Precise feeding equipment for steel belt

Abstract

According to the precise feeding equipment for the steel belt, an extrusion mechanism of a feeding device comprises a pressing roller and a driving roller which are arranged up and down, a first channel is reserved between the driving roller and the pressing roller, one end of the driving roller is connected with a motor used for driving the driving roller, and the driving roller and the pressing roller are in transmission through a gear pair; the photoelectric sensing device comprises the first photoelectric sensor and the second photoelectric sensor which are vertically arranged on the side of the bearing box, after the feeding device sends out the steel belt, the steel belt can pass through the front of the first photoelectric sensor and the front of the second photoelectric sensor, the first photoelectric sensor is used for sensing the first distance between the first photoelectric sensor and the steel belt, and the second photoelectric sensor is used for sensing the second distance between the first photoelectric sensor and the steel belt. The second photoelectric sensor is used for sensing a second distance between the second photoelectric sensor and the steel belt; according to the utility model, the condition that the feeding speed is not matched with the processing speed is avoided, and the processing precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel strip feeding technology, specifically a precision feeding device for steel strips. Background Technology

[0002] Steel furniture is a common type of furniture. It is typically made of steel plates, which are formed by stamping, bending, and shearing steel strips. The feeding equipment for the steel strip includes at least one set of vertically distributed drive rollers and pressure rollers. When the steel strip is conveyed from the feeding equipment to the stamping press for forming, it passes between the drive rollers and pressure rollers, and the friction between them propels the steel strip towards the stamping press.

[0003] In existing technologies, the feeding speed of feeding equipment is preset and written into the control program, and the feeder drives the steel belt to move according to a fixed stepping speed. However, in actual production and processing, the on-site production situation is more complex. After the equipment has been running for a long time, the feeding speed and processing speed are prone to mismatch, resulting in feeding too fast or too slow, which in turn leads to a decrease in processing accuracy. Utility Model Content

[0004] To address the problem of decreased processing accuracy after prolonged operation of existing equipment, this invention provides a precision feeding device for steel strips, which avoids mismatch between feeding speed and processing speed, thereby improving processing accuracy.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a precision feeding device for steel strip, including a feeding device and a photoelectric sensing device;

[0006] The feeding device includes a carrier box, two opposing side plates are fixedly installed on the top of the carrier box, and a cover plate parallel to the top of the carrier box is connected between the two side plates. At least one extrusion mechanism for extruding steel strip is provided between the two side plates. The extrusion mechanism includes a pressure roller and a drive roller arranged vertically, and a first channel is left between the drive roller and the pressure roller. One end of the drive roller is connected to a motor for driving the drive roller, and the drive roller and the pressure roller are driven by a gear pair.

[0007] The photoelectric sensing device includes a first photoelectric sensor and a second photoelectric sensor arranged vertically on the side of the carrier box. After the feeding device delivers the steel strip, the steel strip can pass in front of the first photoelectric sensor and the second photoelectric sensor. The first photoelectric sensor is used to sense the first distance between itself and the steel strip, and the second photoelectric sensor is used to sense the second distance between itself and the steel strip.

[0008] As a further optimization of the precision feeding device for steel strip of the utility model: two mounting seats are fixedly provided on the bearing box, and the two mounting seats are connected by a mounting shaft. Two mounting blocks are slidably provided on the mounting shaft, and the position of the mounting blocks can be fixed. The first photoelectric sensor and the second photoelectric sensor are installed on the mounting blocks one-to-one.

[0009] As a further optimization of the precision feeding device for steel strip of the utility model: two support shafts are fixedly arranged between the two mounting seats, and a channel is formed between the two support shafts for the light emitted by the first photoelectric sensor and the second photoelectric sensor to pass through.

[0010] As a further optimization of a precision feeding device for steel strips according to the utility model: the feeding device includes a leveling mechanism, which includes an upper roller unit and a lower roller unit arranged vertically, and a second channel is left between the upper roller unit and the lower roller unit. Both the upper roller unit and the lower roller unit are rotatably connected to the side plate.

