A method for calibrating the accuracy of a slitting machine's rotary cutter

Abstract

The present application belongs to the technical field of longitudinal cutting of stainless steel strip, and particularly relates to a precision calibration method for a slitting machine disc shear, which can accurately measure and compensate the lateral gap of the disc shear blade. The slitting machine comprises an upper blade shaft and a lower blade shaft, the upper blade shaft is provided with an upper disc shear, and the lower blade shaft is provided with a lower disc shear. The technical scheme is that the precision calibration method for the disc shear of the slitting machine comprises: precision calibration of the upper disc shear and the lower disc shear in the axial direction of the upper blade shaft; and precision calibration of the gap between the upper disc shear and the lower disc shear.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel strip slitting technology, and particularly relates to a method for calibrating the precision of a disc shear in a slitting machine. Background Technology

[0002] With the development of materials technology, the requirements for edge shearing burrs on corrugated pipe steel strips used in downstream automobiles are becoming increasingly stringent. Excessive or uneven burrs may cause cracking of the corrugated pipe weld.

[0003] The disc shear is a key piece of equipment in a slitting machine for edge trimming of steel strips, and it has a decisive impact on the quality of burrs on the steel strip edges. Over long-term use, the mechanical properties and dimensions of the disc shear accumulate varying degrees of error. In particular, shoulder misalignment and slippage can cause deviations in the lateral clearance of the disc shear blades. If these deviations are not calibrated and corrected in time, they will directly result in abnormal burrs on the steel strip edges. Summary of the Invention

[0004] To overcome the deficiencies in the aforementioned related technologies, the present invention provides a method for calibrating the precision of a disc shear in a slitting machine, which can accurately measure and compensate for the lateral clearance of the disc shear blade.

[0005] To achieve the above technical objectives, this invention provides a method for calibrating the precision of the disc shears in a slitting machine. The slitting machine includes an upper cutter shaft and a lower cutter shaft. An upper disc shear is mounted on the upper cutter shaft, and a lower disc shear is mounted on the lower cutter shaft. The method for calibrating the precision of the disc shears in the slitting machine includes: calibrating the axial precision of the upper and lower disc shears along the upper cutter shaft; and calibrating the precision of the gap between the upper and lower disc shears.

[0006] Preferably, the upper cutter shaft includes a first upper cutter shaft and a second upper cutter shaft, which are coaxially and fixedly connected. The lower cutter shaft includes a first lower cutter shaft and a second lower cutter shaft, which are coaxially and fixedly connected. The method for calibrating the axial precision of the upper and lower disc shears on the upper cutter shaft includes: fixing the upper disc shear tightly against the side of the first upper cutter shaft to the second upper cutter shaft; providing a gap ring and a lower disc shear on the second lower cutter shaft, with a distance of 3.00mm~4.00mm between the lower disc shear and the side of the first lower cutter shaft; adjusting the downward pressure of the upper cutter shaft to achieve an overlap height of 0.800mm~0.900mm between the upper and lower disc shears; dividing the side of the upper disc shear into N equal regions, and measuring the gap value x of the side of the lower disc shear corresponding to each of the N regions. Obtain the average of N gap values ​​x. When the absolute value of the difference Y between each of the N gap values ​​x and the average is greater than 0.01 mm, perform flatness repair at the position corresponding to the side of the first upper cutter shaft.

[0007] Preferably, after fixing the upper disc shear tightly against the side of the first upper cutter shaft to the second upper cutter shaft, the method for calibrating the axial accuracy of the upper disc shear and the lower disc shear on the upper cutter shaft further includes fixing a gap ring or a pusher ring on the second upper cutter shaft away from the first upper cutter shaft.

[0008] Preferably, the lower disc shear and the upper disc shear have the same diameter.

[0009] Preferably, the thickness tolerance of the upper disc shear, lower disc shear, gap ring, and pusher ring is ±0.001mm.

[0010] Preferably, after the axial accuracy calibration of the upper and lower disc shears on the upper cutter shaft is completed, the accuracy calibration of the gap between the upper and lower disc shears is performed. The method for calibrating the accuracy of the gap between the upper and lower disc shears includes: when the gap value x is greater than or equal to a first threshold Z, moving the upper disc shear a distance a towards the lower disc shear; when the gap value x is less than the first threshold Z, moving the upper disc shear a distance b away from the lower disc shear. The upper and lower disc shears are used to shear the steel strip, and burr data from the near-axis shoulder side and the far-axis shoulder side of the steel strip are collected. The moving distance a or b corresponding to the combination with the smallest average burr data from the near-axis shoulder side and the far-axis shoulder side is the accuracy calibration value of the gap between the upper and lower disc shears. Wherein, the value of distance a is XZ or X+0.01-Z, and the value of distance b is XZ-0.01 or XZ.

