Coupling welding equipment and coupling welding method

Abstract

The invention provides coupling welding equipment and a coupling welding method.The coupling welding equipment comprises an objective table, a power-up module, a first optical fiber propelling mechanism, a second optical fiber propelling mechanism and a welding mechanism, a laser clamp is installed on the objective table, and the power-up module is configured to be capable of powering up a laser; the first optical fiber propelling mechanism comprises a first optical fiber movement adjusting mechanism, a first optical fiber clamp is installed on the first optical fiber movement adjusting mechanism, and the first optical fiber propelling mechanism is configured to be capable of clamping an optical fiber and driving the optical fiber to be close to or away from the objective table, so that the front end of the optical fiber extends into the laser tube shell and enters a coupling area; the second optical fiber propelling mechanism comprises a second optical fiber movement adjusting mechanism, a second optical fiber clamp is installed on the second optical fiber movement adjusting mechanism, the second optical fiber propelling mechanism is configured to be capable of clamping the optical fiber and driving the front end of the optical fiber to be close to the laser for coupling light finding, and the welding mechanism is configured to be capable of welding the optical fiber and the laser.

Description

Technical Field

[0001] This invention belongs to the field of optical communication technology, specifically relating to a coupling welding device and a coupling welding method. Background Technology

[0002] In traditional fiber laser coupling technology, coupling and welding need to be completed on different equipment, which increases inter-process errors and time costs.

[0003] In addition, the fiber optic cable has a bevel at the front end. This bevel (usually around 8°, used to suppress Fresnel reflection) is tilted relative to the fiber axis. If the fiber angle is not adjusted before aligning the fiber with the laser, a series of coupling problems will occur:

[0004] 1. The alignment accuracy is fundamentally reduced:

[0005] The inherent decrease in alignment accuracy is due to the fact that the laser's emitted light propagates along the optical axis, while the normal direction of the fiber's bevel is at a fixed angle to the fiber axis. If the fiber angle is not adjusted, the bevel normal cannot be parallel to the laser's optical axis. Even if the X / Y axes are precisely aligned, the incident / emission angles of the light will deviate from the optimal coupling path, directly leading to a reduction in the effective mode field overlap and a degradation of alignment accuracy from "submicron level" to "micron level".

[0006] 2. Coupling efficiency is significantly reduced:

[0007] The core of end-face coupling, which significantly reduces coupling efficiency, is mode field matching. The deviation of the inclined plane angle will cause the mode field distribution of the optical fiber to be misaligned with that of the laser. Most of the light will be reflected by the inclined plane or deviate from the effective transmission area of ​​the optical fiber waveguide. The coupling efficiency may suddenly increase from below 0.5dB to above 3dB, or even fail to establish an effective optical connection.

[0008] 3. Precise alignment becomes significantly more difficult, requiring repeated adjustments:

[0009] Without prior angle calibration, translation adjustments along the X / Y / Z axes alone are almost insufficient to compensate for mode field mismatch caused by angular deviations. Even with repeated searches using power monitoring for active alignment, it is necessary to expand the adjustment range and increase the number of iterations, which is not only time-consuming but may also cause the optimal coupling point to be missed due to an excessively large search range. Summary of the Invention

[0010] The purpose of this invention is to overcome at least one defect in the prior art and to provide a coupling welding device and a coupling welding method.

[0011] The technical solution of this invention is implemented as follows: This invention provides a coupling welding device, comprising:

[0012] A stage, on which a laser fixture is mounted, the laser fixture being configured to fix the laser.

[0013] A power supply module configured to power the laser;

[0014] The first optical fiber propulsion mechanism includes a first optical fiber movement adjustment mechanism, on which a first optical fiber clamp is installed. The first optical fiber propulsion mechanism is configured to clamp the optical fiber, drive the optical fiber closer to or away from the stage, so that the front end of the optical fiber extends into the laser tube housing and enters the coupling region.

[0015] The second fiber propulsion mechanism includes a second fiber movement adjustment mechanism, on which a second fiber clamp is installed. The second fiber propulsion mechanism is configured to hold the fiber and drive the fiber tip to approach the laser for coupling and light finding.

[0016] A welding mechanism configured to weld optical fibers to a laser.

[0017] In some embodiments, the welding mechanism includes at least one welding module, which is fixedly mounted on a welding movement adjustment mechanism. The welding movement adjustment mechanism is configured to drive the welding module to translate along a first axis, a second axis, and a third axis, wherein the second and third axes are perpendicular to the first axis, and the second axis is perpendicular to the third axis (e.g., the Z-axis). Furthermore, the first fiber optic movement adjustment mechanism is configured to drive the welding module to rotate around the first axis. The first axis is defined as the X-axis, the second axis as the Y-axis, and the third axis as the Z-axis.

[0018] In some embodiments, the coupling welding device of the present invention further includes a vision mechanism, which is configured to acquire images of the coupling area inside the laser and the front end of the optical fiber material, and transmit the images to a control unit. The control unit is electrically connected to the vision mechanism, the first optical fiber movement adjustment mechanism, the second optical fiber movement adjustment mechanism, and the welding mechanism, respectively.

