Equipment capable of improving feeding accuracy of roller type steel belt

Abstract

The invention belongs to the technical field of auxiliary equipment for automobile part machining, and particularly relates to equipment capable of improving the feeding accuracy of a roller type steel belt. Comprising a machine frame, a feeding roller assembly, a driving motor, a measuring mechanism and an adjusting system, the feeding roller assembly and the measuring mechanism are sequentially 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 space between the driving roller and the driven roller, and the adjusting system is connected with the driven roller and adjusts the gap and the clamping force between the driving roller and the driven roller. The feeding stability and feeding precision of the high-strength steel belt in the production process can be improved, and unqualified products caused by the feeding procedure in the production process are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary equipment for automobile parts processing, in particular to a device capable of improving the feeding accuracy of a roller steel belt. Background Art

[0002] Ultra-high-strength steel door sills, anti-collision beams and other structures are widely used in lightweight automobiles, mainly using 0.8~3mm thin steel strips. During the processing and production process, due to the high tensile strength, high rigidity and poor plasticity of high-strength steel strips, the feeding process of the production line generally has poor feeding accuracy and stability, resulting in frequent fluctuations in product length and hole position, which does not meet quality requirements and produces unqualified products.

[0003] At present, thin steel strip feeders for production lines mainly adopt two feeding structures, hydraulic clamping of feed rollers and pneumatic clamping. The hydraulic clamping method has a large clamping force, and the parameters need to be adjusted according to the thickness and strength of the material. The feed roller works under a large hydraulic cylinder clamping force for a long time, which is prone to bending deformation and surface wear. Therefore, the hydraulic clamping method has high requirements on the feed roller material, bearing parts and frame stiffness, etc. The device structure is complex, and the hydraulic station needs to work continuously during the operation to ensure that the cylinder output pressure is constant, which consumes energy.

[0004] The traditional pneumatic clamping method uses 0.4~0.6MPa air pressure, so the clamping force of the feed roller is limited. In situations where a larger clamping 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 clamping force of the feed roller. Especially when feeding high-strength thin steel plates, the feeding accuracy fluctuates more significantly when the surface flatness of the steel strip is poor.

[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 will vibrate when passing through the feed roller, 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 reinstallation. There is an urgent need for a feeding device with better feeding stability and higher measurement accuracy. Summary of the invention

[0006] The present invention provides a device capable of improving the feeding accuracy of a roller steel strip, which can improve the feeding stability and feeding accuracy of a high-strength steel strip in a production process and reduce the occurrence of defective products caused by a feeding procedure in the production process.

[0007] The present invention solves the above technical problems through the following technical solutions: A device capable of improving the feeding accuracy of roller steel strip comprises a frame, a feeding roller assembly, a driving motor, a measuring mechanism and an adjustment system, wherein the feeding roller assembly and the measuring mechanism are sequentially arranged on the frame, the feeding roller comprises a driven roller and an active roller, the active roller is arranged below the driven roller, the driving motor drives the active roller to rotate, a driving gear is installed on the central axis of the active roller, a driven gear is installed on the end of the driven roller, the driving gear is meshed with the driven gear, the steel strip passes between the active roller and the driven roller, the adjustment system is connected to the driven roller, and the adjustment system adjusts the gap and clamping force between the active roller and the driven roller.

[0008] The above-mentioned device for improving the feeding accuracy of roller steel belt, 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 axis 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 left and right, the gap floating mechanism is connected to the linkage shaft, and the movement direction of the steel belt is from right to left.

[0009] In the above-mentioned equipment for improving the accuracy of roller steel belt feeding, the spacing between the linkage shaft and the connecting shaft is L, the spacing between the driven roller and the connecting shaft is S, L:S=2:1, when the gap between the driven roller and the active roller is the largest, the driven roller is located directly above the active roller, and the axis of the connecting shaft is lower than the central axis of the driven roller; during operation, the driven roller is close to the active roller, and the angle between the axis line of the driven roller and the active roller and the vertical plane is α, and α is 0-3°.

