High-precision feeding device for conveying ultrathin steel belt

Abstract

The utility model belongs to the technical field of auxiliary equipment for machining automobile parts, and particularly relates to a high-precision feeding device for conveying ultrathin steel strips. Comprising a machine frame, a feeding roller assembly, a driving motor and an adjusting system, the feeding roller assembly is arranged on the machine frame, feeding rollers comprise a driven roller and a driving roller, the driving roller is arranged below the driven roller, the driving motor drives the driving roller to rotate, a driving gear is installed on a center shaft of the driving roller, and the adjusting system is arranged on the driving gear. A driving gear is installed at the end of the driving roller, a driven gear is installed at the end of the driven roller, the driving gear is meshed with the driven gear, a steel belt passes through the position between the driving roller and the driven roller, and the diameter ratio of the driven roller to the driving roller is 1: 1.3. And the adjusting system is connected with the driven rollers, and is used for adjusting the gap and the clamping force between the driven rollers. The feeding stability and feeding precision of the high-strength steel belt in the production process can be improved, and unqualified products caused by feeding procedures in the production process are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for processing automobile parts, in particular to a high-precision feeding device for conveying ultra-thin steel strips. Background Art

[0002] Ultra-high-strength steel door sills, anti-collision beams, and other structures are widely used in lightweight vehicles, primarily using thin steel strips ranging from 0.8 to 3 mm. During the production process, due to the high tensile strength, high rigidity, and poor plasticity of high-strength steel strips, the feeding process on the production line is generally subject to poor feeding accuracy and stability. This often leads to excessive fluctuations in product length, dimensions, and hole placement, failing to meet quality requirements and resulting in substandard products.

[0003] Currently, thin steel strip feeders used in production lines primarily employ two feeding mechanisms: hydraulic and pneumatic roller clamping. The hydraulic clamping method employs high clamping force, requiring parameter adjustment based on material thickness and strength. The feed rollers operate under high hydraulic cylinder pressure for extended periods, which can lead to bending and surface wear. Consequently, the hydraulic clamping method places high demands on the feed roller material, bearings, and frame rigidity. The device also requires a complex structure, and the hydraulic station must operate continuously to ensure constant cylinder output pressure, resulting in energy consumption.

[0004] The traditional pneumatic pressing method uses an air pressure of 0.4~0.6MPa, which limits the pressing force of the feed roller. In situations where a larger pressing force is required, the working stability of the cylinder is greatly affected by the air source, which can easily lead to large fluctuations in the pressing force of the feed roller. This is especially true when feeding high-strength thin steel plates. When the surface flatness of the steel strip is poor, the feeding accuracy fluctuations are more obvious.

[0005] In the traditional structure, the outer diameters of the active roller and the driven roller are the same. After the rollers are tightened, there is a large deviation between the meshing center of the upper and lower feed rollers and the vertical center of the wheels. During the feeding process, the surface of the material belt is prone to bending and deformation. When the thickness is different, the steel belt vibrates when passing through the feed rollers, causing the measuring wheel to measure the vibrating steel belt. There will be measurement errors, resulting in a decrease in feeding accuracy. At the same time, the existing active roller and driven roller are fixedly installed on the equipment with rollers of the same outer diameter. The gap between the active roller and the driven roller is constant. The uneven thickness of the same steel belt will cause changes in the clamping force, and eventually cause the rollers to slip, thereby increasing the wear of the rollers. In addition, rollers with the same outer diameter need to be replaced in pairs after wear. It is difficult to disassemble and assemble the active and driven rollers at the same time, and the accuracy of the equipment deteriorates after reassembly. There is an urgent need for a feeding device with higher feeding accuracy and better stability. Utility Model Content

[0006] The utility model provides a high-precision feeding device for conveying ultra-thin steel strips, which can improve the feeding stability and feeding accuracy of high-strength steel strips in the production process and reduce the occurrence of unqualified products caused by the feeding process in the production process.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] A high-precision feeding device for conveying ultra-thin steel strips comprises a frame, a feed roller assembly, a drive motor and an adjustment system, wherein the feed roller assembly is arranged on the frame, the feed roller comprises a driven roller and a driving roller, the driving roller is arranged below the driven roller, the drive motor drives the driving roller to rotate, the central axis of the driving roller is installed with a driving gear, the end of the driven roller is installed with a driven gear, the driving gear is meshed with the driven gear, the steel strip passes between the driving roller and the driven roller, and the diameter ratio of the driven roller to the driving roller is 1:1.3; the adjustment system is connected to the driven roller, and the adjustment system adjusts the gap and clamping force between the driven rollers.