[0019] In some embodiments, the vision mechanism includes:

[0020] The first vision module has its optical axis tilted downwards, facing the front end of the optical fiber material;

[0021] or / and,

[0022] The second vision module has its optical axis set vertically downwards, facing the coupling region inside the laser;

[0023] or / and,

[0024] The third vision module has its optical axis tilted downwards, facing the coupling area inside the laser.

[0025] In some embodiments, the vision mechanism further includes a fourth vision module, the optical axis of which is tilted downward toward the coupling region inside the laser.

[0026] The second visual module is fixedly mounted on the second visual movement adjustment mechanism. The third visual module is fixedly mounted on the third visual movement adjustment mechanism. The first visual module is fixedly mounted on the first visual movement adjustment mechanism. The fourth visual module is fixedly mounted on the fourth visual movement adjustment mechanism.

[0027] Both the third and fourth visual movement adjustment mechanisms are mounted on the column.

[0028] The third vision movement adjustment mechanism is capable of driving the third vision module to translate along the fourth, fifth, and sixth axes, with the fourth and fifth axes perpendicular to the sixth axis. The third vision movement adjustment mechanism is also configured to drive the third vision module to rotate around the fifth axis. The sixth axis is defined as the Z-axis.

[0029] The third vision movement adjustment mechanism is also configured to drive the third vision module to translate along the tenth axis, which is parallel to the optical axis of the third vision module.

[0030] The fourth vision movement adjustment mechanism is configured to drive the fourth vision module to translate along the seventh, eighth, and ninth axes, with the seventh and eighth axes perpendicular to the ninth axis. Furthermore, the fourth vision movement adjustment mechanism is configured to drive the fourth vision module to rotate around the eighth axis. The ninth axis is defined as the Z-axis.

[0031] The fourth vision movement adjustment mechanism is also configured to drive the fourth vision module to translate along the eleventh axis, which is parallel to the optical axis of the fourth vision module.

[0032] Both the second visual movement adjustment mechanism and the first visual movement adjustment mechanism are installed on the gantry.

[0033] The second vision movement adjustment mechanism is configured to drive the second vision module to translate along the first axis, the second axis, and the third axis. The second axis and the third axis are perpendicular to the first axis, and the second axis is perpendicular to the third axis (such as the Z axis).

[0034] The first visual movement adjustment mechanism is configured to drive the first visual module to translate along the twelfth, thirteenth, and fourteenth axes, with the twelfth and thirteenth axes perpendicular to each other. Furthermore, the first visual movement adjustment mechanism is configured to drive the first visual module to rotate around the second axis. The fourteenth axis is the Z-axis.

[0035] In some embodiments, the first optical fiber clamp includes a clamp base and a clamp cover plate. The clamp cover plate is detachably fixed to the clamp base, so that the optical fiber is fastened between the clamp base and the clamp cover plate. The clamp base is provided with a groove for accommodating the optical fiber. The clamp base is rotatably supported on a clamp support. A fastening device for fastening the clamp base is connected to the clamp support. The clamp support is fixedly connected to the first optical fiber movement adjustment mechanism.

[0036] And / or,

[0037] The first optical fiber movement adjustment mechanism is configured to at least drive the first optical fiber clamp to translate along the first axis, which is parallel to the optical fiber.

[0038] The first fiber optic movement adjustment mechanism is a four-axis displacement stage.

[0039] In some embodiments, the first fiber optic movement adjustment mechanism is configured to drive the first fiber optic clamp to translate along a first axis, a second axis, and a third axis, wherein the second and third axes are perpendicular to the first axis, and the second axis is perpendicular to the third axis (such as the Z-axis). Furthermore, the first fiber optic movement adjustment mechanism is configured to drive the first fiber optic clamp to rotate around the third axis (such as the Z-axis).

[0040] In some embodiments, one end of the clamp base is connected to a rotating handle;

[0041] And / or,

[0042] The clamp support is provided with a support hole for supporting the clamp base. One end of the clamp base is located in the support hole of the clamp support. The fastening device includes a fastening screw. The clamp support is provided with a threaded hole. One end of the threaded hole communicates with the support hole. The fastening screw is threadedly engaged with the threaded hole.

[0043] In some embodiments, the other end of the clamp base is connected to a front support plate, and the upper end of the front support plate is provided with a groove for accommodating the front end of the optical fiber.

[0044] In some embodiments, the second fiber optic clamp includes a clamp base plate, a movable jaw, a fixed jaw, and a jaw drive device. The fixed jaw is fixedly connected to the clamp base plate. A first slide rail slider assembly is fixedly mounted on the clamp base plate. The slider of the first slide rail slider assembly is fixedly connected to the movable jaw mounting base. The movable jaw mounting base is fixedly connected to the movable jaw. The movable jaw mounting base is connected to the jaw drive device.

[0045] In some embodiments, a second slide rail slider assembly is fixedly mounted on the movable jaw clamp mounting base. The slider of the second slide rail slider assembly is connected to the output shaft of the motor via an upper stop sleeve and a lower stop sleeve. A motor mounting plate is fixed on the fixture base plate, and the motor is fixed on the motor mounting plate.

[0046] An elastic element fixing plate and a slide rail slider assembly extending in the vertical direction are fixed on the base plate of the fixture. A slider adapter plate is fixed on the slide rail slider assembly. An elastic element is provided between the slider adapter plate and the elastic element fixing plate. A suction nozzle mounting plate is fixed on the slider adapter plate. The suction nozzle is fixed on the suction nozzle mounting plate.

