Working roll and coupler centering correction device and method for roll replacement of straightening machine

Abstract

The invention belongs to the field of roller type straightening machines, and particularly relates to a working roller and coupler centering correction device and method for roller replacement of a straightening machine. The device comprises an upper phase duplication sleeve, a lower phase duplication sleeve, a phase clamping plate, a positioning seat and a positioning block. Positioning blocks are arranged on a new lower roller box and an old lower roller box of the straightening machine to install a positioning seat, and the circumferential phases of spline teeth of all working rollers are locked through phase clamping plates. The spline tooth phase of the working roller on the old roller box is copied to the new roller box through the upper phase copying sleeve and the lower phase copying sleeve, and it is ensured that the spline tooth phase of the working roller on the new roller box is completely consistent with that of the old roller box. After the new roller box is pushed into the straightening machine, the spline shaft of each working roller can be smoothly butted with the spline housing of the corresponding coupler, the new and old roller boxes can be quickly replaced, the operation is simple and convenient, time and labor are saved, and the roller replacement efficiency of the straightening machine and the unit operation efficiency are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the field of roller straightening machines for metal strip shape correction equipment, and relates to a working roll and coupling centering correction device and method for roller replacement of a straightening machine. Background Art

[0002] Roller straightening machine is a key equipment used in the process of metal strip shape correction, which plays a decisive role in the final shape quality of the strip. The straightening machine is usually equipped with a set of upper and lower roller boxes. When the working rolls are worn to a certain extent, new roller boxes need to be replaced, which involves the replacement of the roller boxes of the straightening machine.

[0003] At present, the replacement of the straightening machine roll box in production mainly includes automatic roll change, semi-automatic roll change and manual roll change, but a considerable part of the straightening machine roll change belongs to manual roll change. The working roll of the straightening machine is usually connected to the coupling by involute spline or flat key, but most of them are connected by involute spline. Due to manufacturing and assembly errors, the phase of the external spline teeth on the transmission end of each working roll of the straightening machine is inconsistent on the circumference, and the phase of the internal spline teeth on each coupling is also different. When replacing the roll box, after pulling out the old roll box, although the corresponding coupling positions can be fixed to ensure that the phase of the internal spline teeth on each coupling remains unchanged, after each working roll on the new roll box is assembled, the phase of the external spline teeth on the transmission end is random, and the phase of the corresponding internal spline teeth of the coupling is generally different. This results in that when the new roll box is pushed into the straightening machine frame, each working roll on the roll box basically cannot be correctly inserted into the internal spline of the coupling, resulting in the failure of the roll change to be completed smoothly.

[0004] Generally speaking, to successfully complete the replacement of the old and new roller boxes, the following three conditions must be met: 1. Ensure that the center line of the working roll is aligned with the center line of the spline sleeve on the coupling in the height direction; 2. Ensure that the center line of the working roll is aligned horizontally with the center line of the spline sleeve on the coupling; 3. The external spline shaft teeth on the working roll are in phase with the internal spline sleeve teeth of the coupling.

[0005] The first two conditions are static conditions that are easy to achieve for all straightening machines after adjustment, while the last condition is a dynamic condition. For the automatic roll changing method, it needs to be realized with the help of necessary auxiliary positioning mechanisms. This article will not describe it here, but only the situation of manual roll changing operation will be described.

[0006] For straightening machines that use manual roll change operation, it is usually necessary to align all working rolls with the corresponding couplings one by one. In order to achieve alignment, it is necessary to repeatedly adjust the spline tooth phase of a single working roll in the circumferential direction until the outer spline shaft can be correctly inserted into the spline sleeve of the coupling. Due to the limitation of the operating space at the production site, it will affect people's observation and operation adjustment. In many cases, it is impossible to fully align all working rolls with the coupling on the machine, which may result in the need to pull out and push in the roll box once for each adjustment. It can be seen that to complete the correct connection of multiple working rolls with the coupling, the operation time can reach 3 to 9 hours (the more rolls, the longer the operation time), which consumes a lot of manpower and time, and the operation efficiency is very low. The situation is similar for the flat key connection method.

