A two-roll gusseted sheet rolling machine and a gusseted sheet processing method

Abstract

The application provides a two-roller ribbed plate rolling mill and a ribbed plate processing method, and relates to the field of ribbed plate rolling. The rolling mill comprises a rack, an upper roller and a lower roller rotatably installed on the rack, an adjusting mechanism for adjusting the distance between the upper roller and the lower roller is arranged on the rack, and an annular groove is arranged on the arc outer peripheral wall of the lower roller. The annular groove is several and is matched with the rib on the ribbed plate to be processed. Two annular baffles are arranged at the two ends of the annular groove, the distance between the two annular baffles is matched with the width of the ribbed plate to be processed, and the upper roller and the lower roller meet formula one when they rotate together. With the arrangement of the annular groove and the annular baffle, the ribbed plate can be integrally rolled, the rotation speed ratio of the upper roller and the lower roller can be controlled, and the arc ribbed plate can be continuously processed with high quality.

Description

Technical Field

[0001] This application relates to the field of ribbed plate rolling technology, and in particular to a two-roll ribbed plate rolling mill and a ribbed plate processing method. Background Technology

[0002] Currently, with the rapid development of high-end equipment, the quality requirements of its key components are constantly increasing. From the perspective of structural design, traditional skin components are gradually being replaced by integral stiffened panels, and the segmented panel plus roll forming and welding structure is gradually transforming into an integrated structure. Its molding and manufacturing process is mainly divided into traditional manufacturing technology, integral loading near-net-shape plastic forming technology, and partial loading near-net-shape plastic forming technology.

[0003] Traditional manufacturing techniques can produce irregular cross-section rib structures, but machining causes the metal flow lines at the rib locations to be cut off. Precision casting components lack plastic deformation strengthening, which easily leads to coarse internal grain structure. In the overall loading process, extrusion-related processes are mainly used to form thick-walled cylindrical parts. This is because the overall loading method limits its ability to be extended to the forming of large-diameter thin-walled cylinders. It still requires a high overall load on the equipment and is difficult to extend to the forming of complex irregular cross-section rib structures.

[0004] Therefore, it is still necessary to develop new processes suitable for forming large-diameter, thin-walled, irregularly shaped ribbed tubes. Roll forming is a new method for forming plate and shell parts with variable thickness characteristics, based on the principle of "local loading and continuous forming" of rotating molds. Unlike traditional processes that are also based on rotating molds, plate roll forming "uses the plate as a blank and the plate and shell part as the target". Ribbed plates can be used as the original processing material for ribbed tube and rib ring components. They can be processed by a faster rolling method to achieve the processing purpose and provide guidance for the forming of ribbed integral wall panels.

[0005] Among them, the roll forming process can effectively avoid the cutting of metal flow lines, improve the mechanical properties of stiffened plates, and has the advantage of continuous feed processing. It solves the problem of large molds when stamping large stiffened plates. By setting the ratio of the upper and lower roll speeds, the relative metal flow between the upper and lower surfaces of the stiffened plate can be adjusted, realizing the process flow from sheet metal to stiffened ring parts and reducing processing steps. However, the existing roll forming process is difficult to control the processing accuracy of stiffened plates, resulting in low quality and uniform finished products, mostly straight stiffened plates. If processing stiffened plates with a certain curvature, the filling rate of the ribs is difficult to control due to factors such as roll speed and metal flow rate, which easily leads to defects in the rib forming quality.

[0006] Therefore, it is necessary to design a continuously fed rolling mill to solve the above-mentioned technical problems. Summary of the Invention

[0007] In order to improve the problem of rib forming quality defects that easily occur when processing ribbed plates with a certain curvature, this application provides a two-roll ribbed plate rolling mill and a ribbed plate processing method.

[0008] The first aspect of this application provides a two-roll type ribbed plate rolling mill with the following technical solution: A two-roll ribbed plate rolling mill includes a frame and an upper roll and a lower roll rotatably mounted on the frame. The frame is provided with an adjustment mechanism for adjusting the distance between the upper roll and the lower roll. The lower roll has the following on its outer peripheral wall: Annular grooves, which are several in number and are adapted to the ribs on the ribbed plate to be processed; Two annular baffles are provided and located at both ends of several annular grooves. The distance between the two annular baffles is adapted to the width of the ribbed plate to be processed. Furthermore, when the upper roller and the lower roller rotate in coordination, they satisfy Formula 1: ; In the formula: V1 — the linear velocity of the upper roller; V2 — the linear velocity of the lower roller; r1—Radius of the finished arc surface of the stiffened plate to be processed; h — Thickness of the stiffened plate to be processed.

