Linear straightening device for plates
By introducing static and dynamic pressure adjustment components into the plate straightening device, flexible straightening of plates of different thicknesses is achieved, solving the problem of poor versatility of existing equipment and improving straightening quality and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-17
AI Technical Summary
Existing sheet metal straightening equipment cannot meet the straightening needs of sheets of different thicknesses, resulting in high production costs and low efficiency.
A linear straightening device including static and dynamic pressure adjustment components was designed. By manually or automatically adjusting the distance between the first pressure roller and the support roller, it can adapt to the straightening requirements of plates of different thicknesses.
It improves the versatility and production efficiency of the equipment, ensures the straightening quality and stability, and simplifies the operation and maintenance process.
Smart Images

Figure CN223996976U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sheet metal processing equipment, and in particular to a linear straightening device for sheet metal. Background Technology
[0002] In the sheet metal processing industry, sheets often bend or deform during production, transportation, and storage, which seriously affects the quality of the sheets and the accuracy of subsequent processing. Therefore, the sheets need to be straightened before entering the next processing step.
[0003] Existing sheet metal straightening equipment has many problems. Some straightening equipment has a relatively simple structure and is only suitable for straightening sheets of a single thickness. When it is necessary to straighten sheets of different thicknesses, it is necessary to replace the straightening equipment or make complex adjustments to the equipment. This not only increases production costs but also reduces production efficiency. Utility Model Content
[0004] The problem that this invention aims to solve is that existing sheet metal straightening equipment has poor versatility and cannot adapt to the straightening needs of sheets of different thicknesses.
[0005] To address the aforementioned technical problems, this application provides a linear straightening device for sheet metal, comprising a platform, a frame arranged along the length of the platform and composed of side plates and a bottom plate; support plates symmetrically arranged at both ends of the side plates in an L-shape to support sheet metal feeding and unloading; multiple support rollers evenly and spacedly installed along the length of the side plates and connected to a motor mounted on the platform via a gear set; a frame plate arranged above the side plates in an n-shaped structure with the opening facing downwards to support a first pressure roller; first pressure rollers arranged at intervals and side-by-side along the length of the frame plate to apply downward pressure to the sheet metal; and a pressure adjusting assembly. This is a static, manually adjustable structure, comprising a carrier plate, a support rod, a screw sleeve, a screw rod, and a pressure plate. The carrier plate is horizontally arranged above the frame; the support rod is vertically arranged around the lower part of the carrier plate and connected to the frame; the screw sleeve is vertically arranged downwards along the center of the upper part of the carrier plate; the screw rod is arranged inside the screw sleeve and meshes with it; the pressure plate is arranged at the lower end of the screw rod and is used to abut against the upper surface of the frame plate, thereby applying downward pressure to the frame plate to keep the distance between the first pressure roller and the support plate relatively constant during the straightening process; by turning the handwheel, the pressure plate can be moved vertically up and down with the screw rod, thereby adjusting the straightening movement distance between the first pressure roller and the support roller.
[0006] Because the straightening device of this application is designed with a statically manually adjustable pressure regulating component, the straightening space can be conveniently adjusted through the pressure regulating component to adapt to the straightening needs of plates of different thicknesses, thus solving the problem that the existing plate straightening equipment has poor versatility and cannot adapt to the straightening needs of plates of different thicknesses.
[0007] Compared with the prior art, the present invention has the following beneficial effects:
[0008] 1. High versatility: By setting static adjustable pressure components, operators can easily adjust the distance between the first pressure roller and the support roller by turning the handle according to the thickness of the plate to be straightened, thereby adapting to the straightening needs of plates of different thicknesses without the need to change equipment or make complex adjustments, which greatly improves the versatility and production efficiency of the equipment.
[0009] 2. Good straightening effect: The structure of this straightening device can effectively ensure the stability of the sheet material during the straightening process, avoiding the problem of the end or tail of the sheet material lifting due to uneven force during conveying and straightening, thus improving the straightening quality and enabling the straightened sheet material to meet the requirements of high-precision processing.