[0007] In order to improve the efficiency of manual roll changing operation and save manpower and time, some patents use the following method to assist roll changing operation: according to the number of rolls of the straightening machine, multiple sets of internal spline tooth matching plates are set. The function of the matching plates is equivalent to copying the phase of the internal spline teeth of the coupling, and then the matching plate group is used to adjust the phase of the external spline teeth of each working roll on the new roll box, so that the phase of the external spline teeth of each working roll is consistent with the phase of the internal spline teeth of the coupling, so that each working roll on the new roll box can be correctly inserted into the corresponding coupling. This method seems feasible in principle, but since the number of working rolls in the upper and lower roll boxes of the roller straightening machine is 3 to 11 and 4 to 12 respectively, the external spline teeth on the multiple working rolls in the new roll box must be aligned with the three teeth on each matching plate, and the number of teeth that need to be aligned may be as high as 21 to 69 teeth. For straightening machines with a small number of rollers, this method has certain operational practicality because its spatial layout is relatively loose and the corresponding matching plates are easy to make. However, for straightening machines with a large number of rollers, since its spatial layout is very compact and the size of the matching plates is very small, its structure is neither easy to implement nor convenient to operate, and thus its practicality is greatly reduced.

[0008] Therefore, it is very necessary to develop a simpler and more applicable auxiliary device for manual roll changing to quickly ensure that the phases of the internal and external spline teeth or flat keys remain consistent and reduce the roll changing operation time. Summary of the invention

[0009] In view of this, the purpose of the present invention is to provide a working roll and coupling alignment correction device and method for roll replacement of a straightening machine to solve the existing problems.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a working roll and coupling alignment and correction device for roller replacement of a straightening machine, comprising an old roll box and a new roll box of the same size and structure, the new and old roll boxes respectively comprising an upper roll box and a lower roll box connected up and down, the upper roll box is equipped with an upper working roll with a spline shaft and an upper roll box base; the lower roll box is equipped with a lower working roll with a spline shaft and a lower roll box base, and also comprises a lower roll box positioning block and a positioning seat respectively installed on the lower roll boxes of the new and old roll boxes, the upper surface of the lower roll box positioning block is a positioning reference surface guaranteed by machining, and the height and position of the positioning reference surface on the new and old roll boxes are consistent; it also comprises a phase clamp for clamping and fixing all upper working rolls or lower working rolls, and an upper phase copy sleeve and a lower phase copy sleeve for correction.

[0011] Optionally, the upper phase replication sleeve includes an upper spline sleeve, an upper swing screw, an upper ball head rocker and an upper locking nut, one end of the upper swing screw is connected to the upper spline sleeve through a thread, and the other end is also connected to the upper ball head rocker through a thread and locked by the upper locking nut.

[0012] Optionally, the lower phase replication sleeve includes a lower spline sleeve, a lower swing screw, a lower ball head swing rod and a lower locking nut; one end of the lower swing screw is connected to the lower spline sleeve through a thread, and the other end is also connected to the lower ball head swing rod through a thread and locked by the lower locking nut.

[0013] Optionally, the upper spline sleeve, upper swing screw and upper locking nut of the upper phase copy sleeve have the same structure as the corresponding parts of the lower spline sleeve, lower swing screw and lower locking nut of the lower phase copy sleeve, and are interchangeable structures; the internal splines on the upper and lower spline sleeves are involute splines or other forms of splines or flat keys, and their parameters and precision are consistent with the internal splines or flat keys on the coupling, thereby ensuring the interchangeability of the connection relationship between the spline shaft and the spline sleeve.

[0014] Optionally, the upper phase replication sleeve and the lower phase replication sleeve are provided with a structure with a guide hole or a structure without a guide hole, and the upper and lower swing screws are respectively connected to the upper ball head swing rod and the lower ball head swing rod by threads, and the axial relative position is adjustable, and the lower end of the upper ball head swing rod or the lower ball head swing rod is a spherical structure.

[0015] Optionally, the positioning seat includes a fixed bracket, a positioning beam, screws, and connecting bolts. The fixed bracket is provided with two left and right parts, which are provided with positioning slots for installing the positioning beam, and the positioning beam is locked to the fixed bracket by screws. The fixed bracket is fixed to the lower roller box positioning block by connecting bolts.

[0016] Optionally, the lower roll box positioning block is welded and fixed on both sides of the lower roll box, and its upper surface is a positioning reference surface ensured by machining, which is the installation reference of the entire device and is provided on both the new and old roll boxes. The height H1 of the positioning block reference surface from the center of all lower working rolls is exactly the same, and the positioning block is used to limit the position of the positioning seat in the height direction.

