Pin tinning machine

Abstract

The utility model provides a kind of tube foot tinning machine, including material belt, rosin pool, tin furnace and robot, the material belt is used for the feeding and discharging of electronic component, the rosin pool is equipped with melted rosin, the tin furnace is used to load molten tin, heating assembly is equipped in the tin furnace, for keeping the tin in the tin furnace in molten state, the working end of the robot is connected with clamping part, for clamping electronic component, preheating assembly and cooling assembly are equipped between the material belt and the rosin pool, since the rosin film with relatively uniform thickness formed on tube foot can form tin layer with uniform thickness on tube foot, tin film is cooled and shaped quickly by cooling assembly, to realize higher tinning quality.

Description

Technical Field

[0001] This utility model belongs to the field of electronic component manufacturing, and specifically relates to a pin tinning machine. Background Technology

[0002] An integrated circuit (IC) is a circuit that integrates a certain number of commonly used electronic components, such as resistors, capacitors, and transistors, along with the interconnections between these components, using semiconductor technology to create a circuit with a specific function. The pins, also called leads, are the connections from the internal circuitry of the IC to the external circuitry. All the pins constitute the interface of the chip. The ends of the leads are soldered to pads on the printed circuit board to form solder joints. In the post-packaging processing of ICs, a metal plating layer with good solderability is typically applied to the surface of the IC pins. This plating layer improves the solderability of the IC pins by increasing the solder contact area, improving solder connectivity, and reducing soldering temperature, thereby ensuring soldering quality and reliability. Currently, when tinning electronic components, the pins are immersed in rosin. After the rosin is removed from the rosin bath, it easily solidifies and cracks on the pins, preventing the rosin from evenly covering the pin surface and affecting the subsequent tinning quality. Utility Model Content

[0003] (1) Technical problems to be solved This invention provides a pin tinning machine, which aims to solve the problem that rosin cannot be evenly covered on the pin surface, thus affecting the subsequent tinning quality.

[0004] (2) Technical solution This utility model provides a pin tin plating machine, including a strip material, a rosin tank, a tin furnace, and a robot. The strip material is used for loading and unloading electronic components. The rosin tank contains molten rosin. The tin furnace is used to load molten tin and is equipped with a heating element to keep the tin in the furnace molten. The working end of the robot is connected to a clamping part for clamping the electronic components. A preheating component and a cooling component are provided between the strip material and the rosin tank. After the robot drives the clamping part to remove the electronic components from the material strip, the electronic components' pins are preheated by the preheating component, then coated with rosin by the rosin bath, then tinned by the tin furnace, and finally cooled by the cooling component before being placed back into the material strip for unloading.

[0005] Preferably, the preheating component includes a housing, a fan, and a heating element. The bottom of the housing is provided with an air inlet, the top of the housing is provided with an air outlet, the fan is installed at the air inlet, and the heating element is installed inside the housing.

[0006] Preferably, the air inlet is provided with a deceleration baffle, and a channel is formed between the deceleration baffle and the air inlet, and the channel is connected to the inside of the housing.

[0007] Preferably, the rosin tank is provided with a dipping trough, and the outside of the rosin tank is provided with a lifting mechanism for realizing the lifting and lowering of the dipping trough. The lifting mechanism includes a lifting drive and a connecting frame. One end of the connecting frame is connected to the output end of the lifting drive and the other end is connected to the dipping trough.

[0008] Preferably, the tin furnace is provided with a tin scraping mechanism, which includes a conveyor and a scraper. The conveyor is used to drive the scraper to scrape off impurities from the surface of the molten tin in the tin furnace. A waste trough is provided on one side of the tin furnace to receive waste scraped out by the tin scraping mechanism.

[0009] Preferably, an exhaust mechanism is provided on one side of the tin furnace. The exhaust mechanism includes a centrifugal fan and a guide shroud. The input end of the guide shroud faces upwards from the tin furnace, and the output end is connected to the centrifugal fan.

[0010] Preferably, the feed strip is provided with a limiting part and a detection photoelectric sensor, and the limiting part and the detection photoelectric sensor form a feeding position.

