A transistor processing pin tin dipping device

Abstract

The utility model discloses a triode processing pin tin dipping device relates to triode processing technical field, including the workbench, the both sides of workbench are provided with the vertical guide rail seat, and the workbench surface is sequentially provided with limiting assembly, tin dipping subassembly and receiving material subassembly along the guide rail seat length direction, and limiting assembly and guide rail seat sliding connection, and limiting assembly includes two sets of limiting unit of longitudinal distribution, and two sets of limiting unit are fixedly connected through "X" type support between, and limiting unit includes mounting seat and limiting panel. Adopt the inflatable silicon rubber limiting air bag as the clamping piece, utilize its flexibility, can through the air pressure adjustment adapt to the triode body of different appearance size, realize a set of clamp to complete the processing of various package, greatly improve the equipment utilization and production flexibility, save the tooling fixture cost and time needed because of product reforming, and the arc concave design of air bag inner surface and the soft contact with device surface provide uniform, soft clamping force.

Description

Technical Field

[0001] This utility model relates to the field of transistor processing, and in particular to a transistor pin tinning device. Background Technology

[0002] In the field of electronic component manufacturing, transistors require tin plating (or soldering) of their leads before being mounted onto circuit boards to prevent oxidation and ensure the reliability of subsequent soldering. Currently, the main methods for tin plating transistor leads are as follows:

[0003] Manual soldering: The operator uses a clamp to hold the transistor, manually dips it in flux, and then immerses the leads into the solder bath. This method is extremely inefficient, the immersion time and depth depend entirely on the operator's experience, resulting in poor quality consistency and safety risks such as burns.

[0004] Semi-automatic equipment using rigid clamps: This type of equipment uses rigid jaws or molds of specific shapes to hold the transistors, and then mechanically performs the soldering process. While efficiency is improved, a single clamp typically only fits one specific transistor package. When dealing with multiple package sizes, frequent clamp changes are required, resulting in long changeover times, poor equipment versatility, and increased production costs and management complexity.

[0005] Wave soldering equipment: Although it can be used for pin tinning, the equipment investment is large and the energy consumption is high. It is usually used for soldering the entire circuit board. For the pin processing of a single component, it is not economical and easily causes waste of solder. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a transistor pin tinning device, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a transistor pin tinning device, comprising a processing table, with longitudinal guide rails on both sides of the processing table, and a limiting component, a tinning component, and a receiving component sequentially arranged along the length of the guide rails on the surface of the processing table. The limiting component is slidably connected to the guide rails, and includes two sets of longitudinally distributed limiting units, which are fixedly connected by an "X"-shaped bracket. The limiting unit includes a mounting base and a limiting panel, with multiple limiting holes on the surface of the limiting panel, and a deflated limiting airbag provided on the inner wall of the limiting holes. The tinning component includes a first box and a mesh plate on its top, with a strip-shaped tinning opening on the mesh plate. A laterally movable scraper for scraping off oxide residue from the liquid surface is provided below the mesh plate in the first box. The receiving component includes a second box, with hollow current collectors on both sides of the top of the second box, and a vent hole at the inner end of the current collector. A buffer plate is provided inside the second box.

[0008] As a further technical solution of this utility model, an inflation tube is provided on the back of the limiting panel, and the inflation tube is connected to the limiting airbag through an inflation branch tube embedded inside the limiting panel.

[0009] As a further technical solution of this utility model, a sliding cavity is provided on the inner side of the mounting base, and sliding blocks adapted to the sliding cavity are provided at both ends of the limiting panel. The sliding blocks and the sliding cavity are fitted in a trapezoidal manner. A first telescopic rod is connected between the bottom of the mounting base and the limiting panel.

[0010] As a further technical solution of this utility model, the scraper is slidably connected to the track groove provided on the bottom surface of the mesh plate via a sliding rail.

[0011] As a further technical solution of this utility model, the inner end of the flow collector is set in an arc-shaped concave shape, and the outer side is provided with a pipe joint for connecting an external air source.

[0012] As a further technical solution of this utility model, the buffer plate is arranged in a trapezoidal shape and inclined inward, and its surface is covered with a foam buffer layer.