[0017] Optionally, the phase clamp includes an upper clamp, a lower clamp, connecting bolts and nuts, and the upper clamp and the lower clamp are respectively arranged on the upper and lower sides of the working roll and fixed by connecting bolts and nuts; the upper clamp and the lower clamp are both processed with arc grooves equal to the outer diameter of the spline, and are arranged according to the spacing of the working rolls, so that all upper working rolls or all lower working rolls can be clamped when clamping.

[0018] The method for aligning and correcting the working roll and coupling for roller replacement of a straightening machine uses the above-mentioned working roll and coupling alignment and correction device for roller replacement of a straightening machine. Since the structural dimensions of the new and old roll boxes are consistent, for the working rolls at any position, the height value H1 from the upper surface of the positioning beam to the center of the lower working roll and the height value H2 to the center of the upper working roll are fixed values; the method comprises the following steps: S1, when the old roll box is pulled out of the straightening machine, first align the arc grooves on the upper clamping plate and the lower clamping plate with the splines at the ends of all the lower working rolls, and then use the connecting bolts and nuts to firmly lock the upper clamping plate and the lower clamping plate to all the lower working rolls to keep them immobile; S2, install the positioning block and the positioning seat on the lower roller box of the new and old roller boxes respectively; first install the fixed bracket on the positioning block, and then fix the fixed bracket on the lower roller box base with the connecting bolts, and then put the positioning beam into the positioning slot of the fixed bracket, and fasten the fixed bracket and the positioning beam together with screws; S3, according to the serial numbering sequence of the working rolls on the roll box, first put the lower phase copy on the spline of the working roll numbered 1#, then rotate the lower ball head swing arm in the opposite direction until the hemispherical head at its end is tangent to the upper surface of the positioning beam on the old roll box, and then tighten the lower locking nut. At this time, the length of the line between the tangent point and the center of the corresponding working roll is L1, and the angle between L1 and the vertical direction is θ1; S4, take off the lower phase copy sleeve, and put the lower phase copy sleeve on the corresponding 1# working roller spline on the new roller box, then rotate the lower phase copy sleeve to make the hemispherical head of the lower ball head swing arm tangent to the upper surface of the positioning beam on the new roller box. Since the size H1 on the new and old roller boxes is the same, and the size L1 also remains unchanged, the angle θ1'=θ1 formed at this time, so that the phase information of the 1# working roller spline on the old roller box is completely copied to the 1# working roller spline on the new roller box; and so on, the phase information of the remaining lower working roller splines on the old roller box is copied to the corresponding working roller splines of the new roller box in sequence; S5, after completing the phase information replication of all lower working rolls on the lower roll box, the same method is used to disassemble the phase clamp from the lower roll box and reinstall it on all upper working rolls of the upper roll box, and all upper working rolls are firmly locked. The upper phase replication sleeve is used to operate the upper roll boxes of the new and old roll boxes in the same way as S3~S4. Since the dimension L2 of the line connecting the center of the upper working roll and the tangent point and the dimension H2 of the height value from the upper surface of the positioning beam to the center of the upper working roll are respectively equal, the corresponding angle θ2'=θ2 is formed, and the phase information replication of the spline of the upper working roll is completed in sequence; S6, the spline phase information on all the upper working rolls on the old upper roll box is copied to the splines of all the upper working rolls of the new roll box one by one, thereby completing the copying and transmission of the phase information of the new and old roll boxes.

[0019] The beneficial effects of the present invention are as follows: the present invention arranges positioning blocks on both the new and old lower roller boxes of the straightening machine for installing the positioning seats, and utilizes the arranged phase clamps to lock the circumferential phases of the spline teeth of all the working rollers, and then replicates the phases of the spline teeth on each working roller on the old roller box to the corresponding positions on the new roller box through the arranged upper phase copy sleeve and the lower phase copy sleeve, so that the phases of the spline teeth on each working roller on the new roller box are exactly the same as the corresponding positions of the old roller box, and after the new roller box is pushed into the frame of the straightening machine, the spline shafts on each working roller and the spline sleeves on the coupling can be smoothly inserted and docked, and the replacement of the new and old roller boxes can be quickly realized, which is simple to operate, saves time and effort, can greatly improve the efficiency of roller replacement of the straightening machine, and correspondingly improves the operating efficiency of the unit.

