A semi-tow pre-stocking feeding device

Abstract

The application discloses a kind of semi-drawing pre-stored material feeding device, it is related to the field of coiled material processing feeding technology, including rack, the material belt conveying direction in sequence of laying and pre-stored material buffer mechanism of pay-off mechanism, and control unit;Pay-off mechanism is equipped with the tension control unit for applying reverse damping to pay-off shaft, realizes pay-off tension control, pre-stored material buffer mechanism is equipped with vertical storage bin, and material belt forms adjustable material belt buffer section in storage bin to isolate front pay-off resistance and rear end cutting traction, and control unit is closed loop controlled pay-off mechanism by the feedback of material level detection unit, realizes the asynchronous operation of pay-off and traction feeding.This device can be directly connected with existing cutting device with traction mechanism, effectively avoid material belt stretch deformation and pay-off disorder problem, greatly reduce equipment modification cost, suitable for film, cloth, flexible sheet and other coiled material fixed-length cutting feeding processing.

Description

Technical Field

[0001] This invention relates to the field of feeding technology for rolled materials processing, and in particular to a semi-traction pre-storage feeding device. Background Technology

[0002] In the process of cutting roll materials such as films, fabrics, and flexible sheets to a fixed length, most commercial cutting equipment has integrated a traction mechanism that is responsible for pulling and conveying the material strip to the cutting station to complete the processing. In the current production mode, the unpowered feeding rack is usually placed directly at the feeding end of the cutting device, and the roll material is mounted on the unpowered feeding shaft. The cutting device's own traction mechanism directly pulls the material strip forward for conveying.

[0003] However, the aforementioned existing technologies have the following significant technical defects in actual production applications: 1. The material strip is easily stretched and deformed, resulting in poor dimensional accuracy. When the traction mechanism of the cutting device pulls the material strip, it needs to continuously overcome the rotational inertia of the front roll of material and the frictional resistance of the unloading shaft. Especially for flexible material strips with high ductility, the traction force can easily cause the material strip to be stretched and deformed. This not only causes positive and negative deviations in the dimensions of the cut product, but also damages the structural performance of the material strip itself, significantly reducing the product qualification rate.

[0004] 2. Uncontrolled feeding inertia can easily lead to material scrambling and slippage. The unpowered feeding shaft lacks effective closed-loop tension control. When the traction mechanism of the cutting device stops traction, the roll will continue to feed due to its own rotational inertia, resulting in loose, stacked, or even disordered material. When feeding is restarted, the loose material is very likely to slip and misposition at the traction roller of the cutting device, making it impossible to guarantee the consistency of feeding accuracy during continuous production.

[0005] 3. High cost of modifying existing equipment. Replacing the entire set of equipment, including independent traction and cutting, with new equipment to solve the above problems would not only result in high equipment procurement costs, but also leave the original cutting equipment idle and wasted. Modifying the traction system of the existing cutting equipment would be technically difficult and would damage the structure and precision of the original equipment. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a semi-traction pre-storage feeding device to solve the problems of easy stretching of the material belt, low feeding positioning accuracy, easy loss of control of material release inertia, and high cost of modifying existing equipment.

[0007] A semi-traction pre-storage feeding device includes a frame, a feeding mechanism, a pre-storage buffer mechanism, and a control unit; the semi-traction pre-storage feeding device is independently installed at the feeding end of the cutting device and is used in conjunction with the traction mechanism of the cutting device. The feeding mechanism and the pre-storage buffer mechanism are arranged sequentially along the conveying direction of the material belt and installed on the frame; the control unit is electrically connected to the feeding mechanism and the pre-storage buffer mechanism respectively, and the control unit is electrically connected to the traction mechanism of the cutting device to realize linkage control; The feeding mechanism includes a feeding shaft and a tension control unit that is drivenly connected to the feeding shaft. The feeding shaft is used to mount the roll of material to be processed, and the tension control unit is used to apply a constant and adjustable reverse damping torque to the feeding shaft to limit the feeding inertia and achieve uniform feeding. The pre-storage buffer mechanism includes a storage bin and a material level detection unit installed in the storage bin. The material belt output from the discharge mechanism hangs into the storage bin to form an adjustable length buffer section. The material level detection unit is used to detect the material belt reserve in the buffer section in real time and feed it back to the control unit. The control unit controls the feeding process in a closed loop based on the signal from the material level detection unit, so that the feeding process runs asynchronously with the feeding process of the traction mechanism of the cutting device, and reserves a sufficient amount of resistance-free material strip in advance for the traction mechanism of the cutting device to pull and transport it to the cutting station at a uniform speed.

