A multi-dimensionally adjustable in-situ laser welding device

Abstract

The present invention discloses a multi-dimensionally adjustable in-situ laser welding device, comprising a mechanical actuator, a connecting rod mechanism, a rotation module, a welding head module, and a focus indication module connected in sequence from front to back. The welding head module comprises a first welding head module cavity, a mounting seat body, a ratchet turntable mechanism, and an optical fiber connector, a collimating lens, an optical path adjustment lens, a focusing lens, and a protective lens arranged in sequence along the laser light path emission direction in the first welding head module cavity; the mounting seat body is connected to the driving end of the rotation module, and the mounting seat body is connected to the first welding head module cavity via the ratchet turntable mechanism. The present invention can achieve multi-dimensional adjustment of the welding position, reduce the risk of mechanical interference, increase the coverage of the welding operation, and ensure welding quality. The present invention can quickly confirm the posture of the welding head module through the focus indication module, effectively reducing the preparation time before welding and improving processing efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of in-situ welding, and in particular relates to a multi-dimensionally adjustable in-situ laser welding device. Background Art

[0002] Unlike traditional welded parts manufacturing, in-situ welding technology utilizes high-energy beams such as lasers to perform welding during the component assembly phase, achieving coordinated integration of the in-situ welding process and assembly technology for the target parts, significantly shortening the component manufacturing cycle. In-situ welding does not use traditional positioners, does not change the posture of the welded parts, and relies solely on the execution end to complete all welds. Laser welding has high energy density, concentrated heating, minimal thermal damage to the material, a large weld depth-to-width ratio, low residual stress in the welded joint, and high welding precision, which can significantly reduce the amount of post-weld processing. The welding equipment is easy to integrate, automate, and be flexible, and has the significant characteristics of high energy density, high welding precision, and high welding efficiency. The welding quality is comparable to that of electron beam welding, but does not require a vacuum environment.

[0003] In the aviation manufacturing sector, laser in-situ welding targets titanium alloy frame beam structural components for aircraft, performed during the assembly phase. Especially for in-situ welding of complex aerospace components, the complex and intertwined fixtures used for positioning components further complicate access to the welding head module. Conventional laser welding head modules, clamped solely by a robot's mechanical arm, are prone to interference, making full weld coverage impossible. Currently, in-situ welding of aircraft frame beam joints represents a new manufacturing technology, and existing laser welding tips cannot fully meet these requirements.

[0004] Therefore, a flexible and adjustable welding end is needed to avoid interference with the part body and tooling fixtures, and to ensure the accessibility of the welding head module under complex frame beam skeleton structure welding conditions, so as to solve the shortcomings of the existing technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-dimensionally adjustable in-situ laser welding device to solve the above problems.

[0006] The present invention is mainly achieved through the following technical solutions:

[0007] A multi-dimensionally adjustable in-situ laser welding device includes a mechanical actuator, a connecting rod mechanism, a rotation module, a welding head module, and a focus indication module connected in sequence from front to back, wherein the rotation module is used to drive the welding head module to rotate; the welding head module includes a first welding head module cavity, a mounting seat body, a ratchet turntable mechanism, an optical fiber connector, and a lens mechanism, wherein the lens mechanism includes a collimating lens, an optical path adjustment lens, a focusing lens, and a protective lens arranged in sequence along the laser light path emission direction, and the focusing lens and the protective lens are coaxially arranged; an optical fiber connector is provided at the top of the first welding head module cavity, and a lens mechanism is installed inside, and a focus indication module is provided at the end of the first welding head module cavity; the mounting seat body is connected to the first welding head module cavity through a ratchet turntable mechanism, and the ratchet turntable mechanism is used to make the first welding head module cavity rotate unidirectionally along the axis of the focusing lens, and the mounting seat body is connected to the driving end of the rotation module.

