Plastic cap assembly mechanism and laser plastic welding apparatus

Abstract

The utility model relates to laser welding technical field provides a kind of plastic cover assembly mechanism, including plastic cover storehouse, plastic cover feeding manipulator, flexible vibration disc and plastic cover distribution subassembly, the plastic cover storehouse, for storing plastic cover;The plastic cover feeding manipulator is for grabbing the plastic cover provided by the plastic cover storehouse, and plastic cover is assembled to product;The flexible vibration disc is for receiving the plastic cover sent by the plastic cover storehouse and vibrating out non-overlapping plastic cover;The plastic cover distribution subassembly is used to control the number of plastic cover that the plastic cover storehouse supplies for the flexible vibration disc each time.The utility model also provides a kind of laser plastic welding equipment.The utility model uses plastic cover assembly mechanism and can realize the accurate delivery of plastic cover, improves assembly efficiency and yield.

Description

Technical Field

[0001] This utility model relates to the field of laser welding technology, specifically to a plastic cap assembly mechanism and a laser plastic welding equipment. Background Technology

[0002] With the development of technology, many traditional industries are moving towards intelligent manufacturing. In this process, the packaging of electronic components becomes particularly important. Traditional packaging methods, such as thermoforming, dispensing, and ultrasonic welding, have become obstacles to development due to their poor sealing and waterproofing, and the vibrations generated during welding. However, with the development of laser technology, laser welding is becoming increasingly widely used due to its significant advantages such as seamless joints, high precision, and high strength. However, current laser welding largely relies on manual loading and unloading, which consumes a large amount of manpower during mass production, subjecting workers to repetitive tasks and resulting in low yield rates. Utility Model Content

[0003] The purpose of this invention is to provide a plastic cap assembly mechanism and a laser plastic welding equipment, which can at least solve some of the defects in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a plastic cap assembly mechanism, comprising a plastic cap hopper, a plastic cap loading robot, a flexible vibrating plate, and a plastic cap dispensing assembly.

[0005] The plastic cap hopper is used to store plastic caps;

[0006] The plastic cap loading robot is used to grab the plastic caps provided by the plastic cap hopper and assemble the plastic caps onto the product.

[0007] The flexible vibrating plate is used to receive the plastic caps sent from the plastic cap hopper and vibrate them to produce non-overlapping plastic caps.

[0008] The plastic cap dispensing assembly is used to control the number of plastic caps supplied by the plastic cap hopper to the flexible vibrating plate each time.

[0009] Furthermore, the plastic cap dispensing assembly includes a conveying device for receiving plastic caps falling from the plastic cap hopper and sending the plastic caps to the flexible vibrating plate, wherein the plastic cap hopper is connected to the flexible vibrating plate via the conveying device.

[0010] Furthermore, the plastic cap dispensing assembly also includes a sensor for sensing the number of plastic caps.

[0011] Furthermore, the sensor is located on the plastic cover hopper or the conveying device.

[0012] Furthermore, the conveying device includes a pusher and a belt conveyor. The pusher is used to push the plastic cover onto the belt conveyor, and the belt conveyor is used to transport the plastic cover onto the flexible vibrating plate.

[0013] Furthermore, the flexible vibrating disc has a soft disc surface.

[0014] Furthermore, it also includes a first camera, which is located above the plastic cover hopper.

[0015] Furthermore, it also includes a second camera for confirming the posture of the plastic cap grasped by the plastic cap loading robot.

[0016] This utility model embodiment also provides the following technical solution: a laser plastic welding device, including the above-mentioned plastic cover assembly mechanism.

[0017] Furthermore, it also includes loading and unloading components, product jigs, and laser welding and pressing devices.

[0018] The loading and unloading assembly is used to feed the product to the product fixture and to remove the welded product.

[0019] The product fixture is used to receive products and transfer them between the loading / unloading assembly, the plastic cap assembly mechanism, and the laser welding and pressing device.