[0011] Preferably, the feed strip includes a feeding section and a discharging section, the feeding section and the discharging section are independent of each other, and the limiting section and the detection photoelectric device are disposed on the feeding section.

[0012] Preferably, the feeding position is provided with a sorting mechanism, which includes a first clamp, a second clamp, and a horizontal drive. The first clamp is fixed to one side of the feeding position, and the second clamp is disposed on the other side of the feeding position. The horizontal drive drives the second clamp to move towards or away from the first clamp.

[0013] Preferably, the clamping part includes a fixing part, a vibrator, and a gripper. The fixing part is provided with a drive cylinder for driving the gripper to open and close, and the vibrator is used to realize the vibration of the gripper.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In operation, electronic components are input via a strip of material. A robot-driven clamping unit picks up the electronic components from the strip with their leads facing down. The robot-driven clamping unit then drives the electronic components through a preheating assembly to preheat the leads. Next, the robot-driven clamping unit immerses the leads of the electronic components into a rosin bath. Due to the preheating, a relatively uniform rosin film forms on the leads, and the rosin adheres to the leads in a liquid state. The robot then immerses the leads of the electronic components into a tin bath for tin plating. The relatively uniform rosin film on the leads allows for the formation of a uniform tin layer. A cooling assembly quickly cools and sets the tin film, achieving high-quality tin plating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the preheating component of this utility model.

[0017] Figure 3 This is a schematic diagram of the rosin pool of this utility model.

[0018] Figure 4 This is a schematic diagram of the tin furnace of this utility model.

[0019] Figure 5 This is a cross-sectional view of the air extraction mechanism of this utility model.

[0020] Figure 6 This is a schematic diagram of the material strip of this utility model.

[0021] Figure 7 This is a schematic diagram of the clamping part of the present invention. Figure label: Material strip 1, preheating component 11, deceleration baffle 110, housing 111, fan 112, heating element 113, air inlet 114, air outlet 115, channel 116, limiting part 12, detection photoelectric 13, loading position 14, first clamping plate 141, second clamping plate 142, horizontal drive component 143, loading part 15, unloading part 16, rosin tank 2, cooling component 20, dipping tank 21, lifting mechanism 22, lifting drive component 221, connecting frame 222, solder furnace 3, heating component 31, solder scraping mechanism 32, conveying component 321, scraper 322, waste trough 323, exhaust mechanism 33, centrifugal fan 331, guide hood 332, robot 4, clamping part 41, fixing part 411, vibrator 412, gripper 413, drive cylinder. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] like Figures 1-7 As shown, this utility model provides a pin tin plating machine, including a strip 1, a rosin tank 2, a tin furnace 3, and a robot 4. The strip 1 is used for loading and unloading electronic components. The rosin tank 2 contains molten rosin. The tin furnace 3 is used to load molten tin. The tin furnace 3 is equipped with a heating element 31 to keep the tin in the tin furnace 3 in a molten state. The working end of the robot 4 is connected to a clamping part 41 for clamping the electronic components. A preheating element 11 and a cooling element 20 are provided between the strip 1 and the rosin tank 2. After the electronic component is removed from the material strip 1 by the clamping part 41 driven by the robot 4, the electronic component pins are preheated by the preheating component 11, then coated with rosin by the rosin tank 2, then tinned by the tin furnace 3, and finally cooled by the cooling component 20. The electronic component is then put back into the material strip 1 for discharge.

[0024] Furthermore, such as Figures 1-7 As shown, the preheating assembly 11 includes a housing 111, a fan 112, and a heating element 113. The housing 111 has an air inlet 114 at its bottom and an air outlet 115 at its top. The fan 112 is installed at the air inlet 114, and the heating element 113 is installed inside the housing 111. The air inlet 114 is equipped with a speed reduction baffle 110, forming a channel 116 between the speed reduction baffle 110 and the air inlet 114. The channel 116 communicates with the interior of the housing 111.

