Adjustable coaxial blowing device for laser welding

Abstract

The utility model discloses an adjustable coaxial blowing device for laser welding, which comprises a coaxial blowing base, a connecting ring arranged on the periphery of the coaxial blowing base, a coaxial blowing cylinder arranged on one side of the connecting ring, a height adjusting ring arranged on one side of the coaxial blowing cylinder, a copper nozzle connecting block arranged on one side of the height adjusting ring, and a coaxial blowing nozzle arranged on one side of the copper nozzle connecting block. A first O-shaped sealing ring is embedded in the upper surface of the coaxial blowing base, one side of the coaxial blowing base is connected with an L-shaped threaded quick plug, and an upper suction block is embedded in the lower surface of the coaxial blowing base. The problems that paraxial blowing protection is poor in protection effect on a welding seam with large splashing and the consumption of a protection lens is large are solved, and the device is simple in structure, easy to machine and convenient to operate and use.

Description

Technical Field

[0001] The utility model relates to the field of laser welding, in particular to an adjustable coaxial air blowing device for laser welding. Background Art

[0002] Laser welding is one of the most widely used high-energy beam welding methods. It has many advantages, such as high automation, high production efficiency, small welding deformation, narrow heat-affected zone, and large aspect ratio. It has been widely used in many industries, such as automobiles, aerospace, electronic communications, etc. Gas protection is one of the key factors affecting the quality of laser welding. During the laser welding process, it can protect the molten pool on the one hand, prevent the weld from being polluted by air and causing defects and weld oxidation. On the other hand, it can dissipate the plasma generated during high-power laser welding and protect the optical lens in the laser head from being contaminated by metal vapor and molten droplet splashes, which plays an important role in the welding process. Commonly used gas protection methods include side-axis gas blowing protection and coaxial gas blowing protection. Side-axis gas blowing protection is to blow the shielding gas to the weld at a certain angle through an additional device. Coaxial gas blowing protection is to make the shielding gas nozzle and the light beam coaxial, and the shielding gas and the light beam blow to the weld at the same angle. The side-axis air blowing protection device is usually simple in structure and easy to implement, so it is widely used. However, due to the fixed angle of the shielding gas, it can only fully protect one direction during welding. Therefore, it has a good protective effect on linear welds. However, when laser welding galvanized sheets, due to the presence of surface zinc, the surface spatter during laser welding is larger than that of ordinary sheets. When side-axis gas protection is used, it is very easy to cause contamination and damage to the welding head protection lens. Coaxial air blowing protection solves the above problems very well and can fully protect the weld. When the laser welding spatter of galvanized sheets is large, the coaxial air nozzle has a small opening, which reduces the possibility of spatter flying to the welding head, and has a good protective effect on the laser weld and the welding head protection lens, but the structure is usually more complicated and the cost is higher.

[0003] In the process of mechanical processing, errors are everywhere in the coaxial air blowing device, ranging from small errors caused by mechanical parts processing to large errors caused by the assembly process. Errors will not only cause the laser beam to deviate from the set angle and affect the focal position, but also cause the focus generated by the laser beam to deviate from the nozzle axis. There may even be part of the laser beam directly irradiated on the nozzle, causing it to melt, which will have great adverse consequences on the strength and appearance of the weld spot, thus causing product performance degradation and scrapping. Utility Model Content

[0004] In view of the problems in the related technology, the utility model proposes an adjustable coaxial air blowing device for laser welding to overcome the above technical problems existing in the existing related technology.

[0005] To this end, the specific technical solutions adopted by the utility model are as follows:

[0006] An adjustable coaxial air blowing device for laser welding comprises a coaxial air blowing base 1, a connecting ring is arranged on the periphery of the coaxial air blowing base 1, a coaxial air blowing cylinder is arranged on one side of the connecting ring, a height adjustment ring is arranged on one side of the coaxial air blowing cylinder, a copper nozzle connecting block is arranged on one side of the height adjustment ring, and a coaxial air blowing nozzle is arranged on one side of the copper nozzle connecting block.

