A PCB automatic reflow equipment

Abstract

This invention discloses an automatic PCB reflow soldering device, including a device support and an upper board assembly, an upper rack assembly, a reflow oven, an lower rack assembly, a conveyor track, and a return track, all mounted on the device support. The discharge end of the upper rack track and the feed end of the lower rack assembly are respectively connected to the two ends of the conveyor track. The conveyor track passes through the reflow oven. The return track connects the feed end of the upper rack track and the discharge end of the lower rack track. The upper board assembly is located on one side of the discharge end of the upper rack assembly. The upper board assembly includes two push assemblies, a first lead screw, a push bar, and a servo motor. The movable end of the servo motor is connected to the first lead screw, which is placed horizontally. One side of the push bar is drivenly connected to the first lead screw, and the two push assemblies are respectively fixed to the two ends of the other side of the push bar. This automatic PCB reflow soldering device can automatically and quickly push PCBs into the reflow oven for reflow soldering, with a high degree of automation, high efficiency, and a compact structure.

Description

Technical Field

[0001] The present invention relates to the technical field of surface mounting technology, and in particular to a PCB automatic reflow device. Background Art

[0002] Surface mount technology, or SMT (abbreviation for Surface Mounted Technology), is the most popular technology and process in the current electronic assembly industry. It includes an important step: reflow soldering, which melts the solder paste to firmly bond the surface mounted components to the printed circuit board (PCB). The equipment used is a reflow oven, which is located behind the placement machine in the SMT production line.

[0003] In current production, the PCB coming out of the placement machine is directly put into the reflow furnace for reflow. There is no structure to fix the PCB, and it is easy for unsoldered parts to be touched during manual operation, resulting in part misalignment. Summary of the invention

[0004] An object of the present invention is to provide a PCB automatic reflow device, which can automatically and quickly push the PCB into a reflow furnace for reflow, has a high degree of automation, high efficiency and a compact structure.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A PCB automatic reflow device comprises an equipment support and an upper plate assembly, an upper frame assembly, a reflow furnace, a lower frame assembly, a conveying track and a return track arranged on the equipment support, wherein the discharge end of the upper frame track and the feed end of the lower frame assembly are respectively connected to the two ends of the conveying track, the conveying track runs through the reflow furnace, the return track connects the feed end of the upper frame track and the discharge end of the lower frame track, the upper plate assembly is located on one side of the discharge end of the upper frame assembly, the upper plate assembly comprises two pushing assemblies, a first lead screw, a pushing bar and a servo motor, the movable end of the servo motor is connected to the first lead screw, the first lead screw is placed in the horizontal direction, one side of the pushing bar is transmission-connected to the first lead screw, and the two pushing assemblies are respectively fixed to the two ends of the other side of the pushing bar.

[0007] As a preferred technical solution, a plurality of pushing holes are provided on the pushing bar, and the pushing assembly includes a connecting screw, a connecting plate, a pushing cylinder, an L-shaped plate and a pushing plate. The connecting screw passes through the connecting plate and is threadedly connected to the pushing hole. The fixed end of the pushing cylinder is fixed on the connecting plate, and the movable end of the pushing cylinder is fixedly connected to the L-shaped plate. A spring is connected between the L-shaped plate and the pushing plate.

[0008] As a preferred technical solution, a first slide rail is provided on the equipment bracket, a first slide groove is provided on the push bar, and the first slide groove is slidably connected to the first slide rail.

[0009] As a preferred technical solution, the upper plate assembly also includes a stepper motor, a pulley, an adjusting wheel, a fixed plate and a movable plate, the fixed end of the fixed plate and the stepper motor are both fixed on the equipment bracket, the movable end of the stepper motor is transmission-connected to the pulley, a second screw rod is connected between the pulley and the adjusting wheel, the pulley is fixedly connected to one end of the second screw rod, the adjusting wheel is rotationally linked to the second screw rod, and the adjusting wheel is fixed on the movable plate.

[0010] As a preferred technical solution, conveyor belts are provided on both the fixed plate and the movable plate.

