An accurate feeding device in a steel sheet processing process

Abstract

The utility model provides an accurate feeding device in steel sheet processing process, including conveying frame, servo drive mechanism, initiative roll, passive roll, passive roll lifting mechanism, passive roll synchronous lifting mechanism and closed loop feedback mechanism, initiative roll is installed on conveying frame, passive roll is in initiative roll's top, passive roll installs passive roll lifting mechanism, passive roll lifting mechanism sets up on conveying frame, and passive roll synchronous lifting mechanism is arranged between passive roll lifting mechanism and conveying frame, and closed loop feedback mechanism is provided on conveying frame. Through passive roll lifting mechanism adjustment passive roll and initiative roll between the gap, servo drive mechanism drives initiative roll and passive roll rotation, and steel sheet moves forward between initiative roll and passive roll, and the moving distance can be monitored by closed loop feedback mechanism, realizes the accurate control of steel sheet conveying distance.

Description

Technical Field

[0001] This utility model relates to a device for conveying steel plates during processing, belonging to the field of steel plate conveying technology. Background Technology

[0002] During the processing of steel plates (such as leveling and shearing), they must be conveyed automatically. For equipment such as shearing machines, when shearing steel plates, the steel plates need to be conveyed to the worktable of the shearing machine.

[0003] In existing technology, a steel plate is conveyed forward by passing between a drive roller and a driven roller, with a speed reducer driving the drive roller to rotate. To increase friction, the drive roller and driven roller are generally made of rubber, and the roller diameter is relatively small, about 200mm. However, rubber rollers are prone to deformation during use, resulting in unstable conveying speed, and the small roller diameter also makes it difficult to precisely control the conveying speed. Summary of the Invention

[0004] This invention addresses the shortcomings of existing steel plate conveying technology by providing a precise feeding device for steel plate processing that ensures stable conveying and accurate conveying speed.

[0005] The precision feeding device in the steel plate processing of this utility model adopts the following technical solution:

[0006] The device includes a conveyor frame, a servo drive mechanism, an active roller, a passive roller, a passive roller lifting mechanism, a passive roller synchronous lifting mechanism, and a closed-loop feedback mechanism. The active roller is mounted on the conveyor frame, the passive roller is located above the active roller, the passive roller is mounted on the passive roller lifting mechanism, the passive roller lifting mechanism is located on the conveyor frame, a passive roller synchronous lifting mechanism is provided between the passive roller lifting mechanism and the conveyor frame, and a closed-loop feedback mechanism is provided on the conveyor frame.

[0007] The servo drive mechanism includes a servo motor, a coupling, a drive shaft, and a driven shaft. The servo motor is connected to the drive shaft via the coupling, the drive shaft is connected to the driven shaft via a gear transmission mechanism, the drive roller is connected to the drive shaft via a drive universal coupling, and the driven roller is connected to the driven shaft via a driven universal coupling. The servo motor drives the drive shaft to rotate via the coupling, the drive shaft drives the driven shaft to rotate via gear transmission, and the drive shaft and driven shaft then drive the drive roller and driven roller to rotate respectively via drive universal couplings and driven universal couplings.

[0008] The outer sides of the active and passive rollers are textured (laser textured) to ensure surface friction and prevent slippage between the rollers and the steel plate, which could cause dimensional errors (cutting length error, cutting steel plate length error). This also solves the problem of easy deformation of traditional rubber rollers.

[0009] The diameters of the active and passive rollers are 200mm-300mm, with the use of large diameters to solve the problem of easy deformation in the middle of traditional rollers.

[0010] The passive roller lifting mechanism includes a left lifting cylinder, a right lifting cylinder, a left support base, and a right support base. Both the left and right lifting cylinders are mounted on the conveyor frame. The left support base is hinged to the piston rod of the left lifting cylinder, and the right support base is hinged to the piston rod of the right lifting cylinder. The two ends of the passive roller are respectively mounted on the left and right support bases. The left and right lifting cylinders are quantitatively controlled using proportional valves to ensure that the synchronous lifting error of the piston rods of both cylinders is controlled within 0.05mm. The left and right lifting cylinders drive the left and right support bases to rise and fall respectively through their piston rods. The passive roller follows the rise and fall of the left and right support bases to adjust the gap with the active roller, accommodating the conveying of steel plates of different thicknesses.

