A plate shape control device and method for a roller straightening machine

Abstract

The present invention belongs to the field of production and processing of metallurgical machinery strip, and provides a plate shape control device and method for a roller straightening machine. The device includes a frame, an upper crossbeam, a control oil cylinder, a moving beam, a screw-down oil cylinder, an upper roll system, a lower roll system and a lower crossbeam. The frame is provided with two relatively arranged ones, and an upper crossbeam and a lower crossbeam which are arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll system and a lower roll system which are relatively arranged are provided between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the upper roll system facing the upper crossbeam, the moving beam is connected to the upper crossbeam through a control oil cylinder, and the moving beam is also connected to both frames through screw-down oil cylinders, and the lower roll system is connected to the lower crossbeam. The device can solve problems such as unreasonable force distribution of straightening rolls and difficulty in high-quality plate shape control.

Description

Technical Field

[0001] The present invention belongs to the technical field of metallurgical machinery strip production and processing, and particularly relates to a plate shape control device and method for a roller straightening machine, which are used for straightening high-temperature or normal-temperature metal strip materials, especially when straightening medium and heavy plate strip materials, creating conditions for realizing high-quality online intelligent plate shape control. Background Art

[0002] In the process of producing or processing metal strip materials such as rolled steel plates, the metal strip materials will generate warping and wavy deformations. Therefore, in order to correct such warping and wavy deformations to achieve the flattening of the metal plate, a roller straightening machine with multiple straightening rollers arranged up and down in a zigzag shape is used. The roller straightening machine passes the metal plate to be corrected in a state where the upper roller is pressed into the lower roller or the lower roller is pressed into the upper roller, and repeatedly applies bending to the metal plate to flatten the warping and wavy shapes of the metal plate, so as to improve the plate shape quality of the product or enable the raw material to smoothly enter the next process. When in use, due to the deformation of the frame and the roll system, the straightening quality will decline, and even the required plate shape cannot be achieved. Most of the existing roller straightening machines adopt split upper moving beams for bending rolls. For example, in a conventional form of bending roll device (see Figure 8 ), its upper moving beam is composed of a left half upper moving beam and a right half upper moving beam hinged together, and the oil cylinder drives the connecting rod and the left and right half upper moving beams to swing. The defect is that the deformation generated by the upper roll system has an inflection point in the middle, the force distribution of the straightening rolls and the bearings is unreasonable, the bearings are easily damaged, and the straightening quality is limited, making online plate shape control difficult. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a plate shape control device and method for a roller straightening machine, aiming to solve the problems of unreasonable force distribution of the straightening rolls and poor online plate shape control, and create conditions for realizing intelligent plate shape control.

[0004] The innovative idea of the present invention is to design a plate shape control device for a roller straightening machine, which includes a frame, an upper crossbeam, a control oil cylinder, a moving beam, a pressing oil cylinder, an upper roll system, a lower roll system, and a lower crossbeam. The frame is set as two relatively arranged ones, and an upper crossbeam and a lower crossbeam arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll system and a lower roll system are arranged relatively between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the upper roll system facing the upper crossbeam, the moving beam is connected to the upper crossbeam through a control oil cylinder, and the moving beam is also connected to both frames through pressing oil cylinders, and the lower roll system is connected to the lower crossbeam.

[0005] Another innovative idea of the present invention is to design a plate shape control device for a roller straightening machine, which includes a frame, an upper crossbeam, a control oil cylinder, a moving beam, a screw-down oil cylinder, an upper roll system, a lower roll system and a lower crossbeam. The frame is provided with two relatively arranged ones, and an upper crossbeam and a lower crossbeam arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll system and a lower roll system are arranged between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the lower roll system facing the lower crossbeam, and the moving beam is connected to the lower crossbeam through a control oil cylinder, and the moving beam is also connected to the two frames through screw-down oil cylinders, and the upper roll system is connected to the upper crossbeam.

[0006] Another innovative idea of the present invention is to design a plate shape control device for a roller straightening machine, which includes a frame, an upper crossbeam, a control oil cylinder, a moving beam, a screw-down oil cylinder, an upper roll system, a lower roll system and a lower crossbeam. The frame is provided with two relatively arranged ones, and an upper crossbeam and a lower crossbeam arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll system and a lower roll system are arranged between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the upper roll system facing the upper crossbeam and a moving beam is connected to the corresponding side of the lower roll system facing the lower crossbeam, and the respective moving beams are connected to the corresponding upper crossbeam and lower crossbeam through control oil cylinders respectively, and the respective moving beams are also connected to the two frames through screw-down oil cylinders.

