An OCT penetration depth detection assembly and laser oscillation welding apparatus

Abstract

The utility model provides a kind of OCT penetration detection subassembly and laser swing welding equipment, it is related to laser swing welding technical field, OCT penetration detection subassembly includes detection light interface, OCT collimating module, OCT galvanometer module and OCT spectrometer module sequentially arranged from top to bottom along vertical direction;Detection light interface is used to input detection beam and coaxial downward transmission;OCT collimating module is used to change detection beam from divergent state into parallel state, and transmission to OCT galvanometer module;OCT galvanometer module is used to adjust parallel detection beam and transmission to OCT spectrometer module;OCT spectrometer module is used to adjust the detection beam after reflection to collimating spectrometer module to the right, detection beam and laser same optical path transmission to the right inside galvanometer module. In the welding process, detection beam and laser beam always synchronous motion, can real-time feedback the depth of welding bath, adjust welding equipment parameter, improve swing welding quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of laser oscillating welding technology, and in particular to an OCT penetration depth detection component and a laser oscillating welding device. Background Technology

[0002] Laser oscillation welding precisely controls the movement path of the laser beam using galvanometers. After collimation and focusing, the laser beam is incident on two motor-controlled galvanometer mirrors. By controlling the deflection of these mirrors through a program, the laser beam can perform high-speed scanning and oscillation along a preset trajectory on the workpiece surface. Due to its superior performance, laser oscillation welding is widely used in the automotive and battery manufacturing industries. During the welding process, the penetration depth is one of the core indicators for measuring weld quality, directly affecting the strength and stability of the weld joint.

[0003] Existing methods for weld penetration testing mainly include cross-sectional methods, macroscopic metallographic methods, ultrasonic testing, electromagnetic wave testing, or other indirect evaluation methods. Some of these methods require damaging the weld, some require high-precision instruments such as microscopes, and some can only be used for indirect evaluation. These methods not only require a lot of labor and time costs, but also make it difficult to guarantee accuracy, real-time performance, and stability. Furthermore, current electron beam weld penetration testing technology generally requires equipment shutdown and the use of other equipment to test the weld, which is inefficient and has significant limitations in the application environment. Utility Model Content

[0004] In view of this, this utility model proposes an OCT penetration depth detection component and a laser oscillating welding device to solve the problems mentioned in the background art regarding the existing penetration depth detection methods, which require a large amount of labor and time costs, and whose accuracy, real-time performance, and stability are difficult to guarantee; and the current electron beam penetration depth detection technology generally requires the equipment to be shut down and other equipment to be used to detect the welded parts, which is inefficient and has a large limitation on the application environment.

[0005] The technical solution of this utility model is implemented as follows: In the first aspect, this utility model provides an OCT penetration depth detection component, which is installed on an oscillating welding equipment. The oscillating welding equipment includes an optical fiber interface, a collimating and splitting module, a galvanometer module, a focusing module, and an air curtain module. After the laser beam enters the collimating and splitting module from the optical fiber interface, it is reflected into the galvanometer module, and then coaxially passes through the focusing module and the air curtain module before finally reaching the surface of the workpiece. The OCT penetration depth detection component includes, from top to bottom along the vertical direction, a detection optical interface, an OCT collimation module, an OCT galvanometer module, and an OCT beam splitter module, wherein: The detection optical interface is used to input the detection beam and transmit it downwards coaxially; The OCT collimation module is used to transform the detection beam from a divergent state to a parallel state and transmit it to the OCT galvanometer module. The OCT galvanometer module is used to adjust the parallel detection beam and then transmit it to the OCT beam splitter module; The OCT beam splitting module is used to reflect the adjusted detection beam to the right to the collimating beam splitting module, and the detection beam and the laser beam are transmitted to the right to the inside of the galvanometer module along the same optical path.

[0006] In some alternative embodiments, preferably, a camera interface module is also included, which is detachably mounted on the side of the OCT beam splitter module, and the oscillating welding equipment also includes a camera mounted on the camera interface module.

[0007] In some alternative implementations, preferably, the OCT beam splitter and the collimating beam splitter use mirrors of different wavelengths.

[0008] In some alternative implementations, preferably, the detection beam used by the OCT penetration depth detection component has a different wavelength band than that of the laser beam.