[0011] A passive roller synchronous lifting mechanism is provided between the left and right support seats. This mechanism includes a synchronous shaft, synchronous gears, and a rack. The synchronous shaft is mounted on the conveyor frame, and two synchronous gears are installed on it. Both the left and right support seats have racks, and the two synchronous gears mesh with the racks on the left and right support seats respectively. When the left (or right) support seat rises or falls, its rack moves accordingly. The rack, through the synchronous gears meshing with it, drives the synchronous shaft to rotate. The synchronous shaft then drives the right (or left) support seat to rise or fall through another synchronous gear, thus achieving overall synchronous lifting of the passive roller.

[0012] The conveyor frame is equipped with a pressing mechanism, which includes a pressing cylinder, a pressing spring, and a pressing seat. The pressing cylinder is mounted on the conveyor frame, and the piston rod of the pressing cylinder is connected to the pressing seat through the pressing spring. When the steel plate is conveyed to the correct position, the piston rod of the pressing cylinder extends and drives the pressing seat to press against the steel plate through the pressing spring.

[0013] The conveyor frame is equipped with a supporting mechanism, which includes a bracket and idlers. The bracket is mounted on the conveyor frame, and parallel idlers are arranged on the upper part of the bracket, flush with the drive roller. When the steel plate is conveyed between the drive roller and the driven roller, it is supported by the idlers and can move forward on the idlers.

[0014] The closed-loop feedback mechanism includes a measuring roller mounted on a conveyor frame, an encoder mounted on the measuring roller, and the encoder being electrically connected to a servo motor controller in a servo drive mechanism. An elastic mechanism (such as a spring) is provided between the measuring roller and the conveyor frame to allow the measuring roller to press against the sheet metal. As the steel sheet passes through, the measuring roller rotates passively. The encoder on the roller acquires the number of rotations of the measuring roller, calculates the conveying distance based on the diameter of the measuring roller, and feeds the measurement data (conveying distance) back to the servo motor controller to adjust the operation (speed and time) of the servo motor.

[0015] The gap between the passive and active rollers is adjusted by a passive roller lifting mechanism, and the parallelism between the passive and active rollers is ensured by a passive roller synchronous lifting mechanism during the lifting process. The servo drive mechanism is activated to drive the active and passive rollers to rotate, and the steel plate moves forward between them. The moving distance can be monitored by a closed-loop feedback mechanism, achieving precise control of the steel plate conveying distance.

[0016] This invention solves several problems existing in the current steel plate conveying process, such as slippage, deformation, and unstable speed, and has the following characteristics:

[0017] 1. The use of steel roller roughening treatment not only ensures the friction of the roller surface and prevents slippage between the roller and the steel plate, thus avoiding dimensional errors, but also solves the problem of easy deformation of traditional rubber rollers;

[0018] 2. The use of large-diameter rollers solves the problem of easy deformation in the middle of traditional rollers;

[0019] 3. An advanced pneumatic distribution control method is adopted to ensure that the synchronous lifting error of the two cylinders is within 0.05mm;

[0020] 4. The active feeding system is driven by a servo motor and equipped with a closed-loop feedback mechanism, which can accurately monitor changes in speed and size, thus improving the accuracy of the conveying speed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structural principle of the precision feeding device in the steel plate processing of this utility model.

[0022] Figure 2 yes Figure 1 The left view.