[0011] As a preferred technical solution, the upper shelf assembly includes a third screw rod, a first movable platform, a first fixed cylinder, a second fixed cylinder, a first insertion cylinder and a first opening cylinder. The third screw rod is arranged on the equipment bracket, and a first support block is arranged at the bottom of the first movable platform. The first support block is transmission-connected to the third screw rod. The first fixed cylinder and the second fixed cylinder are respectively arranged at the two ends of the first movable platform, and the first insertion cylinder is arranged between the first fixed cylinder and the second fixed cylinder. The fixed end of the first opening cylinder is fixed on the first movable platform, and the movable end of the first opening cylinder is fixedly connected to the fixed end of the first insertion cylinder.

[0012] As a preferred technical solution, the upper shelf assembly also includes a second slide rail and a second slide groove, the second slide rail is fixed on the equipment bracket, the second slide groove is arranged at the bottom of the first mobile platform, and the second slide rail is slidably connected to the second slide groove.

[0013] As a preferred technical solution, the lower frame assembly includes a fourth screw rod, a second movable platform, a third fixed cylinder, a fourth fixed cylinder, a second insertion cylinder and a second opening cylinder. The fourth screw rod is arranged on the equipment bracket, and a second support block is arranged at the bottom of the second movable platform. The second support block is transmission-connected to the fourth screw rod. The third fixed cylinder and the fourth fixed cylinder are respectively arranged at two ends of the second movable platform, and the second insertion cylinder is arranged between the third fixed cylinder and the fourth fixed cylinder. The fixed end of the second opening cylinder is fixed on the second movable platform, and the movable end of the second opening cylinder is fixedly connected to the fixed end of the second insertion cylinder.

[0014] As a preferred technical solution, the lower shelf assembly also includes a third slide rail and a third slide groove, the third slide rail is fixed on the equipment bracket, the third slide groove is arranged at the bottom of the second mobile platform, and the third slide rail is slidably connected to the third slide groove.

[0015] As a preferred technical solution, sensors are provided at both ends of the return track.

[0016] The beneficial effects of the present invention are: providing a PCB automatic reflow device, which can automatically and quickly push the PCB into a reflow furnace for reflow, has a high degree of automation, high efficiency, and a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below based on the accompanying drawings and embodiments.

[0018] Figure 1 The figure is an overall schematic diagram of a PCB automatic reflow device according to an embodiment (rotated 90° counterclockwise);

[0019] Figure 2 A schematic diagram of the combination of the upper plate assembly and the upper frame assembly according to the embodiment;

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 It is a structural schematic diagram of the rack assembly described in the embodiment;

[0022] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0023] Figures 1 to 5 middle:

[0024] 1. Equipment support; 2. Reflow furnace; 3. Conveying track; 4. Return track; 5. First insertion cylinder; 6. First opening cylinder; 7. Push bar; 8. Second slide rail; 9. Connecting plate; 10. Push cylinder; 11. L-shaped plate; 12. Push plate; 13. Spring; 14. First slide rail; 15. First slide groove; 16. First support block; 17. Pulley; 18. Adjusting wheel; 19. Fixed plate; 20. Movable plate; 21. Second screw rod; 22. Third screw rod; 23. First moving platform; 24. First fixed cylinder; 25. Second fixed cylinder. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] like Figures 1 to 5As shown, in this embodiment, a PCB automatic reflow device includes an equipment bracket 1 and an upper plate assembly, an upper frame assembly, a reflow furnace 2, a lower frame assembly, a conveying track 3, and a return track 4 arranged on the equipment bracket 1. The discharge end of the upper frame track and the feed end of the lower frame assembly are respectively connected to the two ends of the conveying track 3, the conveying track 3 runs through the reflow furnace 2, the return track 4 connects the feed end of the upper frame track and the discharge end of the lower frame track, the upper plate assembly is located on one side of the discharge end of the upper frame assembly, the upper plate assembly includes two pushing assemblies, a first lead screw, a pushing bar 7 and a servo motor, the movable end of the servo motor is connected to the first lead screw, the first lead screw is placed along the horizontal direction, one side of the pushing bar 7 is transmission-connected to the first lead screw, and the two pushing assemblies are respectively fixed at the two ends of the other side of the pushing bar 7.

[0027] The servo motor automatically allows the two pushing components to push the PCB from the feeding end of the upper plate component to the discharging end, which has a compact structure, increases the linkage of the overall component, and reduces working errors.