[0011] As a further optimization of a precision feeding device for steel strips according to the utility model: the upper roller unit includes several first rollers evenly distributed along a first straight line, the two ends of the first rollers are rotatably connected to first slide plates, the first slide plates are slidably connected to the side plate, and the cover plate is provided with an adjustment component, the adjustment component includes at least one second adjustment screw, the second adjustment screw passes through the cover plate and abuts against the first slide plate, and the second adjustment screw is fixed to the cover plate by a second adjustment nut.

[0012] As a further optimization of a precision feeding device for steel strips according to the utility model: the two ends of the pressure roller are rotatably connected to a second sliding plate, the second sliding plate is slidably connected to the side plate in a one-to-one correspondence, the two ends of the drive roller are rotatably connected to the side plate in a one-to-one correspondence, and a pre-tightening component for pushing the pressure roller downward is provided on the cover plate.

[0013] As a further optimization of a precision feeding device for steel strips according to the utility model: the pre-tightening component includes a first adjusting screw and a connecting member. One end of the first adjusting screw passes through the connecting member and is fixedly connected to the cover plate. The other end of the first adjusting screw is provided with a first adjusting nut. A return spring is sleeved on the first adjusting screw. One end of the return spring abuts against the first adjusting nut, and the other end of the return spring abuts against the connecting member. The connecting member passes through the cover plate and is fixedly connected to the second sliding plate.

[0014] As a further optimization of the precision feeding device for steel strip of the utility model: the connecting member includes two connecting shafts, one end of the two connecting shafts is connected by a connecting plate, and the connecting plate is located above the cover plate. The first adjusting screw passes through the connecting plate and is screwed to the cover plate. One end of the reset spring abuts against the connecting plate. The other ends of the two connecting shafts move through the cover plate and are connected to the second sliding plate.

[0015] As a further optimization of a precision feeding device for steel strip, the feeding device includes two first extension plates, which are connected to the side plates one-to-one. A transition roller and a slide rail are arranged between the two first extension plates. A through hole is opened on the first extension plate for the roller shaft of the transition roller to pass through. Two tube rollers are slidably arranged on the slide rail, and the steel strip can pass between the two tube rollers.

[0016] As a further optimization of the precision feeding device for steel strip of the utility model: the feeding device includes two second extension plates, which are connected to the side plates one by one. A connecting shaft is provided between the two second extension plates. Two stop wheels are sleeved on the connecting shaft. The stop wheels are coaxially connected to a positioning ring, which is sleeved on the connecting shaft. A positioning bolt is passed through the positioning ring.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1) This utility model sets up an extrusion mechanism, which includes a pressure roller and a drive roller arranged at the top and bottom, and a first channel is left between the drive roller and the pressure roller, through which the steel strip can enter. One end of the drive roller is connected to a motor for driving the drive roller, and the drive roller and the pressure roller are driven by a gear pair. When the motor rotates, it drives the drive roller to rotate together. The pressure roller drives the drive roller to rotate together through the gear pair, which helps to transport the steel strip.

[0019] 2) This utility model, by setting a first photoelectric sensor and a second photoelectric sensor, allows the steel strip to pass in front of the first and second photoelectric sensors after the feeding device delivers it. The first photoelectric sensor senses a first distance between itself and the steel strip, and the second photoelectric sensor senses a second distance between itself and the steel strip. Both the first and second photoelectric sensors are connected to a controller. The first photoelectric sensor includes a first transmitter and a first receiver, and the second photoelectric sensor includes a second transmitter and a second receiver. The light emitted by the first transmitter is reflected back by the steel strip, and the first receiver receives the reflected light to calculate the first distance between itself and the steel strip. The controller adjusts the feeding speed of the feeding device based on the first distance. Similarly, the light emitted by the second transmitter is reflected back by the steel strip, and the second receiver receives the reflected light to calculate the second distance between itself and the steel strip. The controller controls whether the feeding device feeds the steel strip based on the second distance, thus avoiding a mismatch between the feeding speed and the processing speed and improving processing accuracy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2This is a magnified view of a portion of point A;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a schematic diagram showing the connection between the drive roller, pressure roller, first roller, intermediate shaft, and second roller;

