Air cushion furnace strip rectifying device based on tension compensation

Abstract

This invention provides a strip alignment device for an air cushion furnace based on tension compensation, used for strip alignment. It includes a fixed frame; an alignment frame mounted on the fixed frame; an alignment roller mounted on the alignment frame; a strip position sensor located at one end of the strip output for detecting the strip position and sending a first detection signal; a control console for generating a first control signal based on the first detection signal; and a hydraulic cylinder, one end of which is mounted on the fixed frame and the other end on the alignment frame, driving the alignment frame according to the first control signal. The beneficial effects of this invention are that the anti-breakage roller and the alignment roller work together to synchronously adjust the strip tension distribution during alignment, effectively avoiding strip breakage caused by localized stress concentration; and by combining the strip position with the alignment roller displacement, the control console can identify deviations caused by mechanical clearance or hydraulic drift, generating more precise control signals.

Description

Technical Field

[0001] This utility model belongs to the field of metal processing technology, and in particular relates to a strip correction device for an air cushion furnace based on tension compensation. Background Technology

[0002] In continuous heat treatment production lines for aluminum alloy automotive sheets, the heat treatment furnace is an air-cushion suspension furnace. The aluminum alloy strip floats within the 110-meter-long furnace without support rollers, relying on a fan at the bottom of the furnace to create an air cushion. This makes the strip prone to deviation. A correction device must be installed at the furnace outlet. However, existing correction devices are easily broken due to the high temperature of the strip inside the furnace, especially for thin materials. During correction, if the correction rollers are biased to one side, the tension only acts on one edge of the strip. In this case, the strip is very easy to break. Once a strip breaks inside the furnace, the furnace must be stopped until the temperature drops, and then the broken strip must be manually reconnected. This not only scraps the broken strip but also interrupts production, causing significant losses to the factory. Therefore, a strip correction device for air-cushion furnaces that solves these problems is urgently needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a strip correction device for air cushion furnace based on tension compensation, which is particularly suitable for correcting the strip produced by air cushion furnace in continuous heat treatment production line of aluminum alloy automotive sheet while also having the function of preventing strip breakage.

[0004] The technical solution adopted by this utility model is: to provide a strip correction device based on tension compensation for air cushion furnace, used for correcting the strip deviation, including: Fixed frame; The correction frame is mounted on the fixed frame; The correction roller is mounted on the correction frame; A strip position sensor is disposed at one end of the strip output, used to detect the position of the strip and send a first detection signal; A control console is used to generate a first control signal based on the first detection signal; A hydraulic cylinder, one end of which is mounted on the fixed frame and the other end of which is mounted on the correction frame, drives the correction frame according to the first control signal.

[0005] Furthermore, it also includes: An anti-breakage frame is connected to the correction frame; An anti-breakage roller is mounted on the anti-breakage frame.

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

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

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

[0009] The advantages and positive effects of this utility model are as follows: Due to the adoption of the above technical solution, the anti-breakage roller and the correction roller work together to synchronously adjust the tension distribution of the strip during correction, effectively avoiding strip breakage caused by localized stress concentration; the anti-breakage frame and the correction frame are linked, simplifying equipment layout and reducing maintenance complexity; combined with the strip position and the displacement of the correction roller, the control console can identify deviations caused by mechanical clearance or hydraulic drift, generating more precise control signals; it reduces malfunctions caused by equipment deformation, improving the stability of the system during long-term operation; the angle-adjustable mechanism allows for optimization of the correction force direction according to the strip characteristics, significantly improving the correction effect on high-strength thin strips or irregularly shaped strips; a single device can cover multiple production lines, reducing equipment modification costs; mechanical locking provides high-rigidity support, eliminating the creep risk associated with hydraulic or pneumatic locking. Attached Figure Description

[0010] Figure 1 This is a front view of the structure of a correction device according to an embodiment of the present invention; Figure 2 This is a front view of the structure of the correction device according to another embodiment of the present invention; Figure 3 This is a top view of the structure of the correction device according to another embodiment of the present invention.

