Automatic tin removing device

Abstract

The invention discloses an automatic tin removing device, and belongs to the technical field of electronic equipment processing. The device aims at solving the problems that existing tin removing operation is low in efficiency and poor in precision. According to the technical scheme, the clamping device is characterized in that the clamping device comprises a supporting table, a guide rail with a sliding groove and a clamping belt wheel with a sliding groove, the guide rail can be slidably locked to adjust the guide width, the clamping belt wheel can be slidably locked to adjust the clamping tightness degree, the clamping belt wheel comprises a high-temperature-resistant belt, a motor and a steering shaft, and the motor drives the belt to move a workpiece; a conveying track is fixed in the supporting table to convey workpieces; a hot air system is fixed on the supporting table and comprises a control table, a hot melting blower gun, a high-pressure hot air gun and a high-pressure hot air gun steering shaft, the hot air temperature is adjusted by the control table, the hot melting blower gun preheats and melts soldering tin, and the blowing angle of the high-pressure hot air gun is adjustable. The automatic detinning device is mainly used for automatically detinning workpieces in electronic equipment machining, and the detinning efficiency and precision are improved.

Description

Technical Field

[0001] The invention relates to the field of microelectronic packaging and assembly equipment, in particular to a chip solder removal device. Background Art

[0002] In electronic manufacturing, maintenance, and related industries involving soldering processes, detinning is a crucial process. Solder is widely used in the connection and fixation of electronic components. During product upgrades, maintenance, rework, or scrapping, the original solder needs to be removed so that electronic components can be disassembled, replaced, or re-soldered. Traditional detinning methods mainly rely on manual operation, using tin-absorbing cotton to manually sweep the tin. However, this method has high technical requirements for the operator, and the detinning effect is greatly affected by human factors. It is easy to have incomplete detinning, resulting in residual solder on the pad, or damage to the pad due to excessive force, affecting the subsequent welding quality.

[0003] In order to solve the shortcomings of traditional detinning methods, some automated detinning equipment has gradually appeared on the market. However, most of the existing automatic detinning equipment have problems such as single function and inflexible adjustment. Some equipment only has a simple detinning function and cannot be flexibly adjusted according to workpieces of different sizes and shapes, resulting in limited scope of application. Therefore, the development of an automatic detinning device that can flexibly adjust the guide width and clamping tightness, achieve smooth and precise movement of the workpiece, have good hot air treatment effect and a wide range of applications has become an urgent problem to be solved in the electronics manufacturing and maintenance industries. An automatic detinning device of the present invention is proposed to address the deficiencies of the above-mentioned prior art, and aims to provide an efficient, accurate and flexible detinning solution to meet the strict requirements of the modern electronics industry for detinning processes. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of existing manual desoldering techniques by providing an automatic desoldering device. This device can flexibly adjust the guide width and clamping tightness according to workpieces of varying sizes and shapes, enabling smooth and precise movement of workpieces during the desoldering process. Furthermore, it provides efficient and precise hot air processing capabilities, significantly improving desoldering efficiency and quality, expanding its scope of application, and meeting the stringent requirements of modern electronics manufacturing, maintenance, and related industries for high-precision, high-efficiency, high-consistency, and high-versatility desoldering processes.

[0005] This automatic detinning device is mainly composed of key components such as the support platform, guide rails, clamping pulleys, conveyor belts and hot air system. These components work together to complete the detinning operation of the workpiece.

[0006] The support platform serves as the foundational structure for the entire device, providing a stable mounting platform for other components. Made of high-strength, corrosion-resistant materials, it ensures it can withstand the weight of each component and the various forces generated during operation, maintaining the overall stability of the device over long-term use.

[0007] The guide bar is equipped with a slide groove, which allows it to slide relative to the support platform. It is also equipped with a reliable locking mechanism to securely lock the guide bar once it has slid into the desired position. This design allows the guide bar's width to be flexibly adjusted to suit the size of the workpiece. During the desoldering process, the guide bar accurately guides the workpiece into the desoldering area, preventing it from shifting during transport and ensuring the accuracy of the desoldering operation.

