CN112207433A - Gas protection device and method for continuous laser welding - Google Patents
Gas protection device and method for continuous laser welding Download PDFInfo
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- CN112207433A CN112207433A CN202011137651.7A CN202011137651A CN112207433A CN 112207433 A CN112207433 A CN 112207433A CN 202011137651 A CN202011137651 A CN 202011137651A CN 112207433 A CN112207433 A CN 112207433A
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
- B23K26/703—Cooling arrangements
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- Laser Beam Processing (AREA)
Abstract
The invention belongs to the technical field of laser welding, and particularly provides a gas protection device and a gas protection method for continuous laser welding, wherein the position and the posture of a gas knife block are adjusted to enable a gas outlet of the gas knife block to be aligned with a welding seam, and particularly high-pressure air is emitted by a high-pressure air transverse blowing module at the laser welding position and is used for transversely blowing the welding seam to blow away splashes at the welding position; controlling a mixed shielding gas module at the laser welding position to emit high-pressure mixed gas to protect a welding seam molten pool; controlling the protective gas module in the high-temperature area at the rear part of the welding seam to emit inert gas to protect the welding seam from being oxidized; controlling an air knife cooling module to cool an air knife block; and controlling the suction gas module to suck the welding seam. The correct blowing and protection can effectively protect the weld pool from being reduced or even prevented from being oxidized; the splashing generated in the welding process is effectively reduced; the welding seam is uniformly spread when the welding seam molten pool is solidified, so that the welding seam is uniformly and beautifully formed; effectively reducing the shielding effect of metal steam plume or plasma cloud on laser.
Description
Technical Field
The invention belongs to the technical field of laser welding, and particularly relates to a gas protection device and a gas protection method for continuous laser welding.
Background
Laser welding is characterized in that a laser beam is focused in a small area through an optical system, a heat source area with highly concentrated energy is formed at a welded position in a very short time, so that a welded object is melted and recrystallized to form a firm welding point and a welding seam, the surface of a welding workpiece absorbs a large amount of heat to be rapidly melted and further vaporized in the laser welding process, a plume is formed on the welding workpiece, the plume is absorbed and scattered on an incident path of the laser beam to influence the welding quality and the welding penetration, the plume after absorbing the energy is easy to generate plasma, the plasma absorbs and refracts the laser after being formed to generate a shielding effect on the laser beam to further influence the welding penetration again, and if no protective effective protective measures and methods are provided for the laser welding, gas or protective gas at the welding position easily enters a molten pool in a bubble form and is remained in the welding seam, and in addition, spatter is extremely easy to generate in the laser welding process, and the spatter can pollute the protective lens of the laser welding head, so that the welding quality is influenced.
Disclosure of Invention
The invention aims to provide a gas protection device and a gas protection method for continuous laser welding, which have the advantages of simple structure and low cost and are used for solving the technical problems.
The invention provides a gas protection device for continuous laser welding, which comprises a suction gas module, an air knife cooling module and an air knife protection module, wherein the air knife protection module comprises an air knife block, and the air knife block comprises a high-pressure air transverse blowing module at a laser welding position, a mixed protection gas module at the laser welding position and a high-temperature area protection gas module at the rear part of a welding line;
the laser welding device comprises a suction gas module, a laser welding position mixed protective gas module, a welding seam molten pool, a welding seam rear high-temperature area protective gas module, an air knife cooling module and a welding seam rear high-pressure air transverse blowing module, wherein the suction gas module is used for timely sucking the smoke and the splashes generated in the laser welding process, the laser welding position mixed protective gas module is used for protecting the welding seam molten pool, the welding seam rear high-temperature area protective gas module is used for protecting the welding seam from being oxidized, the laser welding position high-pressure air transverse blowing module is used for transversely blowing away the splashes at the welding position, meanwhile.
Preferably, the air suction module comprises an air suction module fixing block, an air suction module Z-axis adjusting block, an air suction module X-axis adjusting block, an air suction module rotating shaft clamping block and an air suction barrel;
the exhaust fan barrel is connected with the exhaust module fixing block through a welding head, the exhaust module Z-axis adjusting block is fixedly connected with the exhaust module fixing block to realize Z-axis movement, the exhaust module X-axis adjusting block is fixedly connected with the exhaust module Z-axis adjusting block to realize X-axis direction movement, and the exhaust module rotating shaft clamping block is fixedly connected with the exhaust module X-axis adjusting block to realize Y-axis direction rotation regulation.