[0010] 3. Easy to operate: The handle design of the static adjustment pressure piece makes it simple and convenient to adjust the distance between the first pressure roller and the idler roller. Operators do not need professional skills or complicated tools to complete the adjustment. At the same time, the motor drive enables the synchronous rotation of the idler roller, reducing manual operation and improving the degree of automation.
[0011] 4. Easy maintenance: The straightening device has a simple and reasonable structure, and the installation and disassembly of each component are convenient, facilitating daily maintenance and upkeep. When components are worn or damaged, they can be quickly replaced, reducing the difficulty and cost of equipment maintenance. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of Example 1.
[0013] Figure 2 This is a schematic diagram of the adjustable pressure component structure in Example 1.
[0014] Figure 3 This is a schematic diagram of the adjustable pressure component structure in Example 2.
[0015] Figure 4 This is a schematic diagram of the pressure plate assembly structure in Example 3.
[0016] In the picture:
[0017] 1. Stand;
[0018] 2. Frame; 201. Side panel; 202. Base plate; 203. Support plate;
[0019] 3. Idler rollers;
[0020] 4. Gears;
[0021] 5. Electric motor;
[0022] 6. First pressure roller;
[0023] 7. Frame plate;
[0024] 8. Adjustable clamping parts; 801. Carrier plate; 802. Frame rod; 803. Handwheel; 804. Screw; 805. Screw sleeve; 806. Pressure plate;
[0025] 807. First horizontal plate; 808. First guide rod; 809. First sliding rod; 810. First spring;
[0026] 9. Pressure plate assembly; 901. Second guide rod; 902. Second horizontal plate; 903. Second slide rod; 904. Second spring; 905. Washer; 906. Slider; 907. Second pressure roller; 908. Tray; 909. Shaft; 910. Button; 911. Handle; 912. Edge. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example
[0028] This application relates to a linear straightening device for sheet metal, such as... Figure 1-2 As shown, the straightening device includes a platform 1 that serves as a basic support. A frame 2 is arranged above the platform 1 along its length. The frame 2, as the main load-bearing and working component of the straightening device, consists of side plates 201 and a base plate 202. The side plates 201 are symmetrically and vertically arranged on both sides of the upper length of the base plate 202, providing stable lateral support for the straightening device.
[0029] The upper part of the side plate 201 has L-shaped support plates 203 arranged at intervals and symmetrically at both ends along the length direction to support the feeding and discharging of the plate. The design of the L-shaped support plates 203 enables the plate to be effectively supported when entering and exiting the straightening device, avoiding the plate from sagging or deforming due to its own weight, and ensuring that the plate can enter and leave the straightening area smoothly.
[0030] The upper part of the side plate 201 is evenly and spaced along the middle of its length direction with idler rollers 3. The two ends of the idler rollers 3 are connected to the side plate 201 through bearing seats, so that the idler rollers 3 can rotate freely. On the outer side of one end of the idler rollers 3, there are intermeshing gears 4 arranged vertically and intermittently along its length direction. This gear 4 transmission structure ensures that all idler rollers 3 can rotate synchronously, thereby ensuring the smooth conveying of the plate during the straightening process. A motor 5 is arranged on the outer side of one of the gears 4 and connected to it by a key. The motor 5 is fixed to the upper part of the frame 1 by bolts. The motor 5 serves as a power source, driving the gear 4 to rotate, thereby driving all the idler rollers 3 to rotate synchronously.
[0031] Above the idler roller 3, multiple first pressure rollers 6 are arranged side by side along its length to apply downward pressure to the plate. At both ends of the first pressure roller 6, there are n-shaped frame plates 7 connected to it by bearings and with their openings facing downwards. The design of the frame plates 7 not only provides stable support for the first pressure roller 6, but also facilitates the adjustment of the distance between the first pressure roller 6 and the idler roller 3.