[0008] The clamping pulley is also provided with a slide groove, which can slide and lock relative to the support table to adjust the clamping tightness. The clamping pulley is mainly composed of a high-temperature resistant belt, a motor and a steering shaft. The high-temperature resistant belt is made of a special high-temperature resistant material and can work stably for a long time in a high-temperature environment without being damaged. The motor serves as a power source to drive the high-temperature resistant belt to operate. During the desoldering process, the high-temperature resistant belt contacts the workpiece and drives the workpiece to move through its operation, thereby realizing the movement control of the workpiece during the desoldering process. The steering shaft is used to adjust the running direction of the high-temperature resistant belt to ensure that the workpiece can move along the predetermined path.

[0009] The conveyor belt is fixedly mounted inside the support platform and offers excellent transmission performance and stability. Driven by a motor, it operates smoothly and continuously, transporting workpieces from one end of the device to the desoldering area and, once desoldering is complete, to the other end. The conveyor belt's operating speed can be adjusted to meet the requirements of different desoldering processes.

[0010] The hot air system is fixed on the support table, and is mainly composed of a control console, a hot melt air gun, a high-pressure hot air gun and a high-pressure hot air gun steering shaft. The control console is the core control component of the hot air system, through which the hot air temperature can be precisely adjusted. During the detinning process, according to different solder materials and workpiece structures, the appropriate hot air temperature can be set on the control console to ensure that the solder can be effectively preheated and melted. The high-pressure hot air gun is connected to the control console through the high-pressure hot air gun steering shaft, and its blowing angle can be flexibly adjusted through the high-pressure hot air gun steering shaft. After the solder melts, the high-pressure hot air gun can blow the melted solder away from the workpiece surface at a suitable angle and wind force to achieve efficient detinning. The precise adjustment of the blowing force and angle of the high-pressure hot air gun can avoid excessive heating or damage to the workpiece, while ensuring that the solder is completely removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a structural schematic diagram of an automatic tin removal device of the present invention;

[0012] Figure 2 This is a structural side view of an automatic detinning device of the present invention;

[0013] Figure 3 Schematic diagram of the structure of the guide bar;

[0014] Figure 4 It is a structural diagram of the clamping pulley;

[0015] Figure 5 It is a structural diagram of the conveyor belt;

[0016] Figure 6 It is a structural diagram of the hot air system;

[0017] In the figure: 1. Support platform 2. Guide bar 3. Clamping pulley 4. Conveyor track 5. Hot air system 2-1. Guide bar arm 2-2. Guide bar slide 3-1. High-temperature resistant belt 3-2. Motor 6-3. Steering shaft 6-4. Strain gauge 4-1. High-temperature resistant belt 4-2. Motor 5-1. Hot melt air gun 5-2. High-pressure hot air gun 5-3. High-pressure hot air gun steering shaft 5-4. Control console. DETAILED DESCRIPTION

[0018] The specific embodiments of the automatic detinning device of the present invention are described in detail below with reference to the accompanying drawings.

[0019] 1. Overall layout and installation of the device

[0020] The automatic detinning device mainly consists of a support platform (1), a guide bar (2), a clamping pulley (3), a transmission crawler (4) and a hot air system (5). The components are reasonably arranged and installed on the support platform (1) to work together to complete the detinning operation.

[0021] The support platform (1) is made of high-strength, corrosion-resistant aluminum alloy through precision casting and machining. The bottom of the support platform is provided with adjustable support feet to ensure that the device is placed stably. Sufficient space is reserved inside the support platform (1) for installing the drive motor of the conveyor crawler (4) and other related components. At the same time, a plurality of mounting holes and slide grooves are provided on the surface to facilitate the installation and adjustment of other components.