[0023] The components are: 1. Servo motor, 2. Coupling, 3. Driven shaft, 4. Driven shaft, 5. Driven universal coupling, 6. Driven universal coupling, 7. Conveyor frame, 8. Driven roller, 9. Driven roller, 10. Left support seat, 11. Right support seat, 12. Left lifting cylinder, 13. Right lifting cylinder, 14. Pressing cylinder, 15. Pressing spring, 16. Pressing seat, 17. Closed-loop feedback mechanism, 18. Guide gear, 19. Guide rack, 20. Bracket, 21. Idler roller, 22. Synchronous shaft. Detailed Implementation

[0024] like Figure 1 and Figure 2As shown, the precision feeding device for steel plate processing of this utility model includes a conveyor frame 7, a servo drive mechanism, an active roller 8, a passive roller 9, a passive roller lifting mechanism, a passive roller synchronous lifting mechanism, a closed-loop feedback mechanism 17, a pressing mechanism, and a supporting mechanism. The servo drive mechanism is mounted on the conveyor frame 7 or has an independent support. The two ends of the active roller 8 are mounted on the conveyor frame 7 via bearings. The passive roller 9 is located above the active roller 8, and its two ends are mounted on the passive roller lifting mechanism via bearings. The passive roller lifting mechanism is mounted on the conveyor frame 7, and a passive roller synchronous lifting mechanism is provided between the passive roller lifting mechanism and the conveyor frame 7. A feedback mechanism 17 is provided between the active roller 8 and the servo drive mechanism. The conveyor frame 7 is also provided with a pressing mechanism and a supporting mechanism. The pressing mechanism is located to the left of the passive roller 9, and the supporting mechanism is located to the right of the active roller 8. The front of the steel plate conveying direction is the right side, and the rear is the left side. The axes of the active roller 8 and the passive roller 9 are perpendicular to the steel plate conveying direction.

[0025] See Figure 1 The servo drive mechanism includes a servo motor 1, a coupling 2, a drive shaft 3, and a driven shaft 4. The servo motor 1 is connected to the drive shaft 3 via the coupling 2. The drive shaft 3 is connected to the driven shaft 4 via a gear transmission mechanism. The drive shaft 3 and driven shaft 4 are mounted parallel to each other on a gearbox via bearings. The drive gear and driven gear in the gear transmission mechanism are respectively mounted on the drive shaft 3 and driven shaft 4. The servo motor 1 and the gearbox are mounted on the same support, or both are mounted on the conveyor frame 7. The drive roller 8 is connected to the drive shaft 3 via a drive universal coupling 5, and the driven roller 9 is connected to the driven shaft 4 via a driven universal coupling 6. The servo motor 1 drives the drive shaft 3 to rotate via the coupling 2. The drive shaft 3 drives the driven shaft 4 to rotate via gear transmission. The drive shaft 3 and driven shaft 4 then drive the drive roller 8 and driven roller 9 to rotate via drive universal couplings 5 ​​and 6, respectively. The drive roller 8 and driven roller 9 rotate in opposite directions.

[0026] The outer surfaces of the active roller 8 and the passive roller 9 are roughened (laser roughening) to ensure surface friction and prevent slippage between them and the steel plate, thus avoiding dimensional errors (cutting length error, error in the length of the cut steel plate). This also solves the problem of deformation common in traditional rubber rollers. The active roller 8 and the passive roller 9 have a large diameter of 200mm-300mm to address the issue of deformation in the middle of traditional rollers.

[0027] See Figure 1The passive roller lifting mechanism includes a left lifting cylinder 12, a right lifting cylinder 13, a left support seat 10, and a right support seat 11. Both the left and right lifting cylinders 12 and 13 are mounted on the upper part of the conveyor frame 7. The left support seat 10 is hinged to the piston rod of the left lifting cylinder 12, and the right support seat 11 is hinged to the piston rod of the right lifting cylinder 13. The two ends of the passive roller 9 are respectively mounted on the left support seat 10 and the right support seat 11 via bearings. The air intake of the left and right lifting cylinders 12 and 13 is quantitatively controlled by a proportional valve to ensure that the error in the synchronous lifting of the piston rods of both cylinders is controlled within 0.05mm. When the left and right lifting cylinders 12 and 13 are synchronously air-intake, their piston rods drive the left and right support seats 10 and 11 to rise or fall respectively. The passive roller 9 follows the rise and fall of the left and right support seats 10 and 11, changing the gap with the active roller 8 to accommodate the conveying of steel plates of different thicknesses.