[0008] In this invention, the tension control unit adopts a magnetic powder brake, the output shaft of the magnetic powder brake is coaxially and fixedly connected to the feeding shaft, and the control end of the magnetic powder brake is electrically connected to the control unit; the control unit adjusts the output value of the reverse damping torque by adjusting the excitation current of the magnetic powder brake, thereby achieving constant control of the feeding tension.

[0009] In this invention, the feeding mechanism further includes a feeding guide roller group, which is rotatably mounted on the frame and located between the feeding shaft and the storage bin, for guiding and leveling the material strip in the feeding path.

[0010] In this invention, the material level detection unit includes at least two sets of photoelectric sensors. Multiple sets of photoelectric sensors are arranged vertically at intervals on the side wall of the storage silo, respectively used to detect the upper limit material level, lower limit material level, and warning material level of the buffer section material belt. The control unit controls the start and stop of the feeding mechanism and the feeding speed of the feeding mechanism in a closed loop according to the material level signal of the photoelectric sensors, so that the feeding process does not need to be strictly synchronized with the traction feeding process of the back-end cutting device.

[0011] In this invention, the pre-storage buffer mechanism further includes a storage feed guide roller and a storage discharge guide roller. The storage feed guide roller is rotatably mounted on the top of the feed end of the storage bin, and the storage discharge guide roller is rotatably mounted on the top of the discharge end of the storage bin. The material strip is lowered into the storage bin through the storage feed guide roller to form a buffer section, and then guided upward through the storage discharge guide roller to the traction mechanism of the cutting device.

[0012] Furthermore, the control unit adaptively adjusts the excitation current of the magnetic powder brake based on the real-time change in diameter during the unwinding process, ensuring that the unwinding tension remains constant throughout the entire process.

[0013] In this invention, the control unit includes a human-machine interface touch screen, a PLC controller, and a drive circuit. The PLC controller is electrically connected to the human-machine interface touch screen, the drive circuit, the tension control unit, and the material level detection unit, and the PLC controller has a reserved communication interface with the cutting device traction mechanism.

[0014] In this invention, the bottom of the frame is equipped with adjustable feet and casters to facilitate the movement and horizontal adjustment of the device, enabling quick docking with different models of cutting devices.

[0015] The beneficial effects of this invention are: The semi-traction pre-storage feeding device provided by the present invention completely isolates the front-end feeding resistance from the traction feeding of the rear-end cutting device through the material belt buffer section formed by the pre-storage buffer mechanism. This allows the traction mechanism of the cutting device to drive the unresistance material belt in the buffer section without having to overcome the rotational inertia of the whole roll and the feeding friction resistance. This fundamentally avoids the problem of material belt stretching and deformation caused by traction force, ensuring the dimensional accuracy of the cut products and the structural performance of the material belt itself, and greatly improving the product qualification rate. By using a feeding mechanism with a tension control unit in conjunction with a material level detection unit for closed-loop control, constant tension control and precise start-stop management are achieved during the feeding process. This effectively limits the feeding inertia of the roll material and solves the problems of loose material strip, disordered stacking, traction slippage and positioning inaccuracy that are prone to occur during unpowered feeding, thus ensuring the consistency of feeding accuracy during continuous production. Meanwhile, this device can be directly and quickly connected with various existing cutting devices with built-in traction mechanisms without replacing the entire set of production equipment or making structural modifications to the traction system of the original cutting equipment. This greatly reduces the cost of equipment modification, avoids the idle waste of the original equipment, and has strong adaptability and wide applicability. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an installation structure diagram of the semi-traction pre-storage feeding device in this embodiment; Figure 2 This is a side view of the installation structure of the semi-traction pre-storage feeding device in this embodiment; Figure 3 This is a schematic diagram of the overall structure of the semi-traction pre-storage feeding device in this embodiment; Figure 4 This is a cross-sectional view of the semi-traction pre-storage feeding device in this embodiment; Figure 5 This is a block diagram of the control unit module of the semi-traction pre-storage feeding device in this embodiment; The attached figures are labeled as follows: 1-frame, 2-feeding mechanism, 201-feeding shaft, 202-magnetic powder brake, 203-feeding guide roller group, 3-pre-storage buffer mechanism, 301-storage bin, 302-photoelectric sensor, 303-storage feed guide roller, 304-storage discharge guide roller, 4-control unit, 401-PLC controller, 402-human-machine interaction touch screen, 5-cutting device, 501-traction mechanism, 502-cutting mechanism. Detailed Implementation