[0020] The laser welding and pressing device is used to laser weld the plastic cap onto the product.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the plastic cap assembly mechanism can achieve precise delivery of plastic caps, improving assembly efficiency and yield. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a laser welding pressing device for a laser plastic welding equipment provided in an embodiment of this utility model (showing the inside of the frame);

[0023] Figure 2 A schematic diagram of the structure of a product fixture for a laser plastic welding equipment provided in this embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a laser plastic welding device provided for an embodiment of this utility model;

[0025] Figure 4 for Figure 3 A top-down view of the structure;

[0026] Figure 5A schematic diagram of the plastic cover feeding assembly of a laser plastic welding equipment plastic cover assembly mechanism provided in this embodiment of the present utility model;

[0027] Figure 6 A schematic diagram of the structure of a product loading and unloading robot for a laser plastic welding equipment provided in this embodiment of the utility model;

[0028] In the attached diagram, the following labels are used: 1-Laser welding and pressing device; 10-Pressure plate; 11-Penetrating depth detection component; 12-Pressure detection component; 13-Laser module; 14-Frame; 140-Guide rod; 15-Cylinder; 16-Linear module; 2-Product fixture; 20-Supporting part; 21-Groove; 22-Reference surface; 23-Elastic positioning component; 24-Rigid shell; 3-Loading and unloading component; 30-Pattern; 31-Product loading and unloading robot; 310-Gripper; 311-Positioning camera; 32-Production line module; 33-Blocking mechanism; 4-Plastic cap assembly mechanism; 40-Plastic cap loading component; 400-Plastic cap hopper; 401-Flexible vibrating plate; 41-Plastic cap loading robot; 42-Plastic cap sorting component; 43-First camera; 44-Second camera; 5-Laser cooling water tank; 6-NG receiving area. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] Please see Figures 1 to 6This utility model provides a laser plastic welding equipment, including a loading and unloading assembly 3, a product fixture 2, a plastic cap assembly mechanism 4, and a laser welding pressing device 1. The loading and unloading assembly 3 is used to feed products to the product fixture 2 and remove welded products. The product fixture 2 is used to receive products and transfer them between the loading and unloading assembly 3, the plastic cap assembly mechanism 4, and the laser welding pressing device 1. The plastic cap assembly mechanism 4 is used to assemble plastic caps onto the products. The laser welding pressing device 1 is used to laser weld the plastic caps onto the products. In this embodiment, automated welding is achieved through the loading and unloading assembly 3, the product fixture 2, the plastic cap assembly mechanism 4, and the laser welding pressing device 1. The previous method of one person operating one machine has been replaced by one person operating multiple machines, saving manpower, reducing labor intensity, and improving production yield. Specifically, the loading / unloading assembly 3 can transfer products not yet assembled with plastic caps to the product fixture 2, and can also remove welded products from the product fixture 2. The product fixture 2 moves along the linear module 16, reaching various workstations. The loading / unloading assembly 3, the laser welding and pressing device 1, and the plastic cap assembly mechanism 4 are arranged sequentially along the length of the linear module 16. The product can be loaded and unloaded in one round trip. The plastic cap assembly mechanism 4 can assemble the plastic cap onto the product, and then the plastic cap is laser welded onto the product at the laser welding and pressing device 1. At this time, the product fixture 2 returns to the position of the loading / unloading assembly 3 along the linear module 16 for unloading and a new round of loading. Since it is a dual-workstation system, welding can be carried out on one side while loading / unloading and assembly can be performed on the other side. This dual-workstation switching operation saves waiting time and improves production efficiency.

