QFP component pin gold removing and tin coating device

Abstract

The utility model discloses a QFP type component pin gold removing and tin coating device which comprises a working table, a gold removing station, a tin coating station and a preheating table are arranged on the surface of the working table, a right-angle plate is arranged at the bottom of the working table, a circular groove is formed in the surface of the working table, a disc is arranged in the circular groove, and the right-angle plate is arranged on the surface of the working table. And a rotating shaft is arranged on the surface of the right-angle plate. According to the gold removing and tin coating device for the pins of the QFP type components, by arranging a servo motor, a limiting column, a connecting column, a handle, a pull rod, a spring and a clamping block, when a material disc is replaced, the connecting column with the material disc is inserted into the limiting column, after the clamping block clamps the connecting column by pulling the handle, the material disc is clamped into the connecting column, and the material disc is stably placed on the connecting column; therefore, a plurality of material trays can be conveniently installed on the equipment, when the components are replaced, people do not need to continuously turn off the equipment to replace the material trays of different components, the working time is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of removing gold and tinning from pins of components, in particular to a device for removing gold and tinning from pins of QFP components. Background Art

[0002] In the field of ultra-high reliability products such as aviation, aerospace, and navigation, the gold removal tin plating process is used to remove the gold plating on the pins of electronic components and replace it with a new tin-lead alloy plating. One reason why gold is not desired in solder joints is that although gold is widely used in the electronics industry due to its good chemical stability, non-oxidation, wear resistance, good conductivity, and low contact resistance. In the process of welding metal components, Au-Sn intermetallic compounds will be formed in the solder joints, and its Vickers hardness is as high as 750, showing obvious brittleness. The presence of this compound will cause a significant decrease in the mechanical properties of the solder joints, seriously affecting the reliability of electrical connections. In the tin plating process, these devices are immersed in solder liquid to wash off the gold, and then re-tin plating to form a new tin / lead surface. The second is the oxidation of the pins caused by long storage time or improper storage of the components, resulting in a decrease in the solderability of the pins. The tin plating process can improve the solderability of the pins; the third is the conversion of the lead-free / lead pin surface plating to ensure that the plating on the component pins is consistent with the solder paste and solder wire to ensure the welding quality.

[0003] At present, there is only one material tray for holding components on the gold removal and tin plating equipment, and multiple components cannot be placed. After processing a batch of components, the operator needs to constantly shut down the equipment to replace other components, which wastes working time and reduces work efficiency. Therefore, a QFP component pin gold removal and tin plating device is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a device for removing gold and tinning pins of QFP components to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for removing gold and tinning pins of QFP components, comprising a workbench, the surface of which is respectively provided with a gold removal station, a tinning station and a preheating station, a right-angle plate is provided at the bottom of the workbench, a circular groove is provided on the surface of the workbench, a circular disc is provided inside the circular groove, a rotating shaft is provided on the surface of the right-angle plate, and one end of the rotating shaft extends and passes through the bottom surface of the workbench and is rotatably connected to the bottom of the circular disc, a servo motor is provided on the surface of the right-angle plate, an output end of the servo motor is rotatably connected to a rotating rod, a driving gear is provided on the outer surface of the rotating rod, a driven gear is provided on the outer surface of the rotating shaft, a chain meshing with the driving gear and the driven gear is provided on the outer surfaces, a limiting block is provided on the surface of the circular disc, a limiting column is provided on the surface of the limiting block, and A circular ring is provided on the outer surface of the limiting column, a limiting plate is provided on the surface of the circular ring, a pull rod is provided on the side of the limiting plate, and one end of the pull rod passes through the left side of the limiting plate and extends to the left side of the limiting plate, a handle is provided on the right end of the pull rod, a clamping block is provided on the left end of the pull rod, a spring is provided between the clamping block and the limiting plate, and the spring is sleeved on the outer surface of the pull rod, a connecting column is provided inside the limiting column, a material tray is clamped on the surface of the connecting column, a slide groove is provided on the surface of the workbench, a stepper motor is provided on the side of the workbench, a threaded rod is provided on the output end of the stepper motor, and one end of the threaded rod passes through the right side of the workbench and is rotatably connected to the left side wall of the slide groove, a slider is provided on the outer surface of the threaded rod, a connecting plate is provided on the surface of the slider, and a mechanical arm is provided on the surface of the connecting plate.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Preferably, the number of the limiting columns and the connecting columns is four, the four limiting columns and the connecting columns are arranged at equal distances in a circle, and the surfaces of the four connecting columns are all clamped with material trays. By providing the connecting columns, the limiting columns drive the connecting columns, and the material trays are clamped on the connecting columns, so that the connecting columns drive the material trays to move. When components need to be replaced, the material tray can be controlled to move to the operator, and then the material tray can be taken out from the connecting columns, so that the operator does not need to walk around to replace components.

