Temperature control laser welding equipment

Abstract

The invention relates to a temperature control laser welding device which comprises a carrier plate conveying track. The marble gantry XYZ modules stretch across the carrier plate conveying track; the laser welding head and the temperature sensing device are integrated into an integral part and installed at the moving end of the marble gantry XYZ module, and the detection direction of the temperature sensing device and the laser emitting direction of the laser welding head are arranged in the same direction; the CCD positioning module and the coaxial image monitoring module are both mounted on the marble gantry XYZ module; the laser is connected with the laser welding head through an optical fiber; and the temperature control system is electrically connected with the temperature sensing device and the laser. The temperature sensing device and the laser welding head are integrated on a mechanical structure, the temperature sensing device, the marble gantry XYZ module, the temperature control system and the like form a complete physical device, and real-time in-situ monitoring and power dynamic adjustment of the temperature of a welding point are achieved.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a temperature-controlled laser welding device. Background Technology

[0002] Laser soldering, as a non-contact precision welding technology, has been widely used in the soldering of electronic components. Traditional laser soldering typically uses fixed power or simple timing power control to heat the solder joint. This method has extremely stringent requirements for the relative positional consistency between the product and the laser focus. In actual mass production, factors such as incoming material tolerances, fixture wear, and thermal deformation can easily cause the product to defocus, leading to changes in heating energy density, resulting in poor soldering, unstable yield, and difficulty in achieving efficient and reliable unmanned mass production.

[0003] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create a temperature-controlled laser welding device that has greater industrial application value. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this invention is to provide a temperature-controlled laser welding device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A temperature-controlled laser welding device, comprising:

[0007] Carrier plate conveyor track;

[0008] At least one marble gantry XYZ module, which spans the carrier plate conveyor track;

[0009] The laser welding head and the temperature sensing device are integrated into one unit and installed on the moving end of the marble gantry XYZ module. The detection direction of the temperature sensing device is set in the same direction as the laser emission direction of the laser welding head.

[0010] Both the CCD positioning module and the coaxial image monitoring module are installed on the marble gantry XYZ module;

[0011] The laser is connected to the laser welding head via optical fiber;

[0012] The temperature control system is electrically connected to the temperature sensor and the laser, respectively.

[0013] As a further improvement of the present invention, the marble gantry XYZ module includes a fixed X-axis module, a Y-axis module slidably disposed on the X-axis module, and a Z-axis module slidably disposed on the Y-axis module. The integrated components of the laser welding head and the temperature sensing device, as well as the CCD positioning module, are all mounted on the Z-axis module.

[0014] As a further improvement of the present invention, a dust collection module is also included, wherein the smoke nozzle of the dust collection module is disposed adjacent to the laser welding head and moves synchronously with it.

[0015] As a further improvement of the present invention, a stop mechanism for positioning the carrier plate is provided on the carrier plate conveying track.

[0016] As a further improvement of the present invention, it also includes a barcode scanner for reading information about products entering the device and installed on the marble gantry XYZ module.

[0017] As a further improvement of the invention, a water cooling system for cooling the laser is also included.

[0018] As a further improvement of the present invention, the temperature sensing device is an infrared temperature sensor.

[0019] By means of the above-described solution, the present invention has at least the following advantages:

[0020] This invention integrates a temperature sensing device with a laser welding head in a mechanical structure, and forms a complete physical device with a marble gantry XYZ module, a temperature control system, etc., thereby realizing real-time in-situ monitoring of the welding point temperature and dynamic power adjustment.

[0021] The structural design of this invention makes the welding process insensitive to minor changes in the position of the workpiece and can effectively compensate for the energy changes caused by defocusing. This ensures the stability and repeatability of the welding process at the hardware level and provides a reliable foundation for automated mass production.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the following are preferred embodiments of the present invention described in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a temperature-controlled laser welding device according to the present invention;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of the laser welding assembly;

[0026] Figure 3 yes Figure 1Structural schematic diagram of the XYZ module of the marble gantry;

[0027] Figure 4 yes Figure 1 A schematic diagram of the structure of the medium-load plate conveyor track.

[0028] The meanings of the labels in the figures are as follows.

