Top and bottom distributed laser welding machine

Abstract

This invention provides a top-and-bottom distributed laser welding machine, including a fixture and a welding device. The fixture includes a positioning seat, a first driver, and a second driver. The top of the positioning seat has a positioning groove, and the bottom of the positioning seat has a clearance hole communicating with the bottom of the positioning groove. The first driver is driven by a push rod, the end of which extends into the clearance hole. The first driver is used to drive the push rod away from or towards the bottom of the positioning groove. The second driver is driven by a pressure plate, which is driven by the second driver to move the pressure plate towards or away from the opening of the positioning groove. At least the area of ​​the pressure plate relative to the positioning groove is made of transparent material. The welding device includes a laser galvanometer disposed above the fixture. The laser galvanometer can emit a laser beam in a vertical direction to weld products clamped on the fixture. Compared with the prior art, this invention has the advantages of fast processing efficiency, high yield, and wide applicability. It can ensure the accuracy of laser welding, effectively achieve sealed welding of small-sized products, and is safer and more reliable.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a distributed laser welding machine. Background Technology

[0002] Laser welding machines, also known as laser welders or laser arc welding machines, are welding devices that use high-energy laser beams to process materials. They are mainly used in automotive manufacturing, electronics, biomedicine, and mold repair. Currently, laser welding machines are primarily suitable for large components where sealing requirements are not high; however, they are unsuitable for small-sized products, such as electronic cigarettes and medical products, where sealing requirements are high, making them prone to problems like incomplete welds and burn-through. Therefore, there is an urgent need to solve these problems. Summary of the Invention

[0003] To address the aforementioned problems, the present invention achieves the above objectives through the following technical solution: a top-bottom distributed laser welding machine, comprising a fixture and a welding device, wherein the fixture includes a positioning seat, a first driver, and a second driver; the positioning seat has a positioning groove on its top and a clearance hole communicating with the bottom of the positioning groove on its bottom; the first driver is driven to a push rod, the end of which extends into the clearance hole, and the first driver is used to drive the push rod away from or towards the bottom of the positioning groove; the second driver is driven to a pressure plate, and the second driver drives the pressure plate towards or away from the opening of the positioning groove, wherein at least the area of ​​the pressure plate relative to the positioning groove is made of transparent material; The welding device includes a laser galvanometer disposed above the fixture, which emits a laser beam in a vertical direction to weld the product clamped on the fixture.

[0004] Furthermore, the fixture also includes a first linear module that drives the positioning seat to approach or move away from the welding device, the positioning seat being connected to the working end of the first linear module; a first bracket is provided on the side of the first linear module, the second driver is mounted on the first bracket, and the pressure plate is fixed to the working end of the second driver.

[0005] Furthermore, the pressure plate has a gantry structure, with the first bracket slidably connected to both ends of the pressure plate. Buffer blocks are fixed to the top surface of the first bracket and the bottom surface of the pressure plate, respectively. This ensures smooth operation of the pressure plate and prevents damage to the product.

[0006] Furthermore, the first bracket is fixed with a slide rail in the vertical direction, and the pressure plate is provided with a slider that matches the slide rail. This ensures the smooth operation of the pressure plate, reliably presses the product down, prevents skewing that could affect welding quality, and improves the yield rate.

[0007] Furthermore, safety light curtains are respectively installed on the outer edges of the two first supports. These provide protection, stopping the machine immediately and preventing operators' hands or other objects from suddenly entering the working machine, thus enhancing safety and reliability.

[0008] Furthermore, a floating connecting seat is installed between the working end of the first linear module and the positioning seat. The floating connecting seat includes a base and a connecting plate. The base is fixed to the working end of the first linear module and has a sliding sleeve. The positioning seat is fixed to the connecting plate, and the connecting plate has a guide post that slides with the sliding sleeve. The guide post extends vertically, and an elastic element connects the base and the connecting plate. Through the function of the floating connecting seat, the product has vertical floating space when pressed by the pressure plate, better adapting to the product size, avoiding damage from rigid collisions, and improving the yield rate.

