Laser welding device

Abstract

The utility model relates to the field of optical fiber communication, and discloses a laser welding device which comprises a machine frame, a laser light source and a positioning support, the laser light source and the positioning support are installed on the machine frame, and the laser light source comprises at least two laser source modules. The positioning support comprises a first positioning table used for fixing an optical fiber, a second positioning table used for fixing a quartz cap and a third positioning table used for fixing a laser emitting end. The laser emitting ends are uniformly distributed along the circumferential direction of the optical fiber; and each laser emitting end is connected with one laser source module through an independent output optical fiber. In the utility model, the visual positioning camera identifies and positions the aligned optical fibers on the two sides, and then more than two laser light sources are annularly fixed on one side of the third positioning table fixed on the rack by taking the optical fibers as the circle center, so that the laser light sources are independent light sources, and the effects of improving the stability and reducing the laser loss are achieved; the problems that laser loss and instability are increased due to introduction of the spectroscope and the reflector are solved, and the welding quality of the laser welding device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optical fiber communication, especially relates to laser fusion device. BACKGROUND

[0002] The fusion device is a kind of equipment that two or more materials (usually metal or plastic) are combined in local area or contact surface by heating, pressure or chemical reaction etc., in order to keep the original performance of material, reduce the deformation caused by thermal expansion, the welding point intensity is high, the weld is uniform, and subsequent finishing is not needed after welding, so laser fusion device needs to be used.

[0003] Laser fusion device can be divided into multiple types, respectively optical fiber laser fusion device, CO2 laser fusion device and YAG laser fusion device etc., laser fusion device can be divided into multiple types according to different application requirements, laser source, working principle and control mode, wherein CO2 laser fusion device uses carbon dioxide gas as laser medium, and generates laser by current excitation.

[0004] The existing optical fiber fusion device usually relies on beam splitter and reflector to adjust laser beam, this method can realize the accurate adjustment of laser beam, but inevitably increases the laser loss and the instability of system, especially in the case of high-power laser output, the loss problem is particularly prominent.How to ensure the precision of optical fiber butt joint and the stable output of laser without introducing additional complex optical adjustment device has become the key problem to improve the welding quality of laser fusion device. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides laser fusion device, aims at improving the introduction of beam splitter and reflector increases the laser loss and instability.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme: laser fusion device, including rack and the laser light source and positioning support installed on the rack.

[0007] Laser light source includes at least two laser source modules.

[0008] Positioning support, including the first positioning table for fixing optical fiber, the second positioning table for fixing quartz cap and the third positioning table for fixing laser emission end.

[0009] Laser emission end is evenly distributed along the circumference of optical fiber.

[0010] Each laser emission end is connected with a laser source module through independent output optical fiber.

[0011] The first positioning table and the second positioning table are three-dimensional positioning tables, and the optical fiber fixed by the first positioning table and the quartz end cap fixed by the second positioning table can be coaxially aligned.

[0012] As a further description of the above technical solution:

[0013] The rack top is fixedly connected with a support, one side of the support is provided with an identification assembly, the third positioning table bottom is fixedly connected in the rack interior, a plurality of laser light sources are fixedly connected in a ring array on one side of the third positioning table, the rack top is fixedly connected with a guide rail, the second positioning table bottom is slidingly connected in the guide rail interior, a clamping groove is formed in the second positioning table interior, the clamping groove is used for clamping the quartz end cap, and a top cover is rotatably connected to the second positioning table top.

[0014] As a further description of the above technical solution:

[0015] The identification assembly comprises a visual positioning camera, and the visual positioning camera outer wall is fixedly connected on one side of the support.

[0016] As a further description of the above technical solution:

[0017] The locking assembly comprises a connecting bolt, the connecting bolt is screwedly connected in the top cover interior, a threaded groove is formed in the second positioning table interior, and the connecting bolt is screwedly connected in the threaded groove interior.

[0018] As a further description of the above technical solution:

[0019] The guide rail interior is fixedly connected with a positioning block one, a positioning groove is formed in the second positioning table interior, and the second positioning table is slidingly connected to the positioning block one outer wall through the positioning groove.

