Air cushion furnace strip deviation rectifying device and method based on tension compensation

Abstract

The invention provides an air cushion furnace strip deviation rectifying device and method based on tension compensation, and the device and method are used for rectifying deviation of strips. The deviation rectifying frame is arranged on the fixed rack; the deviation rectifying roller is arranged on the deviation rectifying frame; the strip position sensor is arranged at the output end of the strip and used for detecting the position of the strip and sending a first detection signal; the console is used for generating a first control signal according to the first detection signal; and one end of the hydraulic cylinder is arranged on the fixed rack, the other end of the hydraulic cylinder is arranged on the deviation rectifying frame, and the deviation rectifying frame is driven according to the first control signal. The deviation rectifying device has the beneficial effects that the belt breakage preventing roller and the deviation rectifying roller act synergistically, tension distribution of the belt is adjusted synchronously during deviation rectifying, and belt breakage caused by local stress concentration is effectively avoided; in combination with the position of the strip and the displacement of the deviation rectifying roller, the control console can recognize deviation caused by mechanical clearance or hydraulic drift, and a more accurate control signal is generated.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing, and in particular relates to an air cushion furnace strip correction device and method based on tension compensation. Background Art

[0002] In a continuous heat treatment line for aluminum alloy automotive sheet, the heat treatment furnace is an air cushion suspension furnace. Inside the 110-meter-long air cushion furnace, the aluminum alloy strip floats on an air cushion formed by a fan at the furnace's bottom. This causes the strip to easily deviate. A corrective device must be installed at the furnace's exit. However, existing corrective devices on the market are prone to breaking due to the high temperature of the strip inside the furnace, especially with thin material. During the correction process, if the corrective roller deviates to one side, tension is applied only to one side of the strip. This makes the strip extremely susceptible to breaking. If a strip breaks in the air cushion furnace, the plant must be shut down, wait for the furnace temperature to cool, and then manually reconnect the broken strip. This not only results in the scrapping of the broken strip but also disrupts production, causing significant losses to the factory. Therefore, a device and method for correcting strip deviation in an air cushion furnace is urgently needed to address this issue. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides an air cushion furnace strip correction device and method based on tension compensation, which is particularly suitable for correcting the strips produced by the air cushion furnace of the continuous heat treatment production line of aluminum alloy automobile plates, and also has the function of preventing strip breakage.

[0004] The technical solution adopted by the present invention is as follows: In a first aspect, a strip deviation correction device for an air cushion furnace based on tension compensation is provided, which is used to correct the strip deviation, comprising: Fixed rack; A correction frame is provided on the fixed frame; A correction roller is provided on the correction frame; a strip position sensor, disposed at one end of the strip output, for detecting the position of the strip and sending a first detection signal; a console, configured to generate a first control signal according to the first detection signal; A hydraulic cylinder, one end of which is arranged on the fixed frame, and the other end of which is arranged on the correction frame, drives the correction frame according to the first control signal.

[0005] Furthermore, it also includes: An anti-belt breakage frame connected to the deviation-correcting frame; The anti-belt break roller is arranged on the anti-belt break frame.

[0006] Furthermore, it also includes: a displacement sensor for detecting the displacement of the correction roller and sending a second detection signal, the console generates a second control signal based on the combination of the first detection signal and the second detection signal, and the hydraulic cylinder drives the correction frame according to the second control signal.

[0007] Furthermore, the deviation-correcting frame and the anti-belt-breakage frame are connected via an angle adjustment mechanism, and the angle adjustment mechanism is used to adjust the axial angle between the deviation-correcting frame and the anti-belt-breakage frame.

[0008] Furthermore, the angle adjustment mechanism is locked by a locking bolt.

