Winding drum and control method for improving winding fault

Abstract

The invention discloses a winding drum and a control method for improving winding fault, the winding drum comprises a sector plate, a pyramid sleeve and a copper lining plate arranged between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, and 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 0-0.05 mm. The morphology structure of the winding drum can greatly improve the shaking problem in the uncoiling process, and winding layer faults are effectively restrained.

Description

Technical Field

[0001] The present invention relates to the technical field of rewinding unit production, in particular to a reel and a control method for improving winding stacking faults. Background Art

[0002] Coiling faults occur when the ends of each layer of steel strip, after being coiled on the coiler, are not flush, with individual or multiple layers exhibiting noticeable protrusions or depressions. Continuous misalignment of multiple layers is also known as towering, while discontinuous misalignment of single or individual layers is defined as faulting. When faults exceed a certain standard, finished electrical steel coils can affect subsequent packaging and handling, significantly impacting downstream customers' slitting, punching, and other processes.

[0003] Existing domestic recoiling lines address the issue of stacking faults by focusing on edge position control (EPC) / automatic strip center position control (CPC) detection, tension control, and process optimization. Actual results are often measured in millimeters, while downstream electrical steel customers typically require stacking faults of less than 1mm, and the internal control target for electrical steel production is generally 0.6mm. Finishing lines are short and equipment is concentrated (approximately 16 meters between the uncoiler and coiler), resulting in significant cross-influence between various equipment. Consequently, actual stacking fault control has been poor, and the percentage of companies achieving internal control targets is low. Summary of the Invention

[0004] The embodiment of the present application provides a roll and a control method for improving winding stacking faults, repairs the defects of the uncoiler roll, improves the roll shape and control accuracy, greatly improves the jitter during unwinding, and further optimizes the problem of winding stacking faults of the uncoiler, thereby improving production accuracy.

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

[0006] A reel comprises: a sector plate, a pyramid sleeve, and a copper lining plate arranged between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, wherein the copper lining plate is fixedly connected to 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 clearance between the copper lining plate and the sliding surface of the pyramid sleeve is between 0 and 0.05 mm.

[0007] Preferably, the outer circle curvature of the fan-shaped plate is 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 curvature; 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.

[0008] In a second aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0009] A control method for improving winding stacking faults, the uncoiler including the drum described in the first aspect, the method comprising: in the event of a winding stacking fault in the uncoiler, performing the following appearance repair steps on the uncoiler drum: grinding the copper lining between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve so that the contact area between the copper lining 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 lining and the sliding surface of the pyramid sleeve to be between 0 and 0.05 mm.

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

[0011] Preferably, the 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 amount that the pyramid sleeve needs to move according to the height reduction amount; controlling the pyramid sleeve to move the displacement amount toward the copper slide plate at the end of the sector plate to expand the outer diameter of the sector plate.

[0012] Preferably, the outer circle of the fan-shaped plate is fine-ground according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter, including: positioning the fan-shaped plate and the pyramid sleeve by using structural tooling to achieve overall clamping of the reel; detecting the outer diameter of the fan-shaped plate, and fine-grinding the outer circle of the positioned fan-shaped plate according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter.

[0013] Preferably, the outer circle of the positioned fan-shaped plate is finely ground according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter, including: according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter, the outer circle of the positioned fan-shaped plate is ground for the first time, after the first grinding is completed, a preset margin is left, the structural tooling is loosened, so that each fan-shaped plate is in a free state, after standing for a preset period of time, the reel is re-clamped using the structural tooling, and a second grinding is performed to make the outer diameter of the fan-shaped plate the preset outer diameter.

[0014] Preferably, after obtaining the finely ground fan-shaped plate, it also includes: after the fan-shaped plate is assembled, detecting the circular runout of the outer circle of the fan-shaped plate and detecting the roundness value of the outer circle of the fan-shaped plate; if it is detected that any of the values ​​does not meet the preset conditions, adjusting the copper slide plate at the corresponding end of the fan-shaped plate according to the detection result, so that the circular runout of the outer circle of the fan-shaped plate and the roundness value of the outer circle of the fan-shaped plate both meet the preset conditions.

