Multi-cavity optical fiber coupling laser welding system

Abstract

The invention discloses a multi-cavity optical fiber coupling laser welding system which comprises a main shell, a direct current power supply interface, a communication module and a multi-cavity module. An accommodating space is formed in the main shell; the direct-current power supply interface is positioned on one side of the main shell; the communication module is arranged in the accommodating space; the multi-cavity module is formed by connecting a plurality of laser emitters in parallel and is in communication connection with the communication module; the laser transmitter comprises a transmitter body; a placing cavity and an emitting opening are formed in the emitter body; the emission port penetrates out of the main shell; the semiconductor device is arranged in the placing cavity; one end of the optical fiber is communicated with the semiconductor device, and the other end extends upwards to one side of the emission port; the optical fiber comprises an optical fiber wrapping layer, a homogenizing layer and a quartz layer which are sequentially wrapped from outside to inside. And the optical lens is positioned below the emission port. Parallel control is performed on the plurality of laser generators through the communication module, the control precision is high, and the communication efficiency is good; a plurality of laser generators can be integrated together and are subjected to communication control by the communication module, and the occupied area is small.

Description

Technical Field

[0001] The invention relates to a laser welding system, in particular to a multi-cavity optical fiber coupling laser welding system. Background Art

[0002] Laser welding technology has become an important technology in the field of welding due to its advantages of precision, small heat-affected zone and high efficiency. Existing laser welding technology usually couples other optical components in the form of optical fiber output. This form of coupling usually controls a large number of laser emitters with a single drive. This type of drive has poor control accuracy, low communication efficiency and high failure rate. Secondly, in order to ensure the stability of laser emission, the length of the optical fiber is relatively long, which makes the volume of the entire laser generator larger. When multiple laser generators are integrated together, the entire module occupies a larger volume and cannot meet the existing assembly requirements. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-cavity fiber-coupled laser welding system, which manages multiple laser generators in parallel through a communication module, has high communication efficiency, occupies a small area, and is adaptable to a wide range of scenarios.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a multi-cavity fiber-coupled laser welding system, comprising:

[0005] A main housing, wherein the main housing has a containing space;

[0006] A DC power supply interface, located on one side of the main housing, for supplying power;

[0007] A communication module is arranged in the accommodating space;

[0008] A multi-cavity module is formed by a plurality of laser emitters connected in parallel, and the communication module is used to control the plurality of laser emitters; wherein the laser emitter comprises an emitter body, a semiconductor device, an optical fiber and an optical lens; the emitter body has a placement cavity, and one end of the emitter body is provided with an emission port; the emission port passes through the main shell; the semiconductor device is arranged in the placement cavity to emit the laser from outside the main shell; one end of the optical fiber is connected to the light outlet of the semiconductor device, and the other end extends upward to one side of the emission port, and a light guide port is also provided between the optical fiber and the emission port; the optical fiber comprises an optical fiber cladding, a homogenizing layer and a quartz layer sequentially coated from the outside to the inside; the optical lens is located below the emission port.

[0009] Furthermore, the semiconductor device is also connected to two pins extending from the transmitter body.

[0010] Furthermore, the optical lens is aspherical.

[0011] Furthermore, a target aperture is also provided at the emission port.

[0012] Furthermore, the material of the homogenization layer is composed of aluminum oxide and silicon.

[0013] Furthermore, a water cooling module is provided on the outer surface of the multi-cavity module, and the water cooling module is supplied with cooling liquid through a cooling liquid supply port located on one side of the main shell.

[0014] Furthermore, two installation guides are provided at the bottom of the main shell.