[0007] Further, the number and layout structure of the control oil cylinders are determined according to the specifications of the roller straightening machine and the moving beam.

[0008] Further, the number of the control oil cylinders is 1 to 5.

[0009] Further, the layout structure of the control oil cylinders is a straight line type, a square type or a plum blossom type.

[0010] Further, a roller path is provided on the frame.

[0011] Further, the straightening roll profiles of the upper roll system and the lower roll system adopt a flat straight cylindrical shape or a convex cylindrical curved surface shape.

[0012] Further, the drive form of the straightening rolls of the upper roll system and the lower roll system is multi-group centralized drive or single-roll independent drive.

[0013] The present invention also provides a plate shape control method for a roller straightening machine, which includes: using the control oil cylinders arranged on the moving beam and the screw-down oil cylinders on both sides of the control oil cylinders to form a common resultant force and act on the moving beam to control the moving beam to generate different required continuous straight or convex-concave curve deformations on the corresponding upper roll system or / and lower roll system.

[0014] The advantages of the present invention are as follows:

[0015] 1. The plate shape control device of the roller straightening machine of the present invention avoids the deformation inflection points that appear in the middle of the straightening roller surface in the traditional straightening roller system, and can make the force distribution of the straightening rollers reasonable, so that the bearings or straightening rollers are not easily damaged. It has the characteristics of high-quality plate shape control, making the plate shape control operation of the plate and strip straightening machine simple and capable of obtaining high-precision straightened plate shapes.

[0016] 2. The plate shape control device of the roller straightening machine of the present invention adds a plurality of control cylinders in the middle of the upper crossbeam or lower crossbeam and the moving beam, and respectively controls the pressure of each control cylinder and forms a resultant force P3. It also combines with the resultant force P1 of the screwdown cylinder on the operator side of the frame and the resultant force P2 of the screwdown cylinder on the drive side to act on the moving beam together to bear the distributed load q of the straightened sheet material, and controls the moving beam and the upper or lower roller system to generate different continuous straight or convex and concave curve deformations as required, creating conditions for realizing high-quality on-line intelligent plate shape control.

[0017] 3. The plate shape control device of the roller straightening machine of the present invention can straighten sheet materials (not limited to this specific value): temperature range: normal temperature to 1100 °C, sheet material thickness 5 - 100 mm, width 1000 - 5500 mm, the number of upper and lower straightening rollers is 5 - 17, and the pressure of each cylinder and its resultant force P3 that are respectively controlled can be selected in the range of 2 - 10% of the maximum straightening force according to the size of the straightening machine, that is, P3 ≈ 100 - 6000 kN.

[0018] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings, where:

[0020] Figure 1 is the main structural view of the plate shape control device of the roller straightening machine of the present invention. The left side is the operator side, and the right side is the drive side.

[0021] Figure 2 is another main structural view of the plate shape control device of the roller straightening machine of the present invention, different from Figure 1 in the arrangement quantity and position of the control cylinders.

[0022] Figure 3 is Figure 1 the A - A side view in, the left side is the inlet side, and the right side is the outlet side.

[0023] Figure 4 is Figure 1Side view in the B direction

[0024] Figure 5 This is a schematic diagram of the force on the upper roll system when the plate shape control device of the roll straightening machine of the present invention straightens the plate material

[0025] Figure 6 is Figure 1 or Figure 2 Five layout schematic diagrams of the control cylinder in the C direction in, a is a single control cylinder, b and c are two control cylinders, d and e are three control cylinders, f is four control cylinders, and g is five control cylinders

[0026] Figure 7 This is a schematic diagram of the control device of the roll straightening machine of the present invention for controlling the deformation position of the upper roll system. a is the flat center position of the straightening roll surface, b is the convex bending deformation of the straightening roll surface, c is the right-side inclined bending deformation of the straightening roll surface, d is the left-side inclined bending deformation of the straightening roll surface, and e is the concave bending deformation of the straightening roll surface

[0027] Figure 8 This is a structural schematic diagram of the existing bending roll device of the roll straightening machine. a is the front view, b is the convex fold line deformation of the straightening roll, and c is the concave fold line deformation of the straightening roll

[0028] Reference numerals: 1 is the frame, 2 is the upper crossbeam, 3 is the control cylinder, 4 is the moving beam, 5 is the pressing cylinder, 6 is the upper roll system, 7 is the lower roll system, 8 is the lower crossbeam, 9 is the roller table, 10 is the straightened plate material, and 11 is the straightening roll Specific embodiments

[0029] The following illustrates the embodiments of the present invention through specific specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other

