CN108672890B - Welding system and welding method for high-strength steel capable of applying external load - Google Patents
Welding system and welding method for high-strength steel capable of applying external load Download PDFInfo
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- CN108672890B CN108672890B CN201810761148.5A CN201810761148A CN108672890B CN 108672890 B CN108672890 B CN 108672890B CN 201810761148 A CN201810761148 A CN 201810761148A CN 108672890 B CN108672890 B CN 108672890B
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- strength steel
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- external load
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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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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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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- Optics & Photonics (AREA)
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Abstract
A welding system and a welding method for high-strength steel capable of applying external load can apply external load to the high-strength steel in the welding process, and can generate force action on a welding seam and a surrounding area thereof under the action of the external load to change the stress value and distribution of the welding seam and the surrounding area thereof, so that the welding residual stress of a high-strength steel plate is improved, and the crystallization state of crystal grains can be changed under the action of the external load to refine the crystal grains, so that the toughness of the welding seam and the surrounding area thereof are improved, and the defects of stress concentration and insufficient toughness in the welding process of the high-strength steel are overcome. The invention also has the characteristics of simple structure, easy operation and the like, and the welding system more flexibly optimizes the traditional single arc welding and has wide application prospect. Especially has important significance for further popularization of high-strength steel welding products.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a welding system and a welding method for high-strength steel capable of applying load externally.
Background
The low-alloy high-strength steel has excellent performances of high strength, good ductility and toughness and the like, gradually replaces carbon steel and is widely applied to the industries of engineering machinery, port machinery, automobiles, railway vehicles, bridges, chemical engineering, pressure vessels and the like, compared with common carbon steel, the low-alloy high-strength steel has nearly doubled use strength and service life, can reduce the weight of the low-alloy high-strength steel under the condition of meeting the same strength, effectively reduces the resource consumption, meets the requirements of the 21 st century on high efficiency of materials and saving development concept, and can bring great benefits for the economic construction of China. Becomes the main direction of the future research and development of steel materials in China.
However, in the welding process of the low-alloy high-strength steel, large and concentrated welding residual stress is easily generated, and embrittlement phenomenon easily occurs in a welding heat affected zone, so that a welded component is subjected to stress corrosion cracking and even brittle fracture, the fatigue resistance is seriously reduced, and the service life of the component is greatly shortened. In order to reduce the above-mentioned adverse effects, many techniques are applied, and introduction of an external load during welding is one of the techniques for reducing such adverse effects. The external load is introduced in the welding process, the action of force can be generated on the welding seam and the periphery of the welding seam, the stress value and the distribution of the welding seam and the periphery area of the welding seam are changed, the welding residual stress of the high-strength steel plate is improved, the crystal grain crystallization state can be changed, the crystal grains are refined, the welding toughness of the high-strength steel is further improved, the welding piece is processed before or after welding by the traditional technologies of preheating method, heat treatment, hammering and the like, and the influence of the external load on the welding residual stress and the structure performance of the high-strength steel is not studied in the welding process.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art. The invention provides a welding system and a welding method for high-strength steel capable of externally applying a load.
The technical solution adopted by the invention is as follows: the utility model provides a but welding system for high-strength steel of external load, includes the arc welding system of compriseing welder and welding wire, but welding system for high-strength steel of external load still including the external load system, the external load system include operation platform, operation platform on be equipped with and be used for placing the carrier of treating the high-strength steel, the carrier constitute by left carrier and right carrier, the carrier get both sides and still be equipped with anchor clamps, the both sides of anchor clamps still be equipped with for applying the drive arrangement of external load between the anchor clamps.
The driving device is a hydraulic cylinder, the hydraulic cylinder and the clamp are in transmission through a hydraulic cylinder column, and the hydraulic cylinder column is in threaded connection with the clamp.
The external load system also comprises an oil pump and an oil pipe, and the oil pump is communicated with the hydraulic cylinder through the oil pipe.