[0009] Furthermore, the first driver is mounted on the base, one end of the push rod is rotatably connected to the output shaft of the first driver, the other end of the push rod is disposed in the clearance hole, and the middle part of the push rod is rotatably connected to the base. This allows the push rod to push the product out from the bottom of the positioning groove, facilitating product removal and improving processing efficiency.

[0010] Furthermore, the welding device also includes a second support spanning the end of the first linear module. A second linear module is mounted on the second support, extending horizontally and perpendicular to the extension direction of the first linear module. A third linear module is mounted at the working end of the second linear module, arranged vertically. The laser galvanometer is mounted on the working end of the third linear module. This design allows the laser galvanometer to be moved to any position, precisely focusing the laser beam onto the welding surface of the product, resulting in high welding accuracy. It can also adapt to welding surfaces of any shape, making it widely applicable.

[0011] Furthermore, at least two sets of the fixtures are arranged side by side, and the extension direction of the second linear module is perpendicular to the side-by-side direction of each fixture. This improves processing efficiency and allows the welding device to operate continuously.

[0012] Furthermore, the pressure plate has mounting holes in the area opposite to the positioning groove, and annular clamping frames are fixed at both ends of the mounting holes, with a transparent plate pressed between the two annular clamping frames. This allows for easy replacement of the transparent area, ensuring light transmittance, avoiding welding quality issues, and is also compatible with different products, making it widely applicable.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the positioning seat can accurately position the product, and under the operation of the second driver, the pressure plate can be driven to clamp the product from top to bottom. The area of ​​the pressure plate relative to the positioning groove is made of transparent material, so that the laser beam emitted by the upper laser galvanometer can be properly focused on the product, and the focus of the laser beam can always be located on the welding surface of the product, effectively ensuring welding accuracy and avoiding problems such as incomplete welding and burn-through. At the same time, under the operation of the first driver, the push rod can be driven to push the product out from the bottom of the positioning groove, so as to facilitate the removal of the product, making unloading relatively convenient and improving processing efficiency. Overall, the present invention has the advantages of fast processing efficiency, high yield rate and wide applicability, can ensure the accuracy of laser welding, effectively realize the sealing welding of small-sized products, and is safer and more reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention after the removal of the enclosure. Figure 3 This is a schematic diagram of the fixture in this invention; Figure 4 This is a schematic diagram of the fixture in another direction in this invention; Figure 5 This is a schematic diagram of the connection of the positioning seat in this invention; Figure 6 This is an exploded view of the floating connector in this invention; Figure 7 This is a schematic diagram of the welding device in this invention; Figure 8 This is an exploded view of a product in the prior art.

[0015] The reference numerals in the attached drawings are explained as follows: 1-Clamp; 1A-Positioning seat; 1A1-Positioning groove; 1A2-Allowing hole; 1B-First driver; 1C-Second driver; 1D-Top rod; 1E-Pressure plate; 1E1-Annular clamping frame; 1E2-Transparent plate; 1E3-Pressure block; 1F-First linear module; 1G-First bracket; 1H-Buffer block; 1I-Slide rail; 1J-Slider; 1K-Safety light curtain; 1L-Floating connecting seat; 1L1-Base; 1L2-Connecting plate; 1L3-Sliding sleeve; 1L4-Guide post; 1L5-Elastic element; 2-Welding device; 2A-Laser galvanometer; 2B-Second support; 2C-Second linear module; 2D-Third linear module; 3-Frame; 3A-Adjustable support feet; 3B-Cassette casters; 4-Safety devices; 4A-Enclosure; 4A1-Material inlet; 4B-Alarm; 4C-Control panel; 100 - Base; 101 - Welding surface; 200 - Top cover. Detailed Implementation

[0016] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0018] like Figures 1 to 8 As shown, the present invention provides a top-bottom distributed laser welding machine, including a fixture 1 and a welding device 2. The fixture 1 includes a positioning seat 1A, a first driver 1B and a second driver 1C. The top of the positioning seat 1A has a positioning groove 1A1 and the bottom of the positioning seat 1A has a clearance hole 1A2 communicating with the bottom of the positioning groove 1A1. The first driver 1B is driven to a push rod 1D, the end of which extends into the clearance hole 1A2. The first driver 1B is used to drive the push rod 1D away from or near the bottom of the positioning groove 1A1. The second driver 1C is driven to a pressure plate 1E, which is driven to move the pressure plate 1E closer to or away from the opening of the positioning groove 1A1. At least the area of ​​the pressure plate 1E relative to the positioning groove 1A1 is made of transparent material. The welding device 2 includes a laser galvanometer 2A disposed above the fixture 1. The laser galvanometer 2A can emit a laser beam in a vertical direction to weld the product clamped on the fixture 1.