[0028] In this embodiment, a plurality of pushing holes are provided on the pushing bar 7, and the pushing assembly includes connecting screws, a connecting plate 9, a pushing cylinder 10, an L-shaped plate 11 and a pushing plate 12. The connecting screws penetrate through the connecting plate 9 and are threadedly connected to the pushing holes. The fixed end of the pushing cylinder 10 is fixed on the connecting plate 9, and the movable end of the pushing cylinder 10 is fixedly connected to the L-shaped plate 11. A spring 13 is connected between the L-shaped plate 11 and the pushing plate 12.

[0029] The push holes at different positions are applicable to PCBs with inconsistent sizes.

[0030] The additional spring 13 reduces the hard collision of the device with the PCB.

[0031] In this embodiment, a first slide rail 14 is disposed on the equipment support 1 , and a first slide groove 15 is disposed on the push bar 7 . The first slide groove 15 is slidably connected to the first slide rail 14 .

[0032] The first slide rail 14 and the first slide groove 15 can reduce the movement friction on the device and increase the service life of the device.

[0033] In this embodiment, the upper plate assembly also includes a stepper motor, a pulley 17, an adjusting wheel 18, a fixed plate 19 and a movable plate 20. The fixed end of the fixed plate 19 and the stepper motor are fixed on the equipment bracket 1. The movable end of the stepper motor is transmission-connected to the pulley 17. A second screw rod 21 is connected between the pulley 17 and the adjusting wheel 18. The pulley 17 is fixedly connected to one end of the second screw rod 21. The adjusting wheel 18 is rotationally linked to the second screw rod 21. The adjusting wheel 18 is fixed on the movable plate 20.

[0034] In this embodiment, conveyor belts are disposed on both the fixed plate 19 and the movable plate 20 .

[0035] In this embodiment, the upper shelf assembly includes a third screw rod 22, a first movable platform 23, a first fixed cylinder 24, a second fixed cylinder 25, a first insertion cylinder 5 and a first opening cylinder 6. The third screw rod 22 is arranged on the equipment bracket 1, and a first support block 16 is arranged at the bottom of the first movable platform 23. The first support block 16 is transmission-connected to the third screw rod 22. The first fixed cylinder 24 and the second fixed cylinder 25 are respectively arranged at the two ends of the first movable platform 23. The first insertion cylinder 5 is arranged between the first fixed cylinder 24 and the second fixed cylinder 25. The fixed end of the first opening cylinder 6 is fixed on the first movable platform 23, and the movable end of the first opening cylinder 6 is fixedly connected to the fixed end of the first insertion cylinder 5.

[0036] When the carrier enters the upper shelf assembly, first the first fixed cylinder 24 and the second fixed cylinder 25 clamp the two ends of the PCB respectively, the first insertion cylinder 5 is inserted between the upper end and the lower end of the carrier, and the first opening cylinder 6 is started to lift the upper end of the carrier to facilitate the insertion of the PCB into the carrier.

[0037] In this embodiment, the upper shelf assembly also includes a second slide rail 8 and a second slide groove, the second slide rail 8 is fixed on the equipment bracket 1, the second slide groove is arranged at the bottom of the first movable platform 23, and the second slide rail 8 is slidably connected to the second slide groove.

[0038] In this embodiment, the lower frame assembly includes a fourth screw rod, a second movable platform, a third fixed cylinder, a fourth fixed cylinder, a second insertion cylinder and a second opening cylinder. The fourth screw rod is arranged on the equipment bracket 1, and a second support block is arranged at the bottom of the second movable platform. The second support block is transmission-connected to the fourth screw rod. The third fixed cylinder and the fourth fixed cylinder are respectively arranged at the two ends of the second movable platform, and the second insertion cylinder is arranged between the third fixed cylinder and the fourth fixed cylinder. The fixed end of the second opening cylinder is fixed on the second movable platform, and the movable end of the second opening cylinder is fixedly connected to the fixed end of the second insertion cylinder.

[0039] In this embodiment, the lower shelf assembly also includes a third slide rail and a third slide groove, the third slide rail is fixed on the equipment bracket 1, the third slide groove is arranged at the bottom of the second mobile platform, and the third slide rail is slidably connected to the third slide groove.

[0040] In this embodiment, sensors are disposed at both ends of the return track 4 .

[0041] It should be stated that the above-mentioned specific implementation methods are only preferred embodiments of the present invention and the technical principles used. Within the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by technicians familiar with this technical field should be included in the protection scope of the present invention.