[0008] In order to better realize the present invention, further, the side wall of the first welding head module cavity is provided with a water cooling layer, and the outside of the first welding head module cavity is correspondingly provided with a water cooling joint connected to the water cooling layer, and the water cooling joint is connected to the water cooling circulation mechanism.

[0009] In order to better realize the present invention, further, the interior of the first welding head module cavity is fixedly installed with a collimating lens, an optical path adjustment lens, a focusing lens, and a protective lens through an installation bracket, a water-cooling channel is provided in the installation bracket, and the side wall of the first welding head module cavity is correspondingly provided with a water-cooling joint connected to the water-cooling channel.

[0010] The sidewalls of the first welding head module cavity are provided with multiple water-cooling joints for water inlet and outlet, which are connected to a water cooling circulation mechanism to ultimately regulate the temperature of the lens inside the first welding head module cavity. The water cooling circulation mechanism is prior art and will not be described in detail.

[0011] In order to better implement the present invention, further, the end of the first welding head module cavity is threadedly connected to the focus indication module, and the focus indication module includes a threaded connector and a frustum rangefinder. The top of the frustum rangefinder is threadedly connected to the end of the first welding head module cavity through the threaded connector. The frustum rangefinder is coaxially arranged with the focusing lens, and the length of the frustum rangefinder is equal to the focal length of the focusing lens.

[0012] In order to better realize the present invention, further, the rotation module includes a body, a servo motor and a reduction mechanism, the body is provided with a servo motor and a reduction mechanism, the body is connected to the connecting rod mechanism, and the servo motor is connected to the mounting seat body through the reduction mechanism.

[0013] In order to better implement the present invention, the connecting rod mechanism further includes a first connecting arm, several intermediate connecting arms and a second connecting arm connected in sequence, and the free ends of the first connecting arm and the second connecting arm are respectively connected to the rotating module and the mechanical actuator.

[0014] In order to better implement the present invention, the connecting rod mechanism further includes a connecting unit and a connecting flange, and the free end of the second connecting arm is connected to the mechanical actuator through the connecting flange; the first connecting arm and the intermediate connecting arm, the adjacent intermediate connecting arms, and the intermediate connecting arm and the second connecting arm are respectively connected through the connecting unit.

[0015] In order to better implement the present invention, further, the connecting unit includes a locking nut and a connecting shaft, the connecting ends of the first connecting arm, the middle connecting arm, and the second connecting arm are respectively provided with through holes, and the connecting shaft passes through adjacent through holes and is threadedly connected to the locking nut.

[0016] The beneficial effects of the present invention are as follows:

[0017] (1) The present invention can realize 360° rotation of the focus of the laser welding head module, greatly increasing the end accessibility and ensuring that the optical path is perpendicular to the weld, thus ensuring the welding quality. The present invention can realize the overall rotation and adjustment of the laser welding head module, which can effectively avoid interference between the welding head module and the welding parts and fixtures. At the same time, by providing a ratchet turntable mechanism, the present invention can realize the adjustment and fixation of the welding head module at any axial angle position of the ratchet shaft, further avoiding interference, increasing accessibility, and having good practicality.

[0018] (2) Each connecting arm of the connecting rod mechanism can be rotated and fixed at any angle. By setting up multiple connecting arms, the connecting rod mechanism can be adjusted to any multi-segment line shape as needed, which can greatly avoid interference with the in-situ welding object and its clamping tooling. It has strong versatility and can adapt to parts and fixtures of different shapes. At the same time, the connecting rod mechanism can increase the length of the connecting rod mechanism as needed by adjusting the number of connecting arm structural units, thereby increasing the coverage range of the welding end, which has good practicality.