[0011] Preferably, a first gap ring and / or a second gap ring are used. The method for calibrating the accuracy of the gap between the upper disc shear and the lower disc shear further includes: when the gap value x is greater than or equal to a first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft of the upper disc shear on the side away from the lower disc shear, and the upper disc shear is moved a distance a in the direction closer to the lower disc shear, with the side of the first gap ring or the second gap ring near the upper disc shear as a reference.

[0012] When the gap value x is less than the first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft of the upper disc shear near the lower disc shear. Taking the side of the first gap ring or the second gap ring near the upper disc shear as a reference, the upper disc shear is moved a distance b away from the lower disc shear.

[0013] The width of the first gap ring is 1.005 mm, and the width of the second gap ring is 1.0025 mm.

[0014] Preferably, before the precision calibration of the gap between the upper and lower disc shears, the parallelism between the upper and lower cutter shafts is ≤0.008mm.

[0015] The beneficial effects of this invention are as follows:

[0016] First, the gaps between different areas of the upper and lower disc shears are measured, and the difference Y between each gap value x and the average value is obtained. This allows us to determine where there is an error in the flatness of the upper cutter shaft side. By grinding the error location, the difference Y between the gap value x and the average value of each area between the upper and lower disc shears is reduced, thereby improving the gap accuracy between the upper and lower disc shears.

[0017] Secondly, the precision calibration of the gap between the upper and lower disc shears can adjust the gap between them to obtain a better gap value for the cut steel strip burr data, thereby improving the quality of the cut steel strip. Attached Figure Description

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

[0019] Figure 1A step diagram illustrating the method for calibrating the precision of a disc shear in a slitting machine, provided by this invention;

[0020] Figure 2 A structural diagram of the upper and lower cutter shafts of a slitting machine provided by the present invention;

[0021] Figure 3 A step diagram illustrating the method for calibrating the axial accuracy of the upper and lower disc shears on the upper cutter shaft, as provided by this invention.

[0022] Figure 4 The present invention provides a structural diagram of an upper and lower disc shear of a slitting machine;

[0023] Figure 5 A schematic diagram illustrating the error generated by the upper and lower disc shears provided by the present invention;

[0024] Figure 6 Another schematic diagram illustrating the error generated by the upper and lower disc shears provided by the present invention;

[0025] Figure 7 A step diagram illustrating the method for calibrating the precision of the gap between the upper and lower disc shears provided by this invention;

[0026] Figure 8 A structural diagram is provided for calibrating the accuracy of the gap between the upper and lower disc shears provided by the present invention.

[0027] Figure 9 Another structural diagram for calibrating the precision of the gap between the upper and lower disc shears provided by the present invention;

[0028] Figure 10 A step diagram illustrating the method for calibrating the precision of the gap between the upper and lower disc shears provided by this invention;

[0029] Figure 11 Another structural diagram for calibrating the gap between the upper and lower disc shears provided by the present invention;

[0030] Figure 12 Another structural diagram is provided for the accuracy calibration of the gap between the upper and lower disc shears provided by the present invention. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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, they should not be construed as limitations on this invention.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. The term "connection" can refer to a direct connection, an indirect connection through an intermediate medium, or a connection between the internal components of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] The following describes specific embodiments.

[0036] In some embodiments of the present invention, a method for calibrating the precision of the disc shear of a slitting machine is provided. The slitting machine includes an upper cutter shaft and a lower cutter shaft, which are arranged parallel to each other and located above the lower cutter shaft. An upper disc shear is mounted on the upper cutter shaft, and a lower disc shear is mounted on the lower cutter shaft. It is known that the lower and upper disc shears are vertically offset from each other; that is, their orthographic projections on the horizontal plane do not overlap.

[0037] To ensure the quality of steel strip shearing by the lower and upper disc shears, such as reducing burrs on the strip edges, the disc shears of the slitting machine need to be calibrated for precision. For example, Figure 1 As shown, the accuracy calibration method for the disc shear of the slitting machine includes:

[0038] S1. Perform axial accuracy calibration of the upper and lower disc shears on the upper cutter shaft.