[0047] In some embodiments, the second fiber optic movement adjustment mechanism is a six-axis displacement stage.

[0048] The second fiber optic movement adjustment mechanism has six degrees of freedom.

[0049] In some embodiments, the welding mechanism includes a welding module, which is fixedly mounted on the welding movement adjustment mechanism.

[0050] In some embodiments, the stage includes a base, a thermoelectric cooling module is fixed on the base, a heat-conducting seat is fixed on the thermoelectric cooling module, and the laser fixture is fixed on the heat-conducting seat;

[0051] The power-on module includes a power-on board and a power-on plate. The power-on board has several independent power-on contacts corresponding to different pins of the laser. The power-on board is fixed on a pad, and the pad is fixed on a heat-conducting base. When the laser is clamped on the laser fixture, the laser pins are supported on the power-on contacts of the power-on board. The power-on plate is located directly above the power-on board. The power-on plate is connected to a power-on drive device for driving the power-on plate to rise and fall. The power-on board is electrically connected to a power supply control unit.

[0052] In some embodiments, the electric drive device is a cylinder, which is mounted on a base. The output shaft of the cylinder is connected to one end of the pressure plate drive arm, and the other end of the pressure plate drive arm is connected to the voltage plate. The pressure plate drive arm is connected to the slider of the third slide rail slider assembly, and the slide rail of the third slide rail slider assembly is fixed on the base.

[0053] In some embodiments, the stage further includes a third moving adjustment mechanism, and the base is fixedly mounted on the third moving adjustment mechanism. The third moving adjustment mechanism is configured to drive the laser fixture to translate along the first axis and the second axis. The third moving adjustment mechanism is a two-axis displacement stage.

[0054] In some embodiments, the thermoelectric cooling module is fixed with an insulation cover, and the insulation cover has an opening for making way for the heat-conducting seat.

[0055] Secondly, the present invention also provides a coupling welding method, comprising the following steps:

[0056] After the optical fiber is clamped on the first optical fiber clamp, an image of the optical fiber front end is acquired, the optical fiber front end angle is obtained based on the image, and the first optical fiber clamp is controlled to rotate the optical fiber to the set angle based on the optical fiber front end angle.

[0057] After the optical fiber is adjusted to the set angle and the laser is already clamped on the laser fixture of the stage, the first optical fiber propulsion mechanism is controlled to drive the optical fiber closer to the stage and pass the front end of the optical fiber through the laser tube shell into the coupling area.

[0058] After the fiber front end enters the coupling region, the second fiber clamp is controlled to clamp the fiber front end and the first fiber clamp is opened. The second fiber clamp is then controlled to hold the fiber front end close to the laser and perform coupling and light finding.

[0059] After the laser coupling is completed, an image of the laser area is acquired. The location of the area to be welded is obtained based on the image of the laser area. Based on the identified location of the area to be welded, the welding module of the welding mechanism is controlled to move to the location of the area to be welded, and the optical fiber is welded to the laser.

[0060] The present invention has at least the following beneficial effects: The coupling welding device of the present invention includes a stage, a power-on module, a first fiber optic propulsion mechanism, a second fiber optic propulsion mechanism, and a welding mechanism. A laser fixture is mounted on the stage, configured to fix the laser. The power-on module is configured to power the laser. The first fiber optic propulsion mechanism includes a first fiber optic movement adjustment mechanism, on which a first fiber optic fixture is mounted. The first fiber optic propulsion mechanism is configured to clamp the fiber, moving the fiber closer to or away from the stage, so that the fiber tip extends into the laser housing and enters the coupling region. The second fiber optic propulsion mechanism includes a second fiber optic movement adjustment mechanism, on which a second fiber optic fixture is mounted. The second fiber optic propulsion mechanism is configured to clamp the fiber, moving the fiber tip closer to the laser for coupling and light finding. The welding mechanism is configured to weld the fiber to the laser. Using the above-mentioned solution of the present invention, coupling and welding functions are integrated into one unit, reducing intermediate steps and improving production efficiency and consistency. Furthermore, the present invention adjusts the fiber angle first, which can greatly improve the alignment accuracy between the fiber and the laser, significantly improving alignment efficiency and coupling efficiency.

[0061] This invention also employs a dual-fiber propulsion mechanism to provide precise multi-angle adjustment. The first fiber is responsible for precise insertion, while the second fiber is responsible for fine-tuning the light source, significantly improving the coupling success rate. Attached Figure Description

[0062] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 This is a schematic diagram of the structure of a coupling welding device disclosed in one embodiment of the present invention;

[0064] Figure 2 This is a schematic diagram of the stage, the first optical fiber propulsion mechanism, and the second optical fiber propulsion mechanism disclosed in one embodiment of the present invention.