[0013] As a further technical solution of this utility model, the limiting unit also includes a drive wheel and a sliding seat; the surface of the guide rail seat is provided with two sets of limiting grooves; the drive wheel is configured as a gear meshing with one of the limiting grooves, and the sliding seat is configured as a dovetail slider engaging with the other limiting groove.

[0014] As a further technical solution of this utility model, a set of limit units has a drive motor connected to the drive wheel.

[0015] As a further technical solution of this utility model, the limiting airbag is made of silicone rubber, and its inner end surface is arc-shaped and concave.

[0016] This invention provides a device for tinning transistor leads, which has the following advantages compared with the prior art:

[0017] 1. This design presents a transistor pin tinning device that uses an inflatable silicone rubber limiting airbag as a clamping component. Utilizing its flexibility, the air pressure can be adjusted to accommodate transistor bodies of different shapes and sizes, enabling a single fixture to complete the processing of multiple packages. This greatly improves equipment utilization and production flexibility, saving the cost and time of tooling fixtures required for product changeovers. At the same time, the arc-shaped concave design of the inner surface of the airbag and its soft contact with the device surface provide uniform and gentle clamping force, effectively avoiding wear of the transistor surface printing, body cracking, or pin deformation that may be caused by rigid clamping, thus ensuring quality.

[0018] 2. This design presents a transistor pin tinning device. Through drive wheel 7 and gear rack transmission, and in conjunction with "X" type bracket, it forces synchronous drive of two sets of limiting components to ensure that multiple transistors arranged in a long row move without torque or asynchrony. All pins can be vertically and synchronously immersed into and out of the solder liquid, providing a fundamental guarantee for the consistency of tinning depth. The processing table integrates three functional stations: loading / clamping, tinning, and cooling / collection. Through automated program control of the sequential operation of each component, a continuous production process is formed, which significantly improves production efficiency and reduces manual labor intensity.

[0019] 3. The transistor pin tinning device designed in this paper integrates a high-temperature resistant titanium alloy scraper inside the tin bath, which can automatically scrape off the oxide residue on the liquid surface before or after each tinning, ensuring that the pins are always in contact with clean and fresh molten solder. This fundamentally avoids poor solder joints caused by oxide residue inclusions, greatly improving the stability and consistency of tinning quality. At the same time, the strip-shaped opening edge of the stainless steel mesh plate acts as a mechanical hard limiter, contacting the limiter panel or the transistor body, which can precisely control the pin immersion depth and ensure that all products in the same batch have the same tinning depth.

[0020] 4. The transistor pin tinning device designed in this paper has an arc-shaped air hole at the inner end of the current collector that can form a uniform and concentrated air curtain to directionally and efficiently force-cool the high-temperature pins, accelerate the solidification of the solder joint, help form a smooth and rounded solder joint shape, and prevent surface wrinkles or sharpening caused by slow natural cooling. The inclined buffer plate and the polyurethane foam layer on its surface provide effective cushioning for the falling transistor, avoiding pin deformation or body damage caused by the device falling. Attached Figure Description

[0021] Figure 1 This is a top view of a transistor pin tinning device.

[0022] Figure 2 Top view of the limiting component connection of a transistor pin tinning device;

[0023] Figure 3 A schematic diagram of the connection of the limiting component in a transistor pin tinning device;

[0024] Figure 4 An exploded view of the connection of the limiting component in a transistor pin tinning device;

[0025] Figure 5 An exploded view of the soldering assembly connection of a transistor pin soldering device;

[0026] Figure 6 This is an exploded view of the receiving assembly connection of a transistor pin tinning device.