Preferably, the air draft module Z-axis adjusting block, the air draft module X-axis adjusting block and the air draft module rotating shaft clamping block are fixedly connected through the waist-shaped hole in sequence.
Preferably, the air knife protection module comprises a three-axis pan-tilt head for driving the air knife block to adjust the posture, and the welding seam is located in the blowing track of the air knife block.
Preferably, the three-axis holder adopts a screw rod driving structure, the moving precision of the three-axis holder is 0.1mm, and the rotating precision is 1 degree.
Preferably, the high-pressure air transverse blowing module at the laser welding position is used for blowing air to the welding position, the working pressure of the air is not lower than 0.5MPA, and the air transverse blowing module is connected to the air inlet of the air knife block through an air pipe.
Preferably, the laser welding part mixed protective gas module is used for mixing nitrogen and argon, the working pressure of the mixed gas is not lower than 0.5MPA, and the working flow is 20L/Min.
Preferably, the nitrogen and the argon are respectively connected to the inlets of the two mixed gas channels of the gas knife block through gas pipes, the two mixed gas channels are independent at the front part of the gas knife block, and the two independent nitrogen and argon simultaneously enter the mixed gas protection cavity of the gas knife block at a distance of 10mm in front of the outlet to be converged into a whole.
Preferably, the welding seam rear high-temperature region protective gas module is used for outputting nitrogen or argon.
The invention also provides a gas protection method for continuous laser welding, which adopts the gas protection device for continuous laser welding to protect the weld joint, and specifically comprises the following steps:
adjusting the position and the posture of the air knife block to enable an air outlet of the air knife block to be aligned to a welding seam, wherein the air knife block comprises a high-pressure air transverse blowing module at a laser welding position, a mixed shielding gas module at the laser welding position and a shielding gas module in a high-temperature area at the rear part of the welding seam;
controlling high-pressure air emitted by a high-pressure air transverse blowing module at the laser welding position to be used for transversely blowing the welding seam so as to blow away splashes at the welding position;
controlling a mixed shielding gas module at the laser welding position to emit high-pressure mixed gas to protect a welding seam molten pool;
controlling the protective gas module in the high-temperature area at the rear part of the welding seam to emit inert gas to protect the welding seam from being oxidized;
controlling an air knife cooling module to cool an air knife block;
and controlling the suction gas module to suck the welding seam.
The invention has the beneficial effects that: according to the gas protection device and the method for continuous laser welding, the position and the posture of the gas knife block are adjusted to enable the gas outlet of the gas knife block to be aligned to a welding seam, and specifically, high-pressure air emitted by a high-pressure air transverse blowing module at the laser welding position is controlled to be used for transversely blowing the welding seam to blow away splashes at the welding position; controlling a mixed shielding gas module at the laser welding position to emit high-pressure mixed gas to protect a welding seam molten pool; controlling the protective gas module in the high-temperature area at the rear part of the welding seam to emit inert gas to protect the welding seam from being oxidized; controlling an air knife cooling module to cool an air knife block; and controlling the suction gas module to suck the welding seam. The correct blowing and protection can effectively protect the weld pool from being reduced or even prevented from being oxidized; the splashing generated in the welding process is effectively reduced; the welding seam is uniformly spread when the welding seam molten pool is solidified, so that the welding seam is uniformly and beautifully formed; effectively reducing the shielding effect of the metal steam plume or the plasma cloud on the laser and increasing the effective utilization rate of the laser; effectively reducing weld pores.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of the gas shield apparatus for continuous laser welding of the present invention;
FIG. 2 is a left side view of the gas shield apparatus for continuous laser welding of the present invention;
FIG. 3 is a top view of the gas shield apparatus for continuous laser welding of the present invention;
fig. 4 is a schematic structural view of a structural air knife block of the gas shield apparatus for continuous laser welding of the present invention.