[0032] To accommodate the straightening operation of large batches of plates of the same thickness, an adjustable pressure component 8 is installed on the top of the frame plate 7. In this embodiment, the adjustable pressure component 8 is designed as a static pressure component. The adjustable pressure component 8 includes a carrier plate 801, a support rod 802, a handwheel 803, a screw 804, a screw sleeve 805, and a pressure plate 806. The carrier plate 801 is horizontally arranged above the frame 2. The lower part of the carrier plate 801 is vertically arranged with support rods 802 connected to the frame 2 by bolts, ensuring the stability of the carrier plate 801. A screw sleeve 805 is vertically arranged downward at the center of the upper part of the carrier plate 801. The screw 804 is meshed with the screw sleeve 805. The lower end of the screw 804 is arranged with a pressure plate 806 connected to it by bolts. The pressure plate 806 is used to abut against the upper surface of the frame plate 7, thereby applying downward pressure to the frame plate 7, so that the distance between the first pressure roller 6 and the support plate 203 is relatively constant during the plate straightening process.
[0033] To facilitate the rotation of the screw 804, a handwheel 803 is fixedly connected to the top of the screw 804. When straightening plates of different thicknesses is required (although this embodiment mainly targets plates of the same thickness, the adjustable gap structure still has a certain degree of flexibility), the operator can drive the screw 804 to rotate and raise the pressure plate 806 by rotating the handwheel 803. When the pressure plate 806 descends, it applies greater downward pressure to the frame plate 7, thereby reducing the distance between the first pressure roller 6 and the support roller 3. Conversely, when the pressure plate 806 rises, the distance between the first pressure roller 6 and the support roller 3 increases. By adjusting the distance between the first pressure roller 6 and the support roller 3, the straightening requirements of plates of different thicknesses can be adapted. However, in this embodiment, the straightening is mainly for plates of the same thickness, so the adjustable gap operation is relatively infrequent.
[0034] Working principle: During the straightening process, the sheet material is first placed on the L-shaped support plate 203, supported by the L-shaped support plate 203, and manually pushed into the straightening area. The motor 5 drives the gear 4 to rotate, which in turn drives all the idler rollers 3 to rotate synchronously. The sheet material moves forward under the conveying of the idler rollers 3. At the same time, the first pressure roller 6 applies downward pressure to the sheet material under the action of the adjusting pressure component 8. Together with the idler rollers 3, the sheet material is straightened. Since the adjusting pressure component 8 is a static pressure component and is used to straighten sheet materials of the same thickness, the distance between the first pressure roller 6 and the idler rollers 3 remains relatively constant during the straightening process, ensuring the stability and consistency of the straightening effect.
[0035] Instructions for use: First, depending on the thickness of the sheet material to be straightened, if it differs from the thickness of previously straightened sheets, the distance between the first pressure roller 6 and the support roller 3 can be adjusted by rotating the handwheel 803. Rotate the handwheel 803 clockwise or counterclockwise to raise or lower the pressure plate 806 until a suitable distance is achieved. For batch straightening of sheets of the same thickness, this step can be completed before the first straightening, and subsequent operations do not need to be repeated. Then, place the sheet material to be straightened on the L-shaped support plate 203 at one end of the straightening device, so that one end of the sheet material contacts the support roller 3. The sheet material should be placed stably to avoid tilting or shifting. The operator can manually assist the sheet material to smoothly enter the conveying area of the support roller 3. Then, start the motor 5. The motor 5 drives the gear 4 to rotate, which in turn drives all the support rollers 3 to rotate synchronously. The rotation of the support rollers 3 conveys the sheet material to the other end of the straightening device. During the sheet material conveying process, the first pressure roller 6 applies downward pressure to the sheet material under the action of the adjusting pressure component 8. The first pressure roller 6 and the support roller 3 work together... The same function is used to straighten the sheet metal. Since the adjusting pressure component 8 is a static pressure component, and for sheet metal of the same thickness, the distance between the first pressure roller 6 and the idler roller 3 remains relatively constant, ensuring the stability and consistency of the straightening effect. When the sheet metal is conveyed to the other end of the straightening device, it will slide off the L-shaped pallet 203 to complete the straightening operation. The operator can collect the straightened sheet metal at the end of the straightening device. If multiple sheet metals need to be straightened continuously, the next sheet metal can be placed on the L-shaped pallet 203 at the feeding end when the previous sheet metal is about to be straightened, so as to achieve continuous feeding and straightening. When all sheet metals are straightened, the motor 5 is turned off to stop the operation of the straightening device. The straightening device should be maintained regularly, including cleaning the idler roller 3, gear 4, first pressure roller 6 and other components, checking the wear of each component, and replacing any severely worn components in time. At the same time, check whether the screw 804, screw sleeve 805 and other components of the adjusting pressure component 8 are loose to ensure the stability of the adjusting pressure component 8.