[0030] Such as Figures 1-4As shown in the figure, a plate shape control device of a roller straightening machine mentioned in this embodiment mainly consists of a frame 1, an upper crossbeam 2, a control oil cylinder 3, a moving beam 4, a screwdown oil cylinder 5, an upper roll system 6, a lower roll system 7, a lower crossbeam 8, and a roller table 9, where: The frame 1 serves as a support frame, and there are two arranged oppositely. An upper crossbeam 2 and a lower crossbeam 8 arranged vertically corresponding to each other are fixedly installed between the two frames 1 to form a frame structure; between the upper crossbeam 2 and the lower crossbeam 8, there are an upper roll system 6 and a lower roll system 7 arranged oppositely. They are all conventional devices, including straightening rolls 11, support rolls, bearings, bearing seats, boxes, etc. The roll shape of the straightening rolls 11 can adopt a flat straight cylindrical shape or a vertically symmetric slightly convex cylindrical curved surface shape in the middle. The transmission devices of the straightening rolls 11 can respectively adopt motor, gear, coupling centralized transmission, multi-group transmission, or single-roll transmission; between the upper roll system 6 and the upper crossbeam 2, there are a control oil cylinder 3 and a moving beam 4, and there is also a screwdown oil cylinder 5 connected between the moving beam 4 and the frame. That is, the moving beam 4 is connected to the upper roll system 6 and is used to control the deformation of the straightening roll surface of the upper roll system. The control oil cylinder 3 is connected to the upper crossbeam 2 and acts on the moving beam 4 connected to the upper crossbeam 2. The screwdown oil cylinder 5 is connected to the frame 1 and acts on the moving beam 4 connected to the upper roll system 6; the lower roll system 7 is installed on the lower crossbeam 8; the roller table 9 is provided on the inlet side and the outlet side on both sides of the frame to facilitate the entry and exit of the straightening sheet 10. In this way, by adding a control oil cylinder in the middle of the upper crossbeam and the moving beam and installing a screwdown oil cylinder between the frame and the moving beam on both sides of the control oil cylinder, the plate shape control device of this roller straightening machine can make the force distribution of the straightening rolls reasonable, the bearings or the straightening rolls are not easily damaged, and it has the characteristics of high-quality plate shape control, making the plate shape control operation of the plate and strip straightening machine simple and capable of obtaining a high-precision straightened plate shape.

[0031] Combined with Figure 5 、 6As shown, the number and arrangement structure of the control cylinders 3 in this embodiment can be determined according to the specifications of the roller straightening machine and the moving beam 4. That is, the number of control cylinders can be 1 to 5, and the corresponding arrangement structures can be linear, square, or plum blossom type. And there are two press cylinders 5 arranged side by side and spaced apart on a single frame 1. In this way, the resultant force P3 of the control cylinders 3, together with the resultant forces P1 and P2 of the left and right press cylinders 5, act on the moving beam 4 together, bear the distributed load q of the straightened sheet, and optimize the design of the structural dimensions of each part and the pressure of each cylinder respectively. During the straightening process, the different convex and concave curve deformations of the straightening rolls are controlled in a timely manner and the sheet shape is controlled, and the middle wave, left wave, right wave of the metal strip are straightened respectively, or according to the different sheet shape defect distributions detected actually. Among them, P1 is the resultant force of the left press cylinder, P2 is the resultant force of the right press cylinder, and P1 + P2 ≤ 60000 kN; P3 is the resultant force of the control cylinder, P3 = 100 - 6000 kN; q is the distributed force of the straightened sheet; b is the width of the straightened sheet, b = 1000 - 5500 mm; h is the thickness of the straightened sheet, h = 5 - 100 mm. (Not limited to specific values)

[0032] In another embodiment, according to the needs of the straightening machine, it can be arranged separately or simultaneously between the lower crossbeam 8 and the lower roll system 7 in a similar manner. That is, another moving beam is connected to the lower roll system 7 and is used to control the deformation of the straightening roll surface of the lower roll system, another control cylinder is connected to the lower crossbeam 8 and acts on the moving beam connected to the lower crossbeam, and another press cylinder is connected to the frame 1 and acts on the moving beam connected to the lower roll system 7. Whether it is arranged on one side of the upper roll system or on one side of the lower roll system, it has the same effect. Compared with the single-side arrangement, setting it on both the upper roll system and the lower roll system is more conducive to adapting to the adjustment of the straightened sheet, and the thickness range of the straightened sheet is larger.

