Device for automatically adding tin bars to tin furnace

Abstract

The utility model provides a device for automatically adding tin bars to a tin furnace, and relates to the technical field of wave soldering equipment, the device comprises a tin furnace pot, the outer side of the tin furnace pot is fixedly connected with a fixing rod, the inner part of the fixing rod is fixedly connected with a supporting rod, the top of the supporting rod is fixedly connected with an inclined table, and the inclined table is fixedly connected with the tin furnace pot. A connecting plate is fixedly connected to the top of the inclined table, a PLC control mold box is fixedly connected to the outer side of the connecting plate, an air cylinder is fixedly connected to the top of the connecting plate, and a tin bar containing groove is formed in the outer side of the air cylinder. And the buffer plate blocks part of the splashed tin liquid to achieve secondary protection, so that automatic tin feeding is achieved, the workload of tin furnace operators and rear-section tin point maintenance operation is reduced, the personnel cost is reduced, the quality after welding is high and stable due to the stable tin liquid level height, and the product reliability is improved.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, and in particular to a device for automatically adding solder bars to a solder furnace. Background Technology

[0002] With the continuous upgrading of electronic products, consumers have put forward higher requirements for product quality and stability. Therefore, the soldering quality of products has become the focus of attention. At present, most wave soldering equipment requires manual addition of solder bars to the solder pot. However, if the solder level in the pot is less than 10 mm, it will seriously affect the soldering quality. High-quality soldering effect has become the way for enterprises to survive. In the exploration of how to improve soldering quality, the automatic solder pot adding device has emerged to improve soldering quality.

[0003] Traditional wave soldering suffers from a sharp decline in solder quality as the molten solder level in the furnace decreases, resulting in various defects that general equipment cannot effectively filter. Assembled products then enter the market, posing significant safety and quality risks and impacting end-customer experience and acceptance. Automatic soldering devices, by precisely monitoring the molten solder level and controlling the addition of solder bars, maintain the molten solder level within a specific range, thus ensuring consistently high solder quality. Automatic soldering devices provide a solution for improving solder quality.

[0004] The existing device for automatically adding solder bars to a solder pot has the following shortcomings:

[0005] Currently, there are no devices on the market that can automatically detect and control the amount of solder added to the solder pot. All soldering is done manually. When it is necessary to improve the soldering quality of the product, manual feeding not only increases labor costs, but also makes it impossible to continuously and accurately control the level of molten solder in the solder pot. When the level is too high, too much molten solder adheres to the circuit board, causing bridging, short circuits, and increased solder consumption costs. When the level is too low, a complete and stable solder peak cannot be formed, resulting in some component pins not being fully wetted with solder, resulting in poor solder joints and insufficient solder joint strength. During the subsequent use, transportation, and vibration of electronic products, the solder joints are prone to cracking, causing poor contact.

[0006] Therefore, we propose a device for automatically adding solder bars to a solder pot to solve the problems mentioned above. Utility Model Content

[0007] When the molten solder level drops due to use, the displacement sensor detects that the level has exceeded the threshold and sends a signal to the PLC control module. The module then instructs the solenoid valve to move the cylinder to push the solder bar placed in the slot into the solder pot. Afterward, it instructs the solenoid valve to retract the cylinder, completing the automatic feeding process. This ensures that the molten solder in the solder pot remains at a stable and standard threshold level for a long time. Inside the solder pot, a sliding bar on a slide bar is connected to a buffer plate via a spring. When the solder bar falls, it passes through the buffer plate. The buffer plate rotates slowly with the sliding bar and a rotating rod coated with viscous silicone oil, allowing the solder bar to gently enter the solder pot. This prevents molten solder from splashing and causing injury or material waste. The buffer plate also blocks some of the splashed molten solder, providing secondary protection and solving the problems mentioned in the background technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a device for automatically adding solder bars to a solder pot, comprising a solder pot, a fixing rod fixedly connected to the outside of the solder pot, a support rod fixedly connected to the inside of the fixing rod, a ramp fixedly connected to the top of the support rod, a connecting plate fixedly connected to the top of the ramp, a PLC control module fixedly connected to the outside of the connecting plate, a cylinder fixedly connected to the top of the connecting plate, a solder bar placement slot provided on the outside of the cylinder, multiple unused solder bars provided inside the solder bar placement slot, a displacement sensor fixedly connected to the outside of the solder bar placement slot, a solenoid valve fixedly connected to the bottom of the ramp, a base fixedly connected to the outside of the solder pot, and a nitrogen protection mechanism provided on the top of the base.

