A reel and a method of improving control of wind layer faults

Abstract

The application discloses a kind of reel and the control method for improving winding layer error, the reel includes: sector plate, pyramid sleeve and copper lining plate between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, the copper lining plate is fixedly connected with the sliding surface of the sector plate;The contact area between the copper lining plate and the sliding surface of the pyramid sleeve is not less than 80%, and the maximum sliding gap between the copper lining plate and the sliding surface of the pyramid sleeve is between 0-0.05mm.The appearance structure of the reel can greatly improve the shaking problem when uncoiling, effectively inhibit winding layer error.

Description

Technical Field

[0001] This invention relates to the field of rewinding unit production technology, and in particular to a winding drum and a method for improving the control of winding layer misalignment. Background Technology

[0002] Layering misalignment refers to a quality defect in steel strip winding where the end faces of each layer are not uniform after winding by a coiling machine, resulting in individual or multiple layers showing obvious protrusions or depressions on the coil end face. Overall, continuous misalignment in multi-layer steel coils is also called towering, while discontinuous misalignment in single or individual layers is defined as layering misalignment. If layering misalignment defects in finished electrical steel coils exceed a certain standard, it will affect subsequent packaging and lifting, and also significantly impact downstream customers' slitting, punching, and other uses.

[0003] Existing domestic recoiling production lines' solutions to delamination issues primarily focus on edge position control (EPC) / strip automatic center position control (CPC) detection, tension control, and program optimization. While these methods often achieve millimeter-level results, downstream electrical steel customers require delamination rates of less than 1mm, with typical internal control targets for electrical steel production at 0.6mm. Finishing lines are short and have concentrated equipment (approximately 16 meters between the uncoiler and coiler), leading to significant inter-equipment interference and consistently poor delamination control, resulting in a low percentage of lines meeting internal control targets. Summary of the Invention

[0004] This application provides a winding drum and a control method for improving winding layer misalignment. By repairing defects in the uncoiler drum, improving the drum's shape and control accuracy, it greatly reduces vibration during unwinding, thereby optimizing the winding layer misalignment problem in the uncoiler and improving production accuracy.

[0005] In a first aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0006] A reel includes: a sector plate, a pyramid sleeve, and a copper backing plate disposed between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, wherein the copper backing plate is fixedly connected to the sliding surface of the sector plate; the contact area between the copper backing plate and the sliding surface of the pyramid sleeve is not less than 80%, and the maximum sliding gap between the copper backing plate and the sliding surface of the pyramid sleeve is between 0 and 0.05 mm.

[0007] Preferably, the outer arc of the sector plate is high in the middle and low on both sides, and the distribution of the high position in the middle of the sector plate accounts for 60% to 80% of the total outer arc; the circular runout of the outer circle at the high position is less than or equal to 0.2 mm, and the difference between the roundness value of the outer circle at the high position and the target roundness value is less than or equal to 0.2 mm.

[0008] Secondly, the present invention provides the following technical solution through an embodiment of the present invention:

[0009] A method for improving the control of winding layering faults, wherein the uncoiler includes the roll described in the first aspect above, the method comprising: when winding layering faults exist in the uncoiler, performing the following shape repair steps on the uncoiler roll: grinding a copper backing plate between the sliding surface of a sector plate and the sliding surface of a pyramid sleeve, such that the contact area between the copper backing plate fixedly connected to the sliding surface of the sector plate and the sliding surface of the pyramid sleeve is not less than 80%, and controlling the maximum sliding gap between the copper backing plate and the sliding surface of the pyramid sleeve to be between 0 and 0.05 mm.

[0010] Preferably, the shape repair step further includes: grinding the sliding surfaces of the copper backing plate, the sector plate, and the pyramid sleeve to a preset thickness, and expanding the outer diameter of the sector plate based on the preset thickness to restore the outer diameter of the sector plate, wherein the sliding surface of the sector plate is the sliding surface that is not fixedly connected to the copper backing plate; and fine grinding the outer circle of the sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter to obtain the finely ground sector plate.

[0011] Preferably, expanding the outer diameter of the sector plate based on the preset thickness includes: calculating the height reduction of the ground sector plate in the diameter direction based on the inclination angle of the sliding surface of the pyramid sleeve and the preset thickness; determining the displacement that the pyramid sleeve needs to move based on the height reduction; and controlling the pyramid sleeve to move the displacement towards the copper sliding plate at the end of the sector plate to expand the outer diameter of the sector plate.