[0009] The above-mentioned high-precision feeding device for ultra-thin steel strip conveying, the adjustment system includes a gap adjustment mechanism and a gap floating mechanism, the frame is provided with a connecting shaft, two connecting plates and a linkage shaft, the connecting plate is L-shaped, the connecting plate is arranged at both ends of the connecting shaft, the middle part of the connecting plate is fixedly connected to the end of the connecting shaft, one end of the connecting plate is connected to the end of the central shaft of the driven roller; the other end is connected to the end of the linkage shaft, the gap adjustment mechanism is connected to the linkage shaft, and drives the linkage shaft to move forward and backward, the gap floating mechanism is connected to the linkage shaft, and the movement direction of the steel strip is from right to left.

[0010] The above-mentioned high-precision feeding device for ultra-thin steel strip conveying comprises a floating gap mechanism comprising a connecting rod, an adjustment nut, a spring, and a fixed block. The fixed block is fixed to the frame and located at the right end of the connecting plate. The left end of the connecting rod is provided with a connecting block, which has an arc-shaped adjustment hole, through which the linkage shaft passes. The right end of the connecting rod is externally threaded and is threadedly connected to the adjustment nut. The adjustment spring is sheathed around the connecting rod and located between the adjustment nut and the fixed plate.

[0011] The above-mentioned high-precision feeding device for ultra-thin steel strip conveying, the gap adjustment mechanism includes a pushing block and a telescopic cylinder, the pushing block is against the linkage shaft, the cylinder barrel of the telescopic cylinder is fixed on the frame, and the telescopic cylinder drives the pushing block to move forward and backward.

[0012] The above-mentioned high-precision feeding device for ultra-thin steel strip conveying has a spacing L between the linkage shaft and the connecting shaft, a spacing S between the driven roller and the connecting shaft, L:S=2:1, and when the driven roller contacts the active roller, the angle between the line connecting the driven roller and the active roller and the vertical plane is α, and α is 0-3°.

[0013] Compared with the existing technology, the utility model can meet the needs of high-strength steel strip online high-precision feeding. The L-shaped connecting plate, the spacing ratio between the linkage shaft and the driven roller and the connecting shaft is set to 2:1. The lever is used for force amplification and compression, which can provide a larger clamping force. The clamping force between the driven roller and the active roller can be manually adjusted according to the steel strip material. The main and driven rollers are designed with different outer diameters, and the axial offset of the feeding roller is extremely small, which improves the feeding stability and also reduces the wear and replacement frequency of the active roller. The gap floating mechanism can make the gap between the active roller and the driven roller change with the uneven thickness of the steel strip to prevent slipping and excessive wear. It can meet the steel strip thickness of 0.8~3mm, reduce the vibration of the steel strip, improve the feeding accuracy, improve production efficiency, and effectively meet the product parts' requirements for dimensional accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the rear side of the utility model;

[0016] Figure 3 This is a structural diagram of the gap floating mechanism of the utility model;

[0017] Figure 4 A is a schematic structural diagram of the initial position of the gap floating mechanism of the present invention, and b is a schematic structural diagram of the initial position of the gap floating mechanism during operation;

[0018] The symbols in the accompanying drawings indicate: 1. frame, 2. feed roller assembly, 3. drive motor, 5. adjustment system, 6. driven roller, 7. driving roller, 8. driving gear, 9. driven gear, 10. connecting shaft, 11. connecting plate, 12. linkage shaft, 13. push block, 14. telescopic cylinder, 15. connecting rod, 16. adjusting nut, 17. spring, 18. fixing plate, 19. connecting block. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention.

[0020] like Figures 1 to 4The present invention includes a frame 1, a feed roller assembly 2, a drive motor 3, and an adjustment system 5. The feed roller assembly 2 is mounted on the frame 1. The feed roller includes a driven roller 6 and a driving roller 7. The driving roller 7 is mounted below the driven roller 6. The drive motor 3 drives the driving roller 7 to rotate. A driving gear 8 is mounted on the central axis of the driving roller 7. A driven gear 9 is mounted on the end of the driven roller 6. The driving gear 8 meshes with the driven gear 9. The steel strip passes between the driving roller 7 and the driven roller 6. The adjustment system 5 is connected to the driven roller 6 and adjusts the gap and clamping force between the driving roller 7 and the driven roller 6. With the above arrangement, when in use, the present device is installed near the measuring device of the production line. The steel strip passes through the feed roller assembly and measuring device of the present device. The drive motor 3 drives the driving roller 7 to rotate. The driven roller 6 and the driving roller 7 clamp the steel strip and feed the strip. The measuring device then measures the length of the steel strip and monitors the feeding speed.