[0028] See Figure 2 The passive roller synchronous lifting mechanism includes a synchronous shaft 22, synchronous gears 18, and racks 19. The synchronous shaft 22 is mounted on the conveyor frame 7. Two synchronous gears 18 are mounted on the synchronous shaft 22. Racks 19 are respectively provided on the left support seat 10 and the right support seat 11. The two synchronous gears 18 mesh with the racks 19 on the left support seat 10 and the right support seat 11, respectively. When the passive roller lifting mechanism is provided between the passive roller lifting mechanism and the conveyor frame 7, when the left lifting cylinder 12 (or the right lifting cylinder 13) drives the left support seat 10 (or the right support seat 11) to rise or fall, the rack 19 on the left support seat 10 (or the right support seat 11) moves accordingly. The rack 19 drives the synchronous shaft 22 to rotate through the synchronous gears meshing with it. The synchronous shaft 22 then drives the right support seat 11 (or the left support seat 10) to rise or fall through another synchronous gear, thereby realizing the overall synchronous lifting and falling of the passive roller 9 and ensuring that the parallelism between the passive roller 9 and the active roller 8 is controlled within the required range when the passive roller 9 rises or falls.

[0029] See Figure 2 A closed-loop feedback mechanism 17 is installed on the conveyor frame 7. The closed-loop feedback mechanism 17 includes a measuring roller mounted on the conveyor frame 7, an encoder mounted on the measuring roller, and the encoder is electrically connected to the controller of the servo motor 1 in the servo drive mechanism. An elastic mechanism (such as a spring) is provided between the measuring roller and the conveyor frame to allow the measuring roller to press against the steel plate. The required conveying distance of the steel plate can be converted into the number of revolutions of the driving roller 8 based on the diameter of the driving roller 8, and then the number of revolutions of the servo motor 1 is determined based on the number of revolutions of the driving roller 8. When the steel plate passes through, the measuring roller rotates passively, the encoder on it obtains the number of revolutions of the measuring roller, calculates the conveying distance based on the diameter of the measuring roller, and feeds the measurement data (conveying distance) back to the controller of the servo motor 1 to adjust the operation (speed and time) of the servo motor 1.

[0030] See Figure 2The clamping mechanism includes a clamping cylinder 14, a clamping spring 15, and a clamping seat 16. The clamping cylinder 14 is mounted on the upper part of the conveying frame 7, and the clamping seat 16 is connected to the piston rod of the clamping cylinder 14 via the clamping spring 15. When the steel plate is conveyed to the position, the piston rod of the clamping cylinder 14 extends, driving the clamping seat 16 to press against the steel plate via the clamping spring 15. When the piston rod of the clamping cylinder 14 retracts, the clamping seat 16 disengages from the steel plate.

[0031] See Figure 2 The supporting mechanism includes a bracket 20 and idlers 21. The bracket 20 is mounted on the conveyor frame 7, and the upper part of the bracket 20 is provided with parallel idlers 21, which are flush with the drive roller 8. When the steel plate is conveyed between the drive roller 8 and the driven roller 9, it is supported by the idlers 21 and can move forward on the idlers 21.

[0032] The operation process of the above-mentioned device is as follows.

[0033] First, the gap between the passive roller 9 and the active roller 8 is adjusted by the passive roller lifting mechanism to accommodate the thickness of the conveyed steel plate. Specifically, air is simultaneously introduced into the left lifting cylinder 12 and the right lifting cylinder 13, whose piston rods respectively drive the left support seat 10 and the right support seat 11 to rise or fall. The passive roller 9, mounted on the left support seat 10 and the right support seat 11, rises or falls accordingly, changing the gap with the active roller 8. During the lifting process, the parallelism between the passive roller 9 and the active roller 8 is ensured by the passive roller synchronous lifting mechanism.

