A spot welding device for PCBA processing

Abstract

The utility model provides a spot welding device for PCBA processing, including base and placing box, the top of base is provided with the door type mount, be provided with the left and right movement base in the top in the door type mount, the bottom of left and right movement base is connected with electric welding equipment through electric jar, the top of placing box is equipped with a row of placing groove, the top of base is provided with the front -back moving plate below electric welding equipment, the upper end surface fixed connection of front -back moving plate has the plug -in board close to both ends, the bottom of placing box is equipped with and the plug -in groove of plug -in board interworking. In the utility model, through setting up front -back moving plate, the two placing box of carrying PCBA on it are in spot welding station in turn, make one of placing box in the process of spot welding processing another placing box can be freely taken and placed, greatly improve the efficiency of PCBA continuous processing.

Description

Technical Field

[0001] This utility model relates to the field of PCBA board processing technology, specifically a spot welding device for PCBA processing. Background Technology

[0002] PCBA boards, or PCAs, are generally classified by their insulating components. Common materials include bakelite boards, fiberglass boards, and various types of plastic boards. The main processing steps for PCBA boards typically involve integrating components onto the PCB using surface mount technology (SMT) and die-in-the-loop (DIP) methods. The key difference is that SMT does not require drilling holes in the PCB, while DIP requires inserting component pins into pre-drilled holes. However, current spot welding equipment often uses manual loading for PCBA boards, placing each board sequentially under the welding device for processing. This results in low efficiency and poor performance.

[0003] Utility model CN217166914U discloses a spot welding device for PCBA processing, relating to the field of PCBA board processing. It includes a fixed base with a turntable rotatably mounted on its top. Multiple material boxes are inserted into the sidewall of the turntable along its circumference. Each material box includes a fixing block, an insert block, and a mounting slot. The bottom of the fixing block has an insert block, which is inserted into the sidewall of the turntable via the insert block. This utility model achieves PCBA board loading through turntable rotation. PCBA boards are placed in the mounting slots of the material boxes, and each material box can hold multiple PCBA boards. The material boxes are inserted into the turntable via the insert blocks. The rotation of the turntable drives the PCBA boards on the material boxes into the spot welding station of the spot welding mechanism for processing. This eliminates the need for repeated manual loading, allowing multiple PCBA boards to be processed at once, resulting in high processing efficiency and better performance. The material boxes containing PCBA boards can be stored on a side plate, inserted into slots, serving as temporary storage points for the material boxes and facilitating loading and unloading during the spot welding process.

[0004] However, the above-mentioned existing technologies still have shortcomings in use: 1. A large amount of welding fumes are generated during continuous processing. The welding fumes surround the welding equipment and are easily inhaled by the operators, thus affecting their health; 2. The material box is connected to the turntable by plug-in connection. There is plug-in resistance during plug-in, which makes docking difficult and results in inconvenient loading and unloading.

[0005] Therefore, this utility model provides a spot welding device for PCBA processing. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spot welding device for PCBA processing to solve the problems mentioned in the background technology. This utility model has the advantages of high continuous welding efficiency, more convenient and labor-saving loading and unloading, and reduced environmental pollution during processing.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a spot welding device for PCBA processing, comprising a base and a placement box, a gate-shaped fixing frame is provided above the base, a left and right movable seat is provided inside the gate-shaped fixing frame, the bottom of the left and right movable seat is connected to an electric welding device via an electric cylinder, a row of placement slots is opened on the top surface of the placement box, a front and rear movable plate is provided above the base and located below the electric welding device, an insert plate near both ends is fixedly connected to the upper end surface of the front and rear movable plate, a slot for inserting the insert plate is opened on the bottom surface of the placement box, and an exhaust hood covering the gate-shaped fixing frame is fixedly connected to the top of the base, with inlet and outlet notches on both the front and rear sides of the exhaust hood.

[0008] Furthermore, the upper surface of the base is welded with upright plates near the front and rear ends, and the lower surface of the front and rear moving plates is fixedly connected to a threaded sleeve through a connecting plate. A lead screw is fitted inside the threaded sleeve, and the two ends of the lead screw are rotatably connected to the upright plates near the two ends on the base. One of the upright plates is fixedly connected to an output shaft and a servo motor fixedly connected to one end of the lead screw.