[0017] This invention provides a semi-traction pre-storage feeding device. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] like Figures 1 to 5 As shown, This embodiment provides a semi-traction pre-storage feeding device, which includes a frame 1, a feeding mechanism 2, a pre-storage buffer mechanism 3, and a control unit 4.

[0020] The frame 1 is made of welded steel, which provides stable installation support for the entire device. The bottom of the frame 1 is equipped with adjustable feet and casters, which facilitates the movement and horizontal adjustment of the device and can be quickly connected with cutting devices 5 of different models and heights.

[0021] The feeding mechanism 2 and the pre-storage buffer mechanism 3 are arranged sequentially from front to back along the conveying direction of the material belt and fixedly installed on the frame 1; the control unit 4 is installed on the operating side of the frame 1 and is electrically connected to the feeding mechanism 2 and the pre-storage buffer mechanism 3 respectively. The control unit 4 has a reserved standard communication interface, which can be electrically connected to the traction mechanism 501 of the cutting device 5 to realize linkage control.

[0022] In this embodiment, the feeding mechanism 2 includes a feeding shaft 201, a tension control unit, and a feeding guide roller group 203. The feeding shaft 201 is horizontally rotatably mounted on the front end of the frame 1 via a bearing seat and is used to mount the coil to be processed. The end of the feeding shaft 201 is provided with a quick-locking chuck, which can quickly fix coils of different inner diameters. The tension control unit adopts a magnetic powder brake 202, which is fixed to the frame 1 by a bracket. Its output shaft is coaxially fixedly connected to the feeding shaft 201, and the control end of the magnetic powder brake 202 is connected to the control unit. The control unit 4 is electrically connected. By adjusting the excitation current of the magnetic powder brake 202, the control unit 4 can adjust the output value of the reverse damping torque, apply a constant and adjustable resistance to the feeding shaft 201, limit the feeding inertia of the roll, and achieve uniform feeding and constant tension control. The feeding guide roller group 203 includes multiple parallel guide rollers, all of which are rotatably mounted on the frame 1 through bearing seats and located between the feeding shaft 201 and the pre-storage buffer mechanism 3. It is used to guide and level the material belt in the feeding path to avoid deviation during the material belt conveying process.

[0023] In this embodiment, the pre-storage buffer mechanism 3 includes a storage bin 301, a material level detection unit, a storage feed guide roller 303, and a storage discharge guide roller 304. The storage bin 301 is a vertical bin structure that runs vertically through the machine frame 1 and is located between the feeding mechanism 2 and the cutting device 5. The storage feed guide roller 303 is rotatably mounted on the top of the feeding end of the storage bin 301, and the storage discharge guide roller 304 is rotatably mounted on the top of the discharge end of the storage bin 301. The material strip output from the feeding guide roller group 203 hangs down into the storage bin 301 through the storage feed guide roller 303, forming an adjustable length material strip buffer section. Then, it is guided upward through the storage discharge guide roller 304 to the traction mechanism 501. The material strip buffer section isolates the front-end feeding resistance from the rear-end traction feeding, so that the traction mechanism 501 of the cutting device does not need to overcome the rolling resistance.

[0024] In this embodiment, the material level detection unit includes three sets of photoelectric sensors 302. The three sets of photoelectric sensors 302 are fixed vertically from top to bottom on the inner side wall of the storage bin 301, respectively corresponding to the upper limit material level, lower limit material level, and warning material level of the buffer section material strip. All three sets of photoelectric sensors 302 are electrically connected to the control unit 4 to detect the material strip reserve in the buffer section in real time and feed it back to the control unit 4. The control unit 4 controls the start and stop of the feeding mechanism 2 and the feeding speed in a closed loop according to the material level signal of the photoelectric sensors 302. When the material strip drops to the lower limit material level, the control unit 4 controls the feeding mechanism 2 to start feeding and replenishing material. When the material strip rises to the upper limit material level, the control unit 4 controls the feeding mechanism 2 to stop feeding material. This makes the feeding process asynchronous with the traction feeding process of the back-end cutting device 5, without strict synchronization, which greatly simplifies the control logic.