[0065] Figure 3 This is a schematic diagram from one perspective of the second optical fiber propulsion mechanism disclosed in one embodiment of the present invention;

[0066] Figure 4 for Figure 3 A diagram from another perspective;

[0067] Figure 5 This is a schematic diagram of the structure of a second optical fiber clamp disclosed in one embodiment of the present invention;

[0068] Figure 6 This is a schematic diagram from one perspective of the stage and power-on module disclosed in one embodiment of the present invention;

[0069] Figure 7 of Figure 6 A diagram from another perspective;

[0070] Figure 8 of Figure 6 Partial schematic diagram;

[0071] Figure 9 This is a schematic diagram of the structure of a first optical fiber propulsion mechanism disclosed in an embodiment of the present invention;

[0072] Figure 10 This is a schematic diagram of the structure of a first optical fiber clamp disclosed in an embodiment of the present invention;

[0073] Figure 11 of Figure 10 A diagram from another perspective;

[0074] Figure 12 This is a schematic diagram of the welding mechanism disclosed in one embodiment of the present invention;

[0075] Figure 13 of Figure 12 A diagram from another perspective;

[0076] Figure 14 This is a schematic diagram of the structure of an independent pillar vision mechanism disclosed in one embodiment of the present invention.

[0077] In the attached figures, 1 is the first fiber optic propulsion mechanism, 11 is the first fiber optic movement adjustment mechanism, 12 is the first fiber optic clamp, 121 is the clamp base, 122 is the clamp cover plate, 123 is the groove, 124 is the clamp support, 125 is the threaded hole, 126 is the rotating handle, and 127 is the front support plate; 2 is the second fiber optic propulsion mechanism, 21 is the second fiber optic movement adjustment mechanism, 22 is the second fiber optic clamp, 221 is the clamp base plate, 222 is the movable jaw, 223 is the fixed jaw, 224 is the jaw drive device, 225 is the first slide rail slider assembly, 226 is the movable jaw mounting base, 227 is the motor mounting plate, 228 is the second slide rail slider assembly, 229 is the upper stop sleeve, 230 is the lower stop sleeve, 231 is the sensing plate, 232 is the detection device, 3 is the welding mechanism, and 31 is the welding movement adjustment mechanism. 32 is the welding module, 33 is the gantry frame, 4 is the platform, 41 is the base, 42 is the thermoelectric cooling module, 43 is the heat-conducting seat, 44 is the insulation cover, 45 is the laser fixture, 46 is the pushing mechanism, 47 is the limiting plate, 48 is the power plate, 49 is the voltage plate, 410 is the pad, 411 is the power-on drive device, 412 is the pressure plate drive arm, 413 is the third slide rail slider assembly, 414 is the third moving adjustment mechanism, 51 is the first vision module, 52 is the first vision moving adjustment mechanism, 61 is the second vision module, 62 is the second vision moving adjustment mechanism, 71 is the third vision module, 72 is the third vision moving adjustment mechanism, 73 is the column, 74 is the fourth vision module, 75 is the fourth vision moving adjustment mechanism, 8 is the laser, 81 is the laser tube shell, 9 is the optical platform, and 10 is the optical fiber. Detailed Implementation

[0078] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0079] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this invention, unless otherwise stated, "a plurality of" or "several" means two or more.

[0081] See Figures 1 to 14 The present invention provides a coupling welding device, comprising:

[0082] A stage 4 is provided, on which a laser clamp 45 is mounted, the laser clamp 45 being configured to fix a laser 8.

[0083] A power supply module, configured to power the laser 8;

[0084] The first optical fiber propulsion mechanism 1 includes a first optical fiber movement adjustment mechanism 11, on which a first optical fiber clamp 12 is installed. The first optical fiber propulsion mechanism 1 is configured to clamp the optical fiber and drive the optical fiber 10 to move closer to or away from the stage 4, so that the front end of the optical fiber 10 extends into the laser tube housing 81 and enters the coupling region.

[0085] The second fiber propulsion mechanism 2 includes a second fiber movement adjustment mechanism 21, on which a second fiber clamp 22 is installed. The second fiber propulsion mechanism 2 is configured to clamp the fiber and drive the fiber tip to approach the laser 8 for coupling and light finding.

[0086] Welding mechanism 3, which is configured to weld optical fiber to laser 8.

[0087] The above-described solution of this invention integrates coupling and welding functions into one unit, reducing intermediate steps and improving production efficiency and consistency. Furthermore, this invention employs a dual-fiber propulsion mechanism to provide multi-angle precise adjustment; the first fiber is responsible for precise insertion, and the second fiber is responsible for fine-tuning the light source, significantly improving the coupling success rate.

[0088] In some embodiments, the welding mechanism 3 includes at least one welding module 32, which is fixedly mounted on a welding movement adjustment mechanism 31. The welding movement adjustment mechanism 31 is configured to drive the welding module 32 to translate along a first axis, a second axis, and a third axis, wherein the second and third axes are perpendicular to the first axis, and the second axis is perpendicular to the third axis (e.g., the Z-axis). Furthermore, the welding movement adjustment mechanism 31 is configured to drive the welding module 32 to rotate around the first axis, facilitating complete welding and preventing incomplete or missed welds. The first axis is defined as the X-axis, the second axis as the Y-axis, and the third axis as the Z-axis.

[0089] In some embodiments, the coupling welding device of the present invention further includes a vision mechanism, which is configured to acquire images of the coupling area inside the laser 8 and the front end of the optical fiber material, and transmit the images to the control unit. The control unit is electrically connected to the vision mechanism, the first optical fiber movement adjustment mechanism 11, the second optical fiber movement adjustment mechanism 21, and the welding mechanism 3, respectively.

