Positioning jig for PCB tin spraying

Abstract

The utility model discloses a positioning jig for PCB (printed circuit board) tin spraying, which relates to the technical field of PCB tin spraying and comprises a sliding plate. Connecting frames are connected to the two ends of the sliding plate, a sliding frame is connected to the sliding plate in a sliding mode, an adjusting mechanism is arranged between the sliding frame and the connecting frame on one side, a limiting mechanism is arranged in the sliding frame and comprises a double-thread screw and a fixing rod, the double-thread screw is arranged at the bottom in the sliding frame, and the fixing rod is arranged in the sliding frame. The two ends of the double-thread screw are connected with fixed bearings. According to the utility model, the PCB can be ensured to be accurately aligned with a nozzle or other processing equipment through transverse and vertical limiting before tin spraying, the processing precision is improved, the position of a bonding pad or an element is ensured to be correct, alignment errors possibly occurring in the operation process are reduced through physical limiting, variables caused by human factors are reduced, and the production efficiency is improved in large-scale production. And each PCB is ensured to be placed according to the same positioning, so that the consistency and repeatability of the whole product can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board tin spraying, in particular to a positioning fixture for PCB tin spraying. Background Art

[0002] The positioning fixture for PCB tin spraying is a device used to fix and position the PCB during the tin spraying process of the printed circuit board (PCB). This fixture needs to ensure that the PCB is accurately aligned during the tin spraying process so that the tin can be accurately sprayed onto the specified pads. The fixture needs to cooperate with features such as positioning holes or edges on the PCB to ensure accurate alignment. This fixture is particularly critical in the automated production line of PCB manufacturing. It can significantly improve production efficiency, reduce human errors, and ensure quality and consistency in the welding process;

[0003] The Chinese patent authorization announcement number is CN215872052U, and the name is a PCB board tin spraying device, which includes a working box, an inlet is opened on the front side of the working box, an outlet is opened on the rear side, and a conveyor belt and a conveyor roller are arranged in sequence from front to back inside the working box; it has the following beneficial effects: the PCB board can be automatically placed into the tin spraying machine through a mechanical arm, and the edge of the PCB board can be protected during the clamping process, and accurate positioning can be achieved in subsequent processing;

[0004] The shortcomings of the above-mentioned prior art solutions are: although the above-mentioned solution can clamp the PCB board by a mechanical arm, the device in the prior art cannot adapt to PCB boards of various sizes, which limits the flexibility of the production line and the ability to adapt to different product requirements. As time goes by, the mechanical equipment may wear out, and the device in the prior art cannot be adjusted, so it is impossible to compensate for the decrease in accuracy caused by such wear, which may affect the technical problem of the accuracy of tin spraying. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning fixture for PCB tin spraying, so as to solve the technical problems that the device in the prior art cannot adapt to PCB boards of various sizes, which limits the flexibility of the production line and the ability to adapt to different product requirements, and the device in the prior art cannot be adjusted and cannot compensate for the decrease in accuracy caused by wear, which may affect the accuracy of tin spraying.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] A positioning fixture for PCB tin spraying, comprising a slide plate;

[0008] Both ends of the slide are connected to connecting frames, a slide is slidably connected to the slide, and an adjustment mechanism is provided between the slide and one side of the connecting frame;

[0009] A limiting mechanism is provided inside the slide, and the limiting mechanism includes a double-headed screw and a fixed rod. The double-headed screw is arranged at the bottom of the slide, and fixed bearings are connected at both ends of the double-headed screw. Slide blocks are connected to the two fixed bearings. A sliding groove is provided on the slide, and the slide block can slide in the sliding groove. The end of the slide block away from the fixed bearing is connected to a limiting plate, and a through hole is provided on the limiting plate. The fixing rod is detachably connected to the through hole on the limiting plate, and a through hole is provided at one end of the fixing rod, and a positioning rod is inserted in the through hole.

