Apparatus for controlling shape of a strip in a stretch-bending straightening process and method of controlling the same

Abstract

The present application relates to a kind of control device of drawing bending straightening incoming material shape, including inlet tension roller group, outlet tension roller group and the straightening unit between inlet tension roller group and outlet tension roller group, multiple first group laser measuring instruments for measuring the surface condition of aluminum strip are provided at the in end of inlet tension roller group, multiple second group laser measuring instruments for measuring the surface condition of aluminum strip are provided at the out end of outlet tension roller group, first shape roller is provided between the straightening unit and inlet tension roller group, second shape roller is provided between the straightening unit and outlet tension roller group, each roller on the inlet tension roller group and outlet tension roller group is respectively driven to rotate by transmission motor, to control the rotating speed of each roller, the control device of drawing bending straightening incoming material shape and its control method design reasonable, it is favorable to realize the control adjustment to the unstable, fluctuation big shape of inner circle of cold-rolled coil, reach the effective control to strip shape (usually refers to plate surface wave) and plate bending.

Description

Technical fields:

[0002] This invention relates to equipment used in the straightening (or tension straightening) process of aluminum alloy strip, specifically to a control device and method for controlling the shape of incoming sheet material during tension bending and straightening, particularly for cold-rolled coils with a tail section of 200-1000 meters. Background technology:

[0004] High-magnesium alloy strips are characterized by smooth surfaces, high tensile strength, and high yield strength. Downstream products have high requirements for the shape and surface quality of such strips. The speed-up section of the cold rolling mill is basically around 800 meters. During the speed-up process, the speed and tension are unstable, and the heat of plastic deformation and friction of the metal are generated and begin to accumulate. The thermal expansion of the rolls is relatively small, while the thermal crown is constantly changing. In addition, the control of the starting bending rolls, the shape adjustment, and the thickness difference between the head and tail of the billet also affect the entire rolling system and lubrication, which prevents the entire rolling system and lubrication from forming a relatively stable state.

[0005] After the cold rolling mill processing, the finished coil (the strip processed by the cold rolling mill is wound around the steel sleeve and can be called cold rolled coil) is subject to internal stress. The coil close to the steel sleeve is easily affected by the deformation of the steel sleeve (due to the friction of the winding belt and the influence of external forces during storage and use, the steel sleeve often exhibits problems such as concavity and eccentricity). The strip near the inner ring of the steel sleeve often shows problems such as deformation, wavy, and twisting. This results in the inner ring of a coil having a worse and unstable shape than the middle and outer ring of the coil. Therefore, when the cold rolled coil needs to be straightened, the part of the coil near the inner ring (300-800 meters in length) cannot be used and needs to be scrapped. Otherwise, the outer ring of the straightened coil output after the straightening process will not meet the requirements.

[0006] In the traditional strip straightening production process, after the strip enters the tension leveler and the outer ring is tested (the outer ring refers to the outer ring of the cold-rolled coil, which enters the tension leveler first), and the strip shape is confirmed to be qualified, the same elongation rate and strip shape roller parameters at the straightener exit will be used for the entire coil production process. However, using the same parameters for production will not completely improve the strip shape of the inner ring of the cold-rolled coil. Currently, most of these strips with poor strip shape after tension leveling due to factors of the inner ring of the cold-rolled coil will be scrapped or re-stretched and straightened at the finished product slitting stage (i.e., the strip at the final stage of the tension leveling process) (the length of scrapped or re-stretched and straightened strips can reach 300-800 meters), which seriously affects the yield and production efficiency. Summary of the Invention:

[0008] In view of this, the purpose of the present invention is to provide a control device and control method for the shape of incoming sheet material that is straightened by bending. The control device and control method for the shape of incoming sheet material that is straightened by bending are reasonably designed and are conducive to controlling and adjusting the shape of the inner circle of cold rolled coil material that is unstable and fluctuates greatly, so as to achieve effective control of the shape of the strip (usually referring to the wave pattern on the surface) and the bending of the strip.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] This invention relates to a control device for straightening incoming sheet material, characterized in that it comprises an inlet tension roller group, an outlet tension roller group, and a straightening unit located between the inlet and outlet tension roller groups. At the inlet end of the inlet tension roller group, a first set of laser measuring instruments is provided for measuring the surface condition of the aluminum strip. At the outlet end of the outlet tension roller group, a second set of laser measuring instruments is provided for measuring the straightness of the aluminum strip after straightening. A first sheet-forming roller is provided between the straightening unit and the inlet tension roller group, and a second sheet-forming roller is provided between the straightening unit and the outlet tension roller group. Each roller in the group is driven to rotate by a drive motor to control the rotation speed of each roller. The first and second strip rollers are driven to rise and fall by lifting drive mechanisms to control the pressing amount of the first and second strip rollers. The first and second sets of laser measuring instruments serve as detection mechanisms, transmitting the strip bending value information to the controller. The controller controls the adjustment of the elongation rate generated by the speed difference between the inlet tension roller group and the outlet tension roller group to adjust the flatness of the strip. At the same time, it controls the lifting drive mechanisms of the first and second strip rollers to adjust the bending direction of the strip.