[0027] In the diagram: 1. Processing table; 2. Guide rail seat; 3. Limiting component; 4. Tin-dipping component; 5. Material receiving component; 6. Mounting seat; 7. Drive wheel; 8. Sliding seat; 9. Base plate; 10. Limiting panel; 11. Limiting hole; 12. Limiting airbag; 13. First telescopic rod; 14. Sliding cavity; 15. Outer support; 16. Inflation pipeline; 17. First box; 18. Net plate; 19. Track groove; 20. Scraper; 21. Sliding rail; 22. Second telescopic rod; 23. Buffer plate; 24. Flow collector; 25. Second box. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 This utility model provides a technical solution for a transistor pin tinning device: it includes a processing table 1, with longitudinally arranged guide rail seats 2 on both sides of the processing table 1. Two sets of limiting grooves are provided on the surface of the guide rail seats 2. From the first end to the last end, the surface of the processing table 1 is sequentially provided with a limiting component 3, a tinning component 4 and a receiving component 5. The limiting component 3 is slidably sleeved with the guide rail seat 2. There are two sets of limiting components 3 distributed longitudinally, one of which is set as the main drive. The two sets are fixedly connected by an "X" type bracket.

[0030] The limiting component 3 includes a mounting base 6 with relatively distributed components and a limiting panel 10 that is movably embedded inside the mounting base 6. A drive wheel 7 is movably connected to the outside of the mounting base 6. A sliding seat 8 is connected to the outside of the drive wheel 7 through a set of movable sleeves. The drive wheel 7 and the movable sleeve are movably sleeved together. The movable sleeve and the sliding seat 8 are fixedly connected inside the sliding seat 8. The drive wheel 7 is set as a drive gear. It and the sliding seat 8 are respectively embedded in two sets of limiting grooves on the surface of the guide rail seat 2. The sliding seat 8 and the corresponding limiting groove are in a dovetail sliding fit. The drive wheel 7 and the corresponding sliding groove are in a toothed fit.

[0031] The outer end of the drive wheel 7 in the limit assembly 3, which is set as the main drive, is fixedly connected to a set of drive shafts embedded in the movable sleeve. The outer end of the drive shaft passes through the sliding seat 8 and is equipped with a drive motor.

[0032] The surface of the limiting panel 10 is provided with multiple sets of adjacent limiting holes 11 with built-in limiting airbag 12. Both sides of the back of the limiting panel 10 are fixedly connected to the outer support 15. The inner side of the outer support 15 is fixedly connected to the inflation tube 16. The inflation tube 16 is located laterally on the back of the limiting panel 10. An inflation branch tube is also provided on its inner side and embedded in the inner side of the limiting panel 10. The inflation branch tube and the limiting airbag 12 are connected in communication inside the limiting panel 10.

[0033] The inner side of the mounting base 6 is provided with an inwardly opening sliding cavity 14. The two ends of the limiting panel 10 are provided with sliding blocks corresponding to the sliding cavity 14. The sliding blocks and the sliding cavity 14 are fitted in a trapezoidal shape. The bottom of the sliding cavity 14 is fixedly connected to a base plate 9. The top of the base plate 9 and the limiting panel 10 are fixedly connected to a first telescopic rod 13.

[0034] The tin-dipping assembly 4 includes a first box 17 and a mesh plate 18 on its top. Track grooves 19 are provided on both sides of the longitudinal surface of the mesh plate 18. Two sets of transverse strip-shaped tin-dipping openings are provided in the center of the surface of the mesh plate 18. The width of the strip-shaped tin-dipping openings is greater than the width of the limiting panel 10. A vertically arranged scraper 20 is movably connected to the bottom surface of the mesh plate 18. The scraper 20 includes upper and lower plates that are telescopically connected by a micro telescopic rod. A sliding rail 21 is fixedly connected to the inner side of the upper plate corresponding to the track groove 19. A second telescopic rod 22 is fixedly connected to the outer end of the sliding rail 21 and is also connected to the inner side of the track groove 19. The scraper 20 is located in the upper part of the first box 17.

[0035] The receiving assembly 5 includes a second box 25 and a built-in buffer plate 23. The buffer plate 23 is trapezoidal and inclined inward. Its surface is provided with a sponge buffer layer. Hollow flow collectors 24 are fixedly connected to the top two sides of the second box 25. The inner end of the flow collector 24 is arc-shaped and concave. Its inner end surface is also provided with vent holes. The outer surface of the flow collector 24 is provided with a pipe joint for connecting to an external pump body.

[0036] like Figure 1-3 As shown, a transparent protective cover (not shown) can be installed around the processing table 1. The guide rail seat 2 is a linear guide rail, the drive wheel 7 is a powder metallurgy gear, the limit panel 10 is a polypropylene panel, and the lower plate in the scraper 20 is a high-temperature resistant titanium alloy triangular plate.

