Fuse monorail type lead-free reflow soldering machine

Abstract

The invention provides a fuse monorail type lead-free reflow soldering machine, and relates to the technical field of reflow soldering. A fuze monorail type lead-free reflow soldering machine comprises a reflow soldering cavity, a floor cabinet, a servo motor and a soldering product and further comprises a driving piece, a conveying rail, a product base and a tensioning piece, and the driving piece is arranged at the top of the floor cabinet and used for providing autorotation driving force; the conveying rail is arranged on the driving part and is used for continuously providing a conveying position; the product seat is arranged on the transportation track and is used for providing annular limitation for welding products; the tensioning piece is arranged on the lower portion of the conveying rail and used for tensioning the conveying rail and gathering hot air flow to the welding products. And through the arrangement of the conveying rail and the product base, annular limitation can be provided for the missile fuze product, the stability of the missile fuze product is guaranteed, and the reflow soldering quality is improved.

Description

Technical Field

[0001] This invention relates to the field of reflow soldering technology, specifically to a fuse-type monorail lead-free reflow soldering machine. Background Technology

[0002] With the development of technology, missile fuses have evolved into smaller smart fuses that integrate a variety of electrical components and chips. Therefore, the manufacturing of such fuses requires a welding process, and reflow soldering machines are commonly used welding equipment.

[0003] In related technologies, such as the PCB lead-free reflow soldering machine with announcement number CN221621063U, a base cabinet is included. A reflow soldering cavity is installed on the top of the base cabinet. Side frames are installed on the left and right sides of the reflow soldering cavity. A transport slide rail passes between the two sets of side frames and the reflow soldering cavity. A first hot air plate is installed below the transport slide rail of the reflow soldering cavity. A distance sensor is installed on the right side of the top surface of the first hot air plate. A top frame is installed above the first hot air plate. A second hot air plate is installed at the bottom of the top frame. A temperature sensor is installed on the inner wall of the top frame.

[0004] Commonly used PCB products are usually rectangular. During soldering, the products are placed directly on the surface of the transport track. However, due to the limited installation space of missile fuses, the PCB products need to be circular with a relatively small radius. If circular products are placed directly on the traditional transport track, they are easily blown away by the welding airflow, which cannot guarantee the stable soldering of the missile fuse. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a lead-free reflow soldering machine for fuses on a single rail, which solves the problem that the transport rail cannot guarantee the stable placement of missile fuse products.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fuse-operated monorail lead-free reflow soldering machine, comprising a reflow soldering chamber, a base cabinet, a servo motor, and soldering products, and further comprising: A drive unit, located at the top of the cabinet, is used to provide a self-rotating driving force; A transport track, mounted on a drive unit, is used to continuously provide transport position; Product holder, located on a transport track, is used to provide annular restraint for the welded product; A tensioning element, located at the lower part of the transport track, is used to tension the transport track and direct hot airflow towards the welded product. The transport track and product holder provide annular restraint for the missile fuze product, ensuring its stability and improving the quality of reflow welding.

[0007] Preferably, the driving component includes a drive shaft, on which a sprocket and a positioning wheel are fixedly connected. The positioning wheel is located between the two sprockets and has an inner ring portion in the middle. The drive shaft is fixedly connected to the output end of a servo motor.

[0008] Preferably, the transport track includes a chain, a horizontal bar is fixedly connected to the inner side of the chain, an inner support ring is fixedly connected to the inner side of the horizontal bar, and an inner ring track is fixedly connected to the inner side of the horizontal bar and between two adjacent inner support rings; the chain is adapted to a sprocket, and the inner ring track is adapted to an inner ring portion.

[0009] Preferably, the product base includes a connecting base, the bottom of which is provided with an adapter groove, an installation ring is fixedly connected between two connecting bases, a radial square rail is uniformly fixedly connected to the inner circumference of the installation ring, a limiting seat is slidably connected on the radial square rail, and a spring is fixedly connected between the installation ring and the limiting seat; the connecting base is fixedly connected to the inner ring rail, and the adapter groove is adapted to the placement of the crossbar.