[0025] Specifically, the robot 4 drives the clamping part 41 to clamp the electronic components on the material strip 1 and move it towards the preheating assembly 11. The heating element 113 heats up inside the box 111, thereby raising the temperature inside the box 111. The fan 112 blows air into the air inlet 114. At this time, the airflow is slowed down by the deceleration baffle 110. The slow airflow blows into the box 111 through the channel 116 and slowly discharges the hot air inside the box 111 to the air outlet 115, and heats the pins of the electronic components, thereby achieving the preheating effect of the pins of the electronic components. It is worth noting that the width of the deceleration baffle 110 is greater than the width of the air inlet 114, so that the inner wall of the deceleration baffle 110 and the inner wall of the air inlet 114 form a channel 116.

[0026] Furthermore, such as Figures 1-7As shown, the rosin tank 2 is provided with a dipping trough 21, and the outside of the rosin tank 2 is provided with a lifting mechanism 22 for realizing the lifting and lowering movement of the dipping trough 21. The lifting mechanism 22 includes a lifting drive component 221 and a connecting frame 222. One end of the connecting frame 222 is connected to the output end of the lifting drive component 221, and the other end is connected to the dipping trough 21.

[0027] Specifically, after the electronic component's pins are preheated, the robot 4 drives the gripping part 41 to move the electronic component towards the rosin tank 2. Simultaneously, the lifting drive 221 drives the connecting frame 222 to rise and float out. At this time, the dipping tank 21 contains a small amount of rosin. The robot 4 drives the gripping part 41 to immerse the electronic component's pins into the rosin in the dipping tank 21. The advantage of this is that, due to the temperature difference within the rosin (usually higher than the surface temperature), the lifting drive 221 drives the connecting frame 222 to immerse the pins in the rosin. Tank 21 holds rosin with a high internal temperature, allowing the rosin pool 2 to reach the pins of electronic components. The rosin with a high temperature comes into contact with the preheated pins, forming a uniform liquid rosin film. After the pins of the electronic components are immersed in the tin bath 3 for tin plating, a uniform tin film can be formed. Conversely, when pins that have not been preheated come into contact with rosin, the rosin will solidify on the surface of the pins, forming a solid rosin shell with several cracks. This will affect the thickness and uniformity of the tin film during tin plating, thus affecting the product quality of the electronic components.

[0028] Furthermore, such as Figures 1-7 As shown, the tin furnace 3 is equipped with a tin scraping mechanism 32, which includes a conveying component 321 and a scraper 322. The conveying component 321 is used to drive the scraper 322 to scrape impurities from the surface of the molten tin inside the tin furnace 3. A waste trough 323 is provided on one side of the tin furnace 3 to receive the waste scraped out by the tin scraping mechanism 32. An exhaust mechanism 33 is provided on one side of the tin furnace 3, which includes a centrifugal fan 331 and a guide shroud 332. The input end of the guide shroud 332 faces upwards from the tin furnace 3, and the output end is connected to the centrifugal fan 331.

[0029] Specifically, after the pins of the electronic component enter the rosin and a uniform liquid rosin film forms on the surface of the pins, the robot 4 drives the clamping part 41 to move the electronic component and immerse the pins of the electronic component into the tin bath 3 for tin plating. After tin plating, the rosin carbonizes at high temperature, forming impurities. The scraper 322 driven by the conveyor 321 scrapes off the carbonized impurities on the surface of the tin bath 3. The waste tank 323 can be used to receive the impurities scraped off by the scraper 322. It is worth noting that before the robot 4 drives the clamping part 41 to immerse the pins of the electronic component into the tin bath 3, a probe moves towards the tin bath 3 and contacts the surface of the molten tin to determine the liquid level of the molten tin. After receiving the height signal, the robot 4 accurately immerses the pins of the electronic component into the tin bath 3.

[0030] In some embodiments, since molten tin may generate harmful exhaust gases, the exhaust gas can be effectively discharged by setting up an exhaust mechanism 33. The guide hood 332 is installed on one side of the tin furnace 3, with the opening of the guide hood 332 facing upwards of the tin furnace 3. The air outlet 115 of the guide hood 332 is connected to the centrifugal fan 331. By drawing air through the centrifugal fan 331, the exhaust gas generated by the molten tin floats upwards of the tin furnace 3 and is then drawn in by the opening of the guide hood 332 and discharged, thus achieving the exhaust effect.