[0019] The fixture 1 also includes a first linear module 1F that drives the positioning seat 1A to approach or move away from the welding device 2. The positioning seat 1A is connected to the working end of the first linear module 1F. A first bracket 1G is provided on the side of the first linear module 1F. A second driver 1C is mounted on the first bracket 1G. A pressure plate 1E is fixed to the working end of the second driver 1C.

[0020] The pressure plate 1E has a gantry-type structure, with first supports 1G slidably connected to both ends of the pressure plate 1E. Buffer blocks 1H are fixed to the top surface of the first supports 1G and the bottom surface of the pressure plate 1E, respectively. A slide rail 1I is fixed vertically on the first supports 1G, and a slider 1J adapted to the slide rail 1I is provided on the pressure plate 1E. Preferably, the slide rail 1I and the slider 1J are symmetrically arranged to ensure balanced force, prevent the product from being pressed out of shape, and improve welding accuracy.

[0021] Safety light curtains 1K are respectively installed on the outer sides of the two first supports 1G. The safety light curtains 1K are preferably through-beam type, effectively preventing the operator's hands or other objects from suddenly entering under the welding device 2 while it is in operation, and can stop work immediately to ensure the safety of the machine and personnel. Specifically, the safety light curtain 1K is installed at the feed inlet 4A1, and a bracket for installing the safety light curtain 1K is fixed on the enclosure 4A (see reference). Figure 1 (As shown).

[0022] A floating connecting seat 1L is installed between the working end of the first linear module 1F and the positioning seat 1A. The floating connecting seat 1L includes a base 1L1 and a connecting plate 1L2. The base 1L1 is fixed to the working end of the first linear module 1F, and a sliding sleeve 1L3 is provided on the base 1L1. The positioning seat 1A is fixed on the connecting plate 1L2, and a guide post 1L4 is provided on the connecting plate 1L2 to slide with the sliding sleeve 1L3. The guide post 1L4 extends vertically. An elastic element 1L5 connects the base 1L1 and the connecting plate 1L2. The elastic element 1L5 is preferably a cylindrical spring. Specifically, sliding sleeves 1L3 are provided on the four sides of the base 1L1, and guide posts 1L4 are also provided accordingly. Elastic elements 1L5 are provided at the four corners of the base 1L1 to ensure force balance, prevent the clamped product from tilting, keep the product base and top cover in tight fit, improve welding accuracy, and avoid incomplete welding.

[0023] In some embodiments, four sets of floating connecting seats 1L are arranged side by side on the first linear module 1F. Each floating connecting seat 1L is provided with a positioning seat 1A, a top rod 1D and other corresponding components. The transparent plate 1E2 above is also provided accordingly, so that four products can be clamped and welded at the same time to improve processing efficiency. Of course, fewer or more floating connecting seats 1L and matching positioning seats 1A and transparent plates 1E2 can be provided according to the actual situation, which will not be described in detail here.

[0024] The first driver 1B is mounted on the base 1L1. One end of the push rod 1D is rotatably connected to the output shaft of the first driver 1B, and the other end of the push rod 1D is located in the clearance hole 1A2. The middle part of the push rod 1D is rotatably connected to the base 1L1.