[0036] In summary, the linear straightening device for sheet metal provided in this embodiment achieves efficient and stable straightening operation for a large batch of sheet metal of the same thickness through reasonable structural design. Example
[0037] To accommodate alternating straightening operations on plates of different thicknesses, this embodiment improves the adjusting clamp 8, making it a dynamic clamp, such as... Figure 3 As shown, the adjustable clamping component 8 is a dynamic clamping component, including a carrier plate 801, a support rod 802, a first horizontal plate 807, a first guide rod 808, a first sliding rod 809, and a first spring 810. The carrier plate 801 is horizontally arranged above the frame 2. The lower part of the carrier plate 801 is vertically arranged with support rods 802 connected to the frame 2, ensuring the stability of the carrier plate 801 and providing a reliable support foundation for the entire adjustable clamping component 8. The upper part of the carrier plate 801 is vertically arranged with first guide rods 808 that serve as guides. The first guide rods 808 provide precise guidance for the up and down movement of the first horizontal plate 807, ensuring the stability and verticality of the first horizontal plate 807 during movement. A bearing is horizontally placed between two first guide rods 808. The first horizontal plate 807, which supports the first horizontal plate, can move up and down under the guidance of the first guide rod 808. The upper part of the first horizontal plate 807 is symmetrically and vertically arranged with a first sliding rod 809 that passes through the first horizontal plate 807 and the carrier plate 801 and is connected to the frame plate 7. The first sliding rod 809 can slide freely in the first horizontal plate 807 and the carrier plate 801, and is connected to the frame plate 7 to transmit the up and down movement of the frame plate 7 to the first horizontal plate 807. A first spring 810 is sleeved on the outside of the first sliding rod 809, one end of which abuts against the first horizontal plate 807. The other end of the first spring 810 abuts against a nut arranged on the upper part of the first sliding rod 809. The setting of the first spring 810 gives the first horizontal plate 807 the ability to elastically buffer.
[0038] Working principle: When plates of different thicknesses enter the straightening area, the first pressure roller 6 will first contact the plate. Due to the different plate thicknesses, the pressure on the first pressure roller 6 will also be different. When the plate is thicker, the first pressure roller 6 will move upward, pressing the first slide bar 809 to move upward. The first slide bar 809 will drive the first horizontal plate 807 to move upward. At this time, the first spring 810 is compressed. The elastic contraction of the first spring 810 can buffer the displacement of the first pressure roller 6 caused by the change in plate thickness, so that the first pressure roller 6 can adaptively perform lifting and lowering operations according to the plate thickness. When a thinner plate enters the straightening area, the pressure on the first pressure roller 6 decreases. Under the action of its own elastic force, the first spring 810 pushes the first horizontal plate 807 to move downward, which in turn drives the first slide bar 809 and the first pressure roller 6 to move downward, so that the distance between the first pressure roller 6 and the support roller 3 adapts to the straightening requirements of the thinner plate.