[0008] Preferably, a hole matching the size of the connecting column is provided inside the limiting column. By providing the limiting column and the hole matching the size of the connecting column on the limiting column, the connecting column and the limiting column are easily plugged together.

[0009] Preferably, the number of the clamping blocks and the limiting plates is eight, two of the clamping blocks and the limiting plates form a group, and four groups of the clamping blocks and the limiting plates are arranged at equal distances in a circle. By providing the clamping blocks, when the connecting column is plugged into the limiting column, the clamping blocks can clamp both sides of the connecting column to prevent it from shaking, thereby preventing the material tray from falling and causing damage to components.

[0010] Preferably, there are four handles, which are equidistantly arranged around the circumference. By providing the handles, when it is necessary to replace material trays of different sizes, the handles can be pulled to allow the clamping block to loosen the connecting column, so that the connecting column can be removed from the limiting column, thereby facilitating the replacement of the connecting column to adapt to material trays of different sizes.

[0011] Preferably, a protective net is provided on the preheating table, and the protective net is provided to prevent the components from falling when the components are heated by hot air, thereby preventing the components from being damaged.

[0012] Beneficial Effects

[0013] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects: the QFP component pin de-golding and tinning device is provided with a servo motor, a limit column, a connecting column, a handle, a pull rod, a spring and a clamping block. When replacing the material tray, the connecting column with the material tray is inserted into the limit column, and then the handle is pulled to clamp the connecting column with the clamping block, and the material tray is clamped into the connecting column, so that the material tray is stably placed on the connecting column, thereby making the device easy to install multiple material trays. When replacing components, people do not need to constantly shut down the device to replace the material trays of different components, which saves working time and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0016] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0017] Figure 4 This is a left-side structural schematic diagram of the utility model;

[0018] Figure 5 It is a right-side sectional structural schematic diagram of the utility model.

[0019] In the figure: 1. workbench; 2. metal removal station; 3. tinning station; 4. preheating table; 5. right-angle plate; 6. rotating shaft; 7. circular groove; 8. disc; 9. servo motor; 10. rotating rod; 11. driving gear; 12. driven gear; 13. chain; 14. limit block; 15. limit column; 16. circular ring; 17. limit plate; 18. pull rod; 19. handle; 20. clamp block; 21. spring; 22. connecting column; 23. material tray; 24. slide; 25. stepping motor; 26. threaded rod; 27. slider; 28. connecting plate; 29. ​​robotic arm. DETAILED DESCRIPTION

[0020] 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 in 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.

[0021] See also Figure 1-5 The utility model provides a technical solution: a device for removing gold and tinning pins of QFP components, comprising a workbench 1, on the surface of the workbench 1 are respectively provided with a gold removal station 2, a tinning station 3 and a preheating station 4, a protective net is provided on the preheating station 4, and the protective net is provided to prevent the components from falling when the components are heated by hot air, thereby damaging the components, a right-angle plate 5 is provided at the bottom of the workbench 1, a circular groove 7 is opened on the surface of the workbench 1, a circular disc 8 is provided inside the circular groove 7, a rotating shaft 6 is provided on the surface of the right-angle plate 5, and one end of the rotating shaft 6 extends and passes through the bottom surface of the workbench 1 and is rotatably connected to the bottom of the circular disc 8.

