate high heat input welding method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323469A (en) * | 1995-05-30 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | High speed horizontal fillet welding method |
| JPH1058142A (en) * | 1996-08-12 | 1998-03-03 | Mitsubishi Heavy Ind Ltd | Electrogas arc welding method |
| JP2002103041A (en) * | 2000-09-26 | 2002-04-09 | Nippon Steel Corp | Dual-electrode vertical electrogas arc welding method for extra-thick steel member |
| CN1498712A (en) * | 2002-10-31 | 2004-05-26 | 株式会社神户制钢所 | Tubular wire rod for double-electrode gas protective welding, its welding method and appts. |
| CN202894559U (en) * | 2012-07-09 | 2013-04-24 | 沈阳大学 | Water-cooled welding gun for thick steel plate vertical seam automatic welding |
| CN104985284A (en) * | 2015-06-30 | 2015-10-21 | 苏州华日金菱机械有限公司 | Double-wire electrogas welding machine |
| CN110369829A (en) * | 2019-08-06 | 2019-10-25 | 深圳市瑞凌实业股份有限公司 | A kind of electro-gas (enclosed) welding device and welding method |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
-
2022
- 2022-04-28 CN CN202210470862.5A patent/CN114749760A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323469A (en) * | 1995-05-30 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | High speed horizontal fillet welding method |
| JPH1058142A (en) * | 1996-08-12 | 1998-03-03 | Mitsubishi Heavy Ind Ltd | Electrogas arc welding method |
| JP2002103041A (en) * | 2000-09-26 | 2002-04-09 | Nippon Steel Corp | Dual-electrode vertical electrogas arc welding method for extra-thick steel member |
| CN1498712A (en) * | 2002-10-31 | 2004-05-26 | 株式会社神户制钢所 | Tubular wire rod for double-electrode gas protective welding, its welding method and appts. |
| CN202894559U (en) * | 2012-07-09 | 2013-04-24 | 沈阳大学 | Water-cooled welding gun for thick steel plate vertical seam automatic welding |
| CN104985284A (en) * | 2015-06-30 | 2015-10-21 | 苏州华日金菱机械有限公司 | Double-wire electrogas welding machine |
| CN110369829A (en) * | 2019-08-06 | 2019-10-25 | 深圳市瑞凌实业股份有限公司 | A kind of electro-gas (enclosed) welding device and welding method |
| CN112589233A (en) * | 2020-12-02 | 2021-04-02 | 上海江南长兴造船有限责任公司 | One-step forming welding method for hull structure panel |
Non-Patent Citations (1)
| Title |
|---|
| 王宗杰: "《工程材料焊接技术问答》", 机械工业出版社, pages: 127 * |
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Application publication date: 20220715 |