Roller straightener work roll change bracket

Abstract

The present application relates to the roll straightener work roll change bracket, belongs to the roll straightener technical field, including the upper roller box adjusting device and the lower roller box adjusting device which are arranged in the upper and lower, the upper roller box adjusting device includes the height adjustable upper movable bracket, the upper movable bracket is installed with the intermediate coupling which is matched with the upper work roll number of the straightener, and both ends are provided with the upper roller box Z direction positioning structure, the lower roller box adjusting device includes the height self -adaptation adjusting lower movable bracket, the lower movable bracket is installed with the intermediate coupling which is matched with the lower work roll number of the straightener, and both ends are provided with the lower roller box Z direction positioning structure, the present application is respectively through the upper roller box Z direction positioning structure and the lower roller box Z direction positioning structure and realizes the butt joint with the upper roller box and the lower roller box, realizes the butt joint of work roll and intermediate coupling through the speed difference movement of the non-rotation of work roll and the rotation of intermediate coupling, and then realizes the quick replacement of roller box.

Description

Technical Field

[0001] This invention belongs to the technical field of roller straighteners and relates to a roller changer bracket for a roller straightener. Background Technology

[0002] Roller straighteners are key equipment in the sheet and strip straightening process, widely used in sheet and strip heat treatment units, cross-cutting or slitting units, and play a decisive role in the final sheet and strip shape quality. The work rolls of the straightener are structurally divided into two rows: an upper roll box and a lower roll box. During operation, the work rolls in the roll box directly contact the sheet and strip. The straightening torque required to straighten the sheet and strip is usually transmitted to the work rolls via a coupling connected to a gear distribution box, which is driven by a motor. In engineering applications, the connection between each work roll in the roll box and the coupling is usually a flat key or spline. For high-strength sheet and strip straighteners, due to the need for a large straightening torque, a spline connection is typically used between the work rolls and the coupling. Furthermore, after a period of use, the work rolls in the straightener roll box need to be replaced due to wear. To improve production efficiency, the replacement of the work rolls needs to be completed in the shortest possible time.

[0003] When replacing the roller boxes in a multi-roll straightener, the difference in diameter between the support rollers and working rollers in the new and old roller boxes causes a vertical height difference between the center of the working rollers and the center of the spline sleeve on the coupling. Height difference compensation must be considered during roller replacement. Even if the straightener has a height difference compensation mechanism or method in its structure, the phase difference between the teeth of the working roller spline shaft and the spline sleeve still exists, preventing the working roller spline shaft from smoothly inserting into the spline sleeve. Therefore, to successfully replace the old and new roller boxes, the following three conditions must be met:

[0004] 1. Ensure that the centerline of the work roller is aligned with the centerline of the spline sleeve on the coupling in the height direction (defined as the Z-direction, see...). Figure 1 (Above to the middle)

[0005] 2. Ensure that the centerline of the work roll and the centerline of the spline sleeve on the coupling are aligned in the front-to-back direction (i.e., the direction of steel plate movement, defined as the X-axis; the axis of the work roll is defined as the Y-axis). See [link to relevant documentation]. Figure 1 (to China)

[0006] 3. Ensure that the teeth of the spline shaft and the spline sleeve are in phase, that is, the spline shaft can be correctly inserted into the spline sleeve.

[0007] Many straightening machines lack adjustment mechanisms or methods that meet the above three conditions, requiring manual alignment, which is time-consuming and labor-intensive. Some only have simple height and front-to-back alignment functions, resulting in the need to align the center of the working roller spline shaft with the coupling spline sleeve and the phase of the spline shaft gear teeth with the spline sleeve gear teeth when replacing old and new roller boxes. The operation is mainly manual, and the roller replacement operation takes as long as 8 to 16 hours. Even if some straightening machines are equipped with electric or hydraulic height adjustment mechanisms, they are complex in structure, have low reliability, and their effect is not obvious. Moreover, the more rollers there are, the more time-consuming and labor-intensive it becomes, which seriously affects production efficiency and production rhythm. Especially for continuous heat treatment production lines, the heating furnaces in subsequent processes consume energy for heat preservation, and the auxiliary systems of the production line also need to be kept running, which further aggravates energy consumption and increases the overall production and operating costs of enterprises.