[0033] As Figure 7 shown, a method for controlling the sheet shape of a roller straightening machine mentioned in this embodiment is based on the sheet shape control device of the roller straightening machine, including: a moving beam is connected to the upper roll system or / and the lower roll system, and the control cylinder connected to the moving beam and the press cylinders located on both sides of the control cylinder are used to form a common resultant force to act on the moving beam, so as to control the moving beam to generate different continuous straight or convex and concave curve deformations required for the upper roll system or / and the lower roll system connected thereto. In this way, the resultant force P3 of the control cylinder, together with the resultant force P1 of the left press cylinder and the resultant force P2 of the right press cylinder, act on the moving beam, and the upper roll system or / and the lower roll system can be tilted towards the operating side, driving side, inlet side, and outlet side of the frame respectively to adapt to the straightened strip.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A plate shape control device for a roller straightening machine, characterized in that, It includes a frame (1), an upper crossbeam (2), a control cylinder (3), a moving beam (4), a screw-down cylinder (5), an upper roll set (6), a lower roll set (7) and a lower crossbeam (8). The frame is provided with two relatively arranged parts, and an upper crossbeam and a lower crossbeam which are arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll set and a lower roll set which are relatively arranged are provided between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the upper roll set facing the upper crossbeam, and the moving beam is connected to the upper crossbeam through 1 to 5 control cylinders, and the control cylinders are arranged in a linear shape, a square shape or a plum blossom shape; the moving beam is also connected to the two frames through screw-down cylinders, and the screw-down cylinders are symmetrically arranged on the operating side and the driving side of the frame, and the combined force of the control cylinder and the screw-down cylinder acts on the moving beam to drive the upper roll set to generate a straight or convex-concave curve deformation without continuous inflection points; the lower roll set is connected to the lower crossbeam.

2. A plate shape control device for a roller straightening machine, characterized in that, It includes a frame (1), an upper crossbeam (2), a control cylinder (3), a moving beam (4), a screw-down cylinder (5), an upper roll set (6), a lower roll set (7) and a lower crossbeam (8). The frame is provided with two relatively arranged parts, and an upper crossbeam and a lower crossbeam which are arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll set and a lower roll set which are relatively arranged are provided between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the lower roll set facing the lower crossbeam, and the moving beam is connected to the lower crossbeam through 1 to 5 two control cylinders, and the control cylinders are arranged in a linear shape, a square shape or a plum blossom shape; the moving beam is also connected to the two frames through screw-down cylinders, and the screw-down cylinders are symmetrically arranged on the operating side and the driving side of the frame, and the combined force of the control cylinder and the screw-down cylinder acts on the moving beam to drive the lower roll set to generate a straight or convex-concave curve deformation without continuous inflection points; the upper roll set is connected to the upper crossbeam.

3. A plate shape control device for a roller straightening machine, characterized in that, It includes a frame (1), an upper crossbeam (2), a control cylinder (3), a moving beam (4), a screw-down cylinder (5), an upper roll set (6), a lower roll set (7) and a lower crossbeam (8). The frame is provided with two relatively arranged parts, and an upper crossbeam and a lower crossbeam which are arranged in an up-and-down corresponding manner are fixed between the two frames; an upper roll set and a lower roll set which are relatively arranged are provided between the upper crossbeam and the lower crossbeam; a moving beam is connected to the corresponding side of the upper roll set facing the upper crossbeam, and a moving beam is connected to the corresponding side of the lower roll set facing the lower crossbeam, and the respective moving beams are respectively connected to the corresponding upper crossbeam and lower crossbeam through 1 to 5 control cylinders, and the control cylinders are arranged in a linear shape, a square shape or a plum blossom shape; the respective moving beams are also connected to the two frames through screw-down cylinders, and the screw-down cylinders are symmetrically arranged on the operating side and the driving side of the frame, and the combined force of the control cylinder and the screw-down cylinder acts on the moving beam to drive both the upper roll set and the lower roll set to generate a straight or convex-concave curve deformation without continuous inflection points.

4. The plate shape control device of a roller straightening machine according to any one of claims 1-3, characterized in that, The number and arrangement structure of the control cylinders are determined according to the specifications of the roller straightening machine and the moving beam.

5. The plate shape control device of a roller straightening machine according to any one of claims 1-3, characterized in that, A roller path (9) is provided on the frame.

6. The plate shape control device of the roller straightening machine according to any one of claims 1-3, characterized in that The straightening roll profiles of the upper roll set and the lower roll set adopt a flat linear cylindrical shape or a convex cylindrical curved surface shape.

7. The plate shape control device of a roller straightening machine according to any one of claims 1-3, characterized in that, The transmission form of the straightening rolls of the upper roll set and the lower roll set is multi-group centralized transmission or single-roll independent transmission.

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