Claims

1. A PCB automatic reflow equipment, characterized in that: It includes an equipment support and an upper plate assembly, an upper frame assembly, a reflow furnace, a lower frame assembly, a conveying track, and a return track arranged on the equipment support. The discharge end of the upper frame assembly and the feed end of the lower frame assembly are respectively connected to the two ends of the conveying track, the conveying track runs through the reflow furnace, the return track connects the feed end of the upper frame assembly and the discharge end of the lower frame assembly, the upper plate assembly is located on one side of the discharge end of the upper frame assembly, the upper plate assembly includes two pushing assemblies, a first lead screw, a pushing bar, and a servo motor, the movable end of the servo motor is connected to the first lead screw, the first lead screw is placed in the horizontal direction, one side of the pushing bar is transmission-connected to the first lead screw, and the two pushing assemblies are respectively fixed to the two ends of the other side of the pushing bar; The pushing bar is provided with a plurality of pushing holes, and the pushing assembly comprises a connecting screw, a connecting plate, a pushing cylinder, an L-shaped plate and a pushing plate. The connecting screw passes through the connecting plate and is threadedly connected to the pushing hole. The fixed end of the pushing cylinder is fixed to the connecting plate, and the movable end of the pushing cylinder is fixedly connected to the L-shaped plate. A spring is connected between the L-shaped plate and the pushing plate. The upper plate assembly also includes a stepper motor, a pulley, an adjusting wheel, a fixed plate and a movable plate, the fixed plate and the fixed end of the stepper motor are both fixed on the equipment bracket, the movable end of the stepper motor is transmission-connected with the pulley, a second screw rod is connected between the pulley and the adjusting wheel, the pulley is fixedly connected to one end of the second screw rod, the adjusting wheel is rotationally connected to the second screw rod, and the adjusting wheel is fixed to the movable plate; The upper shelf assembly includes a third screw rod, a first movable platform, a first fixed cylinder, a second fixed cylinder, a first insertion cylinder and a first opening cylinder. The third screw rod is arranged on the equipment bracket. A first support block is arranged at the bottom of the first movable platform. The first support block is transmission-connected to the third screw rod. The first fixed cylinder and the second fixed cylinder are respectively arranged at the two ends of the first movable platform. The first insertion cylinder is arranged between the first fixed cylinder and the second fixed cylinder. The fixed end of the first opening cylinder is fixed on the first movable platform. The movable end of the first opening cylinder is fixedly connected to the fixed end of the first insertion cylinder.

2. The PCB automatic reflow equipment according to claim 1, characterized in that: The equipment bracket is provided with a first slide rail, the push bar is provided with a first slide groove, and the first slide groove is slidably connected to the first slide rail.

3. The PCB automatic reflow equipment according to claim 1, characterized in that: Conveying belts are arranged on both the fixed plate and the movable plate.

4. The PCB automatic reflow equipment according to claim 1, characterized in that: The upper shelf assembly also includes a second slide rail and a second slide groove, the second slide rail is fixed on the equipment bracket, the second slide groove is arranged at the bottom of the first mobile platform, and the second slide rail is slidably connected to the second slide groove.

5. The PCB automatic reflow equipment according to claim 1, characterized in that: The lower frame assembly includes a fourth screw rod, a second movable platform, a third fixed cylinder, a fourth fixed cylinder, a second insertion cylinder and a second opening cylinder. The fourth screw rod is arranged on the equipment bracket. A second support block is arranged at the bottom of the second movable platform. The second support block is transmission-connected to the fourth screw rod. The third fixed cylinder and the fourth fixed cylinder are respectively arranged at two ends of the second movable platform. The second insertion cylinder is arranged between the third fixed cylinder and the fourth fixed cylinder. The fixed end of the second opening cylinder is fixed on the second movable platform. The movable end of the second opening cylinder is fixedly connected to the fixed end of the second insertion cylinder.

6. The PCB automatic reflow equipment according to claim 5, characterized in that: The lower frame assembly also includes a third slide rail and a third slide groove, the third slide rail is fixed on the equipment bracket, the third slide groove is arranged at the bottom of the second mobile platform, and the third slide rail is slidably connected to the third slide groove.

7. The PCB automatic reflow equipment according to claim 1, characterized in that: Sensors are arranged at both ends of the return track.

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