[0009] In a second aspect, a method for correcting strip deviation in an air cushion furnace based on tension compensation is provided, comprising the following steps: Adjust the angle adjustment mechanism so that the axial angle between the deviation correction frame and the anti-breaking frame reaches a set angle; The deviation-correcting roller receives the strip and outputs it to the anti-breaking roller, and the strip position sensor detects the position of the strip at the output end of the anti-breaking roller; When the strip position sensor detects that the strip is deviated, the first detection signal is generated and sent to the console; The console generates the first control signal according to the first detection signal and sends the first control signal to the hydraulic cylinder; The hydraulic cylinder drives the deviation-correcting frame according to the first control signal, thereby driving the deviation-correcting roller and the anti-breaking roller to move so as to return the strip to the correct position.

[0010] Furthermore, the method further comprises the following steps: When the displacement sensor detects that the deviation-correcting roller has shifted, it generates a second detection signal and sends it to the console; The console generates the second control signal based on the combination of the first detection signal and the second detection signal, and sends the second control signal to the hydraulic cylinder; The hydraulic cylinder drives the deviation-correcting frame according to the second control signal, thereby driving the deviation-correcting roller and the anti-breaking roller to move so as to return the strip to the correct position.

[0011] The advantages and positive effects of the present invention are as follows: due to the adoption of the above-mentioned technical scheme, the anti-break roller and the correcting roller work together to synchronously adjust the strip tension distribution during correction, effectively avoiding strip breakage caused by local stress concentration; the anti-break frame and the correcting frame are linked to simplify the equipment layout and reduce the complexity of maintenance; based on the strip position and the displacement of the correcting roller, the control console can identify the deviation caused by mechanical gap or hydraulic drift and generate more accurate control signals; reduce malfunctions caused by deformation of the equipment itself and improve the stability of the system in long-term operation; the angle-adjustable mechanism allows the direction of the correcting force to be optimized according to the characteristics of the strip, significantly improving the correction effect on high-strength thin strips or special-shaped strips; a single device can cover production lines of multiple specifications, reducing equipment modification costs; mechanical locking provides high-rigidity support, eliminating the creep risk of hydraulic or pneumatic locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the structure of the correction device of one embodiment of the present invention; Figure 2 Is a front view of the structure of another embodiment of the present invention, the correction device; Figure 3 Is a plan view of the structure of another embodiment of the present invention, the correction device; Figure 4 4 is a flow chart of a correction method according to an embodiment of the present invention.

[0013] In the picture: 100. Fixed rack 200. Correction frame 300, Correction Roller 400, Strip Position Sensor 500, Hydraulic Cylinder 600, anti-break frame 700, Anti-breaking Roller 800, displacement sensor DETAILED DESCRIPTION

[0014] The present disclosure is described more fully below with reference to the accompanying drawings, which illustrate exemplary embodiments of the present disclosure. The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0015] like Figure 1 As shown, the present invention provides an air cushion furnace strip correction device based on tension compensation, which is used to correct the strip, including: Fixed rack 100; The bottom of the fixed frame is provided with a foundation bolt mounting hole for fixing the fixed frame to the ground at the outlet of the air cushion furnace. Preferably, the fixed frame is also provided with a guide rail groove for cooperating with the correction frame so that the correction frame moves in the guide rail.

[0016] The correction frame 200 is provided on the fixed frame 100; The correction frame is slidably arranged on the guide rail groove of the fixed frame through a linear slider, and load-bearing wheels are installed on both sides of the frame to reduce its own pressure and prevent deformation.

[0017] The correction roller 300 is provided on the correction frame 200; Both ends of the correction roller are installed on the correction frame through self-aligning bearings, and the roller surface is perpendicular to the running direction of the strip; The strip position sensor 400 is provided at one end of the strip output, and is used to detect the position of the strip and send a first detection signal; The strip position sensor is mounted on a square steel structure below the output end of the anti-breaking roller and is used to detect the strip edge position in the output direction and send a first detection signal. Preferably, the strip position sensor uses a laser array detector.

[0018] A control console, configured to generate a first control signal according to the first detection signal; The console has a built-in PID control module and a tension compensation algorithm for generating a first control signal according to the first detection signal.