[0010] As a further solution of the utility model: the adjusting mechanism includes an adjusting rod and a plug-in rod, the connecting frame is provided with a through hole, the adjusting rod is plugged into the through hole, the adjusting rod is connected to one side of the slide, the adjusting rod is provided with multiple through holes, and the plug-in rod is plugged into the through hole of the adjusting rod.

[0011] As a further solution of the utility model: a handle is provided at one end of the adjusting rod away from the sliding bracket.

[0012] As a further solution of the utility model: one end of the plug-in rod is connected to a limiting head, and the diameter of the limiting head is larger than the diameter of the through hole of the adjusting rod.

[0013] As a further solution of the utility model: the limiting plate is made of soft material.

[0014] As a further solution of the utility model: one end of the positioning rod is connected to a rubber head.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model can ensure that the PCB board is accurately aligned with the nozzle or other processing equipment before tin spraying through horizontal and vertical limit, improve the processing accuracy, ensure the correct position of the pad or component, reduce the possible alignment error during the operation through physical limit, reduce the variables caused by human factors, and ensure that each PCB board is placed in the same position in large-scale production, which can significantly improve the consistency and repeatability of the overall product;

[0017] 2. The utility model adjusts the position of the slide through an adjustment mechanism on one side. First, the plug-in rod is pulled out, and the adjustment rod is pulled to move the slide on the slide. The fixture can be adapted to PCB boards of various sizes by adjusting the fixture. Rapid changeover can be achieved through simple adjustment, thereby enhancing the flexibility of the production line. The horizontal and vertical limiters can quickly position the PCB board, reducing the time for manual adjustment of the board, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 3 yes Figure 1 Enlarged structural diagram at B in the middle.

[0022] In the figure: 1. slide plate; 2. slide frame; 3. slide groove; 4. double-headed screw; 5. adjustment rod; 6. fixed bearing; 7. slide block; 8. limit plate; 9. fixed rod; 10. positioning rod; 11. rubber head; 12. connecting frame; 13. plug-in rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1-Figure 3 As shown, a positioning fixture for PCB tin spraying includes a slide plate 1, both ends of the slide plate 1 are connected to a connecting frame 12, a slide plate 2 is slidably connected to the slide plate 1, and an adjustment mechanism is provided between the slide plate 2 and the connecting frame 12 on one side;

[0025] The adjusting mechanism comprises an adjusting rod 5 and a plug-in rod 13. A through hole is provided on the connecting frame 12. The adjusting rod 5 is plugged into the through hole. The adjusting rod 5 is connected to one side of the slide 2. A handle is provided at one end of the adjusting rod 5 away from the slide 2. A plurality of through holes are provided on the adjusting rod 5. The plug-in rod 13 is plugged into the through hole of the adjusting rod 5. One end of the plug-in rod 13 is connected to a limit head. The diameter of the limit head is larger than the diameter of the through hole of the adjusting rod 5.

[0026] A limiting mechanism is provided inside the slide 2, and the limiting mechanism includes a double-headed screw 4 and a fixed rod 9. The double-headed screw 4 is arranged at the bottom of the slide 2, and fixed bearings 6 are connected to both ends of the double-headed screw 4. Slide blocks 7 are connected to the two fixed bearings 6. A sliding groove 3 is provided on the slide 2, and the slide block 7 can slide in the sliding groove 3. The end of the slide block 7 away from the fixed bearing 6 is connected to a limiting plate 8, and the limiting plate 8 is made of soft material. A through hole is provided on the limiting plate 8, and the fixed rod 9 is detachably connected to the through hole on the limiting plate 8. A through hole is provided at one end of the fixed rod 9, and a positioning rod 10 is inserted in the through hole. A rubber head 11 is connected to one end of the positioning rod 10.