[0011] Preferably, both the first and second sets of laser measuring instruments have 12 sets of laser measuring instruments, and the controller also collects data on the travel of the aluminum strip.

[0012] Preferably, the 12 sets of laser measuring instruments are evenly distributed along the width direction of the strip to form a straight line, thereby enabling real-time measurement of the flatness of the strip.

[0013] 1. Preferably, the above-mentioned inlet tension roller group is provided with a first tension roller, a second tension roller, a third tension roller and a fourth tension roller with the same roller diameter from the inlet end to the outlet end. The second tension roller and the third tension roller are located at the same height, the first tension roller and the fourth tension roller are located at the same height, and the height of the second tension roller and the third tension roller is higher than the height of the first tension roller and the fourth tension roller. The aluminum strip passes around the first tension roller, then the second tension roller, then the third tension roller, and finally the fourth tension roller in sequence. The first and second tension rollers form an S-shaped wrap angle, and the third and fourth tension rollers form an S-shaped wrap angle. Similarly, the four tension rollers at the outlet are wound in the same way as the four tension rollers at the inlet.

[0014] Preferably, each roller in the above-mentioned inlet tension roller group and outlet tension roller group is a polyurethane roller, and the diameter of each tension roller is 800-1200mm.

[0015] Preferably, the straightening unit includes five sets of bending straightening units with the same roller diameter, namely, the first straightening roller group, the second straightening roller group, the third straightening roller group, the fourth straightening roller group, and the fifth straightening roller group. The second and fourth straightening roller groups are located at the same height, as are the first, third, and fifth straightening roller groups. The height of the second and fourth straightening roller groups is higher than that of the first, third, and fifth straightening roller groups. After being output from below the first plate-shaped roller, the aluminum strip passes sequentially above the first straightening roller, below the second straightening roller, above the third straightening roller, below the fourth straightening roller, above the fifth straightening roller, and below the second plate-shaped roller, forming an S-shaped wrap angle through the combined operation of each straightening roller group. The working roller diameter in each straightening roller group is 30mm.

[0016] Preferably, the above-mentioned lifting drive mechanism is a worm gear mechanism, which is driven by a control motor. The position of the plate roller is detected by an encoder and fed back to the controller, and closed-loop control is performed with the set position. The control motor drives the lifting mechanism to achieve lifting position adjustment.

[0017] The present invention relates to a method for controlling the shape of incoming aluminum strips during tension straightening. The method is characterized by: after cold rolling in a cold rolling mill, the strip is stored as a coil. When tension straightening is required, the coiled aluminum is input into a control device. The aluminum strip travels on this device, and the controller collects travel data. When the strip has traveled to the final 200-1000 meters, the controller collects data from the first and second sets of laser measuring instruments and compares the data to understand the changes in the surface shape of the aluminum strip. This allows for the control of the rotation speed of each drive motor to change the elongation of the aluminum strip, and the control of the lifting drive mechanism to change the bending of the aluminum strip. The second set of laser measuring instruments measures and verifies whether the bending of the aluminum strip has been adjusted after adjusting the rotation speed of each drive motor and the lifting drive mechanism. The deviation value is fed back to the controller to further optimize the elongation of the aluminum strip and the pressing amount of the first and second shaping rollers, forming a closed-loop control.

[0018] For the tail section of cold-rolled coils (200-1000 meters), the elongation is increased by 0.1%-0.3% compared to the head section, and the reduction of the first and second forming rolls is 23.4-23.6 mm.

