CN214161763U - Laser welding system - Google Patents
Laser welding system Download PDFInfo
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- CN214161763U CN214161763U CN202120028893.6U CN202120028893U CN214161763U CN 214161763 U CN214161763 U CN 214161763U CN 202120028893 U CN202120028893 U CN 202120028893U CN 214161763 U CN214161763 U CN 214161763U
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Abstract
The utility model provides a laser welding system, laser welding system includes laser instrument, transmission optical fiber, laser light path system, control module and motion module. The laser is used for outputting a continuous or pulse laser beam; the transmission optical fiber is used for transmitting the laser beam to the laser optical path system; the laser optical path system comprises an F-Theta field lens and is used for focusing the laser beam to a workpiece to be welded through the F-Theta field lens; the motion module is used for loading the workpieces to be welded; the control module is used for controlling the laser to output the laser beam and controlling the movement of the motion module. Through the laser welding system of this application, can have the copper mesh inner core and the copper foil shell realization effective connection to the VC soaking pit, to ultra-thin copper mesh and copper foil welding, can satisfy the no fracture of upper copper mesh net, the back of lower floor's copper foil does not have the requirement of solder print to realize extensive automated production.
Description
Technical Field
The application relates to the field of VC soaking plate processing, in particular to a laser welding system for VC soaking plate processing.
Background
The heat dissipation problem of large-scale commercial, light, thin, portable, high-endurance and highly intelligent consumer electronics products of the 5G mobile communication technology is concerned. The VC soaking plate is taken as a main heat dissipation part of the mainstream and is particularly suitable for internal heat dissipation of electronic products with narrow space limitation. The VC soaking plate made of pure copper mainly has a hollow closed flat structure and mainly comprises a copper mesh (the thickness is less than 0.1mm) inner core and a copper foil (the thickness is less than 0.2mm) outer shell. The connection of the copper mesh and the copper foil is used as a primary process for manufacturing the VC soaking plate, and the contact resistance welding is a traditional connection solution, but the resistance welding has the problems of low welding efficiency, large heat affected zone, frequent cleaning or replacement of a welding head, high automation difficulty and the like, and can not adapt to the industrial production demand of intelligent manufacturing gradually.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art not enough, provide a laser welding system that is used for the copper mesh inner core of VC soaking pit and copper foil shell to be connected, laser welding system can realize effectively being connected with the copper foil to the copper mesh in the VC soaking pit preparation process to satisfy upper copper mesh net and do not have the fracture, the copper foil back of lower floor does not have the requirement of welding seal, with the shortcoming of overcoming among the prior art.
The utility model provides a laser welding system, which comprises a laser, a transmission optical fiber, a laser light path system, a control module and a motion module;
the laser is used for outputting a continuous or pulse laser beam;
the transmission optical fiber is used for transmitting the laser beam to the laser optical path system;
the laser optical path system comprises an F-Theta field lens and is used for focusing a laser beam to a workpiece to be welded through the F-Theta field lens;
the motion module is used for loading a workpiece to be welded;
the control module is used for controlling the laser to output the laser beam and controlling the movement of the motion module.
Further, the laser optical path system further comprises a collimating mirror positioned in front of the F-Theta field lens in the optical path direction, wherein the collimating mirror is used for shaping the divergent laser beam from the transmission optical fiber into a parallel laser beam.
Further, the laser light path system also comprises an optical isolator which is positioned in front of the collimating mirror in the light path direction and is used for blocking reflected light when the laser beam acts on a workpiece to be welded.
Further, the laser optical path system also comprises a 45-degree turn-back mirror and a scanning galvanometer which are positioned between the collimating mirror and the F-Theta field lens in the optical path direction, wherein the 45-degree turn-back mirror is used for reflecting laser and transmitting visible light, and the scanning galvanometer is used for deflecting the laser beam passing through the 45-degree turn-back mirror to the F-Theta field lens.
Furthermore, the wavelength range of the laser beam emitted by the laser is 1000-2Less than 2.0.
Furthermore, the core diameter of the transmission optical fiber is 10-30 μm.
Preferably, the core diameter of the transmission fiber is 10 μm or more and less than 20 μm.
Optionally, the device further comprises a coaxial shielding gas device, wherein the coaxial shielding gas device is used for being installed on the F-Theta field lens.
Furthermore, the motion module comprises a servo drive motion shaft, a servo motor, a screw rod and a slide block, wherein the servo motor drives the screw rod to move, and the screw rod drives a workpiece to be welded fixed on the slide block to move.
And further, the device also comprises a vision device, wherein the vision device is connected with the 45-degree turning mirror through threads and is used for automatically positioning the workpiece to be welded and monitoring the surface of the workpiece to be welded by a worker.
