A single-track lead-free reflow soldering machine for fuze

Abstract

The application provides a single-track lead-free reflow soldering machine for fuzes, and relates to the technical field of reflow soldering.A single-track lead-free reflow soldering machine for fuzes comprises a reflow soldering cavity, a ground cabinet, a servo motor, a soldering product, and further comprises a driving part, a transportation track, a product seat and a tensioning part.The driving part is arranged on the top of the ground cabinet and is used for providing a self-rotation driving force.The transportation track is arranged on the driving part and is used for continuously providing a transportation position.The product seat is arranged on the transportation track and is used for providing annular limitation for the soldering product.The tensioning part is arranged on the lower part of the transportation track and is used for tensioning the transportation track and gathering hot air flow to the soldering product.Through the arranged transportation track and product seat, annular limitation can be provided for the missile fuze product, the stability of the missile fuze product is ensured, and the quality of the reflow soldering is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reflow soldering, in particular to a single-track lead-free reflow soldering machine for fuze. BACKGROUND

[0002] With the development of technology, the missile fuze has developed into a smaller intelligent fuze, which integrates various electrical components and chips. Therefore, during the processing of such a fuze, a welding process is required, and a reflow soldering machine is a commonly used welding machine.

[0003] In the related art, a PCB circuit board lead-free reflow soldering machine with the announcement number CN221621063U includes a ground cabinet, a reflow soldering cavity is installed on the top of the ground cabinet, side frames are installed on the left and right sides of the reflow soldering cavity, a transport rail passes between the two groups of side frames and the reflow soldering cavity, a first hot baking plate is installed below the transport rail of the reflow soldering cavity, a distance measuring sensor is installed on the top surface of the right side of the first hot baking plate, a top frame is installed above the first hot baking plate, a second hot baking plate is installed on the bottom of the top frame, and a temperature sensor is installed on the inner wall of the top frame.

[0004] Common PCB products are usually rectangular, and during welding, the product is directly placed on the surface of the transport rail. However, due to the limitation of the installation space of the missile fuze, the PCB product needs to be designed as a circular product with a relatively small radius. The circular product is directly placed on the traditional transport rail and is easily blown by the welding airflow, which cannot guarantee the stable welding of the missile fuze. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a single-track lead-free reflow soldering machine for fuze, which solves the problem that the transport rail cannot guarantee the stable placement of the missile fuze product.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: a single-track lead-free reflow soldering machine for fuze, including a reflow soldering cavity, a ground cabinet, a servo motor, a welding product, and further comprising:

[0007] A driving member is arranged on the top of the ground cabinet to provide self-rotation driving force;

[0008] A transport rail is arranged on the driving member to continuously provide a transport position;

[0009] A product seat is arranged on the transport rail to provide annular restriction for the welding product;

[0010] A tensioning member is arranged at the lower part of the transport rail to tension the transport rail and gather hot airflow to the welding product. By arranging the transport rail and the product seat, annular restriction can be provided for the missile fuze product to ensure the stability of the missile fuze product and improve the quality of reflow soldering.

[0011] Preferably, the driving member comprises a driving shaft, a sprocket and a positioning wheel are fixedly connected to the driving shaft, the positioning wheel is located between the two sprockets, and an inner ring part is arranged at the middle part of the positioning wheel; the driving shaft is fixedly connected to the output end of the servo motor.

[0012] Preferably, the transport track comprises a chain, a placing cross bar is fixedly connected to the inner side of the chain, an inner supporting ring bar is fixedly connected to the inner side of the placing cross bar, and an inner ring track is fixedly connected to the inner side of the placing cross bar and located between adjacent two inner supporting ring bars; the chain is matched with the sprocket, and the inner ring track is matched with the inner ring part.

[0013] Preferably, the product seat comprises a connecting seat, an adaptive groove is arranged at the bottom of the connecting seat, a mounting ring is fixedly connected between two connecting seats, radial square rails are uniformly fixedly connected to the inner periphery of the mounting ring, a limiting seat is slidably connected to the radial square rails, and springs are fixedly connected between the mounting ring and the limiting seat; the connecting seat is fixedly connected with the inner ring track, and the adaptive groove is matched with the placing cross bar.