[0019] This invention utilizes a first set of laser measuring instruments at the inlet end of the inlet tension roller group to measure the surface condition of aluminum strip, and a second set of laser measuring instruments at the outlet end of the outlet tension roller group to measure the surface condition of aluminum strip. A first plate-shaped roller is positioned between the straightening unit and the inlet tension roller group, and a second plate-shaped roller is positioned between the straightening unit and the outlet tension roller group. Each roller on the inlet and outlet tension roller groups is driven by a transmission motor, allowing control of the rotation speed of each roller. The first and second plate-shaped rollers are driven by a lifting drive mechanism, allowing control of the pressing amount of the first and second plate-shaped rollers. The first set of laser measuring instruments, the second set of laser measuring instruments, each transmission motor, and the lifting drive mechanism are electrically connected to a controller. This enables control and adjustment of the unstable and highly fluctuating shape of the aluminum coil, achieving effective control of the strip shape (usually referring to surface wavy lines) and bending. Attached image description:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 A partial view;

[0023] Figure 3 This is the control principle diagram of the present invention;

[0024] Figure 4 This is a top view of the layout of the laser measuring instrument;

[0025] Figure 5 This is a side view of the layout of the laser measuring instrument;

[0026] Figure 6 It is a waveform diagram of the plate surface measured in real time by a laser measuring instrument;

[0027] Figure 7 It is a fitted plate-shaped waveform diagram. Detailed implementation method:

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] The control device for straightening incoming sheet shape according to the present invention includes an inlet tension roller group 1, an outlet tension roller group 2, and a straightening unit 3 located between the inlet tension roller group and the outlet tension roller group. At the inlet end of the inlet tension roller group 1, there is a first set of laser measuring instruments 4 for measuring the surface condition of aluminum strip K. At the outlet end of the outlet tension roller group 2, there is a second set of laser measuring instruments 5 for measuring the surface condition of aluminum strip. That is, the distance of a certain point on the surface of aluminum strip is measured by the laser measuring instruments to reflect the wave surface (the height of the convexity above the theoretical plane) of the aluminum strip surface.

[0032] Specifically, the first group of laser measuring instruments 4 and the second group of laser measuring instruments 5 each have 12 sets of laser measuring instruments; the above 12 sets of laser measuring instruments are evenly distributed in the width direction of the strip to form a straight line, so as to realize the real-time measurement of the flatness of the plate shape.

[0033] The inlet tension roller group 1 is provided with a first tension roller 102, a second tension roller 101, a third tension roller 104, and a fourth tension roller 103 of the same diameter from the inlet end to the outlet end. The first tension roller and the fourth tension roller are at the same height, and the second tension roller and the third and fourth tension rollers are at the same height. The height of the first tension roller and the fourth tension roller is higher than that of the second tension roller and the third tension roller. The aluminum strip passes around the first tension roller, then the second tension roller, then the third tension roller, and finally the fourth tension roller. The first and second tension rollers form an S-shaped wrap angle, and the third and fourth tension rollers form an S-shaped wrap angle. Similarly, the four tension rollers at the outlet have the same wrapping method as the four tension rollers at the inlet.

[0034] The aforementioned outlet tension roller group 2 is provided with a fifth tension roller 202, a sixth tension roller 201, a seventh tension roller 204, and an eighth tension roller 203 of the same diameter from the inlet end to the outlet end. The sixth and seventh tension rollers are located at the same height, and the fifth and eighth tension rollers are located at the same height. The height of the fifth and eighth tension rollers is higher than that of the sixth and seventh tension rollers. The aluminum strip passes around the fifth tension roller, then the sixth tension roller, then the seventh tension roller, and finally the eighth tension roller in sequence. The fifth and sixth tension rollers form an S-shaped wrap angle, and the seventh and eighth tension rollers form an S-shaped wrap angle.

[0035] Each roller on the inlet tension roller group 1 and the outlet tension roller group 2 is driven by a drive motor 8 to control the rotation speed of each roller. All rollers in the inlet tension roller group 1 and the outlet tension roller group 2 are polyurethane rollers, with a roller diameter of 800-1200mm, preferably 1000mm. The speed difference between the tension rollers is used to extend the aluminum strip. The linear speeds of the tension rollers used in the four sets of experiments are as follows:

[0036] .

[0037] The straightening unit 3 includes five sets of straightening rollers with the same diameter, namely, the first straightening roller 301, the second straightening roller 302, the third straightening roller 303, the fourth straightening roller 304, and the fifth straightening roller 305. The second and fourth straightening rollers are at the same height, as are the first, third, and fifth straightening rollers. The working height of the second and fourth straightening rollers is lower than that of the first, third, and fifth straightening rollers. After being output from below the first plate-shaped roller, the aluminum strip passes sequentially above the first straightening roller, below the second straightening roller, above the third straightening roller, below the fourth straightening roller, above the fifth straightening roller, and below the second plate-shaped roller. The diameter of each roller is 20-60mm, preferably 30mm.