The hydraulic cylinder is provided with a near high-strength steel oil port to be welded close to the side of the hydraulic cylinder column and a far high-strength steel oil port to be welded far away from the side of the hydraulic cylinder column, and the near high-strength steel oil port to be welded and the far high-strength steel oil port to be welded are communicated with the oil pump through oil pipes.
The applied load system further comprises a regulation control device for controlling the position of the oil entering the hydraulic cylinder.
And the carrier is provided with a bolt for fixing the high-strength steel to be welded.
The clamp on one side of the carrier is connected with the hydraulic cylinder column, and the clamp on the other side is a fixed end.
The operation platform on still be equipped with the fixed plate, the fixed plate pass through screw and stiff end anchor clamps fixed connection.
A welding method adopting a welding system for high-strength steel capable of being externally applied with load comprises the following steps: fixing two pieces of to-be-welded high-strength steel to a carrier through bolts, vertically placing a welding gun in the middle of the two to-be-welded high-strength steel plates in the width direction, starting an oil pump, applying an external load when the oil pump normally operates, starting an arc welding system when the external load acts, enabling a welding wire to generate an electric arc, and starting welding along the length direction of the steel plates, so that the electric arc and the external load act on the to-be-welded high-strength steel together.
In the welding method, the external load is applied by pressurizing step by step, and the maximum external load applied to the welded high-strength steel plate can reach 750 MPa.
The invention has the beneficial effects that: the invention provides a welding system and a welding method for high-strength steel capable of applying external load, which can apply external load to the high-strength steel in the welding process, can generate force on a welding seam and a surrounding area thereof under the action of the external load, change the stress value and the distribution of the welding seam and the surrounding area thereof, improve the welding residual stress of a high-strength steel plate, change the crystallization state of crystal grains under the action of the external load, refine the crystal grains, further improve the toughness of the welding seam and the surrounding area thereof, and overcome the defects of stress concentration and insufficient toughness in the welding process of the high-strength steel. The invention also has the characteristics of simple structure, easy operation and the like, and the welding system more flexibly optimizes the traditional single arc welding and has wide application prospect. Especially has important significance for further popularization of high-strength steel welding products.
Drawings
FIG. 1 is a front view of the structure of the present invention.
FIG. 2 is a top view of the structure of the present invention.
In the figure, 1-welding gun, 2-operation platform, 3-hydraulic cylinder, 11-welding wire, 21-carrier, 22-clamp, 23-bolt, 24-fixing plate, 31-hydraulic cylinder column, 32-oil pipe, 33-near high-strength steel oil port to be welded and 34-far high-strength steel oil port to be welded.
Detailed Description
In order to clearly understand the technical contents of the present invention, the following examples are given in detail.
As shown in fig. 1 and 2, a welding system for high-strength steel capable of applying load comprises an arc welding system consisting of a welding gun 1 and a welding wire 11, the welding system for high-strength steel capable of applying load further comprises an application load system, the application load system comprises an operating platform 2, a carrier 21 for placing high-strength steel to be welded is arranged on the operating platform 2, the carrier 21 consists of a left carrier and a right carrier, clamps 22 are further arranged on two sides of the carrier 21, and driving devices for applying load between the clamps 22 are further arranged on two sides of the clamps 22.
The driving device is a hydraulic cylinder 3, and the hydraulic cylinder 3 and the clamp 22 are transmitted through a hydraulic cylinder column 31. The hydraulic cylinder column 31 is connected with the clamp 22 through threads.
The external load system also comprises an oil pump and an oil pipe 32, and the oil pump is communicated with the hydraulic cylinder 3 through the oil pipe 32.
The hydraulic cylinder 3 is provided with a near-to-be-welded high-strength steel oil port 33 close to the side of the hydraulic cylinder column 31 and a far-to-be-welded high-strength steel oil port 34 far away from the side of the hydraulic cylinder column 31, and the near-to-be-welded high-strength steel oil port 33 and the far-to-be-welded high-strength steel oil port 34 are both communicated with the oil pump through oil pipes 32.