[0009] Furthermore, the frame is equipped with a displacement sensor for detecting the travel length of the stiffened plate to be processed, and the cumulative travel length detected by the displacement sensor is set to L. t ; If the feed length of the stiffened slab blank to be processed is greater than L under the set conditions t If the stiffened plate to be processed is slipping, the speed of the lower roller needs to be increased to increase the feed displacement of the billet, reduce the displacement error and thus reduce the radius deviation. If the feed length of the stiffened slab blank to be processed is less than L under the set conditions t If the speed of the ribbed plate to be processed is too high, the speed of the lower roller needs to be reduced to decrease the feed displacement of the billet.

[0010] Furthermore, when increasing or decreasing the speed of the lower roller, the speed of the upper roller is adjusted simultaneously to ensure that both satisfy Formula 1.

[0011] Furthermore, under the given conditions, the feed length of the ribbed slab blank to be processed satisfies Formula 2: ; In the formula: L1—Feed length of the stiffened plate blank to be processed under the set state; S1—Cross-sectional area of ​​the stiffened slab blank to be processed; S2—The cross-sectional area of ​​the stiffened plate after rolling; t — Processing time of the stiffened plate to be processed.

[0012] Furthermore, the adjustment mechanism includes; The slider is rotatably sleeved on the axial end of the upper roller; A guide rail is fixedly connected to the frame, and the slider is prevented from sliding off the guide rail. The length direction of the guide rail is arranged along the arrangement direction of the upper and lower rollers. A drive assembly for driving the slider to slide on the guide rail.

[0013] Furthermore, the driving component includes: The adjusting screw has its bottom end rotatably connected to the slider and its top end penetrating the top of the frame. An adjusting nut is fixed to the top of the frame, and the adjusting screw thread passes through the adjusting nut. A handle is located at the top of the adjusting screw.

[0014] Furthermore, the frame is equipped with a first drive motor for driving the upper roller to rotate and a second drive motor for driving the lower roller to rotate. The first drive motor and the second drive motor are connected to a main controller, and the displacement sensor is connected to the main controller.

[0015] Furthermore, the main controller is configured as follows: If L1 > L t If the speed is controlled, the speed of the second drive motor will be increased to make the two motors equal, and then the speed will be gradually restored to the original operating speed. If L1 < L t If the second drive motor is decelerated, it will be controlled to make the two speeds equal, and then gradually restored to the original operating speed.

[0016] The second aspect of this application provides a method for processing stiffened plates, based on the aforementioned two-roll stiffened plate rolling mill, and adopts the following technical solution: A method for processing stiffened plates includes the following steps: S1. Set the rotation speed of the upper roller and the lower roller according to the finished arc radius and plate thickness of the stiffened plate to be processed, and adjust the gap between the upper roller and the lower roller; S2. The blank with stiffened plate to be processed is fed at a uniform speed between the upper roller and the lower roller for rolling; S3. Real-time monitoring of the cumulative travel length L of the stiffened plate on the discharge side. t And compare it with the feed length of the ribbed slab blank to be processed under the set state; wherein the feed length of the ribbed slab blank to be processed under the set state satisfies Formula 2: ; In the formula: L1—Feed length of the stiffened plate blank to be processed under the set state; S1—Cross-sectional area of ​​the stiffened slab blank to be processed; S2—The cross-sectional area of ​​the stiffened plate after rolling; t — Processing time of the stiffened plate to be processed; S4. During the comparison, if L1 > L t If the speed of the lower roller is increased to make the two rollers similar, the speed will be gradually restored to the operating speed before control. If L1 < L t If the speed of the lower roller is reduced, the speed of the two rollers will be reduced to make them similar, and then the speed will be gradually restored to the operating speed before control.