[0022] A servo motor 9 is provided on the surface of the right-angle plate 5, and the output end of the servo motor 9 is rotatably connected to a rotating rod 10. A driving gear 11 is provided on the outer surface of the rotating rod 10, and a driven gear 12 is provided on the outer surface of the rotating shaft 6. Chains 13 meshing therewith are provided on the outer surfaces of the driving gear 11 and the driven gear 12. A limiting block 14 is provided on the surface of the disc 8, and a limiting column 15 is provided on the surface of the limiting block 14. There are four limiting columns 15 and connecting columns 22. The four limiting columns 15 and the connecting columns 22 are arranged at equal distances from each other on the circumference, and the surfaces of the four connecting columns 22 are all clamped with material trays 23. By providing the connecting columns 22, the limiting columns 15 drive the connecting columns 22, and the connecting columns 22 are clamped with the material tray 23, so that the connecting columns 22 drive the material tray 23 to move. When components need to be replaced, the material tray 23 can be controlled to be transferred to the operator, and then the material tray 23 can be taken out on the connecting columns 22, so that the operator does not need to walk around to replace components.

[0023] A circular ring 16 is provided on the outer surface of the limiting column 15, and a limiting plate 17 is provided on the surface of the circular ring 16. A pull rod 18 is provided on the side of the limiting plate 17, and one end of the pull rod 18 passes through the left side of the limiting plate 17 and extends to the left side of the limiting plate 17. A handle 19 is provided on the right end of the pull rod 18. There are four handles 19, and the four handles 19 are arranged at equal distances around the circumference. By providing the handle 19, when it is necessary to replace the material tray 23 of different sizes, the handle 19 can be pulled to make the clamp 20 loosen the connecting column 22, and the connecting column 22 can be removed from the limiting column 15, so that the connecting column 22 can be replaced conveniently to adapt to the material trays 23 of different sizes.

[0024] A clamping block 20 is provided at the left end of the pull rod 18. The number of the clamping blocks 20 and the limit plate 17 is eight. Two clamping blocks 20 and the limit plate 17 form a group. Four groups of clamping blocks 20 and the limit plate 17 are arranged at equal distances in a circle. By providing the clamping block 20, when the connecting column 22 is plugged into the limit column 15, the clamping block 20 can clamp both sides of the connecting column 22 to prevent it from shaking, thereby preventing the material tray 23 from falling and causing damage to components. A spring 21 is provided between the clamping block 20 and the limit plate 17, and the spring 21 is sleeved on the outer surface of the pull rod 18, and a connecting column 22 is provided inside the limit column 15.

[0025] The interior of the limiting column 15 is provided with a hole that is adapted to the size of the connecting column 22. By providing the limiting column 15 and the hole that is adapted to the size of the connecting column 22 on the limiting column 15, the connecting column 22 and the limiting column 15 are conveniently plugged together. A material tray 23 is clamped on the surface of the connecting column 22, a slide groove 24 is provided on the surface of the workbench 1, a stepper motor 25 is provided on the side of the workbench 1, a threaded rod 26 is provided at the output end of the stepper motor 25, and one end of the threaded rod 26 passes through the right side of the workbench 1 and is rotatably connected to the left side wall of the slide groove 24, a slider 27 is provided on the outer surface of the threaded rod 26, a connecting plate 28 is provided on the surface of the slider 27, and a mechanical arm 29 is provided on the surface of the connecting plate 28.

