CN116275504A - Coaxial protection device for laser welding and manufacturing method thereof - Google Patents
Coaxial protection device for laser welding and manufacturing method thereof Download PDFInfo
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- CN116275504A CN116275504A CN202310333493.XA CN202310333493A CN116275504A CN 116275504 A CN116275504 A CN 116275504A CN 202310333493 A CN202310333493 A CN 202310333493A CN 116275504 A CN116275504 A CN 116275504A
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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
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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
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention belongs to the technical field of laser welding, and discloses a coaxial protection device for laser welding and a manufacturing method thereof, wherein a laser light-passing hole is formed in the middle of an integral structure, and the upper end of the outer side of the laser light-passing hole is provided with threads; the protecting gas cavity is positioned at the outer side of the laser light-passing hole, and a micro-truss structure is filled in the protecting gas cavity and used for enabling the protecting gas to form turbulence in the cavity and accelerating the diffusion of the protecting gas; the outlet of the lower end of the protective gas cavity is provided with a spiral nozzle, and the outside of the protective gas cavity is connected with a protective gas inlet. The invention is designed and manufactured based on the laser powder bed melting technology, can realize more complex structure forming without losing the protection effect of the device on the welding area, has smaller volume, lighter weight and faster manufacturing speed, and the internal filling micro-truss structure can improve the structural strength, reduce the thermal stress deformation in the manufacturing process, improve the manufacturing precision, guide the shielding gas to form turbulence in the cavity and accelerate the gas diffusion.
Description
Technical Field
The invention belongs to the technical field of laser welding, and particularly relates to a coaxial protection device for laser welding and a manufacturing method thereof.
Background
At present, the welding protection nozzle is a device for directly delivering protective gas to the surface of a workpiece during laser welding, so that surrounding air is blown off, the effect of preventing a welding line from carrying out chemical reaction with polluted gas such as nitrogen, oxygen and the like and forming effective protection on a molten pool and a nearby high-temperature area is achieved, meanwhile, the protective gas can play a role of blowing off and controlling plasma, and the energy input in the welding process is more stable.
The welding protection nozzle can be roughly divided into a closed protection type, a paraxial protection type and a coaxial protection type according to the protection mode. For example, chinese patent CN218341237U discloses a coaxial protection device for laser welding, which is assembled by a plurality of parts, and a gas uniform component is disposed in the accommodating cavity, so as to achieve the effect of improving the uniform distribution of gas, and the protection gas outlets are a plurality of groups of round holes with sequentially reduced circumferential distribution. Chinese patent CN212043126U discloses a laser welding airtight blowing protection device, which protects a box cover on a workpiece surface by moving a lifting column, and forms an inert gas field in an airtight environment by blowing gas into the protection box during operation.
In summary, because the size of the closed box is limited, the requirement on the shape and size of the workpiece is high, and the whole welding process is complex, so that the closed box is not suitable for industrial production. The paraxial protective device conveys inert gas at a certain angle in the lateral direction of the laser beam, has good protective effect on unidirectional welding, but can cause uneven distribution of protective gas on the surface of a welding line when the unidirectional welding is performed. The coaxial protection device is convenient to operate, the angle between the welding protection nozzle and the laser beam does not need to be adjusted, the gas protection nozzle is always in a coaxial state with the laser beam, the protection gas can act on the surface of the workpiece with the same angle with the laser beam, the protection effect cannot be influenced by direction change, and the welding requirement on complex molded surfaces can be met. However, the coaxial protection device of the traditional manufacturing method has larger volume and mass, and influences the welding path planning. Generally, the structure is simplified for manufacturability, and the protection performance is reduced.
Through the above analysis, the problems and defects existing in the prior art are as follows: the traditional coaxial protection device has larger volume and mass, influences the welding path planning and has lower protection performance.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a coaxial protection device for laser welding and a manufacturing method thereof.
The present invention is achieved by a coaxial protection device for laser welding, comprising:
a laser light-passing hole and a protective gas chamber;
the laser light transmission hole is formed in the middle of the integral structure and used for welding laser to pass through, and the upper end of the outer side of the laser light transmission hole is provided with threads;
the protecting gas cavity is positioned at the outer side of the laser light-passing hole, and a micro-truss structure is filled in the protecting gas cavity and used for enabling the protecting gas to form turbulence in the cavity and accelerating the diffusion of the protecting gas;
the lower end outlet of the shielding gas chamber is provided with a spiral nozzle, and the outside of the shielding gas chamber is connected with a shielding gas inlet.