[0010] Preferably, the tensioning component includes a baffle plate and a fixed plate. A connecting frame is fixedly connected to the baffle plate. A tensioning wheel is rotatably connected to the upper part of the connecting frame. A bolt is fixedly connected to the lower part of the connecting frame. The bolt passes through the fixed plate and is threaded with a nut. A guide is provided in the middle of the baffle plate. The guide is used to guide the concentrated hot airflow in the opposite direction. The fixed plate is fixedly connected to the cabinet. The tensioning wheel is adapted to the chain. The tensioning wheel includes a wheel body. Contact bristles are fixedly connected to the circumferential surface of the wheel body.

[0011] Preferably, the guide includes a guide plate fixedly installed in the middle of the baffle plate, the upper surface of the guide plate is a guide arc surface, an oil groove is provided on the outer side of the guide plate, and a contact wheel is rotatably connected to the side of the oil groove near the tail.

[0012] Preferably, the top of the limiting seat is provided with a guide cone.

[0013] Preferably, the contact wheel is provided with a support layer, a sponge layer and a high-temperature resistant layer from the inside out, and the high-temperature resistant layer is provided with contact holes evenly.

[0014] This invention provides a single-rail lead-free reflow soldering machine with a fuze. It has the following advantages: 1. The present invention, through the setting of transport track and product seat, can provide ring-shaped restraint for missile fuse products, ensure the stability of missile fuse products, and improve the quality of reflow soldering.

[0015] 2. The present invention, through the setting of tensioning elements, can ensure that the transport track is in a tensioned state, and can guide the accumulation of hot air flow in the opposite direction to ensure that the fuse product is fully preheated.

[0016] 3. The present invention, through the design of the driving component, can provide a stable driving force for the transport track, and is not prone to slippage, ensuring a secure drive. Attached Figure Description

[0017] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a perspective view of the driving component of the present invention; Figure 3 This is a partial perspective view of the transport track of the present invention; Figure 4 This is a schematic diagram of the tensioning component of the present invention; Figure 5 This is a partial structural schematic diagram of the tensioning element of the present invention; Figure 6 This is a side view of the present invention; Figure 7 This is a perspective view of the product base of the present invention; Figure 8 This is a perspective view of the limiting seat of the present invention; Figure 9 This is a schematic diagram of the contact wheel of the present invention; Figure 10 This is a perspective view of the contact state between the tension wheel and the chain according to the present invention.

[0018] The components include: 1. Reflow soldering cavity; 2. Base cabinet; 3. Servo motor; 4. Welded product; 5. Drive component; 6. Product base; 7. Transport track; 8. Tensioner; 501. Drive shaft; 502. Sprocket; 503. Positioning wheel; 504. Inner ring; 601. Connecting seat; 602. Adapter groove; 603. Mounting ring; 604. Radial square rail; 605. Spring; 606. Limiting seat; 6061. Guide cone; 701. Chain; 7 02. Inner support ring; 703. Placement crossbar; 704. Inner ring track; 801. Baffle plate; 802. Guide plate; 803. Guide arc surface; 804. Contact wheel; 805. Fixing plate; 806. Connecting frame; 807. Tensioning wheel; 8071. Wheel body; 8072. Contact bristles; 808. Bolt; 809. Nut; 8041. Support layer; 8042. Sponge layer; 8043. High temperature resistant layer; 8044. Contact hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-10 As shown, this embodiment of the invention provides a fuse-type monorail lead-free reflow soldering machine, including a reflow soldering chamber 1, a base cabinet 2, a servo motor 3, and a soldering product 4; refer to Figure 1 The reflow oven 1 is used to provide the temperature required for welding and to extract the gas generated during the welding process. It is equipped with an alarm light, a control computer (not shown), and a display (not shown). The base cabinet 2 is used to provide support for the whole and provide the space required for component installation. The welded product 4 is a missile fuse product, which is shaped like a disc.