[0015] Preferably, the preset conditions include: the outer circle curvature of the fan-shaped plate is 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 curvature, the circular runout of the outer circle of the high position is less than or equal to 0.2 mm, and the difference between the roundness value of the outer circle of the high position and the target roundness value is less than or equal to 0.2 mm.

[0016] Preferably, the detecting of the roundness value of the outer circle of the fan-shaped plate includes: selecting a plurality of observation positions on the outer surface of the fan-shaped plate; for each observation point, taking two end points in the vertical direction and two end points in the horizontal direction of the roll cross section corresponding to the observation point, and obtaining 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, detecting the roundness value of the outer circle of the fan-shaped plate.

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

[0018] The reel provided in the embodiment of the present invention repairs the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, increases the contact area between the two, and standardizes the sliding gap between the two, so that the morphology of the sleeve is more suitable for the winding environment. By improving the morphology and control accuracy of the reel, a reel repair accuracy control standard that suppresses winding faults is obtained, which improves the jitter problem during unwinding caused by the reel morphology structure, thereby suppressing winding faults and improving production accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0021] Figure 2 Flowchart of a control method for improving winding stacking faults according to an embodiment of the present invention;

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

[0023] Figure 4 Schematic diagram of the structure of the copper slide plate at the end of the sector plate in an embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the fan-shaped plate in an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the distribution structure of the test ring in an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the structure of the observation point in the embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the structure of the test drum circular runout in an embodiment of the present invention;

[0028] Figure 9 Schematic diagram of the structure of the test roll roundness value in an embodiment of the present invention.

[0029] Reference numerals:

[0030] Mandrel 101; pyramid sleeve 102; sector plate 103; copper lining plate 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; top screw 209; tooling shaft 210. DETAILED DESCRIPTION

[0031] Through the comparison and analysis of a large amount of on-site experimental data, the inventor found that the key to suppressing stacking faults is to improve the jitter during unwinding, and the key to improving the jitter of the strip during unwinding is to improve the morphology and control accuracy of the unwinder drum. After the steel coil is unwound by the uncoiler, there is an obvious jitter phenomenon between the uncoiler and the head pinch roller. After passing through the head pinch roller, the jitter of the strip cannot be completely eliminated, which in turn affects the stability of the subsequent cutting edge of the disc shear, and ultimately affects the stacking faults after coiling. However, there is little research in the industry on the relationship between unwinding jitter and stacking faults, the causes of unwinding jitter, and the suppression methods. There is also insufficient exploration of the control standards for the repair accuracy of the uncoiler drum and the balance between the corresponding control means and the required costs (excessive improvement of the precision control standards will greatly increase the difficulty, time and cost of repair). There are no mature solutions for reference.

[0032] In view of this, the embodiment of the present application provides a roll and a control method for improving winding faults, regulates the morphology and control accuracy of the uncoiler roll, improves the jitter during unwinding by correcting the roll structure, and thus optimizes the problem of winding faults of the uncoiler and improves production accuracy.

[0033] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0034] A reel comprises: a sector plate, a pyramid sleeve, and a copper lining plate arranged between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, wherein the copper lining plate is fixedly connected to 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 clearance between the copper lining plate and the sliding surface of the pyramid sleeve is between 0 and 0.05 mm.

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to 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 lining plate 104 arranged between the sliding surface (wedge surface) of the sector plate 103 and the sliding surface (wedge surface) of the pyramid sleeve 102, and the copper lining plate 104 is fixedly connected to the sliding surface of the sector plate 103; the contact area between the copper lining plate 104 and the sliding surface of the pyramid sleeve 102 is not less than 80%, and the maximum sliding clearance between the copper lining plate 104 and the sliding surface of the pyramid sleeve 102 is between 0 and 0.05 mm.

[0037] For ease of 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 reel includes: a core shaft 101, a pyramid sleeve 102, a plurality of sector plates 103, and a copper lining 104 arranged between the sliding surface (wedge surface) of the sector plate 103 and the sliding surface (wedge surface) of the pyramid sleeve 102. The core shaft 101 is arranged in the pyramid sleeve 102, and there is a gap between the core shaft 101. The sliding surface of the sector plate 103 is slidably connected with the sliding surface of the pyramid sleeve 102. Part of the sliding surface of the sector plate 103 is also fixedly connected to the copper lining 104. The copper lining 104 is slidably connected with the sliding surface of the pyramid sleeve 102. The outer circle of the sector plate 103 serves as the outer circle of the entire reel.