Further, the wall surface of the chamber is conical, a spiral nozzle is arranged at the outlet of the lower end of the shielding gas chamber, and the shielding gas chamber is externally connected with a shielding gas inlet.
In order to ensure the printing precision of additive manufacturing, the included angle between the wall surface and the horizontal plane is 70 degrees, the thickness of the wall surface except the threaded connection part is 0.9mm,
the spiral nozzle at the outlet of the shielding gas chamber adopts a 180-degree opposite double-spiral structure.
The pitch of the spiral nozzle is 14.5mm, and the height is 14.5mm.
The protection gas inlet interfaces are four in number, and the four protection gas inlet interfaces are uniformly distributed in circumferential equidistance.
In order to ensure the printing precision of additive manufacturing, the spiral nozzle at the outlet of the shielding gas chamber forms an angle of 40 degrees with the plane of the outlet.
The wall surface of the protection air cavity is conical, and the distance between the outlets is 5mm.
The shielding gas inlet interface is positioned at the top of the shielding gas cavity, the diameter of the shielding gas inlet interface is 5mm, and the included angle between the shielding gas inlet interface and the horizontal plane is 45 degrees.
Further, the thickness of the wall surface of the coaxial protection device for laser welding except the threaded connection part is 0.7mm.
Further, the spiral nozzle at the outlet of the shielding gas chamber adopts a 180-degree opposite double-spiral structure.
Further, the pitch of the spiral nozzle is 16mm, and the height is 16mm.
Further, the four protection gas inlet interfaces are arranged in total, and the four protection gas inlet interfaces are uniformly distributed in circumferential direction at equal intervals.
Further, the spiral nozzle at the outlet of the shielding gas chamber forms an angle of 30 degrees with the plane of the outlet.
Further, the wall surface of the protection air cavity is arc-shaped, and the distance between the outlets is 5mm.
Further, the shielding gas inlet interface is positioned at the top of the shielding gas cavity, the diameter of the shielding gas inlet interface is 5mm, and the included angle between the shielding gas inlet interface and the horizontal plane is 45 degrees.
Another object of the present invention is to provide a method for manufacturing a coaxial protector for laser welding, comprising:
the first step is to add printing support to the coaxial protection device model for laser welding by Materialise Magics software, and adopt laser powder bed melting (LPBF) technology for printing and forming, the material is 316L, the thickness of the powder layer is 30 mu m, the laser power is 180W, and the scanning speed is 1000mm/s.
And secondly, cutting the formed piece from the substrate by adopting a linear cutting machine tool, and removing the residual support.
And thirdly, carrying out surface treatment on the coaxial protection device, and cleaning adhered powder particles.
And fourthly, machining threads and shaft sleeves on the coaxial protection device according to the assembly mode and the size of the laser welding head.
In combination with the technical scheme and the technical problems to be solved, the technical scheme to be protected has the following advantages and positive effects:
first, the coaxial blowing protection device provided by the invention is designed and manufactured based on the laser powder bed melting technology, so that more complex structure forming can be realized, and the structure is not required to be simplified, so that the protection effect of the device on a welding area is not lost. Smaller volume, lighter weight and faster manufacturing speed. The Laser Powder Bed Fusion (LPBF) technology has the limitation of structure forming angle when forming, and the coaxial blowing protection device provided by the invention can not be internally added with support when printing and forming, and the internal filling micro-truss structure can not only improve the structural strength, but also reduce the thermal stress deformation in the manufacturing process, improve the manufacturing precision, guide the shielding gas to form turbulence in the cavity and accelerate the gas diffusion. The protection gas outlet adopts 180 DEG to arrange the spiral nozzles, so that the gas protection range can be improved.
Secondly, the invention can exert the protection effect of the coaxial blowing protection device to the greatest extent, and realize the manufacture of the coaxial blowing protection device with a complex structure. The micro-truss structure is filled in the device, so that gas diffusion can be accelerated.
Thirdly, as inventive supplementary evidence of the claims of the present invention, the following important aspects are also presented:
(1) The expected benefits and commercial values after the technical scheme of the invention is converted are as follows:
the coaxial blowing protection device structure provided by the invention is obtained optimally based on the simulation calculation result, the protection effect can be maximized, compared with the traditional milling and casting processing mode, the device provided by the invention can be integrally formed by utilizing the laser powder bed melting technology, the manufacturing speed is higher, the yield is high, the post-treatment steps are simple, and the manufacturing cost is saved.