[0029] 1. Carrier plate conveying track; 2. CCD positioning module; 3. Coaxial image monitoring module; 4. Dust collection module; 5. Laser welding head; 6. Temperature sensing device; 7. Marble gantry XYZ module; 8. Temperature control system; 9. Water cooling system; 10. Laser; 11. Barcode scanner.

[0030] Stopping mechanism 101;

[0031] X-axis module 701, Y-axis module 702, Z-axis module 703. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] First embodiment of the present invention:

[0035] like Figures 1-4 As shown, a temperature-controlled laser welding device according to this embodiment includes a carrier plate conveying track 1 for conveying products.

[0036] The core of the equipment is a marble gantry XYZ module 7 that spans the conveyor rail 1 across the plate. This module provides a high-precision three-dimensional motion platform.

[0037] At the moving end of the marble gantry XYZ module 7, an integrated component consisting of a laser welding head 5 and a temperature sensing device 6 is installed. The temperature sensing device 6 is preferably an infrared temperature sensor, and its detection direction is set in the same direction as the laser emission direction of the laser welding head 5, so as to realize in-situ real-time temperature monitoring of the laser action point.

[0038] Also installed on the marble gantry XYZ module 7 are a CCD positioning module 2 for precise positioning and a coaxial image monitoring module 3 for process observation.

[0039] The equipment also includes a laser 10 that supplies laser energy to the laser welding head 5 via an optical fiber, and a temperature control system 8 that is electrically connected to the temperature sensing device 6 and the laser 10 respectively. The temperature control system 8 can adjust the output power of the laser 10 in real time according to the temperature signal fed back by the temperature sensing device 6, thereby forming a closed-loop temperature control circuit.

[0040] In addition, the marble gantry XYZ module 7 specifically includes a fixed X-axis module 701, a Y-axis module 702 slidably disposed on the X-axis module 701, and a Z-axis module 703 slidably disposed on the Y-axis module 702. The aforementioned laser welding head 5 and temperature sensing device 6 integrated component and CCD positioning module 2 are all installed on the Z-axis module 703 to achieve synchronous movement.

[0041] The equipment also includes a dust collection module 4, whose smoke nozzle 8 is positioned adjacent to the laser welding head 5 and moves synchronously thereto to effectively collect welding fumes.

[0042] The carrier plate conveying track 1 is equipped with a stop mechanism 101 that can accurately position the carrier plate.

[0043] Meanwhile, the equipment is also equipped with a barcode scanner 11 installed on the marble gantry XYZ module 7 for reading information of products entering the equipment, and a water cooling system 9 for cooling the laser 10 to ensure the stability of the laser 10's operation.

[0044] This embodiment combines automated transfer fixtures, CCD target positioning, and real-time infrared temperature sensing to adjust laser power. By monitoring the solder paste temperature in real time with infrared temperature sensing and adjusting the laser power accordingly, the solder paste is heated along a fixed heating curve to reach its melting point, resulting in a more stable method. This enables mass production of solder paste welding without human intervention, achieving high yield, high efficiency, and stable reliability.

[0045] The second embodiment of the present invention:

[0046] like Figures 1-4As shown, a temperature-controlled laser welding device in this embodiment includes a carrier plate conveying track 1, a CCD positioning module 2, a coaxial image monitoring module 3, a dust collection module 4, a laser welding head 5, a temperature sensing device 6, a marble gantry XYZ module 7, a temperature control system 8, a water cooling system 9, a laser 10, and a barcode scanner 11, etc.

[0047] Carrier plate conveyor track 1 can transport product carrier plates in and out of the equipment and achieve positioning inside the equipment.

[0048] CCD positioning module 2 can grasp incoming products and thus accurately locate the position of solder paste pads.

[0049] The coaxial image monitoring module 3 can monitor the real-time status of solder paste during the soldering process.

[0050] Dust collection module 4 is used to collect smoke and dust to prevent smoke and dust from blocking the laser;

[0051] Laser welding head 5 can control the laser beam to be focused on the product.

[0052] The temperature sensing device 6 can monitor the real-time temperature of the solder paste by emitting infrared light.