[0021] Also includes: The drive component 5 is located on the top of the cabinet 2 and is used to provide the self-rotation driving force. The drive component 5 includes a drive shaft 501, on which a sprocket 502 and a positioning wheel 503 are fixedly connected. The positioning wheel 503 is located between the two sprockets 502 and has an inner ring portion 504 in the middle. The drive shaft 501 is fixedly connected to the output end of the servo motor 3. refer to Figure 1 , Figure 2 The drive unit 5 can rotate synchronously under the drive of the output end of the servo motor 3, providing the power required for transportation: the surface of the inner ring 504 is provided with anti-slip texture to improve the stability of the positioning wheel 503 drive.

[0022] The transport track 7 is mounted on the drive unit 5 and is used to continuously provide transport position. The transport track 7 includes a chain 701, a crossbar 703 is fixedly connected to the inner side of the chain 701, an inner support ring 702 is fixedly connected to the inner side of the crossbar 703, and an inner ring track 704 is fixedly connected to the inner side of the crossbar 703 and between two adjacent inner support rings 702. The chain 701 is adapted to the sprocket 502, and the inner ring track 704 is adapted to the inner ring portion 504. refer to Figure 1 , Figure 3 The chain 701 can be driven by the sprocket 502, and the inner ring track 704 can be driven by the inner ring part 504, thereby driving multiple placement crossbars 703 and inner support rings 702 to move, realizing the function of transporting the welded product 4. Among them, the placement crossbars 703, inner support rings 702 and inner ring track 704 are all made of high temperature resistant materials to adapt to the high temperature in the welding process.

[0023] Product seat 6, located on transport track 7, provides annular constraint for welded product 4. Product seat 6 includes connecting seat 601, with an adapter groove 602 at the bottom. A mounting ring 603 is fixedly connected between two connecting seats 601. Radial square rails 604 are uniformly fixedly connected to the inner circumference of the mounting ring 603. A limiting seat 606 is slidably connected to the radial square rails 604. A guide cone 6061 is provided at the top of the limiting seat 606. A spring 605 is fixedly connected between the mounting ring 603 and the limiting seat 606. Connecting seat 601 is fixedly connected to inner ring track 704, and adapter groove 602 is adapted to placement crossbar 703. refer to Figure 1 , Figure 7 , Figure 8 When placing the welding product 4, simply place it from top to bottom within the circular space enclosed by multiple limiting seats 606. During placement, the welding product 4 will contact the guide cone 6061, pushing the limiting seat 606 to move outward along the radial square rail 604. The spring 605 is compressed, and the resulting elastic force provides a limiting force to the welding product 4 from the outer ring to the inner ring, ensuring the stability of the welding product 4. This method is suitable for welding circular missile fuses with small radii.

[0024] Tensioning element 8 is located at the lower part of transport track 7 and is used to tension transport track 7 and concentrate hot airflow towards welding product 4. Tensioning element 8 includes a baffle plate 801 and a fixed plate 805. A connecting frame 806 is fixedly connected to the baffle plate 801. A tensioning wheel 807 is rotatably connected to the upper part of the connecting frame 806. A bolt 808 is fixedly connected to the lower part of the connecting frame 806. The bolt 808 passes through the fixed plate 805 and is threaded with a nut 809. A guide is provided in the middle of the baffle plate 801. The guide is used to guide the concentrated hot airflow in the opposite direction. The fixed plate 805 is fixedly connected to the base cabinet 2. The tensioning wheel 807 is adapted to the chain 701. The tensioning wheel 807 includes a wheel body 8071. Contact bristles 8072 are fixedly connected to the circumferential surface of the wheel body 8071. refer to Figure 1 , Figure 6 , Figure 4 , Figure 5 , Figure 9 , Figure 10 During tensioning, on the one hand, the overall weight of the tensioning component 8 is transmitted to the chain 701 through the connecting frame 806 and the tensioning wheel 807, so that the chain 701 is in a tensioned state. On the other hand, by turning the position of the bolt 808, the bolt 808 is moved down, thereby driving the connecting frame 806 and the tensioning wheel 807 to move down, providing sufficient and stable tension force for the tensioned state, ensuring the stability of the chain 701, and thus ensuring the stability of the transportation process. In addition, the contact bristles 8072 on the circumferential surface of the tensioner 807's wheel body 8071 extend into the gap of the chain 701, adhering the lubricating oil adhering to the lower part of the chain 701 to the surface of the contact bristles 8072. During rotation, the contact bristles 8072 will contact the upper part of the chain 701, playing a role in evenly spreading the lubricating oil. This works in conjunction with the contact wheel 804 to form a good lubrication and maintenance operation. To ensure the continuity of the spreading function, the contact bristles 8072 can be evenly arranged circumferentially. To ensure that the contact bristles 8072 can contact the lower part of the chain 701, the length of the contact bristles 8072 can reach the lower part of the chain 701, and the contact bristles 8072 are shaped with a smaller upper part and a larger lower part, ensuring that the contact bristles 8072 can fully contact the lubricating oil.