[0024] Figure 5 This is a schematic diagram showing the distribution of the transition roll, drive roll, and pressure roll;

[0025] Figure 6 This is a schematic diagram showing the coordination of the adjustment handle, pressure plate, and cover plate;

[0026] The markings in the diagram are: 1. Carrier box, 2. Side plate, 3. Cover plate, 4. First sliding plate, 5. Second sliding plate, 6. Transition roller, 7. First extension plate, 8. Slide rail, 9. Tube position wheel, 10. Adjusting handle, 11. First adjusting screw, 12. Second adjusting nut, 13. Return spring, 14. Connecting plate, 15. Connecting shaft, 16. Second adjusting screw, 17. Wheel, 18. Second extension plate, 19. Connecting shaft, 20. Thrust wheel, 21. Positioning ring, 22. Drive roller, 23. Pressure roller, 24. First roller, 25. Pressure plate, 26. Mounting seat, 27. Mounting shaft, 28. Mounting block, 29. Mounting plate, 30. Support shaft, 31. First adjusting nut, 32. Vertical hole, 33. Horizontal hole, 34. Scale bar, 35. Intermediate shaft, 36. Second roller, 37. First photoelectric sensor, 38. Second photoelectric sensor. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art.

[0028] Example 1

[0029] A precision feeding device for steel strip, such as Figures 1-4As shown, the device includes a feeding device and a photoelectric sensing device. The feeding device includes a carrier box 1, with two opposing side plates 2 fixedly mounted on top of the carrier box 1 to facilitate the installation of subsequent components on a cover plate 3. During the conveying of the steel strip, to ensure the flatness of the steel strip, a cover plate 3 parallel to the top of the carrier box 1 is connected between the two side plates 2. At least one extrusion mechanism for extruding the steel strip is provided between the two side plates 2. Two extrusion mechanisms are provided, distributed along the conveying direction of the steel strip. The extrusion mechanism includes a pressure roller 23 and a drive roller 22 arranged vertically, with a first channel between the drive roller 22 and the pressure roller 23, allowing the steel strip to enter the first channel. One end of the drive roller 22 is connected to a motor for driving the drive roller 22, and the drive roller 22 and the pressure roller 23 are driven by a gear pair. When the motor rotates, it drives the drive roller 22 to rotate together, and the pressure roller 23 drives the drive roller 22 to rotate together through the gear pair. Figure 4 As shown, a drive gear is fixedly sleeved on the drive roller 22, and a clamping gear is fixedly sleeved on the pressure roller 23. The drive gear and the clamping gear cooperate to form a gear pair. The models of the motor, drive roller 22, pressure roller 23, drive gear, and clamping gear are conventional prior art in this field and will not be described in detail here. The gear pair is also conventional prior art in this field and will not be described in detail here.