[0007] Furthermore, a first O-ring is embedded in the upper surface of the coaxial blowing base 1 , an L-shaped threaded quick connector is connected to one side of the coaxial blowing base 1 , and an upper suction block is embedded in the lower surface of the coaxial blowing base 1 .

[0008] Furthermore, a mounting through hole is provided inside the coaxial blowing base 1 , and an annular boss is provided on the upper surface of the coaxial blowing base 1 .

[0009] Furthermore, an adjusting screw is threadedly connected inside the connecting ring.

[0010] Furthermore, a second O-ring is embedded in the upper surface of the coaxial air cylinder, a lower suction block is installed inside the coaxial air cylinder, and anti-collision screws are arranged on the periphery of the lower suction block.

[0011] Furthermore, the copper nozzle connecting block is threadedly connected to the coaxial air blowing nozzle.

[0012] The beneficial effects of the utility model are:

[0013] (1) The utility model improves the prior art. In actual use, a simple coaxial air blowing protection device is designed to solve the problems of poor protection effect of side-axis air blowing protection for welds with large spatter and large consumption of protection lenses. The utility model has a simple structure, is easy to process, and is easy to operate and use.

[0014] (2) In actual use, it is easy to screw. The coaxial air blowing nozzle has a small opening, which reduces the impact of spatter on the laser welding head during laser welding. The material is made of copper, which has a high melting temperature and has less adhesion when the welding slag is splashed, thus avoiding the impact of the welding slag splash on the copper nozzle. The copper nozzle can be replaced in time after it is damaged, which is easy to operate and avoids the impact on other parts of the coaxial air blowing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the main structure of an adjustable coaxial air blowing device for laser welding according to an embodiment of the utility model;

[0017] Figure 2 It is a stereoscopic diagram of an adjustable coaxial air blowing device for laser welding according to an embodiment of the utility model.

[0018] Figure 3 It is a structural schematic diagram of a coaxial air blowing base 1 in an adjustable coaxial air blowing device for laser welding according to an embodiment of the utility model;

[0019] Figure 4 It is a structural schematic diagram of a coaxial air blowing sleeve in an adjustable coaxial air blowing device for laser welding according to an embodiment of the utility model;

[0020] Figure 5 The utility model is a schematic structural diagram of an anti-collision screw in an adjustable coaxial air blowing device for laser welding according to an embodiment of the utility model.

[0021] In the figure:

[0022] 1. Coaxial air blowing base; 2. Connecting ring; 3. Coaxial air blowing cylinder; 4. Height adjustment ring; 5. Copper nozzle connecting block; 6. Coaxial air blowing nozzle; 7. L-shaped threaded quick insert; 8. Adjusting screw; 9. Second O-ring; 10. First O-ring; 11. Mounting through hole; 12. Annular boss; 100. Upper suction block; 200. Lower suction block; 300. Anti-collision screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] According to an embodiment of the utility model, an adjustable coaxial air blowing device for laser welding is provided, comprising a coaxial air blowing base 1, a connecting ring 2 is provided on the periphery of the coaxial air blowing base 1, a coaxial air blowing tube 3 is provided on one side of the connecting ring 2, a height adjustment ring 4 is provided on one side of the coaxial air blowing tube 3, a copper nozzle connecting block 5 is provided on one side of the height adjustment ring 4, a coaxial air blowing nozzle 6 is provided on one side of the copper nozzle connecting block 5, except that the copper nozzle connecting block 5 and the coaxial air blowing nozzle 6 are made of red copper, the remaining structural materials are made of 6 series aluminum alloy, which is light in weight and has fast heat conduction, and is conducive to heat dissipation.

[0025] like Figure 1-Figure 5As shown, according to the adjustable coaxial blowing device for laser welding of the embodiment of the utility model, a mounting through hole 11 is provided inside the coaxial blowing base 1, an annular boss 12 is provided on the upper surface of the coaxial blowing base 1, a first O-ring 10 is embedded in the upper surface of the coaxial blowing base 1, an L-shaped threaded quick connector 7 is connected to one side of the coaxial blowing base 1, and an upper suction block 100 is embedded in the lower surface of the coaxial blowing base 1.