And starting the oil pump, enabling the oil to enter the oil pipe, and enabling the oil to enter the hydraulic cylinders on the two sides through the high-strength steel oil ports to be welded on the two sides through the adjusting and controlling system when the oil pump normally runs, wherein the external load is expressed as tensile force. And starting the oil pump, enabling the oil to enter the oil pipe, and enabling the oil to pass through the high-strength steel oil ports to be welded on two sides and enter the hydraulic cylinders on the two sides through the adjusting and controlling system when the oil pump normally runs, wherein the external load is expressed as pressure.
The applied load system also comprises a regulating control device which controls the position of the oil entering the hydraulic cylinder 3.
And the carrier 21 is provided with a bolt 23 for fixing the high-strength steel to be welded.
The clamp 22 on one side of the carrier 21 is connected with the hydraulic cylinder column 31, and the clamp 22 on the other side is a fixed end.
The operation platform 2 is further provided with a fixing plate 24, and the fixing plate 24 is fixedly connected with the fixing end clamp 22 through a screw.
A welding method adopting a welding system for high-strength steel capable of being externally applied with load comprises the following steps: fixing two pieces of to-be-welded high-strength steel to a carrier through bolts, vertically placing a welding gun in the middle of the two to-be-welded high-strength steel plates in the width direction, starting an oil pump, applying an external load when the oil pump normally operates, starting an arc welding system when the external load acts, enabling a welding wire to generate an electric arc, and starting welding along the length direction of the steel plates, so that the electric arc and the external load act on the to-be-welded high-strength steel together.
In the welding method, the external load is applied by pressurizing step by step, and the maximum external load applied to the welded high-strength steel plate can reach 750 MPa.
When the high-strength steel welding device works, the oil pump is started, when the oil pump normally runs, one end of the high-strength steel to be welded is connected and fixed with the clamp at the fixed end through the bolt, the other end of the high-strength steel to be welded is also connected and fixed with the clamp at the tail end of the hydraulic cylinder column through the bolt, when the adjusting and controlling system enables oil to enter the hydraulic cylinder from the oil port close to the high-strength steel to be welded through the oil pipe, the hydraulic cylinder column contracts towards respective hydraulic cylinder at the moment, the external load is shown as tensile force at the moment, when the arc welding system is started while the adjusting and controlling system is used, the welding wire generates electric arc, the welding is started along the length.
When the high-strength steel welding machine works, the oil pump is started, when the oil pump normally runs, one end of high-strength steel to be welded is fixedly connected with a clamp at a fixed end through a bolt, the other end of the high-strength steel to be welded is fixedly connected with a clamp at the tail end of a hydraulic cylinder column through a bolt, when an adjusting control system enables oil to pass through an oil pipe and enter a hydraulic cylinder from a far high-strength steel oil port, the hydraulic cylinder column extends outwards at the moment, the external load is expressed as pressure at the moment, the electric arc welding system is started when the adjusting control system is used, the welding wire generates electric arc, welding is started along the length direction of the steel plate, and the electric arc and the external.
In the above structure, it is necessary to apply pressure step by step during actual welding, and it is impossible to make the force applied to the high-strength steel plate to be welded large at a time. And the magnitude of external load acting on the high-strength steel to be welded and the speed of the acting process can be changed by adjusting the system, and the maximum external load acting on the high-strength steel plate to be welded, including the maximum tensile force and the maximum pressure, can reach 750 MPa.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a but welding system for high-strength steel of external load, includes the electric arc welding system of compriseing welder (1) and welding wire (11), its characterized in that, but welding system for high-strength steel of external load still including external load system, external load system include operation platform (2), operation platform (2) on be equipped with and be used for placing carrier (21) of waiting to weld high-strength steel, carrier (21) constitute by left carrier and right carrier, the both sides of carrier (21) still be equipped with anchor clamps (22), the both sides of anchor clamps (22) still be equipped with for applying the drive arrangement of external load between anchor clamps (22), anchor clamps (22) of carrier (21) one side link to each other with hydraulic cylinder post (31), anchor clamps (22) of opposite side are electric arc, the stiff end begins to weld along steel sheet length direction.