[0008] Therefore, it is essential to develop a new roller straightener roller changing mechanism that can quickly replace old roller boxes with new ones, reduce roller changing time, thereby improving the unit's operating efficiency and reducing the unit's production and operating costs. Summary of the Invention

[0009] In view of this, the purpose of the present invention is to provide a roller changer bracket for a roller straightener to enable rapid replacement of the roller box.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] The roller straightener's work roll changing bracket includes an upper roller box adjusting device and a lower roller box adjusting device located on the drive side of the straightener and arranged vertically. The upper roller box adjusting device includes an upper fixed bracket connected to the straightener and an upper movable bracket located below the upper fixed bracket. An intermediate coupling matching the number of upper work rolls of the straightener is installed on the upper movable bracket. The upper movable bracket is connected to a lifting device on the upper fixed bracket to achieve height adjustment, and is docked with the upper roller box via upper roller box Z-axis positioning structures located at both ends of the upper movable bracket. The upper roller box Z-axis positioning structure includes an upper positioning support fixedly connected to the upper movable bracket, and the upper positioning support has an upper positioning pin guide hole matching the upper positioning pin located at the front end of the upper roller box. The lower roller box adjusting device includes a lower fixed bracket and a lower movable bracket located above the lower fixed bracket. An intermediate coupling matching the number of lower work rolls of the straightener is installed on the lower movable bracket. The frame is connected to a height-adaptive adjustment structure mounted on the lower fixed bracket to achieve adaptive adjustment of the height position, and is docked with the lower roller box via a lower roller box Z-axis positioning structure mounted at both ends of the lower movable bracket. The lower roller box Z-axis positioning structure includes a lower positioning support fixedly connected to the lower movable bracket, and the lower positioning support has a lower positioning pin guide hole that matches the lower positioning pin mounted at the front end of the lower roller box. The intermediate coupling includes a spline sleeve, one end of which can match the spline shaft at the end of the straightener's working roller shaft, and the other end is connected to a matching spline shaft. The other end of the spline shaft can be connected to the main drive system of the straightener. A fixed ring is provided on the spline shaft, and at least two tie rods are slidably connected to the fixed ring and parallel to the spline shaft. The tie rods are fixedly connected to the spline sleeve. A first elastic element is provided between the fixed ring and the spline sleeve, and the first elastic element is sleeved on the spline shaft. The first elastic element can be a spring. The lifting device can be hydraulically driven or motor driven.

[0012] Optionally, the lifting device includes an upper guide rod arranged vertically at both ends of the upper movable bracket. The lower end of the upper guide rod is slidably connected to and extends out of the upper movable bracket guide hole opened on the upper movable bracket. The lower end of the extended end is provided with a first elastic element and a first limiting structure located below the first elastic element to prevent it from dislodging from the upper movable bracket guide hole. The upper end of the upper guide rod passes through the upper fixed bracket guide hole opened on the upper fixed bracket and is connected to a linear drive mechanism installed on the upper fixed bracket. The second elastic element is a disc spring.

[0013] Optionally, an upper limit plate is provided between the upper fixed bracket and the upper movable bracket, which is fixedly connected to the two upper guide rods to limit the upper limit position of the upper guide rods.

[0014] Optionally, an upper movable bracket anti-tilting structure is provided between the upper limit plate and the upper fixed bracket. The upper movable bracket anti-tilting structure includes two sets of conical pin and conical sleeve positioning structures distributed on both sides of the line connecting the two upper guide rods. The conical pin and conical sleeve positioning structure includes a positioning conical pin that extends from the upper fixed bracket onto the upper movable bracket and a positioning conical sleeve that matches the positioning conical pin on the upper fixed bracket.

[0015] Optionally, the positioning cone sleeve is detachably connected to the upper fixed bracket, and the positioning cone pin is detachably connected to the upper movable bracket.

[0016] Optionally, the linear drive mechanism is a hydraulic cylinder.

[0017] Optionally, the height adaptive adjustment structure includes a lower guide rod arranged vertically at both ends of the lower movable bracket. The upper end of the lower guide rod is slidably connected to and extends out of the lower movable bracket guide hole opened on the lower movable bracket. The upper extended end is provided with a second limiting structure to prevent it from dislodging from the lower movable bracket guide hole. The lower end of the lower guide rod is fixedly connected to a lower fixed bracket located below the lower movable bracket. A second elastic element, which is a disc spring, is provided between the lower fixed bracket and the lower movable bracket.

[0018] Optionally, it also includes an X-direction pre-positioning structure, which includes an outwardly convex side guide liner located on the inner side of the straightener frame corresponding to the lower roller box position, and a guide liner on the lower roller box that matches the side guide liner.

[0019] Optionally, upper roller bearings protruding from the upper positioning pin guide hole are provided on the upper and lower sides of the upper positioning pin guide hole to form rolling friction with the upper positioning pin, and lower roller bearings protruding from the lower positioning pin guide hole are provided on the upper and lower sides of the lower positioning pin guide hole to form rolling friction with the lower positioning pin.