[0012] Preferably, the step of fine grinding the outer circle of the sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter includes: using structural tooling to position the sector plate and the pyramid sleeve to achieve overall mounting of the roll; detecting the outer diameter of the sector plate, and fine grinding the outer circle of the positioned sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter.

[0013] Preferably, the step of fine grinding the outer circle of the positioned sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter includes: performing a first grinding on the outer circle of the positioned sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter; after the first grinding is completed, leaving a preset allowance, loosening the structural fixture to allow each sector plate to be in a free state; after standing for a preset time, re-clamping the drum with the structural fixture and performing a second grinding, so that the outer diameter of the sector plate is the preset outer diameter.

[0014] Preferably, after obtaining the finely ground sector plate, the method further includes: after the sector plate is assembled, detecting the circular runout of the outer circle of the sector plate and detecting the roundness value of the outer circle of the sector plate; if either value is found to be unsatisfactory, adjusting the copper sliding plate at the end of the corresponding sector plate according to the detection result, so that the circular runout of the outer circle of the sector plate and the roundness value of the outer circle of the sector plate both satisfy the preset conditions.

[0015] Preferably, the preset conditions include: the outer arc of the sector plate is high in the middle and low on both sides, and the distribution of the high position in the middle of the sector plate accounts for 60% to 80% of the entire outer arc; the circular runout of the outer circle at the high position is less than or equal to 0.2 mm; and the difference between the roundness value of the outer circle at the high position and the target roundness value is less than or equal to 0.2 mm.

[0016] Preferably, the detection of the roundness value of the outer circle of the sector plate includes: selecting multiple observation positions on the outer surface of the sector plate; for each observation point, taking two ends in the vertical direction and two ends in the horizontal direction at the corresponding section of the roll, and obtaining the difference between the outer diameter value in the vertical direction and the outer diameter value in the horizontal direction; and detecting the roundness value of the outer circle of the sector plate based on the absolute value of the difference.

[0017] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0018] The roll provided in this embodiment of the invention repairs the sliding surfaces of the sector plate and the pyramid sleeve, increasing the contact area between them and standardizing the sliding gap between them. This makes the shape of the sleeve more suitable for the winding environment. By improving the shape and control accuracy of the roll, a roll repair accuracy control standard that suppresses winding layering faults is obtained, improving the shaking problem during unwinding caused by the roll shape and structure, thereby suppressing winding layering faults and improving production accuracy. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the sector plate and the pyramid sleeve in an embodiment of the present invention;

[0021] Figure 2 This is a flowchart of the method for improving the control of coil layer faults in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structural tooling in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the copper sliding plate at the end of the fan-shaped plate in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the sector plate in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the distribution structure of the test ring in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the observation point in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure for testing the circular runout of the roll in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure for testing the roundness value of the roll in an embodiment of the present invention.

[0029] Figure label:

[0030] Mandrel 101; pyramidal sleeve 102; sector plate 103; copper liner 104; copper slide plate 105; first retaining ring 201; first positioning sleeve 202; second positioning sleeve 203; second retaining ring 204; third positioning sleeve 205; fourth positioning sleeve 206; third retaining ring 207; retaining plate 208; set screw 209; tooling shaft 210. Detailed Implementation

[0031] Through extensive on-site experimental data comparison and analysis, the inventors discovered that the key to suppressing stacking faults lies in improving the vibration during uncoiling. Furthermore, improving strip vibration during uncoiling hinges on enhancing the morphology and control precision of the uncoiler drum. After the steel coil is uncoiled, significant vibration exists between the uncoiler and the initial pinch roll. Even after passing the initial pinch roll, the vibration cannot be completely eliminated, affecting the edge-cutting stability of the subsequent disc shear and ultimately impacting stacking faults after coiling. However, there is limited research in the industry on the relationship between uncoiling vibration and stacking faults, the causes of uncoiling vibration, and methods for suppressing it. Furthermore, there is insufficient exploration of the control standards for uncoiler drum repair precision and the balance between corresponding control methods and required costs (excessively raising precision control standards would significantly increase repair difficulty, time, and cost). No mature solutions are readily available for reference.

[0032] In view of this, the embodiments of this application provide a roll and a control method for improving winding layer misalignment, which adjusts the shape and control accuracy of the uncoiler roll, improves the shaking during unwinding by modifying the roll structure, thereby optimizing the winding layer misalignment problem of the uncoiler and improving production accuracy.