[0090] In some embodiments, the vision mechanism includes a first vision module 51, the optical axis of which is inclined downwards and faces the front end of the optical fiber material. The front end of the optical fiber has a bevel.

[0091] In some embodiments, the vision mechanism includes a second vision module 61, the optical axis of which is vertically downward and directed toward the coupling region within the laser 8.

[0092] In some embodiments, the vision mechanism includes a third vision module 71, the optical axis of which is tilted downward toward the coupling region inside the laser 8.

[0093] The first vision module 51 is used to acquire images of the front end of the optical fiber material, the second vision module 61 is used to acquire images of the coupling area inside the laser 8 from a top-down perspective, and the third vision module 71 is used to acquire images of the coupling area inside the laser 8 from a side-view perspective.

[0094] In some embodiments, the vision mechanism further includes a fourth vision module 74, the optical axis of which is tilted downward toward the coupling region within the laser 8.

[0095] The second visual module 61 is fixedly mounted on the second visual movement adjustment mechanism 62. The third visual module 71 is fixedly mounted on the third visual movement adjustment mechanism 72. The first visual module 51 is fixedly mounted on the first visual movement adjustment mechanism 52. The fourth visual module 74 is fixedly mounted on the fourth visual movement adjustment mechanism 75.

[0096] The third visual movement adjustment mechanism 72 and the fourth visual movement adjustment mechanism 75 are both installed on the column 73, forming an independent pillar visual mechanism.

[0097] The third vision movement adjustment mechanism 72 is capable of driving the third vision module 71 to translate along the fourth, fifth, and sixth axes, with the fourth and fifth axes perpendicular to the sixth axis. The third vision movement adjustment mechanism 72 is also configured to drive the third vision module 71 to rotate around the fifth axis. The sixth axis is defined as the Z-axis.

[0098] The third vision movement adjustment mechanism 72 is also configured to drive the third vision module 71 to translate along the tenth axis, which is parallel to the optical axis of the third vision module 71.

[0099] The fourth vision movement adjustment mechanism 75 is configured to drive the fourth vision module 74 to translate along the seventh, eighth, and ninth axes, with the seventh and eighth axes perpendicular to the ninth axis. The seventh axis is also perpendicular to the eighth axis. Furthermore, the fourth vision movement adjustment mechanism 75 is configured to drive the fourth vision module 74 to rotate around the eighth axis. The ninth axis is defined as the Z-axis.

[0100] The fourth vision movement adjustment mechanism 75 is also configured to drive the fourth vision module 74 to translate along the eleventh axis, which is parallel to the optical axis of the fourth vision module 74.

[0101] This invention uses a linear module to drive the translation of an object and a rotary module to drive its rotation. The linear and rotary modules can be added or removed as needed for various movement and adjustment mechanisms. Different drive methods can be selected for the linear and rotary modules, such as electrically controlled or manually controlled modules. For example, the linear module can be selected as an electric slide, pneumatic slide, or manually controlled linear module, etc.

[0102] In some embodiments, the present invention employs a manually controlled rotating module to drive the vision module to rotate. The manually controlled rotating module includes a first rotating bracket, a second rotating bracket, and a rotating bracket connecting rod. The axis of the rotating bracket connecting rod extends horizontally. The first rotating bracket is fitted onto one end of the rotating bracket connecting rod and fixed by fastening screws or bolts. The second rotating bracket is fitted onto the other end of the rotating bracket connecting rod and fixed by fastening screws or bolts. In other embodiments, the manually controlled rotating module may also employ an angle plate.

[0103] The second visual movement adjustment mechanism 62 and the first visual movement adjustment mechanism 52 are both installed on the gantry 33.

[0104] The second vision movement adjustment mechanism 62 is configured to drive the second vision module 61 to translate along the first axis, the second axis, and the third axis. The second axis and the third axis are perpendicular to the first axis, and the second axis is perpendicular to the third axis (such as the Z axis).

[0105] The first visual movement adjustment mechanism 52 is configured to drive the first visual module 51 to translate along the twelfth, thirteenth, and fourteenth axes, with the twelfth and thirteenth axes perpendicular to each other. Furthermore, the first visual movement adjustment mechanism 52 is configured to drive the first visual module 51 to rotate around a second axis. The fourteenth axis is the Z-axis.

[0106] In some embodiments, the first optical fiber clamp 12 includes a clamp base 121 and a clamp cover plate 122. The clamp cover plate 122 is detachably fixed to the clamp base 121, so that the optical fiber is fastened between the clamp base 121 and the clamp cover plate 122. The clamp base 121 is provided with a groove 123 for accommodating the optical fiber. The clamp base 121 is rotatably supported on a clamp support 124. A fastening device for fastening the clamp base 121 is connected to the clamp support 124. The clamp support 124 is fixedly connected to the first optical fiber movement adjustment mechanism 11.

[0107] In some embodiments, the first fiber movement adjustment mechanism 11 is configured to at least drive the first fiber clamp 12 to translate along a first axis, which is parallel to the fiber.

[0108] The first fiber optic movement adjustment mechanism 11 is a four-axis displacement stage.