[0017] In summary, this application includes at least one of the following beneficial technical effects: 1. When processing ribbed plates with an arc shape, the rotation speeds of the upper and lower rollers can be set according to parameters such as the radius of the finished arc surface and the plate thickness to ensure that the ribbed plate can be processed to the target arc shape during the rolling process. Furthermore, by setting an annular groove and an annular baffle on the lower roller, the ribbed plate can be combined with the rolling process. This allows the upper roller to move downwards under the action of the adjustment mechanism, pressing the ribbed plate blank together with the lower roller. The blank undergoes plastic deformation, forming ribs under the action of the annular groove. This prevents the metal flow lines of the ribs from being cut, improves the mechanical properties of the processed ribbed plate, and reduces the number of processing steps. 2. During the rolling process, the metal flow of the billet is divided into radial flow and axial flow. By setting annular baffles on both sides of the annular groove, the axial flow of the billet can be effectively restricted, promoting the formation of ribs and improving the filling rate of the billet. At the same time, it can prevent the billet from shifting or slipping during processing and ensure the centering of the billet. Moreover, the setting of the annular baffles can also promote the flow of metal into the groove and increase the filling rate of the ribs. 3. Under the control of the main controller, the first and second drive motors maintain a speed ratio that enables high-quality machining of the curved ribbed plate; the displacement sensor measures the feed length L of the ribbed plate blank to be machined. t Real-time monitoring is performed, and the central controller then compares L in real time. t The values ​​of L1 and L2 are used to calibrate the driving speed of the second drive motor. The driving speed of the first drive motor is also calibrated according to the ratio in Formula 1. This allows the upper and lower rollers to monitor and automatically correct slippage or overspeed of the ribbed plate during the rolling process, greatly improving production efficiency and ensuring the processing quality of the curved ribbed plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2 This is a longitudinal section diagram of Embodiment 1 of this application; Figure 3 This is a cross-sectional structural diagram of Embodiment 1 of this application; Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0020] Figure label: 1. Rack; 2. Upper roller; 3. Lower roller; 41. Annular groove; 42. Annular baffle; 5. Displacement sensor; 61. Slider; 62. Guide rail; 63. Adjusting screw; 64. Adjusting nut; 65. Handle; 71. First drive motor; 72. Second drive motor; 8. Ribbed plates to be processed. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] Example 1: Reference Figure 1 , Figure 2 and Figure 3 This application discloses a two-roll ribbed plate rolling mill, which includes a frame 1 and an upper roll 2 and a lower roll 3 rotatably mounted on the frame 1. The frame 1 is provided with an adjustment mechanism for adjusting the distance between the upper roll 2 and the lower roll 3. Specifically, the adjustment mechanism is used to adjust the lifting position of the upper roll 2; the lower roll 3 has the following on its outer peripheral wall: Annular grooves 41, which are several and are adapted to the ribs on the ribbed plate 8 to be processed; Two annular baffles 42 are provided and located at both ends of several annular grooves 41. The distance between the two annular baffles 42 is adapted to the width of the ribbed plate 8 to be processed. Furthermore, when the upper roller 2 and the lower roller 3 rotate in coordination, they satisfy Formula 1: ; In the formula: V1 — Rotational linear velocity of upper roller 2; V2 — Rotational linear velocity of lower roller 3; r1——The radius of the finished arc surface of the stiffened plate 8 to be processed; h——The thickness of the stiffened plate to be processed is 8mm.

[0023] With this setup, when processing ribbed plates with curvature, the rotation speeds of the upper roller 2 and lower roller 3 can be set according to parameters such as the radius of the finished curved surface and the plate thickness of the ribbed plate 8 to be processed, ensuring that the ribbed plate 8 can be processed to the target curvature during the rolling process. Furthermore, by setting an annular groove 41 and an annular baffle 42 on the lower roller 3, the ribbed plate is combined with the rolling process. This allows the upper roller 2 to move downwards under the action of the adjustment mechanism, pressing the ribbed plate 8 blank together with the lower roller 3. The blank undergoes plastic deformation, forming ribs under the action of the annular groove 41, preventing the metal flow lines of the ribs from being cut, improving the mechanical properties of the processed ribbed plate, and reducing the number of processing steps for the ribbed plate.

[0024] On the other hand, the metal flow of the billet during the rolling process is divided into radial flow and axial flow. By setting annular baffles 42 on both sides of the annular groove 41, the axial flow of the billet can be effectively restricted, promoting the formation of ribs and improving the filling rate of the billet. At the same time, it can prevent the billet from shifting or slipping during processing and ensure the centering of the billet. Moreover, the setting of annular baffles 42 can also promote the flow of metal into the groove and increase the filling rate of ribs.

[0025] Moreover, by controlling the different radii of the upper roller 2 and the lower roller 3, or by controlling the different ratio of the rotation speeds of the upper roller 2 and the lower roller 3, the curvature of the finished ribbed plate can be adjusted. This enables convenient and high-quality processing of the blank into an arc-shaped ribbed plate with a fixed curvature and longitudinal ribs, simplifying the rib and bending processes, improving processing efficiency, and reducing the footprint and cost of the rolling mill.