[0030] The photoelectric sensing device includes a first photoelectric sensor 37 and a second photoelectric sensor 38, which are positioned vertically on the sides of the carrier box 1. After the feeding device delivers the steel strip, the steel strip can pass in front of the first photoelectric sensor 37 and the second photoelectric sensor 38. The first photoelectric sensor 37 is used to sense a first distance between itself and the steel strip, and the second photoelectric sensor 38 is used to sense a second distance between itself and the steel strip. Both the first photoelectric sensor 37 and the second photoelectric sensor 38 are connected to a controller. The first photoelectric sensor 37 includes a first transmitter and a first receiver, and the second photoelectric sensor 38 includes a second transmitter and a second receiver. When the conveying speed of the steel strip is too slow, the distance between the steel strip delivered by the feeding device and the ground increases; when the conveying speed of the steel strip is too fast, the distance between the steel strip delivered by the feeding device and the ground decreases. The light emitted by the first transmitter is reflected back by the steel strip, and the first receiver receives the reflected light and calculates the first distance between itself and the steel strip. The controller adjusts the feeding speed of the feeding device based on the first distance. The light emitted by the second transmitter is reflected back by the steel strip. The second receiver receives the reflected light and calculates the second distance between itself and the steel strip. The controller uses this second distance to control whether the feeding device feeds the material, avoiding a mismatch between the feeding speed and the processing speed, thus improving processing accuracy. The models of the first photoelectric sensor 37 and the second photoelectric sensor 38, as well as how the first photoelectric sensor 37 and the second photoelectric sensor 38 are connected to the controller, are conventional prior art in this field and will not be described in detail here.

[0031] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments:

[0032] Example 2

[0033] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 1 and Figure 2 As shown, two mounting seats 26 are fixedly installed on the carrier box 1. The two mounting seats 26 are connected by a mounting shaft 27. Two mounting blocks 28 are slidably installed on the mounting shaft 27, and the position of the mounting blocks 28 can be fixed. The mounting blocks 28 can be engaged with the mounting shaft 27 by bolts. After the bolts pass through the mounting blocks 28, they can press against the mounting shaft 27 to fix the position of the mounting blocks 28. The first photoelectric sensor 37 and the second photoelectric sensor 38 are mounted on the mounting blocks 28 one-to-one. A mounting plate 29 is detachably connected to the mounting block 28. The first photoelectric sensor 37 or the second photoelectric sensor 38 is connected to the mounting plate 29. The surface of the mounting plate 29 where it connects to the mounting block 28 is provided with a horizontal hole 33 and a vertical hole 32. The vertical hole 32 is above the horizontal hole 33. The bolts pass through the horizontal hole 33 and the vertical hole 32 to complete the connection between the mounting plate 29 and the mounting block 28. In this way, the mounting plate 29 can be twisted to a certain extent along the vertical hole 32 to change the angle of the light emitted by the first photoelectric sensor 37 and / or the second photoelectric sensor 38. To support the mounting bases 26, two support shafts 30 are fixedly provided between the two mounting bases 26. The two support shafts 30 form a channel for the light emitted by the first photoelectric sensor 37 and the second photoelectric sensor 38 to pass through, without interfering with the use of the first photoelectric sensor 37 and the second photoelectric sensor 38.

[0034] Example 3

[0035] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figures 1 to 4 As shown, the feeding device includes a leveling mechanism, which comprises an upper roller unit and a lower roller unit arranged vertically. A second channel is provided between the upper and lower roller units, allowing the steel strip to pass through. To avoid affecting the operation of the upper and lower roller units, both units are rotatably connected to the side plate 2. The upper and lower roller units can press down on the arc-shaped steel strip, improving its straightness.

[0036] Example 4

[0037] This embodiment is an improvement on embodiment 3. Its main structure is the same as that of embodiment 3, but the improvement lies in: [The following is a more detailed description of the improvement.] Figures 3 to 6 As shown, the upper roller unit includes several first rollers 24 evenly distributed along a first straight line. There are three first rollers 24. First slide plates 4 are rotatably connected to both ends of each first roller 24. The first slide plates 4 are slidably connected to the side plate 2. An adjustment assembly is provided on the cover plate 3. The adjustment assembly includes at least one second adjustment screw 16. A wheel 17 is fixed to one end of the second adjustment screw 16 located above the cover plate 3 for easy manual operation. The second adjustment screw 16 passes through the cover plate 3 and abuts against the first slide plate 4. The second adjustment screw 16 is fixed to the cover plate 3 by a second adjustment nut 12. The second adjustment nut 12 is fixed to the cover plate 3 and screwed onto the cover plate 3. Rotating the wheel 17 causes the second adjustment screw 16 to rotate downwards. The second adjustment screw 16 is rotatably connected to the second slide plate 5, causing the second slide plate 5 to move downwards. To determine the downward distance of the second slide plate 5, a scale bar 34 corresponding to the second adjustment screw 16 is provided on the side plate 2.