[0053] The XYZ module 7 of the marble gantry can drive the CCD positioning module, dust collection module, laser welding head, temperature sensing device and other components to adjust their positions, so as to realize automated target grabbing, positioning and laser alignment.

[0054] Temperature control system 8 can adjust the laser output power parameters based on temperature acquisition information.

[0055] The water cooling system 9 can achieve constant temperature control of the laser through water circulation.

[0056] Laser 10 can emit a high-energy laser beam through an optical fiber.

[0057] The barcode scanner 11 can scan incoming materials to read product information and realize information communication with the MES system.

[0058] The specific steps for operating the device in this embodiment are as follows:

[0059] Step 1: The product to be welded is transferred along the carrier plate conveyor track 1 into this equipment, and the blocking mechanism 101 stops the carrier plate in a fixed position.

[0060] Step 2: The X-axis module 701 and Y-axis module 702 on the marble gantry XYZ module 7 move, and the Z-axis module 703 moves. The barcode scanner 11 is aligned with the incoming material QR code and scans the code to read the incoming material information.

[0061] Step 3: The X-axis module 701 and Y-axis module 702 on the marble gantry XYZ module 7 move, and the Z-axis module 703 moves. The CCD positioning module 2 aligns with the product reference target and calculates the precise position of the product target by image acquisition.

[0062] Step 4: The welding point is calculated, the X-axis module 701 and Y-axis module 702 on the marble gantry XYZ module 7 move, the Z-axis module 703 moves, the laser welding head 5 is aligned with the solder paste, and according to the set heating process parameters, the infrared temperature sensor, the laser power adjustment system and the laser work together to form a closed loop control, strictly control the heating process of the solder paste, and complete the soldering.

[0063] Step 5: Repeat N times according to the number of welding points on the product, where N = the number of welding points.

[0064] Step 6: The finished product is transferred along the carrier plate conveyor track 1 to the output device.

[0065] Compared to traditional laser welding, it is more flexible, has a wider range of applications, and is more versatile, requiring no hardware changes when switching products. It also boasts higher yield rates and a lower probability of defects caused by material defocusing upon arrival.

[0066] This invention integrates a temperature sensing device with the laser welding head in a mechanical structure, and combines it with a marble gantry XYZ module and a temperature control system to form a complete physical device. This enables real-time, in-situ monitoring of the welding point temperature and dynamic power adjustment. This makes the welding process insensitive to minute changes in the workpiece's position, effectively compensating for energy changes caused by defocusing. Therefore, at the hardware level, it ensures the stability and repeatability of the welding process, providing a reliable foundation for automated mass production.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0068] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A temperature-controlled laser welding equipment, characterized in that, include: Carrier plate conveying track (1); At least one marble gantry XYZ module (7) is arranged across the carrier plate conveying track (1); The laser welding head (5) and the temperature sensing device (6) are integrated into one component and installed on the moving end of the marble gantry XYZ module (7). The detection direction of the temperature sensing device (6) is set in the same direction as the laser emission direction of the laser welding head (5). The CCD positioning module (2) and the coaxial image monitoring module (3) are both installed on the marble gantry XYZ module (7); The laser (10) is connected to the laser welding head (5) via an optical fiber; The temperature control system (8) is electrically connected to the temperature sensing device (6) and the laser (10), respectively.

2. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, The marble gantry XYZ module (7) includes a fixed X-axis module (701), a Y-axis module (702) slidably disposed on the X-axis module (701), and a Z-axis module (703) slidably disposed on the Y-axis module (702). The integrated components of the laser welding head (5) and the temperature sensing device (6) as well as the CCD positioning module (2) are all mounted on the Z-axis module (703).

3. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, It also includes a dust collection module (4), the smoke nozzle of which is located adjacent to the laser welding head (5) and moves synchronously with it.

4. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, The carrier plate conveying track (1) is equipped with a stop mechanism (101) for positioning the carrier plate.

5. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, It also includes a barcode scanner (11) installed on the marble gantry XYZ module (7) for reading information about products entering the equipment.

6. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, It also includes a water cooling system (9) for cooling the laser (10).

7. The temperature-controlled laser welding equipment as described in claim 1, characterized in that, The temperature sensing device (6) is an infrared temperature sensor.

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