[0020] Optionally, the splined shaft of the intermediate coupling is connected to the splined sleeve of the ball gear coupling, and the ball gear coupling is connected to the gear distribution box of the straightening machine.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The upper roller box and the lower roller box are positioned in the Z-direction by the upper roller box and the lower roller box respectively. The working roller is connected to the intermediate coupling by the speed difference motion of the intermediate coupling while the working roller does not rotate, thereby realizing the quick replacement of the roller box.

[0023] 2. By setting an anti-tilting structure for the upper movable bracket, the upper movable bracket can be kept in a horizontal state, thereby keeping the intermediate coupling in a horizontal state, which solves the problem of difficulty in connecting the work roller and the intermediate coupling due to the tilt of the intermediate coupling.

[0024] 3. By setting up an X-axis pre-positioning structure, the positioning time of the roller box in the X-axis is shortened, further improving the roller changing efficiency.

[0025] 4. The upper and lower movable brackets are adaptively fine-tuned in the height direction through disc springs, which makes the structure simple, stable and reliable.

[0026] 5. It enables rapid positioning and docking of the working roll and the intermediate coupling, thereby achieving rapid replacement of the roll box, significantly improving the roll changing efficiency of the straightener, and reducing the production and operating costs of the enterprise.

[0027] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 This is a schematic diagram of the working roll changing bracket of the roller straightener of the present invention;

[0030] Figure 2 for Figure 1 The left view;

[0031] Figure 3 This is a schematic diagram of the intermediate coupling.

[0032] Figure 4 This is a structural diagram of the anti-tilting structure of the upper movable bracket;

[0033] Figure 5 This is a diagram showing the layout of the anti-tilting structure of the upper movable bracket in the horizontal plane.

[0034] Figure 6 This is a schematic diagram of the upper and lower roller boxes.

[0035] Figure 7 This is a schematic diagram of the upper and lower positioning devices.

[0036] Attached reference numerals: Upper bracket 1, Lower bracket 2, Straightening machine frame 3, Intermediate coupling 4, Upper movable bracket anti-tilting structure 5, Upper roller box 6, Lower roller box 7, Ball gear coupling 8, Upper roller box Z-axis positioning structure 9, Lower roller box Z-axis positioning structure 10, Upper fixed bracket 1-1, Upper limit plate 1-2, Upper movable bracket 1-3, Upper guide rod 1-4, Lifting hydraulic cylinder 1-5, Connecting rod 1-6, Second elastic element 1-7, Locking nut 1-8, Pressure plate 1-9, Connecting bolt 1-10, Lower fixed bracket 2-1, Lower movable bracket 2-2, Lower... Guide rod 2-3, second elastic element 2-4, side guide liner 3-1, lower crossbeam 3-2, spline sleeve 4-1, first elastic element 4-2, fixing ring 4-3, pull rod 4-4, spline shaft 4-5, positioning cone sleeve 5-1, positioning cone pin 5-2, upper roller box base 6-1, upper working roller 6-2, upper positioning pin 6-3, lower roller box base 7-1, lower working roller 7-2, lower positioning pin 7-3, guide liner 7-4, upper positioning support 9-1, upper roller bearing 9-2, lower positioning support 10-1, lower roller bearing 10-2. Detailed Implementation

[0037] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand 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, and various details in this specification can 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 illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0039] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] Please see Figures 1-7 A roller straightener working roller changing bracket includes an upper bracket 1, a lower bracket 2, a straightener frame 3, an intermediate coupling 4, an upper movable bracket anti-tilting structure 5, an upper roller box 6, a lower roller box 7, a ball gear coupling 8, an upper roller box Z-direction positioning structure 9, and a lower roller box Z-direction positioning structure 10.

[0041] Figure 1 This is a schematic diagram of the work roll changing bracket for a roller straightener according to the present invention. For ease of explanation, the diagram uses a typical 15-roll straightener as an example. This structure is not limited to straighteners with 15 rolls; it is also applicable to roller straighteners with other roll numbers, such as conventional roller straighteners with 5 to 21 rolls, which can also use this method to achieve rapid roll changing. Figure 1 The straightened steel plate 11 moves forward along the X direction (from left to right in the figure). For ease of description, the present invention defines a spatial coordinate system for the roller changing bracket, as follows: Figure 1 As shown, the X direction is the running direction of the straightened steel plate, the Y direction is the direction of the center line of the work roll, and the Z direction is the height direction.

[0042] The upper bracket 1 mainly includes an upper fixed bracket 1-1, an upper limit plate 1-2, an upper movable bracket 1-3, an upper guide rod 1-4, a lifting hydraulic cylinder 1-5, a connecting rod 1-6, a second elastic element 1-7, a locking nut 1-8, a pressure plate 1-9, and connecting bolts 1-10, etc. The second elastic element 1-7 is a disc spring.