[0025] refer to Figure 7As shown, the welding device 2 also includes a second support 2B, which spans the end of the first linear module 1F. A second linear module 2C is mounted on the second support 2B, extending horizontally and perpendicular to the extension direction of the first linear module 1F. A third linear module 2D is mounted at the working end of the second linear module 2C, arranged vertically. A laser galvanometer 2A is mounted at the working end of the third linear module 2D. Preferably, the second support 2B also adopts a gantry structure. The welding device 2 uses a galvanometer-type welding equipment, and its control system, power system, auxiliary systems, and other supporting systems are all equipped accordingly and can be directly purchased on the market. Specific structures and equipment debugging will not be detailed here; those skilled in the art will understand.

[0026] refer to Figure 1 and Figure 2 As shown, in some other embodiments, at least two sets of fixtures 1 are arranged side by side, and the extension direction of the second linear module 2C is perpendicular to the side-by-side direction of each fixture 1. This allows the laser galvanometer 2A to move to the corresponding fixture 1 during actual operation, enabling alternating welding of products on the two sets of fixtures 1, thus improving processing efficiency. Of course, more sets of fixtures 1 can be set according to actual needs, and the lengths of the second linear modules 2C can be matched accordingly.

[0027] The pressure plate 1E has mounting holes in the area opposite the positioning groove 1A1. Annular clamping frames 1E1 are fixed to both ends of the mounting holes, and a transparent plate 1E2 is pressed between the two annular clamping frames 1E1. The transparent plate 1E2 is preferably made of high-transparency glass or acrylic sheet to reduce laser beam attenuation and prevent incomplete welding. A sealing ring or other flexible gasket is pressed between the annular clamping frames 1E1 and the transparent plate 1E2 to ensure a secure connection between the transparent plate 1E2 and the annular clamping frames 1E1, preventing shaking or gaps. In practice, the annular clamping frames 1E1 can be disassembled and reassembled to quickly replace damaged or aged transparent plates 1E2, avoiding interference with laser beam transmission and ensuring normal welding. Compared to a one-piece pressure plate 1E structure, this structure has lower installation costs, is easier to assemble and disassemble, and effectively ensures production efficiency.

[0028] For details, please refer to Figure 4 As shown, in some embodiments, a pressure block 1E3 is provided in the middle of the transparent plate 1E2. The bottom end of the pressure block 1E3 protrudes from the bottom surface of the annular clamping frame 1E1, so that the pressure block 1E3 is actually pressing down on the product. The pressure block 1E3 can be made of opaque material, but it should be noted that the welding surface of the product is annular in shape larger than the outer dimensions of the pressure block 1E3. The pressure block 1E3 can tightly press down on the product. At this time, the transparent area of ​​the pressure plate 1E is also an annular shape that matches it, which will not affect normal welding and can improve welding accuracy.

[0029] It is worth mentioning that all devices are mounted on the frame 3, and the devices are electrically connected via a PLC controller, thereby coordinating and controlling the operation of each device to achieve automation. The specific implementation of the electrical connection and debugging will be clear and understandable to those skilled in the art after reading this application, and will not be elaborated here. Adjustable support feet 3A are provided at the four corners of the bottom of the frame 3, and casters 3B are also provided at the four corners of the bottom of the frame 3, facilitating the movement of the entire machine and allowing it to be placed stably in any position. A protective device 4 is provided on the frame 3, including a barrier 4A surrounding the outer edge of the frame 3. All devices are located inside the barrier 4A. The front of the barrier 4A has a feed inlet 4A1 opposite to the feed end of the first linear module 1F, where products can be manually or mechanically fed into the positioning slot 1A1. An alarm 4B is provided at the top of the barrier 4A, and the front of the barrier 4A has an operating panel 4C, control buttons, an emergency stop button, and other operating mechanisms, making operation more convenient and safer.

[0030] It should be noted that the reference Figure 8 As shown, the product welded in this embodiment is a component of a blood glucose meter, which includes a base 100 and a top cover 200. The welding surface 101 is located inside the base 100 and is annular.