[0020] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, 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 description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein: Figure 1~Figure 4 It is a schematic diagram of the auxiliary device for centering and correcting the working roll and the coupling for roller straightening machine roll replacement of the present invention; in Figure 1 and Figure 2 The arrangement of the relevant structure on the old roller box is shown below. Figure 3 and Figure 4 The arrangement of the relevant structures on the new roller box; Figure 5 This is the structural diagram of the upper phase replication set; Figure 6It is the structural diagram of the lower phase replication set; in, Figure 5 and Figure 6 The right side of the figure is a structural diagram with a guide hole, and the left side is a structural diagram without a guide hole; Figure 7 It is the structural diagram of the phase splint; Figure 8 for Figure 7 A-direction view; Fig. 9 It is the structural diagram of the positioning seat; Fig.10 for Fig. 9 B-direction view; Fig.11 for Fig. 9 A magnified view of I.

[0022] Figure markings: upper phase copy sleeve 1, upper spline sleeve 1-1, upper swing screw 1-2, upper ball head rocker 1-3, upper locking nut 1-4, lower phase copy sleeve 2, lower spline sleeve 2-1, lower swing screw 2-2, lower ball head rocker 2-3, lower locking nut 2-4, phase clamp 3, upper clamp 3-1, lower clamp 3-2, connecting bolt 3-3, nut 3-4, positioning seat 4, fixing bracket 4-1, positioning beam 4-2, screw 4-3, connecting bolt 4-4, positioning block 5, upper roller box 6, upper working roller 6-1, base 6-2, lower roller box 7, lower working roller 7-1, base 7-2. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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 only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0025] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0026] See also Figures 1 to 11 The invention discloses a working roll and coupling alignment correction device and method for roller replacement of a straightening machine. The device mainly comprises an upper phase copy sleeve 1, a lower phase copy sleeve 2, a phase clamp 3, a positioning seat 4, a positioning block 5, an upper roll box 6 and a lower roll box 7.

[0027] The dimensions H and H1 on the new and old roll boxes must be consistent (H1 is the height value from the upper surface of the positioning beam to the center of the lower working roll, and H2 is the height value of the center of the upper working roll), and machining is used to ensure that the height from the reference surface of the positioning block to the center of all lower working rolls is: H1+H, and the dimension H* is the center height of the upper and lower working rolls when the upper and lower roll boxes are stacked together in the roll changing state, which is a fixed structural value during design, and the dimension H2=H1+H*.

[0028] In this embodiment, the figure illustrates the replacement of the upper and lower roller boxes of a 15-roller straightening machine. This structure is not limited to straightening machines with 15 rollers (7 upper and 8 lower), but is also applicable to roller straightening machines with other numbers of rollers. For example, roller straightening machines with 5 to 21 rollers can also use this similar method to achieve rapid roller replacement.

[0029] The upper phase duplication sleeve 1 mainly includes: an upper spline sleeve 1-1, an upper swing screw 1-2, an upper ball head swing rod 1-3, and an upper locking nut 1-4. The parameters and manufacturing precision of the internal spline on the upper spline sleeve 1-1 are consistent with those of the internal spline on the coupling, which ensures the interchangeability of the connection relationship between the spline shaft and the spline sleeve. One end of the upper swing screw 1-2 is connected to the upper spline sleeve 1-1 through a thread, and the other end is also connected to the upper ball head swing rod 1-3 through a thread, and is locked by the upper locking nut 1-4.

[0030] The lower phase copying sleeve 2 mainly includes: a lower spline sleeve 2-1, a lower swing screw 2-2, a lower ball head swing rod 2-3, and a lower locking nut 2-4. The lower spline sleeve 2-1, the lower swing screw 2-2 and the lower locking nut 2-4 are completely interchangeable with the corresponding parts of the upper phase copying sleeve, namely, the upper spline sleeve 1-1, the upper swing screw 1-2 and the upper locking nut 1-4. One end of the lower swing screw 2-2 is connected to the lower spline sleeve 2-1 through a thread, and the other end is also connected to the lower ball head swing rod 2-3 through a thread, and is locked by the lower locking nut 2-4.

[0031] In this embodiment, Figure 5 The upper phase replica set 1 and Figure 6 The lower phase replica set 2 shown in the figure is exactly the same in structure, except for the length of the ball head swing rod (which can also be adjusted). The other parts are completely interchangeable. For the sake of easy distinction, they are still described separately here.