[0020] As a further description of the above technical solution:

[0021] The guide rail interior is formed with a limiting groove, and the guide rail interior is screwedly connected with a fastening bolt.

[0022] As a further description of the above technical solution:

[0023] One end of the fastening bolt is fixedly connected with a limiting block, and the limiting block outer wall is rotatably connected with a positioning block two.

[0024] As a further description of the above technical solution:

[0025] The positioning block two is slidingly connected in the positioning groove interior, one side of the positioning block two is fixedly connected with a limiting column, and the limiting column is slidingly connected in the limiting groove interior.

[0026] The utility model has the advantages of the following beneficial effects:

[0027] 1. The utility model discloses a first visual positioning camera is positioned to the optical fiber of two sides alignment, subsequently fixes third positioning table one side with optical fiber as the center ring fixed 2 or more laser light source on the frame, makes laser light source be independent light source, reached the effect of improving stability, reduce laser loss, solved the introduction of beam splitter and mirror increased laser loss and instability, improved the welding quality of laser fusion device.

[0028] 2. The utility model discloses, rotate fastening bolt and drive positioning block no. 2 embed in the positioning groove, in the process of continuing to rotate fastening bolt, positioning block no. 2 is fixed to the second positioning table closely in the inner wall of positioning groove, because positioning block no. 2 is conical with positioning groove, can be self -determined in the process of fixing, reached the effect of quick positioning fixing base, solved the laser fusion device when aligning optical fiber, cannot quick regulation the interval of optical fiber, and need manual positioning more complicated when every time dismounts installation, improved the convenience of laser fusion device. DRAWINGS

[0029] Figure 1 It is the perspective drawing of laser fusion device that the utility model proposes;

[0030] Figure 2 It is the guide rail structure schematic view of laser fusion device that the utility model proposes;

[0031] Figure 3 It is the second positioning table structure schematic view of laser fusion device that the utility model proposes;

[0032] Figure 4 It is the inside structure schematic view of positioning block no. 2 of laser fusion device that the utility model proposes;

[0033] Figure 5 It is Figure 1 The local amplification structure schematic view of place A in the middle.

[0034] Legend:

[0035] 1, frame;2, support;3, visual positioning camera;4, third positioning table;5, laser light source;6, guide rail;7, positioning block no. 1;8, second positioning table;9, top cover;10, quartz end cap;11, connecting bolt;12, thread groove;13, positioning groove;14, fastening bolt;15, positioning block no. 2;16, limit post;17, limit slot;18, limit block;19, clamping groove;20, first positioning table;21, laser emission end. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] With reference to Figure 1 And Figure 5 An embodiment provided by the utility model: rack 1 and laser light source 5 and positioning support installed on rack 1. Rack 1 provides the support structure of the whole laser welding device, ensures that each component is stably and accurately fixed, and guarantees the operation accuracy and reliability of the laser system. The design of rack 1 enables the orderly installation and adjustment of each module and component;

[0038] Laser light source 5 includes at least two laser source modules. Laser light source 5, as the core component of the device, is responsible for generating laser beams, which are used for welding different materials. The configuration of multiple laser source modules can provide higher power output and better laser stability, while ensuring that the needs of different materials and welding depths can be met;

[0039] Positioning support, including first positioning table 20 for fixing optical fiber, second positioning table 8 for fixing quartz cap and third positioning table 4 for fixing laser emitting end 21. The positioning support ensures that the contact position and angle of the output end of the laser beam and the workpiece are consistent through the accurate fixing and positioning mechanism, guaranteeing the accuracy in the laser welding process. The first positioning table 20 fixes the optical fiber, ensuring that the optical fiber can stably transmit laser, avoiding unstable output of the laser beam due to the position deviation of the optical fiber; the second positioning table 8 fixes the quartz cap, ensuring the butt joint accuracy of the optical fiber port and the quartz cap; and the third positioning table 4 is responsible for fixing the laser emitting end, ensuring that the output position and angle of the laser beam are correct;