[0022] 2. Implementation of the Guide Bar (2)

[0023] The guide rail (2) is composed of a guide rail arm (2-1) and a guide rail chute (2-2). Figure 3As shown. The guide rail arm (2-1) is made of stainless steel and has good strength and rigidity. The guide rail slide groove (2-2) is formed on the guide rail arm (2-1) by machining, and its width and depth are precisely designed to ensure good cooperation with the slide rail on the support platform (1).

[0024] During installation, align the guide bar slide groove (2-2) of the guide bar (2) with the slide rail on the support platform (1), and then slowly push the guide bar (2) so that it can slide smoothly on the slide rail. When the guide bar (2) slides to a suitable position to adapt to the size of the workpiece to be detinned, the guide bar (2) is fixed to the support platform (1) by the locking bolt. The locking bolt is made of high-strength alloy steel and the surface is galvanized to give it good rust resistance. In the process of adjusting the guide bar (2), the distance between the guide bars (2) can be accurately measured by tools such as a ruler or a laser rangefinder to ensure that the guide width meets the requirements and can be flexibly adjusted within the range of 10-200mm.

[0025] 3. Implementation of Clamping Pulley (3)

[0026] The clamping pulley (3) includes a high temperature resistant belt (3-1), a motor (3-2), a steering shaft (3-3) and a strain gauge (6-4), such as Figure 4 As shown. The high-temperature resistant belt (3-1) is made of a composite weave of polytetrafluoroethylene fiber and glass fiber, and is coated with a high-temperature resistant fluororubber layer on the surface. It can work stably for a long time in a high-temperature environment of 350°C. The motor (3-2) adopts an AC servo motor, which has the advantages of a wide speed adjustment range, fast response speed, and high control accuracy. Its rated power is 500W and the speed adjustment range is 0-2500r / min. The steering shaft (3-3) can realize flexible steering of the high-temperature resistant belt (3-1) within the range of ±40°. The strain gauge (6-4) is attached to the support structure of the clamping pulley (3) to monitor the size of the clamping force in real time and transmit the signal to the control system.

[0027] During installation, ensure that the tension of the high-temperature-resistant belt (3-1) is moderate; it should not be too loose, causing slippage, nor too tight, increasing the load on the motor. By adjusting the position of the motor (3-2) and the angle of the steering shaft (3-3), the clamping pulley (3) can maintain good contact with the workpiece, and the clamping tension can be adjusted according to the thickness and shape of the workpiece. The clamping tension can be precisely adjusted by the control system based on the feedback signal from the strain gauge (6-4), with an adjustment range of 0.2-4N.

[0028] 4. Implementation of conveyor belt (4)

[0029] The conveyor belt (4) is mainly composed of a high temperature resistant belt (4-1) and a motor (4-2). Figure 5As shown. The material and structure of the high-temperature resistant belt (4-1) are the same as those of the high-temperature resistant belt in the clamping pulley (3), but the width and length are designed according to the overall layout of the device and the transmission requirements of the workpiece, and the width is generally 80mm. The motor (4-2) adopts a DC reduction motor with high torque and smooth operation. Its rated power is 300W and the speed adjustment range is 3-40r / min.

[0030] When the conveyor belt (4) is installed inside the support platform (1), the motor (4-2) is first fixed to one end of the support platform (1), and then the high-temperature resistant belt (4-1) is passed around the roller inside the support platform (1) and connected to the output shaft of the motor (4-2). By adjusting the position of the roller and the tensioning device, the high-temperature resistant belt (4-1) maintains an appropriate tension to ensure that the workpiece can be smoothly transmitted on the conveyor belt (4). During the operation of the device, the speed of the motor (4-2) can be adjusted by the control system to control the running speed of the conveyor belt (4) to meet the requirements of different detinning processes.