[0037] like Figure 3-4 As shown, the limiting airbag 12 is a silicone rubber airbag, which is set vertically on both sides of the inner wall of the limiting hole 11, and its inner end surface is set in an arc-shaped concave shape.

[0038] like Figure 5-6As shown, the first box 17 is made of stainless steel with nickel-based alloy sprayed on the surface. Both the first box 17 and the second box 25 are provided with multiple sets of connecting supports that are connected to the surface of the processing table 1. The mesh plate 18 is made of stainless steel mesh. Except for the strip-shaped dip-coating opening, the rest of the first box 17 can be covered with a heat insulation plate to reduce heat loss and the risk of burns. At the same time, a corresponding protective cover is installed on the top of the track groove 19. The second box 25 and the flow collector 24 are both made of stainless steel, and the buffer plate 23 is made of polyurethane foam.

[0039] The linear motion drive system specifically involved in this device consists of the meshing transmission between the drive wheel 7 and the toothed limiting groove on the guide rail seat 2, which constitutes the longitudinal movement drive system of the limiting component 3 in this device. This system is essentially a specific application of a gear and rack transmission mechanism. The servo motor (or stepper motor) and its matching reducer and driver that realize this drive are all standard parts in the field of automation. Its control method (such as controlling the motor start, stop and positioning through PLC or microcontroller) is a known technology. This device uses this mature technology to achieve precise and stable movement of the limiting component between workstations above the processing table.

[0040] The lifting actuator consists of a "first telescopic rod 13" that pushes the limit panel 10 up and down, a "second telescopic rod 22" that drives the scraper 20, and a "miniature telescopic rod". Its function is to achieve linear reciprocating motion, which can be achieved by linear actuators such as cylinders, hydraulic cylinders, or electric push rods. The selection of these actuators (such as stroke, thrust, speed), installation, and matching connection of their air / power sources are all conventional designs and selections that can be made by those skilled in the art based on the design parameters, and are not the innovation of this utility model. This device uses these mature actuators to realize the automated actions of lowering before tinning and rising after tinning, as well as slag scraping.

[0041] Pneumatic control system: The limiting airbag 12 provides an inflation pipeline 16 with inflation and deflation functions, an external air source (such as a small air compressor), solenoid valves, etc., which constitute a standard pneumatic control system. The design and implementation of this system is common knowledge in the field of fluid transmission. The innovation of this device lies in the application scenario and specific structural design of the airbag for the flexible limiting of the triode, rather than its pneumatic principle itself, so it will not be elaborated further.

[0042] This device is controlled by a programmable logic controller (PLC) or a microcontroller system. This system receives a start signal from the operator and executes the following steps sequentially according to a preset program:

[0043] Limiting airbag inflates and clamps → Drive motor starts, moves to the tin-dipping station → First telescopic rod descends → Delay (tin-dipping time, adjustable from 1 to 3 seconds) → First telescopic rod rises → Drive motor starts, moves to the receiving station → Second telescopic rod moves (drive scraper to remove slag, can be performed before or after tin-dipping) → First telescopic rod descends → shroud vents for cooling → Delay (cooling time) → Limiting airbag deflates → Component falls into the receiving box → First telescopic rod rises → Drive motor starts, returns to the loading station, waits for the next cycle.

[0044] The working principle of this utility model is as follows: When using this device, the user vertically inserts multiple sets of transistors into the limiting hole 11, and the limiting airbag 12 is inflated to clamp the upper part of the transistor, so that the bottom pin is in a vertical position.

[0045] Then the drive wheel 7 rotates and moves with the corresponding limiting groove on the surface of the guide rail seat 2 through the toothed structure, driving the entire limiting component 3 to move and adjust longitudinally along the guide rail seat 2. During this process, the sliding seat 8 slides along the limiting groove on the surface of the guide rail seat 2 to ensure the movement stability of the entire limiting component 3. It should be noted that among the two sets of limiting components 3, one set of limiting components 3 is set to be actively driven to push the other set of limiting components 3 to move and adjust synchronously.