[0031] For a more detailed description of the loading and unloading assembly 3 described above, please refer to [link / reference]. Figure 3 and Figure 4 The loading / unloading assembly 3 includes a tray 30 for placing products before and after assembly, and a product loading / unloading robot 31 for removing products from the tray 30 and sending them to the product fixture 2. In this embodiment, the loading / unloading assembly 3 includes a tray 30 and a product loading / unloading robot 31. The tray 30 can store products before welding and products after welding. When all the products before welding on the tray 30 are replaced by products after welding, the tray 30 can be sent away and a new tray 30 can be sent in. The function of the product loading / unloading robot 31 is to transport products before and after welding. Preferably, the detailed structure of the product loading / unloading robot 31 is as follows: Figure 6As shown, it includes a positioning camera 311 and four grippers 310. All four grippers 310 are rotatable to simultaneously grip two products. For example, two grippers 310 can grab two unwelded products from the tray 30 and send them to the product fixture 2. At this time, the product fixture 2 has two already welded products. The other two grippers 310 can then grab these two welded products and simultaneously place the two unwelded products on the product fixture 2. This saves the time of the robotic arm's material handling cycle and greatly improves work efficiency. The positioning camera 311 ensures precise gripping by providing coordinate positions after taking a picture.

[0032] For further optimization of the above solution, please refer to [link / reference]. Figures 1 to 6 The tray 30 is mounted on the assembly line module 32, and the direction in which the assembly line module 32 transports the tray 30 is consistent with the direction of the product fixture 2. In this embodiment, the tray 30 can be mounted on the assembly line module 32, so that the assembly line module 32 can send away the tray 30 after the welding of the replaced product, and send the new tray 30 to the loading and unloading assembly 3. The assembly line module 32 is located on one side of the machine body.

[0033] For further optimization of the above solution, please refer to [link / reference]. Figures 1 to 6 The assembly line module 32 is equipped with a blocking mechanism 33 that can prevent the pallet 30 from moving. In this embodiment, the blocking mechanism 33 is designed to block the pallet 30 on the assembly line module 32, causing it to stop at the position of the loading / unloading assembly 3 for loading and unloading. Preferably, the blocking mechanism 33 uses a lifting and positioning method for blocking, for example, using a cylinder 15 to drive a push rod to lift the baffle or an electric push rod to lift the baffle.

[0034] For a more detailed description of the plastic cap assembly mechanism 4 described above, please refer to [link / reference]. Figure 3 , Figure 4 and Figure 5 The plastic cap assembly mechanism 4 includes a plastic cap feeding assembly 40 and a plastic cap feeding robot 41. The plastic cap feeding assembly 40 is used to provide plastic caps; the plastic cap feeding robot 41 is used to grasp the plastic caps provided by the plastic cap feeding assembly 40 and assemble the plastic caps onto the product on the product fixture 2. In this embodiment, the plastic cap assembly mechanism 4 includes two parts: one is how to supply the plastic caps, and the other is how to deliver the supplied plastic caps to the product on the product fixture 2. Specifically, the plastic cap feeding assembly 40 is used to provide the plastic caps, and the plastic cap feeding robot 41 is used to grasp the plastic caps and deliver them to the product on the product fixture 2.

[0035] For further optimization of the above solution, please refer to [link / reference]. Figure 3 , Figure 4 and Figure 5The plastic cap feeding assembly 40 includes a plastic cap hopper 400 and a flexible vibrating plate 401. The plastic cap hopper 400 stores plastic caps, and the flexible vibrating plate 401 receives plastic caps from the plastic cap hopper 400 and vibrates them to form non-overlapping plastic caps. In this embodiment, the plastic cap hopper 400 and the flexible vibrating plate 401 are used to provide plastic caps. The plastic cap hopper 400 stores plastic caps, allowing multiple plastic caps to be placed in it. The flexible vibrating plate 401 receives the plastic caps and vibrates them to form non-overlapping plastic caps, thus facilitating the gripper 41 to pick up the plastic caps. The flexible vibrating plate 401 has a soft surface to prevent damage to the plastic caps during vibration.