[0019] (3) The present invention uses a focus indication module to quickly confirm the posture of the welding head module and adjust a reasonable welding position, which can effectively reduce the preparation time before welding and improve processing efficiency;

[0020] (4) The present invention can realize the rotation of the welding head module through the rotating module, and can realize the unidirectional rotation of the first welding head module cavity along the focusing lens axis to any angle and fix it through the ratchet turntable mechanism; through the connecting rod mechanism, it can realize flexible connection with the mechanical actuator. The present invention can realize multi-dimensional adjustment of the welding position, improve the flexibility of operation, increase the coverage of welding operation, reduce the risk of mechanical interference, and ensure the welding quality. The present invention confirms the posture of the welding head module through the focus indication module, can quickly adjust the reasonable welding position, can effectively reduce the preparation time before welding, and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the welding device of the present invention;

[0022] Figure 2 It is a structural diagram of the welding head module;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 It is a structural diagram of the connecting rod mechanism;

[0025] Figure 5 Schematic diagram of the structure of the connection unit.

[0026] Among them: 1. Welding head module; 2. Focus indication module; 3. Rotation module; 4. Linkage mechanism;

[0027] 11. First welding head module cavity; 12. Mounting seat; 13. Ratchet turntable mechanism;

[0028] 111. Fiber optic connector; 112. Collimating lens; 113. Water cooling connector; 114. Optical path adjustment lens; 115. Focusing lens; 116. Protective lens;

[0029] 21. Threaded connector; 22. Round table distance ruler;

[0030] 41. First connecting arm; 42. Second connecting arm; 43. Intermediate connecting arm; 44. Connecting unit; 441. Locking nut; 442. Connecting shaft; 45. Connecting flange. DETAILED DESCRIPTION

[0031] Example 1:

[0032] A multi-dimensionally adjustable in-situ laser welding device, such as Figure 1-Figure 3As shown, it includes a mechanical actuator, a connecting rod mechanism 4, a rotating module 3, a welding head module 1, and a focus indication module 2 connected in sequence from front to back. The rotating module 3 is used to drive the welding head module 1 to rotate; the welding head module 1 includes a first welding head module cavity 11, a mounting seat body 12, a ratchet turntable mechanism 13, an optical fiber connector 111, and a lens mechanism. The lens mechanism includes a collimating lens 112, an optical path adjustment lens 114, a focusing lens 115, and a protective lens 116 arranged in sequence along the emission direction of the laser light path. The focusing lens 115 and the protective lens 116 are coaxially arranged; a fiber optic connector 111 is provided at the top of the first welding head module cavity 11, and a lens mechanism is installed inside, and a focus indication module 2 is provided at the end of the first welding head module cavity 11; the mounting seat body 12 is connected to the first welding head module cavity 11 through a ratchet turntable mechanism 13, and the ratchet turntable mechanism 13 is used to make the first welding head module cavity 11 rotate unidirectionally along the axis of the focusing lens 115, and the mounting seat body 12 is connected to the driving end of the rotating module 3.

[0033] Preferably, if Figure 2 As shown, the collimating lens 112, optical path adjustment lens 114, focusing lens 115, and protective lens 116 are fixedly mounted inside the first welding head module cavity 11 via mounting brackets. A water cooling channel is provided inside the mounting bracket, and a water cooling joint 113 communicating with the water cooling channel is correspondingly provided on the side wall of the first welding head module cavity 11. The water cooling joint 113 is connected to a water cooling circulation mechanism.

[0034] Preferably, if Figure 4 As shown, the connecting rod mechanism 4 includes a first connecting arm 41, several intermediate connecting arms 43 and a second connecting arm 42 connected in sequence. The free ends of the first connecting arm 41 and the second connecting arm 42 are connected to the rotating module 3 and the mechanical actuator respectively.

[0035] Preferably, if Figure 4 As shown, the connecting rod mechanism 4 also includes a connecting unit 44 and a connecting flange 45. The free end of the second connecting arm 42 is connected to the mechanical actuator through the connecting flange 45; the first connecting arm 41 and the intermediate connecting arm 43, the adjacent intermediate connecting arms 43, and the intermediate connecting arm 43 and the second connecting arm 42 are respectively connected through the connecting unit 44.