Description of reference numerals: 1. a laser welding head; 2. welding a welding head fixing plate; 3. an air draft module fixing block; 4. a Z-axis adjusting block of the air draft module; 5. an X-axis adjusting block of the air draft module; 6. a rotating shaft clamping block of the air draft module; 7. a wind suction barrel; 8. welding a workpiece; 9. roughly adjusting a plate in a Z axis of an air knife; 10. an air knife rotation adjusting device; 11. a transition plate; 12. an air knife Z-axis fine adjustment device; 13. a conversion plate; 14. roughly adjusting a plate in an X axis of an air knife; 15. an air knife X-axis fine adjustment device; 16. an air knife Y-axis fine adjustment device; 17. an air knife Y-axis transition plate; 18. roughly adjusting a plate along the Y axis of the air knife; 19. an air knife block connecting plate; 20. a pneumatic cutter block; 21. transversely blowing the sheet by using an air knife; 22. an air knife blows the chamber transversely.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The invention provides a gas protection device for continuous laser welding, which comprises a suction gas module, an air knife cooling module and an air knife protection module, wherein the air knife protection module comprises an air knife block, and the air knife block comprises a high-pressure air transverse blowing module at a laser welding position, a mixed protection gas module at the laser welding position and a high-temperature area protection gas module at the rear part of a welding seam; the laser welding device comprises a suction gas module, a laser welding position mixed protective gas module, a welding seam molten pool, a welding seam rear high-temperature area protective gas module, an air knife cooling module and a welding seam rear high-pressure air transverse blowing module, wherein the suction gas module is used for timely sucking the smoke and the splashes generated in the laser welding process, the laser welding position mixed protective gas module is used for protecting the welding seam molten pool, the welding seam rear high-temperature area protective gas module is used for protecting the welding seam from being oxidized, the laser welding position high-pressure air transverse blowing module is used for transversely blowing away the splashes at the welding position, meanwhile.
The mixed shielding gas module at the laser welding position can effectively protect a welding seam molten pool, reduce welding seam pores, reduce splashing generated in the welding process, promote the welding seam molten pool to be uniformly spread when being solidified, and enable the welding seam to be uniformly and attractively formed; the welding seam rear high-temperature region protective gas module can effectively reduce or even avoid the welding seam from being oxidized; the high-pressure air transverse blowing module at the laser welding position can effectively prevent and inhibit splashes from rising to the welding head, protects the welding head protective lens from being polluted, effectively reduces the shielding effect of metal steam plumes or plasma clouds on laser, and increases the effective utilization rate of the laser. The front cooling module and the rear cooling module of the air knife can effectively ensure that the device can work normally continuously for a long time, and particularly, the cooling function of the device is very important in high-power continuous welding operation. The suction gas module at the laser welding position can effectively and timely suck the smoke and the splash generated in the laser welding process, further reduces the risk of pollution of a welding head protective lens and the shielding effect of metal steam plume and plasma cloud on laser, and in a word, the protective device and the protective method have great improvement on weld forming, weld quality, weld penetration and weld width.
Wherein, convulsions module fixed block 3 is fixed on soldered connection fixed plate 2, through waist shape hole fixed connection between convulsions module Z axle adjusting block 4 and the convulsions module fixed block 3, can realize that convulsions section of thick bamboo 7 removes the adjustment along Z axle direction, convulsions module X axle adjusting block 5 passes through waist shape hole fixed connection with convulsions module Z axle adjusting block 4, can realize that convulsions section of thick bamboo 7 removes the adjustment along X axle direction, convulsions module rotation axis presss from both sides tight piece 6 and convulsions module X axle adjusting block 5 and comprises the semicircle, can realize that convulsions section of thick bamboo 7 removes the adjustment along Y axle direction and follows the rotatory adjustment of Y axle direction, this kind of composite set can realize that convulsions section of thick bamboo 7 removes the adjustment along X/Y/Z triaxial direction and the rotatory adjustment along the Y axle, the good gesture of adjustment convulsions section of thick bamboo 7 can improve suction smog effect greatly.