[0026] Further research revealed that slippage is prone to occur in sheet metal during the rolling process because the forming forces applied by the upper roller 2 and lower roller 3 hinder the feed of the stiffened sheet. Common solutions include installing push plates or increasing the friction between the sheet and the two rollers to direct the resultant force in the horizontal direction as much as possible towards the feed direction. However, during the rolling of stiffened sheets, the annular groove 41 on the lower roller 3 reduces the actual contact area and friction, making slippage more likely. Therefore, it is essential to address the slippage issue during the rolling process to improve the forming quality of the stiffened sheets.

[0027] Therefore, referring to Figure 1 and Figure 2 The frame 1 is equipped with a displacement sensor 5 for detecting the travel length of the stiffened plate 8 to be processed. The cumulative travel length of the stiffened plate 8 blank detected by the displacement sensor 5 is set to L. t ; If the feed length of the stiffened plate blank to be processed is greater than L under the set condition t If the stiffened plate 8 to be processed is slipping, the speed of the lower roller 3 needs to be increased to improve the feed displacement of the blank and reduce the displacement error, thereby reducing the radius deviation of the finished stiffened plate. If the feed length of the stiffened plate blank to be processed is less than L under the set condition t If the speed of the stiffened plate 8 to be processed is too high, the speed of the lower roller 3 needs to be reduced to reduce the feed displacement of the blank, which will also reduce the displacement error and thus reduce the radius deviation of the finished stiffened plate.

[0028] Furthermore, when increasing or decreasing the speed of the lower roller 3, the speed of the upper roller 2 is adjusted synchronously to ensure that both meet the requirements of Formula 1, thereby ensuring that the finished product with stiffeners meets the target curvature requirements.

[0029] In the set state, the feed length of the stiffened plate 8 blank to be processed satisfies Formula 2: ; In the formula: L1—Feed length of the stiffened plate 8 blank to be processed under the set state; S1——Cross-sectional area of ​​the stiffened plate blank to be processed; S2——The cross-sectional area of ​​the stiffened plate after 8-roll rolling; t——Processing time of the ribbed plate 8 to be processed.

[0030] Therefore, by using displacement sensor 5 to monitor the travel length of the ribbed plate 8 after rolling in real time during the rolling process, and comparing it with the designed feed length, the result can be determined by L. tThe real-time comparison with the value of L1 directly determines whether the running status of the ribbed plate 8 blank to be processed meets the preset conditions, which can facilitate timely adjustments by operators, thereby ensuring that the processing quality of the arc-shaped ribbed plate is more reliable.

[0031] Additionally, refer to Figure 1 and Figure 2 The aforementioned regulatory mechanisms include; Slider 61 is rotatably sleeved on the axial end of upper roller 2; Guide rail 62 is fixed to frame 1, slider 61 is prevented from sliding off, and guide rail 62 is arranged along the length direction of upper roller 2 and lower roller 3; and A drive component for driving slider 61 to slide on guide rail 62.

[0032] The driver components include: The adjusting screw 63 is rotatably connected to the slider 61 at its bottom end and passes through the top of the frame 1 at its top end. Adjusting nut 64 is fixed to the top of frame 1, and adjusting screw 63 is threaded through adjusting nut 64; Handle 65 is located on top of adjusting screw 63.

[0033] In this way, by turning the handle 65, the adjusting screw 63 can be driven to rotate on the adjusting nut 64. Since the two are threadedly connected and the adjusting nut 64 is fixedly connected to the top of the frame 1, the adjusting screw 63 drives the slider 61 to move up and down on the guide rail 62 simultaneously when it rotates. Therefore, the distance between the upper roller 2 and the lower roller 3 can be flexibly adjusted. Furthermore, after the adjusting screw 63 stops rotating, it has a self-locking property on the frame 1, which can effectively reduce the rolling force required by the upper roller 2 during the rolling process, thereby achieving the purpose of saving labor and reducing the size of the equipment.

[0034] The implementation principle of a two-roll ribbed plate rolling mill according to an embodiment of this application is as follows: When processing ribbed plates with an arc shape, the rotation speeds of the upper roller 2 and lower roller 3 can be set according to parameters such as the radius of the finished arc surface and the plate thickness of the ribbed plate 8 to be processed, to ensure that the ribbed plate 8 to be processed can be processed to the target arc shape during the rolling process. Furthermore, by setting an annular groove 41 and an annular baffle 42 on the lower roller 3, the ribbed plate is combined with the rolling process, so that the upper roller 2 moves downward under the action of the adjustment mechanism and together with the lower roller 3, it squeezes the ribbed plate 8 blank. The blank undergoes plastic deformation and forms ribs under the action of the annular groove 41, which avoids the metal flow lines of the ribs being cut off, improves the mechanical properties of the processed ribbed plate, and reduces the number of processing steps for the ribbed plate.