[0039] S2. Accuracy calibration of the gap between the upper and lower disc shears.

[0040] In some embodiments, the upper cutting axis includes a first upper cutting axis and a second upper cutting axis, the first upper cutting axis and the second upper cutting axis being coaxially and fixedly connected, and the lower cutting axis includes a first lower cutting axis and a second lower cutting axis, the first lower cutting axis and the second lower cutting axis being coaxially and fixedly connected.

[0041] In some embodiments, after the upper disc shear is fixed to the side of the first upper cutter shaft and then to the second upper cutter shaft, the method for calibrating the axial accuracy of the upper disc shear and the lower disc shear on the upper cutter shaft further includes fixing a gap ring or a pusher ring on the second upper cutter shaft away from the first upper cutter shaft.

[0042] Generally, the lower cutter shaft is fixed relative to the frame of the slitting machine, while the upper cutter shaft can reciprocate axially relative to the lower cutter shaft. For example, Figure 2 As shown, the left part of the upper cutting axis 1 is the first upper cutting axis 11, and the right part is the second upper cutting axis 12. The left part of the lower cutting axis 2 is the first lower cutting axis 21, and the right part is the second lower cutting axis 22.

[0043] Among them, such as Figure 3 As shown, the method for calibrating the axial accuracy of the upper and lower disc shears on the upper cutter shaft includes:

[0044] S11. Fix the upper disc tightly against the side of the first upper cutter shaft and onto the second upper cutter shaft.

[0045] S12. A gap ring and a lower disc shear are provided on the second lower cutter shaft. The distance between the lower disc shear and the side of the first lower cutter shaft is 3.00mm~4.00mm.

[0046] S13. Adjust the downward pressure of the upper cutter shaft so that the overlap height between the upper and lower disc shears is 0.800mm~0.900mm.

[0047] S14. Divide the side of the upper disc shear into N equal regions, and measure the gap value x of the side of the lower disc shear corresponding to each of the N regions.

[0048] S15. Obtain the average of N gap values ​​x. When the absolute value of the difference Y between each of the N gap values ​​x and the average is greater than 0.01 mm, perform flatness repair at the position corresponding to the side of the first upper cutter shaft.

[0049] In some examples, the lower disc shear and the upper disc shear have the same diameter.

[0050] For example, such as Figure 4As shown, both the lower disc shear 4 and the upper disc shear 3 have a diameter of 4mm. With the upper cutter shaft 1 in its initial positioning state, the upper disc shear 3 is positioned on the second upper cutter shaft 12, tightly against the side of the first upper cutter shaft 11. That is, the upper disc shear 3 is fitted onto the shoulder of the upper cutter shaft 1. Gap rings 5 ​​or pusher rings 6 are provided at the remaining keyway positions of the upper cutter shaft 1. Two gap rings 5 ​​are fixed to the side of the first lower cutter shaft 21 on the second lower cutter shaft 22. The widths of the two gap rings 5 ​​are 3.00mm and 1.06mm respectively. The lower disc shear 4 is then positioned on the second lower cutter shaft 22, with the lower disc shear 4 tightly against the side of the gap ring 5 furthest from the first lower cutter shaft 12. Gap rings 5 ​​or pusher rings 6 are provided at the remaining keyway positions of the second lower cutter shaft 22 on the side of the lower disc shear 4 furthest from the first lower cutter shaft 12.

[0051] Start the equipment and move the upper cutter shaft 1 towards the lower cutter shaft 2 so that the upper disc shear 3 and the lower disc shear 4 overlap. That is, the orthographic projection of the lower disc shear 4 on the side of the upper disc shear 3 has an overlapping part O, and the height of the overlapping part O can be 0.800mm~0.900mm. For example, the height of the overlapping part O can be 0.800mm, 0.850mm or 0.900mm.

[0052] Manually rotate the upper cutter shaft 1, and measure the gap X at the overlapping position of the upper disc shear 3 and the lower disc shear 4 on one side at each rotation angle. A feeler gauge can be used for measurement. For example, feeler gauges of different thicknesses can be passed through the gap X at the overlapping position of the upper and lower disc shears. The maximum thickness that the feeler gauge can enter the gap X is the gap value x.