[0021] Furthermore, to adjust the gap between the active roller 7 and the driven roller 6, the adjustment system 5 includes a gap adjustment mechanism and a gap floating mechanism. The frame 1 is provided with a connecting shaft 10, two connecting plates 11, and a linkage shaft 12. The connecting plate 11 is L-shaped and is located at both ends of the connecting shaft 10. The middle portion of the connecting plate 11 is fixedly connected to the end of the connecting shaft 10. One end of the connecting plate 11 is connected to the end of the central axis of the driven roller 6; the other end is connected to the end of the linkage shaft 12. The gap adjustment mechanism is connected to the linkage shaft 12 and drives the linkage shaft 12 to move left and right. The gap floating mechanism is connected to the linkage shaft 12. The direction of movement of the steel strip is from right to left. When the linkage shaft 12 moves leftward, the bottom end of the L-shaped connecting plate moves leftward, causing the driven roller 6 at the other end of the connecting plate to rotate downward with the connecting shaft 10 as the center, increasing the gap between the driven roller 6 and the active roller 7. Conversely, when the driven roller 6 moves upward, the gap between the driven roller 6 and the active roller 7 is reduced. Preferably, the gap adjustment mechanism includes a push block 13 and a telescopic cylinder 14. The push block 13 abuts the linkage shaft 12. The cylinder barrel of the telescopic cylinder 14 is fixed to the frame 1. The telescopic cylinder 14 drives the push block 13 to move left and right. The gravity of the driven roller 6 and the rightward thrust of the push block 13 maintain the swing position of the L-shaped connecting piece 11, thereby fixing the position of the driven roller 6 and ultimately controlling and maintaining the gap between the driven roller 6 and the active roller 7. This allows for matching the feeding of steel strips of different thicknesses.

[0022] Furthermore, in order to adjust the clamping force between the active roller 7 and the driven roller 6, the gap floating mechanism includes a connecting rod 15, an adjusting nut 16, a spring 17 and a fixed plate 18. The fixed plate 18 is fixed on the frame and is located at the right end of the connecting piece 11. The left end of the connecting rod 15 is provided with a connecting block 19, and the connecting block 19 is provided with an arc-shaped adjustment hole. The arc-shaped adjustment hole can ensure that the linkage shaft 12 passes through the adjustment hole; the right end of the connecting rod 15 is provided with an external thread and is screwed with an adjusting nut 16. The spring 17 is sleeved on the outside of the connecting rod 15, and the adjusting spring 17 is arranged between the adjusting nut 16 and the fixed plate 18. Spring 17 presses against fixed plate 18, pulling linkage shaft 12 rightward. Because linkage shaft 12 is connected to connecting plate 11, this in turn regulates the downward pressure on driven roller 6. The rightward pulling force exerted by spring 17 on linkage shaft 12, combined with the thrust exerted by push block 13 on linkage shaft 12, forms a combined force that maintains the clamping force between driven roller 6 and active roller 7. The deformation of spring 17 maintains the downward pressure on driven roller 6. Even steel strips of the same specification have thickness variations within a normal tolerance range. As the strip thickens, it pushes driven roller 6 upward. Connecting plate 11 pulls connecting rod 15 leftward, further compressing spring 17. This reduces wear on driven roller 6 and active roller 7, preventing strip breakage and wear on feed roller assembly 2 caused by conventional constant-pitch feed rollers. As the strip thins, spring 17 lowers driven roller 6, maintaining its pressure on the strip and preventing wear on both the strip and driven roller 6 due to slippage. Throughout the entire process, if the thickness of the steel strip suddenly changes, the setting of spring 17 can ensure that the driven roller 6 and the active roller 7 always clamp the steel strip tightly, reducing the vibration of the steel strip and the measurement accuracy of the measuring device caused by the steel strip vibration. This avoids the disadvantages of the traditional feeding structure with constant gap and clamping force.

[0023] By adjusting the nut 16 to move left and right on the connecting rod 15, the left and right position of the connecting block 19 can be adjusted, thereby adjusting the deformation amount, and finally achieving the adjustment of the clamping force between the driven roller 6 and the active roller 7 to match the conveying of steel strips of different thicknesses.