[0026] Through the above technical solution, the coaxial blowing base 1 is fixed to the laser welding head by four screws through the mounting through hole 11. An annular boss 12 is arranged on the upper surface to interlock with the inner wall of the laser welding head to ensure the coaxiality of the coaxial blowing base 1 and the laser welding head. The first O-ring 10 is embedded in the upper surface to ensure the sealing between the coaxial blowing base 1 and the welding head. A threaded through hole is opened on the side to connect the L-shaped threaded quick plug 7. The inside is grooved to protect the gas intake and guide the flow. An external thread is added to the cylindrical shape below the base, which is threadedly connected to the connecting ring 2 for adjusting the coaxiality. A 5mm thick upper suction block 100 is embedded in the lower surface of the base, and four threaded holes are distributed to facilitate the fixing of the coaxial blowing cylinder 3.

[0027] like Figure 1-Figure 5 As shown, according to the adjustable coaxial blowing device for laser welding of the embodiment of the utility model, the internal thread of the connecting ring 2 is connected with an adjusting screw 8, the inner hole above the connecting ring 2 is tapped with an internal thread, and is connected to the coaxial blowing base 1 through the thread, and 4 threaded holes are evenly distributed around the bottom, and the adjusting screw 8 is fixed to adjust the coaxiality of the coaxial blowing cylinder 3.

[0028] like Figure 1-Figure 5 As shown, according to the adjustable coaxial air blowing device for laser welding of the embodiment of the utility model, a second O-ring 9 is embedded in the upper surface of the coaxial air blowing cylinder 3, a lower suction block 200 is installed inside the coaxial air blowing cylinder 3, and an anti-collision screw 300 is arranged on the periphery of the lower suction block 200.

[0029] Through the above technical solution, the upper surface of the coaxial air cylinder 3 is embedded with a second O-ring 9 to ensure air tightness; a 3mm thick lower suction block 200 is embedded, and four through holes are distributed corresponding to the threaded holes of the coaxial air blowing base 1, and anti-collision screws 300 are used for fixing during installation. The cylindrical part below the coaxial air cylinder is provided with external threads to facilitate the fixing of the height adjustment ring 4 and the copper nozzle connection block 5.

[0030] like Figure 1-Figure 5 As shown, according to the adjustable coaxial air blowing device for laser welding of the utility model embodiment, the copper nozzle connecting block 5 is threadedly connected with the coaxial air blowing nozzle 6, the copper nozzle connecting block 5 is respectively tapped with corresponding threads at the upper and lower parts, the upper thread is connected with the coaxial air blowing cylinder 3, the lower thread is connected with the coaxial air blowing nozzle 6, and the contour is grooved for easy screwing.

[0031] like Figure 1-Figure 5As shown, according to the adjustable coaxial air blowing device for laser welding of the embodiment of the utility model, the outer contour of the coaxial air blowing nozzle 6 is grooved for easy screwing. The coaxial air blowing nozzle 6 has a small opening to reduce the impact of spatter on the laser welding head during laser welding. The material is made of copper, which has a high melting temperature and has less adhesion when the welding slag is splashed, thus avoiding the impact of the welding slag splash on the copper nozzle. The copper nozzle can be replaced in time after being damaged, which is convenient to operate and avoids the impact on other parts of the coaxial air blowing device.

[0032] The coaxial air blowing base 1 and the coaxial air blowing sleeve are made of aluminum alloy, but not limited thereto; the protective copper nozzle connecting block 5 and the protective coaxial air blowing nozzle 6 are made of copper, but not limited thereto.