[0040] The laser emitting ends are uniformly distributed along the circumference of the optical fiber. By uniformly distributing multiple laser emitting ends around the optical fiber, the output of the laser beam can be more uniform, ensuring that the heat distribution of the laser is uniform, improving the welding quality, avoiding local overheating or deficiency, and thus improving the welding effect and efficiency;

[0041] Each laser emitting end is connected with a laser source module through an independent output optical fiber. The independent optical fiber setting enables each laser emitting end to work independently, providing better control ability, and at the same time, the output power and beam characteristics of different laser source modules can be adjusted through different optical fibers, ensuring accurate control;

[0042] The first positioning table 20 and the second positioning table 8 are three-dimensional positioning tables. The optical fiber fixed by the first positioning table 20 and the quartz end cap fixed by the second positioning table 8 can be coaxially aligned. The three-dimensional positioning table provides high-precision three-dimensional adjustment capability, ensures the butt joint accuracy between the optical fiber and the quartz cap and the stability of the optical path transmission, effectively avoids the beam misalignment caused by position deviation, ensures the accuracy and consistency of the laser beam output, and the rack 1 is fixedly connected with the support 2, and the support 2 is provided with an identification assembly on one side. The support 2 provides fixed support for the identification assembly, so that it can accurately detect and identify the workpiece position of the laser fusion device, helping the system to realize automatic positioning and workpiece butt joint. The identification assembly can use a vision system or a sensor to determine the position, shape and surface state of the workpiece, thereby providing real-time feedback for laser fusion. The third positioning table 4 is fixedly connected inside the rack 1, and a plurality of laser light sources 5 are fixedly connected in a ring array on one side of the third positioning table 4. The third positioning table 4 ensures that the plurality of laser light sources can be accurately fixed and adjusted in the same plane, and the ring array helps to provide a larger range of laser coverage, improving the fusion speed and efficiency. The rack 1 is fixedly connected with the guide rail 6 on the top, and the second positioning table 8 is slidingly connected inside the guide rail 6. The guide rail 6 provides a stable sliding track, so that the second positioning table 8 can be accurately adjusted horizontally or vertically along the track. This structure design helps to realize accurate positioning and uniform distribution of laser beams, meeting the fusion needs of different workpieces. The second positioning table 8 is provided with a clamping groove 19 inside, and the clamping groove 19 is used for clamping the quartz end cap 10. The clamping groove 19 ensures that the quartz end cap can be stably fixed in the positioning table, and provides appropriate guidance for the laser beam through the quartz end cap, so that the laser beam is not disturbed in the transmission process, ensuring the direction and stability of the output laser. The top cover 9 is rotatably connected to the top of the second positioning table 8, and the top cover 9 is provided with a locking assembly inside. The top cover 9 provides additional protection, and can be quickly disassembled during maintenance or replacement of parts. The locking assembly ensures that the top cover 9 can be stably fixed during use, avoiding accidental loosening of the top cover during laser operation. The identification assembly includes a visual positioning camera 3, and the visual positioning camera 3 is fixedly connected to one side of the support 2. The visual positioning camera 3 is used to monitor and identify the surface features of the workpiece in real time, ensure the accurate alignment of the workpiece during laser fusion, and can adjust the laser emission position to prevent poor fusion caused by deviation. The locking assembly includes a connecting bolt 11, which is threadedly connected inside the top cover 9. The second positioning table 8 is provided with a threaded groove 12 inside, and the connecting bolt 11 is threadedly connected inside the threaded groove 12. The threaded groove 12 and the connecting bolt 11 ensure the stable connection of the top cover 9 and the second positioning table 8, avoiding loosening or error of the top cover, ensuring the stability and safety of the laser fusion operation.