[0038] The lower roller unit includes multiple second rollers 36 distributed along a second straight line, with a distance between the first roller 24 and the second roller 36 forming a second channel. There are four second rollers 36. A gear A is fixedly fitted at both ends of each second roller 36. Multiple intermediate shafts 35, corresponding one-to-one with each second roller 36, are rotatably arranged on the inner side of the side plate 2, with each intermediate shaft 35 located below the second roller 36. A gear B is fixedly fitted on each intermediate shaft 35, and the A and B gears mesh. There are four second rollers 36 and four intermediate shafts 35. Two second rollers 36 and two intermediate shafts 35 corresponding to the second rollers 36 form a group with one of the drive rollers 22. A transmission gear is fixedly fitted at the end of each of the two drive rollers 22 without a drive gear. The two transmission gears are connected by a chain drive. In this case, only one motor is needed. When the motor drives the drive gear on one of the drive rollers 22 to rotate, the other drive roller 22 will also rotate. When the drive gear rotates, a B gear meshes with it. This B gear rotates, which in turn drives the A gear meshing with it to rotate. The rotation direction of the A gear is the same as that of the drive roller 22. At this time, the rotation direction of the second roller 36 is also the same as that of the drive roller 22. When the A gear rotates, it drives another B gear to rotate. This B gear then drives the A gear meshing with it to rotate, so that the rotation direction of the A gear is the same as that of the drive roller 22. At this time, the rotation direction of the second roller 36 is also the same as that of the drive roller 22. The operation of the other drive roller 22 is the same.

[0039] To allow adjustment of the distance between the drive roller 22 and the pressure roller 23 in case of emergency, a pressure plate 25 is provided between the cover plate 3 and the pressure roller 23. The pressure plate 25 is fixedly connected to the first slide plate 4. An adjustment handle 10 is provided on the cover plate 3, and an extension shaft is rotatably mounted on the adjustment handle 10. The extension shaft passes through the cover plate 3 and is fixedly connected to the pressure plate 25. The part of the adjustment handle 10 that contacts the cover plate 3 is an arc surface. An adjustment spring is fitted on the part of the extension shaft that passes through the cover plate 3. Rotating the adjustment handle 10 causes the extension shaft to move to a certain extent, which in turn causes the pressure plate 25 to move to a certain extent. The two ends of the adjustment spring are connected to the pressure plate 25 and the bottom surface of the cover plate 3, respectively, to help the pressure plate 25 return to its original position.

[0040] Example 5

[0041] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 1 , Figure 3 and Figure 5 As shown, the two ends of the pressure roller 23 are rotatably connected to the second slide plate 5, which is slidably connected to the side plate 2 in a corresponding manner. The two ends of the drive roller 22 are rotatably connected to the side plate 2 in a corresponding manner. The cover plate 3 is provided with a pre-tightening assembly for pushing the pressure roller 23 downward. By adjusting the pre-tightening force, the pre-tightening assembly allows the second slide plate 5 to slide to a suitable position on the side plate 2, thereby changing the size of the first channel and ensuring the smooth passage of the steel strip. The models of the motor, drive roller 22, pressure roller 23, drive gear, and clamping gear are conventional existing technologies in the art and will not be described in detail here. The gear pairs are also conventional existing technologies in the art and will not be described in detail here.