[0043] The upper fixed bracket 1-1 is a welded steel structure, which is bolted to the transmission side of the straightening machine frame 3 to support the entire upper bracket 1 and to install the lifting hydraulic cylinder 1-5. The upper fixed bracket 1-1 is also provided with a through hole through which the upper guide rod 1-4 passes and a hole for installing the positioning sleeve 5-1.

[0044] The upper limit plate 1-2 is also provided with through holes through which the guide rods 1-4 pass. The two upper guide rods 1-4 arranged on the left and right are rigidly fixed together by the locking nut 1-8 to form a whole. The lifting action is realized by the lifting hydraulic cylinder 1-5 through the connecting rod 1-6. The positioning hole for installing the positioning cone pin 5-2 is also arranged on it.

[0045] The upper movable bracket 1-3 is used to install and fix the intermediate coupling 4, so that the intermediate coupling 4 and the upper movable bracket 1-3 form a whole and move up and down synchronously with the upper movable bracket 1-3. Guide holes for the upper guide rod 1-4 are provided at both ends of the upper movable bracket 1-3, allowing it to slide relative to the upper guide rod 1-4. The upper movable bracket 1-3 has seven through holes for installing the intermediate coupling 4, allowing the intermediate coupling 4 to move synchronously with the upper movable bracket 1-3 during roller changing or working conditions.

[0046] The lower end of the upper guide rod 1-4 passes through the guide hole on the upper movable bracket 1-3, and a disc spring assembly 1-7 is set at the lower end. A pressure plate 1-9 and a connecting bolt 1-10 are also set at the bottom of the disc spring assembly 1-7. In this way, the weight of the upper movable bracket 1-3 and the intermediate coupling 4 is transmitted to the upper guide rod 1-4 through the disc spring assembly 1-7, and further transmitted to the lifting hydraulic cylinder 1-5 through the connecting rod 1-6.

[0047] Lifting hydraulic cylinders 1-5 are mounted on the upper fixed bracket 1-1, one on each side. During roller changes, they lift the upper limit plate 1-2 upwards, pressing it firmly against the lower surface of the upper fixed bracket 1-1, and are correspondingly fixed above the upper guide rods 1-4 on both sides. The lifting hydraulic cylinders 1-5 and the upper guide rods 1-4 are connected by connecting rods 1-6, one on each side. During roller changes, the lifting hydraulic cylinder 1-5, through connecting rod 1-6, drives the upper limit plate 1-2 and the upper guide rods 1-4 upwards, causing the upper limit plate 1-2 to press upwards against the bottom of the upper fixed bracket 1-1, thereby fixing the upper guide rods 1-4.

[0048] Disc spring assembly 1-7 is mounted below upper guide rod 1-4 to support the weight of upper movable bracket 1-3 and all intermediate couplings 4, and to adapt the upper movable bracket 1-3 to self-adjustment when its position changes in the height direction.

[0049] The lower bracket 2 mainly includes a lower fixed bracket 2-1, a lower movable bracket 2-2, a lower guide rod 2-3, a second elastic element 2-4, etc. The second elastic element 2-4 is a disc spring.

[0050] Similarly, the lower fixed bracket 2-1 is a welded steel structure, installed on the straightening machine frame 3, and is used to support the entire lower bracket 2. Through holes are provided on both sides of the lower fixed bracket 2-1 for the lower guide rod 2-3 to pass through. The lower fixed bracket 2-1 and the lower guide rod 2-3 are rigidly connected together.

[0051] The lower movable bracket 2-2 is also provided with guide holes through which the lower guide rod 2-3 passes. The two sides of the lower movable bracket 2-2 are fitted onto the lower guide rod 2-3 and can slide freely up and down relative to the lower guide rod 2-3. The lower movable bracket 2-2 is provided with through holes for installing the intermediate coupling 4. In this example, there are 8 holes. In the roller changing state or working state, the intermediate coupling 4 can move up and down synchronously with the lower movable bracket 2-2.

[0052] Two lower guide rods 2-3 are provided, with their lower ends respectively installed in the guide holes located at both ends of the lower fixed bracket 2-1, and their upper parts connected to the corresponding through holes located at both ends of the lower movable bracket 2-2. The lower movable bracket 2-2 can slide up and down relative to the lower guide rods 2-3.

[0053] The second elastic element 2-4 is fitted onto the lower guide rod 2-3 and installed between the lower fixed bracket 2-1 and the lower movable bracket 2-2. It is used to bear the weight of the lower movable bracket 2-2 and all intermediate couplings 4, and to adapt the lower movable bracket 2-2 to self-adjustment when its position changes in the height direction.