[0038] The straightening unit 3, consisting of five elements and six groups with an ultra-small roller diameter (30mm), is used to eliminate residual stress during cold rolling of the strip, making the rolled fibers in the width direction of the strip more uniform and eliminating the influence of stress difference in the width direction on the strip shape.

[0039] A first plate-shaped roller 6 is provided between the straightening unit 3 and the inlet tension roller group 1, and a second plate-shaped roller 7 is provided between the straightening unit 3 and the outlet tension roller group 2 (the wrap angle of the aluminum strip on the fifth tension roller is adjusted by adjusting the pressing amount of the second plate-shaped roller 7, thereby controlling the plate bending). The first plate-shaped roller 6 and the second plate-shaped roller 7 are driven to rise and fall by the lifting drive mechanism 9, respectively, to control the pressing amount of the first plate-shaped roller and the second plate-shaped roller. The first set of laser measuring instruments 4, the second set of laser measuring instruments 5, each drive motor 8 and the lifting drive mechanism 9 are electrically connected to the controller 10. The controller also collects data on the travel of the aluminum strip (collecting data on the travel of the aluminum strip is a conventional technology, such as collecting the number of revolutions of a certain roller at the feeding end × the circumference of the roller, which is the travel of the aluminum strip, etc. The device for recording the number of revolutions of the roller can be a motor encoder, etc.).

[0040] The aforementioned lifting drive mechanism is a worm gear mechanism, which is driven by a control motor. The position of the control plate roller is detected and fed back to the controller by an encoder, and closed-loop control is performed with the set position. The control motor drives the lifting mechanism to achieve lifting position adjustment.

[0041] This invention discloses a method for controlling the shape of incoming aluminum strips after cold rolling. After cold rolling, the strip is stored as a coil. When a straightening process is required, the coiled aluminum is input into the control device of this application. The aluminum strip travels on this control device, and the controller collects the travel data of the aluminum strip. When the aluminum strip has traveled to the last 200-1000 meters (i.e., the aluminum in the inner ring of the cold-rolled coil), the controller collects data from the first and second sets of laser measuring instruments and compares the measurement data to understand the changes in the surface shape of the aluminum strip. The rotation speed of each drive motor is then controlled to change the elongation of the aluminum strip, and the lifting drive mechanism is controlled to change the bending of the aluminum strip. The second set of laser measuring instruments measures and verifies whether the bending of the aluminum strip has been adjusted after adjusting the rotation speed of each drive motor and the lifting drive mechanism. The deviation value is fed back to the controller to further optimize the elongation of the aluminum strip and the pressing amount of the first and second shaping rollers, forming a closed-loop control.

[0042] To address the issue of substandard performance in the last 200-1000 meters of cold-rolled coils, this application proposes increasing the elongation by 0.1% and pressing the first and second shaping rollers down by 0.3mm to achieve the desired sheet shape. Otherwise, issues such as edge wavy lines and upward bending may occur. The following test results illustrate this:

[0043]

[0044] The above test results show that: for the head section (0-15,000 meters) of cold-rolled coil, the elongation rate is set at 0.45%, the roll reduction is 23.1 mm, and the overall sheet shape is qualified.

[0045] If the elongation of the tail section (200-1000 meters) of cold-rolled coil is set at only 0.45% and the reduction of the forming roller is not adjusted, the overall sheet shape will have edge wavy patterns. If the elongation of the tail section (200-1000 meters) of cold-rolled coil is increased by 0.1% to 0.55% from 0.45% and the reduction of the forming roller is not adjusted, the overall sheet shape will have no edge wavy patterns and the middle wavy pattern will be acceptable, but there will be upward bending of the sheet. However, if the elongation of the tail section (200-1000 meters) of cold-rolled coil is increased by 0.1% to 0.55% from 0.45% and the reduction of the forming roller is adjusted from 23.1mm down by 0.3-0.5mm to 23.4-23.6mm, the overall sheet shape will be acceptable.

[0046] Therefore, for the tail section (200-1000 meters) of cold-rolled coil, when the elongation to be controlled increases from 0.45% to 0.55% by 0.1%, and the first and second forming rolls press down by 0.3mm to 23.4mm from 23.1mm, the overall sheet shape can be guaranteed to be controlled within the acceptable range.