[0046] When it moves above the tin-dipping assembly 4, the first telescopic rod 13 descends, causing the limiting panel 10 connected to it to descend as a whole, so that the pins at the bottom of the transistor are inserted into the strip-shaped tin-dipping opening on the surface of the limiting panel 10, thus completing the pin tin-dipping operation.

[0047] After the tinning is completed, the first telescopic rod 13 returns to its original position, causing the tinned transistor to rise and the pins to disengage from the first housing 17. Then the drive wheel 7 moves along the corresponding sliding groove again, moving the limiting component 3 as a whole above the receiving component 5.

[0048] The limiting component 3 descends again, so that the pin position is placed between the flow collectors 24 on both sides of the second box 25. The flow collectors 24 deliver external airflow to cool and solidify the pin position. After the treatment is completed, the limiting airbag 12 releases the transistor, and the transistor falls onto the buffer plate 23 to complete the material collection in the second box 25.

[0049] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A transistor pin tinning apparatus, comprising a processing table (1), characterized in that: The processing table (1) is provided with longitudinal guide rail seats (2) on both sides. The surface of the processing table (1) is provided with a limit component (3), a tin-dipping component (4) and a material receiving component (5) in sequence along the length direction of the guide rail seats (2). The limiting component (3) is slidably connected to the guide rail seat (2). The limiting component (3) includes two sets of limiting units distributed longitudinally, and the two sets of limiting units are fixedly connected by an "X"-shaped bracket. The limiting unit includes a mounting base (6) and a limiting panel (10). The limiting panel (10) has multiple sets of limiting holes (11) on its surface, and the inner wall of the limiting hole (11) is provided with an inflatable and deflated limiting airbag (12). The tin-dipping assembly (4) includes a first box (17) and a mesh plate (18) disposed on its top. The mesh plate (18) has a strip-shaped tin-dipping opening. Inside the first box (17) below the mesh plate (18), there is a horizontally movable scraper (20) for scraping off oxide residue from the liquid surface. The receiving assembly (5) includes a second box (25), with hollow flow collectors (24) on both sides of the top of the second box (25), and ventilation holes at the inner end of the flow collectors (24). A buffer plate (23) is provided inside the second box (25).

2. The transistor pin tinning apparatus according to claim 1, characterized in that: An inflation pipe (16) is provided on the back of the limiting panel (10), and the inflation pipe (16) is connected to the limiting airbag (12) through an inflation branch pipe embedded inside the limiting panel (10).

3. The transistor pin tinning apparatus according to claim 1, characterized in that: The mounting base (6) has a sliding cavity (14) inside. The limiting panel (10) has sliding blocks at both ends that are adapted to the sliding cavity (14). The sliding blocks and the sliding cavity (14) are fitted in a trapezoidal shape. A first telescopic rod (13) is connected between the bottom of the mounting base (6) and the limiting panel (10).

4. The transistor pin tinning apparatus according to claim 1, characterized in that: The scraper (20) is slidably connected to the track groove (19) provided on the bottom surface of the mesh plate (18) via the sliding rail (21).

5. The transistor pin tinning apparatus according to claim 1, characterized in that: The inner end of the flow collector (24) is arc-shaped and concave, and the outer side is provided with a pipe joint for connecting to an external air source.

6. The transistor pin tinning apparatus according to claim 1, characterized in that: The buffer plate (23) is arranged in a trapezoidal shape and tilted inward, and its surface is covered with a foam buffer layer.

7. The transistor pin tinning apparatus according to claim 1, characterized in that: The limiting unit also includes a drive wheel (7) and a sliding seat (8); the guide rail seat (2) has two sets of limiting grooves on its surface; the drive wheel (7) is configured as a gear that meshes with one of the limiting grooves, and the sliding seat (8) is configured as a dovetail slider that fits into the other limiting groove.

8. The transistor pin tinning apparatus according to claim 1, characterized in that: One of the limiting units has a drive wheel (7) connected to a drive motor.

9. The transistor pin tinning apparatus according to claim 1, characterized in that: The limiting airbag (12) is made of silicone rubber, and its inner end surface is arc-shaped and concave.

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