[0054] The side guide plate 3-1 on the straightener frame 3 is used to control the X-axis alignment of the upper and lower roller boxes after they enter the frame 3, thus determining the X-axis position of all work roller centers. The lower crossbeam 3-2 inside the frame serves as both the load-bearing surface of the lower roller box during straightening and the track surface for the upper and lower roller boxes to enter the frame. The side guide plate 3-1 is located inside the straightener frame 3, corresponding to the position of the lower roller box 7, and forms an X-axis pre-positioning structure with the guide plate 7-4, which is installed on the lower roller box 7 and matches the side guide plate 3-1.

[0055] The guide plates 7-4 arranged symmetrically on both sides of the lower roller box 7 are used to cooperate with the side guide plates 3-1 arranged symmetrically after the upper and lower roller boxes enter the straightener frame 3 to ensure that the center of the spline shaft at the end of the working roller is aligned with the center of the spline sleeve 4-1 in the X direction. The side guide plates 3-1 are located inside the straightener frame 3 corresponding to the position of the lower roller box 7.

[0056] Figure 3 The structure of the intermediate coupling 4 is shown. The intermediate coupling 4 mainly includes a spline sleeve 4-1, a first elastic element 4-2, a retaining ring 4-3, a tie rod 4-4, and a spline shaft 4-5. The first elastic element 4-2 is a spring. The intermediate coupling 4 is installed in the corresponding holes of the upper movable bracket 1-3 and the lower movable bracket 2-2. When the outer side of the spline sleeve 4-1 is subjected to axial compression, the first elastic element 4-2 will be compressed, and the spline sleeve 4-1 will move along the compression direction of the first elastic element 4-2. One end of the intermediate coupling 4 is connected to the gear distribution box via a ball-tooth coupling 8, and the other end is connected to the spline shaft 4-5 at the end of the work roll shaft. During roll changing operations, the main drive of the straightener continues to rotate, and the spline sleeve 4-1 on the intermediate coupling 4 also continues to rotate accordingly, while all the work rolls remain stationary. The speed difference between the two and the pressure generated by the first elastic element 4-2 on the intermediate coupling 4 during the pressing process ensure that the two are correctly engaged. In this example, seven intermediate couplings 4 are installed on the upper movable bracket 1-3 and eight intermediate couplings 4 are installed on the lower movable bracket 2-2, for a total of 15 couplings, which can move up and down synchronously with the upper movable bracket 1-3 and the lower movable bracket 2-2 respectively.

[0057] Figure 5The structure of the upper movable bracket anti-tilting structure 5 is shown. The upper movable bracket anti-tilting structure 5 includes two sets of tapered pin and tapered sleeve positioning structures distributed on both sides of the line connecting the two upper guide rods, consisting of a positioning tapered sleeve 5-1 and a positioning tapered pin 5-2. The positioning tapered sleeve 5-1 is installed on the upper fixed bracket 1-1, and the positioning tapered pin 5-2 is installed on the upper surface of the upper movable bracket 1-3. By adopting a staggered arrangement, the upper limit plate 1-2 can be positioned in the X and Y directions in the horizontal plane, thereby correspondingly positioning the upper guide rod 1-4, the upper movable bracket 1-3, and the intermediate coupling 4 in the X and Y directions.

[0058] Figure 6 The structure of the upper and lower roller boxes is shown. The upper roller box 6 includes an upper roller box base 6-1, an upper working roller 6-2, and an upper positioning pin 6-3. The lower roller box 7 includes a lower roller box base 7-1, a lower working roller 7-2, a lower positioning pin 7-3, and a guide liner 7-4. The upper positioning pins 6-3 and lower positioning pins 7-3 are respectively disposed on the upper roller box 6 and the lower roller box 7, two on each side, symmetrically arranged along the X-direction and near the drive side. The upper positioning pins 6-3, symmetrically arranged on the drive side of the upper roller box 6, are used to insert into the roller bearings of the upper positioning device 9 to ensure that the center of the intermediate coupling 4 mounted on the upper movable bracket 1-3 is aligned with the center of all the working rollers in the upper roller box 6 in the Z-direction. The lower positioning pins 7-3, symmetrically arranged on the drive side of the lower roller box 7, are used to insert into the roller bearings of the lower positioning device 10 to ensure that the center of the intermediate coupling 4 mounted on the lower movable bracket 2-2 is aligned with the center of all the working rollers in the lower roller box 7 in the Z-direction. Figure 6 The intermediate dimension H is the total height when the upper and lower roller boxes are stacked together, and its value is fixed. Dimension H1 is the height from the center of the working roller in the upper roller box to the horizontal center line of the upper positioning pin, and dimension H2 is the height from the center of the working roller in the lower roller box to the horizontal center line of the lower positioning pin. The sizes of H1 and H2 are always fixed. After the working roller, intermediate roller (set in the 6-roll system) and support roller have been refurbished, they can be reassembled and used after being refurbished. However, since their roller diameter has changed, the assembly dimensions H1 and H2 have become smaller. In order to keep dimensions H1 and H2 constant, the corresponding changes in dimensions can be ensured by adjusting dimensions M1 and M2. That is, by adjusting the position of the upper positioning pin 6-3 and the lower positioning pin 7-3, the position dimensions H1 and H2 are kept constant, so that the center of the spline shaft on the working roller and the center of the spline sleeve 4-1 are always aligned in the Z direction when changing rollers. The guide plates 7-4, which are symmetrically arranged on both sides of the lower roller box 7, are used to cooperate with the side guide plates 3-1, which are also symmetrically arranged, after the upper and lower roller boxes enter the straightener frame 3, to ensure that the center of the spline shaft at the end of the working roller is aligned with the center of the spline sleeve 4-1 in the X direction.

