A special jig for trimming PCBA pins

Abstract

The utility model relates to the technical field of pin finishing, and disclose a kind of jig special for PCBA pin finishing, including workbench, the upper surface of workbench is equipped with position adjusting assembly, the side of position adjusting assembly is provided with cross arm, the inside of cross arm is equipped with guide slot, the inside of guide slot is slidably installed with several groups of sliders, the lower end of each slider is fixedly installed with finishing part, and the slider is provided with fastener for connecting cross arm;The upper surface of workbench is equipped with working stand, and the working stand is provided with electronic component;According to pin spacing, slider is slid along the guide slot of cross arm to target position, and threaded rod is locked slider by screw sleeve, so that each finishing part is accurately aligned with corresponding pin, the spacing of different models, batch appliance component pin can be adjusted, and the application range of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of pin trimming technology, specifically a special fixture for PCBA pin trimming. Background Technology

[0002] PCBA is a core component of electronic devices, consisting of a printed circuit board (PCB) and electronic components soldered onto it. The core purpose of PCBA pin trimming is to balance product appearance and soldering quality: for small components, trimmed pins can optimize soldering results, especially in automated soldering scenarios, effectively preventing components from falling off, avoiding cold solder joints, reducing subsequent solder joint trimming processes, and improving the heat dissipation performance of components.

[0003] Electronic components need to be transported to the soldering workshop before assembly. During transportation or movement, vibration and collisions can easily cause pins to tilt or bend, affecting the alignment accuracy and installation efficiency of subsequent assembly. Furthermore, due to differences in the number and spacing of pins among different batches and models of electronic components, a single trimming fixture cannot be universally used, necessitating frequent fixture changes. Therefore, we propose a dedicated PCBA pin trimming fixture. Utility Model Content

[0004] The purpose of this invention is to provide a special fixture for PCBA pin trimming to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a special fixture for PCBA pin trimming, comprising a worktable, a position adjustment component mounted on the upper surface of the worktable, a cross arm provided on one side of the position adjustment component, a guide groove provided inside the cross arm, a plurality of sliding parts slidably mounted inside the guide groove, a trimming part fixedly mounted at the lower end of each sliding part, and fasteners for connecting the cross arm provided on the sliding parts; a work frame mounted on the upper surface of the worktable, and electronic components mounted on the work frame.

[0006] Preferably, the trimming part has a trimming channel inside, and the lower opening of the trimming channel is a V-shaped groove.

[0007] Preferably, the fastener includes a threaded sleeve mounted on the outer wall of the sliding member via a plate, and the threaded sleeve has a threaded rod internally connected to it.

[0008] Preferably, one end of the guide groove is configured as an opening.

[0009] Preferably, the position adjustment assembly includes an electric guide rail mounted on the upper surface of the worktable, a mounting frame fixedly mounted on the upper surface of the moving end of the electric guide rail, an electric push rod installed inside the mounting frame, a lifting frame fixedly mounted on the output end of the electric push rod, and the lifting frame fixedly connected to the cross arm.

[0010] Preferably, a turntable is rotatably mounted at the center of the upper surface of the work frame, a motor for driving the turntable to rotate is installed inside the work frame, a suction cup is provided on the upper surface of the turntable, and the suction cup is connected to a negative pressure pump through a pipe.

[0011] Preferably, the upper surface of the work frame is provided with sliding grooves on both sides of the turntable, and a clamp is slidably installed inside the sliding groove. An electric push rod for driving the clamp is installed inside the work frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When the position adjustment component drives the horizontal arm to descend, the pins of the electronic components enter the trimming channel along the inverted V-shaped groove. During trimming, the position adjustment component can move the trimming part away from the electronic components. Through the relative movement between the trimming channel and the pin part, the pins are straightened.

[0013] Based on the pin spacing, the slider is slid along the guide groove of the cross arm to the target position. The threaded rod is tightened to lock the slider through the threaded sleeve, so that each trimming part is precisely aligned with the corresponding pin. The spacing of the pins of different models and batches of electrical components can be adjusted to improve the applicability of the equipment. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a special fixture for PCBA pin trimming provided by this utility model; Figure 2 A schematic diagram of the mounting bracket structure provided by this utility model; Figure 3 A schematic diagram of the crossarm structure provided by this utility model; Figure 4 Provided by this utility model Figure 3 Enlarged structural diagram at point a; Figure 5 A schematic diagram of the work frame structure provided for this utility model.

[0015] In the diagram: 1. Workbench; 2. Position adjustment assembly; 21. Lifting frame; 22. Electric actuator; 23. Mounting bracket; 24. Electric guide rail; 3. Cross arm; 31. Guide groove; 32. Sliding component; 33. Trimming section; 331. Trimming channel; 332. V-groove; 34. Threaded sleeve; 35. Threaded rod; 4. Work frame; 41. Turntable; 42. Suction cup; 43. Slide groove; 44. Clamp; 5. Electronic components. Detailed Implementation

[0016] 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 protection scope of the present utility model.