[0036] Preferably, if Figure 5 As shown, the connecting unit 44 includes a locking nut 441 and a connecting shaft 442. The connecting ends of the first connecting arm 41, the middle connecting arm 43, and the second connecting arm 42 are respectively provided with through holes. The connecting shaft 442 passes through adjacent through holes and is threadedly connected to the locking nut 441.

[0037] The present invention enables rotation of the welding head module 1 through the rotation module 3, and the first welding head module cavity 11 can be unidirectionally rotated to any angle along the focusing lens axis and fixed through the ratchet turntable mechanism 13. Flexible connection with the mechanical actuator is achieved through the connecting rod mechanism 4. This allows for multi-dimensional adjustment of the welding position, improving operational flexibility, increasing the coverage of welding operations, reducing the risk of mechanical interference, and ensuring welding quality. The present invention uses the focus indication module 2 to confirm the posture of the welding head module 1, allowing for rapid adjustment to a suitable welding position, effectively reducing pre-welding preparation time and improving processing efficiency.

[0038] Example 2:

[0039] A multi-dimensionally adjustable in-situ laser welding device, such as Figure 1-Figure 3 As shown, it includes a mechanical actuator, a connecting rod mechanism 4, a rotation module 3, a welding head module 1, and a focus indication module 2, which are connected in sequence from front to back. The welding head module 1 includes a first welding head module cavity 11, a mounting base 12, a ratchet turntable mechanism 13, an optical fiber connector 111, and a lens mechanism. The lens mechanism includes a collimating lens 112, an optical path adjustment lens 114, a focusing lens 115, and a protective lens 116, which are sequentially arranged along the laser light path emission direction. The focusing lens 115 and the protective lens 116 are coaxially arranged. The optical fiber connector 111 is provided at the top of the first welding head module cavity 11, and the lens mechanism is installed inside.

[0040] like Figure 2 As shown, the mounting base 12 is connected to the first welding head module cavity 11 through a ratchet turntable mechanism 13, and the ratchet turntable mechanism 13 is used to make the first welding head module cavity 11 rotate unidirectionally along the axis of the focusing lens 115. Figure 1 As shown, the rotating module 3 is used to drive the welding head module 1 to rotate. The rotating module 3 includes a main body, a servo motor and a reduction mechanism. The servo motor and the reduction mechanism are provided on the main body. The main body is connected to the connecting rod mechanism 4, and the servo motor is connected to the mounting seat body 12 through the reduction mechanism.

[0041] like Figure 2 As shown, the end of the first welding head module cavity 11 is threadedly connected to the focus indication module 2, and the focus indication module 2 includes a threaded connector 21 and a truncated cone distance scale 22. The top of the truncated cone distance scale 22 is threadedly connected to the end of the first welding head module cavity 11 through the threaded connector 21. The truncated cone distance scale 22 is coaxially arranged with the focusing lens 115, and the length of the truncated cone distance scale 22 is equal to the focal length of the focusing lens 115.

[0042] Preferably, a water cooling layer is provided on the side wall of the first welding head module cavity 11 , and a water cooling joint 113 communicating with the water cooling layer is correspondingly provided on the outer side of the first welding head module cavity 11 , and the water cooling joint 113 is connected to a water cooling circulation mechanism.

[0043] The present invention enables rotation of the welding head module 1 through the rotation module 3, and the first welding head module cavity 11 can be unidirectionally rotated to any angle along the focusing lens axis and fixed through the ratchet turntable mechanism 13. Flexible connection with the mechanical actuator is achieved through the connecting rod mechanism 4. This allows for multi-dimensional adjustment of the welding position, improving operational flexibility, increasing the coverage of welding operations, reducing the risk of mechanical interference, and ensuring welding quality. The present invention uses the focus indication module 2 to confirm the posture of the welding head module 1, allowing for rapid adjustment to a suitable welding position, effectively reducing pre-welding preparation time and improving processing efficiency.