[0033] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0034] A reel includes: a sector plate, a pyramid sleeve, and a copper liner disposed between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, wherein the copper liner is fixedly connected to the sliding surface of the sector plate; the contact area between the copper liner and the sliding surface of the pyramid sleeve is not less than 80%, and the maximum sliding gap between the copper liner and the sliding surface of the pyramid sleeve is between 0 and 0.05 mm.

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] In a first aspect, an embodiment of the present invention provides a reel, such as... Figure 1 As shown, it includes: a sector plate 103, a pyramid sleeve 102, and a copper backing plate 104 disposed between the sliding surface (wedge-shaped surface) of the sector plate 103 and the sliding surface (wedge-shaped surface) of the pyramid sleeve 102. The copper backing plate 104 is fixedly connected to the sliding surface of the sector plate 103. The contact area between the copper backing plate 104 and the sliding surface of the pyramid sleeve 102 is not less than 80%, and the maximum sliding gap between the copper backing plate 104 and the sliding surface of the pyramid sleeve 102 is between 0 and 0.05 mm.

[0037] To facilitate understanding, the structure of the reel is briefly described below with reference to the accompanying drawings. The uncoiler in this application includes a reel, such as... Figure 1As shown, the drum includes: a mandrel 101, a pyramidal sleeve 102, and multiple sector plates 103, as well as a copper liner 104 disposed between the sliding surface (wedge-shaped surface) of the sector plate 103 and the sliding surface (wedge-shaped surface) of the pyramidal sleeve 102. The mandrel 101 is disposed in the pyramidal sleeve 102, and there is a gap between the mandrel 101 and the sector plate 103. The sliding surface of the sector plate 103 is slidably connected to the sliding surface of the pyramidal sleeve 102. A portion of the sliding surface of the sector plate 103 is also fixedly connected to the copper liner 104. The copper liner 104 is slidably connected to the sliding surface of the pyramidal sleeve 102. The outer circle of the sector plate 103 serves as the outer circle of the entire drum.

[0038] In a specific embodiment, by grinding the copper backing plate between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, for example, the copper backing plate is made of aluminum bronze, to ensure that the contact area between the copper backing plate, which is fixedly connected to the sliding surface of the sector plate, and the sliding surface of the pyramid sleeve is not less than 80%.

[0039] Next, controlling the maximum sliding clearance between the copper backing plate and the sliding surface of the pyramid sleeve to be between 0 and 0.05 mm includes: with the sector plate in its natural state, measuring the outer diameter of the sector plate with a dial indicator to obtain the first outer diameter, then clamping the sector plate with a clamping fixture, measuring the outer diameter of the sector plate with a dial indicator to obtain the second outer diameter; and controlling the maximum sliding clearance between the copper backing plate and the sliding surface of the pyramid sleeve to be between 0 and 0.05 mm based on the difference between the first and second outer diameters.

[0040] The difference between the first outer diameter and the second outer diameter is the sliding clearance. Grinding the copper liner can effectively improve the difference between the first outer diameter and the second outer diameter.

[0041] Specifically, the clamping fixture may include a chain hoist and a clamping device. The chain hoist and clamping device are used to clamp the sector plates. Before clamping, the clearance of each sector plate at the bottom (6 o'clock position) is checked with a dial indicator. After clamping, the clearance of each sector plate at the bottom is checked again to ensure that the maximum sliding clearance between the copper backing plate and the sliding surface of the pyramid sleeve is controlled between 0 and 0.05 mm (excluding the endpoints).

[0042] In a specific embodiment, the outer radius of the sector plate can be higher in the middle and lower on both sides, with the higher position in the middle of the sector plate accounting for 60% to 80% of the total outer radius; the circular runout of the outer circle at the higher position is less than or equal to 0.2 mm, and the difference between the roundness value of the outer circle at the higher position and the target roundness value is less than or equal to 0.2 mm. This morphology can effectively improve the strip vibration problem during uncoiling and suppress winding layer misalignment.

[0043] Secondly, the present invention provides a method for improving the control of winding layer misalignment, wherein the uncoiler includes the winding drum described in the first aspect above, specifically, as follows: Figure 2 As shown, the method includes the following steps S101 to S102:

[0044] Step S101: In the event of a winding layer misalignment in the uncoiler, perform the following shape repair steps on the uncoiler drum:

[0045] Step S102: Grind the copper backing plate between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, so that the contact area between the copper backing plate, which is fixedly connected to the sliding surface of the sector plate, and the sliding surface of the pyramid sleeve is not less than 80%, and control the maximum sliding gap between the copper backing plate and the sliding surface of the pyramid sleeve to be within a preset distance.