[0009] Preferably, it includes a nitrogen generator, which is fixedly connected to the top of the base. A connecting pipe is connected to the outside of the nitrogen generator, and a gas-gathering box is fixedly connected to the connecting pipe. An outlet is connected to the bottom of the gas-gathering box.

[0010] Preferably, the vent hole of the vent head is opened horizontally along the surface of the molten tin, and the connecting pipe is fixedly connected to the tin pot.

[0011] Preferably, a plurality of sliding rods are fixedly connected to the inner side of the tin pot, and two sliding strips are slidably connected to the outer side of the plurality of sliding rods.

[0012] Preferably, a control slide is fixedly connected to the top of the sliding bar, and a rotating rod is rotatably connected to the inner side of the sliding bar.

[0013] Preferably, a spring is provided on the outer side of the rotating rod, and a buffer plate is fixedly connected to the outer side of the rotating rod.

[0014] Preferably, the spring is fixedly connected to the buffer plate, and the other end of the spring is fixedly connected to the slider.

[0015] Preferably, a plurality of spring-loaded telescopic sliders are fixed on the control slider, and the spring-loaded telescopic sliders engage with the sliding grooves opened on the inner side of the slide rod.

[0016] Preferably, a lifting ring is fixed on the control slider, and the part of the rotating rod that rotates with the sliding bar is coated with viscous silicone oil.

[0017] Preferably, the top of the fixing rod has a mounting hole, the inner diameter of which is slightly larger than the size of the mounting bolt fixed at the bottom of the support rod, and the shape of the mounting hole is consistent with that of the mounting bolt.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] 1. In this utility model, when soldering work needs to begin, after turning on the device, a displacement sensor is set as needed. Initial solder is first added to the solder pot. The displacement sensor is set above the solder pot and horizontally. After working for a period of time, the solder level drops due to use. After the displacement sensor detects that the level has exceeded the threshold, it sends a signal to the PLC. The control module commands a solenoid valve to push a solder bar from the placement tank into the solder pot. The solenoid valve then retracts the cylinder, completing the automatic feeding process. When the liquid level drops again, a displacement sensor continuously repeats the feeding process, ensuring the solder in the pot remains at a stable and standard threshold. This prevents poor soldering due to low solder levels and bridging due to high solder levels. A sliding bar on a slide rod inside the pot is connected to a buffer plate via a spring. As the solder bar falls, it passes through the buffer plate, which, along with a rotating rod coated with viscous silicone oil, slowly guides the solder bar into the pot, preventing splashing that could cause injury or material waste. The buffer plate also provides secondary protection by blocking some of the splashed solder. This automated solder feeding reduces the workload of the solder pot operator and subsequent solder joint maintenance, lowering labor costs. The stable solder level also ensures high and consistent soldering quality, improving product reliability.

[0020] 2. In this utility model, when welding is being performed, molten tin easily reacts with oxygen in the air to form waste, which affects the quality of welding to a certain extent. When the tin pot is sealed under vacuum, welding cannot be performed. Therefore, a nitrogen generator is installed on the outside of the tin pot, and nitrogen is output through a connecting pipe. The nitrogen reaches the gas concentrator box through the connecting pipe. The gas concentrator box can pressurize the nitrogen to a certain extent and then spray it out from the gas outlet. The pressurized nitrogen is sprayed out through a specially designed gas outlet to form a gas curtain with a long distance, which isolates the molten tin from the air, reduces the waste of tin resources caused by tin dross, reduces production costs, and reduces the quality risk of the molten tin being mixed into the solder joint, which affects the conductivity and mechanical strength. Attached Figure Description