Adopt the technical scheme provided by the utility model, compare with the existing conventional art at present, the utility model discloses a laser welding system can realize effectively being connected with the copper foil to the copper mesh in the VC soaking pit preparation process, welds to ultra-thin copper mesh (thickness < 0.1mm) and copper foil (thickness < 0.2mm), can satisfy upper copper mesh net and do not have the fracture, and the lower floor's copper foil back does not have the requirement of welding seal to realize extensive automatic volume production, can satisfy the industrialization volume production demand of intelligent manufacturing at present.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a schematic structural diagram of a laser welding system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a laser optical path system according to an embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a control system according to an embodiment of the present invention;
fig. 4 shows a welding pattern of the present invention.
Description of the symbols: 10-laser, 20-transmission optical fiber, 30-laser optical path system, 40-motion module and 50-control system; 301-an optical isolator, 302-a collimating mirror, 303-a 45-degree turning mirror, 304-a scanning galvanometer, 305-F-Theta field lens, 306-a vision device and 307-a coaxial protective gas device; 501-external control software, 502-industrial personal computer, 503-laser control card and 504-motion control card.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present application, are intended to indicate only specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present application belong. Terms such as those defined in commonly used dictionaries will be interpreted as having a meaning that is the same as a contextual meaning in the related art and will not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein in various embodiments.
As shown in fig. 1, the utility model provides a laser welding system is applied to being connected of the copper net inner core and the copper foil shell of VC soaking plate, and this system comprises laser 10, transmission fiber 20, laser optical path system 30, control system 50 and motion module 40.
The laser emitted by the laser 10 is transmitted to the laser optical path system 30 through the transmission fiber 20, and the laser is shaped and focused by the laser optical path system 30, and finally falls onto the surface of the workpiece to be welded where the moving module 40 is to be located to perform the welding process, wherein all the welding operations are controlled by the control system 50.
Wherein, the schematic diagram of the laser optical path system 30 is shown in fig. 2, the laser optical path system comprises an optical isolator 301, a collimating mirror 302, a 45 ° turning mirror 303, a scanning galvanometer 304 and an F-Theta field lens 305, the above components are connected in sequence as shown in fig. 2, when the laser beam generated by the laser 10 is output to the optical isolator 301 through the transmission fiber 20, the optical isolator 301 can effectively block the reflected light of the laser beam and the material when the laser beam and the material act, the transmission optical fiber 20 and the laser 10 are protected from interference and burning loss, then the laser beam is transmitted to the collimating mirror 302 after passing through the optical isolator, the collimating mirror 302 shapes the divergent laser beam into a parallel laser beam, the shaped parallel laser beam passes through the 45-degree turning mirror 303, and the laser beam enters a scanning galvanometer 304, the scanning galvanometer 304 deflects the laser beam to an F-Theta field lens 305, and finally the F-Theta field lens focuses the laser beam to the surface of a workpiece to be welded for welding. The 45 ° turning mirror 303 is a laser optical device for transmitting visible light, reflecting laser light, or reflecting visible light and transmitting laser light.
Further, the physical principle of the 45 ° turning mirror 303 can be utilized to install the vision device 306 for the laser welding system, so that the worker can monitor the surface of the workpiece to be welded and realize the automatic positioning of the workpiece to be welded.
Further, a coaxial protective gas device 307 can be added to the laser welding system, and the coaxial protective gas device 307 is assembled with the F-Theta field lens 305, so that the surface of the obtained weldment cannot be blackened by oxidation, and the attractiveness of the weldment can be ensured.
Fig. 3 illustrates a schematic diagram of a control system, which is composed of external control software 501, an industrial personal computer 502, a laser control card 503 and a motion control card 504, wherein the external control software is used for drawing a welding pattern, setting welding parameters of the laser 10, issuing the welding parameters to the laser control card 503 and the motion control card 504 through the industrial personal computer 502, and issuing signals to the laser through the laser control card 503; the motion control card 504 issues a motion signal to the motion module 40.
The motion module 40 includes a servo drive motion shaft device, wherein the servo motor drives the lead screw to move, which can drive the workpiece fixed on the slide block to move, and the motion module 40 supports the motion in two-dimensional direction and three-dimensional space.
Example 1
The workpiece to be welded is exemplified by a 0.08mm thick red copper mesh connected to a 0.15mm thick red copper foil.
Since the materials used are very thin and fragile, a 100w infrared nanosecond laser is used in this example, with a beam quality M2Less than 1.6, the diameter of the laser transmission optical fiber core is less than 20 μm, and the laser beam output mode of the laser is set to be a continuous mode.
Since the laser focusing spot of the laser on the workpiece to be welded is small when the laser is used for welding, the welding spot is reduced accordingly, and in order to ensure the welding firmness, a spiral welding pattern is selected, wherein the pattern size is 0.9mm, the number of spiral lines is 10, the welding power is set to 80W, and the welding speed is set to 50mm/s in the embodiment shown in FIG. 4.
And setting the parameters in the laser welding system through the control system, placing the workpiece to be welded on the motion module after the setting is finished, and moving the motion module according to a preset route under the control of the control system to start the laser welding operation.