[0036] For further optimization of the above solution, please refer to [link / reference]. Figure 3 , Figure 4 and Figure 5 The plastic cap assembly mechanism 4 further includes a plastic cap dispensing component 42, which controls the number of plastic caps supplied by the plastic cap hopper 400 to the flexible vibrating plate 401 each time. In this embodiment, since the amount of material stored in the plastic cap hopper 400 can vary, the amount discharged can also vary. If the flexible vibrating plate 401 is directly connected to the plastic cap hopper 400, too much or too little material will affect the efficiency of the flexible vibration. By setting the plastic cap dispensing component 42 in this embodiment, the amount of material fed each time can be controlled within a certain range. Preferably, the plastic cap dispensing component 42 includes a sensor and a conveying device. The sensor can detect the amount of material. If the amount of material is too small, the conveying device will start conveying the material to the dispensing mechanism; otherwise, it will not. The sensor is located on the plastic cap hopper or the conveying device. This conveying device is a small pusher, which is used to push the plastic caps onto the belt conveyor, which is used to transport the plastic caps onto the flexible vibrating plate. The small pusher is driven by a cylinder and uses stepped material distribution to ensure that the sample delivery is within a certain quantity. If the pusher is used directly for feeding, the large amount of material at the beginning can easily scratch the caps. If a material hopper and belt conveyor are used directly, the output quantity cannot be well controlled. Therefore, the two are combined to utilize their respective advantages, so that the output quantity can be controlled within a certain range while avoiding scratching the product. The conveying device is used to receive the plastic caps that fall from the plastic cap hopper 400 and then send the plastic caps to the flexible vibrating plate 401. The first camera 43 can monitor the delivery of plastic caps in real time by taking pictures and calculating the area. If the quantity is sufficient, the conveying stops; if the quantity is insufficient, the conveying starts. In this way, the quantity supply of plastic caps can be controlled.

[0037] For further optimization of the above solution, please refer to [link / reference]. Figure 3 , Figure 4 and Figure 5The plastic cap assembly mechanism 4 also includes a first camera 43 and a second camera 44. The first camera 43 is located above the plastic cap hopper 400 and is the highest-positioned camera, which can be defined as a wide-field camera. Its function is to determine the number of plastic caps by taking pictures and to mark the position of the plastic caps that can be grasped. If there are no plastic caps that can be marked at this time, the flexible vibrating plate 401 vibrates again and repeats the marking action. The marking method can be to select plastic caps with suitable position and posture by calculating the area. After the marking is completed, the plastic cap loading robot 41 will come to the flexible vibrating plate 401 to grasp the marked plastic caps after receiving the instruction. The plastic cap loading robot 41 can not only move up, down, left and right, but also rotate to improve the grasping speed. After grasping, the plastic cap loading robot 41 will take the plastic cap to the second camera 44 for a second precise positioning to ensure that the front and back, posture and other parameters of the grasped plastic cap are correct. After that, the plastic cap can be sent to the product on the product fixture 2. After completing this action, the above actions are repeated to continue to grasp plastic caps and load them.

[0038] For a more detailed description of the laser welding pressing device 1 described above, please refer to [link to relevant documentation]. Figures 1 to 4The laser welding pressing device 1 includes a pressure plate 10 for pressing the product onto the product fixture 2, a weld depth detection component 11 for detecting the weld depth of the product, a pressure detection component 12 for detecting the pressing force, and a laser module 13 for welding. In this embodiment, after the plastic cap is delivered onto the product on the product fixture 2, the product fixture 2 is driven by the linear module 16 to the station of the laser welding pressing device 1 for laser welding. During the laser welding process, the pressure plate 10 is used to press the product to ensure the plastic cap adheres to the product. Simultaneously, the weld depth detection component 11 is used to detect the weld depth, and the pressure detection component 12 is used to detect the pressing force. Only after all these parameters are checked can the laser module 13 be used for laser welding. The specific working steps here are as follows: After the linear module 16 moves the product fixture 2 into place, the pressure plate 10 presses down. Then, the melt depth detection component 11 measures the height, and the pressure detection component 12 measures the combined pressure. After the height measurement is correct, the melt depth detection component 11 is zeroed. At this time, the laser module 13 emits light for welding while the melt depth detection component 11 measures the height in real time. After the melt depth is compared with the initial value and is correct, the laser stops emitting light, the pressure plate 10 rises, and the linear module 16 then brings the product fixture 2 to the loading and unloading component 3. In this process, two melt depth measurements are performed. The first melt depth measurement is to determine whether the assembled plastic cover is properly assembled with the product. This can be determined by the height detection of the melt depth detection component 11. After the measurement, the detection data of the melt depth detection component 11 is zeroed. This is because each product has different dimensions and is not exactly the same. Therefore, after the first measurement and zeroing, a second measurement is performed to accurately measure the true melt depth of each product, preventing defective products due to excessive differences in the products themselves. In this embodiment, both the melt depth detection component 11 and the pressure detection component 12 can be directly adopted from commercially available mature modules. There are various ways to detect melt depth. This embodiment uses height monitoring to determine melt depth, so it can be used to determine whether the product is properly assembled. The height monitoring method can be a sensor or a camera, either is acceptable. The pressure detection component 12 can use a pressure sensor to obtain pressure values. If there is excessive fluctuation during the monitoring process, an alarm module can be triggered.