[0032] In this embodiment, due to the difference in the design of the spline shaft at the end of the working roll, some spline shafts are designed with guide columns, while others are not. The spline sleeve structure provided on the upper phase replication sleeve or the lower phase replication sleeve can be adaptively adjusted according to the actual situation to meet the structural needs (refer to Figure 5 , Figure 6 ).

[0033] The phase clamping plate 3 mainly includes: an upper clamping plate 3-1, a lower clamping plate 3-2, a connecting bolt 3-3 and a nut 3-4. The upper clamping plate 3-1 and the lower clamping plate 3-2 are both processed with arc grooves equal to the outer diameter of the spline, and are arranged according to the spacing of the working rolls so that all the upper working rolls or all the lower working rolls can be clamped when clamping.

[0034] The positioning seat 4 mainly includes: a fixed bracket 4-1, a positioning beam 4-2, screws 4-3, and connecting bolts 4-4. The fixed bracket 4-1 is provided with two left and right parts, which are provided with positioning slots for installing the positioning beam 4-2, which can be locked on the fixed bracket 4-1 by screws 4-3. The fixed bracket 4-1 can be fixed to the positioning block 5 on the lower roller box 7 by connecting bolts 4-4.

[0035] The lower roller box positioning block 5 is welded on the side wall of the lower roller box, and its upper surface is a positioning reference surface guaranteed by machining. The height and position of the positioning reference surface on the new and old roller boxes are the same.

[0036] An upper working roll 6-1 with a spline shaft and a base 6-2 are installed on the upper roll box 6.

[0037] The lower roll box 7 is provided with a lower working roll 7-1 with a spline shaft and a base 7-2.

[0038] The present invention provides a method for centering and correcting a working roll and a coupling for roller replacement of a straightening machine, comprising the following steps: Figure 1 As shown, after the old roll box is pulled out of the straightening machine, first align the arc grooves on the upper clamp 3-1 and the lower clamp 3-2 with the splines at the ends of all the lower working rolls 7-1, and then use the connecting bolts 3-3 and nuts 3-4 to firmly lock the upper clamp 3-1 and the lower clamp 3-2 on all the lower working rolls 7-1 to keep them stationary.

[0039] Next, place the positioning seat 4 according to Figure 1 and Figure 2 The position shown in the figure is firmly installed on the lower roller box 7. First, install the fixed bracket 4-1 on the positioning block 5, then fix the fixed bracket 4-1 on the lower roller box base 7-2 through the connecting bolt 4-4, then put the positioning beam 4-2 into the positioning slot of the fixed bracket 4-1, and fasten the fixed bracket 4-1 and the positioning beam 4-2 together with the screw 4-3.

[0040] Next, according to the numbering sequence of 1 to 15 of the working rolls on the roll box, first put the lower phase copy sleeve 2 on the spline of the working roll 7-1 numbered 1#. Note that before putting the lower phase copy sleeve 2 into the spline of the 1# working roll 7-1, first screw the lower ball head swing rod 2-3 into the lower swing screw 2-2 as much as possible to make its total length as short as possible to avoid interference with the upper surface of the positioning beam 4-2. Note that when inserting the lower phase copy sleeve 2, refer to the position shown in the figure, and then rotate the lower ball head swing rod 2-3 in the opposite direction until the hemispherical head at its end is tangent to the upper surface of the positioning beam 4-2, and then tighten the lower locking nut 2-4. At this time, the length L1 of the line between the tangent point and the center of the corresponding working roll is fixed ( Figure 2 In the figure, since the dimension H1 is also a constant, the angle θ1 between L1 and the vertical direction is uniquely determined. In this way, the spline phase information of the 1# working roll 7-1 in this state is recorded.

[0041] Next, carefully remove the lower phase copy sleeve 2, according to Figure 3 In the position shown, the lower phase copy sleeve 2 is set on the corresponding 1# working roller spline on the new roller box, and then the phase copy sleeve 2 is rotated to make the hemispherical head of the lower ball head swing rod 2-3 tangent to the upper surface of the positioning beam 4-2. Since the size H1 on the new and old roller boxes is the same, and the size L1 remains unchanged, the angle θ1'=θ1 is formed at this time, so that the phase information of the 1# working roller spline on the old roller box is completely copied to the 1# working roller spline on the new roller box. By analogy, the phase information of the remaining lower working roller splines on the old roller box can be copied to the corresponding working roller splines of the new roller box in sequence.