[0009] Secondly, this utility model provides a laser oscillating welding device, including an optical fiber interface, a collimating and splitting module, a galvanometer module, a focusing module, and an air curtain module, as well as an OCT penetration depth detection component as described in the first aspect. The optical fiber interface is located on the top surface of the collimating and splitting module, the galvanometer module is located on the side of the collimating and splitting module, the focusing module and the air curtain module are coaxially arranged below the galvanometer module, and the detection optical interface is arranged parallel to the optical fiber interface and located on the side of the optical fiber interface away from the galvanometer module.

[0010] In some optional embodiments, preferably, the galvanometer module includes an outer housing, an inner housing, motor mounts, motors, a drive board, an X-ray galvanometer, and a Y-ray galvanometer; the outer housing has an entrance aperture and an exit aperture, the entrance aperture being coaxially connected to the collimating and beam-splitting module, and the exit aperture being coaxially connected to the focusing module; the inner housing has its bottom surface mounted on it; two motor mounts are respectively mounted on the top and rear ends of the inner housing; the two motors are respectively clamped and fixed on the two motor mounts; the drive board is located at the top of the inner housing and is connected to the two motor cables; the X-ray galvanometer and the Y-ray galvanometer are respectively fixed to the ends of the two motors and are both located inside the inner housing.

[0011] In some alternative implementations, preferably, the two motor mounts are positioned at a 15° angle to each other.

[0012] In some optional embodiments, preferably, the collimation and beam splitting module includes a collimation protection mirror drawer module, a collimation water-cooling module, a collimation module, and a beam splitting module arranged coaxially with the fiber optic interface and from top to bottom. The collimation module is used to convert the diverging laser beam into a parallel laser beam and transmit it downward to the beam splitting module. The beam splitting module is connected to the OCT melt depth detection component and the galvanometer module, respectively, and the beam splitting module is used to reflect the parallel laser beam to the right into the galvanometer module.

[0013] In some optional embodiments, preferably, the focusing module includes a base, a focusing lens protective lens drawer module, a focusing water-cooling module, and water pipe connectors; the base and the focusing lens protective lens drawer module are coaxially connected vertically; the focusing water-cooling module is arranged on one side of the base; and two water pipe connectors are disposed on the focusing water-cooling module.

[0014] In some optional embodiments, preferably, the air curtain module includes an annular air blowing module, a side blowing module, and an air pipe connector. The annular air blowing module and the side blowing module are coaxially connected vertically. There are three air pipe connectors, two of which are symmetrically arranged on both sides of the annular air blowing module, and the other air pipe connector is arranged on one side of the side blowing module.

[0015] The OCT penetration depth detection component and laser oscillating welding equipment of this invention have the following advantages over the prior art: (1) The adjusted detection beam is reflected to the right by the OCT beam splitting module and then transmitted to the inside of the galvanometer module along the same optical path as the laser beam. The detection beam and the laser beam are coaxially coupled and illuminate the workpiece together. The depth information of the molten pool can be accurately calculated by the difference between the optical path of the returned detection beam and the reference optical path. During the welding process, the detection beam and the laser beam always move synchronously, which can provide real-time feedback on the depth of the weld pool and adjust the parameters of the welding equipment, thereby improving the quality of oscillating welding. There is no need to stop the machine to inspect the welded workpiece, which greatly improves the efficiency of oscillating welding. (2) The camera interface module can be detachably installed on the side of the OCT beam splitter module. The camera is installed on the camera interface module. The camera collects image information of the workpiece and combines it with OCT penetration depth detection to improve the efficiency and accuracy of detection. In addition, the camera interface module can be removed to reduce the overall size and weight of the equipment and make the overall structure more compact. (3) By selecting mirrors of different wavelengths through the OCT beam splitting module and the collimation beam splitting module, the transmittable and reflective wavelengths of the mirrors are combined to adapt to various welding environments. (4) The laser beam enters from the collimation and beam splitting module, is reflected into the galvanometer module, and then coaxially passes through the focusing module and the air curtain module before finally reaching the workpiece surface. During the welding process, the detection beam of OCT weld depth detection and the laser beam always move synchronously, which can provide real-time feedback on the depth of the weld pool. By using the collimation and beam splitting module to connect the OCT weld depth detection component and the galvanometer module, not only can the laser be connected, but the detection beam and the laser beam can also be transmitted along the same optical path, ensuring the reflectivity of the laser and the transmittance of the detection light. (5) By positioning the two motor mounts at a 15° angle, the X-mirror and Y-mirror are positioned at a 15° angle, allowing the oscillating welding range to reach a large area of ​​15*15mm. This reduces the complexity of the movement trajectory of external mobile devices, covers most weld seams, and completes the oscillating welding work of complex shapes. (6) The collimation module converts the divergent laser beam into a parallel laser beam and transmits it downward to the beam splitting module. The beam splitting module reflects the parallel laser beam to the right into the galvanometer module. The beam splitting module is connected to the OCT melting depth detection component and the galvanometer module respectively. It can not only access the laser, but also make the detection beam and the laser beam transmit in the same optical path, thus ensuring the reflectivity of the laser and the transmittance of the detection light. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the OCT penetration depth detection component in this embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the laser oscillating welding equipment in the embodiments of this utility model; Figure 3 This is a schematic diagram of the collimation and beam splitting module in an embodiment of the present invention; Figure 4 This is a schematic diagram of the galvanometer module in an embodiment of the present invention; Figure 5 This is a schematic diagram of the focusing module in an embodiment of the present utility model; Figure 6 This is a schematic diagram of the air curtain module in an embodiment of the present invention.