[0042] The pre-tightening assembly includes a first adjusting screw 11 and a connecting member. One end of the first adjusting screw 11 passes through the connecting member and is fixedly connected to the cover plate 3. The other end of the first adjusting screw 11 is provided with a first adjusting nut 31. A return spring 13 is sleeved on the first adjusting screw 11. One end of the return spring 13 abuts against the first adjusting nut 31, and the other end abuts against the connecting member. The connecting member passes through the cover plate 3 and is fixedly connected to the second sliding plate 5. By turning the first adjusting nut 31 on the first adjusting screw 11, the return spring 13 is compressed. At this time, in order to reset, the other end of the return spring 13 will push against the connecting member and move, causing the connecting member to drive the first sliding plate 4 to slide on the side plate 2, thereby changing the distance between the pressure roller 23 and the drive roller 22.

[0043] The connector includes two connecting shafts 15, one end of which is connected by a connecting plate 14, and the connecting plate 14 is located above the cover plate 3. The first adjusting screw 11 passes through the connecting plate 14 and is screwed to the cover plate 3. One end of the return spring 13 abuts against the connecting plate 14. The other ends of the two connecting shafts 15 move through the cover plate 3 and are connected to the second sliding plate 5.

[0044] Example 6

[0045] This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1, but the improvement lies in: [The following is a more detailed description of the improvement.] Figure 5 and Figure 6 As shown, the feeding device includes two first extension plates 7, which are connected one-to-one with the side plates 2. The two first extension plates 7 are close to the feeding direction, and a parallel transition roller 6 and a slide rail 8 are arranged between the two first extension plates 7. When conveying the steel strip, the steel strip enters the first channel and the second channel with the help of the transition roller 6. The first extension plate 7 has through holes for the roller shaft of the transition roller 6 to pass through, which facilitates the installation of the transition roller 6. Two tube rollers 9 are slidably arranged on the slide rail 8, and the steel strip can pass between the two tube rollers 9. The distance between the two tube rollers 9 can be adjusted according to the actual width of the steel strip, which can perform a certain degree of leveling when the steel strip is fed. The specific structure, model and working principle of the tube roller 9, how the tube roller 9 is installed on the slide rail 8, and the model of the transition roller 6 are conventional existing technology in this field, and will not be described in detail here.

[0046] Example 7

[0047] This embodiment is an improvement on Embodiment 1. Its main structure is the same as Embodiment 1, but the improvement lies in the following: the feeding device includes two second extension plates 18, which are connected one-to-one with the side plates 2. The two second extension plates 18 are close to the discharge direction, and a connecting shaft 19 is provided between them. Two guide wheels 20 are sleeved on the connecting shaft 19. The distance between the two guide wheels 20 is adjusted according to the width of the steel strip, enabling a certain degree of leveling during steel strip discharge. To ensure convenient adjustment of the distance between the guide wheels 20 and convenient fixing of the guide wheels 20 positions, a positioning ring 21 is coaxially connected to the guide wheels 20, and the positioning ring 21 is sleeved on the connecting shaft 19. A positioning bolt passes through the positioning ring 21. The positioning bolt fixes the positioning ring 21 to a suitable position on the connecting shaft 19.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precision feeding device for steel strip, characterized in that: Includes a feeding device and a photoelectric sensing device; The feeding device includes a carrier box (1), and two opposing side plates (2) are fixedly installed on the top of the carrier box (1). A cover plate (3) parallel to the top of the carrier box (1) is connected between the two side plates (2). At least one extrusion mechanism for extruding steel strip is provided between the two side plates (2). The extrusion mechanism includes a pressure roller (23) and a drive roller (22) arranged vertically. A first channel is left between the drive roller (22) and the pressure roller (23). One end of the drive roller (22) is connected to a motor for driving the drive roller (22). The drive roller (22) and the pressure roller (23) are driven by a gear pair. The photoelectric sensing device includes a first photoelectric sensor (37) and a second photoelectric sensor (38) arranged vertically on the side of the carrier box (1). After the feeding device sends out the steel strip, the steel strip can pass in front of the first photoelectric sensor (37) and the second photoelectric sensor (38). The first photoelectric sensor (37) is used to sense the first distance between itself and the steel strip, and the second photoelectric sensor (38) is used to sense the second distance between itself and the steel strip.