[0025] In this embodiment, the control unit 4 includes a human-machine interface touch screen 402, a PLC controller 401, and a drive circuit. The PLC controller 401 is electrically connected to the human-machine interface touch screen 402, the drive circuit, the magnetic powder brake 202, and the photoelectric sensor 302. The PLC controller 401 adaptively adjusts the excitation current of the magnetic powder brake 202 according to the real-time change in the diameter of the roll during the unwinding process, ensuring that the unwinding tension is constant throughout the process and avoiding tension fluctuations caused by the reduction in the diameter of the roll. Operators can quickly set processing parameters such as unwinding tension and material level threshold in the storage bin 301 through the human-machine interface touch screen 402 to adapt to different production needs.

[0026] The complete workflow of the semi-traction pre-storage feeding device provided in this embodiment is as follows: S1. Equipment docking: Push the semi-traction pre-storage feeding device to the feeding end of the existing cutting device 5, adjust the adjustable feet at the bottom of the frame 1 to make the device level, and align the storage discharge guide roller 304 with the feeding port of the traction mechanism 501 of the cutting device 5; connect the communication interface of the control unit 4 to the control system of the cutting device 5 to realize the linkage signal transmission.

[0027] S2. Material preparation: The roll of material to be processed is placed on the feeding shaft 201 and fixed by the quick-locking chuck. The free end of the material strip passes through the feeding guide roller group 203 and the storage feed guide roller 303 in sequence, and hangs down into the storage bin 301 to form a buffer section of the material strip. Then it passes through the storage discharge guide roller 304 and enters the traction roller pressing gap of the traction mechanism 501, and is finally pulled to the cutting station of the cutting mechanism 502.

[0028] S3. Parameter setting: Through the human-machine interaction touch screen 402, the initial damping torque of the magnetic powder brake 202, the upper limit material level, the lower limit material level and the warning material level threshold in the storage bin 301 are set according to the material, thickness and width of the material strip to be processed, so as to complete the parameter configuration before processing.

[0029] S4. Pre-storage process: Upon starting the device, the control unit 4 first controls the magnetic powder brake 202 to output reverse damping according to the set torque, and at the same time sends a pre-storage signal to the cutting device 5, controls the traction mechanism 501 to run at low speed, pulls the material belt forward, and synchronously drives the feeding shaft 201 to rotate and feed the material. The sag of the material belt in the storage bin 301 gradually increases. When the photoelectric sensor 302 at the top detects that the material belt in the buffer section has reached the set upper limit, the control unit 4 controls the feeding mechanism 2 to stop feeding, and at the same time sends a pre-storage completion signal to the cutting device 5, thus completing the pre-storage process and reserving a sufficient amount of resistance-free material belt for subsequent feeding.

[0030] S5. Semi-traction feeding and linkage cutting process: After receiving the pre-storage completion signal, the cutting device 5 operates normally at the set production speed. Its own traction mechanism 501 uniformly pulls the resistance-free material belt in the storage bin 301 forward to the cutting mechanism 502. At this time, the traction mechanism 501 only needs to drive a small amount of material belt in the buffer section. It does not need to overcome the rotational inertia of the front roll and the feeding resistance. The material belt has no stretching deformation and the feeding accuracy is stable. As the material belt continues to be conveyed, the sag of the material belt in the buffer section of the storage bin 301 gradually decreases. When the photoelectric sensor 302 in the middle detects that the material belt has dropped to the set lower limit material level, the control unit 4 controls the magnetic powder brake 202 to adjust the damping torque and drive the feeding shaft 201 to start feeding and replenishing material again until the material belt returns to the upper limit material level. This cycle is repeated to realize the asynchronous operation of feeding and traction. When the material level drops to the lowest warning level, the control unit 4 sends a stop warning signal to the cutting device 5 to remind the operator to check the feeding fault and avoid the equipment from running idle.