[0009] Furthermore, both the slot and the insert plate are four-sided pyramidal structures with the small end facing upwards. The insert plate has a positioning hole in the middle, and an electromagnet is fixedly connected in the positioning hole. A magnetic chuck is embedded in the bottom of the slot.

[0010] Furthermore, a positioning cylinder is fixedly connected to the top of the exhaust hood, a transfer duct is fixedly connected to the top of the positioning cylinder, and an exhaust fan is fixedly connected inside the positioning cylinder.

[0011] Furthermore, a conduit for passing cables is fixedly connected to the top of the exhaust hood near one side.

[0012] Furthermore, an inspection window is provided on one side of the exhaust hood, and a door panel is hinged to one side of the inspection window.

[0013] Furthermore, clearance notches are provided on both sides of the placement groove.

[0014] The beneficial effects of this utility model are as follows: 1. In this utility model, by setting a front and rear movable plate, it is convenient for the two placement boxes carrying PCBA to be placed in the spot welding station in turn, so that one placement box can be freely picked up and put in the other placement box during the spot welding process, which greatly improves the efficiency of continuous PCBA processing.

[0015] 2. In this utility model, by setting an exhaust hood outside the spot welding station, the fumes generated by continuous spot welding can be discharged to the maximum extent, which greatly reduces the environmental pollution in the welding area.

[0016] 3. In this utility model, both the insert plate and the slot are four-sided pyramidal structures. An electromagnet is set on the insert plate, and a magnetic chuck is set at the bottom of the slot. This makes it easier and less labor-intensive to connect and separate the placement box and the front and rear movable plates. Moreover, the connection is more secure and ensures welding accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a spot welding device for PCBA processing according to the present invention; Figure 2 This is a schematic diagram of the insert plate of a spot welding device for PCBA processing according to the present invention; Figure 3 This is a schematic diagram of a servo motor, lead screw, and lead sleeve for a spot welding device used in PCBA processing according to this utility model. Figure 4 This is a schematic diagram of the slot of a spot welding device for PCBA processing according to the present invention; In the diagram: 1. Base; 11. Vertical plate; 2. Door-shaped fixing frame; 3. Left and right moving seat; 4. Electric cylinder; 5. Welding equipment; 6. Front and rear moving plate; 61. Threaded sleeve; 7. Insert plate; 71. Positioning hole; 8. Placement box; 81. Placement slot; 811. Clearance notch; 9. Slot; 101. Exhaust hood; 1011. Positioning cylinder; 10111. Adapter duct; 1012. Cable guide; 1013. Inspection window; 1014. Inlet / outlet notch; 102. Lead screw; 103. Servo motor one; 104. Electromagnet; 105. Magnetic chuck; 106. Exhaust fan; 107. Door panel. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1 to 1This utility model provides a technical solution: a spot welding device for PCBA processing, including a base 1 and a placement box 8. A portal frame 2 is provided above the base 1, and a left and right movable seat 3 is provided at the top of the portal frame 2. Specifically, a guide block is fixedly provided at the top of the left and right movable seat 3. A slide rail is opened at the top of the portal frame 2 and slidably connected to the guide block. The bottom of the left and right movable seat 3 is connected to an electric welding device 5 through an electric cylinder 4. The electric welding device 5 can be an existing device for spot welding PCBA boards. The electric cylinder 4 drives the electric welding device 5 to move up and down through program control. The left and right movable seat 3 is moved by a lead screw, and the rotation of the lead screw is driven by a servo motor. When the left and right movable seat 3 moves, it will drive the electric welding device 5 to move left and right. The placement box 8 is cuboid in shape. A row of placement slots 81 is opened on the top surface of the placement box 8. The outline of the placement slots 81 is adapted to the shape of the PCBA board, that is, the PCBA board will not make a clatter when placed in the placement slots 81. The placement box 8 acts as a positioning fixture. In use, clearance notches 811 can be provided on both sides of the placement slot 81. These clearance notches 811 facilitate manual or robotic insertion or removal of the PCBA board into or out of the placement slot 81.