(2) Whether the technical scheme of the invention solves the technical problems that people want to solve all the time but fail to obtain success all the time is solved:
the suspension structure manufactured by the laser powder bed fusion technology has forming angle limitation, the support added in the coaxial blowing protection device cannot be removed, and meanwhile, the support structure is dense, so that the conveying of the protection gas can be blocked. According to the technical scheme, the micro-truss structure is added into the cavity, so that the forming angle limit of the laser powder bed melting technology is broken through, meanwhile, the shielding gas is guided to form turbulence in the cavity, and gas diffusion is accelerated.
Drawings
Fig. 1 is a schematic structural view of a coaxial protection device for laser welding according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a structure of a spiral nozzle according to an embodiment of the present invention;
fig. 4 and fig. 5 are diagrams of simulation results of the relationship between the effective protection range of the coaxial blowing protection device and the distance between workpieces according to the embodiment of the invention;
FIG. 6 is a diagram showing the protective effect of the linear laser welding of the titanium alloy provided by the embodiment of the invention, and a-f in FIG. 6 are the welding effects when the air outlet of the invention is 5mm, 10mm, 15mm, 20mm, 25mm and 30mm away from the surface of the workpiece respectively;
fig. 7 is a diagram comparing the protection effect of the curve laser welding titanium alloy with the protection effect of the paraxial welding provided by the embodiment of the invention, a in fig. 7 is a diagram of the welding result of the paraxial blowing protection device, and b in fig. 7 is a diagram of the welding result of the coaxial blowing protection device provided by the invention;
in the figure: 1. a light-transmitting hole; 2. a shielding gas chamber; 3. a micro-truss structure; 4. a spiral nozzle; 5. the shielding gas is introduced into the interface.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, the inner layer structure of the coaxial protection device for laser welding provided by the embodiment of the invention is a laser light hole 1, the outer layer structure is a protection gas chamber 2, the interior of the protection gas chamber 2 is filled with a micro-truss structure 3, a spiral nozzle 4 is arranged at the outlet of the protection gas chamber 2, and four protection gas inlet interfaces 5 are connected to the exterior of the protection gas chamber 2.
According to the specific size of the laser welding head and the connecting method, the screw thread at the top of the coaxial protecting device for laser welding is directly connected to the laser welding head, or the middle shaft sleeve is connected to the screw thread at the top of the coaxial protecting device, and then the shaft sleeve is connected to the laser welding head.
The hose is connected to the air outlet of the protective gas cylinder or the protective gas control device, the other end of the hose is connected to the diverter, the protective gas flow is divided into two parts, and the two parts are connected to the other two hoses. And the two divided hoses are respectively connected with a splitter, the protective air flow is divided into four parts and is respectively connected with the four hoses, and finally the four hoses are connected with four protective air inlets outside the protective air chamber of the coaxial protective device for laser welding. Opening the protective gas of the laser welding head and the protective gas adjusting device or the gas cylinder of the coaxial protective device, and adjusting the protective gas flow of the laser welding head and the protective gas cavity of the coaxial protective device to enable the gas flow to reach an ideal state.
In order to reduce the volume of the coaxial blowing protection device, the thickness of the wall surface except the threaded connection part is 0.7mm, and the coaxial blowing protection device is formed by adopting a laser powder bed melting (LPBF) technology.
In order to make the shielding gas spread evenly in the chamber, four shielding gas inlet ports 5 are used. Meanwhile, the micro-truss structure 3 is filled in the protective gas chamber 2, and the micro-truss structure can play roles of supporting and accelerating gas diffusion, so that the protective gas forms turbulence in the chamber, the diffusion of the protective gas is accelerated, the strength of the device is improved, the formability of the coaxial blowing protective device during additive manufacturing is improved, and the forming precision is improved.
In order to improve the diffusion effect of the shielding gas at the outlet, the spiral nozzle 4 of the shielding gas chamber 2 adopts a double-spiral structure with 180 degrees opposite to each other, the pitch is 16mm, and the height is 16mm.
In order to improve the size and the protection effect of the gas protection area, the spiral nozzle 4 at the outlet of the protection gas chamber 2 and the plane of the outlet form an angle of 30 degrees through numerical simulation calculation.
The device upper portion outside is the helicitic texture, can match the axle sleeve or connect to the laser welding head directly on, can provide the shielding gas simultaneously with the protection air cavity during operation for protect the work piece surface and blow off plasma protection laser lens.
The device protects the wall surface of the air cavity to be arc-shaped, and the distance between the outlets is 5mm. The shielding gas inlet interface is positioned at the top of the shielding gas cavity, the diameter of the shielding gas inlet interface is 5mm, and the included angle between the shielding gas inlet interface and the horizontal plane is 45 degrees.