[0014] Preferably, the tensioning member comprises a blocking plate and a fixed plate, a connecting frame is fixedly connected to the blocking 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 penetrates through the fixed plate and is threadedly connected with a nut, a guide part is arranged at the middle part of the blocking plate, and the guide part is used for reversely guiding the gathered hot air flow; the fixed plate is fixedly connected with the floor cabinet, and the tensioning wheel is matched with the chain; the tensioning wheel comprises a wheel body, and contact bristles are fixedly connected to the circumferential surface of the wheel body.

[0015] Preferably, the guide part comprises a guide plate fixedly installed at the middle part of the blocking plate, the upper surface of the guide plate is a guide arc surface, an oil groove is arranged at the outer side of the guide plate, and a contact wheel is rotatably connected to one side of the oil groove close to the tail part.

[0016] Preferably, a guide cone part is arranged at the top of the limiting seat.

[0017] Preferably, the contact wheel is sequentially provided with a supporting layer, a sponge layer and a high-temperature-resistant layer from inside to outside, and contact holes are uniformly arranged on the high-temperature-resistant layer.

[0018] The present application provides a single-track lead-free reflow soldering machine for fuses. It has the following advantages:

[0019] 1、The transport track and the product seat provided by the present application can provide circular limitation for missile fuse products, ensure the stability of the missile fuse products, and improve the quality of reflow soldering.

[0020] 2、The tensioning piece is arranged, the transportation track can be guaranteed to be in the tensioning state, the gathered hot air flow can be reversely guided, and the fuze product preheating is guaranteed to be sufficient.

[0021] 3、The driving piece is arranged, the transportation track can be provided with stable driving force, is not prone to skidding, and is firmly driven. ACCOMPANYING DRAWINGS

[0022] Figure 1 It is the overall perspective view of the application;

[0023] Figure 2 It is the perspective view of the driving piece of the application;

[0024] Figure 3 It is the partial perspective view of the transportation track of the application;

[0025] Figure 4 It is the structural schematic view of the tensioning piece of the application;

[0026] Figure 5 It is the partial structural schematic view of the tensioning piece of the application;

[0027] Figure 6 It is the side view of the application;

[0028] Figure 7 It is the perspective view of the product seat of the application;

[0029] Figure 8 It is the perspective view of the limiting seat of the application;

[0030] Figure 9 It is the structural schematic view of the contact wheel of the application;

[0031] Figure 10 It is the perspective view of the tensioning wheel and chain contact state of the application.

[0032] Wherein, 1, reflow soldering cavity; 2, base cabinet; 3, servo motor; 4, welding product; 5, driving piece; 6, product seat; 7, transportation track; 8, tensioning piece; 501, driving shaft; 502, sprocket; 503, positioning wheel; 504, inner ring part; 601, connecting seat; 602, adaptive slot; 603, mounting ring; 604, radial square rail; 605, spring; 606, limiting seat; 6061, guide cone part; 701, chain; 702, inner support ring strip; 703, placement cross strip; 704, inner ring track; 801, blocking plate; 802, guide plate; 803, guide camber; 804, contact wheel; 805, fixed 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 DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] As Figures 1-10 shown, the present application provides a single-track lead-free reflow soldering machine for fuze, which comprises a reflow soldering cavity 1, a base cabinet 2, a servo motor 3, and a welding product 4.

[0035] Referring to Figure 1 , the reflow soldering cavity 1 is used to provide the temperature required for welding and to extract the gas generated during the welding process, and is provided with an alarm lamp, a control computer (not shown), and a display (not shown); the base cabinet 2 is used to provide support force for the whole machine and to provide space required for component installation; and the welding product 4 is a missile fuze product, which is in the shape of a round cake.

[0036] Further comprising:

[0037] The driving piece 5 is arranged on the top of the base cabinet 2 and is used to provide self-rotation driving force; the driving piece 5 comprises a driving shaft 501, a sprocket 502, and a positioning wheel 503 fixedly connected to the driving shaft 501, and the positioning wheel 503 is located between the two sprockets 502 and is provided with an inner ring part 504 in the middle part thereof; and the driving shaft 501 is fixedly connected to the output end of the servo motor 3.

[0038] Referring to Figure 1 , Figure 2The driving member 5 can synchronously rotate as a whole under the driving of the output end of the servo motor 3, thereby providing the power required for transportation. The surface of the inner ring part 504 is provided with anti-skid patterns, thereby improving the stability of the driving of the positioning wheel 503.