[0044] Example 3:

[0045] A multi-dimensionally adjustable in-situ laser welding device, such as Figure 1-Figure 5 As shown, the present invention effectively avoids interference between the welding tip and the welded parts and welding fixtures when faced with complex in-situ welding and their assembly, ensuring the accessibility of the welding tip. The present invention includes: a welding head module 1 that performs laser optical collimation and focusing; a focus indication module 2 that determines the posture of the welding head module 1; a rotation module 3 that adjusts the position of the welding head module 1; and a flexible and adjustable linkage mechanism 4 that connects the welding head module 1 to the end of the mechanical actuator.

[0046] Preferably, if Figure 2 As shown, the welding head module 1 includes a first welding head module cavity 11, a mounting seat 12, and a ratchet turntable mechanism 13. Along the emission direction of the laser light path, the optical fiber connector 111, the collimating lens 112, the optical path adjustment lens 114, the focusing lens 115, and the protective lens 116 are sequentially arranged on the first welding head module cavity 11. Each lens is installed through a mounting bracket. The mounting bracket has a built-in water-cooling channel, and each lens is cooled by circulating cooling water. A water-cooling joint 113 is provided on the outside of the cavity. A thread is provided at the end of the first welding head module cavity 11, which can be mechanically connected to the focus indication module 2 through a threaded connection and can be quickly disassembled and assembled, and the position of the thread end is parallel to the center of the focusing lens 115. A ratchet mechanical mechanism is provided inside the ratchet turntable mechanism 13, which can make the first welding head module cavity 11 rotate unidirectionally to any angle along the focusing lens axis and be fixed.

[0047] Preferably, if Figure 2 、 Figure 3As shown, the focus indicator module 2 includes a threaded connector 21 and a truncated cone distance scale 22. The threaded connector 21 is provided with internal threads that connect with the external threads provided on the welding head module 1, enabling quick assembly and disassembly. The length of the truncated cone distance scale 22 is the focal length of the focusing lens 115.

[0048] Preferably, the rotation module 3 includes a servo motor and a reduction mechanism for driving the welding head module 1 to achieve infinitely controllable rotation along the axial direction. The rotation module 3 is provided with an aviation plug for electrically connecting to an external control system. The rotation module 3 is mechanically connected to the welding head module 1 and the connecting rod mechanism 4 by bolts.

[0049] Preferably, if Figure 4 、 Figure 5 As shown, the connecting rod mechanism 4 includes a first connecting arm 41, a second connecting arm 42, and several intermediate connecting arms 43. The front end of the first connecting arm 41 is mechanically connected to the rotating module 3 by bolts, and a through hole is provided on the end of the first connecting arm 41. The end of the second connecting arm 42 is mechanically connected to the connecting flange 45 by bolts, and a through hole is provided on the front end of the second connecting arm 42. Through holes are provided at both ends of the intermediate connecting arm 43, and two adjacent connecting arms are connected by the connecting unit 44. The connecting unit 44 includes a locking nut 441 and a connecting shaft 442. The locking nut 441 and the connecting shaft 442 are both provided with threads. The connecting shaft 442 passes through the through holes of two adjacent connecting arms and is connected to the locking nut 441. The adjacent connecting arms are tightened by rotating the locking nut 441. The connecting flange 45 is used to complete the connection between the end of the second connecting arm 42 and the end of the mechanical actuator.

[0050] A method for in-situ laser welding of complex metal structures is implemented using the above-mentioned device and includes the following steps:

[0051] S1: First, complete the mechanical connection of the welding head module 1, the focus indication module 2, the rotation module 3, and the connecting rod mechanism 4.

[0052] S2: Complete the clamping of the parts to be welded, select the weld to be welded, and place the top end of the focus indicator module 2 close to the center of the weld.

[0053] S3: Rotate the ratchet turntable mechanism 13 to adjust the welding head module 1 to a suitable position to avoid interference between the mounting base 12 of the welding head module 1 and the parts to be welded and the matching clamping tooling.