[0018] Figure labeling: 1-Detection optical interface, 2-OCT collimation module, 3-OCT galvanometer module, 4-OCT beam splitting module, 5-OCT control module, 6-Camera interface module; 100 - Fiber optic interface, 200 - Collimation and splitting module, 300 - Galvanometer module, 400 - Focusing module, 500 - Air curtain module, 600 - Camera; 201-Collimation protection mirror drawer module, 202-Collimation water-cooling module, 203-Collimation module, 204-Spectroscopy module; 301-Outer housing, 302-Inner housing, 303-Motor mount, 304-Motor, 305-Drive board, 306-X-Glass mirror, 307-Y-Glass mirror; 401-Substrate, 402-Focusing lens protective lens drawer module, 403-Focusing water cooling module, 404-Water pipe connector; 501-Annular air blowing module, 502-Side blowing module, 503-Air pipe connector. Detailed Implementation

[0019] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] First, it's important to clarify that OCT, short for Optical Coherence Tomography, is a non-contact, high-resolution tomographic and biological microscopy imaging device. It can be used for in vivo viewing, axial tomography, and measurement of the posterior segment structures of the eye (including the retina, retinal nerve fiber layer, macula, and optic disc). It is specifically used as a diagnostic tool to aid in the detection and management of eye diseases (including but not limited to macular holes, macular edema, diabetic retinopathy, age-related macular degeneration, and glaucoma). The working principle of OCT is based on Michelson interferometry. Using a superluminescent diode as the light source, the beam passes through an optical fiber coupler and is split into two beams. One beam passes through the eye's refractive medium and reaches the retina, while the other enters a reference system. The reflected or backscattered light from the two paths is recombined into a single beam at the fiber coupler and detected by the detector. The intensity and delay time of backscattering generated by tissues at different depths are measured.

[0021] Reference Figures 1-6As shown, in the first aspect of this utility model, an OCT penetration depth detection component is proposed and installed on an oscillating welding device. The oscillating welding device includes an optical fiber interface 100, a collimating and splitting module 200, a galvanometer module 300, a focusing module 400, and an air curtain module 500. After the laser beam enters the collimating and splitting module 200 from the optical fiber interface 100, it is reflected into the galvanometer module 300, and then coaxially passes through the focusing module 400 and the air curtain module 500 before finally reaching the surface of the workpiece. The OCT penetration depth detection assembly includes, from top to bottom in the vertical direction, a detection optical interface 1, an OCT collimation module 2, an OCT galvanometer module 3, an OCT beam splitter module 4, and an OCT control module 5, wherein: The detection optical interface 1 is used to input the detection beam and transmit it downwards coaxially; the optical fiber of the detection beam is inserted into the detection optical interface 1 and fixed. The OCT collimation module 2 is used to convert the detection beam from a divergent state to a parallel state and transmit it to the OCT galvanometer module 3; The OCT galvanometer module 3 is used to adjust the parallel detection beam and then transmit it to the OCT beam splitter module 4; The OCT beam splitting module 4 is used to reflect the adjusted detection beam to the right to the collimating beam splitting module 200, and the detection beam and the laser are transmitted to the right to the inside of the galvanometer module 300 along the same optical path; The OCT control module 5 is connected to the OCT galvanometer module 3.