[0046] In one embodiment, in order to quickly determine the source of the winding layering problem, if there is a winding layering problem in the uncoiler, the shape of the uncoiler drum can be inspected first. If the inspection result does not meet the preset conditions, the shape repair step is performed on the uncoiler drum.

[0047] The shape repair steps also include: grinding the sliding surfaces of the copper backing plate, the sector plate, and the pyramid sleeve to a preset thickness, and expanding the outer diameter of the sector plate based on the preset thickness to restore the outer diameter of the sector plate. The sliding surface of the sector plate is the sliding surface of the copper backing plate that is not fixedly connected.

[0048] The preset thickness can be between 0.5mm and 0.6mm.

[0049] In a specific embodiment, expanding the outer diameter of the sector plate based on a preset thickness may include: calculating the height reduction of the ground sector plate in the diameter direction based on the tilt angle of the sliding surface of the pyramid sleeve and the preset thickness; determining the displacement that the pyramid sleeve and the roll mandrel need to move based on the height reduction; and controlling the displacement of the pyramid sleeve and the roll mandrel in the direction of the copper slide plate at the end of the sector plate to expand the outer diameter of the sector plate.

[0050] It should be noted that the copper sliding plate at the end of the sector plate is only located on one end face of the sector plate. The movement direction of the pyramid sleeve and the reel spindle can be determined according to the position of the copper sliding plate. For example, in one application scenario, the copper sliding plate is located to the left of the sector plate, and the pyramid sleeve and the reel spindle move to the left.

[0051] Specifically, since the sliding surfaces of the copper liner, the sector plate, and the pyramid sleeve are all worn, based on the degree of wear and empirical values, it is generally necessary to grind off 0.5mm from each of the two sliding surfaces to remove scratches. This is to ensure that the true circular outer diameter of the drum remains unchanged (e.g., outer diameter is...). Based on the tilt angle α = 10°, the displacement is determined as follows:

[0052] Based on the inclination angle of the sliding surface and the preset thickness, the height reduction h of the sector plate in the diameter direction is calculated:

[0053] h=(2×0.5) / cos a=(2×0.5) / cos10°

[0054] In order to restore the outer diameter of the sector plate to The required displacement S to the left is obtained:

[0055] S = h / tan a

[0056] = (2 × 0.5) / (tan10cos10°)

[0057] =1 / sin10° = 5.74mm

[0058] The displacement S is calculated to be 5.74 mm. Figure 1 As shown, the positioning dimension D before optimization is 90, and the positioning dimension D after optimization is: 90-5.74=84.26mm.

[0059] like Figure 1 As shown, the wedge-shaped surface of each sector plate 103 engages with four sets of wedge-shaped surfaces evenly distributed along the circumference on the pyramid sleeve 102. Taking the upper sector plate and pyramid sleeve as an example, by controlling the pyramid sleeve to move 5.74mm to the left (copper slide plate direction), since the sliding surface of the pyramid sleeve and the sliding surface of the sector plate are in a sliding connection, when the pyramid sleeve is controlled to move to the left, the sliding surface of the upper sector plate corresponding to the sliding surface of the pyramid sleeve will be driven to move upward. The lower sector plate is the same as the pyramid sleeve, thereby expanding the outer diameter of the sector plate.

[0060] Based on the measured outer diameter of the sector plate and the preset target outer diameter, the outer circle of the sector plate is precision ground to obtain the precision-ground sector plate.

[0061] In a specific embodiment, the outer circle of the sector plate is finely ground according to the measured outer diameter of the restored sector plate and the preset target outer diameter. This may include: using structural tooling to position the sector plate and the pyramid sleeve to achieve overall mounting of the roll; detecting the outer diameter of the sector plate, and finely grinding the outer circle of the positioned sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter.

[0062] The structural fixture may include a first positioning component, a second positioning component, and a third positioning component. The first positioning component is used to position one end of the pyramid sleeve, the second positioning component is used to position the other end of the pyramid sleeve, and the third positioning component is used to position one end of the sector plate.

[0063] like Figure 3As shown, the first positioning component may include: a first retaining ring 201, a first positioning sleeve 202 and a second positioning sleeve 203. The first retaining ring 201 is sleeved on the periphery of the mandrel through a positioning groove. The first retaining ring 201 is located near one end face of the pyramidal sleeve. The first positioning sleeve 202 and the second positioning sleeve 203 each include a first sub-positioning block and a second sub-positioning block that are integrally connected.