[0017] Please see Figures 1-5 As shown, a special fixture for PCBA pin trimming includes a workbench 1. A position adjustment component 2 is mounted on the upper surface of the workbench 1. A cross arm 3 is provided on one side of the position adjustment component 2. A guide groove 31 is provided inside the cross arm 3. Several sets of sliding parts 32 are slidably installed inside the guide groove 31. A trimming part 33 is fixedly installed at the lower end of each sliding part 32. Fasteners for connecting the cross arm 3 are provided on the sliding part 32. A work frame 4 is mounted on the upper surface of the workbench 1. Electronic components 5 are provided on the work frame 4.

[0018] When the position adjustment component 2 lowers the horizontal arm 3, the pin of the electronic component 5 enters the trimming channel 331 along the inverted V-groove 332. During trimming, the position adjustment component 2 can move the trimming part 33 away from the electronic component 5. Through the relative movement between the trimming channel 331 and the pin, the pin is straightened. According to the pin spacing, the slider 32 is slid along the guide groove 31 of the cross arm 3 to the target position, and the threaded rod 35 is tightened to lock the slider 32 through the threaded sleeve 34, so that each trimming part 33 is precisely aligned with the corresponding pin. The spacing of the pins of different models and batches of electrical components can be adjusted to improve the applicability of the equipment.

[0019] Dual fixing design: The suction cup 42 adsorption and the clamping on both sides combine to ensure that the PCBA does not shift during the trimming process and improve trimming accuracy; Multi-dimensional adjustment system: The position adjustment component realizes horizontal and vertical adjustment, and the slider 32 realizes fine adjustment of the spacing of the trimming part 33, adapting to the trimming needs of different PCBA pin specifications; High-efficiency trimming structure: The inverted V-groove 332 combines cutting and shaping functions, completing pin trimming and cutting in one operation, improving work efficiency.

[0020] In this embodiment, the trimming part 33 is provided with a trimming channel 331 inside, and the lower opening of the trimming channel 331 is provided with an inverted V-shaped groove 332.

[0021] The end of the trimming channel 331 away from the electronic component 5 is set in a V-shape, which allows the bent part of the pin of the electronic component 5 to enter the trimming channel 331 without obstruction through the V-shaped end of the trimming channel 331, thus avoiding bending the pin during displacement.

[0022] When the position adjustment component 2 drives the horizontal arm 3 to descend, the pin of the electronic component 5 enters the trimming channel 331 along the inverted V-shaped groove 332. During trimming, the position adjustment component 2 can move the trimming part 33 away from the electronic component 5. By moving relative to the pin part through the trimming channel 331, the pin is straightened.

[0023] In this embodiment, the fastener includes a threaded sleeve 34 mounted on the outer wall of the slider 32 via a plate, and a threaded rod 35 is threadedly connected inside the threaded sleeve 34. The guide groove 31 inside the cross arm 3 provides a sliding track for the slider 32. Since one end of the guide groove 31 is open, several sets of sliders 32 can be inserted into the guide groove 31 from the open end and slide along the groove according to the spacing requirements of the PCBA pins, so that the trimming part 33 at the lower end of each slider 32 corresponds one-to-one with the pin to be trimmed. After the position is adjusted, it is fixed by the fastener composed of the threaded sleeve 34 and the threaded rod 35 on the outer wall plate of the slider 32 - tighten the threaded rod 35 so that its end presses against the outer wall of the slider 32, and lock the position of the slider 32 by friction, so as to prevent the slider 32 from shifting during the trimming process.

[0024] In this embodiment, one end of the guide groove 31 is set as an opening, which can increase or decrease the number of trimming parts 33 to adapt to electrical components with different signals.

[0025] In this embodiment, the position adjustment component 2 includes an electric guide rail 24 mounted on the upper surface of the worktable 1. A mounting frame 23 is fixedly mounted on the upper surface of the moving end of the electric guide rail 24. An electric push rod 22 is installed inside the mounting frame 23. A lifting frame 21 is fixedly mounted on the output end of the electric push rod 22. The lifting frame 21 is fixedly connected to the cross arm 3.

[0026] The position adjustment component 2 achieves three-dimensional spatial position adjustment of the horizontal arm 3 and the trimming part 33 through the coordinated action of the electric guide rail 24 and the electric push rod 22. Specifically, the moving end of the electric guide rail 24 drives the mounting frame 23 to slide horizontally along the length of the worktable 1, thereby adjusting the horizontal position of the trimming part 33. The electric push rod 22 inside the mounting frame 23 drives the lifting frame 21 to move up and down, which in turn drives the horizontal arm 3, which is fixedly connected to it, to move up and down synchronously, thereby adjusting the vertical height of the trimming part 33. Through the combined adjustment of the horizontal and vertical directions, the trimming part 33 can be precisely moved to the trimming position directly above the PCBA pins.