[0022] The OCT weld depth detection component proposed in this embodiment reflects the adjusted detection beam to the right to the collimating beam splitting module 200 through the OCT beam splitting module 4. The detection beam and the laser beam are transmitted to the right to the inside of the galvanometer module 300 along the same optical path. The detection beam and the laser beam are coaxially coupled and illuminate the workpiece together. By the difference between the optical path of the returned detection beam and the reference optical path, the depth information of the weld pool can be accurately calculated. During the welding process, the detection beam and the laser beam always move synchronously, which can provide real-time feedback on the depth of the weld pool and adjust the parameters of the welding equipment, thereby improving the quality of oscillating welding. There is no need to stop the machine to inspect the welded workpiece, which greatly improves the efficiency of oscillating welding.

[0023] In some embodiments, the OCT penetration depth detection component further includes a camera interface module 6, which is detachably mounted on the side of the OCT beam splitter module 4. The oscillating welding device also includes a camera 600, which is mounted on the camera interface module 6. Image information of the workpiece is acquired by the camera 600 and combined with OCT penetration depth detection to improve detection efficiency and accuracy. Furthermore, the camera interface module 6 can be removed, reducing the overall size and weight of the device and making the overall structure more compact. The image acquired by the camera 600 and the laser output optical path of the galvanometer module 300 are coaxial and along the same path; that is, the point identified and positioned by the camera 600 34 is the point where the laser needs to be welded, without requiring a change in positional relationship, resulting in high synchronization between positioning and welding.

[0024] In some embodiments, the OCT beam splitter 4 and the collimation beam splitter 200 use mirrors with different wavelengths. This configuration combines the transmittable and reflective wavelengths of the mirrors to adapt to various welding environments.

[0025] In some embodiments, the detection beam used by the OCT penetration depth detection component has a different wavelength band than the laser beam. This configuration reduces interference between the detection beam and the laser beam when they propagate along the same optical path, improving the versatility of the device and the accuracy of the detection.

[0026] The working principle of the OCT penetration depth detection component in this embodiment of the present invention is as follows: Before welding, the optical fiber of the detection beam needs to be inserted into the detection optical interface 1 and fixed. The detection beam is input from the detection optical interface 1 and transmitted downward in the same direction. After passing through the OCT collimation module 2, the detection beam is transformed from a divergent state to a parallel state. The parallel detection beam is transmitted to the OCT beam splitting module 4 after being adjusted and controlled by the OCT galvanometer module 3 and the OCT control module 5. It is then reflected to the right by the OCT beam splitting module 4 to the collimation beam splitting module 200, and transmitted to the inside of the galvanometer module 300 along the same optical path as the laser.

[0027] Based on the same concept, a second aspect of the present invention is described below. Figures 1-6 As shown, a laser oscillating welding device is provided, including an optical fiber interface 100, a collimating and splitting module 200, a galvanometer module 300, a focusing module 400, and an air curtain module 500, as well as the OCT weld depth detection component described in the first aspect embodiment. The optical fiber interface 100 is located on the top surface of the collimating and splitting module 200, the galvanometer module 300 is located on the side of the collimating and splitting module 200, the focusing module 400 and the air curtain module 500 are coaxially arranged below the galvanometer module 300, and the detection optical interface 1 is arranged parallel to the optical fiber interface 100 and located on the side of the optical fiber interface 100 away from the galvanometer module 300.

[0028] The laser oscillating welding equipment proposed in this embodiment has a laser beam that enters from the collimating and splitting module 200, is reflected into the galvanometer module 300, and then coaxially passes through the focusing module 400 and the air curtain module 500 before finally reaching the workpiece surface. The OCT penetration depth detection light source enters from the OCT penetration depth detection component, is reflected into the collimating and splitting module 200, and is transmitted to the right along the same optical path as the laser to the galvanometer module 300. Finally, they coaxially pass down together through the focusing module 400 and the air curtain module 500 before reaching the workpiece surface. During the welding process, the OCT penetration depth detection light and the laser move synchronously at all times, which can provide real-time feedback on the depth of the weld pool during the welding process.