[0054] S4: Complete the angle adjustment of the rotating module 3, adjust the first connecting arm 41 of the connecting rod mechanism 4 to a suitable position, avoid interference between the first connecting arm 41 and the parts to be welded and the matching clamping tooling, and complete the posture confirmation of the welding head module 1.

[0055] S5: Complete the installation of the connecting rod mechanism 4, adjust each connecting arm to the appropriate position, avoid interference between the connecting rod mechanism 4 and the parts to be welded and the supporting clamping tooling, and complete the binding and fixation of the laser fiber and the connecting rod mechanism 4.

[0056] S6: Remove the focus indication module 2 and start welding operation.

[0057] Compared with the existing laser welding head module 1, the present invention can realize 360° rotation of the focus of the laser welding head module 1, greatly increasing the end accessibility and ensuring that the optical path is perpendicular to the weld, ensuring the welding quality; realizing the adjustable rotation of the overall posture of the laser welding head module 1, which can effectively avoid the interference of the welding head module 1 with the welding parts and fixtures. At the same time, the present invention can realize the adjustment and fixation of the welding head module 1 at any angular position of the ratchet shaft axis by setting a ratchet turntable mechanism 13, further avoiding interference and increasing accessibility. The connecting arms of the connecting rod mechanism 4 can be rotated and fixed at any angle. By setting multiple connecting arms and reasonably setting the length of the connecting arms, the connecting rod mechanism 4 can be adjusted to any multi-segment line shape as required, which can greatly avoid interference with the in-situ welding object and its clamping tooling. It has strong versatility and can adapt to parts and fixtures of different shapes. At the same time, the connecting rod mechanism 4 can increase the length of the connecting rod mechanism 4 as needed by adjusting the number of connecting arm structural units to increase the coverage range of the welding end. The focus indication module 2 can quickly confirm the posture of the welding head module 1 and adjust a reasonable welding position. Compared with the existing method of confirming the focal length through a sensor, it can effectively reduce the preparation time before welding and improve processing efficiency.

[0058] Example 4:

[0059] A multi-dimensionally adjustable in-situ laser welding device, such as Figure 1-Figure 5As shown, it includes a connecting rod mechanism 4, a rotating module 3, a welding head module 1, and a focus indication module 2. The welding head module 1 is mechanically connected to the focus indication module 2, and can be quickly disassembled and assembled by a threaded connection. The welding head module 1 includes a first welding head module cavity 11, a mounting seat body 12, and a ratchet turntable mechanism 13. Along the emission direction of the laser light path, an optical fiber connector 111, a collimating lens 112, an optical path adjustment lens 114, a focusing lens 115, and a protective lens 116 are sequentially arranged on the first welding head module cavity 11. Each lens is installed through a mounting bracket, and the mounting bracket has a built-in water-cooling channel. Each lens is cooled by circulating cooling water, and a water-cooling joint 113 is provided on the outside of the cavity. A thread is provided at the end of the first welding head module cavity 11, which can be mechanically connected to the focus indication module 2 through a threaded connection and can be quickly disassembled and assembled, and the position of the end of the thread is parallel to the center of the focusing lens 115. The ratchet turntable mechanism 13 is internally provided with a ratchet mechanical mechanism, which can make the first welding head module cavity 11 rotate unidirectionally to any angle along the focusing lens axis and then be fixed.

[0060] like Figure 2 、 Figure 3 As shown, the focus indicator module 2 includes a threaded connector 21 and a truncated cone distance scale 22. The threaded connector 21 is provided with an internal thread that connects to the external thread provided on the welding head module 1, allowing for quick assembly and disassembly. The length of the truncated cone distance scale 22 is the focal length of the focusing lens 115.