[0019] The hydraulic cylinder 500 has one end disposed on the fixed frame 100 and the other end disposed on the deviation correcting frame 200 , and drives the deviation correcting frame 200 according to the first control signal.

[0020] The cylinder body of the hydraulic cylinder is fixed on the fixed frame through an articulated support, and the piston rod is connected to the side wall of the correction frame through a ball joint. The correction frame is driven to move laterally along the guide rail groove according to the first control signal.

[0021] The above-mentioned device forms a closed-loop control system through real-time feedback from the strip position sensor and the control console, which significantly improves the correction response speed; the hydraulic cylinder directly drives the correction frame, providing high thrust and smooth displacement, avoiding mechanical transmission lag; the rigid connection between the fixed frame and the correction frame ensures that the vibration resistance of the entire device is enhanced during the correction process.

[0022] In order to solve the problem that the strip is easily broken due to sudden tension changes during the correction process (especially thin strips), an independent mechanism is required to disperse the stress, and an implementation method is provided in this embodiment.

[0023] like Figure 2-Figure 3 As shown, in one embodiment, it also includes: The anti-breaking frame 600 is connected to the deviation-correcting frame 200; The anti-belt breakage frame is connected to the deviation-correcting frame, and in order to increase the stability of the anti-belt breakage frame, it can also be connected to the fixed frame through two sets of hinged connecting rods.

[0024] The anti-breaking belt roller 700 is disposed on the anti-breaking belt frame 600 .

[0025] The anti-breaking roller is covered with a 3-5mm polyurethane wear-resistant layer. It is installed on the anti-breaking frame and arranged parallel to the correcting roller. It receives the strip processed by the correcting roller. The axis of the anti-breaking roller forms an adjustable angle with the axis of the correcting roller, so that the roller pressure depth on the tensioned side of the strip is smaller than the roller pressure depth on the relaxed side.

[0026] With the above device, the anti-break roller and the deviation-correcting roller work together to synchronously adjust the strip tension distribution during deviation correction, effectively avoiding strip breakage caused by local stress concentration; the anti-break frame and the deviation-correcting frame are linked to simplify the equipment layout and reduce maintenance complexity.

[0027] In order to solve the problem that a single position sensor cannot distinguish between the error of strip deviation and the mechanical displacement of the correction roller, double detection is required to improve the control accuracy. An implementation method is provided in this embodiment.

[0028] like Figure 2-Figure 3 As shown, in one embodiment, it also includes: a displacement sensor 800, which is used to detect the displacement of the correcting roller 300 and send a second detection signal. The console generates a second control signal based on the first detection signal and the second detection signal. The hydraulic cylinder 500 drives the correcting frame 200 according to the second control signal.

[0029] The displacement sensor uses a magnetic scale with the fixed end installed on the fixed frame and the detection end connected to the correction frame. It is used to detect the displacement of the correction roller and send a second detection signal; the control console performs Kalman filtering on the first detection signal, and weightedly fuses it with the second detection signal to generate a second control signal. The hydraulic cylinder drives the correction frame at a speed of 0.1-5mm / s according to the second control signal (the speed can be changed according to the control to achieve integral correction or proportional correction).

[0030] By using the above device, combined with the strip position and the displacement of the correction roller, the control console can identify deviations caused by mechanical gaps or hydraulic drift, generating more accurate control signals; reducing false operations caused by deformation of the equipment itself, and improving the stability of the system in long-term operation.

[0031] In order to solve the problem that strips of different materials or widths need to match specific correction angles and the fixed frame cannot adapt to the flexibility requirements of the production line, an implementation method is provided in this embodiment.

[0032] In one embodiment, the deviation-correcting frame and the anti-belt-breakage frame are connected via an angle adjustment mechanism, and the angle adjustment mechanism is used to adjust the axial angle between the deviation-correcting frame and the anti-belt-breakage frame.