[0029] In some embodiments, the galvanometer module 300 includes an outer housing 301, an inner housing 302, a motor mount 303, a motor 304, a drive board 305, an X-mirror 306, and a Y-mirror 307. The outer housing 301 has an entrance hole and an exit hole. The entrance hole is coaxially connected to the collimating and beam splitting module 200, and the exit hole is coaxially connected to the focusing module 400. The inner housing 302 has its bottom surface mounted on it. Two motor mounts 303 are respectively mounted on the top and rear ends of the inner housing 302. Two motors 304 are respectively clamped and fixed on the two motor mounts 303. The drive board 305 is located at the top of the inner housing 302 and is connected to the two motors 304 by cables. The X-mirror 306 and the Y-mirror 307 are respectively fixed to the ends of the two motors 304 and are both located inside the inner housing 302.

[0030] In this embodiment, the laser beam and the detection beam are transmitted from the collimation and beam splitting module 200 to the galvanometer module 300, pass through the entrance aperture into the inner housing 302 of the galvanometer, and are reflected by the Y-mirror 307 and X-mirror 306 before being transmitted downwards and passing through the exit aperture. During the oscillating welding process, the motor 304 can drive the X-mirror 306 and Y-mirror 307 to deflect, controlling the movement of the laser beam and the detection beam in the X and Y planes to achieve various oscillating welding patterns (such as circles, infinity symbols, sine waves, etc.). The galvanometer has a fast oscillation speed, large amplitude, and high frequency, which can realize the stirring function of the weld pool. The galvanometer module 300 has an inner and outer double-layer housing structure, which not only has strong sealing performance and can effectively protect the motor 304 and its drive board 305 to prevent interference, but also provides double protection for the dust-free nature of the galvanometer lenses and optical path structure, preventing contamination of the lenses and thus reducing welding quality.

[0031] In some embodiments, the two motor mounts 303 are positioned at a 15° angle to each other. Because the motor mounts 303 are positioned at a 15° angle to each other, the X-mirror 306 and the Y-mirror 307 are also positioned at a 15° angle to each other. This special angular arrangement increases the deflection angle of the X-mirror 306 and the Y-mirror 307. Combined with the large-aperture focusing module 400 and the air curtain module 500, this effectively increases the effective range of the laser beam and the detection beam (15mm*15mm), enabling large-format oscillating welding operations.

[0032] In some embodiments, the collimation and beam splitting module 200 includes a collimation protection mirror drawer module 201, a collimation water-cooling module 202, a collimation module 203, and a beam splitting module 204, which are coaxial with the fiber optic interface 100 and arranged sequentially from top to bottom. The collimation module 203 is used to convert the diverging laser beam into a parallel laser beam and transmit it downward to the beam splitting module 204. The beam splitting module 204 is connected to the OCT melt depth detection component and the galvanometer module 300, respectively. The beam splitting module 204 is used to reflect the parallel laser beam to the right into the galvanometer module 300.

[0033] In this embodiment, before welding, the output fiber of the laser needs to be inserted into and fixed in the fiber optic interface 100. The laser outputs a laser beam, which is transmitted downward from the fiber optic interface 100, passes through the collimation protection mirror drawer module 201, and reaches the collimation module 203. The collimation module 203 converts the divergent laser beam into a parallel laser beam, which is then transmitted downward to the beam splitter module 204. The beam splitter module 204 reflects the parallel laser beam to the right into the galvanometer module 300. The left side of the beam splitter module 204 receives the detection beam from the OCT weld depth detection component. The detection beam passes through the beam splitter module 204 and is transmitted to the right along the same optical path as the laser beam into the galvanometer module 300.

[0034] In some embodiments, the focusing module 400 includes a base 401, a focusing lens protective lens drawer module 402, a focusing water-cooling module 403, and water pipe connectors 404; the base 401 and the focusing lens protective lens drawer module 402 are coaxially connected vertically; the focusing water-cooling module 403 is arranged on one side of the base 401; and two water pipe connectors 404 are disposed on the focusing water-cooling module 403.