2. The precision feeding device for steel strip as described in claim 1, characterized in that: Two mounting seats (26) are fixedly provided on the carrier box (1). The two mounting seats (26) are connected by a mounting shaft (27). Two mounting blocks (28) are slidably provided on the mounting shaft (27), and the position of the mounting blocks (28) can be fixed. The first photoelectric sensor (37) and the second photoelectric sensor (38) are installed on the mounting blocks (28) one by one.

3. The precision feeding device for steel strip as described in claim 2, characterized in that: Two support shafts (30) are fixedly disposed between the two mounting bases (26), and a channel is formed between the two support shafts (30) for light emitted by the first photoelectric sensor (37) and the second photoelectric sensor (38) to pass through.

4. The precision feeding device for steel strip as described in claim 1, characterized in that: The feeding device includes a leveling mechanism, which includes an upper roller unit and a lower roller unit arranged vertically, and a second channel is left between the upper roller unit and the lower roller unit. Both the upper roller unit and the lower roller unit are rotatably connected to the side plate (2).

5. The precision feeding device for steel strip as described in claim 4, characterized in that: The upper roller unit includes several first rollers (24) evenly distributed along a first straight line. The two ends of the first rollers (24) are rotatably connected to first slide plates (4). The first slide plates (4) are slidably connected to the side plate (2). An adjustment component is provided on the cover plate (3). The adjustment component includes at least one second adjustment screw (16). The second adjustment screw (16) passes through the cover plate (3) and abuts against the first slide plate (4). The second adjustment screw (16) is fixed to the cover plate (3) by a second adjustment nut (12).

6. The precision feeding device for steel strip as described in claim 1, characterized in that: The two ends of the pressure roller (23) are rotatably connected to the second slide plate (5), and the second slide plate (5) is slidably connected to the side plate (2) in a one-to-one correspondence. The two ends of the drive roller (22) are rotatably connected to the side plate (2) in a one-to-one correspondence. The cover plate (3) is provided with a pre-tightening component for pushing the pressure roller (23) downward.

7. The precision feeding device for steel strip as described in claim 6, characterized in that: The pre-tightening assembly includes a first adjusting screw (11) and a connector. One end of the first adjusting screw (11) passes through the connector and is fixedly connected to the cover plate (3). The other end of the first adjusting screw (11) is provided with a first adjusting nut (31). A return spring (13) is sleeved on the first adjusting screw (11). One end of the return spring (13) abuts against the first adjusting nut (31), and the other end of the return spring (13) abuts against the connector. The connector passes through the cover plate (3) and is fixedly connected to the second sliding plate (5).

8. The precision feeding device for steel strip as described in claim 7, characterized in that: The connector includes two connecting shafts (15), one end of which is connected by a connecting plate (14), and the connecting plate (14) is located above the cover plate (3). The first adjusting screw (11) passes through the connecting plate (14) and is screwed to the cover plate (3). One end of the reset spring (13) rests on the connecting plate (14), and the other ends of the two connecting shafts (15) move through the cover plate (3) and are connected to the second sliding plate (5).

9. The precision feeding device for steel strip as described in claim 1, characterized in that: The feeding device includes two first extension plates (7), which are connected one-to-one with the side plate (2). A transition roller (6) and a slide rail (8) are arranged between the two first extension plates (7). The first extension plate (7) has a through hole for the roller shaft of the transition roller (6) to pass through. Two tube rollers (9) are slidably arranged on the slide rail (8). The steel belt can pass between the two tube rollers (9).

10. The precision feeding device for steel strip as described in claim 1, characterized in that: The feeding device includes two second extension plates (18), which are connected to the side plate (2) in a one-to-one correspondence. A connecting shaft (19) is provided between the two second extension plates (18). Two stop wheels are sleeved on the connecting shaft (19). The stop wheels are coaxially connected to a positioning ring, and the positioning ring is sleeved on the connecting shaft (19). A positioning bolt is passed through the positioning ring.

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