[0031] V. Implementation of hot air system (5)

[0032] The hot air system (5) includes a hot melt air gun (5-1), a high pressure hot air gun (5-2), a high pressure hot air gun steering shaft (5-3) and a control console (5-4), such as Figure 6 As shown. The hot melt air gun (5-1) uses a ceramic heating tube as a heating element, which has the characteristics of fast heating speed and high thermal efficiency. Its power is 1500W, and it can raise the hot air temperature to the set value in a short time. The high-pressure hot air gun (5-2) is composed of a high-pressure fan and a high-efficiency heating wire. It has strong wind power and uniform heating. Its power is 2000W, and the wind power adjustment range is 0-8m / s. The steering shaft (5-3) of the high-pressure hot air gun adopts a combination structure of an electric push rod and a rotating joint, which can realize the precise movement and angle adjustment of the high-pressure hot air gun (5-2) in the horizontal and vertical directions. The adjustment range is ±20° and the adjustment accuracy is ±0.5°. The control console (5-4) adopts a PLC control system and is equipped with a touch screen operation interface. The operator can set parameters such as hot air temperature, wind power and angle of the high-pressure hot air gun (5-2) through the touch screen.

[0033] When installing the hot air system (5), fix the hot melt air gun (5-1) and the high-pressure hot air gun (5-2) at appropriate positions on the support platform (1) respectively, and connect them to the control console (5-4) through the high-pressure hot air gun steering shaft (5-3). During the connection process, ensure that the electrical circuit is connected correctly and the signal transmission is stable. Before the device is operated, set the appropriate hot air temperature and wind force through the control console (5-4) according to the solder material and structure of the workpiece to be detinned. The hot air temperature adjustment range is 60-480℃, and the adjustment accuracy is ±1℃. During the detinning process, adjust the angle of the high-pressure hot air gun (5-2) through the high-pressure hot air gun steering shaft (5-3) so that it can blow the melted solder away from the workpiece surface at the optimal angle.

[0034] 6. Device operation process

[0035] When the workpiece needs to be detinned, first adjust the guide width of the guide bar (2) according to the size of the workpiece so that it can accurately guide the workpiece into the detinning area. Then, adjust the clamping tightness of the clamping pulley (3) to ensure that the workpiece remains stable during movement. Start the conveyor belt (4) to transport the workpiece from one end of the device to the detinning area. At this time, the hot air system (5) starts working, the control console (5-4) adjusts the hot air temperature according to the preset parameters, and the hot melt air gun (5-1) preheats the solder on the workpiece to melt the solder. Subsequently, the clamping pulley (3) drives the workpiece to move, and at the same time, the high-pressure hot air gun (5-2) blows the melted solder away from the surface of the workpiece at a suitable angle and wind force. After the detinning operation is completed, the conveyor belt (4) transports the workpiece to the other end of the device, completing the entire detinning process.

[0036] During the operation of the device, each component transmits and communicates data with the control console (5-4) through sensors and signal lines. The control console (5-4) monitors the operating status of each component in real time and makes adjustments based on actual conditions to ensure efficient and stable operation of the entire detinning process.

[0037] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. An automatic detinning device, characterized in that: The device includes a support platform, a guide bar, a clamping pulley, a conveyor belt and a hot air system; wherein, the guide bar is provided with a slide groove, which can slide relative to the support platform and has a locking function, so as to adjust the guide width; the clamping pulley is also provided with a slide groove, which can slide and lock relative to the support platform, thereby adjusting the clamping tightness of the workpiece; the conveyor belt is firmly installed inside the support platform for transmitting the workpiece; the hot air system is fixed on the support platform for performing tin removal operations on the workpiece.

2. An automatic detinning device according to claim 1, characterized in that: The clamping pulley is mainly composed of a high-temperature resistant belt, a motor and a steering shaft; the high-temperature resistant belt is driven by the motor to operate, thereby driving the workpiece to move during the detinning process.

3. The automatic detinning device according to claim 1, characterized in that: The hot air system includes a control console, a hot melt air gun, a high-pressure hot air gun and a high-pressure hot air gun steering shaft; the hot air temperature is precisely adjusted by the control console; the solder on the workpiece is first preheated and melted by the hot melt air gun; the high-pressure hot air gun is connected to the control console via the high-pressure hot air gun steering shaft, and the blowing angle of the high-pressure hot air gun can be adjusted with the help of the high-pressure hot air gun steering shaft.

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