[0109] In some embodiments, the first fiber optic movement adjustment mechanism 11 is configured to drive the first fiber optic clamp 12 to translate along a first axis, a second axis, and a third axis, wherein the second and third axes are perpendicular to the first axis, and the second axis is perpendicular to the third axis (e.g., the Z-axis). Furthermore, the first fiber optic movement adjustment mechanism 11 is configured to drive the first fiber optic clamp 12 to rotate around the first axis. The first axis is defined as the X-axis, the second axis as the Y-axis, and the third axis as the Z-axis.

[0110] In some embodiments, one end of the clamp base 121 is connected to the rotating handle 126. The rotating handle 126 is also provided with a groove for accommodating optical fibers.

[0111] In some embodiments, one end of the clamp base is connected to a rotary drive device for driving the clamp base to rotate. The rotary drive device may include a motor.

[0112] In some embodiments, the clamp support 124 is provided with a support hole for supporting the clamp base 121, one end of the clamp base 121 is located in the support hole of the clamp support 124, the fastening device includes a fastening screw, the clamp support 124 is provided with a threaded hole 125, one end of the threaded hole 125 communicates with the support hole, and the fastening screw is threadedly engaged with the threaded hole.

[0113] The head of the fastening screw can press against the clamp base 121 inside the support hole of the clamp support 124.

[0114] In some embodiments, the other end of the clamp base 121 is connected to a front support plate 127, and the upper end of the front support plate 127 is provided with a groove for accommodating the front end of the optical fiber.

[0115] In some embodiments, one side of the clamp cover plate 122 is hinged to the clamp base 121, and the other side of the clamp cover plate 122 is connected to the clamp base 121 by bolts.

[0116] In other embodiments, one side of the clamp cover plate 122 is hinged to the clamp base 121, and the other side of the clamp cover plate 122 is connected to the clamp base 121 via an electromagnetic chuck or an electric vacuum chuck.

[0117] In some embodiments, the second fiber optic clamp 22 includes a clamp base plate 221, a movable jaw 222, a fixed jaw 223, and a jaw drive device 224. The fixed jaw 223 is fixedly connected to the clamp base plate 221. A first slide rail slider assembly 225 is fixedly mounted on the clamp base plate 221. The slider of the first slide rail slider assembly 225 is fixedly connected to a movable jaw mounting base 226. The movable jaw mounting base 226 is fixedly connected to the movable jaw 222 and is connected to the jaw drive device 224. A sensing element 231 is fixedly mounted on the movable jaw mounting base 226. A detection device 232 is fixedly mounted on the clamp base plate 221. The detection device 232 includes a detection element that cooperates with the sensing element 231. The detection element is a sensor (such as a photoelectric sensor or a proximity sensor). The sensor 231 moves synchronously with the movement of the fixture (such as the opening and closing of the gripper). When the sensor 231 enters or leaves the detection area of ​​the sensor, the sensor outputs an electrical signal to realize the "position detection of the gripper (such as opening and closing in place, travel limit)". Ultimately, it is used to provide feedback on the action status of the fixture (such as "gripping in place", "releasing in place"), trigger the next action, or prevent overtravel.

[0118] The sensor works in conjunction with the sensing plate 231 to achieve position detection, travel limit / position feedback of the gripper's movement.

[0119] In some embodiments, a second slide rail slider assembly 228 is fixedly mounted on the movable jaw clamp mounting base 226, and the slider of the second slide rail slider assembly 228 is connected to the output shaft of the motor through an upper stop sleeve 229 and a lower stop sleeve 230. A motor mounting plate 227 is fixed on the clamp base plate 221, and the motor is fixed on the motor mounting plate 227.

[0120] In some embodiments, the second fiber optic movement adjustment mechanism 21 is a six-axis displacement stage.

[0121] The second fiber optic movement adjustment mechanism 21 has six degrees of freedom of motion.

[0122] In some embodiments, the stage 4 includes a base 41, a thermoelectric cooling module 42 is fixed on the base 41, a heat-conducting seat 43 is fixed on the thermoelectric cooling module 42, and the laser fixture 45 is fixed on the heat-conducting seat 43.

[0123] The power-on module includes a power-on board 48 and a power-on plate 49. The power-on board 48 has several independent power-on contacts corresponding to different pins of the laser 8. The power-on board 48 is fixed on a pad 410, and the pad 410 is fixed on a heat-conducting seat 43. When the laser 8 is clamped on the laser fixture 45, the pins of the laser 8 are supported on the power-on contacts of the power-on board 48. The power-on plate 49 is located directly above the power-on board 48. The power-on plate 49 is connected to a power-on drive device 411 for driving the power-on plate 49 to rise and fall. The power-on board 48 is electrically connected to a power supply control unit.

[0124] In some embodiments, the electric drive device 411 is a cylinder, which is mounted on the base. The output shaft of the cylinder is connected to one end of the pressure plate drive arm 412, and the other end of the pressure plate drive arm 412 is connected to the voltage plate 49. The pressure plate drive arm 412 is connected to the slider of the third slide rail slider assembly 413, and the slide rail of the third slide rail slider assembly 413 is fixed on the base.

[0125] In some embodiments, the stage 4 further includes a third moving adjustment mechanism 414, and the base is fixedly mounted on the third moving adjustment mechanism 414. The third moving adjustment mechanism 414 is configured to drive the laser fixture 45 to translate along the first axis and the second axis. The third moving adjustment mechanism 414 is a two-axis displacement stage.