The upper part of the coaxial protection device for laser welding provided by the embodiment of the invention is provided with threads and is used for being matched with a shaft sleeve or directly connected to a laser welding head; the hose is used for connecting the protective gas inlet port with the protective gas bottle or the protective gas control device to realize the communication of the protective gas.
The coaxial protection device for laser welding and the CO2 laser provided by the invention are used for carrying out a titanium alloy laser welding experiment. One end of the shaft sleeve is connected with the external thread on the device provided by the invention, and the other end of the shaft sleeve is connected with the laser welding head, so that the laser beam and the protection nozzle are in a coaxial state, and the laser hole of the device can be filled with laser and the protection gas of the laser welding head. The 4 protective gas inlets of the outer protective gas chamber are connected with a gas pipeline with the size of phi 5mm, and the terminal is used for conveying protective gas for a pneumatic bottle filled with argon. The welding experiment platform device is provided with a pressing plate for pressing the titanium alloy plate, and bolts for connecting the pressing plate with the experiment platform are screwed tightly, so that the titanium alloy plate is fixed on the workbench. The plate is prevented from being deformed by heating in the welding process, so that the welding dislocation phenomenon is caused.
Example 1:
in order to prove the advancement of the protection scope of the invention, an area with the oxygen content lower than 0.2% on the surface of the workpiece during welding is defined as an effective protection area, the effective protection scope of the protection nozzle and the workpiece under different distances is calculated by using Fluent software, and the average diameter in the effective protection scope is defined as the effective protection length. The protective gas is argon with the purity of 99.99 percent, and the flow rates of the inner layer gas and the outer layer gas are respectively 10L/min and 20L/min. The simulation process is shown in fig. 4, and the simulation result is shown in fig. 5, so that the optimal protection effect of 23.4mm can be achieved when the nozzle is 10mm away from the workpiece.
Example 2:
in order to prove the advancement of the protection scope of the invention, a printed double-layer coaxial protection nozzle and a CO2 laser are used for carrying out a titanium alloy linear single-pass laser welding experiment, and the influence of the protection nozzle on the weld morphology is analyzed by changing the distance between the protection nozzle and a workpiece. One end of the shaft sleeve is connected with the external thread on the device provided by the invention, and the other end of the shaft sleeve is connected with the laser welding head, so that the laser beam and the protection nozzle are in a coaxial state, and the laser hole of the device can be filled with laser and the protection gas of the laser welding head. The 4 air inlet openings of the outer layer protection nozzle are connected with a gas pipeline with the size of phi 5mm, and the terminal is used for conveying protection gas for a pneumatic bottle filled with argon. The laser power is 600w, the welding speed is 2m/min, the defocusing amount is +1mm, and the inner layer gas flow and the outer layer gas flow are respectively 10L/min and 20L/min. The distances between the protective nozzle workpieces were 5mm, 10mm, 15mm, 20mm, 25mm and 30mm, respectively. As shown in FIG. 6, the welding seam should be silvery white, faint yellow and the blue protective effect is worst when the protective effect is best, and it can be seen that the actual welding effect is consistent with the trend of the simulation calculation result, and the optimal protective effect can be achieved when the air outlet is 10mm away from the surface of the workpiece.
Example 3:
in order to prove the advancement of the invention compared with other structures, the novel coaxial blowing protection device and the paraxial blowing protection device are subjected to comparative welding experiments. And (3) carrying out titanium alloy laser welding by adopting a CO2 laser, wherein the welding bead is a circle with the diameter of 40 mm. One end of the shaft sleeve is connected with the external thread on the device provided by the invention, and the other end of the shaft sleeve is connected with the laser welding head, so that the laser beam and the protection nozzle are in a coaxial state, and the laser hole of the device can be filled with laser and the protection gas of the laser welding head. The 4 air inlet openings of the outer layer protection nozzle are connected with a gas pipeline with the size of phi 5mm, and the terminal is used for conveying protection gas for a pneumatic bottle filled with argon. The laser power is 600w, the welding speed is 2m/min, the defocusing amount is +1mm, the inner layer gas flow and the outer layer gas flow are respectively 10L/min and 20L/min, and the distance between the protective nozzle workpieces is 10mm. Test results as shown in fig. 7, when the bypass protection nozzle is used for welding protection, the output direction of the protection gas cannot adapt to the change of the machining direction, so that the surface of the welding seam of the workpiece is oxidized unevenly, and the color of the welding seam is changed from silvery white to yellow and blue. The coaxial blowing protection device provided by the invention can be used for well protecting a welding pool and a high-temperature area all the time while changing the welding direction, the surface of a welding seam is free from oxidation, the color of the welding seam is silvery white, and the quality of the welding seam is good.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used merely for convenience in describing the present invention and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (10)
1. The coaxial protection device for laser welding is characterized by comprising a laser light through hole and a protection gas cavity;
the laser light transmission hole is formed in the middle of the integral structure and used for welding laser to pass through, and the upper end of the outer side of the laser light transmission hole is provided with threads;
the protecting gas cavity is positioned at the outer side of the laser light-passing hole, and a micro-truss structure is filled in the protecting gas cavity and used for enabling the protecting gas to form turbulence in the cavity and accelerating the diffusion of the protecting gas;
the lower end outlet of the shielding gas chamber is provided with a spiral nozzle, and the outside of the shielding gas chamber is connected with a shielding gas inlet.