[0031] It is worth noting that a thermocouple can be installed inside the tin furnace 3 to detect the temperature inside the tin furnace 3, and the heating element used in the tin furnace 3 is existing technology, which will not be described in detail here.

[0032] Furthermore, such as Figures 1-7 As shown, the feed strip 1 is provided with a limiting part 12 and a detection photoelectric sensor 13, and a feeding position 14 is formed between the limiting part 12 and the detection photoelectric sensor 13. The feed strip 1 includes a feeding part 15 and a discharging part 16, which are independent of each other. The limiting part 12 and the detection photoelectric sensor 13 are disposed on the feeding part 15. The feeding position 14 is provided with a sorting mechanism, which includes a first clamping piece 141, a second clamping piece 142 and a horizontal driving member 143. The first clamping piece 141 is fixed to one side of the feeding position 14, and the second clamping piece 142 is disposed on the other side of the feeding position 14. The horizontal driving member 143 drives the second clamping piece 142 to move towards or away from the first clamping piece 141.

[0033] Specifically, electronic components are input through the feeding section 15 of the feed belt 1 until they are stopped and abutted by the limiting section 12 of the feeding section 15. The horizontal drive member 143 drives the second clamping plate 142 to push one side of the electronic component until the other side of the electronic component contacts and is positioned by the first clamping plate 141. The robot 4 drives the clamping part 41 to clamp the positioned electronic component. In some embodiments, the clamping part 41 can clamp multiple electronic components simultaneously. The first electronic component, after being transported by the feeding section 15, enters the feeding position 14 and is stopped and abutted by the limiting section 12. After being transported by the loading section 15, the subsequent electronic components enter the loading position 14 and come into contact with the previous electronic component. This continues until the last electronic component enters the loading position 14 and comes into contact with the previous electronic component, and stops in the detection area of ​​the detection photoelectric sensor 13. At this time, the sorting mechanism sorts the electronic components. After receiving the working signal from the main control, the robot 4 clamps the electronic components in the loading position 14. At the same time, the preheating component 11, the rosin tank 2, and the tin furnace 3 are all capable of operating on the pins of multiple electronic components at the same time, so as to achieve the tin plating effect of the pins of electronic components in batches.

[0034] It should be noted that the material belt 1 has frames on both sides for fixing, and the material belt 1 is conveyed between the frames. The first clamp 141, the limiting part 12, and the detection photoelectric device 13 are all fixedly installed on the frames.

[0035] It is worth noting that the aforementioned lifting drive component 221 and horizontal drive component 143 can be cylinders or other linearly driven components, which are existing technologies and will not be described in detail here.

[0036] Furthermore, such as Figures 1-7 As shown, the clamping part 41 includes a fixing part 411, a vibrator 412 and a gripper 413. The fixing part 411 is provided with a driving cylinder for driving the gripper 413 to open and close, and the vibrator 412 is used to realize the vibration of the gripper 413.

[0037] Specifically, the electronic component is clamped by the gripper 413 driven by the drive cylinder. After the pins of the electronic component enter the solder bath 3 for tin plating, there may be excess solder balls remaining on the pins. The gripper 413 is driven by the vibrator 412 to vibrate and shake off the excess solder balls. Then, the electronic component is driven by the robot 4 to enter the cooling component 20 to cool the pins. The cooling component 20 can be a heat exchanger or air cooler, etc., which can achieve the cooling effect. The opening and closing of the gripper 413 driven by the drive cylinder is the prior art and will not be described in detail here.