[0043] Specifically, the visual positioning camera 3 identifies and accurately positions the optical fibers on both sides in real time through a precise image recognition system, ensuring accurate docking of the optical fibers during processing. Subsequently, one side of the third positioning table 4 is fixed on the rack 1, and ≥2 laser light sources 5 are arranged in a ring around the optical fiber as the center, with each laser light source 5 acting as an independent light source, capable of uniformly illuminating the connection part of the optical fiber, thereby ensuring the uniformity and accuracy of the optical fiber fusion. In order to process high-power optical fiber lasers and amplifiers, the quartz end cap 10 plays a crucial role. The quartz end cap 10 effectively reduces the optical power density of the output end face by expanding the beam, thereby reducing the damage or overheating of the optical fiber caused by high power density. The fusion of the laser light source 5 and the optical fiber is completed by using a quartz end cap 10 of appropriate size, which can effectively reduce the loss at the connection and improve the reliability of the optical fiber connection. In addition, the exit surface of the quartz end cap 10 is treated with a dielectric film coating, which can significantly reduce the reflection loss and maximize the transmission efficiency and stability of the system.

[0044] Reference Figures 2-4The inside of the guide rail 6 is fixedly connected with a positioning block one 7, the role of the positioning block one 7 is to ensure the stable sliding of the second positioning table 8 in the guide rail 6, and provide accurate restriction in position, prevent unnecessary deviation of the second positioning table 8. The inside of the second positioning table 8 is provided with a positioning groove 13, the design of the positioning groove 13 can realize the accurate sliding connection between the second positioning table 8 and the positioning block one 7, ensure that the second positioning table 8 can smoothly slide according to the set track in the guide rail 6, and can be accurately positioned according to the demand. The second positioning table 8 is slidably connected to the outer wall of the positioning block one 7 through the positioning groove 13, this structure makes the sliding of the second positioning table 8 more smooth and stable, ensures the accurate butt joint between the laser light source 5 and the fiber end face, the inside of the guide rail 6 is provided with a limiting groove 17, the role of the limiting groove 17 is to limit the movement range of the limiting block 18, prevent the second positioning table 8 from exceeding the predetermined position in the sliding process. The inside of the guide rail 6 is threadedly connected with a fastening bolt 14, one end of the fastening bolt 14 is fixedly connected with the limiting block 18, the adjustment of the fastening bolt 14 can accurately control the sliding range of the second positioning table 8 in the guide rail 6, and ensure the stability of the second positioning table 8 in the sliding process. The outer wall of the limiting block 18 is rotatably connected with a positioning block two 15, the role of the positioning block two 15 is to ensure that the second positioning table 8 always maintains stable connection with the guide rail 6 and the positioning groove 13 when moving in the guide rail 6, avoid the phenomenon of deviation or misalignment. The positioning block two 15 is slidably connected inside the positioning groove 13, ensuring that the second positioning table 8 can be accurately moved to the set position in the guide rail 6, one side of the positioning block two 15 is fixedly connected with a limiting column 16, the limiting column 16 is slidably connected inside the limiting groove 17, the role of the limiting column 16 is to further limit the movement range of the positioning block two 15, prevent the deviation of the position of the second positioning table 8 in the operation process. The sliding property of the limiting column 16 ensures that the positioning block two 15 can freely slide in the limiting groove 17, while avoiding excessive friction, providing smooth sliding experience;

[0045] Specifically, when fixing and positioning the optical fiber, first, the optical fiber is accurately fitted in the clamping groove 19, ensuring that the optical fiber is stable and not disturbed by the outside, and the clamping groove 19 effectively limits the optical fiber. Then, the top cover 9 is tightly buckled with the second positioning table 8, and the top cover 9 is firmly locked with the second positioning table 8 by rotating the connecting bolt 11, so as to ensure that the optical fiber does not shift or loosen during the entire fixing process. Next, adjust the position of the second positioning table 8 on the guide rail 6, at this time, by rotating the fastening bolt 14, the positioning block two 15 is embedded in the positioning groove 13, and with the further rotation of the fastening bolt 14, the positioning block two 15 tightly fits in the inner wall of the positioning groove 13, ensuring that the second positioning table 8 is stable. The positioning block two 15 and the positioning groove 13 are conical structures, which can automatically adjust and realize self-positioning, thereby ensuring fast and accurate fixing effect.