[0031] S6. Tension Adaptive Adjustment: During continuous production, as the roll material is continuously unloaded, the roll diameter gradually decreases. The control unit 4 calculates the remaining diameter of the roll material in real time based on the unloading time and the feeding speed of the cutting device 5, and adaptively adjusts the output damping torque of the magnetic powder brake 202 to ensure that the unloading tension remains constant, avoids fluctuations in unloading tension caused by changes in the roll diameter, and further improves feeding stability.

[0032] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. A semi-traction pre-storage feeding device, characterized in that, It includes a frame, a feeding mechanism, a pre-storage buffer mechanism, and a control unit; the semi-traction pre-storage feeding device is independently installed at the feeding end of the cutting device and is used in conjunction with the traction mechanism of the cutting device. The feeding mechanism and the pre-storage buffer mechanism are arranged sequentially along the conveying direction of the material belt and installed on the frame; the control unit is electrically connected to the feeding mechanism and the pre-storage buffer mechanism respectively, and the control unit is electrically connected to the traction mechanism of the cutting device to realize linkage control; The feeding mechanism includes a feeding shaft and a tension control unit that is drivenly connected to the feeding shaft. The feeding shaft is used to mount the roll of material to be processed, and the tension control unit is used to apply a constant and adjustable reverse damping torque to the feeding shaft to limit the feeding inertia and achieve uniform feeding. The pre-storage buffer mechanism includes a storage bin and a material level detection unit installed in the storage bin. The material belt output from the discharge mechanism hangs into the storage bin to form an adjustable length buffer section. The material level detection unit is used to detect the material belt reserve in the buffer section in real time and feed it back to the control unit. The control unit controls the feeding process in a closed loop based on the signal from the material level detection unit, so that the feeding process runs asynchronously with the feeding process of the cutting device traction mechanism, and reserves a sufficient amount of resistance-free material strip in advance for the cutting device traction mechanism to pull and transport it to the cutting station at a uniform speed.

2. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The tension control unit employs a magnetic powder brake, the output shaft of which is coaxially and fixedly connected to the feeding shaft, and the control terminal of which is electrically connected to the control unit. The control unit adjusts the output value of the reverse damping torque by regulating the excitation current of the magnetic powder brake, thereby achieving constant control of the feeding tension.

3. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The feeding mechanism also includes a feeding guide roller group, which is rotatably mounted on the frame and located between the feeding shaft and the storage bin, for guiding and leveling the material strip in the feeding path.

4. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The material level detection unit includes at least two sets of photoelectric sensors. Multiple sets of photoelectric sensors are arranged vertically at intervals on the side wall of the storage silo, and are used to detect the upper limit material level, lower limit material level, and warning material level of the buffer section material belt, respectively. The control unit controls the start and stop of the feeding mechanism and the feeding speed of the feeding mechanism in a closed loop according to the material level signal of the photoelectric sensors, so that the feeding process does not need to be strictly synchronized with the traction feeding process of the back-end cutting device.

5. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The pre-storage buffer mechanism further includes a storage feed guide roller and a storage discharge guide roller. The storage feed guide roller is rotatably mounted on the top of the feed end of the storage bin, and the storage discharge guide roller is rotatably mounted on the top of the discharge end of the storage bin. The material strip is lowered into the storage bin through the storage feed guide roller to form a buffer section, and then guided upward through the storage discharge guide roller to the traction mechanism of the cutting device.

6. The semi-traction pre-storage feeding device according to claim 2, characterized in that, The control unit adaptively adjusts the excitation current of the magnetic powder brake according to the real-time changes in the diameter of the coil during the unwinding process, ensuring that the unwinding tension remains constant throughout the process.

7. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The control unit includes a human-machine interface touch screen, a PLC controller, and a drive circuit. The PLC controller is electrically connected to the human-machine interface touch screen, the drive circuit, the tension control unit, and the material level detection unit, and the PLC controller has a reserved communication interface with the cutting device traction mechanism.

8. The semi-traction pre-storage feeding device according to claim 1, characterized in that, The bottom of the frame is equipped with adjustable feet and casters, which facilitates the movement and horizontal adjustment of the device and enables quick docking with different models of cutting devices.

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