[0038] In a specific embodiment, by grinding the copper lining between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, for example, the copper lining is made of aluminum bronze, ensuring that the contact area between the copper lining 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, the maximum sliding clearance between the copper lining plate and the sliding surface of the pyramid sleeve is controlled to be between 0 and 0.05 mm, including: when the sector plate is in a natural state, the outer diameter of the sector plate is detected by a dial indicator to obtain a first outer diameter, and then the sector plate is clamped by a clamping fixture, and the outer diameter of the sector plate is detected by a dial indicator to obtain a second outer diameter; according to the difference between the first outer diameter and the second outer diameter, the maximum sliding clearance between the copper lining plate and the sliding surface of the pyramid sleeve is controlled to be between 0 and 0.05 mm.

[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 tooling may include: a fall chain and a clamp, which are used in conjunction with the fall chain to clamp the sector plate. Before clamping, the active clearance of each sector plate at the bottom (6 o'clock position) is detected by a dial indicator. After clamping, the active clearance of each sector plate at the bottom is detected again, so that the maximum sliding clearance between the copper lining plate and the sliding surface of the pyramid sleeve is controlled between 0 and 0.05 mm (excluding the end points).

[0042] In a specific embodiment, the outer curvature of the sector plate can be higher in the middle and lower on both sides, with the highest point in the middle of the sector plate accounting for 60% to 80% of the total outer curvature. The circular runout of the outer circle at the highest point is less than or equal to 0.2 mm, and the difference between the roundness value of the outer circle at the highest point and the target roundness value is less than or equal to 0.2 mm. This reel configuration can effectively reduce strip jitter during unwinding and suppress coiling faults.

[0043] In a second aspect, an embodiment of the present invention provides a control method for improving winding stacking faults, wherein the uncoiler includes the reel described in the first aspect, specifically, Figure 2 As shown, the method includes the following steps S101 to S102:

[0044] Step S101: When there is a winding fault in the uncoiler, the following shape repair steps are performed on the uncoiler drum:

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

[0046] In one embodiment, in order to quickly determine the source of the winding fault problem, when a winding fault exists 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 appearance repair step also includes: grinding the sliding surfaces of the copper lining plate, the fan-shaped plate and the sliding surface of the pyramid sleeve to a preset thickness, and expanding the outer diameter of the fan-shaped plate based on the preset thickness to restore the outer diameter of the fan-shaped plate, wherein the sliding surface of the fan-shaped plate is the sliding surface that is not fixedly connected to the copper lining plate.

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

[0049] In a specific embodiment, expanding the outer diameter of the sector plate based on a preset thickness may include: calculating the height reduction in the diameter direction of the sector plate after grinding based on the inclination angle of the sliding surface of the pyramid sleeve and the preset thickness; determining the displacement amount that the pyramid sleeve and the winding core shaft need to move according to the height reduction amount; controlling the displacement amount of the pyramid sleeve and the winding core shaft toward 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 slide at the end of the fan-shaped plate is only located on one end face of the fan-shaped plate. The moving direction of the pyramid sleeve and the winding core shaft can be determined according to the position of the copper slide. For example: in one application scenario, the copper slide is located on the left side of the fan-shaped plate, and the pyramid sleeve and the winding core shaft move to the left.

[0051] Specifically, since the sliding surfaces of the copper lining, the sector plate and the pyramid sleeve are all worn, according to the degree of wear and experience, it is generally necessary to grind off 0.5mm on each sliding surface to remove the scratches. In order to ensure that the true outer diameter of the roll remains unchanged (for example: the outer diameter is ), according to the tilt angle α = 10°, the displacement is determined as:

[0052] According to 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 Get the displacement S to the left:

[0055] S=h / tan a

[0056] =(2×0.5) / (tan10cos10°)

[0057] =1 / sin10°=5.74mm

[0058] The movement S is 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 surfaces of each sector plate 103 respectively cooperate with four groups of wedge surfaces uniformly distributed along the circumferential direction of the pyramid sleeve 102. Taking the upper sector plate and pyramid sleeve as an example, by controlling the pyramid sleeve to move 5.74 mm to the left (in the direction of the copper slide plate), since the sliding surface of the pyramid sleeve and the sliding surface of the sector plate are in a cooperative sliding connection, in the process of controlling the pyramid sleeve to move to the left alone, the sliding surface of the upper sector plate corresponding to the sliding surface of the pyramid sleeve will be driven to move upward, and the same applies to the lower sector plate and pyramid sleeve, thereby realizing the expansion of the outer diameter of the sector plate.