[0126] In some embodiments, the heat-conducting base 43 is provided with a pushing mechanism 46, which is located on one side of the laser fixture 45, and a limiting plate 47 is fixed on the other side of the laser fixture 45. The pushing mechanism 46 and the limiting plate 47 are used to limit the laser fixture 45 and the laser 8.

[0127] The pushing mechanism 46 includes a pushing adjustment screw and a pushing block. The pushing block is fixed on the fourth slide rail slider assembly, which is fixed on the pushing base. The pushing adjustment screw is threadedly engaged with the pushing base, and the top of the pushing adjustment screw is connected to the pushing block. The pushing amount of the pushing block is adjusted by rotating the pushing adjustment screw.

[0128] In some embodiments, a heat insulation cover 44 is fixed on the thermoelectric cooling module 42, and the heat insulation cover 44 is provided with an opening for making way for the heat conduction seat 43.

[0129] When the voltage plate 49 is driven to descend and presses the laser 8 pin onto the power-on contact, the power supply control unit outputs preset power to the corresponding contact of the voltage plate 48. The power is conducted to the laser 8 pin through the power-on contact to provide working power for the laser 8.

[0130] The coupling welding process of this invention is as follows:

[0131] Place the optical fiber material in the first optical fiber clamp 12, fasten the clamp cover 122, observe the angle of the front end of the optical fiber material under the first vision module 51, and rotate it to the specified angle.

[0132] Simultaneously, the laser 8 is placed on the intermediate stage 4 and fixed by the laser clamp 45;

[0133] After adjusting the optical fiber material to the specified angle, control the first optical fiber propulsion mechanism 1 to drive the optical fiber material closer to the intermediate stage 4, so that the front end of the optical fiber material passes through the tube shell and enters the coupling area.

[0134] After the front end of the optical fiber material enters the coupling area, the second optical fiber propulsion mechanism 2 is controlled to move to the coupling area to clamp the optical fiber material. At this time, the clamp cover plate 122 is opened, and the second optical fiber propulsion mechanism 2 clamps the front end of the optical fiber material and approaches the laser 8 to perform coupling and light finding.

[0135] After the coupling and light-finding are completed, the welding area position is observed through the second vision module 61. The welding module 32 of the welding mechanism 3 is moved to the welding area and the welding module 32 is rotated so that its top is located in the welding area, i.e. the coupling position of the front end of the optical fiber material, and welding is performed.

[0136] After welding is completed, the welding module 32 is moved back to the ready position, and the welding is checked for qualification through the third vision module 71 and the fourth vision module 74. After the inspection is completed, the coupling welding process is completed.

[0137] Based on the same inventive concept, this disclosure also provides a coupling welding method. This coupling welding method is based on the coupling welding equipment provided in the previous embodiments. For a detailed description of the coupling welding equipment, please refer to the content in the previous embodiments. The coupling welding method includes the following steps:

[0138] After the optical fiber is clamped on the first optical fiber clamp 12, an image of the optical fiber front end is acquired, and the optical fiber front end angle (the optical fiber front end has a bevel) is obtained based on the image of the optical fiber front end. Based on the optical fiber front end angle, the first optical fiber clamp 12 is controlled to rotate the optical fiber to the set angle.

[0139] After the optical fiber is adjusted to the set angle and the laser 8 is clamped on the laser fixture 45 of the stage 4, the first optical fiber propulsion mechanism 1 is controlled to drive the optical fiber closer to the stage 4 and pass the front end of the optical fiber through the laser tube shell 81 into the coupling area.

[0140] After the fiber front end enters the coupling region, the second fiber clamp 22 is controlled to clamp the fiber front end and the first fiber clamp 12 is opened. The second fiber clamp 22 is controlled to hold the fiber front end close to the laser 8 and perform coupling and light finding.

[0141] After the optical coupling is completed, an image of the laser 8 region is acquired. The location of the area to be welded is obtained based on the image of the laser 8 region. Based on the identified location of the area to be welded, the welding module 32 of the welding mechanism 3 is controlled to move to the location of the area to be welded, and the optical fiber is welded to the laser 8.

[0142] Laser 8 emits light and outputs it through optical fiber. The coupling and light-finding process includes: controlling the second optical fiber clamp 22 to hold the front end of the optical fiber close to laser 8, and acquiring the optical power output after coupling through the optical fiber. If the optical power meets the standard, the coupling and light-finding process is complete.

[0143] The above-described solution of this invention integrates coupling and welding functions into one unit, reducing intermediate steps and improving production efficiency and consistency. A single device completes all processes, including fiber clamping, position adjustment, fiber optic coupling, and welding. It is compatible with various types of lasers and optical fibers, making it widely applicable. Furthermore, this invention employs a dual-fiber propulsion mechanism to provide precise multi-angle adjustments. The first fiber is responsible for precise insertion, while the second fiber is responsible for fine-tuning the fiber optic connection, ensuring the optimal coupling position and significantly improving the coupling success rate. An independent moving adjustment mechanism allows the optical fiber to precisely approach the laser from different directions, further enhancing the coupling success rate. A high-precision welding mechanism precisely controls the weld point position, and low-heat-affected zone welding technology ensures that the fiber performance is not damaged, resulting in stable and reliable weld quality. This invention utilizes a high-precision moving adjustment mechanism in conjunction with a visual monitoring system to achieve high-precision positioning.