[0061] The rotation module 3 includes a servo motor and a reduction mechanism, which are used to drive the welding head module 1 to achieve infinitely controllable rotation along the axial direction. The rotation module 3 is equipped with an aviation plug for electrical connection to an external control system. The rotation module 3 is mechanically connected to the welding head module 1 and the connecting rod mechanism 4 via bolts.

[0062] like Figure 4 、 Figure 5As shown, the connecting rod mechanism 4 includes a first connecting arm 41, a second connecting arm 42, and several intermediate connecting arms 43. The front end of the first connecting arm 41 is mechanically connected to the rotating module 3 by bolts, and a through hole is provided on the end of the first connecting arm 41. The end of the second connecting arm 42 is mechanically connected to the connecting flange 45 by bolts, and a through hole is provided on the front end of the second connecting arm 42. Through holes are provided at both ends of the intermediate connecting arm 43, and two adjacent connecting arms are connected by the connecting unit 44. The connecting unit 44 includes a locking nut 441 and a connecting shaft 442. The connecting end surfaces of the locking nut 441 and the connecting shaft 442 are both provided with threads. The connecting shaft 442 passes through the through holes of two adjacent connecting arms and is connected to the locking nut 441. The adjacent connecting arms are tightened by rotating the locking nut 441. The connecting flange 45 is used to complete the connection between the second connecting arm 42 and the end of the robot.

[0063] The fiber optic connector 111 of the present invention is a QBH interface, wherein the focal length of the focusing lens is selected to be 250mm. The water-cooled connector 113 provided outside the cavity is Φ6mm in size. The frustum distance scale 22 is 250mm long. The rotation speed of the rotation module 3 is 1r / min; the first connecting arm 41 is 300mm long, the second connecting arm 42 is 300mm long, and three intermediate connecting arms 43 are provided, each 200mm long. The interface form of the provided connecting flange 45 is consistent with the connecting flange 45 of the KUKA robot KR702100.

[0064] During use of the present invention, the mechanical connection of the welding head module 1, the focus indication module 2, the rotation module 3, and the connecting rod mechanism 4 is first completed. Then, the clamping of the titanium alloy parts to be welded is completed, the weld to be welded is selected, and the top of the focus indication module 2 is placed close to the center of the weld. The ratchet turntable mechanism 13 is rotated to adjust the welding head module 1 to a suitable position to avoid interference between the mounting base 12 of the welding head module 1 and the parts to be welded and the matching clamping tooling. The angle adjustment of the rotation module 3 is completed, and the first connecting arm 41 of the connecting rod mechanism 4 is adjusted to a suitable position to avoid interference between the first connecting arm 41 and the parts to be welded and the matching clamping tooling. The posture of the welding head module 1 is confirmed. The installation of the connecting rod mechanism 4 is completed, and each connecting arm is adjusted to a suitable position to avoid interference between the connecting rod mechanism 4 and the parts to be welded and the matching clamping tooling, and the laser optical fiber is tied and fixed to the connecting rod mechanism 4. Finally, the focus indication module 2 is removed, and the welding operation on the titanium alloy parts can be started.

[0065] In summary, the present invention provides a multi-dimensionally adjustable laser welding tip for in-situ laser welding of complex metal structures. This allows for flexible adjustment of the position of the welding tip to meet the welding requirements of complex in-situ welding parts and their assembly fixtures, effectively avoiding interference between the welding tip and the welding parts and the welding fixture. This provides strong adaptability and ensures the accessibility of the welding tip. The present invention utilizes a focus indicator module 2 to quickly confirm the posture of the welding head module 1 and adjust the appropriate welding position, effectively reducing pre-welding preparation time and improving processing efficiency.