[0021] Figure 1This utility model provides a perspective view of the main structure of an automatic solder bar feeding device for a solder pot;

[0022] Figure 2 This utility model provides a three-dimensional structural breakdown view of a device for automatically adding solder bars to a solder pot;

[0023] Figure 3 This utility model provides a partial structural perspective view of a device for automatically adding solder bars to a solder pot;

[0024] Figure 4 This utility model provides a three-dimensional structurally disassembled view of the nitrogen protection mechanism in an automatic solder bar feeding device for solder pots.

[0025] Figure 5 This utility model provides a split view of the anti-splatter plate in an automatic solder bar feeding device for solder pots;

[0026] Figure 6 The present invention provides a rear perspective view of the nitrogen protection mechanism in an automatic solder bar adding device for a solder pot.

[0027] Legend: 1. Solder pot; 2. Nitrogen protection mechanism; 201. Nitrogen generator; 202. Connecting pipe; 203. Gas box; 204. Gas outlet; 3. Base; 4. Fixing rod; 5. Support rod; 6. Inclined platform; 7. Connecting plate; 8. PLC control module; 9. Cylinder; 10. Displacement sensor; 11. Solder bar placement slot; 12. Solder bar to be used; 13. Buffer plate; 14. Spring; 15. Rotating rod; 16. Sliding bar; 17. Position control slider; 18. Sliding rod; 19. Solenoid valve. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can also be implemented in other ways than those described herein, and therefore the present invention is not limited to the specific embodiments disclosed in the following specification.

[0030] Example 1, as shown in the attached document Figure 1 , Figure 2 and Figure 3As shown, an automatic solder bar adding device for a solder pot includes a solder pot 1, a fixing rod 4 fixedly connected to the outside of the solder pot 1, a support rod 5 fixedly connected to the inside of the fixing rod 4, a ramp 6 fixedly connected to the top of the support rod 5, a connecting plate 7 fixedly connected to the top of the ramp 6, a PLC control module 8 fixedly connected to the outside of the connecting plate 7, a cylinder 9 fixedly connected to the top of the connecting plate 7, a solder bar placement slot 11 provided on the outside of the cylinder 9, a plurality of unused solder bars 12 provided inside the solder bar placement slot 11, a displacement sensor 10 fixedly connected to the outside of the solder bar placement slot 11, a solenoid valve 19 fixedly connected to the bottom of the ramp 6, a base 3 fixedly connected to the outside of the solder pot 1, and a nitrogen protection mechanism 2 provided on the top of the base 3.

[0031] The effect achieved by the entire embodiment 1 is as follows: because the top of the solder pot 1 is fixed with a ramp 6, the front end of the ramp 6 is designed with a slope to allow the unused solder bar 12 to slide down stably. The PLC control module controls the conduction time of the solenoid valve 19 so that the cylinder 9 can smoothly push the solder bar into the solder pot. The ramp 6 is fixed with a solder bar placement slot 11, and the solder bar placement slot 11 is fixed with a displacement sensor 10. The displacement sensor 10 is located above the solder pot 1 and is kept horizontal. When the liquid level in the pot drops below the set threshold, the displacement sensor 10 sends a signal to the PLC control module. The PLC control module sends a command to the solenoid valve 19, and the solenoid valve 19 conducts to control the cylinder 9 to push the unused solder bar 12 in the solder bar placement slot 11.

[0032] Example 2, as Figure 2 and Figure 4 As shown, it includes a nitrogen generator 201, which is fixedly connected to the top of the base 3. A connecting pipe 202 is connected to the outside of the nitrogen generator 201. A gas box 203 is fixedly connected to the connecting pipe 202. An outlet 204 is connected to the bottom of the gas box 203.