[0144] The above description is only a preferred embodiment of the present invention and is 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 within the protection scope of the present invention.

Claims

1. A coupling welding device, characterized in that, include: A stage, on which a laser fixture is mounted, the laser fixture being configured to fix the laser. A power supply module configured to power the laser; The first optical fiber propulsion mechanism includes a first optical fiber movement adjustment mechanism, on which a first optical fiber clamp is installed. The first optical fiber propulsion mechanism is configured to clamp the optical fiber, drive the optical fiber closer to or away from the stage, so that the front end of the optical fiber extends into the laser tube housing and enters the coupling region. The second fiber propulsion mechanism includes a second fiber movement adjustment mechanism, on which a second fiber clamp is installed. The second fiber propulsion mechanism is configured to hold the fiber and drive the fiber tip to approach the laser for coupling and light finding. A welding mechanism configured to weld optical fibers to a laser.

2. The coupling welding equipment as described in claim 1, characterized in that: It also includes a vision mechanism, which is configured to acquire images of the coupling area inside the laser and the front end of the optical fiber material, and transmit the images to the control unit. The control unit is electrically connected to the vision mechanism, the first optical fiber movement adjustment mechanism, the second optical fiber movement adjustment mechanism, and the welding mechanism, respectively.

3. The coupling welding equipment as described in claim 2, characterized in that: The vision mechanism includes: The first vision module has its optical axis tilted downwards, facing the front end of the optical fiber material; or / and, The second vision module has its optical axis set vertically downwards, facing the coupling region inside the laser; or / and, The third vision module has its optical axis tilted downwards, facing the coupling area inside the laser.

4. The coupling welding equipment as described in claim 1, characterized in that: The first optical fiber clamp includes a clamp base and a clamp cover plate. The clamp cover plate is detachably fixed to the clamp base, so that the optical fiber is fastened between the clamp base and the clamp cover plate. The clamp base is provided with a groove for accommodating the optical fiber. The clamp base is rotatably supported on a clamp support. A fastening device for fastening the clamp base is connected to the clamp support. The clamp support is fixedly connected to the first optical fiber movement adjustment mechanism. And / or, The first optical fiber movement adjustment mechanism is configured to at least drive the first optical fiber clamp to translate along the first axis, which is parallel to the optical fiber.

5. The coupling welding equipment as described in claim 4, characterized in that: One end of the clamp base is connected to the rotating handle; And / or, The clamp support is provided with a support hole for supporting the clamp base. One end of the clamp base is located in the support hole of the clamp support. The fastening device includes a fastening screw. The clamp support is provided with a threaded hole. One end of the threaded hole communicates with the support hole. The fastening screw is threadedly engaged with the threaded hole.

6. The coupling welding equipment as described in claim 1, characterized in that: The second fiber optic clamp includes a clamp base plate, a movable jaw, a fixed jaw, and a jaw drive device. The fixed jaw is fixedly connected to the clamp base plate. A first slide rail slider assembly is fixedly mounted on the clamp base plate. The slider of the first slide rail slider assembly is fixedly connected to the movable jaw mounting base. The movable jaw mounting base is fixedly connected to the movable jaw. The movable jaw mounting base is connected to the jaw drive device.

7. The coupling welding equipment as described in claim 1 or 6, characterized in that: The second fiber optic movement adjustment mechanism is a six-axis displacement stage.

8. The coupling welding equipment as described in claim 1, characterized in that: The welding mechanism includes a welding module, which is fixedly mounted on the welding movement and adjustment mechanism.

9. The coupling welding equipment as described in claim 1, characterized in that: The stage includes a base, on which a thermoelectric cooling module is fixed, and on which a heat-conducting seat is fixed, and the laser fixture is fixed on the heat-conducting seat; The power-on module includes a power-on board and a power-on plate. The power-on board has several independent power-on contacts corresponding to different pins of the laser. The power-on board is fixed on a pad, and the pad is fixed on a heat-conducting base. When the laser is clamped on the laser fixture, the laser pins are supported on the power-on contacts of the power-on board. The power-on plate is located directly above the power-on board. The power-on plate is connected to a power-on drive device for driving the power-on plate to rise and fall. The power-on board is electrically connected to a power supply control unit.

10. A coupling welding method, characterized in that, Includes the following steps: After the optical fiber is clamped on the first optical fiber clamp, an image of the optical fiber front end is acquired, the optical fiber front end angle is obtained based on the image, and the first optical fiber clamp is controlled to rotate the optical fiber to the set angle based on the optical fiber front end angle. After the optical fiber is adjusted to the set angle and the laser is already clamped on the laser fixture of the stage, the first optical fiber propulsion mechanism is controlled to drive the optical fiber closer to the stage and pass the front end of the optical fiber through the laser tube shell into the coupling area. After the fiber front end enters the coupling region, the second fiber clamp is controlled to clamp the fiber front end and the first fiber clamp is opened. The second fiber clamp is then controlled to hold the fiber front end close to the laser and perform coupling and light finding. After the laser coupling is completed, an image of the laser area is acquired. The location of the area to be welded is obtained based on the image of the laser area. Based on the identified location of the area to be welded, the welding module of the welding mechanism is controlled to move to the location of the area to be welded, and the optical fiber is welded to the laser.

Images