[0039] Instructions for use: First, place the plates of different thicknesses to be straightened sequentially on the L-shaped support plate 203 at one end of the straightening device, ensuring one end of the plate contacts the idler roller 3. The plates should be placed stably to avoid tilting or shifting. The operator can manually assist the plates to smoothly enter the conveying area of the idler roller 3. Then, start the motor 5. The motor 5 drives the gear 4 to rotate, which in turn drives all the idler rollers 3 to rotate synchronously. The rotation of the idler rollers 3 conveys the plates to the other end of the straightening device. During the plate conveying process, the first pressure roller 6, under the action of the dynamic adjustment pressure component 8, adaptively rises and falls according to the thickness of the plate, working together with the idler rollers 3 to straighten the plates. When the plates are conveyed to the other end of the straightening device, they will... The straightening operation is completed by sliding the L-shaped pallet 203 out. The operator can collect the straightened plates at the end of the straightening device. If it is necessary to straighten multiple plates of different thicknesses continuously, the next plate can be placed on the L-shaped pallet 203 at the feeding end when the previous plate is about to be straightened, so as to achieve continuous feeding and straightening. When all plates are straightened, the motor 5 is turned off and the operation of the straightening device is stopped. The straightening device should be maintained regularly, including cleaning the idler roller 3, gear 4, first pressure roller 6 and other components, checking the wear of each component, and replacing any severely worn components in time. At the same time, check whether the springs, slides and other components of the dynamic adjustment pressure component 8 are loose or damaged to ensure the stability of the adjustment pressure component 8.
[0040] In summary, the linear straightening device for sheet metal provided in this embodiment, by employing a dynamic adjustable pressure element 8, achieves adaptive operation for alternating straightening of sheet metal of different thicknesses, thereby improving the versatility and flexibility of the straightening device. Example
[0041] To prevent the ends or tails of the sheet material from warping during the straightening process, this embodiment adds pressure plate assemblies 9 at both ends of the carrier plate 801 to prevent warping. Figure 4 As shown, the pressure plate assembly 9 includes a second guide rod 901, a second horizontal plate 902, a second slide rod 903, a second spring 904, a washer 905, a slider 906, and a second pressure roller 907. The upper perimeter of the carrier plate 801 is vertically arranged with second guide rods 901 that serve a guiding function and penetrate the carrier plate 801. The second guide rods 901 provide precise guidance for the up-and-down movement of the second horizontal plate 902, ensuring the stability and verticality of the second horizontal plate 902 during movement. Two second guide rods 904... A second horizontal plate 902 is placed horizontally between the guide rods 901 to provide support. The second horizontal plate 902 can move up and down under the guidance of the second guide rods 901. A second sliding rod 903 is symmetrically and vertically arranged on the upper part of the second horizontal plate 902, passing through the second horizontal plate 902 and connected to the carrier plate 801. The second sliding rod 903 can slide freely between the second horizontal plate 902 and the carrier plate 801, and is connected to the carrier plate 801, thus relating the up and down movement of the second horizontal plate 902 to the carrier plate 801.
[0042] A second spring 904 is sleeved on the outside of the second slide rod 903, with one end abutting against the second horizontal plate 902. The other end of the second spring 904 abuts against a nut arranged on the upper part of the second slide rod 903. To ensure sufficient elasticity, two second springs 904 are spliced together, with the two springs 904 abutting against each other through a washer 905 sleeved on the second slide rod 903. When the second horizontal plate 902 is subjected to an external force and moves upward, the second spring 904 is compressed and stores elastic potential energy. When the external force disappears, the second spring 904 releases its elastic potential energy, pushing the second horizontal plate 902 downward. The lower end of the second guide rod 901 is provided with a slider 906 that abuts against it and is slidably connected to the support rod 802. The slider 906 can slide horizontally on the support rod 802, providing support and guidance for the movement of the second pressure roller 907. The second pressure roller 907 is horizontally placed between the sliders 906 and connected to them through bearings. The second pressure roller 907 can rotate freely under the support of the sliders 906. When the plate enters the straightening device, the second pressure roller 907 contacts the plate and applies downward pressure to the plate with the help of its own weight and the elastic force of the spring, thereby playing a role in preventing warping and correcting the plate entering and leaving the straightening device.