[0015] Furthermore, a communication interface is provided outside the main shell.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The multi-cavity fiber-coupled laser welding system of the present invention can control multiple laser generators in the multi-cavity module in parallel through a communication module, with high control accuracy and good communication efficiency; secondly, the optical fiber is composed of an optical fiber cladding, a homogenizing layer and a quartz layer, and the homogenizing layer can improve the uniformity of the light beam emitted by the optical fiber, so that the length of the optical fiber can be shortened, the laser generator can be miniaturized, and then the multiple laser generators can be integrated together for communication control by the communication module, which occupies a small area and meets actual use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 a cross-sectional view of the interior of

[0021] Figure 3 A schematic diagram of the three-dimensional structure of a laser transmitter in one embodiment of the present invention;

[0022] Figure 4 for Figure 3 Internal cross-section of

[0023] Figure 5 This is an enlarged view of part A in 4;

[0024] Figure 6 is a cross-sectional view of an optical fiber in one embodiment of the present invention;

[0025] Among them: 1. Main shell; 2. DC power supply interface; 3. Communication module; 4. Multi-cavity module; 5. Water cooling module; 6. Communication interface; 7. Installation guide; 20. Optical fiber cladding; 21. Homogenization layer; 22. Quartz layer; 40. Laser transmitter; 50. Cooling liquid supply port; 401. Transmitter body; 402. Semiconductor device; 403. Optical fiber; 404. Optical lens; 405. Pin; 406. Target aperture; 407. Transmitting port; 408. Light guide port. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] The present invention provides a multi-cavity fiber-coupled laser welding system to solve the problems in the prior art that a large number of laser emitters are usually controlled by a single drive, the drive form has poor control accuracy, low communication efficiency, high failure rate, and large occupied area.

[0028] For ease of understanding, the specific process in the embodiments of the present application is described below. Figures 1 to 6 A multi-cavity fiber-coupled laser welding system in an embodiment of the present application includes a main shell 1, a DC power supply interface 2, a communication module 3 and a multi-cavity module 4; the main shell 1 has a accommodating space; the DC power supply interface 2 is located on one side of the main shell 1, for supplying power to the laser welding system; the communication module 3 is arranged in the accommodating space.

[0029] The multi-cavity module 4 is composed of a plurality of laser emitters 40 arranged in parallel, and the communication module 3 is used to control the plurality of laser emitters 40. The communication module can control the plurality of laser emitters 40 in real time, and can control the light emission time, energy and other parameters of a certain laser emitter 40 individually.

[0030] Specifically, the laser transmitter 40 includes a transmitter body 401, a semiconductor device 402, an optical fiber 403 and an optical lens 404; the transmitter body 401 has a placement cavity, and one end of the transmitter body 401 is provided with a launch port 407; the launch port 407 passes through the main shell 1; the semiconductor device 402 is arranged in the placement cavity, and is used to emit laser from the outside of the main shell 1; one end of the optical fiber 403 is connected to the light outlet of the semiconductor device 402, and the other end extends upward to one side of the launch port 407, and a light guide port 408 is also provided between the optical fiber 403 and the launch port 40; the optical fiber 403 includes a fiber cladding 20, a homogenization layer 21 and a quartz layer 22 sequentially coated from the outside to the inside; the optical lens 404 is located below the launch port 407.

[0031] The multi-cavity fiber-coupled laser welding system of the present invention can control multiple laser generators in parallel through a communication module, with high control accuracy and good communication efficiency; secondly, the optical fiber in the present invention is composed of an optical fiber cladding 20, a homogenizing layer 21 and a quartz layer 22, and the homogenizing layer 21 can improve the uniformity of the light beam emitted by the optical fiber, so that the length of the optical fiber can be shortened, the laser generator 40 can be miniaturized, and then the multiple laser generators can be integrated together and controlled by the communication module for communication, which occupies a small area and meets the actual use requirements.

[0032] In one embodiment, see Figure 3 The semiconductor device 402 is also connected to two pins 405 extending from the transmitter body 401, and can be connected to the outside through the two pins 405, which is convenient for practical application.