[0039] The transportation track 7 is arranged on the driving member 5 and is used for continuously providing the transportation position. The transportation track 7 comprises 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 supporting ring bar 702, and the inner side of the placing cross bar 703 and between the adjacent two inner supporting ring bars 702 is fixedly connected with an inner ring track 704. The chain 701 is matched with the sprocket 502, and the inner ring track 704 is matched with the inner ring part 504.

[0040] Referring to Figure 1 , Figure 3 The chain 701 can be driven by the sprocket 702, and the inner ring track 704 can be driven by the inner ring part 504, thereby driving the plurality of placing cross bars 703 and inner supporting ring bars 702 to move, thereby realizing the function of transporting the welded product 4. The placing cross bar 703, the inner supporting ring bar 702 and the inner ring track 704 are all made of high-temperature-resistant materials, so as to adapt to the high temperature in the welding process.

[0041] The product seat 6 is arranged on the transportation track 7 and is used for providing the annular limitation for the welded product 4. The product seat 6 comprises a connecting seat 601, the bottom of the connecting seat 601 is provided with an adaptive groove 602, two connecting seats 601 are fixedly connected with a mounting ring 603, the inner circumference of the mounting ring 603 is uniformly fixedly connected with a radial square rail 604, the radial square rail 604 is slidingly connected with a limiting seat 606, the top of the limiting seat 606 is provided with a guide cone part 6061, and the mounting ring 603 and the limiting seat 606 are fixedly connected with a spring 605. The connecting seat 601 is fixedly connected with the inner ring track 704, and the adaptive groove 602 is matched with the placing cross bar 703.

[0042] Referring to Figure 1 , Figure 7 , Figure 8 When the welded product 4 is placed, the welded product 4 can be placed in the circular space surrounded by the plurality of limiting seats 606 from top to bottom. When the welded product 4 is placed, the welded product 4 will contact the guide cone part 6061, push the limiting seat 606 to move outward along the radial square rail 604, and the spring 605 is compressed. The elastic force generated by the spring 605 provides the limiting force for the welded product 4 from the outer ring to the inner ring, thereby ensuring the stability of the welded product 4 and being suitable for the welding operation of the missile fuze which is circular and has a small radius.

[0043] The tensioning piece 8 is arranged at the lower part of the conveying track 7 and is used for tensioning the conveying track 7 and gathering the hot air flow to the welding product 4. The tensioning piece 8 comprises a blocking plate 801 and 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 penetrates 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 piece. The guide piece is used for reversely guiding the gathered hot air flow. The fixed plate 805 is fixedly connected with the ground cabinet 2. The tensioning wheel 807 is matched with the chain 701. The tensioning wheel 807 comprises a wheel body 8071. The circumferential surface of the wheel body 8071 is fixedly connected with contact bristles 8072.

[0044] Reference Figure 1 、 Figure 6 、 Figure 4 、 Figure 5 、 Figure 9 、 Figure 10 When the tensioning operation is performed, on the one hand, the gravity of the whole tensioning piece 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 tensioning state. On the other hand, by rotating the position of the bolt 808, the bolt 808 is moved downward, so as to drive the connecting frame 806 and the tensioning wheel 807 to move downward, thereby providing sufficient and stable tensioning force for the tensioning state, ensuring the stability of the chain 701, and thus ensuring the stability of the conveying process.

[0045] In addition, the contact bristles 8072 on the circumferential surface of the wheel body 8071 of the tensioning wheel 807 can extend into the gap of the chain 701, so as to adhere the lubricating oil adhered to the lower part of the chain 701 to the surface of the contact bristles 8072. The contact bristles 8072 can contact the upper part of the chain 701 in the process of rotation, thereby playing a role of uniformly applying the lubricating oil. The contact bristles 8072 are matched with the contact wheel 804, thereby forming a good lubricating and maintaining operation. In order to ensure the continuity of the application function, the contact bristles 8072 can be uniformly arranged in the circumferences. In order 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. In addition, the contact bristles 8072 are in a shape that the upper part is small and the lower part is large, thereby ensuring that the contact bristles 8072 can fully contact the lubricating oil.

[0046] The guide piece 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 arc surface 803. The outer side of the guide plate 802 is provided with an oil groove. An oil groove is rotatably connected with a contact wheel 804 at the side close to the tail of the oil groove. The contact wheel 804 comprises a supporting layer 8041, a sponge layer 8042 and a high-temperature-resistant layer 8043 from inside to outside. The high-temperature-resistant layer 8043 is uniformly provided with contact holes 8044.