[0035] In this embodiment, the laser beam and detection beam output by the galvanometer module 300 are focused by the focusing module 400 to form a small spot, and then continue to be transmitted downwards, passing through the air curtain before acting on the workpiece. During the welding process, the focusing module 400 generates high heat. The water pipe joints 404 of the focusing water cooling module 403 are connected to the inlet and outlet water respectively, forming a water circulation that evenly removes the heat generated by the focusing module 400. The focusing lens protection drawer module 402 serves as the final protection for the entire welding equipment. The workpiece is located below it, and it protects the focusing lens from damage caused by spatter, slag, fumes, dust, and other contaminants generated during welding. When the focusing lens protection lens becomes dirty, the drawer can be pulled out for quick cleaning and replacement.

[0036] In some embodiments, the air curtain module 500 includes an annular air blowing module 501, a side blowing module 502, and an air pipe connector 503. The annular air blowing module 501 and the side blowing module 502 are coaxially connected vertically. There are three air pipe connectors 503, two of which are symmetrically arranged on both sides of the annular air blowing module 501, and the other air pipe connector 503 is arranged on one side of the side blowing module 502.

[0037] In this embodiment, the laser beam and the detection beam are focused by the focusing module 400, pass through the air curtain module 500, and are transmitted downwards, ultimately acting on the workpiece surface. The annular air blowing module 501 receives protective gas through air pipe connectors 503 on both sides. The protective gas forms a downward-facing annular protective air wall within the annular air blowing module 501, preventing spatter, slag, fumes, and dust generated during welding from rising and contaminating the focusing module 400. The side blowing module 502 receives protective gas through an air pipe connector 503 on one side, forming a horizontal, unidirectional protective air wall that blows away spatter, slag, fumes, and dust generated during welding to one side. The dual protective air walls of the air curtain module 500 effectively protect the focusing module 400 and reduce interference from spatter, slag, fumes, and dust generated during welding on the detection beam.

[0038] The OCT penetration depth detection component and laser oscillating welding equipment proposed in this utility model have the following advantages: 1. Improved efficiency of oscillating welding: This equipment utilizes X / Y galvanometers 307 arranged at a 15° angle to each other, enabling a large oscillating welding range of 15*15mm. This reduces the complexity of the movement trajectory of external equipment. Combined with an OCT weld depth detection component, the depth of the weld pool can be fed back in real time during the welding process, allowing for adjustments to the welding equipment parameters and improving the quality of oscillating welding. The equipment as a whole, through its simple movement trajectory and large working area, can cover most weld seams and complete oscillating welding of complex shapes without stopping the machine to inspect the welded workpiece, greatly improving the efficiency of oscillating welding. 2. Improved accuracy of oscillating welding: This equipment is equipped with an OCT weld depth detection component. Based on the principle of low coherence interference, it emits a detection beam, which is coaxially coupled with the laser beam and illuminates the workpiece together. By measuring the difference between the optical path of the returned detection beam and the reference optical path, the depth information of the weld pool can be accurately calculated. During the oscillating welding process, the motor 304 can drive the X-mirror 306 and Y-mirror 307 to deflect, controlling the movement of the laser beam and the detection beam in the X / Y plane, realizing various oscillating welding patterns (such as circles, infinity symbols, sine waves, etc.). The oscillation speed of the mirrors is fast, the amplitude is large, and the frequency is high, which can realize the stirring function of the weld pool. 3. Improved applicability of oscillating welding: The equipment is equipped with a focusing module 400 and a focusing lens protection drawer module to protect the focusing lens from damage caused by spatter, slag, fumes, and dust generated during welding. When the focusing lens protection lens becomes dirty, the drawer can be pulled out for quick cleaning and replacement. It is also equipped with an air curtain module 500, which provides dual protection with an annular protective air wall and a side-blowing protective air wall. This effectively protects the focusing module 400 and reduces interference from spatter, slag, fumes, and dust generated during welding on the detection beam. The two modules work together to adapt to oscillating welding operations in various harsh environments.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An OCT penetration depth detection component, characterized in that, Installed on an oscillating welding equipment, the oscillating welding equipment includes an optical fiber interface, a collimating and splitting module, a galvanometer module, a focusing module, and an air curtain module. After the laser beam enters the collimating and splitting module from the optical fiber interface, it is reflected into the galvanometer module, and then coaxially passes through the focusing module and the air curtain module before finally reaching the surface of the workpiece. The OCT penetration depth detection component includes, from top to bottom along the vertical direction, a detection optical interface, an OCT collimation module, an OCT galvanometer module, and an OCT beam splitter module, wherein: The detection optical interface is used to input the detection beam and transmit it downwards coaxially; The OCT collimation module is used to transform the detection beam from a divergent state to a parallel state and transmit it to the OCT galvanometer module. The OCT galvanometer module is used to adjust the parallel detection beam and then transmit it to the OCT beam splitter module; The OCT beam splitting module is used to reflect the adjusted detection beam to the right to the collimating beam splitting module, and the detection beam and the laser beam are transmitted to the right to the inside of the galvanometer module along the same optical path.