[0035] On the other hand, the metal flow of the billet during the rolling process is divided into radial flow and axial flow. By setting annular baffles 42 on both sides of the annular groove 41, the axial flow of the billet can be effectively restricted, promoting the formation of ribs and improving the filling rate of the billet. At the same time, it can prevent the billet from shifting or slipping during processing and ensure the centering of the billet. Moreover, the setting of annular baffles 42 can also promote the flow of metal into the annular groove 41 and increase the filling rate of ribs.

[0036] Example 2: Reference Figure 4 The difference between this embodiment and Embodiment 1 is that: The frame 1 is equipped with a first drive motor 71 for driving the upper roller 2 to rotate and a second drive motor 72 for driving the lower roller 3 to rotate. The first drive motor 71 and the second drive motor 72 are connected to a main controller. The displacement sensor 5 is connected to the main controller. The main controller is configured as follows: If L1 > L t Then, the speed of the second drive motor 72 is controlled to make the two speeds similar, and then the speed is gradually restored to the original operating speed. If L1 < L t If the second drive motor 72 is decelerated, it will be reduced to make the two speeds similar, and then gradually restored to the original running speed.

[0037] The main controller is also configured to control the driving speed of the first drive motor 71 and the second drive motor 72 so that they meet the requirements of Formula 1.

[0038] With this setup, the first drive motor 71 and the second drive motor 72, under the control of the main controller, maintain a speed ratio that enables high-quality machining of the arc-shaped ribbed plate; the displacement sensor 5 monitors the feed length L of the ribbed plate 8 blank to be machined. t Real-time monitoring is performed, and the central controller then compares L in real time. t The driving speed of the second drive motor 72 is corrected by taking the values ​​of L1 and sorting them according to their magnitudes. At the same time, the driving speed of the first drive motor 71 is corrected according to the ratio of Formula 1. Ultimately, the upper roller 2 and the lower roller 3 can monitor and automatically correct the slippage or overspeed of the ribbed plate 8 to be processed during the rolling process, which greatly improves the production efficiency during rolling and can always ensure the processing quality of the arc ribbed plate.

[0039] Example 3: This application discloses a method for processing stiffened plates, based on the above-mentioned two-roll stiffened plate rolling mill, which includes the following steps: S1. Set the rotation speed of the upper roller 2 and the lower roller 3 according to the finished arc radius and plate thickness of the stiffened plate 8 to be processed, and adjust the gap between the upper roller 2 and the lower roller 3. S2. The blank of the stiffened plate 8 to be processed is fed at a uniform speed between the upper roller 2 and the lower roller 3 for rolling; S3. Real-time monitoring of the cumulative travel length L of the stiffened plate 8 on the discharge side. t And compare it with the feed length of the ribbed plate 8 blank to be processed under the set state; wherein the feed length of the ribbed plate 8 blank to be processed under the set state satisfies Formula 2: ; In the formula: L1—Feed length of the stiffened plate 8 blank to be processed under the set state; S1——Cross-sectional area of ​​the stiffened plate blank to be processed; S2——The cross-sectional area of ​​the stiffened plate after 8-roll rolling; t — Processing time of the ribbed plate 8 to be processed; S4. During the comparison, if L1 > L t If the speed of the lower roller 3 is increased to make the two rollers similar, then the speed is gradually restored to the operating speed before control. If L1 < L t If the speed of the lower roller 3 is reduced, the speed of the two rollers will be reduced to make them similar, and then the speed will be gradually restored to the operating speed before control.

[0040] Furthermore, when the upper roller 2 and the lower roller 3 rotate in coordination, they satisfy Formula 1: ; In the formula: V1 — Rotational linear velocity of upper roller 2; V2 — Rotational linear velocity of lower roller 3; r1——The radius of the finished arc surface of the stiffened plate 8 to be processed; h——The thickness of the stiffened plate to be processed is 8mm.