[0010] In the above-mentioned device for improving the feeding accuracy of roller steel strip, the diameter ratio of the driven roller and the active roller is 1:1.3.

[0011] The above-mentioned equipment for improving the feeding accuracy of roller steel strip, the gap adjustment mechanism includes a push block and a telescopic cylinder, the push block is against the linkage shaft, the cylinder barrel of the telescopic cylinder is fixed on the frame, and the telescopic cylinder drives the push block to move left and right.

[0012] The above-mentioned device for improving the feeding accuracy of roller steel strip, the gap floating mechanism includes a connecting rod, an adjusting nut, a spring and a fixing plate, the fixing plate is fixed on the bracket and is located at the right end of the connecting plate, the left end of the connecting rod is provided with a connecting block, the connecting block is provided with an arc-shaped adjusting hole, and the linkage shaft passes through the adjusting hole; the right end of the connecting rod is provided with an external thread and is screwed with an adjusting nut, the adjusting spring is sleeved outside the connecting rod, and the adjusting spring is arranged between the adjusting nut and the fixing plate.

[0013] The above-mentioned device for improving the feeding accuracy of roller steel belt, the measuring mechanism includes a bracket, a supporting wheel, a measuring wheel and an encoder, the measuring wheel is located above the supporting wheel, the supporting wheel and the measuring wheel are arranged on the bracket, the steel belt passes between the supporting wheel and the measuring wheel, and the measuring wheel is connected to the encoder.

[0014] Compared with the prior art, the present invention 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 force is used to increase the pressure, which can provide a large clamping force. The pressure 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, the axial deviation of the feeding roller is extremely small, the feeding stability is better, and the wear and replacement frequency of the active roller are also reduced. 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, ensure the stability of the measurement environment, reduce the vibration of the steel strip, greatly improve the feeding accuracy, improve production efficiency, and effectively meet the product parts The requirements for dimensional accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic structural diagram of the rear side of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention without the L-shaped connecting piece; Figure 4 It is a structural schematic diagram of the gap floating mechanism of the present invention; Figure 5 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; The symbols in the accompanying drawings indicate: 1. frame, 2. feed roller assembly, 3. drive motor, 4. measuring mechanism, 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, 20. supporting wheel, 21. measuring wheel, 22. bracket. DETAILED DESCRIPTION

[0016] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention.

[0017] like Figures 1 to 5 The present invention comprises a frame 1, a feed roller assembly 2, a drive motor 3, a measuring mechanism 4 and an adjustment system 5. The feed roller assembly 2 and the measuring mechanism 4 are arranged on the frame 1 in sequence. The feed roller comprises a driven roller 6 and an active roller 7. The active roller 7 is arranged below the driven roller 6. The drive motor 3 drives the active roller 7 to rotate. The central axis of the active roller 7 is provided with a driving gear 8. The end of the driven roller 6 is provided with a driven gear 9. The driving gear 8 is meshed with the driven gear 9. The steel strip passes between the active roller 7 and the driven roller 6. The adjustment system 5 is connected to the driven roller 6. The adjustment system 5 adjusts the gap and clamping force between the active roller 7 and the driven roller 6. Through the above arrangement, the drive motor 3 drives the active roller 7 to rotate, the driven roller 6 and the active roller 7 clamp the steel strip and feed the material, and then the measuring mechanism 4 measures the length of the steel strip.

[0018] Furthermore, in order 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 arranged at both ends of the connecting shaft 10. The middle 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, and the steel belt moves from right to left. The linkage shaft 12 moves to the left, and the bottom end of the L-shaped connecting plate can be moved to the left, so that the driven roller 6 at the other end of the connecting plate rotates downward with the connecting shaft 10 as the center, and the gap between the driven roller 6 and the active roller 7 is increased; on the contrary, the driven roller 6 moves upward, and 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, wherein the push block 13 abuts against the linkage shaft 12, and the cylinder barrel of the telescopic cylinder 14 is fixed on the frame 1, and 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 finally controlling and maintaining the spacing between the driven roller 6 and the active roller 7. In order to match the feeding of steel strips of different thicknesses.