[0060] According to the actually measured outer diameter of the sector plate and the preset target outer diameter, the outer circle of the sector plate is finely ground to obtain a finely ground sector plate.

[0061] In a specific embodiment, the outer circle of the sector plate is fine-ground according to the measured outer diameter of the restored sector plate and the preset target outer diameter, which can include: using structural tooling to position the sector plate and the pyramid sleeve to achieve overall clamping of the reel; 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.

[0062] Among them, the structural tooling may include: a first positioning member, a second positioning member and a third positioning member, the first positioning member is used to position one end of the pyramid sleeve, the second positioning member is used to position the other end of the pyramid sleeve, and the third positioning member is used to position one end of the fan-shaped plate.

[0063] like Figure 3As shown, the first positioning member 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 core shaft through a positioning groove. The first retaining ring 201 is arranged close to one end surface of the pyramid 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 pyramid sleeve and the core shaft, and the second sub-positioning block of the first positioning sleeve 202 is located between the first gear ring and one end face of the upper pyramid sleeve; the first sub-positioning block of the second positioning sleeve 203 is located between the pyramid sleeve and the core shaft, and the second sub-positioning block of the second positioning sleeve 203 is located between the first gear ring and one end face of the lower pyramid sleeve.

[0065] Similarly, the second positioning member may include: a second retaining ring 204, a third positioning sleeve 205 and a fourth positioning sleeve 206, the second retaining ring 204 being sleeved on the periphery of the core shaft through the positioning groove, the second retaining ring 204 being arranged near the other end surface of the pyramid sleeve, and the third positioning sleeve 205 and the fourth positioning sleeve 206 each including a first sub-positioning block and a second sub-positioning block integrally connected;

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

[0067] The third positioning member includes: a third gear ring 207, a baffle plate 208 and a top screw 209. The third gear ring 207 is sleeved on the periphery of the core shaft through a positioning groove. The third gear ring 207 is set close to the copper slide plate on the end face of the sector plate. The baffle plate 208 is sleeved on the periphery of the core shaft and is located between the third gear ring 207 and the copper slide plate on the end face of the sector plate. The gear plate 208 is also fixed to the end face of the sector plate through the top screw 209 for positioning the sector plate.

[0068] Specifically, if Figure 3 As shown, the pyramid sleeve and the sector plate are fixed on the tooling shaft 210 to simulate the structure of a real roll. The tooling shaft is customized according to the size of the roll intermediate shaft to ensure the same size. Considering that the grinding machine of the general processing plant cannot perform the overall clamping and grinding of the roll, a structural tooling is designed to cooperate with the outer circle of the sector plate. Fine grinding: The first retaining ring (with a positioning groove on the tooling shaft) and the positioning sleeve determine the right end of the pyramid sleeve's position; the second retaining ring (with a positioning groove on the tooling shaft) and the positioning sleeve determine the left end of the pyramid sleeve's position; the retaining plate, the top screw, and the third retaining ring (with a positioning groove on the tooling shaft) determine the position of the sector plate. These measures ensure that the outer diameter of the sector plate, after fine grinding, is consistent with the outer diameter accuracy of the original reel after assembly.

[0069] In a specific embodiment, the outer circle of the positioned fan-shaped plate is finely ground according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter, which may include: grinding the outer circle of the positioned fan-shaped plate for the first time according to the actual measured outer diameter of the fan-shaped plate and the preset target outer diameter, leaving a preset margin after the first grinding is completed, loosening the structural tooling to make each fan-shaped plate in a free state, and after standing for a preset period of time, re-clamping the reel with the structural tooling and performing a second grinding so that the outer diameter of the fan-shaped plate is the preset outer diameter.