[0042] In this embodiment, it should be noted that when replicating the phase of the splines on other working rolls, since the phases between the working rolls are generally different, the corresponding connecting line lengths L1 are also different, and the corresponding angles θ1 are also different, so the lower ball head rocker 2-3 is made into an adjustable structure.

[0043] Next, the phase copy sleeve 2 is removed from the new roll box. During this process, it is important to move it out along the axial direction of the working roll without any rotational movement, otherwise the phase information of the spline on the working roll will change.

[0044] Next, the same method is used for the new and old upper roll boxes. Similarly, on the new and old upper roll boxes 6, since the size L2 and the size H2 of the line connecting the center and the tangent point of the upper working roll are equal, the corresponding angle θ2'=θ2 is formed. After completing the phase information copying of all the lower working rolls 7-1 on the new and old lower roll boxes 7, the same method is used to disassemble the phase clamp 3 from the lower roll box 7 and reinstall it on all the upper working rolls 6-1 of the upper roll box 6, and all the upper working rolls 6-1 are firmly locked, and according to Figure 1 and Figure 2 By performing the same operation at the position shown, the spline phase information on all the upper working rolls 6-1 on the old upper roll box 6 can be copied one by one to the splines of all the upper working rolls 6-1 of the new roll box, thereby completing the copying and transmission of the phase information of the new and old roll boxes.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A working roll and coupling alignment correction device for roller replacement of a straightening machine, comprising an old roll box and a new roll box of the same size and structure, wherein the new and old roll boxes respectively comprise an upper roll box and a lower roll box connected up and down, wherein the upper roll box is provided with an upper working roll with a spline shaft and an upper roll box base; and the lower roll box is provided with a lower working roll with a spline shaft and a lower roll box base, wherein: It also includes a lower roller box positioning block and a positioning seat respectively installed on the lower roller box of the new and old roller boxes. The upper surface of the lower roller box positioning block is a positioning reference surface guaranteed by machining, and the height and position of the positioning reference surface on the new and old roller boxes are consistent; it also includes a phase clamp for clamping and fixing all upper working rolls or lower working rolls, and an upper phase replication sleeve and a lower phase replication sleeve for correction.

2. The working roll and coupling alignment and correction device for roll replacement of a straightening machine according to claim 1 is characterized in that: The upper phase duplication sleeve includes an upper spline sleeve, an upper swing screw, an upper ball head swing rod and an upper locking nut. One end of the upper swing screw is connected to the upper spline sleeve through a thread, and the other end is also connected to the upper ball head swing rod through a thread and locked by the upper locking nut.

3. The working roll and coupling alignment and correction device for roll replacement of a straightening machine according to claim 2 is characterized in that: The lower phase duplication sleeve includes a lower spline sleeve, a lower swing screw, a lower ball head swing rod and a lower locking nut; one end of the lower swing screw is connected to the lower spline sleeve through a thread, and the other end is also connected to the lower ball head swing rod through a thread and locked by the lower locking nut.

4. The working roll and coupling alignment and correction device for roll replacement of a straightening machine according to claim 3 is characterized in that: The upper spline sleeve, upper swing screw and upper locking nut of the upper phase copy sleeve have the same structure as the corresponding parts of the lower spline sleeve, lower swing screw and lower locking nut of the lower phase copy sleeve, and are interchangeable structures; the internal splines on the upper and lower spline sleeves are involute splines or other forms of splines or flat keys, and their parameters and precision are consistent with the internal splines or flat keys on the coupling, ensuring the interchangeability of the connection relationship between the spline shaft and the spline sleeve.

5. The working roll and coupling alignment correction device for roller replacement of a straightening machine according to claim 3 is characterized in that: The upper phase replication sleeve and the lower phase replication sleeve are provided with a structure with a guide hole or a structure without a guide hole. The upper and lower swing screws are respectively connected to the upper ball head swing rod and the lower ball head swing rod by threads. The axial relative positions are adjustable. The lower end of the upper ball head swing rod or the lower ball head swing rod is a spherical structure.