[0024] Specifically, the spacing L between the linkage shaft 12 and the connecting shaft 10, and the spacing S between the driven roller 6 and the connecting shaft 10, are in a ratio of L:S = 2:1. When the gap between the driven roller 6 and the active roller 7 is maximum, the driven roller 6 is directly above the active roller 7, and the axis of the connecting shaft 10 is lower than the center axis of the driven roller 6. Taking a typical active roller 7 with an outer diameter of 90 mm as an example, under the same operating conditions, the driven roller 6 rotates 3° about the axis center, and the axis center offset between the active roller 7 and the driven roller 6 is 0.5 mm, resulting in a fitting center offset of 0.017 mm. During operation, the driven roller 6 approaches the active roller 7, and the angle α between the axis center of the driven roller 6 and the active roller 7 and the vertical plane is 0-3°. The diameter ratio of the driven roller 6 to the active roller 7 is 1:1.3. Adjusting α can accommodate the conveying of steel strips of varying thicknesses and prevent deformation caused by excessive bending and squeezing of the steel strip as it passes between the driven roller 6 and the active roller 7. The above settings can meet the needs of conveying steel belts with a thickness of 0.8~3mm. The feeding accuracy can be controlled within ±0.2mm, and the feeding speed is 40m / min, which can effectively meet the dimensional accuracy requirements of the product parts.

[0025] In actual use, the detection value of the measuring device is compared with the operating data of the drive motor 3, and the operating parameters of the drive motor 3 are adjusted online to achieve closed-loop control, so that the feeding accuracy is within a controllable range.

[0026] Working principle: In the initial state, the gap between the active roller 7 and the driven roller 6 is a maximum of 3.5 mm. In the working state, the telescopic cylinder 14 is set to operate according to the thickness of the steel strip to be conveyed, and the pushing block 13 pushes the linkage shaft 12 to a suitable position, so that the driven roller 6 reaches a suitable height; at the same time, the position of the adjustment nut on the connecting rod 15 is adjusted according to the thickness of the steel strip, so that the clamping force of the feed roller reaches the set value to ensure the clamping force.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-precision feeding device for ultra-thin steel strip conveying, characterized in that: It includes a frame, a feed roller assembly, a drive motor and an adjustment system, the feed roller assembly is arranged on the frame, the feed roller includes a driven roller and an active roller, the active roller is arranged below the driven roller, the drive motor drives the active roller to rotate, the central axis of the active roller is installed with a driving gear, the end of the driven roller is installed with a driven gear, the driving gear is engaged with the driven gear, the steel strip passes between the active roller and the driven roller, the diameter ratio of the driven roller to the active roller is 1:1.3; the adjustment system is connected to the driven roller, and the adjustment system adjusts the gap and clamping force between the driven rollers.

2. The high-precision feeding device for ultra-thin steel strip conveying according to claim 1, characterized in that: The adjustment system includes a gap adjustment mechanism and a gap floating mechanism. The frame is provided with a connecting shaft, two connecting plates and a linkage shaft. The connecting plate is L-shaped and is arranged at both ends of the connecting shaft. The middle part of the connecting plate is fixedly connected to the end of the connecting shaft. One end of the connecting plate is connected to the end of the central shaft of the driven roller; the other end is connected to the end of the linkage shaft. The gap adjustment mechanism is connected to the linkage shaft and drives the linkage shaft to move forward and backward. The gap floating mechanism is connected to the linkage shaft, and the movement direction of the steel belt is from right to left.

3. The high-precision feeding device for ultra-thin steel strip conveying according to claim 2, characterized in that: The gap floating mechanism includes a connecting rod, an adjusting nut, a spring and a fixed block. The fixed block is fixed on the frame and is located at the right end of the connecting plate. A connecting block is provided at the left end of the connecting rod. An arc-shaped adjusting hole is provided on the connecting block. The linkage shaft passes through the adjusting hole. An external thread is provided at the right end of the connecting rod and is screwed with an adjusting nut. The spring is sleeved outside the connecting rod. The adjusting spring is provided between the adjusting nut and the fixed plate.

4. The high-precision feeding device for ultra-thin steel strip conveying according to claim 3, characterized in that: The gap adjustment mechanism includes a push block and a telescopic cylinder. The push block abuts against the linkage shaft. The cylinder barrel of the telescopic cylinder is fixed on the frame. The telescopic cylinder drives the push block to move forward and backward.

5. The high-precision feeding device for ultra-thin steel strip conveying according to claim 4, characterized in that: The distance between the linkage shaft and the connecting shaft is L, and the distance between the driven roller and the connecting shaft is S, L:S=2:

1. When the driven roller contacts the active roller, the angle between the line connecting the driven roller and the active roller and the vertical plane is α, and α is 0-3°.

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