2. A high-strength steel welding system capable of applying load according to claim 1, wherein the driving device is a hydraulic cylinder (3), the hydraulic cylinder (3) and the clamp (22) are driven through a hydraulic cylinder column (31), and the hydraulic cylinder column (31) and the clamp (22) are connected through threads.
3. A loadable high-strength steel welding system according to claim 2, further comprising an oil pump and an oil pipe (32), wherein the oil pump is communicated with the hydraulic cylinder (3) through the oil pipe (32).
4. The welding system capable of applying a load to high-strength steel is characterized in that a near-to-be-welded high-strength steel oil port (33) close to the side of a hydraulic cylinder column (31) and a far-to-be-welded high-strength steel oil port (34) far away from the side of the hydraulic cylinder column (31) are formed in the hydraulic cylinder (3), and the near-to-be-welded high-strength steel oil port (33) and the far-to-be-welded high-strength steel oil port (34) are both communicated with an oil pump through an oil pipe (32).
5. A loadable high-strength steel welding system according to claim 4, further comprising adjustment control means for controlling the position of the oil entering the hydraulic cylinder (3).
6. A welding system for high-strength steel with external load according to claim 1, wherein the carrier (21) is provided with bolts (23) for fixing the high-strength steel to be welded.
7. A welding system for high-strength steel capable of being applied with load according to claim 1, characterized in that a fixing plate (24) is further arranged on the operating platform (2), and the fixing plate (24) is fixedly connected with the fixing end clamp (22) through a screw.
8. A welding method using the welding system for high-strength steel to which a load can be applied according to claim 1, comprising the steps of: fixing two pieces of to-be-welded high-strength steel to a carrier through bolts, vertically placing a welding gun in the middle of the two to-be-welded high-strength steel plates in the width direction, starting an oil pump, applying an external load when the oil pump normally operates, starting an arc welding system when the external load acts, enabling a welding wire to generate an electric arc, and starting welding along the length direction of the steel plates, so that the electric arc and the external load act on the to-be-welded high-strength steel together.
9. The welding method of claim 8, wherein the external load applied in the welding method needs to be gradually pressurized, and the maximum external load applied to the high-strength steel plates to be welded can reach 750 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810761148.5A CN108672890B (en) | 2018-07-24 | 2018-07-24 | Welding system and welding method for high-strength steel capable of applying external load |
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| CN201810761148.5A CN108672890B (en) | 2018-07-24 | 2018-07-24 | Welding system and welding method for high-strength steel capable of applying external load |
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| CN108672890A CN108672890A (en) | 2018-10-19 |
| CN108672890B true CN108672890B (en) | 2021-02-12 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474732A (en) * | 2009-02-03 | 2009-07-08 | 齐齐哈尔轨道交通装备有限责任公司 | Method for welding railway vehicle side wallboard |
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| JPH0275469A (en) * | 1988-09-12 | 1990-03-15 | Fuji Photo Film Co Ltd | Method and device for joining beltlike metal plates |
| CN204800209U (en) * | 2015-08-01 | 2015-11-25 | 西安科技大学 | Engineering vehicle transaxle shell assembly jig for welding with load adds function in advance |
| CN105643131A (en) * | 2016-03-03 | 2016-06-08 | 天津大学 | Device for testing cold cracking tendency of welding joint on basis of adjustable rigid restraint and apparition of device |
| JP6676516B2 (en) * | 2016-11-30 | 2020-04-08 | ムネカタインダストリアルマシナリー株式会社 | Processing equipment |
| CN108161324A (en) * | 2018-03-30 | 2018-06-15 | 吉林大学 | Aluminium alloy heat dissipation cold plate spreads welding clamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101474732A (en) * | 2009-02-03 | 2009-07-08 | 齐齐哈尔轨道交通装备有限责任公司 | Method for welding railway vehicle side wallboard |
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