[0020] In this embodiment, a front-to-back movable plate 6 is provided above the base 1 and located below the welding equipment 5. The front-to-back movable plate 6 and the base 1 are slidably connected by common slide rails and sliding sleeves. When the front-to-back movable plate 6 moves back and forth, it can switch between two positions: below and outside the welding equipment 5. Specifically, a vertical plate 11 near the front and rear ends is welded to the upper end surface of the base 1. A threaded sleeve 61 is fixedly connected to the lower end surface of the front-to-back movable plate 6 through a connecting plate. A lead screw 102 is fitted inside the threaded sleeve 61. The two ends of the lead screw 102 are rotatably connected to the vertical plates 11 near the two ends on the base 1. One side of one of the vertical plates 11 is fixedly connected to an output shaft and a servo motor 103 is fixedly connected to one end of the lead screw 102. The servo motor 103 provides driving force to the rotation of the lead screw 102. The lead screw 102 drives the front-to-back movable plate 6 to move back and forth by means of rotation. The upper end face of the front and rear moving plate 6 is fixedly connected with the insertion plates 7 near both ends. The bottom surface of the placement box 8 is provided with slots 9 for insertion of the insertion plates 7. In this embodiment, there are two insertion plates 7. Two placement boxes 8 can be placed on the front and rear moving plate 6. When the front and rear moving plate 6 moves back and forth, it will drive the two placement boxes 8 to take turns being below the welding equipment 5, that is, the spot welding station. When one placement box 8 is in the spot welding station, the other placement box 8 is in the loading and unloading station. This arrangement allows multiple PCBA boards placed on the loading and unloading placement boxes 8 to be continuously spot welded. Moreover, during the welding process, the loading and unloading operations of the placement boxes 8 can be performed at the loading and unloading station. Then, by controlling the front and rear moving plate 6 to move back and forth, spot welding processing can be performed on the PCBA boards in different placement boxes 8, which greatly improves the efficiency of spot welding processing.

[0021] Both slot 9 and insert plate 7 are four-sided pyramidal structures with the smaller end facing upwards. The taper of slot 9 and insert plate 7 is the same, making insertion easier and resulting in a better fit. Insert plate 7 has a positioning hole 71 in the middle, which is a through hole. An electromagnet 104 is fixedly connected inside the positioning hole 71. A magnetic chuck 105 is embedded in the bottom of slot 9. When the electromagnet 104 is energized, it generates a magnetic force that attracts the magnetic chuck 105. At this time, the placement box 8 on the front and rear moving plate 6 is locked. When the magnetic chuck 105 is de-energized, the magnetic force disappears, and the placement box 8 can be easily removed. This design ensures the positioning accuracy of the placement box 8 while providing convenient placement and removal. In use, the electromagnet 104 can be connected to a separate control box with a control button to achieve independent control of its energization and de-energization, or it can be connected to a programmable control module.

[0022] Furthermore, the top of the base 1 is fixedly connected to an exhaust hood 101 that covers the outside of the door-shaped fixing frame 2. The spot welding station is located inside the exhaust hood 101. The continuous welding of the electric welding equipment 5 will generate a large amount of accumulated smoke. The function of the exhaust hood 101 is to maximize the exhaust of the large amount of smoke generated by the continuous spot welding process and avoid smoke pollution of the processing environment. The exhaust hood 101 has inlet and outlet notches 1014 on both the front and rear sides. The function of these inlet and outlet notches 1014 is to provide a channel for the front and rear moving plate 6 to carry the placement box 8 in and out of the exhaust hood 101.

[0023] Specifically, a positioning cylinder 1011 is fixedly connected to the top of the exhaust hood 101, and a transfer duct 10111 is fixedly connected to the top of the positioning cylinder 1011. An exhaust fan 106 is fixedly connected inside the positioning cylinder 1011. After the exhaust fan 106 is started, it can transport the smoke inside the exhaust hood 101 to the transfer duct 10111. In use, the transfer duct 10111 is connected to an external ventilation and filtration system through a pipeline. The filtration here refers to a filtration device containing filter cotton and activated carbon components to achieve pollution-free emissions. The above-mentioned filtration device is existing technology, and its specific structure will not be described in detail in this application.

[0024] In this embodiment, a cable conduit 1012 is fixedly connected to the top of the exhaust hood 101 near one side. The cable conduit 1012 is a channel for cables to enter and exit the exhaust hood 101.

[0025] In this embodiment, an inspection window 1013 is provided on one side of the exhaust hood 101. The inspection window 1013 facilitates the inspection and maintenance of the components inside the exhaust hood 101 by maintenance personnel. A door panel 107 is hinged to one side of the inspection window 1013. Rotating the door panel 107 can realize the opening and closing control of the inspection window 1013. Common door lock structures can be installed on the door panel 107 and the inspection window 1013. After the door panel 107 is closed, the door panel 107 is locked by the door lock structure.