[0064] The first sub-positioning block of the first positioning sleeve 202 is located between the pyramidal sleeve and the mandrel, and the second sub-positioning block of the first positioning sleeve 202 is located between the first retaining ring and one end face of the upper pyramidal sleeve; the first sub-positioning block of the second positioning sleeve 203 is located between the pyramidal sleeve and the mandrel, and the second sub-positioning block of the second positioning sleeve 203 is located between the first retaining ring and one end face of the lower pyramidal sleeve.

[0065] Similarly, the second positioning component may include: a second retaining ring 204, a third positioning sleeve 205 and a fourth positioning sleeve 206. The second retaining ring 204 is sleeved on the periphery of the mandrel through a positioning groove. The second retaining ring 204 is located near the other end face of the pyramidal sleeve. The third positioning sleeve 205 and the fourth positioning sleeve 206 each include an integrally connected first sub-positioning block and a second sub-positioning block.

[0066] The first sub-positioning block of the third positioning sleeve 205 is located between the pyramidal sleeve and the mandrel, and the second sub-positioning block of the third positioning sleeve 205 is located between the first retaining ring and the other end face of the upper pyramidal sleeve; the first sub-positioning block of the fourth positioning sleeve 206 is located between the pyramidal sleeve and the mandrel, and the second sub-positioning block of the fourth positioning sleeve 206 is located between the first retaining ring and the other end face of the lower pyramidal sleeve.

[0067] The third positioning component includes a third retaining ring 207, a retaining plate 208, and a set screw 209. The third retaining ring 207 is sleeved on the outer periphery of the mandrel through a positioning groove. The third retaining ring 207 is positioned close to the copper sliding plate on the end face of the sector plate. The retaining plate 208 is sleeved on the outer periphery of the mandrel and is located between the third retaining ring 207 and the copper sliding plate on the end face of the sector plate. The retaining plate 208 is also fixed to the end face of the sector plate by the set screw 209 for positioning the sector plate.

[0068] Specifically, such as Figure 3 As shown, the pyramidal sleeve and sector plate are fixed on the tooling shaft 210 to simulate the structure of a real drum. The tooling shaft is custom-machined according to the dimensions of the drum's intermediate shaft to ensure dimensional consistency. Considering that grinding machines in general processing plants cannot perform overall clamping and grinding of the drum, a structural tooling is designed to assist in grinding the outer circle of the sector plate. Fine grinding: The right end of the pyramid sleeve is positioned using the first retaining ring (with a positioning groove on the tooling shaft) and the positioning sleeve; the left end of the pyramid sleeve is positioned using the second retaining ring (with a positioning groove on the tooling shaft) and the positioning sleeve; the sector plate is positioned using the retaining plate, the set screw, and the third retaining ring (with a positioning groove on the tooling shaft). These measures ensure that the outer diameter of the sector plate, after fine grinding, has the same accuracy as the outer diameter of the original drum after assembly.

[0069] In a specific embodiment, the outer circle of the positioned sector plate is finely ground according to the measured outer diameter of the sector plate and the preset target outer diameter. This may include: grinding the outer circle of the positioned sector plate for the first time according to the measured outer diameter of the sector plate and the preset target outer diameter; after the first grinding is completed, leaving a preset allowance, loosening the structural fixture to allow each sector plate to be in a free state, letting it stand for a preset time, and then re-clamping the roll with the structural fixture to perform a second grinding, so that the outer diameter of the sector plate is the preset outer diameter.

[0070] First, the outer diameter of the sector plate is measured using a measuring instrument (e.g., an outside micrometer). Then, based on the measured outer diameter of the sector plate and the preset target outer diameter (e.g., ...), ... The difference between the two values ​​determines the thickness that needs to be ground.

[0071] The preset allowance can be 0.2mm, and the preset duration can be 160-170 hours, for example, a preset duration of 168 hours. The preset outer diameter is the desired target outer diameter.

[0072] Specifically, the fine grinding process of the outer diameter of the sector plate is carried out in two steps. After the first grinding is completed, a 0.2mm allowance is left, the fixture is loosened, and each sector plate is placed in a free state and left to stand for 168 hours or in a stress-relieving furnace to release internal stress and deformation. After reclamping, it is finely ground again to the preset outer diameter size to control the deformation of the sector plate to a minimum, further ensuring that the outer diameter accuracy is consistent with that of the original roll after assembly.