6. The working roll and coupling alignment correction device for roll replacement of a straightening machine according to claim 1 is characterized in that: The positioning seat includes a fixed bracket, a positioning beam, screws, and connecting bolts. The fixed bracket is provided with two left and right parts, which are provided with positioning slots for installing the positioning beam, and the positioning beam is locked on the fixed bracket by screws. The fixed bracket is fixed to the lower roller box positioning block by connecting bolts.

7. The working roll and coupling alignment and correction device for roll replacement of a straightening machine according to claim 1 is characterized in that: The lower roll box positioning block is welded and fixed on both sides of the lower roll box side wall. Its upper surface is the positioning reference surface guaranteed by machining. It is the installation reference of the entire device and is provided on both new and old roll boxes. The reference surface of the positioning block is exactly the same height H1 from the center of all lower working rolls. The positioning block is used to limit the position of the positioning seat in the height direction.

8. The working roll and coupling alignment and correction device for roll replacement of a straightening machine according to claim 1 is characterized in that: The phase clamp includes an upper clamp, a lower clamp, connecting bolts and nuts. The upper clamp and the lower clamp are respectively arranged on the upper and lower sides of the working roll and are fixed by connecting bolts and nuts. The upper clamp and the lower clamp are both processed with arc grooves equal to the outer diameter of the spline, and are arranged according to the spacing of the working rolls so that all upper working rolls or all lower working rolls can be clamped when clamping.

9. A method for aligning and correcting a working roll and a coupling for roller replacement in a straightening machine, using a device for aligning and correcting a working roll and a coupling for roller replacement in a straightening machine as claimed in any one of claims 1 to 8, characterized in that: Since the new and old roll boxes have the same structural dimensions, and the height and position of the positioning block and the positioning reference surface determined by the positioning beam are consistent, for the working rolls at any position, the height value H1 from the upper surface of the positioning beam to the center of the lower working roll and the height value H2 from the upper surface of the positioning beam to the center of the upper working roll are fixed values; the following steps are included: S1, when the old roll box is pulled out of the straightening machine, first align the arc grooves on the upper clamping plate and the lower clamping plate with the splines at the ends of all the lower working rolls, and then use the connecting bolts and nuts to firmly lock the upper clamping plate and the lower clamping plate to all the lower working rolls to keep them immobile; S2, install the positioning block and the positioning seat on the lower roller box of the new and old roller boxes respectively; first install the fixed bracket on the positioning block, and then fix the fixed bracket on the lower roller box base with the connecting bolts, and then put the positioning beam into the positioning slot of the fixed bracket, and fasten the fixed bracket and the positioning beam together with screws; S3, according to the serial numbering sequence of the working rolls on the roll box, first put the lower phase copy on the spline of the working roll numbered 1#, then rotate the lower ball head swing arm in the opposite direction until the hemispherical head at its end is tangent to the upper surface of the positioning beam on the old roll box, and then tighten the lower locking nut. At this time, the length of the line between the tangent point and the center of the corresponding working roll is L1, and the angle between L1 and the vertical direction is θ1; S4, take off the lower phase copy sleeve, and put the lower phase copy sleeve on the corresponding 1# working roller spline on the new roller box, then rotate the lower phase copy sleeve to make the hemispherical head of the lower ball head swing arm tangent to the upper surface of the positioning beam on the new roller box. Since the size H1 on the new and old roller boxes is the same, and the size L1 also remains unchanged, the angle θ1'=θ1 formed at this time, so that the phase information of the 1# working roller spline on the old roller box is completely copied to the 1# working roller spline on the new roller box; and so on, the phase information of the remaining lower working roller splines on the old roller box is copied to the corresponding working roller splines of the new roller box in sequence; S5, after completing the phase information replication of all lower working rolls on the lower roll box, the same method is used to disassemble the phase clamp from the lower roll box and reinstall it on all upper working rolls of the upper roll box, and all upper working rolls are firmly locked. The upper phase replication sleeve is used to operate the upper roll boxes of the new and old roll boxes in the same way as S3-S4. Since the dimension L2 of the line connecting the center of the upper working roll and the tangent point and the dimension H2 of the height value from the upper surface of the positioning beam to the center of the upper working roll are respectively equal, the corresponding angle θ2'=θ2 is formed, and the phase information replication of the spline of the upper working roll is completed in sequence; S6, the spline phase information on all the upper working rolls on the old upper roll box is copied to the splines of all the upper working rolls of the new roll box one by one, thereby completing the copying and transmission of the phase information of the new and old roll boxes.

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