[0066] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A multi-dimensionally adjustable in-situ laser welding device, characterized in that: The invention comprises a mechanical actuator, a connecting rod mechanism (4), a rotation module (3), a welding head module (1), and a focus indication module (2) connected in sequence from front to back, wherein the rotation module (3) is used to drive the welding head module (1) to rotate; the welding head module (1) comprises a first welding head module cavity (11), a mounting seat body (12), a ratchet turntable mechanism (13), an optical fiber connector (111), and a lens mechanism, wherein the lens mechanism comprises a collimating lens (112), an optical path adjustment lens (114), a focusing lens (115), and a protective lens (116) arranged in sequence along the emission direction of the laser light path, The focusing lens (115) and the protective lens (116) are coaxially arranged; the top of the first welding head module cavity (11) is provided with an optical fiber connector (111), and a lens mechanism is installed inside; the end of the first welding head module cavity (11) is provided with a focus indication module (2); the mounting seat body (12) is connected to the first welding head module cavity (11) through a ratchet turntable mechanism (13); the ratchet turntable mechanism (13) is used to make the first welding head module cavity (11) rotate unidirectionally along the axis of the focusing lens (115); the mounting seat body (12) is connected to the driving end of the rotation module (3).

2. A multi-dimensionally adjustable in-situ laser welding device according to claim 1, characterized in that: A water cooling layer is provided on the side wall of the first welding head module cavity (11), and a water cooling joint (113) communicating with the water cooling layer is correspondingly provided on the outside of the first welding head module cavity (11), and the water cooling joint (113) is connected to a water cooling circulation mechanism.

3. The multi-dimensionally adjustable in-situ laser welding device according to claim 1, characterized in that: A collimating lens (112), an optical path adjustment lens (114), a focusing lens (115), and a protective lens (116) are fixedly mounted inside the first welding head module cavity (11) via mounting brackets, a water cooling channel is provided inside the mounting bracket, and a water cooling joint (113) communicating with the water cooling channel is correspondingly provided on the side wall of the first welding head module cavity (11).

4. A multi-dimensionally adjustable in-situ laser welding device according to any one of claims 1 to 3, characterized in that: The end of the first welding head module cavity (11) is threadedly connected to the focus indication module (2), and the focus indication module (2) comprises a threaded connector (21) and a truncated cone distance measuring ruler (22). The top of the truncated cone distance measuring ruler (22) is threadedly connected to the end of the first welding head module cavity (11) via the threaded connector (21). The truncated cone distance measuring ruler (22) is coaxially arranged with the focusing lens (115), and the length of the truncated cone distance measuring ruler (22) is equal to the focal length of the focusing lens (115).

5. The multi-dimensionally adjustable in-situ laser welding device according to claim 1, characterized in that: The rotating module (3) comprises a body, a servo motor and a reduction mechanism; the servo motor and the reduction mechanism are provided on the body; the body is connected to a connecting rod mechanism (4); and the servo motor is connected to a mounting seat body (12) via the reduction mechanism.

6. The multi-dimensionally adjustable in-situ laser welding device according to claim 1, characterized in that: The connecting rod mechanism (4) comprises a first connecting arm (41), a plurality of intermediate connecting arms (43), and a second connecting arm (42) connected in sequence, wherein the free ends of the first connecting arm (41) and the second connecting arm (42) are respectively connected to the rotating module (3) and the mechanical actuator.

7. The multi-dimensionally adjustable in-situ laser welding device according to claim 6, characterized in that: The connecting rod mechanism (4) further comprises a connecting unit (44) and a connecting flange (45); the free end of the second connecting arm (42) is connected to the mechanical actuator via the connecting flange (45); the first connecting arm (41) and the intermediate connecting arm (43), the adjacent intermediate connecting arms (43), and the intermediate connecting arm (43) and the second connecting arm (42) are respectively connected via the connecting unit (44).

8. The multi-dimensionally adjustable in-situ laser welding device according to claim 7, characterized in that: The connecting unit (44) comprises a locking nut (441) and a connecting shaft (442); the connecting ends of the first connecting arm (41), the middle connecting arm (43), and the second connecting arm (42) are respectively provided with through holes; the connecting shaft (442) passes through adjacent through holes and is threadedly connected to the locking nut (441).

Images