[0047] The zero point of the pressing amount of the above-mentioned plate roll is located at the upper edge of the fifth roller 305 in the straightening unit 3. That is, the pressing amount (23.1mm or 23.4mm) is the height difference between the upper edge of the fifth roller 305 in the straightening unit 3 and the lower edge of the second plate roll 7 (and the first plate roll).

[0048] This invention features a first set of laser measuring instruments at the inlet end of the inlet tension roller group for measuring the surface condition of aluminum strip, and a second set of laser measuring instruments at the outlet end of the outlet tension roller group for measuring the shape and surface condition of aluminum strip. A first shaping roller is positioned between the straightening unit and the inlet tension roller group, and a second shaping roller is positioned between the straightening unit and the outlet tension roller group. Each roller on the inlet and outlet tension roller groups is driven by a transmission motor, allowing control of the rotation speed of each roller. The first and second shaping rollers are driven by a lifting drive mechanism, allowing control of the pressing amount of the first and second shaping rollers. The first and second laser measuring instruments, each transmission motor, and the lifting drive mechanism are electrically connected to a controller. This enables control and adjustment of the shape of the aluminum coil, which is subject to large fluctuations, achieving effective control of the strip shape (usually referring to surface wavy lines) and bending.

[0049] Furthermore, through experiments and data analysis, the elongation rate (adjusting the strip shape) of the tension roller group and the pressing adjustment amount of the strip shape roller (controlling the bending of the strip) that need to be adjusted for different strip shapes and materials can be derived.

[0050] By adding 12 sets of linearly arranged laser plate shape measuring instruments (such as...) to both the inlet and outlet tension roller groups... Figure 4 As shown), it is specifically used to detect the wavy height of the strip tail. By comparing the height difference, the shape of the incoming material is judged, and then the pressing amount of the strip shape roller and the elongation of the tension roller group are adjusted to improve the strip tail shape. The inlet measuring instrument checks the wavy height of the strip. The tension roller group and the first and second strip shape rollers adjust the elongation and pressing amount values ​​according to the input experience values. The outlet measuring instrument (second group of laser measuring instruments 5) measures again to verify whether the strip shape has been improved after adjustment. The deviation value is fed back to the controller to further optimize the elongation and pressing amount of the strip shape roller, forming a closed loop control.

[0051] Through repeated experiments and tracking experimental data, it was concluded that: for an increase of 0.1% in the elongation of the aluminum strip tail, the shape roller needs to be pressed down by 0.3mm more to obtain a more ideal strip shape; for the current 5182G alloy, for the 0.224*1710 specification product, when the elongation increases by 0.1% during straightening, the shape roller needs to be pressed down by 0.3~0.5mm more to meet the processing requirements.

[0052] Twelve sets of high-precision laser rangefinders (the first and second sets of laser measuring instruments) are added at the inlet and outlet respectively, specifically for detecting the wave height of the strip tail. Through online strip shape measurement by the 12 laser strip shape measuring instruments, the laser reflected values ​​will be inconsistent in areas with poor strip shape, such as undulating wave height. Based on the defined mill rolling line, according to the different laser received values ​​reflected back from the strip shape, after processing by the laser strip shape measurement value real-time acquisition device, the current strip shape is finally displayed on the strip shape controller. This fluctuation value will be fed back to the controller (PLC) at all times. The controller (PLC) will fine-tune the elongation rate of the tension roller and the pressing amount of the strip shape roller based on the change value of the strip shape, so as to achieve the flatness of the strip shape and achieve the purpose of strip shape correction.

[0053] Twelve sets of high-precision laser rangefinders (i.e., the second set of laser measuring instruments) are added at the exit, specifically for closed-loop control of plate shape. They detect whether the plate shape has reached the target value after adjustment, and feed back the measured deviation value to the PLC to readjust the elongation rate of the tension roller and the pressing amount of the plate shape roller to achieve further correction of the plate shape.

[0054] Experiments and on-site tracking verification have shown that increasing the elongation rate and simultaneously adjusting the position of the strip roll can improve the strip shape difference at the tail end (referring to the inner ring of the cold-rolled coil), so that the aluminum coil in this part does not need to be scrapped, and each coil can have about 200-1000 meters more finished coil.