2. The coaxial protector for laser welding according to claim 1, wherein the wall surface of the chamber is tapered;
in order to ensure the printing precision of additive manufacturing, the included angle between the wall surface and the horizontal plane is 70 degrees, and the thickness of the wall surface except the threaded connection part is 0.9mm;
the spiral nozzle at the outlet of the protective gas chamber adopts a 180-degree opposite double-spiral structure;
the screw pitch of the spiral nozzle is 14.5mm, and the height of the spiral nozzle is 14.5mm;
the four protection gas inlet interfaces are axially and uniformly distributed at equal intervals.
3. The coaxial protection device for laser welding according to claim 1, wherein the spiral nozzle at the outlet of the protection gas chamber forms an angle of 40 ° with the plane of the outlet in order to ensure printing accuracy of additive manufacturing;
the wall surface of the protection air cavity is conical, and the distance between the outlets is 5mm;
the protective gas inlet interface is positioned at the top of the protective gas cavity, the diameter of the protective gas inlet interface is 5mm, and the included angle between the protective gas inlet interface and the horizontal plane is 45 degrees;
the thickness of the wall surface of the coaxial protection device for laser welding except the threaded connection part is 0.7mm;
the spiral nozzle at the outlet of the shielding gas chamber adopts a 180-degree opposite double-spiral structure.
4. A coaxial protector for laser welding according to claim 3, characterized in that the pitch of the spiral nozzle is 16mm and the height is 16mm.
5. The coaxial protection device for laser welding according to claim 1, wherein four protection gas inlet ports are provided, and the four protection gas inlet ports are axially and equidistantly and uniformly distributed.
6. The coaxial protection device for laser welding according to claim 1, wherein the spiral nozzle at the outlet of the shielding gas chamber is at an angle of 30 ° to the plane of the outlet.
7. The coaxial protector for laser welding according to claim 1, wherein the wall surface of the protective air chamber is arc-shaped, and the distance between the outlets is 5mm.
8. The coaxial protector for laser welding according to claim 1, wherein the shielding gas inlet is located at the top of the shielding gas chamber, has a diameter of 5mm, and forms an angle of 45 ° with the horizontal plane.
9. A method for manufacturing the coaxial protector for laser welding according to any one of claims 1 to 8, characterized by comprising:
adding a printing support to a coaxial protection device model for laser welding by using Materialise Magics software, printing and forming by adopting a laser powder bed melting (LPBF) technology, wherein the material is 316L, the thickness of a powder layer is 30 mu m, the laser power is 180W, and the scanning speed is 1000mm/s;
cutting the formed piece from the substrate by adopting a linear cutting machine tool, and removing residual supports;
thirdly, carrying out surface treatment on the coaxial protection device, and cleaning adhered powder particles;
and fourthly, machining threads and shaft sleeves on the coaxial protection device according to the assembly mode and the size of the laser welding head.
10. A laser welding apparatus, wherein the laser welding apparatus is provided with the coaxial protection device for laser welding according to any one of claims 1 to 8.
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| CN202310333493.XA CN116275504A (en) | 2023-03-31 | 2023-03-31 | Coaxial protection device for laser welding and manufacturing method thereof |
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| CN202310333493.XA CN116275504A (en) | 2023-03-31 | 2023-03-31 | Coaxial protection device for laser welding and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117047268A (en) * | 2023-07-19 | 2023-11-14 | 南京宇众自动化装备有限公司 | Welding equipment and pressure head assembly thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117047268A (en) * | 2023-07-19 | 2023-11-14 | 南京宇众自动化装备有限公司 | Welding equipment and pressure head assembly thereof |
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