[0053] For example, the gap X at the overlapping position of the upper disc shear 3 and the lower disc shear 4 can be measured every 30°, 45°, or 60° rotation. It can be understood that the lower disc shear 4 and the upper disc shear 3 rotate at the same angle but in opposite directions. Therefore, the side surface of the upper disc shear 3 can be divided into N regions, where N can be 6, 8, or 12, and correspondingly, N gap values ​​x can be obtained.

[0054] It should be noted that the accuracy of the feeler gauge is 0.01mm, therefore, the accuracy of the gap value x is 0.01mm.

[0055] After obtaining N gap values ​​x, the average of the N gap values ​​x can be calculated. For example, the N gap values ​​x include gap value x1, gap value x2, ..., gap value x. n The average of the N gap values ​​x is

[0056]

[0057] When the absolute value of the difference Y between each gap value x and the average is greater than 0.01 mm, the flatness of the first upper tool shaft 11 corresponding to that gap value x is repaired. For example, Figure 5 As shown, if the gap value x is consistent with the average, then the gap value x between the upper disc shear 3 and the lower disc shear 4 is considered to be uniform and stable.

[0058] Or, such as Figure 6 As shown, the gap values ​​x1 and x2 between the upper disc shear 3 and the lower disc shear 4 differ from the average by more than 0.01 mm. For example, the difference between gap values ​​x1 and x2 causes the upper disc shear 3 to oscillate back and forth along the axial direction of the upper cutter shaft, resulting in poor shearing effect on the steel strip edge. Generally speaking, the main reason for the above problem is that the end face of the second upper cutter shaft 12 away from the first upper cutter shaft 11 becomes uneven due to long-term wear.

[0059] When the upper cutter shaft is running, a support shaft is provided on one side end face of the first upper cutter shaft 11. The support shaft rotates relative to the first upper cutter shaft 11. When one side end face of the first upper cutter shaft 11 is tilted, the first upper cutter shaft 11 rotates with it and is driven to reciprocate in its axial direction by the support shaft, thus causing the upper disc shear 3 to swing back and forth in the axial direction of the upper cutter shaft.

[0060] The flatness of one end face of the first upper cutter shaft 11 can be made to meet the production requirements of the slitting machine by grinding.

[0061] In some embodiments, the thickness tolerance of the upper disc shear, lower disc shear, gap ring, and pusher rubber ring is ±0.001mm.

[0062] To improve calibration accuracy, the thickness tolerances of the upper disc shear, lower disc shear, gap ring, and pusher rubber ring should be minimized as much as possible, and the positive and negative tolerances of each part should be equal on the same cutter shaft.

[0063] In some embodiments, after the axial accuracy calibration of the upper and lower disc shears on the upper cutter shaft is completed, the accuracy calibration of the gap between the upper and lower disc shears is performed. Wherein, as... Figure 7 As shown, the method for calibrating the accuracy of the gap between the upper and lower disc shears includes:

[0064] S21. When the gap value x is greater than or equal to the first threshold Z, move the upper disc shear a distance a towards the lower disc shear.

[0065] S22. When the gap value x is less than the first threshold Z, the upper disc shear is moved a distance b away from the lower disc shear.

[0066] S23. Use upper and lower disc shears to cut the steel strip and collect burr data on the near-axis shoulder side and the far-axis shoulder side of the steel strip. The combination of the minimum mean burr data on the near-axis shoulder side and the far-axis shoulder side corresponds to the movement distance a or movement distance b, which is the accuracy calibration value of the gap between the upper and lower disc shears.

[0067] Wherein, the value of distance a is XZ or X+0.01-Z, and the value of distance b is XZ-0.01 or XZ.

[0068] For example, such as Figure 8 As shown, after completing the axial accuracy calibration of the upper disc shear 3 and the lower disc shear 4 on the upper cutter shaft, the accuracy calibration of the gap between the upper disc shear 3 and the lower disc shear 4 can be performed.

[0069] The first threshold Z can be 0.06mm. The upper circular shear 3 can be located to the left of the lower circular shear 4. When the gap value x between the upper circular shear 3 and the lower circular shear 4 is greater than or equal to 0.06mm, the upper circular shear 3 should be displaced to the right by a distance a, where the value of distance a is X-0.06 and X-0.05. After each displacement, the slitting machine cuts the steel strip and collects data on the burrs on the edge of the cut steel strip. By comparing the data, the gap value x between the upper and lower circular shears can be adjusted to the optimal value.