[0043] To facilitate adjustment of the maximum correction distance between the second pressure roller 907 and the support roller 3 according to the thickness of the sheet material, and to ensure effective anti-tilting and correction, the pressure plate assembly 9 also includes a tray 908, a shaft 909, a convex button 910, and a handle 911. A horizontally rotatable tray 908 is also arranged on the upper part of the frame plate 7 below the second horizontal plate 902. The tray 908 is connected to the frame plate 7 via a vertically arranged shaft 909 at its center. The shaft 909 is connected to the tray 908 and the frame plate 7 via bearings, allowing the tray 908 to rotate freely horizontally. A gradually tapering arc-shaped convex edge 912 is formed at the top edge of the tray 908. The raised edges 912 at the same height represent different maximum correction distance settings. Symmetrically arranged and spaced below the second horizontal plate 902 are raised buttons 910 for abutting against the raised edges 912. When the tray 908 rotates, the position of the raised edges 912 changes, and the raised buttons 910 abut against the raised edges 912 at different heights, thereby changing the position of the second horizontal plate 902, and thus changing the maximum correction distance between the second pressure roller 907 and the support roller 3. In order to facilitate the rotation of the tray 908, a handle 911 with a threaded connection extends outward from one side of the tray 908. The operator can rotate the tray 908 by rotating the handle 911 to adjust the maximum correction distance.
[0044] Working principle: When the board enters the straightening device, the ends or tails of the board may warp due to uneven force. At this time, the second pressure roller 907 first contacts the board. Due to the elastic force of the second spring 904, the second pressure roller 907 applies downward pressure to the board, flattening the warped board. At the same time, during the board conveying process, the second pressure roller 907 always maintains contact with the board, continuously preventing warping and correcting the board. When it is necessary to adjust the maximum correction distance between the second pressure roller 907 and the support roller 3, the operator can turn the handle 911 to drive the tray 908 to rotate, so that the convex button 910 abuts against the convex edge 912 of different heights, thereby changing the position of the second horizontal plate 902 and realizing the adjustment of the maximum correction distance.
[0045] Usage: Same as in Example 2, place the sheet material to be straightened on the L-shaped support plate 203 at one end of the straightening device, so that one end of the sheet material contacts the roller 3, and assist the sheet material to smoothly enter the conveying area of the roller 3. Start the motor 5 to make the roller 3 rotate, driving the sheet material to be conveyed to the other end of the straightening device. During the conveying process, the second pressure roller 907 of the pressure plate assembly 9 performs anti-warping and correction functions on the sheet material. Closely observe the straightening situation of the sheet material, especially whether the ends and tails of the sheet material warp. If warping is found and not effectively corrected, the maximum correction distance between the second pressure roller 907 and the roller 3 can be adjusted appropriately. When the sheet material is conveyed to the other end of the straightening device, it slides off the L-shaped support plate 203, completing the straightening operation. The operator collects the straightened sheet material. After all the sheet material is straightened, turn off the motor 5 to stop the operation of the straightening device. Clean and maintain the pressure plate assembly 9, and check whether the elasticity of the second spring 904 is weakened, whether the slider 906 slides smoothly, and whether the tray 908 rotates flexibly. If any problems are found, deal with them in time.
[0046] In summary, the linear straightening device for sheet metal provided in this embodiment effectively prevents the end or tail of the sheet metal from warping during the straightening process by adding a pressure plate assembly 9. At the same time, the structural design that allows for convenient adjustment of the maximum correction spacing improves the versatility and practicality of the straightening device.
[0047] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.
[0048] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).