[0033] By using the above device, the angle-adjustable mechanism allows the direction of the correcting force to be optimized according to the characteristics of the strip, significantly improving the correcting effect on high-strength thin strips or special-shaped strips; a single device can cover production lines of multiple specifications, reducing equipment modification costs.

[0034] In order to solve the problem of angle rebound caused by vibration of the angle adjustment mechanism, an implementation method is provided in this embodiment.

[0035] In one embodiment, the angle adjustment mechanism is locked by a locking bolt.

[0036] With the above device, the locking bolt can be quickly fixed and released, significantly shortening the production line changeover time; mechanical locking provides high-rigidity support and eliminates the creep risk of hydraulic or pneumatic locking.

[0037] like Figure 4 As shown, in order to facilitate the use of the air cushion furnace strip correction device based on tension compensation provided by the present disclosure, the present disclosure also provides an air cushion furnace strip correction method based on tension compensation, comprising the following steps: S100, adjusting the angle adjustment mechanism so that the axial angle between the deviation correction frame and the anti-breaking frame reaches a set angle; S200: The strip is received by the deviation-correcting roller and outputted to the anti-breaking roller. The strip position sensor detects the position of the strip at the output end of the anti-breaking roller. S300: When the strip position sensor detects that the strip has deviated, a first detection signal is generated and sent to the control console; S400: The console generates a first control signal according to the first detection signal and sends the first control signal to the hydraulic cylinder; S500: The hydraulic cylinder drives the deviation-correcting frame according to the first control signal, thereby driving the deviation-correcting roller and the anti-break roller to move and return the strip to the right position.

[0038] The above method is used to implement closed-loop control from detection to execution, eliminating human intervention errors; combined with the angle adjustment function, the direction of the correcting force is accurately matched with the strip deviation trend, improving the return efficiency.

[0039] In order to solve the problem that single correction is prone to overshoot or oscillation under complex working conditions (such as sudden change in tension), and displacement feedback is required to achieve gradual adjustment, an implementation method is provided in this embodiment.

[0040] In one embodiment, the following steps are further included: When the displacement sensor detects that the deviation correction roller has moved, it generates a second detection signal and sends it to the control console; The console generates a second control signal based on the combination of the first detection signal and the second detection signal, and sends the second control signal to the hydraulic cylinder; The hydraulic cylinder drives the deviation-correcting frame according to the second control signal, thereby driving the deviation-correcting roller and the anti-breaking roller to move and return the strip to the right position.

[0041] By adopting the above method, the strip position and roller displacement data are integrated to build a more complete control model, which significantly reduces the oscillation phenomenon during the correction process; it has the ability to dynamically suppress transient external disturbances (such as mechanical vibration) to ensure the stability of continuous production.

[0042] The following describes the contents involved in the above embodiment in conjunction with a preferred embodiment.

[0043] The operator inputs the strip thickness t = 0.8mm into the control console, which automatically calculates the anti-break angle θ = arctan (0.2 × 0.8) ≈ 9° and drives the servo motor to adjust the anti-break frame to this angle. The hydraulic locking nut locks the sector gear. The strip is guided by the correction roller at a speed of 60m / min and enters the anti-break roller (polyurethane lamination depth 3.5mm). The laser sensor monitors the strip position at a frequency of 50Hz. When it detects that the strip deviates to the right by 3.2mm (> bandwidth 1500mm × 3% = 4.5mm), the control console calculates the hydraulic cylinder drive speed v = 2mm / (s·%) × 3.2% =6.4mm / s, the hydraulic cylinder pushes the correction frame to the left; at the same time, the anti-break roller dynamically adjusts the roller pressure depth (reduced to 2mm on the taut side and increased to 5mm on the slack side), reducing the tension difference in the width direction of the strip from 1.8 times to 1.2 times; the displacement sensor provides real-time feedback on the displacement. If it is >8mm for 2 seconds, a tension model F=K×(d1-d2) / L is constructed. When F_max / F_avg<1.5, the current speed is maintained; after the strip returns to the center line within ±0.5mm, the hydraulic cylinder switches to low-speed fine-tuning of 1mm / s, and the pressure depth of the anti-break roller returns to the baseline value of 3.5mm. The system records the data and updates the PID parameters.