[0038] The following is a detailed explanation of the working principle of this utility model; In use, electronic components are input through the material strip 1. The robot 4 drives the clamping part 41 to clamp the electronic components on the material strip 1 with the pins facing down. The robot 4 drives the clamping part 41 to drive the electronic components through the preheating component 11 to preheat the pins of the electronic components. Then, the robot 4 drives the clamping part 41 to drive the pins of the electronic components into the rosin bath 2. Since the pins of the electronic components have been preheated, the rosin forms a relatively uniform film on the pins of the electronic components. The rosin is attached to the pins of the electronic components in liquid form. The robot 4 drives the pins of the electronic components to be immersed in the tin bath 3 for tin plating. Since the relatively uniform rosin film formed on the pins can form a uniform tin layer on the pins, the cooling component 20 quickly cools and shapes the tin film to achieve high tin plating quality.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pin tinning machine, characterized in that: The device includes a material strip (1), a rosin tank (2), a tin furnace (3), and a robot (4). The material strip (1) is used for loading and unloading electronic components. The rosin tank (2) contains molten rosin. The tin furnace (3) is used to load molten tin. The tin furnace (3) is equipped with a heating element (31) to keep the tin in the tin furnace (3) in a molten state. The working end of the robot (4) is connected to a clamping part (41) to clamp the electronic components. A preheating element (11) and a cooling element (20) are provided between the material strip (1) and the rosin tank (2). After the robot (4) drives the clamping part (41) to take out the electronic components from the material strip (1), the electronic components are preheated by the preheating component (11), then coated with rosin by the rosin tank (2), and then tinned by the tin furnace (3). After cooling by the cooling component (20), the electronic components are put into the material strip (1) for discharge.

2. The pin tinning machine according to claim 1, characterized in that: The preheating component (11) includes a housing (111), a fan (112), and a heating element (113). The bottom of the housing (111) is provided with an air inlet (114), and the top of the housing (111) is provided with an air outlet (115). The fan (112) is installed in the air inlet (114), and the heating element (113) is installed inside the housing (111).

3. The pin tinning machine according to claim 2, characterized in that: The air inlet (114) is provided with a deceleration baffle (110), and a channel (116) is formed between the deceleration baffle (110) and the air inlet (114), and the channel (116) is connected to the inside of the housing (111).

4. The pin tinning machine according to claim 1, characterized in that: The rosin pool (2) is provided with a dipping trough (21) and a lifting mechanism (22) is provided on the outside of the rosin pool (2) to realize the lifting and lowering of the dipping trough (21). The lifting mechanism (22) includes a lifting drive (221) and a connecting frame (222). One end of the connecting frame (222) is connected to the output end of the lifting drive (221), and the other end is connected to the dipping trough (21).

5. The pin tinning machine according to claim 1, characterized in that: The tin furnace (3) is provided with a tin scraping mechanism (32), which includes a conveyor (321) and a scraper (322). The conveyor (321) is used to drive the scraper (322) to scrape off impurities from the surface of the molten tin in the tin furnace (3). A waste tank (323) is provided on one side of the tin furnace (3) to receive the waste scraped out by the tin scraping mechanism (32).

6. The pin tinning machine according to claim 5, characterized in that: The tin furnace (3) is provided with an exhaust mechanism (33) on one side. The exhaust mechanism (33) includes a centrifugal fan (331) and a guide hood (332). The input end of the guide hood (332) faces the top of the tin furnace (3), and the output end is connected to the centrifugal fan (331).

7. The pin tinning machine according to claim 1, characterized in that: The material strip (1) is provided with a limiting part (12) and a detection photoelectric sensor (13), and a feeding position (14) is formed between the limiting part (12) and the detection photoelectric sensor (13).

8. The pin tinning machine according to claim 7, characterized in that: The material strip (1) includes a feeding section (15) and a discharging section (16). The feeding section (15) and the discharging section (16) are independent of each other. The limiting section (12) and the detection photoelectric device (13) are disposed on the feeding section (15).

9. The pin tinning machine according to claim 7, characterized in that: The loading position (14) is provided with a sorting mechanism, which includes a first clamping piece (141), a second clamping piece (142) and a horizontal drive member (143). The first clamping piece (141) is fixed to one side of the loading position (14), and the second clamping piece (142) is disposed on the other side of the loading position (14). The second clamping piece (142) is driven by the horizontal drive member (143) to move towards or away from the first clamping piece (141).

10. The pin tinning machine according to claim 1, characterized in that: The clamping part (41) includes a fixing part (411), a vibrator (412) and a gripper (413). The fixing part (411) is provided with a driving cylinder for driving the gripper (413) to open and close. The vibrator (412) is used to realize the vibration of the gripper (413).

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