[0011] In the picture: 400. Strip position sensor 500, Hydraulic Cylinder 600, Anti-breakage frame 700, Anti-breakage belt roller 800, Displacement Sensor Detailed Implementation

[0012] The present disclosure will now be described more fully with reference to the accompanying drawings, which illustrate exemplary embodiments of the present disclosure. The technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative effort are within the scope of protection of the present disclosure.

[0013] like Figure 1 As shown, this utility model provides a strip correction device for an air cushion furnace based on tension compensation, used for correcting the strip's deviation, including: Fixed frame 100; The fixed frame has anchor bolt mounting holes at its bottom for securing it to the ground at the outlet of the gas cushion furnace. Preferably, the fixed frame also has guide rail grooves for cooperating with the alignment frame, allowing the alignment frame to move within the guide rails.

[0014] The correction frame 200 is mounted on the fixed frame 100; The alignment frame is slidably mounted on the guide rail groove of the fixed frame via a linear slider, and load-bearing wheels are installed on both sides of the frame to reduce its own pressure and prevent deformation.

[0015] The correction roller 300 is mounted on the correction frame 200; The straightening roller is mounted on the straightening frame at both ends via self-aligning bearings, and the roller surface is perpendicular to the running direction of the strip. A strip position sensor 400 is located 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-breakage roller. It is used to detect the edge position of the strip in the output direction and send a first detection signal. Preferably, the strip position sensor is a laser array detector.

[0016] A control console is used to generate a first control signal based on a first detection signal; The console has a built-in PID control module and tension compensation algorithm, which are used to generate a first control signal based on the first detection signal.

[0017] Hydraulic cylinder 500, one end of which is mounted on fixed frame 100, and the other end of which is mounted on correction frame 200, drives correction frame 200 according to first control signal.

[0018] The cylinder body of the hydraulic cylinder is fixed to the fixed frame by a hinged support, and the piston rod is connected to the side wall of the correction frame by a ball joint. According to the first control signal, the correction frame is driven to move laterally along the guide rail groove.

[0019] Using the above-mentioned device, a closed-loop control system is formed 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 stable displacement, avoiding mechanical transmission lag; the rigid connection between the fixed frame and the correction frame ensures that the overall device has enhanced vibration resistance during the correction process.

[0020] To address the issue of strip breakage due to sudden tension changes during the correction process (especially for thinner strips), an independent mechanism is needed to distribute stress. This embodiment provides a solution.

[0021] like Figures 2-3 As shown, in one embodiment, it further includes: The anti-breakage frame 600 is connected to the correction frame 200; The anti-breakage belt frame is connected to the correction frame. To increase the stability of the anti-breakage belt frame, it can also be connected to the fixed frame through two sets of hinged connecting rods.

[0022] The anti-breakage roller 700 is mounted on the anti-breakage frame 600.

[0023] The anti-breakage roller is covered with a 3-5mm polyurethane wear-resistant layer. It is set on the anti-breakage frame and arranged parallel to the straightening roller. It receives the strip after it has been processed by the straightening roller. The axis of the anti-breakage roller and the axis of the straightening roller form an adjustable angle, so that the roller pressing depth on the tension side of the strip is less than the roller pressing depth on the relaxation side.

[0024] Using the above-mentioned device, the anti-breakage roller and the correction roller work together to adjust the tension distribution of the strip synchronously during correction, effectively avoiding strip breakage caused by local stress concentration; the anti-breakage frame and the correction frame are linked, simplifying the equipment layout and reducing maintenance complexity.

[0025] To address the issue that a single position sensor cannot distinguish between the error of strip offset and the mechanical displacement of the correction roller, dual detection is required to improve control accuracy. This embodiment provides an implementation method.

[0026] like Figures 2-3 As shown, in one embodiment, it further includes: a displacement sensor 800 for detecting the displacement of the correction roller 300 and sending a second detection signal; a control console for generating a second control signal based on the combination of the first and second detection signals; and a hydraulic cylinder 500 for driving the correction frame 200 according to the second control signal.