[0033] The effect achieved by the entire embodiment 2 is as follows: the nitrogen generator outputs nitrogen through the connecting pipe 202, the nitrogen reaches the gas box 203 through the connecting pipe 202, the gas box 203 can pressurize the nitrogen to a certain extent and then spray it out from the gas outlet 204. The pressurized nitrogen can form a gas curtain with a long distance by being sprayed out through the specially designed gas outlet 204, which isolates the molten tin from the air.

[0034] Example 3, as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, preferably, the vent of the vent head 204 is opened horizontally along the surface of the molten tin. The connecting pipe 202 is fixedly connected to the tin pot 1. Multiple sliding rods 18 are fixedly connected to the inner side of the tin pot 1. Two sliding bars 16 are slidably connected to the outer side of the multiple sliding rods 18. A control slide plate 17 is fixedly connected to the top of the sliding bar 16. A rotating rod 15 is rotatably connected to the inner side of the sliding bar 16. A spring-loaded spring 14 is provided on the outer side of the rotating rod 15. A buffer plate 13 is fixedly connected to the outer side of the rotating rod 15. The spring-loaded spring 14 is fixedly connected to the buffer plate 13. The other end of the spring-loaded spring 14 is fixedly connected to the sliding bar 16.

[0035] The effect achieved by the entire embodiment 3 is as follows: a sliding bar 16 slides on the fixed sliding rod 18 inside the solder pot 1. The sliding bar 16 is fixed to the buffer plate 13 by the spring 14. When the solder bar falls, it passes through the buffer plate 13. The buffer plate 13 rotates through the rotating rod 15 coated with viscous silicone oil and the sliding bar 16. Therefore, the buffer plate 13 rotates slowly, causing the solder bar to fall slowly into the solder pot 1.

[0036] Example 4, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, multiple spring telescopic sliders are fixed on the control slider 17. The spring telescopic sliders engage with the sliding grooves opened on the inner side of the slide rod 18. A lifting ring is fixed on the control slider 17. Adhesive silicone oil is applied to the part where the rotating rod 15 and the sliding bar 16 rotate. A mounting hole is opened at the top of the fixing rod 4. The inner diameter of the mounting hole is slightly larger than the size of the mounting bolt fixed at the bottom of the support rod 5, and the shape of the mounting hole is consistent with that of the mounting bolt.

[0037] The overall effect of embodiment 4 is as follows: the slide bar 18 and the control slide 17 are engaged by the spring telescopic slider, and the control slide 17 can be pushed and pulled to achieve convenient adjustment. When the adjustment is completed, the spring telescopic slider will automatically engage with the slide bar 18 to improve stability. When special work is performed, pulling the control slide 17 can disengage the slide bar 16 from the slide bar 18, thereby pulling out the buffer plate 13 for flexible use.

[0038] The working principle of the entire device is as follows: When soldering is required, the device is first turned on, the displacement sensor 10 is set as needed, and initial solder is placed into the solder pot 1. Because the top of the solder pot 1 is fixed with an inclined platform 6, and a solder bar placement groove 11 is fixed on the inclined platform 6, and the displacement sensor 10 is fixed on the solder bar placement groove 11, the displacement sensor 10 is positioned above the solder pot 1 and remains horizontal. As the molten solder is used, the liquid level inside the pot will decrease. When it exceeds the set threshold, the displacement sensor 10 sends a signal to the PLC control module. The PLC control module then sends a signal to the solenoid valve. When the PLC control module issues a command, the solenoid valve 19 is activated, controlling the cylinder 9 to push the unused solder bar 12 in the solder bar placement slot 11. At this time, it falls into the solder pot. The PLC control module commands the solenoid valve 19 to retract the cylinder 9, completing the automatic feeding operation. Since there is a sliding strip 16 on the fixed sliding rod 18 inside the solder pot 1, and the sliding strip 16 is fixed to the buffer plate 13 by the spring 14, when the solder bar falls, it passes through the buffer plate 13. The buffer plate 13 rotates through the rotating rod 15 coated with viscous silicone oil and the sliding strip 16. Therefore, the buffer plate 13 rotates slowly, slowly dropping the unused solder bar 12 into the solder pot 1.