[0033] In one embodiment, see Figure 4 and Figure 5 The optical lens 404 is of a non-spherical shape, and the optical output characteristics can be further coupled and optimized through the non-spherical optical lens 404.

[0034] In one embodiment, see Figure 5 A target aperture 406 is also provided at the emission port 407, and the target aperture 406 can effectively constrain the output size of the light spot.

[0035] In one embodiment, the homogenization layer 21 is composed of aluminum oxide and silicon. When light passes through, it will be randomly scattered by these particles multiple times, thereby forming a uniformly distributed light field. The homogenization layer 21 is coated between the optical fiber cladding 20 and the quartz layer 22, so that there is a certain refractive index difference between the optical fiber cladding 20 and the quartz layer 22. This difference causes light of different modes to interfere with each other and mix when passing through the homogenization optical fiber, further enhancing the uniformity of the light field and improving the uniformity of the emitted light.

[0036] In one embodiment, a water cooling module 5 is further provided on the outer surface of the multi-cavity module 4, and the water cooling module 5 is supplied with coolant through a coolant supply port 50 located on one side of the main housing 1. Since the laser generator 40 in the multi-cavity module 4 generates a large amount of heat during operation and is prone to malfunction after heating, a water cooling module 5 is further provided outside the laser generator 40 for rapid cooling, thereby ensuring safe and stable operation of the laser generator 40.

[0037] In one embodiment, two installation guide members 7 are further provided at the bottom of the main housing 1 , and the laser welding system can be quickly and effectively guided and installed through the two installation guide members 7 .

[0038] In one embodiment, a communication interface 6 is further provided outside the main housing 1 for performing relevant communications with the outside.

[0039] The multi-cavity fiber-coupled laser welding system of the present invention is based on the bus communication principle, and the multi-cavity modules are managed in parallel through the communication module. The subsystems are coordinated and controlled by the parent system according to the IP address. The light-emitting time and energy and other parameters of a certain laser generator can be controlled individually. The control accuracy is high, the anti-interference characteristics are relatively stable, and the actual use requirements are met.

[0040] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-cavity fiber-coupled laser welding system, characterized in that: include: A main housing (1), wherein the main housing (1) has a containing space; A DC power supply interface (2), located on one side of the main housing (1), for supplying power; A communication module (3) is arranged in the accommodating space; A multi-cavity module (4) is formed by a plurality of laser emitters (40) arranged in parallel, wherein the communication module (3) is used to control the plurality of laser emitters (40); wherein the laser emitter (40) comprises an emitter body (401), a semiconductor device (402), an optical fiber (403) and an optical lens (404); the emitter body (401) has a placement cavity therein, and one end of the emitter body (401) is provided with an emission port (407); the semiconductor device (402) is arranged in the placement cavity The optical fiber (403) is used to emit laser light from outside the main housing (1); one end of the optical fiber (403) is connected to the semiconductor device (402), and the other end extends upward to one side of the emission port (407); a light guide port (408) is also provided between the optical fiber (403) and the emission port (407); the optical fiber (403) comprises an optical fiber cladding (20), a homogenizing layer (21) and a quartz layer (22) which are coated in sequence from the outside to the inside; and the optical lens (404) is located below the emission port (407).

2. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: The semiconductor device (402) is also connected to two pins (405) extending from the transmitter body (401).

3. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: The optical lens (404) is of a non-spherical shape.

4. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: A target aperture (406) is also provided at the emission port (407).

5. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: The material of the homogenization layer (21) is composed of aluminum oxide and silicon.

6. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: The outer surface of the multi-cavity module (4) is also provided with a water cooling module (5), and the water cooling module (5) is supplied with cooling liquid through a cooling liquid supply port (50) located on one side of the main shell (1).

7. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: Two installation guide members (7) are also provided at the bottom of the main housing (1).

8. The multi-cavity fiber-coupled laser welding system according to claim 1, characterized in that: A communication interface (6) is also provided outside the main housing (1).

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