[0049] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A straight-line straightening device for plate material, comprising a rack, characterized in that: a frame is arranged along the length direction above the rack and is composed of side plates and a bottom plate; a supporting plate is symmetrically arranged at both ends of the length direction of the side plates and is in L shape to support the plate material in and out; a plurality of supporting rollers are uniformly and spacedly arranged along the length direction of the side plates and are connected with a motor arranged on the upper part of the rack through a gear set; a frame plate is arranged above the side plates and is in n shape with an opening downward to support the first pressing roller; the first pressing roller is spacedly and side by side arranged inside the length direction of the frame plate to apply downward pressure to the plate material; a pressure adjusting assembly is a static manual adjusting structure and comprises a carrier plate, a frame rod, a sleeve, a screw rod, and a pressure plate, the carrier plate is horizontally arranged above the frame; the frame rod is vertically arranged around the lower part of the carrier plate and is connected with the frame; the sleeve is vertically downward arranged along the central position of the upper part of the carrier plate; the screw rod is arranged inside the sleeve and is meshed and connected with the sleeve; the pressure plate is arranged at the lower end of the screw rod and is used to abut against the upper surface of the frame plate to apply downward pressure to the frame plate so that the relative distance between the first pressing roller and the supporting plate is constant during the straightening process of the plate material; the pressure plate is vertically lifted and lowered together with the screw rod by rotating a hand wheel to adjust the straightening active distance between the first pressing roller and the supporting roller. Or the distance adjusting pressure piece is a dynamic automatic adjusting structure, the pressure adjusting assembly comprises a carrier plate and a frame rod, the carrier plate is horizontally arranged above the frame, and frame rods are vertically arranged around the lower part of the carrier plate and are connected with the frame. The pressure adjusting assembly further comprises a first cross plate, a first guide rod, a first sliding rod, and a first spring, first guide rods are vertically upward arranged around the upper part of the carrier plate and serve as guides, a first cross plate is transversely arranged between two first guide rods and serves as a support, first sliding rods are symmetrically and vertically arranged on the upper part of the first cross plate, penetrate the first cross plate and the carrier plate, and are connected with the frame plate, a first spring is arranged outside the first sliding rod and abuts against one end of the first cross plate, the other end of the first spring abuts against a nut arranged on the upper part of the first sliding rod, and the first spring enables the first cross plate to have the ability of elastic buffering. Plate pressing assemblies for preventing the plate material from being warped are arranged at both ends of the carrier plate. The plate pressing assembly comprises a second guide rod, a second cross plate, and a second sliding rod, second guide rods are vertically upward arranged around the upper part of the carrier plate and serve as guides and penetrate the carrier plate, a second cross plate is transversely arranged between two second guide rods and serves as a support, second sliding rods are symmetrically and vertically arranged on the upper part of the second cross plate, penetrate the second cross plate, and are connected with the carrier plate, and the second sliding rods can freely slide in the second cross plate and the carrier plate and are connected with the carrier plate. The plate pressing assembly further comprises a second spring, the second spring is arranged outside the second sliding rod and abuts against one end of the second cross plate, and the other end of the second spring abuts against a nut arranged on the upper part of the second sliding rod. The number of the second springs is two and the second springs are spliced, and the second springs abut against each other through a gasket sleeved with the second sliding rod. The plate pressing assembly further comprises a sliding block and a second pressing roller, the lower end of the second guide rod is arranged with the sliding block which abuts against the second guide rod and is slidingly connected with the frame rod, and the sliding block is transversely arranged with the second pressing roller which is connected with the sliding block through a bearing. 2. The straightening apparatus according to claim 1, wherein: 3. The straightening device for a sheet material according to claim 2, characterized in that: 4. The straightening device according to any one of claims 1 to 3, characterized in that: 5. The straightening device for a sheet material according to claim 4, characterized in that: 6. The straightening device for a sheet material according to claim 5, characterized in that: 7. The straightening device for a sheet material according to claim 6, characterized in that: 8. The straightening apparatus according to claim 5, wherein: 9. The straightening apparatus according to claim 5, wherein: The pressing plate assembly further comprises a tray, a shaft and a handle, the upper part of the frame plate is arranged with a horizontally rotatable tray below the second transverse plate, the tray is connected with the frame plate through a shaft arranged vertically at the center of the tray, and the tray is outwardly extended on one side with a handle screwed therewith.
10. The straightening device for a sheet material according to claim 9, characterized in that: A round-arc convex edge with a gradually changing height is formed at the top edge position of the tray, and convex knobs for abutting against the convex edge are symmetrically and spacedly arranged below the second transverse plate.