[0059] The ball-tooth coupling 8 is used to transmit the straightening torque to the corresponding connected upper work roll 6-2 or lower work roll 7-2 through the intermediate coupling 4.

[0060] Figure 7 The diagram shows the structural schematics of the upper roller box Z-axis positioning structure 9 and the lower roller box Z-axis positioning structure 10. The upper roller box Z-axis positioning structure 9 includes an upper positioning support 9-1 and an upper roller bearing 9-2. The lower roller box Z-axis positioning structure 10 includes a lower positioning support 10-1 and a lower roller bearing 10-2. In the diagram, dimension H1' is the height value from the symmetrical center line of the two upper roller bearings 9-2 in the upper roller box Z-axis positioning structure 9 to the axis of the upper row intermediate coupling 4, and H1' = H1. Dimension H2' is the height value from the symmetrical center line of the two lower roller bearings 10-2 in the lower roller box Z-axis positioning structure 10 to the axis of the lower row intermediate coupling 4, and H2' = H2. This ensures that the center lines of all working rollers and the center lines of all intermediate couplings 4 are aligned in the Z-axis when changing rollers.

[0061] The upper roller bearing 9-2 in the upper roller box Z-direction positioning structure 9 is mounted on the upper positioning support 9-1, one on the top and one on the bottom. The upper positioning support 9-1 is rigidly connected to the upper movable bracket 1-3 by bolts. The upper positioning pin 6-3 is inserted from between the two upper roller bearings 9-2. When changing rollers, the center of all the upper working rollers 6-2 in the upper roller box 6 can be aligned with the center of the spline sleeve 4-1 on the intermediate coupling 4 in the height direction (Z direction), which facilitates the insertion of the spline shaft of the transmission end of the upper working roller 6-2 into the spline sleeve 4-1.

[0062] The lower roller bearing 10-2 in the Z-direction positioning structure 10 of the lower roller box is installed on the lower positioning support 10-1, one on the top and one on the bottom. The lower positioning pin 7-3 is inserted between the two lower roller bearings 10-2. The lower positioning support 10-1 and the lower intermediate coupling bracket 2-2 are rigidly connected together by bolts. When changing rollers, the center of all the lower working rollers 7-2 in the lower roller box 7 can be aligned with the center of the spline sleeve 4-1 on the intermediate coupling 4 in the height direction (Z direction), which facilitates the insertion of the spline shaft of the transmission end of the lower working roller 7-2 into the spline sleeve 4-1.

[0063] Before starting the roller changing operation, the lifting hydraulic cylinder 1-5 is first retracted to its highest position. Then, through the connecting rod 1-6 and the upper guide rod 1-4, the upper limit plate 1-2, the upper movable bracket 1-3, and the intermediate coupling 4 are raised. After being raised to the position, the upper limit plate 1-2 is positioned in the X and Y directions by aligning the positioning cone sleeve 5-1 and positioning cone pin 5-2 of the upper movable bracket anti-tilting structure 5. Correspondingly, the ground guide rod 1-4, the upper movable bracket 1-3, and the intermediate coupling 4 are also positioned in the X and Y directions.

[0064] Pulling out the old roller box:

[0065] Using the roller changing trolley and the lower crossbeam 3-2 inside the frame, pull out the upper roller box 6 and lower roller box 7 after the roller diameter is worn to the appropriate level, and then lift them away by a crane.

[0066] Pushing in a new roller box:

[0067] After correctly hoisting the new roller box onto the roller changing track and connecting it to the roller changing trolley, the main drive of the straightener is then turned on and kept rotating continuously. The roller changing trolley then pushes the new roller box into the straightener frame 3 and moves it horizontally on the lower crossbeam 3-2 located within the frame 3. During this process, the side guide plates 3-1 and the lower roller box guide plates 7-4 on both sides of the frame 3 ensure that the centers of all upper working rollers 6-2 and lower working rollers 7-2 are aligned with the center of their respective spline sleeves 4-1 along the X direction. The upper roller boxes 6 and lower roller boxes 7 are further pushed into the frame. When the upper positioning pins 6-3 and lower positioning pins 7-3 are inserted into the upper roller bearings 9-2 and 10-2 respectively and are in place, the centers of all upper working rollers 6-2 and lower working rollers 7-2 are aligned with the center of the spline sleeves 4-1 in the height direction (Z direction).