An air knife Z-axis rough adjusting plate 9 is connected with a welding head fixing plate 2 in an embedded mode, the air knife Z-axis rough adjusting plate 9 can move along the X axis, after the air knife Z-axis rough adjusting plate 9 moves to a certain position, the air knife Z-axis rough adjusting plate 14 locks the air knife Z-axis rough adjusting plate 9, the position of the air knife Z-axis rough adjusting plate and the position of the air knife X-axis rough adjusting plate are in a determined and fixed state, the air knife block 20 can move and roughly adjust along the X axis direction, the air knife block 20 can move and roughly adjust along the Z axis direction, the transition plate 11 realizes that the air knife rotary adjusting device 10 and the air knife Z-axis fine adjusting device 12 are fixedly connected, the conversion plate 13 realizes that the air knife Z-axis fine adjusting device 12 and the air knife X-axis fine adjusting device 15 are fixedly connected, the air knife Y-axis fine adjusting device 16, the air knife Y-axis transition plate 17, the air knife Y-axis rough adjusting plate, the air knife block connecting plate 19 is connected with the air knife Y-axis coarse adjustment plate 18 through a waist-shaped hole, the coarse adjustment of the movement of the air knife block 20 along the Y-axis direction can be realized, the air knife transverse blowing sheet 21, the air knife transverse blowing cavity 22 and the air knife block 20 are connected with each other to form a high-pressure air transverse blowing cavity, the combination device can realize the coarse adjustment of the movement of the air knife block 20 along the X/Y/Z three-axis direction, meanwhile, the fine movement adjustment of the air knife block 20 along the X/Y/Z three-axis direction and the fine rotation adjustment along the Y axis can be realized, the fine movement function in three directions is realized by a micro guide rail and a micro lead screw, the minimum adjustment amount can reach 0.1mm, the fine rotation adjustment is realized by a micro precise worm gear, the minimum adjustment amount can reach 1 degree, the multifunctional adjustment combined design device can meet the requirements of the multi-working-condition conditions of the welded parts, and the adaptability of the product is greatly improved.
The protection device and the protection method of the invention greatly improve the weld forming, the weld quality, the weld penetration and the weld width. The correct blowing and protection can effectively protect the weld pool from being reduced or even prevented from being oxidized; the correct air blowing and protection can effectively reduce the splashing generated in the welding process; the correct air blowing and protection can promote the weld pool to be uniformly spread when being solidified, so that the weld is uniformly and beautifully formed; the correct air blowing and protection can effectively reduce the shielding effect of metal steam plume or plasma cloud on the laser, and increase the effective utilization rate of the laser; the welding seam air holes can be effectively reduced through correct air blowing and protection, and the device can be guaranteed to normally work in a high-temperature environment for a long time through correct cooling.
The invention also provides a gas protection method for continuous laser welding, which comprises the following steps:
the air knife block 20 is designed to keep 45-degree inclination with a workpiece, firstly, the adjusting devices are fixed and locked in the rough movement adjusting direction of the X/Y/Z three-axis direction, then the bottom of the air knife block 20 is parallel to the welding surface or the welding seam of the welding workpiece 8 through the air knife rotation adjusting device 10, then the distance between the bottom of the air knife block 20 and the welding seam surface is adjusted to be 3-5 mm through the air knife Z-axis fine adjusting device 12, then the air knife Y-axis fine adjusting device 16 is adjusted to enable the red light spot of a welding head to be positioned on the central line of the air outlet of the air knife block 20, finally the air knife X-axis fine adjusting device 15 is adjusted to enable the center of the air blowing port at the forefront end of the air knife block 20 to be superposed with the red light spot of the welding head, after the position of the welding head block 20,
a first path of gas: the high-pressure air transverse blowing module at the laser welding position emits air, the working pressure of the air is not lower than 0.5MPA, the air is connected to the air inlet of the '20 air knife block' through an air pipe, a high-pressure air cavity is filled instantly, and then the air is ejected at high speed and high pressure from a 0.1mm gap between the air knife transverse blowing sheet 21 and the air knife transverse blowing cavity 22, so that an invisible high-pressure air curtain is formed, welding spatters can be effectively prevented and restrained from penetrating or rising, a good protection effect is achieved on a welding joint protection lens, meanwhile, the air curtain can blow off metal steam plumes or plasma clouds above the welding position, the shielding effect of the metal steam plumes or the plasma clouds on laser is effectively reduced, and the effective utilization rate of the laser is increased.