[0070] It is understandable that the upper disc shear 3 is fixed to the second upper cutter shaft in close contact with the side of the first upper cutter shaft 11. Therefore, the displacement of the upper disc shear 3 is equivalent to the upper cutter shaft 1 moving in the same direction and at the same distance as the upper disc shear 3.

[0071] Or, such as Figure 9 As shown, the first threshold Z can be 0.06mm. The upper circular shear 3 can be located to the left of the lower circular shear 4. When the gap value x between the upper circular shear 3 and the lower circular shear 4 is less than 0.06mm, the upper circular shear 3 should be displaced to the left by a distance b, where the value of distance b is 0.06-X and 0.05-X. After each displacement, the slitting machine cuts the steel strip and collects data on the burrs on the edge of the cut steel strip. By comparing the data, the gap value x between the upper circular shear 3 and the lower circular shear 4 can be adjusted to the optimal value.

[0072] It should be noted that in this invention, a steel strip of the same type with a thickness of 0.05 mm can be used to inspect the shearing quality. Furthermore, because the feeler gauge accuracy is 0.01 mm, the accuracy of the gap between the upper and lower disc shears is currently greater than or equal to 0.01 mm.

[0073] In some embodiments, the width of the new gap ring is provided as 1.005 mm and 1.0025 mm. This allows the accuracy of the gap value between the upper and lower disc shears to be improved to 0.0025 mm.

[0074] This invention employs a first gap ring and / or a second gap ring, such as Figure 10 As shown, the method for calibrating the accuracy of the gap between the upper and lower disc shears also includes:

[0075] H21. When the gap value x is greater than or equal to the first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft on the side of the upper disc shear away from the lower disc shear. Taking the side of the first gap ring or the second gap ring near the upper disc shear as a reference, the upper disc shear is moved a distance a in the direction closer to the lower disc shear.

[0076] H22. When the gap value x is less than the first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft of the upper disc shear near the lower disc shear. Taking the side of the first gap ring or the second gap ring near the upper disc shear as a reference, the upper disc shear is moved a distance b away from the lower disc shear.

[0077] The width of the first gap ring is 1.005 mm, and the width of the second gap ring is 1.0025 mm.

[0078] For example, the first threshold Z is 0.06 mm, the width of the first gap ring is 1.005 mm, and the width of the second gap ring is 1.0025 mm.

[0079] A first clearance ring is fitted onto the second upper cutter shaft on the side of the upper disc shear away from the lower disc shear. Based on the side of the first clearance ring close to the upper disc shear, the upper disc shear is moved a certain distance towards the lower disc shear. At this time, the value of the distance between the current position of the upper disc shear and the previous position of the upper disc shear can be X-0.07+1.005.

[0080] Or, such as Figure 11 As shown, a second gap ring 8 is fitted on the second upper cutter shaft 12 on the side of the upper disc shear 3 away from the lower disc shear 4. Based on the side of the second gap ring 8 close to the upper disc shear 3, the upper disc shear 3 is moved a certain distance towards the lower disc shear 4. At this time, the value of the distance 'a' between the current position of the upper disc shear 3 and the previous position of the upper disc shear 3 can be X-0.06+0.0025.

[0081] Or, such as Figure 12As shown, a first gap ring 7 and a second gap ring 8 are fitted on the second upper cutter shaft 12 on the side of the upper disc shear 3 away from the lower disc shear 4. The second gap ring 8 can be close to the upper disc shear 3. Based on the side of the second gap ring 8 close to the upper disc shear 3, the upper disc shear 3 is moved a certain distance towards the lower disc shear 4. At this time, the value of the distance 'a' between the current position of the upper disc shear 3 and the previous position of the upper disc shear 3 can be X-0.07+1.0075.

[0082] This allows for four higher-precision displacements relative to the lower cutter axis: X-0.06, X-0.06+0.0025, X-0.06+0.005, and X-0.06+0.0075. After each displacement, a steel strip is used for shearing, and the data on the burrs on the edge of the steel strip is collected. After comparison and analysis, the optimal gap value x is selected.