[0026] Working principle: Taking a single solder joint on a PCBA board as an example, before use, electromagnet 104, servo motor 103, servo motor 2, electric steel 4, and exhaust fan 106 are electrically connected to an external programmable control module. Then, relevant infrared sensors or limit switches can be set as needed. The infrared sensors or limit switches can be installed on the slide rail to determine the position of the front and rear moving plate 6. The specific installation method is existing technology and will not be described in detail in this application. The programmable control module is equipped with switching buttons, soldering buttons, and stop buttons to realize the program control of the operation of electromagnet 104, servo motor 103, servo motor 2, and exhaust fan 106. In use, pressing the switch button activates the servo motor 103, which controls the lead screw 102 to rotate. The forward and backward moving plate 6 moves, positioning one of its insert plates 7 outside the exhaust hood 101. Then, the placement box 8, with the pre-placed PCBA boards, is inserted into the insert plate 7 via the slot 9. Pressing the switch button again moves the forward and backward moving plate 6 into the spot welding station. Pressing the welding button activates the electric cylinder 4, which moves the welding equipment 5 up and down, while the left and right moving seat 3 moves left and right to spot weld each PCBA board in the placement box 8 in turn. The exhaust fan 106 starts to expel the welding fumes. Simultaneously, another unused insert plate 7 on the forward and backward moving plate 6 is located outside the exhaust hood 101. A placement box 8 can be placed at this position. It should be noted that, according to the program settings, the electromagnet 104 in the spot welding station is energized, while the electromagnet 104 in the loading / unloading station is de-energized.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spot welding device for PCBA processing, comprising a base (1) and a placement box (8), wherein a portal frame (2) is provided above the base (1), and a left-right movable seat (3) located at the top is provided inside the portal frame (2), and an electric welding device (5) is connected to the bottom of the left-right movable seat (3) via an electric cylinder (4), and a row of placement slots (81) is provided on the top surface of the placement box (8), characterized in that, Above the base (1) is a front and rear movable plate (6) located below the welding equipment (5). The upper end of the front and rear movable plate (6) is fixedly connected to the insert plate (7) near both ends. The bottom surface of the placement box (8) is provided with a slot (9) for inserting into the insert plate (7). The top of the base (1) is fixedly connected to an exhaust hood (101) covering the outside of the door-shaped fixing frame (2). The exhaust hood (101) is provided with inlet and outlet notches (1014) on both the front and rear sides.

2. The spot welding device for PCBA processing according to claim 1, characterized in that: The upper end face of the base (1) is welded with a vertical plate (11) near the front and rear ends. The lower end face of the front and rear moving plate (6) is fixedly connected with a threaded sleeve (61) through a connecting plate. A threaded rod (102) is fitted inside the threaded sleeve (61). The two ends of the threaded rod (102) are rotatably connected to the vertical plates (11) near the two ends on the base (1). One side of one of the vertical plates (11) is fixedly connected with an output shaft and a servo motor (103) fixedly connected to one end of the threaded rod (102).

3. The spot welding device for PCBA processing according to claim 1, characterized in that: Both the slot (9) and the insert plate (7) are quadrangular pyramid structures with the small end facing upwards. The insert plate (7) has a positioning hole (71) in the middle. An electromagnet (104) is fixedly connected in the positioning hole (71). A magnetic chuck (105) is embedded in the bottom of the slot (9).

4. The spot welding device for PCBA processing according to claim 1, characterized in that: The top of the exhaust hood (101) is fixedly connected to a positioning cylinder (1011), the top of the positioning cylinder (1011) is fixedly connected to a transfer duct (10111), and an exhaust fan (106) is fixedly connected inside the positioning cylinder (1011).

5. The spot welding device for PCBA processing according to claim 1, characterized in that: The top of the exhaust hood (101) is fixedly connected to a conduit (1012) near one side.

6. The spot welding device for PCBA processing according to claim 1, characterized in that: The exhaust hood (101) has an inspection window (1013) on one side, and a door panel (107) is hinged to one side inside the inspection window (1013).

7. A spot welding device for PCBA processing according to claim 1, characterized in that: The placement slot (81) has clearance notches (811) on both sides.

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