[0055] The above-described preferred embodiments further illustrate the purpose, technical solutions, and advantages of the present invention. It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control device for straightening and bending incoming sheet material, characterized in that: The system includes an inlet tension roller group, an outlet tension roller group, and a straightening unit located between the inlet and outlet tension roller groups. At the inlet end of the inlet tension roller group, multiple first-group laser measuring instruments are installed for measuring the surface shape of the aluminum strip. At the outlet end of the outlet tension roller group, multiple second-group laser measuring instruments are installed for measuring the surface condition of the aluminum strip. A first-shaped roller is installed between the straightening unit and the inlet tension roller group, and a second-shaped roller is installed between the straightening unit and the outlet tension roller group. Each roller on the inlet and outlet tension roller groups is driven to rotate by a drive motor to control the rotation speed of each roller. The first and second-shaped rollers are driven to rise and fall by lifting drive mechanisms to control the amount of pressure applied by the first and second-shaped rollers. The first and second laser measuring instruments act as detection mechanisms, transmitting the strip bending value information to a controller. The controller adjusts the elongation rate generated by the speed difference between the inlet and outlet tension roller groups to adjust the flatness of the strip. Simultaneously, it controls the lifting drive mechanisms of the first and second-shaped rollers to adjust the bending direction of the strip.

2. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 1, characterized in that: Both the first and second sets of laser measuring instruments have 12 sets of laser measuring instruments, and the controller also collects data on the travel of the aluminum strip.

3. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 2, characterized in that: The 12 sets of laser measuring instruments are evenly distributed along the width of the strip, forming a straight line to achieve real-time measurement of the flatness of the strip.

4. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 3, characterized in that: The inlet tension roller group consists of a first tension roller, a second tension roller, a third tension roller, and a fourth tension roller with the same diameter, arranged sequentially from the inlet end to the outlet end. The second and third tension rollers are at the same height, as are the first and fourth tension rollers, and the height of the second and third tension rollers is higher than that of the first and fourth tension rollers. The aluminum strip passes through the first tension roller, the second tension roller, the third tension roller, and finally the fourth tension roller in sequence. The first and second tension rollers form an S-shaped wrap angle, as do the third and fourth tension rollers. Similarly, the outlet tension roller group has the same winding method for the four tension rollers as the inlet tension roller group.

5. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 4, characterized in that: Each roller in the inlet tension roller group and the outlet tension roller group is a polyurethane roller, and the diameter of each tension roller is 800-1200mm.

6. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 5, characterized in that: The straightening unit includes five rollers of the same diameter, namely, the first roller, the second roller, the third roller, the fourth roller, and the fifth roller. The second roller and the fourth roller are at the same height, and the first roller, the third roller, and the fifth roller are at the same height, with the second roller and the fourth roller being higher than the first roller, the third roller, and the fifth roller. The aluminum strip is output from below the first plate roller and passes sequentially above the first roller, below the second roller, above the third roller, below the fourth roller, above the fifth roller, and below the second plate roller. The diameter of each roller is 20-60mm.

7. The control device for controlling the shape of incoming sheet metal by bending and straightening according to claim 6, characterized in that: The lifting drive mechanism is a worm gear mechanism, which is driven by a control motor. The position of the plate roller is detected by an encoder and fed back to the controller, which performs closed-loop control with the set position. The control motor drives the lifting mechanism to achieve lifting position adjustment.

8. A method for controlling the shape of incoming sheet material as described in any one of claims 1-7, characterized in that: After cold rolling, the aluminum strip is formed into coils and stored. When a straightening process is required, the coiled aluminum strip is fed into the control device. The aluminum strip travels on the control device, and the controller collects the travel data of the aluminum strip. When the aluminum strip has traveled to the last 200-1000 meters, the controller collects data from the first and second sets of laser measuring instruments and compares the measurement data of the first and second sets of laser measuring instruments to understand the change in the flatness of the aluminum strip surface. Then, the rotation speed of each drive motor is controlled to change the elongation of the aluminum strip, and the lifting drive mechanism is controlled to change the bending of the aluminum strip. The second set of laser measuring instruments measures and verifies whether the flatness and bending of the aluminum strip have been adjusted after the adjustment of the rotation speed of each drive motor and the lifting drive mechanism. The deviation value is fed back to the controller to further optimize the elongation of the aluminum strip and the pressing amount of the first and second forming rollers, forming a closed-loop control.

9. The method for controlling the shape of incoming sheet material by bending and straightening according to claim 8, characterized in that: For the tail section of 200-1000 meters of cold-rolled coil with an elongation of 0.2%-0.4%, the reduction of the first and second forming rolls is 23.4-23.6 mm.

Images