[0083] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0084] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for calibrating the precision of the disc shear of a slitting machine, the slitting machine comprising an upper cutter shaft and a lower cutter shaft, wherein an upper disc shear is disposed on the upper cutter shaft and a lower disc shear is disposed on the lower cutter shaft; Its features are, The method for calibrating the disc shear accuracy of the slitting machine includes: The upper and lower disc shears are calibrated for axial accuracy on the upper cutter shaft. The precision calibration of the gap between the upper and lower disc shears; The upper cutting shaft includes a first upper cutting shaft and a second upper cutting shaft, the first upper cutting shaft and the second upper cutting shaft being coaxially and fixedly connected; the lower cutting shaft includes a first lower cutting shaft and a second lower cutting shaft, the first lower cutting shaft and the second lower cutting shaft being coaxially and fixedly connected. The method for calibrating the axial accuracy of the upper and lower disc shears on the upper cutter shaft includes: The upper disc is cut tightly against the side of the first upper cutter shaft and fixed to the second upper cutter shaft; A gap ring and a lower disc shear are provided on the second lower cutter shaft, and the distance between the lower disc shear and the side of the first lower cutter shaft is 3.00mm~4.00mm; Adjust the downward pressure of the upper cutter shaft so that the overlap height between the upper and lower disc shears is 0.800mm~0.900mm; Divide the side of the upper disc shear into N regions, and measure the gap value x of the side of the lower disc shear corresponding to each of the N regions; Obtain the average of N gap values ​​x. When the absolute value of the difference Y between each of the N gap values ​​x and the average is greater than 0.01 mm, perform flatness repair at the position corresponding to the side of the first upper cutter shaft.

2. The method for calibrating the precision of the disc shear of the slitting machine according to claim 1, characterized in that, After fixing the upper disc shear tightly against the side of the first upper cutter shaft to the second upper cutter shaft, the method for calibrating the axial accuracy of the upper disc shear and the lower disc shear on the upper cutter shaft further includes: A gap ring or a pusher ring is fixed on the second upper cutter shaft of the upper disc shear, which is away from the first upper cutter shaft.

3. The method for calibrating the precision of the disc shear of the slitting machine according to claim 1, characterized in that, The lower and upper disc shears have the same diameter.

4. The method for calibrating the precision of the disc shear of the slitting machine according to claim 2, characterized in that, The thickness tolerance of the upper disc shear, the lower disc shear, the gap ring, and the pusher ring is ±0.001mm.

5. The method for calibrating the precision of the disc shear of the slitting machine according to claim 1, characterized in that, After the axial accuracy of the upper and lower disc shears on the upper cutter shaft is calibrated, the accuracy of the gap between the upper and lower disc shears is calibrated. The method for calibrating the accuracy of the gap between the upper and lower circular shears includes: When the gap value x is greater than or equal to the first threshold Z, the upper disc shear is moved a distance a in the direction closer to the lower disc shear; When the gap value x is less than the first threshold Z, the upper disc shear is moved a distance b away from the lower disc shear. The upper and lower disc shears are used to cut the steel strip, and burr data of the near-axis shoulder and far-axis shoulder of the steel strip are collected. The combination of the minimum mean values ​​of the burr data of the near-axis shoulder and far-axis shoulder corresponds to the moving distance a or moving distance b, which is the accuracy calibration value of the gap between the upper and lower disc shears. Wherein, the value of distance a is xZ or x+0.01-Z, and the value of distance b is xZ-0.01 or xZ.

6. The method for calibrating the precision of the disc shear of the slitting machine according to claim 1, characterized in that, Employ a first gap ring and / or a second gap ring; The method for calibrating the accuracy of the gap between the upper and lower circular shears further includes: When the gap value x is greater than or equal to the first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft on the side of the upper disc shear away from the lower disc shear. Taking the side of the first gap ring or the second gap ring near the upper disc shear as a reference, the upper disc shear is moved a distance a in the direction closer to the lower disc shear. When the gap value x is less than the first threshold Z, the first gap ring and / or the second gap ring are set on the second upper cutter shaft of the upper disc shear near the lower disc shear. Based on the side of the first gap ring or the second gap ring near the upper disc shear, the upper disc shear is moved a distance b away from the lower disc shear. The width of the first gap ring is 1.005 mm, and the width of the second gap ring is 1.0025 mm.

7. The method for calibrating the precision of the disc shear of the slitting machine according to claim 1, characterized in that, Before calibrating the precision of the gap between the upper and lower disc shears, The parallelism between the upper and lower cutter shafts is ≤0.008mm.

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