[0039] For further optimization of the above solution, please refer to [link / reference]. Figures 1 to 4The laser welding pressing device 1 further includes a frame 14, on which the pressure plate 10, the penetration depth detection component 11, and the pressure detection component 12 are all mounted. The frame 14 has a welding area for the product fixture 2 to enter. In this embodiment, the pressure plate 10, penetration depth detection component 11, and pressure detection component 12 are all mounted on the frame 14, which can be a gantry frame to form a welding area for the product fixture 2 to enter. Preferably, the frame 14 includes a guide rod 140 for the pressure plate 10 to slide on, and the pressure plate 10 is connected to a cylinder 15. The welding area is located on the drive path of the linear module 16. This guide rod 140 facilitates precise movement of the pressure plate 10 when driven by the cylinder 15. The pressure detection component 12 is located below the cylinder 15 and can monitor the pressure in real time. Preferably, there are multiple melt depth detection components 11, each of which is arranged around the top of the frame 14. Multiple melt depth detection components 11 can improve the accuracy of melt depth detection, and can detect melt depth in all directions. There are two linear modules 16, which can realize the simultaneous operation of two lines. An NG material receiving area 6 is provided between the two linear modules 16, which can be used to collect NG materials.

[0040] For a detailed description of product fixture 2, please refer to [link / reference]. Figure 1 The product fixture 2 includes a support portion 20 for supporting the product, and the support portion 20 has several grooves 21 into which the protrusions of the product extend. In this embodiment, the grooves 21 in the support portion 20 facilitate initial positioning of the product after it is placed in. Preferably, the support portion 20 is an elastic block, which is disposed within a rigid shell 24. Since plastic welding requires high flatness, and the flatness accuracy of general plastic products is not very high, this embodiment improves upon the fixture by designing the support portion 20 for supporting the product as elastic, such as rubber. This allows the product to fit tightly against the support portion 20 when the pressure plate 10 is pressed down, which can significantly improve the flatness of products with poor flatness. However, for some irregularly shaped products, under large pressing forces, irregular displacement may occur due to the irregular shape, poor flatness, and uneven force. This is a very unfavorable factor in laser welding, as positional displacement can lead to defects such as incomplete welds, bubbles, and smoke. Therefore, if the entire product fixture 2 is made of elastic material, certain defective products will be produced during the actual welding process. Therefore, in this embodiment, a rigid shell 24 is designed around the support part 20, which can overcome the poor flatness and ensure that the product does not shift. It should be noted that the product of this application and the plastic cover mentioned above are all made of plastic, which means that plastic A needs to be laser welded onto plastic B.

[0041] For further optimization of the above solution, please refer to [link / reference]. Figure 1One wall of the groove 21 serves as a reference surface 22, and at least one of the other walls of the groove 21 is provided with a positioning structure. Preferably, the positioning structure is an elastic positioning component 23. In this embodiment, the positioning structure serves as a secondary positioning mechanism and also facilitates a larger gap between the product and the fixture, making it easier to place the product onto or remove it from the product fixture 2. The positioning structure can be an elastic positioning component 23, such as a telescopic push rod, a spring, or an elastic material layer.