[0027] The working principle of the utility model is as follows: when using the device, the position of the slide 2 is adjusted through the adjustment mechanism on one side, the plug-in rod 13 is first pulled out, and the adjustment rod 5 is pulled to make the slide 2 move on the slide plate 1. When it moves to the appropriate position, the plug-in rod 13 is re-inserted into the corresponding through hole of the adjustment rod 5 to fix the slide 2; then the PCB board is placed inside the slide 2, the limiting mechanism inside the slide 2 is adjusted, and the double-headed screw 4 is adjusted. The double-headed screw 4 drives the fixed bearings 6 at both ends to move toward or relatively. In this process, the fixed bearing 6 drives the slider 7 to slide in the sliding groove 3, and the slider 7 drives the limiting plate 8 to move. The position of the limiting plate 8 is moved according to the size of the PCB board, so that the limiting plate 8 can limit the PCB board. After the horizontal position of the PCB board is fixed, the fixing rod 9 is inserted into the through hole on the limiting plate 8, and then the positioning rod 10 is inserted through the through hole on the fixing rod 9. The rubber head 11 on the positioning rod 10 is aligned with the PCB board, and the PCB board is vertically limited by the positioning rod 10;

[0028] Through the horizontal and vertical limit, the PCB board can be accurately aligned with the nozzle or other processing equipment before tin spraying, so as to improve the processing accuracy and ensure the correct position of the pad or component. Through physical limit, the possible alignment error during operation can be reduced, and the variables caused by human factors can be reduced. In large-scale production, it can ensure that each PCB board is placed in the same position, which can significantly improve the consistency and repeatability of the overall product. By adjusting the same fixture, it can adapt to PCB boards of various sizes, and achieve rapid changeover through simple adjustment, which enhances the flexibility of the production line. The horizontal and vertical limit can quickly locate the PCB board, reduce the time of manual adjustment of the board, and thus improve production efficiency.

[0029] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A positioning fixture for PCB tin spraying, comprising a slide plate (1); characterized in that: Both ends of the slide plate (1) are connected to connecting frames (12), a slide frame (2) is slidably connected to the slide plate (1), and an adjustment mechanism is provided between the slide frame (2) and one side connecting frame (12); A limiting mechanism is provided inside the slide (2), and the limiting mechanism comprises a double-headed screw (4) and a fixed rod (9). The double-headed screw (4) is arranged at the bottom of the slide (2). Both ends of the double-headed screw (4) are connected to fixed bearings (6). Both fixed bearings (6) are connected to sliders (7). The slide (2) is provided with a sliding groove (3). The slider (7) can slide in the sliding groove (3). The end of the slider (7) away from the fixed bearing (6) is connected to a limiting plate (8). The limiting plate (8) is provided with a through hole. The fixed rod (9) can be detachably connected to the through hole on the limiting plate (8). One end of the fixed rod (9) is provided with a through hole, and a positioning rod (10) is inserted into the through hole.

2. A positioning fixture for PCB tin spraying according to claim 1, characterized in that: The adjusting mechanism comprises an adjusting rod (5) and a plug-in rod (13); a through hole is provided on the connecting frame (12); the adjusting rod (5) is plugged into the through hole; the adjusting rod (5) is connected to one side of the sliding frame (2); a plurality of through holes are provided on the adjusting rod (5); and the plug-in rod (13) is plugged into the through hole of the adjusting rod (5).

3. A positioning fixture for PCB tin spraying according to claim 2, characterized in that: A handle is provided at one end of the adjusting rod (5) away from the sliding bracket (2).

4. A positioning fixture for PCB tin spraying according to claim 2, characterized in that: One end of the plug-in rod (13) is connected to a limit head, and the diameter of the limit head is larger than the diameter of the through hole of the adjustment rod (5).

5. A positioning fixture for PCB tin spraying according to claim 1, characterized in that: The limiting plate (8) is made of soft material.

6. A positioning fixture for PCB tin spraying according to claim 1, characterized in that: One end of the positioning rod (10) is connected to a rubber head (11).

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