[0073] In one example, to eliminate defects on the outer surface of the sector plate, after fine grinding the outer circle of the positioned sector plate, the process may further include: controlling the sector plate 103 to move away from the copper slide plate 105 by adjusting the set screw 209, causing the sleeve to expand under the action of the wedge surface, and then grinding away the scratches and fatigue layer on the outer circle of the sector plate 103 to achieve fine grinding of the outer circle of the sector plate 103. The size of the expansion is determined according to the dimension to be ground, and the position of the set screw 209 is as follows: Figure 3 As shown.

[0074] Because the set screw 209 controls the change in the position of the sector plate 103, the distance between the end face of the sector plate 103 and the end face of the pyramid sleeve 102 (i.e., Figure 4The positioning dimension D shown has changed. Therefore, after the outer circle of the sector plate 103 is precision ground, the positioning dimension D needs to be recalculated to obtain a new positioning dimension. When the sleeve is removed from the tooling for assembly, it needs to be installed based on the newly measured positioning dimension to achieve precise assembly.

[0075] To check whether the outer circle of the finely adjusted sector plate meets the standard requirements, the roundness value and circular runout of the outer circle of the sector plate can be tested after the finely adjusted sector plate is obtained. If the roundness value and / or circular runout do not meet the requirements, targeted grinding can be performed based on the abnormal values.

[0076] Furthermore, to control the dimensional accuracy after the roll assembly, after obtaining the finely ground sector plate, the process may further include: after the sector plate assembly is completed, detecting the circular runout of the sector plate's outer circle and detecting the roundness value of the sector plate's outer circle; if either value is found to be unsatisfactory, adjusting the corresponding copper sliding plate at the end of the sector plate according to the detection result, so that both the circular runout of the sector plate's outer circle and the roundness value of the sector plate's outer circle meet the preset conditions. Figure 4 The image shown is a magnified view of a portion of the copper sliding plate 105.

[0077] It should be noted that after the outer diameter of the sector plate is precision ground on the tooling shaft, each sector plate and the pyramid sleeve need to be assembled on the mandrel. Because the sector plate undergoes thermal deformation during machining, the drum needs to be finely adjusted after assembly to better control the radial runout of the sector plate's outer diameter. Individual fine-tuning of each sector plate ensures that the outer arc of each sector plate is distributed on the same circumference. Fine-tuning the copper sliding plates at the ends of each sector plate ensures that the runout and surface morphology of each sector plate meet the drum's precision control standards.

[0078] The preset conditions can be that the outer radius of the sector plate is higher in the middle and lower at both ends, with the higher points accounting for 60% to 80% of the total outer radius in the middle of the sector plate, the circular runout of the outer circle at the higher points being less than or equal to 0.2 mm, and the difference between the roundness value of the outer circle at the higher points and the target roundness value being less than or equal to 0.2 mm. The target roundness value is the preset roundness value to be achieved.

[0079] Specifically, the control standards for drum precision are: the roundness error of the drum in a 510mm perfect circle state is ≤0.2mm, and the circular runout of the mandrel in a 510mm perfect circle state is ≤0.2mm; ensuring that the mandrel's sector plate has a shape characteristic of being high in the middle and low on both sides, with the highest point evenly distributed within a range of not less than 60% of the middle of the sector plate. Figure 5As shown, considering the rounded treatment to prevent stress concentration at the edges, the range of high points is generally taken as 60%≤α≤80%. For example, the distance between the center of the outer arc of the fan-shaped plate and the high point is 255mm, and the distance between the center and the low point is 250mm.

[0080] In a specific embodiment, detecting the roundness value of the outer circle of the sector plate may include: selecting multiple observation positions on the outer surface of the sector plate; for each observation point, taking the two ends in the vertical direction and the two ends in the horizontal direction at the corresponding section of the roll, and obtaining the difference between the outer diameter value in the vertical direction and the outer diameter value in the horizontal direction; and detecting the roundness value of the outer circle of the sector plate based on the absolute value of the difference.

[0081] Optionally, selecting multiple observation points on the outer surface of the sector plate may include selecting multiple observation points at high points on the outer surface of the sector plate.

[0082] Since the maximum expansion position of the uncoiler drum is not a true circle, before testing, multiple test rings with equal inner diameters are fitted onto the outer surface of the sector plate (the test ring structure is as follows). Figure 6 As shown, the hydraulic device is started to control the expansion of the drum. During the expansion process, the absolute value of the perpendicularity between the test ring and the drum axis is adjusted to be less than or equal to 0.1 mm to obtain the expanded drum. The outer diameter of the expanded drum is equal to the inner diameter of the test ring.