[0046] Working principle: when using the laser welding device, first, the optical fiber is fixed and positioned, the optical fiber is embedded in the clamping groove 19 for limiting, then the top cover 9 is buckled with the second positioning table 8, the connecting bolt 11 is rotated to lock the top cover 9 with the second positioning table 8 to fix the optical fiber, then the position of the second positioning table 8 on the guide rail 6 is adjusted, then the positioning block two 15 is embedded in the positioning groove 13 by rotating the fastening bolt 14, in the process of continuing to rotate the fastening bolt 14, the positioning block two 15 is tightly attached to the inner wall of the positioning groove 13 to fix the second positioning table 8, since the positioning block two 15 and the positioning groove 13 are conical, self-positioning can be achieved during fixing, so that the effect of quickly positioning the fixing seat is achieved.

[0047] Then the visual positioning camera 3 identifies and positions the two aligned optical fibers, then the third positioning table 4 on the rack 1 is fixed with the optical fiber as the center to fix 2 laser light sources 5, so that the laser light source 5 is an independent light source, the clamping groove 19 is used for high-power optical fiber laser and amplifier output end face processing high-power devices, through the expansion of the output beam, the light power density of the output end face is reduced. The laser light source 5 is fused with the optical fiber by using a clamping groove 19 with appropriate size, and the reflection loss can be effectively reduced by coating an antireflection film on the exit surface of the clamping groove 19, so that the stability is improved and the laser loss is reduced.

[0048] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A laser welding device, comprising a rack (1) and a laser light source (5) and a positioning support mounted on the rack (1), characterized in that: the laser light source (5) comprises at least two laser source modules; the positioning support comprises a first positioning table (20) for fixing an optical fiber, a second positioning table (8) for fixing a quartz end cap (10), and a third positioning table (4) for fixing a laser emitting end (21); the laser emitting ends are uniformly distributed along the circumference of the optical fiber; each laser emitting end is connected to a laser source module through an independent output optical fiber; the first positioning table (20) and the second positioning table (8) are three-dimensional positioning tables, and the optical fiber fixed by the first positioning table (20) can be coaxially aligned with the quartz end cap fixed by the second positioning table (8). The top of the rack (1) is fixedly connected with a support (2), one side of the support (2) is provided with an identification assembly, the bottom of the third positioning table (4) is fixedly connected inside the rack (1), one side of the third positioning table (4) is fixedly connected with a plurality of laser light sources (5) in a ring array, the top of the rack (1) is fixedly connected with a guide rail (6), the bottom of the second positioning table (8) is slidingly connected inside the guide rail (6), a clamping groove (19) is formed in the second positioning table (8), the clamping groove (19) is used for clamping the quartz end cap (10), the top of the second positioning table (8) is rotatably connected with a top cover (9), and the inside of the top cover (9) is provided with a locking assembly. The identification assembly comprises a visual positioning camera (3), and the outer wall of the visual positioning camera (3) is fixedly connected to one side of the support (2). The locking assembly comprises a connecting bolt (11), the connecting bolt (11) is threadedly connected inside the top cover (9), a threaded groove (12) is formed in the second positioning table (8), and the connecting bolt (11) is threadedly connected inside the threaded groove (12). The inside of the guide rail (6) is fixedly connected with a positioning block one (7), a positioning groove (13) is formed in the second positioning table (8), and the second positioning table (8) is slidingly connected to the outer wall of the positioning block one (7) through the positioning groove (13). A limiting groove (17) is formed in the inside of the guide rail (6), and a fastening bolt (14) is threadedly connected inside the guide rail (6).

2. The laser welding apparatus of claim 1, wherein: One end of the fastening bolt (14) is fixedly connected with a limiting block (18), and the outer wall of the limiting block (18) is rotatably connected with a positioning block two (15).

3. The laser welding apparatus of claim 2, wherein: The positioning block two (15) is slidingly connected inside the positioning groove (13), one side of the positioning block two (15) is fixedly connected with a limiting column (16), and the limiting column (16) is slidingly connected inside the limiting groove (17).

4. The laser welding apparatus of claim 2, wherein: ​ 5. The laser welding apparatus of claim 2, wherein: ​ 6. The laser welding apparatus of claim 2, wherein: ​ 7. The laser welding apparatus of claim 6, wherein: ​ 8. The laser welding apparatus of claim 7, wherein: ​

Images