[0044] Based on the embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0045] An electronic device includes at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the air cushion furnace strip correction method based on tension compensation provided by the present disclosure.

[0046] Electronic device is intended to refer to various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic device may also refer to various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are intended to be examples only and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0047] A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to execute the air cushion furnace strip correction method based on tension compensation provided by the present disclosure.

[0048] Various embodiments of the present disclosure may be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system comprising at least one programmable processor, which may be a special-purpose or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0049] A computer program product includes a computer program / instruction. When the computer program / instruction is executed by a processor, the air cushion furnace strip correction method based on tension compensation provided by the present disclosure is implemented.

[0050] The program code for implementing the method of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0051] In the context of the present disclosure, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in conjunction with an instruction execution system, device or equipment. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0052] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. The strip deviation correction device of the air cushion furnace based on tension compensation is used to correct the strip, which is characterized by: include: Fixed rack; A correction frame is provided on the fixed frame; A correction roller is provided on the correction frame; a strip position sensor, disposed at one end of the strip output, for detecting the position of the strip and sending a first detection signal; a console, configured to generate a first control signal according to the first detection signal; A hydraulic cylinder, one end of which is arranged on the fixed frame, and the other end of which is arranged on the correction frame, drives the correction frame according to the first control signal.

2. The strip deviation correcting device based on tension compensation in an air cushion furnace according to claim 1, characterized in that: Also includes: An anti-belt breakage frame connected to the deviation-correcting frame; The anti-belt break roller is arranged on the anti-belt break frame.

3. The strip deviation correcting device based on tension compensation in an air cushion furnace according to claim 2, characterized in that: Also includes: The displacement sensor is used to detect the displacement of the correcting roller and send a second detection signal. The console generates a second control signal based on the first detection signal and the second detection signal. The hydraulic cylinder drives the correcting frame according to the second control signal.

4. The strip deviation correcting device for an air cushion furnace based on tension compensation according to any one of claims 1 to 3, characterized in that: The deflection-correcting frame and the anti-belt-breakage frame are connected via an angle adjustment mechanism, and the angle adjustment mechanism is used to adjust the axial angle between the deflection-correcting frame and the anti-belt-breakage frame.

5. The strip deviation correcting device based on tension compensation in an air cushion furnace according to claim 4, characterized in that: The angle adjustment mechanism is locked by a locking bolt.

6. A method for correcting strip deviation in an air cushion furnace based on tension compensation, using the air cushion furnace strip correction device based on tension compensation according to claim 4, characterized in that: The following steps are involved: Adjust the angle adjustment mechanism so that the axial angle between the deviation correction frame and the anti-breaking frame reaches a set angle; The deviation-correcting roller receives the strip and outputs it to the anti-breaking roller, and the strip position sensor detects the position of the strip at the output end of the anti-breaking roller; When the strip position sensor detects that the strip is deviated, the first detection signal is generated and sent to the console; The console generates the first control signal according to the first detection signal and sends the first control signal to the hydraulic cylinder; The hydraulic cylinder drives the deviation-correcting frame according to the first control signal, thereby driving the deviation-correcting roller and the anti-breaking roller to move so as to return the strip to the correct position.

7. The strip deviation correction method for an air cushion furnace based on tension compensation according to claim 6, characterized in that: The following steps are also included: When the displacement sensor detects that the deviation-correcting roller has shifted, it generates a second detection signal and sends it to the console; The console generates the second control signal based on the combination of the first detection signal and the second detection signal, and sends the second control signal to the hydraulic cylinder; The hydraulic cylinder drives the deviation-correcting frame according to the second control signal, thereby driving the deviation-correcting roller and the anti-breaking roller to move so as to return the strip to the correct position.

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