[0027] In this embodiment, a turntable 41 is rotatably mounted on the center of the upper surface of the work frame 4. A motor for driving the turntable 41 to rotate is installed inside the work frame 4. A suction cup 42 is provided on the upper surface of the turntable 41. The suction cup 42 is connected to a negative pressure pump through a pipe.

[0028] The upper surface of the work frame 4 is provided with slide grooves 43 on both sides of the turntable 41. A clamp 44 is slidably installed inside the slide groove 43. An electric push rod for driving the clamp 44 is installed inside the work frame 4.

[0029] First, place the PCBA to be repaired on the turntable 41 of the work rack 4, start the negative pressure pump connected to the suction cup 42, and the suction cup 42 forms a negative pressure adsorption force through the pipe to initially fix the bottom of the PCBA; then, the electric push rod inside the work rack 4 drives the clamps 44 in the sliding grooves 43 on both sides to slide along the sliding grooves 43, clamping and limiting the PCBA from both sides, forming a dual fixing mode of "bottom adsorption + side clamping" to prevent the PCBA from shifting during the repair process.

[0030] When it is necessary to trim the pins in different positions of the PCBA, the motor inside the work stand 4 drives the turntable 41 to rotate, causing the PCBA to rotate synchronously to the target angle. Multi-position trimming can be completed without disassembling and reinstalling the PCBA, thus improving work efficiency.

[0031] Working principle: Preparation stage: Place the PCBA to be repaired on the turntable 41 of the work rack 4, start the negative pressure pump to make the suction cup 42 adsorb the bottom of the PCBA, and at the same time, the electric push rod drives the clamp 44 to slide along the slide groove 43 to clamp and fix the PCBA from both sides.

[0032] Adjustment of the spacing between trimming parts 33: According to the spacing between PCBA pins, slide the slider 32 along the guide groove 31 of the cross arm 3 to the target position, tighten the threaded rod 35 to lock the slider 32 through the threaded sleeve 34, so that each trimming part 33 is precisely aligned with the corresponding pin.

[0033] Precise trimming execution: Activate position adjustment component 2, the electric guide rail 24 drives the mounting bracket 23 to move horizontally, and move the horizontal arm 3 to directly above the PCBA pins; then the electric push rod 22 drives the lifting frame 21 to descend, and drives the trimming part 33 to descend synchronously. The pins of the electronic component 5 enter the trimming channel 331 along the inverted V-shaped groove 332. During trimming, the position adjustment component 2 can make the trimming part 33 move away from the electronic component 5. Through the relative movement between the trimming channel 331 and the pin part, the pins are straightened.

[0034] Multi-directional trimming options: If the PCBA needs multi-directional trimming, the internal motor of the work stand 4 drives the turntable 41 to rotate, causing the PCBA to rotate to the target angle. Repeating steps 2-3 will complete the trimming of pins in different directions.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] 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 special fixture for PCBA pin trimming, comprising a workbench (1), characterized in that, The workbench (1) is equipped with a position adjustment component (2) on its upper surface. A cross arm (3) is provided on one side of the position adjustment component (2). A guide groove (31) is provided inside the cross arm (3). Several sets of sliding parts (32) are slidably installed inside the guide groove (31). A trimming part (33) is fixedly installed at the lower end of each sliding part (32). Fasteners for connecting the cross arm (3) are provided on the sliding part (32). A work frame (4) is installed on the upper surface of the workbench (1). Electronic components (5) are provided on the work frame (4).

2. The PCBA pin trimming special fixture according to claim 1, characterized in that: The trimming part (33) has a trimming channel (331) inside, and the lower opening of the trimming channel (331) is set as an inverted V-shaped groove (332).

3. The PCBA pin trimming special fixture of claim 2, wherein: The fastener includes a threaded sleeve (34) mounted on the outer wall of the slide (32) via a plate, and the threaded sleeve (34) is internally threaded with a threaded rod (35).

4. The PCBA pin trimming special fixture of claim 1, wherein: One end of the guide groove (31) is set as an opening.

5. The PCBA pin trimming special fixture of claim 1, wherein: The position adjustment component (2) includes an electric guide rail (24) mounted on the upper surface of the workbench (1). A mounting frame (23) is fixedly mounted on the upper surface of the moving end of the electric guide rail (24). An electric push rod (22) is installed inside the mounting frame (23). A lifting frame (21) is fixedly mounted on the output end of the electric push rod (22). The lifting frame (21) is fixedly connected to the cross arm (3).

6. A special fixture for PCBA pin trimming according to claim 1, characterized in that: A turntable (41) is rotatably mounted on the center of the upper surface of the work frame (4). A motor for driving the turntable (41) to rotate is installed inside the work frame (4). A suction cup (42) is provided on the upper surface of the turntable (41). The suction cup (42) is connected to a negative pressure pump through a pipe.

7. A special fixture for PCBA pin trimming according to claim 6, characterized in that: The upper surface of the work frame (4) is provided with sliding grooves (43) on both sides of the turntable (41). A clamp (44) is slidably installed inside the sliding groove (43). An electric push rod for driving the clamp (44) is installed inside the work frame (4).

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