[0025] The guide includes a guide plate 802 fixedly installed in the middle of the baffle plate 801. The upper surface of the guide plate 802 is a guide arc surface 803. An oil groove is provided on the outer side of the guide plate 802. A contact wheel 804 is rotatably connected to the side of the oil groove near the tail. The contact wheel 804 is provided with a support layer 8041, a sponge layer 8042, and a high-temperature resistant layer 8043 from the inside to the outside. The high-temperature resistant layer 8043 is provided with contact holes 8044 evenly distributed. refer to Figure 1 , Figure 6 , Figure 4 , Figure 5 , Figure 9 In terms of lubrication, the chain 701 moves in contact with the outer surface of the contact wheel 804, causing the contact wheel 804 to rotate. The sponge layer 8042 in the contact wheel 804 can absorb the high-temperature resistant lubricating oil entering from the bottom contact hole 8044. When the upper part of the contact wheel 804 is contacted and squeezed by the chain 701, the high-temperature resistant lubricating oil in the sponge layer 8042 will adhere to the surface of the chain 701 through the top contact hole 8044. The contact hole 8044 will limit the amount of high-temperature resistant lubricating oil in contact, avoid excessive adhesion of high-temperature resistant lubricating oil, prevent pollution of the welding environment, and improve the accuracy of lubrication. The contact wheel 804 is close to the cooling section, so the high temperature generated by welding will not affect its normal operation.

[0026] Working principle: When in use, the welding product 4 is placed from top to bottom in the circular space formed by multiple limiting seats 606. The welding product 4 will contact the guide cone 6061, pushing the limiting seat 606 to move outward along the radial square rail 604. The spring 605 is compressed, and the elastic force generated provides a limiting force for the welding product 4 from the outer ring to the inner ring, ensuring the stability of the welding product 4. Servo motor 3 drives drive shaft 501 to rotate, drive shaft 501 drives sprocket 502 and positioning wheel 503 to rotate, sprocket 502 drives chain 701, and positioning wheel 503 drives inner track 704 through inner ring part 504 to realize the function of providing driving force; This causes the product holder 6 and the welding product 4 to move, thus entering the reflow soldering cavity 1 for welding operations. During lubrication maintenance, the chain 701 moves and comes into contact with the outer surface of the contact wheel 804, causing the contact wheel 804 to rotate. The sponge layer 8042 in the contact wheel 804 can absorb the high-temperature resistant lubricating oil that enters from the bottom contact hole 8044. When the upper part of the contact wheel 804 is contacted and squeezed by the chain 701, the high-temperature resistant lubricating oil in the sponge layer 8042 will adhere to the surface of the chain 701 through the top contact hole 8044. The contact hole 8044 will limit the amount of high-temperature resistant lubricating oil in contact, thus preventing excessive adhesion of high-temperature resistant lubricating oil. During tensioning maintenance, the overall weight of the tensioning component 8 is transmitted to the chain 701 through the connecting frame 806 and the tensioning wheel 807, keeping the chain 701 in a tensioned state. At the same time, by turning the position of the bolt 808, the bolt 808 is moved downward, thereby driving the connecting frame 806 and the tensioning wheel 807 to move downward, providing sufficient and stable tension force for the tensioned state, ensuring the stability of the chain 701, and thus ensuring the stability of the transportation process.