[0031] The specific working principle of this application is as follows: First, the base of the product is placed in the positioning groove 1A1, and then the top cover of the product is placed on the base. The laser welding machine is started, and the first linear module 1F moves the product inside, close to the welding device 2, and reaches below the laser galvanometer 2A. Then, the second driver 1C works, driving the pressure plate 1E1 to move downward, thereby firmly pressing the product in the positioning groove 1A1 and making the base and the top cover fit tightly together, thereby achieving the positioning and clamping of the product. Then, the welding device 2 works. Under the joint action of the second linear module 2C and the third linear module 2D, the laser beam emitted by the laser galvanometer 2A is focused on the welding surface and a full ring welding is performed along the welding surface to complete the welding operation, so that the base and the top cover achieve a sealed connection. Then the second driver 1C drives the pressure plate 1E to move upward and return to the initial state. The first linear module 1F moves the welded product to the material port 4A1. At the same time, the first driver 1B drives the push rod 1D to approach the bottom of the positioning groove 1A1 and push the product upward so that the product leaves the positioning groove 1A1 for quick material removal. This cycle is repeated to continuously and automatically weld products.

[0032] In summary, the technical solution of this invention can fully and effectively achieve the above-mentioned objectives. Furthermore, the structure and functional principles of this invention have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this invention, various changes or modifications can be made to the embodiments. Therefore, this invention includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A distributed laser welding machine, comprising a fixture and a welding device, characterized in that: The fixture includes a positioning seat, a first driver, and a second driver. The positioning seat has a positioning groove on its top and a clearance hole at its bottom that communicates with the bottom of the positioning groove. The first driver is driven by a push rod, the end of which extends into the clearance hole. The first driver is used to drive the push rod away from or towards the bottom of the positioning groove. The second driver is driven by a pressure plate, which is driven by the second driver to move the pressure plate closer to or away from the opening of the positioning groove. At least the area of ​​the pressure plate relative to the positioning groove is made of transparent material. The welding device includes a laser galvanometer disposed above the fixture, which emits a laser beam in a vertical direction to weld the product clamped on the fixture.

2. The distributed laser welding machine according to claim 1, characterized in that: The fixture further includes a first linear module that drives the positioning seat to approach or move away from the welding device. The positioning seat is connected to the working end of the first linear module. A first bracket is provided on the side of the first linear module. The second driver is mounted on the first bracket. The pressure plate is fixed to the working end of the second driver.

3. The distributed laser welding machine according to claim 2, characterized in that: The pressure plate has a gantry structure, and the first bracket is slidably connected to both ends of the pressure plate. Buffer blocks are fixed on the top surface of the first bracket and the bottom surface of the pressure plate.

4. The distributed laser welding machine according to claim 3, characterized in that: The first bracket is fixed with a slide rail in the vertical direction, and the pressure plate is provided with a slider that matches the slide rail.

5. The distributed laser welding machine according to claim 3, characterized in that: Safety light curtains are respectively provided on the outer sides of the two first brackets.

6. The distributed laser welding machine according to claim 1, characterized in that: A floating connecting seat is installed between the working end of the first linear module and the positioning seat. The floating connecting seat includes a base and a connecting plate. The base is fixed to the working end of the first linear module and a sliding sleeve is provided on the base. The positioning seat is fixed to the connecting plate and a guide post is provided on the connecting plate that slides with the sliding sleeve. The guide post extends in the vertical direction. An elastic element connects the base and the connecting plate.

7. The distributed laser welding machine according to claim 6, characterized in that: The first driver is mounted on the base, one end of the push rod is rotatably connected to the output shaft of the first driver, the other end of the push rod is disposed in the clearance hole, and the middle part of the push rod is rotatably connected to the base.

8. The distributed laser welding machine according to claim 2, characterized in that: The welding device further includes a second support, which spans the end of the first linear module. The second support is provided with a second linear module, which extends horizontally and is perpendicular to the extension direction of the first linear module. A third linear module is provided at the working end of the second linear module, which is arranged vertically. The laser galvanometer is mounted at the working end of the third linear module.

9. The distributed laser welding machine according to claim 8, characterized in that: The clamps are arranged in at least two sets side by side, and the extension direction of the second linear module is perpendicular to the side-by-side direction of each clamp.

10. The distributed laser welding machine according to claim 1, characterized in that: The pressure plate has an installation hole in the area opposite to the positioning groove. An annular clamping frame is fixed at both ends of the installation hole, and a transparent plate is pressed between the two annular clamping frames.

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