And (3) second path of gas: the mixed shielding gas emitted by the mixed shielding gas module at the laser welding position is mainly determined by the material of a workpiece to be welded and the material of stainless steel and common carbon steel, the used proportion has certain difference, most places use nitrogen and argon for mixing, the working pressure of the mixed gas is not lower than 0.5MPA, the working flow is approximately 20L/Min, the mixed gas is connected to the inlets of two mixed gas channels of the air knife block 20 through a gas pipe, the two mixed gas channels are independent at the front part of the air knife block 20, when the two independent mixed gas channels are in the position 10mm away from the outlet, the mixed gas channels simultaneously enter the mixed gas protection cavity of the air knife block 20 and are converged into a whole, so that the whole laser welding position can be protected, a welding seam melting bath is protected, welding seam air holes are reduced, energy efficiency splashing is reduced in the welding process, and the welding seam melting bath is enabled to be uniformly spread when being solidified, so that the weld joint is formed uniformly and beautifully.
A third path of gas: pure shielding gas emitted by a shielding gas module of a high-temperature area at the rear part of a welding seam, the pure shielding gas mainly depends on the material of a welded workpiece, the shielding gas used by different materials has certain difference, nitrogen or argon is used in most places, the working pressure of the mixed gas is not lower than 0.5MPA, the working flow is about 25L/Min, the pure shielding gas module is connected to four pure shielding gas inlets of the air knife block 20 through gas pipes, the four pure shielding gas channels are independent at the front part of the air knife block 20, when the four independent pure shielding gases are in the position 10mm away from the outlet, the pure shielding gases simultaneously enter a pure shielding gas protection cavity of the air knife block 20 and are converged into a whole, so that the high-temperature area of the welding seam after welding can be protected, and the welding seam can be effectively reduced or even prevented from being oxidized.
In addition, at the outlet of the air knife block 20, a mixed merging area of the second path air and the third path air is formed, and the protective gas in the area can protect the surface oxidation and the formation of the welding seam.
And a fourth path: the front end cooling water circulating water and the rear end cooling water circulating water are independently recycled and cooled, the air knife block 20 is very close to the laser welding position, the temperature of the area is high, the air knife block 20 is extremely easy to be affected by laser welding to cause overhigh temperature, especially for continuous welding for more than 10 hours, the cooling function is particularly important, and the influence of the high-temperature environment outside the air knife block 20 can be ensured through the two paths of cooling water circulating water.
And a fifth path: the suction air module generates suction negative pressure on the surface of a workpiece to form a suction air path, when high-pressure air, mixed shielding gas, pure shielding gas and a cooling water path are adjusted to be prepared, the suction air path is adjusted finally, the bottom of the exhaust funnel 7 is approximately level with the air knife block 20, the suction air path and the shielding gas are approximately symmetrical relative to the central line of a welding head, and the laser welding processing part is sucked in the welding process, so that splashing and harmful gas generated by welding can be effectively and rapidly sucked away, in addition, substances having shielding effect on laser such as metal steam plume, plasma cloud and the like above the welding part can be further absorbed, and the stability and the regionality of shielding gas at the welding part can be greatly improved by adjusting the sizes of the first path and the second path of shielding gas and the size of the fifth path of suction gas.
The scheme is mainly applied to the petroleum pipeline industry, the pressure vessel industry and the large-scale plate laser tailor-welding industry, the advantages of the method can be well displayed particularly on long welding seams or continuous welding seams, the welding seams can be effectively protected, the welding surface can be more uniformly formed, meanwhile, the welding surface can be free of oxidation or obvious oxidation, the protection method and the device can protect the continuous welding seams with the length of 6000 meters at the present stage, along with the requirements of users and customers, the protection method and the device can protect the continuous welding seams with the length of more than ten thousand meters, and the method and the device have very important contribution to petroleum transportation and oil field exploitation pipelines.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A gas-shielding device for continuous laser welding, characterized by: the device comprises a suction gas module, an air knife cooling module and an air knife protection module, wherein the air knife protection module comprises an air knife block, and the air knife block comprises a high-pressure air transverse blowing module at a laser welding position, a mixed protection gas module at the laser welding position and a high-temperature area protection gas module at the rear part of a welding seam;
the laser welding device comprises a suction gas module, a laser welding position mixed protective gas module, a welding seam molten pool, a welding seam rear high-temperature area protective gas module, an air knife cooling module and a welding seam rear high-pressure air transverse blowing module, wherein the suction gas module is used for timely sucking the smoke and the splashes generated in the laser welding process, the laser welding position mixed protective gas module is used for protecting the welding seam molten pool, the welding seam rear high-temperature area protective gas module is used for protecting the welding seam from being oxidized, the laser welding position high-pressure air transverse blowing module is used for transversely blowing away the splashes at the welding position, meanwhile.