[0019] 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 fixing plate 18. The fixing plate 18 is fixed on the bracket 22 and is located at the right end of the connecting plate 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 the adjusting nut 16. The adjusting spring 17 is sleeved outside the connecting rod 15, and the adjusting spring 17 is arranged between the adjusting nut 16 and the fixing plate 18. The spring 17 presses the fixed plate 18 to pull the linkage shaft 12 to the right. Since the linkage shaft 12 is connected to the connecting plate 11, the downward pressure of the driven roller 6 is adjusted. The deformation of the spring 17 produces a rightward pulling force on the linkage shaft 12, which together with the thrust generated by the push block 13 on the linkage shaft 12 form a resultant force. This resultant force ensures the clamping force between the driven roller 6 and the active roller 7. The deformation of the spring 17 maintains the downward pressure of the driven roller 6. Each steel belt will have a thickness change within the normal error range. If the steel belt becomes thicker, the driven roller 6 will be pushed up. Under the action of the connecting piece 11, the connecting rod 15 will be pulled to the left, so that the spring 17 is further compressed, which can reduce the hard wear of the driven roller 6 and the active roller 7, avoid the steel belt breakage caused by the traditional feeding roller with constant spacing and clamping force, and also reduce the wear of the feeding roller assembly 2; when the steel belt becomes thinner, under the action of the spring 17, the driven roller 6 drops, which can maintain the pressure of the driven roller 6 on the steel belt and prevent the wear of the steel belt and the driven roller 6 caused by the slip of the driven roller 6. During the whole process, when the thickness of the steel belt changes suddenly, the setting of the spring 17 can ensure that the driven roller 6 and the active roller 7 are always tightly clamped to the steel belt, reduce the vibration of the steel belt, and reduce the measurement accuracy of the measuring mechanism 4 caused by the vibration of the steel belt. Avoid the disadvantages of the traditional feeding structure with constant gap and clamping force.

[0020] 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 of the driven roller 6 and the active roller 7 to match the conveying of steel strips of different thicknesses.

[0021] Specifically, the spacing between the linkage shaft 12 and the connecting shaft 10 is L, and the spacing between the driven roller 6 and the connecting shaft 10 is S, L: S = 2: 1. When the gap between the driven roller 6 and the active roller 7 is the largest, the driven roller 6 is located directly above the active roller 7, and the axis of the connecting shaft 10 is lower than the central axis of the driven roller 6; taking the commonly used active roller 7 with an outer diameter of 90 mm as an example, under the same working condition, the driven roller 6 rotates 3° around the center of the rotating shaft, the axis of the active roller 7 and the driven roller 6 are offset by 0.5 mm, and the fitting center offset is 0.017 mm. During operation, the driven roller 6 is close to the active roller 7, and the angle between the axis connecting line of the driven roller 6 and the active roller 7 and the vertical plane is α, and α is 0-3°. The diameter ratio of the driven roller 6 and the active roller 7 is 1: 1.3. Adjusting α can match the conveying of steel strips of different thicknesses. At the same time, it can avoid deformation caused by excessive bending and extrusion when the steel strip passes between the driven roller 6 and the active roller 7. The above settings can meet the requirements of steel belt conveying 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 requirements of product parts for dimensional accuracy.

[0022] Preferably, the measuring mechanism 4 includes a bracket 22, a support wheel 20, a measuring wheel 21 and an encoder, wherein the measuring wheel 21 is located above the support wheel 20, the support wheel 20 and the measuring wheel 21 are arranged on the bracket 22, the steel belt passes between the support wheel 20 and the measuring wheel 21, and the measuring wheel 21 is connected to the encoder. The encoder collects data on the number of revolutions of the measuring wheel 21 and transmits it to the control system, which 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.