[0027] The displacement sensor uses a magnetic grating ruler with its fixed end mounted on a fixed frame and its 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 weighted fusion with the second detection signal to generate a second control signal. The hydraulic cylinder drives the correction frame at a speed of 0.1-5 mm / s according to the second control signal (the speed can be varied according to the control to achieve integral correction or proportional correction).

[0028] By using the above-mentioned device, combined with the strip position and the displacement of the straightening roller, the control console can identify deviations caused by mechanical clearance or hydraulic drift and generate more accurate control signals; reduce malfunctions caused by equipment deformation and improve the stability of the system in long-term operation.

[0029] To address the issue that fixed frames cannot meet the flexibility requirements of production lines when matching specific correction angles for strips of different materials or widths, this embodiment provides an implementation method.

[0030] In one embodiment, the correction frame and the anti-breakage frame are connected by an angle adjustment mechanism, which is used to adjust the axial angle between the correction frame and the anti-breakage frame.

[0031] Using the above-mentioned device, the angle-adjustable mechanism allows for optimization of the direction of the correction force according to the characteristics of the strip, significantly improving the correction effect on high-strength thin strips or irregularly shaped strips; a single device can cover multiple production lines, reducing equipment modification costs.

[0032] To address the issue of angle rebound caused by vibration in the angle adjustment mechanism, this embodiment provides an implementation method.

[0033] In one embodiment, the angle adjustment mechanism is locked by a locking bolt.

[0034] Using the above-mentioned device, the locking bolts can be quickly fixed and released, which greatly shortens the changeover time on the production line; mechanical locking provides high rigidity support and eliminates the creep risk of hydraulic or pneumatic locking.

[0035] The following description, in conjunction with a preferred embodiment, illustrates the content involved in the above embodiments.

[0036] The operator inputs the strip thickness t=0.8mm into the control console. The control console automatically calculates the anti-breakage angle θ=arctan(0.2×0.8)≈9° and drives the servo motor to adjust the anti-breakage 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 into the anti-breakage roller (polyurethane lamination depth 3.5mm). The laser sensor monitors the strip position at a frequency of 50Hz. When the strip is detected to deviate to the right by 3.2mm (>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 move to the left; at the same time, the anti-breakage roller dynamically adjusts the roller pressing depth (reduced to 2mm on the taut side and increased to 5mm on the slack side), so that the tension difference in the width direction of the strip is reduced from 1.8 times to 1.2 times; the displacement sensor provides real-time feedback on the displacement. If it is greater than 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 ±0.5mm, the hydraulic cylinder switches to a low speed of 1mm / s for fine adjustment, the anti-breakage roller pressing depth is restored to the reference value of 3.5mm, the system records the data and updates the PID parameters.

[0037] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A tension-compensated air cushion furnace strip rectifying device for rectifying a strip, characterized in that, include: Fixed frame; The correction frame is mounted on the fixed frame; The correction roller is mounted on the correction frame; A strip position sensor is disposed at one end of the strip output, used to detect the position of the strip and send a first detection signal; A control console is used to generate a first control signal based on the first detection signal; A hydraulic cylinder, one end of which is mounted on the fixed frame and the other end of which is mounted on the correction frame, drives the correction frame according to the first control signal.

2. The tension-compensated air bearing strip straightening device of claim 1, wherein, Also includes: An anti-breakage frame is connected to the correction frame; An anti-breakage roller is mounted on the anti-breakage frame.

3. The tension-compensated air bearing strip straightening device of claim 2, wherein, Also includes: A displacement sensor is used to detect the displacement of the correction roller and send a second detection signal. The control console generates a second control signal based on the combination of the first detection signal and the second detection signal. The hydraulic cylinder drives the correction frame according to the second control signal.

4. The tension-compensated air cushion furnace strip correction device according to claim 2 or 3, characterized in that: The correction frame and the anti-breakage belt frame are connected by an angle adjustment mechanism, which is used to adjust the axial angle between the correction frame and the anti-breakage belt frame.

5. The tension-compensated air cushion furnace strip correction device according to claim 4, characterized in that: The angle adjustment mechanism is locked by a locking bolt.

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