[0034] Then, the servo motor 1 in the servo drive mechanism is started, driving the drive roller 8 to rotate via coupling 2, drive shaft 3, and drive universal coupling 5. Simultaneously, the drive shaft 3 drives the driven roller 9 to rotate via gear transmission, driven shaft 4, and driven universal coupling 6. The steel plate moves forward between the drive roller 8 and the driven roller 9. The moving distance can be monitored by the closed-loop feedback mechanism 17, which converts the moving distance into the number of revolutions of the drive roller 8. The number of revolutions of the drive roller 8 is then used to determine the number of revolutions of the servo motor 1, thus achieving precise control of the steel plate conveying distance.

Claims

1. A precision feeding device for steel plate processing, characterized in that: It includes a conveyor frame, a servo drive mechanism, an active roller, a passive roller, a passive roller lifting mechanism, a passive roller synchronous lifting mechanism, and a closed-loop feedback mechanism. The active roller is mounted on the conveyor frame, the passive roller is located above the active roller, the passive roller is mounted on the passive roller lifting mechanism, the passive roller lifting mechanism is set on the conveyor frame, a passive roller synchronous lifting mechanism is set between the passive roller lifting mechanism and the conveyor frame, and a closed-loop feedback mechanism is set on the conveyor frame.

2. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The servo drive mechanism includes a servo motor, a coupling, a drive shaft, and a driven shaft. The servo motor is connected to the drive shaft via the coupling, the drive shaft is connected to the driven shaft via a gear transmission mechanism, the drive roller is connected to the drive shaft via a drive universal coupling, and the driven roller is connected to the driven shaft via a driven universal coupling.

3. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The surfaces of the active and passive rollers have a textured structure.

4. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The diameters of the active and passive rollers are 200mm-300mm.

5. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The passive roller lifting mechanism includes a left lifting cylinder, a right lifting cylinder, a left support seat, and a right support seat. Both the left and right lifting cylinders are mounted on the conveyor frame. The piston rod of the left lifting cylinder is hinged to the left support seat, and the piston rod of the right lifting cylinder is hinged to the right support seat. The two ends of the passive roller are respectively mounted on the left support seat and the right support seat.

6. The precision feeding device in the steel plate processing process according to claim 5, characterized in that: The left and right lifting cylinders are controlled by proportional valves to ensure that the error in the synchronous lifting of their piston rods is controlled within 0.05mm.

7. The precision feeding device in the steel plate processing process according to claim 5, characterized in that: The passive roller synchronous lifting mechanism is provided between the left support and the right support. The passive roller synchronous lifting mechanism includes a synchronous shaft, synchronous gears and racks. The synchronous shaft is mounted on the conveyor frame and two synchronous gears are mounted on the synchronous shaft. Racks are provided on both the left support and the right support, and the two synchronous gears mesh with the racks on the left support and the right support, respectively.

8. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The conveyor frame is equipped with a clamping mechanism, which includes a clamping cylinder, a clamping spring, and a clamping seat. The clamping cylinder is mounted on the conveyor frame, and the piston rod of the clamping cylinder is connected to the clamping seat through the clamping spring.

9. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The conveyor frame is equipped with a support mechanism, which includes a bracket and rollers. The bracket is set on the conveyor frame, and parallel rollers are arranged on the upper part of the bracket, with the rollers flush with the drive roller.

10. The precision feeding device in the steel plate processing process according to claim 1, characterized in that: The closed-loop feedback mechanism includes a measuring roller mounted on a conveyor frame, an encoder mounted on the measuring roller, the encoder being electrically connected to a servo motor controller in a servo drive mechanism, and an elastic mechanism being provided between the measuring roller and the conveyor frame.

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