[0083] In one embodiment, such as Figure 7 , Figure 8 As shown, for each observation point, two endpoints are taken in the vertical direction and two endpoints in the horizontal direction at the corresponding drum cross-section. The difference between the vertical outer diameter value and the horizontal outer diameter value is obtained. This can include: for each observation point, two endpoints are taken in the vertical direction and two endpoints in the horizontal direction at the corresponding drum cross-section. The drum is rotated, and the circular runout of the drum is detected at each observation point using a dial indicator. The data distribution at each observation point is recorded. Based on the data distribution and the two endpoints in the vertical direction, the outer diameter value in the vertical direction is obtained, and based on the data distribution and the two endpoints in the horizontal direction, the outer diameter value in the horizontal direction is obtained. The difference between the vertical outer diameter value and the horizontal outer diameter value is then calculated.

[0084] Specifically, three test rings are fitted over the outside of the drum, with equal distances between adjacent test rings. The distance between the test rings on both sides and the end face of the drum is between 150 and 200 mm. The position and distribution of the test rings are as follows: Figure 6 As shown. Start the hydraulic system to control the expansion of the drum. Use a dial indicator to check and adjust the absolute value of the perpendicularity between the test ring and the drum axis to ≤0.1mm, so that the test ring and the drum are perpendicular to each other, reducing the expansion error.

[0085] Select four observation points near the test rings. For example, the first and second observation points are located between the left and middle test rings, and the third and fourth observation points are located between the right and middle test rings. Figure 7 As shown, there are four locations from the first observation point to the fourth observation point ①~④. At each location, the middle of the two sector plates in the vertical direction AC and the middle of the two sector plates in the horizontal direction BD are taken. The outer diameter is measured using an outside micrometer to obtain the difference S1 between the outer diameters of AC and BD. It is then determined whether the absolute value of S1 is ≤0.2mm.

[0086] In a specific embodiment, such as Figure 9 As shown, detecting the circular runout of a sector plate can include: rotating the roller, using a dial indicator to detect the circular runout of the roller at each observation point, and recording the data distribution at each observation point; based on the data distribution, detecting the circular runout of the sector plate.

[0087] Specifically, the drum is slowly rotated, and a dial indicator is used to detect the circular runout at the four positions shown in ① to ④ above, recording the data distribution. Based on the data distribution, the roundness value of the sector plate is checked to see if it is ≤0.2mm. It should be noted that, to avoid interference from data at the lower points on both sides, the recorded data distribution can be taken only from the middle 80% area of ​​each sector plate. Furthermore, using the aforementioned test ring to fix the drum before testing the circular runout allows for obtaining the circular runout of a drum with the target outer diameter, reducing errors and improving detection accuracy.

[0088] Of course, as other alternative embodiments, the number of test rings can also be 2, 4, 5, etc., and the number of observation points can be 2, 3, 5, etc., which are not limited in this application.

[0089] Furthermore, in order to ensure that the drum meets the control standards and improve the accuracy of the drum, after adjusting the copper sliding plate at the end of the corresponding sector plate according to the test results, the process may further include: performing a shape repair step on the drum again, so that the circular runout of the outer circle of the sector plate and the roundness value of the outer circle of the sector plate both meet the preset conditions.

[0090] Therefore, the problem of winding misalignment is improved by repairing the shape of the roll. In the roll repair process, the sliding surfaces of the sector plate and the pyramid sleeve are repaired first to increase the contact area between them and standardize the sliding gap between them, which helps to initially improve the control accuracy of the roll. Then, the scratches on the sliding surfaces of the copper liner, sector plate, and pyramid sleeve are ground off. Based on the inherent structure of the sliding connection between the sliding surfaces of the sector plate and the pyramid sleeve, the outer diameter of the sector plate is expanded to compensate for the outer diameter, thereby restoring the true circular outer diameter of the rolled roll after grinding to the value of the true circular outer diameter of the rolled roll before grinding. Then, the outer circle of the sector plate is finely ground to obtain the finely ground sector plate, thus restoring the appearance and control accuracy of the roll. The repaired roll is used in the unwinding machine, which can better avoid the shaking problem caused by poor roll appearance accuracy, thereby improving winding misalignment and increasing production accuracy.