[0068] Next, the roller changing trolley pushes the upper roller box 6 and the lower roller box 7 further into the frame. When the splined ends of all the upper working rollers 6-2 and lower working rollers 7-2 begin to contact the splined sleeve 4-1, if the teeth of the two are not aligned on the circumference, i.e., there is a phase difference, the splined sleeve 4-1 will move to the right due to the pressure from the splined ends of the upper working rollers 6-2 and lower working rollers 7-2 (see...). Figure 3 Because the intermediate coupling 4 is equipped with a first elastic element 4-2, during the process of the spline sleeve 4-1 retracting to the right, the first elastic element 4-2 will be gradually compressed, and the spline shafts at the ends of the upper working roller 6-2 and the lower working roller 7-2 and the spline sleeve 4-1 will be pressed tightly together. During the roller changing process, the straightener working rollers 6-2 and 7-2 remain stationary, while the spline sleeve 4-1 continues to rotate. When the spline sleeve 4-1 rotates to a certain angle, the gear teeth of the spline shafts at the ends of the upper working roller 6-2 and the lower working roller 7-2 are exactly in phase with those of the spline sleeve 4-1. Then, due to the leftward pressure of the first elastic element 4-2, the spline sleeve 4-1 will be fitted onto the spline shaft at the end of the upper working roller 6-2 or the lower working roller 7-2 (see...). Figure 3 During the entire roll changing process, each work roll performs the same action, thereby ensuring that the splined shafts at the ends of all upper work rolls 6-2 and lower work rolls 7-2 are correctly fitted into the splined sleeves 4-1 of the intermediate coupling 4, completing the roll changing operation.

[0069] This invention, through the installation of a positioning structure on the straightener to control the center alignment of the splined shaft 4-5 at the end of the work roll shaft with the splined sleeve 4-1 on the intermediate coupling 4 in the height direction (Z direction), a center alignment guide liner 7-4 on the lower roller box 7 along the front-to-back direction (X direction, i.e., along the running direction of the steel plate), side guide liners 3-1 symmetrically arranged on both sides inside the frame, and auxiliary alignment of the splined shaft gear teeth on the work roll with the splined sleeve gear teeth on the intermediate coupling 4, as well as a spring clamping mechanism, and by utilizing the speed difference between the work roll not rotating and the intermediate coupling rotating, the work roll can be quickly and accurately fitted into the intermediate coupling, realizing the rapid replacement of the old and new roller boxes, saving time and labor, greatly improving the roller changing efficiency of the straightener, and thus reducing the production and operating costs of enterprises.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A roller changer bracket for a roller straightener, characterized in that: It includes an upper roller box adjustment device and a lower roller box adjustment device located on the drive side of the straightener and arranged vertically. The upper roller box adjustment device includes an upper fixed bracket (1-1) connected to the straightener and an upper movable bracket (1-3) located below the upper fixed bracket (1-1). An intermediate coupling (4) matching the number of upper working rollers (6-2) of the straightener is installed on the upper movable bracket (1-3). The upper movable bracket (1-3) is connected to a lifting device set on the upper fixed bracket (1-1) to realize the adjustment of the height position, and is docked with the upper roller box (6) through the upper roller box Z-direction positioning structure (9) set at both ends of the upper movable bracket (1-3). The upper roller box Z-direction positioning structure (9) includes an upper positioning support (9-1) fixedly connected to the upper movable bracket (1-3). The upper positioning support (9-1) has an upper positioning pin guide hole matching the upper positioning pin (6-3) set at the front end of the upper roller box (6). The lower roller box adjustment device includes a lower fixed bracket (2-1) and a lower movable bracket (2-2) located above the lower fixed bracket (2-1). An intermediate coupling (4) matching the number of lower working rollers (7-2) of the straightener is installed on the lower movable bracket (2-2). The lower movable bracket (2-2) is connected to the height adaptive adjustment structure set on the lower fixed bracket (2-1) to realize the adaptive adjustment of the height position. It is connected to the lower roller box (7) through the lower roller box Z-direction positioning structure (10) set at both ends of the lower movable bracket (2-2). The lower roller box Z-direction positioning structure (10) includes a lower positioning support (10-1) fixedly connected to the lower movable bracket (2-2). The lower positioning support (10-1) has a lower positioning pin guide hole matching the lower positioning pin (7-3) set at the front end of the lower roller box (7). The intermediate coupling (4) includes a spline sleeve (4-1). One end of the spline sleeve (4-1) can be matched with the spline shaft at the end of the working roller of the straightener, and the other end is connected to a matching spline shaft (4-5). The other end of the spline shaft (4-5) can be connected to the main drive system of the straightener. A fixing ring (4-3) is provided on the spline shaft (4-5). At least two tie rods (4-4) are slidably connected to the fixing ring (4-3) and parallel to the spline shaft (4-5). The tie rods (4-4) are fixedly connected to the spline sleeve (4-1). A first elastic element (4-2) is provided between the fixing ring (4-3) and the spline sleeve (4-1). The first elastic element (4-2) is sleeved on the spline shaft (4-5).