[0047] Reference Figure 1 ,Figure 6 、 Figure 4 、 Figure 5 、 Figure 9 , Lubrication, due to the mutual contact between the movement of the chain 701 and the outer surface of the contact wheel 804, the contact wheel 804 will 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 extruded 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, and the contact hole 8044 will limit the contact amount of the high-temperature-resistant lubricating oil, avoiding too much adhesion of the high-temperature-resistant lubricating oil, causing pollution to the welding environment, and improving 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 work.

[0048] Working principle: when in use, the welding product 4 is placed in the circular space surrounded by the plurality of limiting seats 606 from top to bottom, the welding product 4 will contact the guide cone part 6061, push the limiting seat 606 to move outward along the radial square rail 604, the spring 605 is compressed, and the elastic force generated thereby 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;

[0049] The servo motor 3 drives the driving shaft 501 to rotate, the driving shaft 501 drives the sprocket 502 and the positioning wheel 503 to rotate, the sprocket 502 drives the chain 701, and the positioning wheel 503 drives the inner ring track 704 through the inner ring part 504, realizing the function of providing driving force;

[0050] Thus driving the product seat 6 and the welding product 4 to move, so as to enter the reflow soldering cavity 1 to perform welding work;

[0051] When lubricating, due to the mutual contact between the movement of the chain 701 and the outer surface of the contact wheel 804, the contact wheel 804 will 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 extruded 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, and the contact hole 8044 will limit the contact amount of the high-temperature-resistant lubricating oil, avoiding too much adhesion of the high-temperature-resistant lubricating oil;

[0052] When the tensioning operation is maintained, the gravity of the tensioning piece 8 as a whole will be transmitted to the chain 701 through the connecting frame 806 and the tensioning wheel 807, so that the chain 701 is in a tensioning state, at the same time, by screwing the position of the bolt 808, the bolt 808 is lowered, thereby driving the connecting frame 806 and the tensioning wheel 807 to move downward, providing sufficient and stable tensioning force for the tensioning state, ensuring the stability of the chain 701, and thus ensuring the stability of the transportation process.

[0053] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes, modifications, substitutions and variations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A fuse-operated monorail lead-free reflow soldering machine, comprising a reflow soldering chamber (1), a base cabinet (2), a servo motor (3), and soldered products (4), characterized in that, Also includes: A drive unit (5) is located on the top of the cabinet (2) and is used to provide a self-rotating drive force; The transport track (7) is mounted on the drive unit (5) and is used to continuously provide transport position; Product base (6), the product base (6) is disposed on transport track (7) for providing annular restriction for welding product (4); the product base (6) includes connecting base (601), the bottom of the connecting base (601) is provided with adapter groove (602), the two connecting bases (601) are fixedly connected to an mounting ring (603), the inner circumference of the mounting ring (603) is uniformly fixedly connected to a radial square rail (604), the radial square rail (604) is slidably connected to a limiting seat (606), and a spring (605) is fixedly connected between the mounting ring (603) and the limiting seat (606); Tensioning member (8), which is located at the lower part of transport track (7) and is used to tension transport track (7) and gather hot airflow toward welding product (4); the tensioning member (8) includes a baffle plate (801) and a fixing 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 fixing 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 gathered hot airflow in the opposite direction.

2. The lead-free reflow soldering machine with a fuze monorail as described in claim 1, characterized in that: The driving component (5) includes a driving 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 the center of the positioning wheel (503) is provided with an inner ring (504). The driving shaft (501) is fixedly connected to the output end of the servo motor (3).

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

4. A single-rail lead-free reflow soldering machine with a fuze according to claim 3, characterized in that: The connecting seat (601) is fixedly connected to the inner ring track (704), and the adapter groove (602) is adapted to the placement crossbar (703).

5. A single-rail lead-free reflow soldering machine with a fuze according to claim 3, characterized in that: The fixing plate (805) is fixedly connected to the cabinet (2), and the tension wheel (807) is adapted to the chain (701); the tension wheel (807) includes a wheel body (8071), and contact bristles (8072) are fixedly connected to the circumferential surface of the wheel body (8071).

6. A single-rail lead-free reflow soldering machine with a fuze according to claim 5, characterized in that: 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.

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

8. A single-rail lead-free reflow soldering machine with a fuze according to claim 6, characterized in that: 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.

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