[0091] In summary, the method for improving coil layer misalignment control provided by the embodiments of the present invention, by improving the roll morphology and performing precision detection control, can effectively improve the running stability of strip steel after uncoiling and improve the problem of excessive layer misalignment value of steel coils coming off the finishing and recoiling unit after repairing the roll and applying it on site.

[0092] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0093] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for improving the control of coil layer faults, characterized in that, An application is made in an uncoiler, the uncoiler including a drum, the drum including a sector plate, a pyramidal sleeve, and a copper liner plate disposed between the sliding surface of the sector plate and the sliding surface of the pyramidal sleeve, the copper liner plate being fixedly connected to the sliding surface of the sector plate, the method including: In the event of a winding layer misalignment in the uncoiler, the following shape repair steps should be performed on the uncoiler drum: Grind the copper backing plate so that the contact area between the copper backing plate, which is fixedly connected to the sliding surface of the sector plate, and the sliding surface of the pyramid sleeve is not less than 80%, and control the maximum sliding gap between the copper backing plate and the sliding surface of the pyramid sleeve to be between 0 and 0.05 mm. The shape repair step further includes: adjusting the outer circle state of the fan-shaped plate to meet preset conditions, the preset conditions including: the outer circle arc of the fan-shaped plate is in a state of being high in the middle and low on both sides, and the distribution of the high position in the middle of the fan-shaped plate accounts for 60% to 80% of the entire outer circle arc, the circular runout of the outer circle at the high position is less than or equal to 0.2mm, and the difference between the roundness value of the outer circle at the high position and the target roundness value is less than or equal to 0.2mm of the target roundness value; The adjustment of the outer circle state of the sector plate to meet the preset conditions includes: grinding the copper backing plate, the sliding surface of the sector plate, and the sliding surface of the pyramid sleeve to a preset thickness, and expanding the outer diameter of the sector plate based on the preset thickness to restore the outer diameter of the sector plate, wherein the sliding surface of the sector plate is the sliding surface that is not fixedly connected to the copper backing plate; and fine grinding the outer circle of the sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter to obtain a finely ground sector plate so that the outer circle state of the sector plate meets the preset conditions. The step of expanding the outer diameter of the sector plate based on the preset thickness includes: calculating the height reduction of the sector plate in the diameter direction after grinding based on the inclination angle of the sliding surface of the pyramid sleeve and the preset thickness; determining the displacement that the pyramid sleeve needs to move according to the height reduction; and controlling the pyramid sleeve to move the displacement towards the copper sliding plate at the end of the sector plate to expand the outer diameter of the sector plate.

2. The method as described in claim 1, characterized in that, The step of precision grinding the outer circle of the sector plate according to the measured outer diameter and the preset target outer diameter includes: Structural tooling is used to position the sector plate and the pyramid sleeve, thereby achieving overall clamping of the drum; The outer diameter of the sector plate is detected, and the outer circle of the positioned sector plate is precision ground according to the measured outer diameter of the sector plate and the preset target outer diameter.

3. The method as described in claim 2, characterized in that, The step of precision grinding the outer circle of the positioned sector plate according to the measured outer diameter and the preset target outer diameter includes: Based on the measured outer diameter of the sector plate and the preset target outer diameter, the outer circle of the positioned sector plate is ground for the first time. After the first grinding is completed, a preset allowance is left, the structural fixture is loosened, and each sector plate is placed in a free state. After a preset time, the structural fixture is used to re-clamp the drum and perform a second grinding, so that the outer diameter of the sector plate is the preset outer diameter.

4. The method as described in claim 1, characterized in that, After obtaining the finely ground sector plate, the process further includes: After the sector plate is assembled, the circular runout of the outer circle of the sector plate and the roundness value of the outer circle of the sector plate are detected. If any of the detected values ​​does not meet the preset conditions, the copper sliding plate at the end of the corresponding sector plate is adjusted according to the detection result so that the circular runout of the outer circle of the sector plate and the roundness value of the outer circle of the sector plate both meet the preset conditions.

5. The method as described in claim 4, characterized in that, The detection of the roundness value of the outer circle of the sector plate includes: Multiple observation points were selected on the outer surface of the sector plate; For each observation point, take the two ends in the vertical direction and the two ends in the horizontal direction at the corresponding section of the drum to obtain the difference between the outer diameter value in the vertical direction and the outer diameter value in the horizontal direction. Based on the absolute value of the difference, the roundness value of the outer circle of the sector plate is detected.

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