[0041] In this way, by monitoring the travel length of the ribbed plate after rolling in real time during the rolling process and comparing it with the designed feed length, the L... t The real-time comparison with the value of L1 directly determines whether the running status of the ribbed plate 8 blank to be processed meets the preset conditions, whether the ribbed plate blank slips or overspeeds, etc., and can promptly remind the operator or automatically adjust the speed of the lower roller 3 and the upper roller 2. This ensures both the processing quality of the ribs on the ribbed plate and the curvature of the processed arc ribbed plate meets the set requirements. Even when processing non-uniform curvature arc ribbed plates, the speed ratio of the upper roller 2 and the lower roller 3 can be dynamically adjusted to meet production requirements.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing stiffened plates, based on a two-roll stiffened plate rolling mill, the rolling mill comprising a frame and an upper roll and a lower roll rotatably mounted on the frame, the frame being provided with an adjustment mechanism for adjusting the distance between the upper roll and the lower roll, and the lower roll having the following on its outer peripheral wall: Annular grooves, which are several in number and adapted to the ribs on the ribbed plate to be processed; The annular baffle has two sections located at both ends of the plurality of annular grooves, and the distance between the two annular baffles is adapted to the width of the ribbed plate to be processed; characterized in that... The method includes the following steps: S1. Set the rotation speed of the upper roller and the lower roller according to the radius of the finished arc surface and the thickness of the plate to be processed, and adjust the gap between the upper roller and the lower roller; S2. The blank with stiffened plates to be processed is fed at a uniform speed between the upper roller and the lower roller for rolling; when the upper roller and the lower roller rotate in coordination, they satisfy Formula 1: ； In the formula: V1 - The linear velocity of the upper roller rotation; V2 - The linear velocity of the lower roller rotation; r1 - The radius of the finished arc surface of the stiffened plate to be processed; h - Thickness of the stiffened plate to be processed; S3. Real-time monitoring of the cumulative travel length L of the stiffened plate on the discharge side. t And compare it with the feed length of the ribbed slab blank to be processed under the set state; wherein the feed length of the ribbed slab blank to be processed under the set state satisfies Formula 2: ； In the formula: L1 - The feed length of the stiffened plate blank to be processed under the set state; S1 - Cross-sectional area of ​​the stiffened slab blank to be processed; S2 - Cross-sectional area of ​​the stiffened plate after roll forming; t - Processing time of the stiffened plate to be processed; S4. During the comparison, if L1 > L t If the speed of the lower roller is increased, the speed of the two rollers will be made to be similar, and then the speed will be gradually restored to the operating speed before control. If L1 < L t If the speed of the lower roller is reduced, the speed of the two rollers will be reduced to make them similar, and then the speed will be gradually restored to the operating speed before control.

2. The method for processing stiffened plates according to claim 1, characterized in that, The frame is equipped with a displacement sensor for detecting the travel length of the stiffened plate to be processed. The cumulative travel length detected by the displacement sensor is set to L. t ; If the feed length of the stiffened slab blank to be processed is greater than L under the set conditions t If the stiffened plate to be processed is slipping, the speed of the lower roller needs to be increased to increase the feed displacement of the billet, reduce the displacement error and thus reduce the radius deviation. If the feed length of the stiffened slab blank to be processed is less than L under the set conditions t If the speed of the ribbed plate to be processed is too high, the speed of the lower roller needs to be reduced to decrease the feed displacement of the billet.

3. The method for processing stiffened plates according to claim 2, characterized in that, When increasing or decreasing the speed of the lower roller, the speed of the upper roller is adjusted synchronously to ensure that the two satisfy Formula 1.

4. A method for processing stiffened plates according to any one of claims 1-3, characterized in that, The adjustment mechanism includes; The slider is rotatably sleeved on the axial end of the upper roller; A guide rail is fixedly connected to the frame, and the slider is prevented from sliding off the guide rail. The length direction of the guide rail is arranged along the arrangement direction of the upper and lower rollers. A drive assembly for driving the slider to slide on the guide rail.

5. A method for processing stiffened plates according to claim 4, characterized in that, The driving component includes: The adjusting screw has its bottom end rotatably connected to the slider and its top end penetrating the top of the frame. An adjusting nut is fixed to the top of the frame, and the adjusting screw thread passes through the adjusting nut. A handle is located at the top of the adjusting screw.

6. A method for processing stiffened plates according to claim 3, characterized in that, The frame is equipped with a first drive motor for driving the upper roller to rotate and a second drive motor for driving the lower roller to rotate. The first drive motor and the second drive motor are connected to a main controller, and the displacement sensor is connected to the main controller.

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