2. The roller changing bracket for the roller straightener according to claim 1, characterized in that: The lifting device includes an upper guide rod (1-4) arranged vertically at both ends of the upper movable bracket (1-3). The lower end of the upper guide rod (1-4) is slidably connected to the upper movable bracket guide hole opened on the upper movable bracket (1-3) and extends out of the upper movable bracket guide hole. The lower end of the extended end is provided with a second elastic element (1-7) and a first limiting structure (1-9) located below the second elastic element (1-7) to prevent it from falling out of the upper movable bracket guide hole. The upper end of the upper guide rod (1-4) passes through the upper fixed bracket guide hole opened on the upper fixed bracket (1-1) and is connected to a linear drive mechanism installed on the upper fixed bracket (1-1). The second elastic element (1-7) is a disc spring.

3. The roller changer bracket for the roller straightener according to claim 2, characterized in that: An upper limit plate (1-2) is provided between the upper fixed bracket (1-1) and the upper movable bracket (1-3) and is fixedly connected to the two upper guide rods (1-4) to limit the upper limit position of the upper guide rods (1-4).

4. The roller changer bracket for the roller straightener according to claim 3, characterized in that: An upper movable bracket anti-tilting structure (5) is provided between the upper limit plate (1-2) and the upper fixed bracket (1-1). The upper movable bracket anti-tilting structure (5) includes two sets of conical pin and conical sleeve positioning structures distributed on both sides of the line connecting the two upper guide rods (1-4). The conical pin and conical sleeve positioning structure includes a positioning conical pin (5-2) set on the upper movable bracket (1-3) and extending to the upper fixed bracket (1-1) and a positioning conical sleeve (5-1) set on the upper fixed bracket (1-1) and matching the positioning conical pin (5-2).

5. The roller changing bracket for the work roll of the roller straightener according to claim 4, characterized in that: The positioning cone sleeve (5-1) is detachably connected to the upper fixed bracket (1-1), and the positioning cone pin (5-2) is detachably connected to the upper movable bracket (1-3).

6. The roller changer bracket for the roller straightener according to claim 2, characterized in that: The linear drive mechanism is a hydraulic cylinder.

7. The roller changer bracket for the roller straightener according to claim 1, characterized in that: The height adaptive adjustment structure includes a lower guide rod (2-3) arranged vertically at both ends of the lower movable bracket (2-2). The upper end of the lower guide rod (2-3) is slidably connected to the lower movable bracket guide hole opened on the lower movable bracket (2-2) and extends out of the lower movable bracket guide hole. The upper end of the extended end is provided with a second limiting structure to prevent it from falling out of the lower movable bracket guide hole. The lower end of the lower guide rod (2-3) is fixedly connected to the lower fixed bracket (2-1) located below the lower movable bracket (2-2). A second elastic element (2-4) is provided between the lower fixed bracket (2-1) and the lower movable bracket (2-2). The second elastic element (2-4) is a disc spring.

8. The roller changer bracket for the roller straightener according to claim 1, characterized in that: It also includes an X-direction prepositioning structure, which includes a convex side guide liner (3-1) located on the inner side of the straightener frame (3) corresponding to the lower roller box (7) and a guide liner (7-4) set on the lower roller box (7) to match the side guide liner (3-1).

9. The roller changer bracket for the roller straightener according to claim 1, characterized in that: The upper and lower sides of the upper positioning pin guide hole are provided with upper roller bearings (9-2) protruding from the upper positioning pin guide hole to form rolling friction with the upper positioning pin (6-3). The upper and lower sides of the lower positioning pin guide hole are provided with lower roller bearings (10-2) protruding from the lower positioning pin guide hole to form rolling friction with the lower positioning pin (7-3).

10. The roller changer bracket for the roller straightener according to claim 1, characterized in that: The splined shaft (4-5) of the intermediate coupling (4) is connected to the splined sleeve of the ball gear coupling (8), and the ball gear coupling (8) is connected to the gear distribution box of the straightening machine.

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