[0033] During laser welding, the direction of the shielding gas blowing is consistent with the beam, so the protection effect is not limited by the welding direction. During the welding process, the molten pool and the high-temperature weld area behind the molten pool can be fully protected. The protection effect is good, effectively reducing the pollution of the inner nozzle by welding spatter and the burning of the inner nozzle by welding flame. When laser welding galvanized sheets, the coaxial blowing airflow is swept vertically downward. Affected by the reflection of the welding sheet, the welding slag spreads outward. When the surface requirements of the welded workpiece are high, there will be welding spatter defects. In order to ensure the cleanliness of the welded workpiece surface, a side-axis blowing device can be added to blow the welding slag in a specific direction, thereby reducing the impact of welding spatter on the surface of the welded workpiece.

[0034] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0035] In summary, with the aid of the above-mentioned technical scheme of the utility model, the coaxial blowing base 1 is fixed on the laser welding head by four screws through the mounting through hole 11, and an annular boss 12 is arranged on the upper surface to interlock with the inner wall of the laser welding head to ensure the coaxiality of the coaxial blowing base 1 and the laser welding head. A first O-ring 10 is embedded in the upper surface to ensure the sealing between the coaxial blowing base 1 and the welding head. A threaded through hole is opened on the side to connect the L-shaped threaded quick plug 7. The inside is grooved to protect the gas intake and guide the flow. An external thread is added to the cylinder below the base, which is threadedly connected to the connecting ring 2 for adjusting the coaxiality. A 5mm thick upper suction block 100 is embedded in the lower surface of the base, and four threaded holes are distributed to facilitate the fixing of the coaxial blowing cylinder 3;

[0036] The upper surface of the coaxial air blowing cylinder 3 is embedded with a second O-ring 9 to ensure air tightness; a 3mm thick lower suction block 200 is embedded, with four through holes corresponding to the threaded holes of the coaxial air blowing base 1, and anti-collision screws 300 are used to fix it during installation. The cylindrical part below the coaxial air blowing cylinder is provided with external threads to facilitate the fixing of the height adjustment ring 4 and the copper nozzle connection block 5;

[0037] The outer contour of the coaxial air blowing nozzle 6 is grooved for easy screwing. The coaxial air blowing nozzle has a small opening to reduce the impact of spatter on the laser welding head during laser welding. The material is copper, which has a high melting temperature and has less adhesion when the welding slag is splashed, thus avoiding the impact of the welding slag splash on the copper nozzle. The copper nozzle can be replaced in time after being damaged, which is easy to operate and avoids the impact on other parts of the coaxial air blowing device.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable coaxial air blowing device for laser welding, characterized in that: The invention comprises a coaxial air blowing base (1), wherein a connecting ring (2) is provided on the periphery of the coaxial air blowing base (1), a coaxial air blowing cylinder (3) is provided on one side of the connecting ring (2), a height adjustment ring (4) is provided on one side of the coaxial air blowing cylinder (3), a copper nozzle connecting block (5) is provided on one side of the height adjustment ring (4), and a coaxial air blowing nozzle (6) is provided on one side of the copper nozzle connecting block (5).

2. The adjustable coaxial air blowing device for laser welding according to claim 1, characterized in that: A first O-ring (10) is embedded in the upper surface of the coaxial blowing base (1), an L-shaped threaded quick connector (7) is connected to one side of the coaxial blowing base (1), and an upper suction block (100) is embedded in the lower surface of the coaxial blowing base (1).

3. The adjustable coaxial air blowing device for laser welding according to claim 2, characterized in that: A mounting through hole (11) is provided inside the coaxial air blowing base (1), and an annular boss (12) is provided on the upper surface of the coaxial air blowing base (1).

4. The adjustable coaxial air blowing device for laser welding according to claim 3, characterized in that: The connecting ring (2) is internally threaded with an adjusting screw (8).

5. The adjustable coaxial air blowing device for laser welding according to claim 4, characterized in that: A second O-ring (9) is embedded in the upper surface of the coaxial air blowing cylinder (3), a lower suction block (200) is installed inside the coaxial air blowing cylinder (3), and anti-collision screws (300) are arranged on the periphery of the lower suction block (200).

6. The adjustable coaxial air blowing device for laser welding according to claim 5, characterized in that: The copper nozzle connection block (5) is threadedly connected to the coaxial air blowing nozzle (6).

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