[0023] Working principle: In the initial state, the gap between the active roller 7 and the driven roller 6 is the maximum value of 3.5mm. In the working state, the telescopic cylinder 14 is set to move according to the thickness of the steel strip to be transported, and the push 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 feeding roller reaches the set value and ensures the clamping force. Provide stable measurement conditions for the measuring mechanism, improve measurement accuracy, and then improve the accuracy of feeding for the next process.

[0024] 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 device for improving the feeding accuracy of a roller steel belt, characterized in that: The invention comprises a frame (1), a feeding roller assembly (2), a driving motor (3), a measuring mechanism (4) and an adjustment system (5), wherein the feeding roller assembly (2) and the measuring mechanism (4) are arranged on the frame (1) in sequence, the feeding roller comprises a driven roller (6) and a driving roller (7), the driving roller (7) is arranged below the driven roller (6), the driving motor (3) drives the driving roller (7) to rotate, a driving gear (8) is installed on the central axis of the driving roller (7), a driven gear (9) is installed on the end of the driven roller (6), the driving gear (8) is meshed 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 the adjustment system (5) adjusts the gap and clamping force between the driving roller (7) and the driven roller (6).

2. The device for improving the feeding accuracy of a roller steel strip according to claim 1, characterized in that: 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 provided at both ends of the connecting shaft (10); the middle 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); and the other end is connected to the end of the linkage shaft (12); the adjustment system (5) comprises a gap adjustment mechanism and a gap floating mechanism; 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); and the steel belt moves from right to left.

3. The device for improving the feeding accuracy of roller steel strip according to claim 2, characterized in that: The distance between the linkage shaft (12) and the connecting shaft (10) is L, and the distance between the driven roller (6) and the connecting shaft (10) is S, L:S=2:

1. When the gap between the driven roller (6) and the active roller (7) is the largest, the driven roller (6) is located directly above the active roller (7), and the axis of the connecting shaft (10) is lower than the central axis of the driven roller (6). During operation, the driven roller (6) is close to the active roller (7), and the angle between the axis connecting the driven roller (6) and the active roller (7) and the vertical plane is α, and α is 0-3°.

4. The device for improving the feeding accuracy of a roller steel strip according to claim 3, characterized in that: The diameter ratio of the driven roller (6) to the active roller (7) is 1:1.

3.

5. The device for improving the feeding accuracy of a roller steel strip according to claim 4, characterized in that: The gap floating mechanism comprises a connecting rod (15), an adjusting nut (16), a spring (17) and a fixing plate (18); the fixing plate (18) is fixed on the bracket (22) and is located at the right end of the connecting plate (11); a connecting block (19) is provided at the left end of the connecting rod (15); an arc-shaped adjusting hole is provided on the connecting block (19); the linkage shaft (12) passes through the adjusting hole; an external thread is provided at the right end of the connecting rod (15) and the adjusting nut (16) is screwed on the adjusting spring (17) which is sleeved outside the connecting rod (15); the adjusting spring (17) is provided between the adjusting nut (16) and the fixing plate (18).

6. The device for improving the feeding accuracy of a roller steel strip according to claim 5, characterized in that: The gap adjustment mechanism comprises a push block (13) and a telescopic cylinder (14); the push block (13) abuts against the linkage shaft (12); a cylinder barrel of the telescopic cylinder (14) is fixed on the frame (1); the telescopic cylinder (14) drives the push block (13) to move left and right.

7. The device for improving the feeding accuracy of a roller steel strip according to claim 6, characterized in that: The measuring mechanism (4) comprises a bracket (22), a support wheel (20), a measuring wheel (21) and an encoder, wherein the measuring wheel (21) is located above the support wheel (20), the support wheel (20) and the measuring wheel (21) are arranged on the bracket (22), the steel belt passes between the support wheel (20) and the measuring wheel (21), and the measuring wheel (21) is connected to the encoder.

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