2. The gas-shielding device for continuous laser welding according to claim 1, characterized in that: the air suction module comprises an air draft module fixing block, an air draft module Z-axis adjusting block, an air draft module X-axis adjusting block, an air draft module rotating shaft clamping block and an air draft tube;
the exhaust fan barrel is connected with the exhaust module fixing block through a welding head, the exhaust module Z-axis adjusting block is fixedly connected with the exhaust module fixing block to realize Z-axis movement, the exhaust module X-axis adjusting block is fixedly connected with the exhaust module Z-axis adjusting block to realize X-axis direction movement, and the exhaust module rotating shaft clamping block is fixedly connected with the exhaust module X-axis adjusting block to realize Y-axis direction rotation regulation.
3. The gas-shielding device for continuous laser welding according to claim 2, characterized in that: and the air draft module Z-axis adjusting block, the air draft module X-axis adjusting block and the air draft module rotating shaft clamping block are fixedly connected through the waist-shaped hole in sequence.
4. The gas-shielding device for continuous laser welding according to claim 1, characterized in that: the air knife protection module comprises a three-axis holder for driving the air knife block to adjust the posture, and the welding line is located in the blowing track of the air knife block.
5. The gas-shielding device for continuous laser welding according to claim 4, characterized in that: the three-axis holder adopts a screw rod driving structure, the moving precision of the three-axis holder is 0.1mm, and the rotating precision is 1 degree.
6. The gas-shielding device for continuous laser welding according to claim 1, characterized in that: the high-pressure air transverse blowing module at the laser welding position is used for blowing air to the welding seam, the working pressure of the air is not lower than 0.5MPA, and the air transverse blowing module is connected to an air inlet of the air knife block through an air pipe.
7. The gas-shielding device for continuous laser welding according to claim 1, characterized in that: the laser welding part mixed protective gas module is used for mixing nitrogen and argon, the working pressure of the mixed gas is not lower than 0.5MPA, and the working flow is 20L/Min.
8. The gas-shielding device for continuous laser welding according to claim 7, characterized in that: the nitrogen and the argon are respectively connected to the inlets of the two mixed gas channels of the gas knife block through gas pipes, the two mixed gas channels are independent at the front part of the gas knife block, and the two independent nitrogen and argon simultaneously enter the mixed gas protection cavity of the gas knife block at the position 10mm away from the outlet to be converged into a whole.
9. The gas-shielding device for continuous laser welding according to claim 1, characterized in that: and the welding seam rear high-temperature area protective gas module is used for outputting nitrogen or argon.
10. A gas protection method for continuous laser welding, characterized in that the gas protection device for continuous laser welding according to any one of claims 1 to 9 is used for protecting a weld joint, and comprises the following steps:
adjusting the position and the posture of the air knife block to enable an air outlet of the air knife block to be aligned to a welding seam, wherein the air knife block comprises a high-pressure air transverse blowing module at a laser welding position, a mixed shielding gas module at the laser welding position and a shielding gas module in a high-temperature area at the rear part of the welding seam;
controlling high-pressure air emitted by a high-pressure air transverse blowing module at the laser welding position to be used for transversely blowing the welding seam so as to blow away splashes at the welding position;
controlling a mixed shielding gas module at the laser welding position to emit high-pressure mixed gas to protect a welding seam molten pool;
controlling the protective gas module in the high-temperature area at the rear part of the welding seam to emit inert gas to protect the welding seam from being oxidized;
controlling an air knife cooling module to cool an air knife block;
and controlling the suction gas module to suck the welding seam.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112894058A (en) * | 2021-01-27 | 2021-06-04 | 池仁尧 | Energy-saving welding platform for tin soldering of new energy storage battery |
| CN113977085A (en) * | 2021-11-23 | 2022-01-28 | 联德电子科技(常熟)有限公司 | Metal plate sealing and welding method |
| CN114346490A (en) * | 2021-09-10 | 2022-04-15 | 苏州创鑫激光科技有限公司 | Gas conveying method in air-cooled laser processing equipment and application thereof |
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| CN113977085A (en) * | 2021-11-23 | 2022-01-28 | 联德电子科技(常熟)有限公司 | Metal plate sealing and welding method |
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