[0039] A nitrogen generator 201 is fixed to the outside of the tin pot 1 via a base 3. Nitrogen is transported to a gas concentrator 203 via a specially designed connecting pipe 202. The gas concentrator 203 has a certain pressurization function, which can apply pressure to the incoming nitrogen, increasing its pressure. The pressurized nitrogen is ejected from a specially designed outlet 204. The unique design of the outlet 204 allows the nitrogen to diffuse rapidly when it leaves, thereby forming a long-distance and wide-coverage air curtain that blocks the contact between air and molten tin, effectively inhibiting the oxidation process of tin and reducing the generation of tin dross.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for automatically feeding a tin strip to a tin kettle, characterized in that: The utility model relates to a tin furnace pot, the outside fixed connection of tin furnace pot (1) has fixed rod (4), the inside fixed connection of fixed rod (4) has support rod (5), the top fixed connection of support rod (5) has inclined table (6), the top fixed connection of inclined table (6) has connecting plate (7), the outside fixed connection of connecting plate (7) has PLC control mould box (8), the top fixed connection of connecting plate (7) has pneumatic cylinder (9), the outside of pneumatic cylinder (9) is provided with tin bar placing groove (11), a plurality of standby tin bars (12) are provided in the inside of tin bar placing groove (11), the outside fixed connection of tin bar placing groove (11) has displacement sensor (10), the bottom fixed connection of inclined table (6) has electromagnetic valve (19), the outside fixed connection of tin furnace pot (1) has base (3), the top of base (3) is provided with nitrogen protection mechanism (2).

2. A device for automatically feeding a tin strip to a tin kettle as claimed in claim 1, characterized in that: Including nitrogen generator (201), the nitrogen generator (201) fixed connection is at the top of base (3), the outside of nitrogen generator (201) is communicated with the communicating pipe (202), the communicating pipe (202) is fixedly connected with the gas box (203), the bottom of gas box (203) is communicated with the gas outlet (204).

3. A device for automatically feeding a tin strip to a tin kettle as claimed in claim 2, characterized in that: The gas outlet of gas outlet (204) is along the tin liquid surface transversely set, the communicating pipe (202) is fixedly connected with tin furnace pot (1).

4. The device for automatically feeding tin strip to a tin kettle according to claim 1, wherein: The inside of tin furnace pot (1) is fixedly connected with a plurality of slide rods (18), the outside of a plurality of slide rods (18) is slidably connected with two sliding bars (16).

5. A device for automatically feeding a tin strip to a tin kettle as claimed in claim 4, wherein: The top of sliding bar (16) is fixedly connected with control slide (17), the inside of sliding bar (16) is rotatably connected with rotating rod (15).

6. A device for automatically feeding a tin strip to a tin kettle as defined in claim 5, wherein: The outside of rotating rod (15) is provided with clockwork spring (14), the outside of rotating rod (15) is fixedly connected with buffer plate (13).

7. A device for automatically feeding a tin strip to a tin kettle as claimed in claim 6, characterized in that: Clockwork spring (14) is fixedly connected with buffer plate (13), the other end of clockwork spring (14) is fixedly connected with sliding bar (16).

8. The apparatus for automatically feeding a tin strip to a tin kettle according to claim 5, wherein: A plurality of spring telescopic sliders are fixed on control slide (17), and the spring telescopic sliders are clamped in the sliding grooves formed in the inside of slide rod (18).

9. The apparatus for automatically feeding a tin strip to a tin kettle according to claim 5, wherein: A lifting ring is fixed on control slide (17), and viscous silicon oil is coated on the part where rotating rod (15) and sliding bar (16) rotate.

10. The apparatus for automatically feeding a tin strip to a tin kettle according to claim 1, wherein: The top of fixed rod (4) is provided with a mounting hole, the inner diameter of the mounting hole is slightly larger than the size of the mounting bolt fixed at the bottom of support rod (5), and the mounting hole and the mounting bolt are consistent in shape.

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