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

Claims

1. A single-track lead-free reflow soldering machine for fuzes, comprising a reflow soldering cavity (1), a ground cabinet (2), a servo motor (3), and a soldering product (4), characterized in that, Also include: Driving piece (5), the driving piece (5) is located at the top of the floor cabinet (2), for providing the driving force of rotation; Transportation track (7), the transportation track (7) is arranged on the driving piece (5), for continuously providing the transportation position; Product seat (6), the product seat (6) is arranged on the transportation track (7), for providing annular restriction for the welding product (4);The product seat (6) includes connecting seat (601), the bottom of the connecting seat (601) is provided with an adapter slot (602), two connecting seats (601) are fixedly connected with mounting ring (603), the inner circumference of the mounting ring (603) is uniformly fixedly connected with radial square rail (604), the radial square rail (604) is slidably connected with limiting seat (606), the mounting ring (603) and the limiting seat (606) are fixedly connected with spring (605); Tensioning member (8), the tensioning member (8) is arranged at the lower part of the transportation track (7), for tensioning the transportation track (7) and gathering hot air flow to the welding product (4).

2. The single-rail lead-free reflow soldering machine for fuzes according to claim 1, characterized in that: The driving piece (5) includes a drive shaft (501), the drive shaft (501) is fixedly connected with a sprocket (502) and a positioning wheel (503), the positioning wheel (503) is located between the two sprockets (502), and the middle part of the positioning wheel (503) is provided with an inner ring part (504);The drive shaft (501) is fixedly connected with the output end of the servo motor (3).

3. The single-rail lead-free reflow soldering machine for fuzes according to claim 2, characterized in that: The transportation track (7) includes a chain (701), the inner side of the chain (701) is fixedly connected with a placing cross bar (703), the inner side of the placing cross bar (703) is fixedly connected with an inner support ring bar (702), and the inner side of the placing cross bar (703) and between the adjacent two inner support ring bars (702) is fixedly connected with an inner ring track (704);The chain (701) is adapted with the sprocket (502), and the inner ring track (704) is adapted with the inner ring part (504).

4. The single-rail lead-free reflow soldering machine for fuzes according to claim 3, characterized in that: The connecting seat (601) is fixedly connected with the inner ring track (704), and the adapter slot (602) is adapted with the placing cross bar (703).

5. The single-rail lead-free reflow soldering machine for fuzes according to claim 3, characterized in that: The tensioning member (8) includes a blocking plate (801), a fixed plate (805), the blocking plate (801) is fixedly connected with a connecting frame (806), the upper part of the connecting frame (806) is rotatably connected with a tensioning wheel (807), the lower part of the connecting frame (806) is fixedly connected with a bolt (808), the bolt (808) passes through the fixed plate (805) and is threadedly connected with a nut (809), the middle part of the blocking plate (801) is provided with a guide, and the guide is used for guiding the gathered hot air flow in reverse;The fixed plate (805) is fixedly connected with the floor cabinet (2), and the tensioning wheel (807) is adapted with the chain (701);The tensioning wheel (807) includes a wheel body (8071), and the circumferential surface of the wheel body (8071) is fixedly connected with a contact brush (8072).

6. The single-rail lead-free reflow soldering machine for fuzes according to claim 5, characterized in that: The guide comprises a guide plate (802) fixedly installed at the middle part of the blocking plate (801), the upper surface of the guide plate (802) is a guide camber (803), and the outer side of the guide plate (802) is provided with an oil groove, and a contact wheel (804) is rotationally connected to the side close to the tail of the oil groove.

7. The single-rail lead-free reflow soldering machine for fuzes according to claim 4, characterized in that: The top of the limiting seat (606) is provided with a guide cone (6061).

8. The single-rail lead-free reflow soldering machine for fuzes according to claim 6, characterized in that: The contact wheel (804) is sequentially provided with a support layer (8041), a sponge layer (8042) and a high-temperature-resistant layer (8043) from inside to outside, and the high-temperature-resistant layer (8043) is uniformly provided with contact holes (8044).

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