[0042] Please see Figures 3 to 4 A laser cooling water tank 5 is also provided on one side of the machine body. The laser cooling water tank 5 can be used to cool the laser module 13 and extend the service life of the laser module 13.

[0043] Please see Figures 1 to 6 This utility model embodiment provides a laser plastic welding method, including the following steps: S1, the product is fed to the product fixture 2 using the loading and unloading assembly 3; S2, the product fixture 2 is transferred to the plastic cap assembly mechanism 4, and the plastic cap is assembled onto the product using the plastic cap assembly mechanism 4; S3, after assembly, the product fixture 2 is transferred to the laser welding pressing device 1, and the plastic cap is laser welded onto the product using the laser welding pressing device 1; S4, after welding is completed, the product fixture 2 is transferred to the loading and unloading assembly 3, and the welded product is removed using the loading and unloading assembly 3. In this embodiment, this welding method is used in the above-mentioned laser plastic welding equipment, which can realize automated laser welding, saving costs and improving work efficiency. All components and working logic in the above-mentioned equipment can be used in this method. For example, the loading and unloading assembly 3 has loading and unloading logic that works with the product loading and unloading robot 31. The plastic cover assembly mechanism 4 also has logic for cameras, vibration, etc. The laser welding and pressing device 1 also has detection logic for each stage. These will not be elaborated here. The above embodiments are all described in detail.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic cap assembly mechanism, characterized in that: This includes a plastic cap hopper, a plastic cap loading robot, a flexible vibrating plate, and a plastic cap dispensing assembly. The plastic cap hopper is used to store plastic caps; The plastic cap loading robot is used to grab the plastic caps provided by the plastic cap hopper and assemble the plastic caps onto the product. The flexible vibrating plate is used to receive the plastic caps sent from the plastic cap hopper and vibrate them to produce non-overlapping plastic caps. The plastic cap dispensing assembly is used to control the number of plastic caps supplied by the plastic cap hopper to the flexible vibrating plate each time.

2. The plastic cap assembly mechanism as described in claim 1, characterized in that: The plastic cap dispensing assembly includes a conveying device for receiving plastic caps falling from the plastic cap hopper and sending the plastic caps to the flexible vibrating plate. The plastic cap hopper is connected to the flexible vibrating plate through the conveying device.

3. The plastic cap assembly mechanism as described in claim 2, characterized in that: The plastic cap dispensing assembly also includes a sensor for sensing the number of plastic caps.

4. The plastic cap assembly mechanism as described in claim 3, characterized in that: The sensor is located on the plastic cover hopper or the conveying device.

5. The plastic cap assembly mechanism as described in claim 2, characterized in that: The conveying device includes a pusher and a belt conveyor. The pusher is used to push the plastic cover onto the belt conveyor, and the belt conveyor is used to transport the plastic cover onto the flexible vibrating plate.

6. The plastic cap assembly mechanism as described in claim 3, characterized in that: The flexible vibrating disc has a soft disc surface.

7. The plastic cap assembly mechanism as described in claim 1, characterized in that: It also includes a first camera, which is located above the plastic cover hopper.

8. The plastic cap assembly mechanism as described in claim 1, characterized in that: It also includes a second camera for confirming the orientation of the plastic cap grasped by the plastic cap loading robot.

9. A laser plastic welding device, characterized in that: Includes the plastic cap assembly mechanism as described in any one of claims 1-8.

10. The laser plastic welding equipment as described in claim 9, characterized in that: It also includes loading and unloading components, product jigs, and laser welding and pressing equipment. The loading and unloading assembly is used to feed the product to the product fixture and to remove the welded product. The product fixture is used to receive products and transfer them between the loading / unloading assembly, the plastic cap assembly mechanism, and the laser welding and pressing device. The laser welding and pressing device is used to laser weld the plastic cap onto the product.

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