2. The OCT penetration depth detection component as described in claim 1, characterized in that, It also includes a camera interface module, which is detachably mounted on the side of the OCT beam splitter module. The oscillating welding equipment also includes a camera, which is mounted on the camera interface module.

3. The OCT penetration depth detection component as described in claim 1, characterized in that, The OCT beam splitting module and the collimating beam splitting module use mirrors of different wavelengths.

4. The OCT penetration depth detection component as described in claim 1, characterized in that, The detection beam used in the OCT penetration depth detection component has a different wavelength than that of the laser beam.

5. A laser oscillating welding device, characterized in that, The device includes an optical fiber interface, a collimation and splitting module, a galvanometer module, a focusing module, and an air curtain module, as well as an OCT fusion depth detection component as described in any one of claims 1-4. The optical fiber interface is located on the top surface of the collimation and splitting module, the galvanometer module is located on the side of the collimation and splitting module, the focusing module and the air curtain module are coaxially arranged below the galvanometer module, and the detection optical interface is arranged parallel to the optical fiber interface and located on the side of the optical fiber interface away from the galvanometer module.

6. The laser oscillating welding equipment as described in claim 5, characterized in that, The galvanometer module includes an outer housing, an inner housing, motor mounts, motors, a drive board, an X-ray galvanometer, and a Y-ray galvanometer. The outer housing has an entrance aperture and an exit aperture. The entrance aperture is coaxially connected to the collimating and beam-splitting module, and the exit aperture is coaxially connected to the focusing module. The bottom surface of the inner housing is mounted on the inner housing. Two motor mounts are respectively mounted on the top and rear ends of the inner housing. The two motors are respectively clamped and fixed on the two motor mounts. The drive board is located at the top of the inner housing and is connected to the cables of the two motors. The X-ray galvanometer and the Y-ray galvanometer are respectively fixed to the ends of the two motors and are both located inside the inner housing.

7. The laser oscillating welding equipment as described in claim 6, characterized in that, The two motor mounts are positioned at a 15° angle to each other.

8. The laser oscillating welding equipment as described in claim 5, characterized in that, The collimation and beam splitting module includes a collimation protection mirror drawer module, a collimation water-cooling module, a collimation module, and a beam splitting module arranged coaxially with the fiber optic interface from top to bottom. The collimation module is used to convert the diverging laser beam into a parallel laser beam and transmit it downward to the beam splitting module. The beam splitting module is connected to the OCT melt depth detection component and the galvanometer module, respectively. The beam splitting module is used to reflect the parallel laser beam to the right into the galvanometer module.

9. The laser oscillating welding equipment as described in claim 5, characterized in that, The focusing module includes a base, a focusing lens protective lens drawer module, a focusing water-cooling module, and water pipe connectors; the base and the focusing lens protective lens drawer module are coaxially connected vertically; the focusing water-cooling module is arranged on one side of the base; and two water pipe connectors are provided on the focusing water-cooling module.

10. The laser oscillating welding equipment as described in claim 5, characterized in that, The air curtain module includes an annular air blowing module, a side blowing module, and an air pipe connector. The annular air blowing module and the side blowing module are coaxially connected vertically. There are three air pipe connectors, two of which are symmetrically arranged on both sides of the annular air blowing module, and the other air pipe connector is arranged on one side of the side blowing module.

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