[0026] Working principle: The device for removing gold and tinning from the pins of components, when the material tray 23 needs to be replaced, starts the servo motor 9, so that the servo motor 9 drives the rotating rod 10 to rotate, and the rotating rod 10 drives the driving gear 11 to rotate, and the rotation of the driving gear 11 drives the chain 13 to rotate the driven gear 12, and the rotation of the driven gear 12 drives the rotating shaft 6 to rotate the disc 8, and the rotation of the disc 8 rotates the limiting column 15, and the rotation of the limiting column 15 drives the connecting column 22 to drive the material tray 23 to rotate, so that the processed components and the material tray 23 are rotated to the operator, and then the material tray 23 is taken out from the connecting column 22, and then the material tray 23 that needs to be replaced is inserted into the connecting column 22, so that people can easily use the device to be compatible with different component trays 23 at the same time.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing gold and tin from pins of QFP components, characterized in that: The invention comprises a workbench (1), wherein the surface of the workbench (1) is respectively provided with a gold removal station (2), a tinning station (3) and a preheating station (4), wherein a right-angle plate (5) is provided at the bottom of the workbench (1), wherein a circular groove (7) is provided on the surface of the workbench (1), wherein a circular disc (8) is provided inside the circular groove (7), wherein a rotating shaft (6) is provided on the surface of the right-angle plate (5), wherein one end of the rotating shaft (6) extends through the bottom surface of the workbench (1) and is rotatably connected to the bottom of the circular disc (8), wherein the right-angle plate (5) is provided with a rotating shaft (6) and one end of the rotating shaft (6) extends through the bottom surface of the workbench (1) and is rotatably connected to the bottom of the circular disc (8), wherein the right-angle plate (5) is provided with a rotating shaft (6) and a rotating shaft (6) is provided on the surface of the right-angle plate (5). A servo motor (9) is arranged on the surface of the angle plate (5); an output end of the servo motor (9) is rotatably connected to a rotating rod (10); a driving gear (11) is arranged on the outer surface of the rotating rod (10); a driven gear (12) is arranged on the outer surface of the rotating shaft (6); chains (13) meshing with the driving gear (11) and the driven gear (12) are arranged on the outer surfaces thereof; a limiting block (14) is arranged on the surface of the disc (8); and a limiting column (15) is arranged on the surface of the limiting block (14); The outer surface of the limiting column (15) is provided with a circular ring (16), the surface of the circular ring (16) is provided with a limiting plate (17), the side of the limiting plate (17) is provided with a pull rod (18), and one end of the pull rod (18) passes through the left side of the limiting plate (17) and extends to the left side of the limiting plate (17), a handle (19) is provided at the right end of the pull rod (18), a clamping block (20) is provided at the left end of the pull rod (18), a spring (21) is provided between the clamping block (20) and the limiting plate (17), and the spring (21) is sleeved on the outer surface of the pull rod (18), and the limiting column (15) A connecting column (22) is arranged inside, and a material tray (23) is clamped on the surface of the connecting column (22). A slide groove (24) is opened on the surface of the workbench (1). A stepper motor (25) is arranged on the side of the workbench (1). A threaded rod (26) is arranged at the output end of the stepper motor (25), and one end of the threaded rod (26) passes through the right side of the workbench (1) and is rotatably connected to the left side wall of the slide groove (24). A slider (27) is arranged on the outer surface of the threaded rod (26), and a connecting plate (28) is arranged on the surface of the connecting plate (28). A mechanical arm (29) is arranged on the surface of the connecting plate (28).

2. The device for removing gold and tin from pins of QFP components according to claim 1, characterized in that: The number of the limiting posts (15) and the connecting posts (22) is four, the four limiting posts (15) and the connecting posts (22) are arranged at equal distances in a circle, and the surfaces of the four connecting posts (22) are all clamped with a material tray (23).

3. The device for removing gold and tin from pins of QFP components according to claim 1, characterized in that: The limiting column (15) is provided with a hole whose size matches that of the connecting column (22) inside.

4. The device for removing gold and tin from pins of QFP components according to claim 1, characterized in that: The number of the clamping blocks (20) and the limiting plates (17) is eight, two of the clamping blocks (20) and the limiting plates (17) form a group, and four groups of the clamping blocks (20) and the limiting plates (17) are arranged at equal distances on the circumference.

5. The device for removing gold and tin from pins of QFP components according to claim 1, characterized in that: The number of the handles (19) is four, and the four handles (19) are arranged at equal distances around the circumference.

6. The device for removing gold and tin from pins of QFP components according to claim 1, characterized in that: The preheating table (4) is provided with a protective net.

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