The laser 10 emits laser with preset laser beam quality, the laser is transmitted into an optical isolator 301 through a laser transmission fiber 20, the laser is emitted into a collimating mirror 302 through the optical isolator, the incident laser is shaped into parallel beams through the collimating mirror, then the parallel laser beams are emitted into a scanning vibrating mirror 304 through a 45-degree turn-back mirror 303, the scanning vibrating mirror 304 deflects the incident laser beams into an F-Theta field mirror, and finally the laser beams are focused onto the surface of a workpiece to be welded through the F-Theta field mirror 305 to form proper focusing spots for welding.
When the motion module carrying the workpiece to be welded comes to a laser output position, laser is in contact with the workpiece to be welded, the motion module moves according to a preset line, and meanwhile, in order to weld a spiral line, a lens of the scanning galvanometer is polarized according to a program preset mode, so that the laser hitting the workpiece to be welded is shaken at a high speed to weld a spiral-pattern welding pattern.
The welding effect is as follows: the copper mesh and the copper foil are firmly connected, the back surface of the lower layer of the copper foil is not penetrated, and a small amount of broken meshes of the copper mesh meet the welding requirement.
Example 2
In this embodiment, the workpiece to be welded is made by connecting a red copper mesh with a thickness of 0.05mm to a red copper foil with a thickness of 0.1 mm.
The copper mesh material was thinner and weaker than the copper mesh material of the present example of example 1, and therefore, a 70W infrared nanosecond laser was used in the present example, and the beam quality M was obtained2Less than 1.4, the diameter of the optical fiber core is less than 20 μm, the laser beam output mode of the laser is set to be a pulse mode, the welding pattern is a spiral line, the pattern size is 1mm, the number of the spiral lines is 4, the welding power is set to be 50W, the welding speed is set to be 160mm/s, and welding is carried out according to a preset position.
The step of emitting laser to the surface of the workpiece to be welded is the same as the above embodiment, and is not described herein again.
The welding effect is as follows: the copper mesh and the copper foil are firmly connected, the back surface of the lower layer of the copper foil is not penetrated, and the mesh of the copper mesh is basically not broken, so that the welding requirement is met.
Further, in the two embodiments, the coaxial shielding gas device 307 is assembled with the F-Theta field lens 305, and is applied to the embodiment 1 and the embodiment 2, so that the welded workpiece surface is not oxidized and blackened, and the aesthetic property of the workpiece is ensured.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part. The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.
Claims (10)
1. A laser welding system is characterized by comprising a laser, a transmission optical fiber, a laser optical path system, a control module and a motion module;
the laser is used for outputting a continuous or pulse laser beam;
the transmission optical fiber is used for transmitting the laser beam to the laser optical path system;
the laser optical path system comprises an F-Theta field lens and is used for focusing the laser beam to a workpiece to be welded through the F-Theta field lens;
the motion module is used for loading the workpieces to be welded;
the control module is used for controlling the laser to output the laser beam and controlling the movement of the motion module.
2. The laser welding system of claim 1, wherein the laser optical path system further comprises a collimating mirror positioned before the F-Theta field lens in the optical path direction, the collimating mirror configured to shape the diverging laser beam from the delivery fiber into a parallel laser beam.
3. The laser welding system of claim 2 wherein the laser beam path system further includes an optical isolator positioned in the beam path direction before the collimator mirror, the optical isolator for blocking reflected light of the laser beam as it interacts with the workpiece to be welded.
4. The laser welding system of claim 3, wherein the laser optical path system further comprises a 45 ° turn-back mirror and a scanning galvanometer mirror positioned between the collimating mirror and the F-Theta field mirror in the optical path direction, the 45 ° turn-back mirror being configured to reflect laser light and transmit visible light, the scanning galvanometer mirror being configured to deflect a laser beam passing through the 45 ° turn-back mirror to the F-Theta field mirror.
5. The laser welding system of claim 4, further comprising a vision device, wherein the vision device and the 45 ° fold mirror are threadably connected.
6. The laser welding system of claim 1, wherein the core diameter of the delivery fiber is 10-30 μ ι η.
7. The laser welding system according to claim 6, wherein the core diameter of the transmission fiber is 10 μm or more and less than 20 μm.
8. The laser welding system of claim 1, further comprising a coaxial shielding gas device for mounting on the F-Theta field lens.
9. The laser welding system of claim 1, wherein the motion module comprises a servo drive motion shaft, a servo motor, a lead screw and a slide block, the servo motor drives the lead screw to move, and the lead screw drives the workpiece to be welded fixed on the slide block to move.
10. The laser welding system as recited in claim 1, wherein the laser beam emitted from the laser has a wavelength in the range of 1000-1100nm, and the laser beam has a beam mass M2Less than 2.0.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120028893.6U CN214161763U (en) | 2021-01-05 | 2021-01-05 | Laser welding system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120028893.6U CN214161763U (en) | 2021-01-05 | 2021-01-05 | Laser welding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346429A (en) * | 2021-12-27 | 2022-04-15 | 深圳泰德激光技术股份有限公司 | Laser welding method for thin materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346429A (en) * | 2021-12-27 | 2022-04-15 | 深圳泰德激光技术股份有限公司 | Laser welding method for thin materials |
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