[0070] First, use a measuring meter (such as an outside micrometer) to detect the outer diameter of the sector plate, and then use the measured outer diameter of the sector plate and the preset target outer diameter (such as ) to determine the thickness to be ground.

[0071] The preset margin may be 0.2 mm, the preset duration may be 160 to 170 hours, for example, the preset duration is 168 hours, and the preset outer diameter is the desired target outer diameter.

[0072] Specifically, the outer diameter of the sector plate is fine-ground in two steps. After the first grinding pass, a 0.2mm margin is left, the fixture is loosened, and each sector plate is free. The plate is then left to rest for 168 hours or placed in a stress relief furnace to release internal stress and deformation. After re-clamping, it is fine-ground again to the preset outer diameter, minimizing deformation of the sector plate and further ensuring the outer diameter accuracy is consistent with that of the original roll assembly.

[0073] In one example, in order to eliminate the defects on the outer surface of the sector plate, after fine grinding the outer circle of the positioned sector plate, the following steps may be performed: by adjusting the top screw 209, the sector plate 103 is controlled to move in a direction away from the copper slide 105, so that the sleeve expands under the action of the wedge surface, and then the scratches and fatigue layer on the outer circle of the sector plate 103 are ground off, thereby achieving fine grinding of the outer circle of the sector plate 103, wherein the size of the expansion is determined according to the size to be ground, and the position of the top screw 209 is as follows: Figure 3 shown.

[0074] Since the top screw 209 controls the change of 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 4Therefore, after the outer circle of the sector plate 103 is finely 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, the sleeve needs to be installed based on the newly measured positioning dimension to achieve precise assembly.

[0075] In order to check whether the outer circle of the fine-tuned fan plate meets the standard requirements, after obtaining the fine-tuned fan plate, the roundness value and circular runout of the outer circle of the fan plate can be tested, and then when the roundness value and / or circular runout do not meet the requirements, targeted grinding can be performed based on the abnormal values.

[0076] Furthermore, in order to control the dimensional accuracy of the reel after assembly, after obtaining the finely ground sector plate, the following may be included: 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 values ​​are detected to not meet the preset conditions, the copper slide 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. Figure 4 , which is a partially enlarged view of the copper slide plate 105 .

[0077] It should be noted that after the outer circle of the sector plate is finely ground on the tooling shaft, each sector plate and pyramid sleeve needs to be assembled on the mandrel. Since the sector plate will produce thermal deformation due to cutting during the processing process, the reel needs to be fine-tuned after assembly to better control the radial circular runout of the outer circle of the sector plate. Fine-tuning each sector plate individually can make the outer arc of each sector plate distributed on the same circumference. Fine-tuning the copper slide at the end of each sector plate ensures that the runout and surface morphology of each sector plate meet the control standards of the reel accuracy.

[0078] The preset conditions may include that the outer radian of the sector plate is high in the middle and low on both sides, that the distribution of the high position in the middle of the sector plate accounts for 60% to 80% of the entire outer radian, that the circular runout of the outer circle at the high position is less than or equal to 0.2 mm, and that 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. The target roundness value is a preset roundness value to be achieved.

[0079] Specifically, the control standards for the roll accuracy are: the roundness error of the roll in the 510mm true circle state is ≤0.2mm, and the circular runout of the mandrel in the 510mm true circle state is ≤0.2mm; the shape of the mandrel fan-shaped plate is guaranteed to be high in the middle and low on both sides, and the highest point is evenly distributed within the range of not less than 60% of the middle of the fan-shaped plate. Figure 5As shown, considering the arc treatment of the edge to prevent stress concentration, the high point range is generally taken as 60%≤α≤80%. For example, the distance from the center of the outer arc of the sector plate to the high point is 255mm, and the distance from the center to the low point is 250mm.

[0080] In a specific embodiment, detecting the roundness value of the outer circle of the fan-shaped plate may include: selecting multiple observation positions on the outer surface of the fan-shaped plate; for each observation point, taking two end points in the vertical direction and two end points in the horizontal direction of the roll cross-section corresponding to the observation point 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, detecting the roundness value of the outer circle of the fan-shaped plate.

[0081] Optionally, selecting a plurality of observation positions on the outer surface of the sector plate may include: selecting a plurality of observation points at high point positions on the outer surface of the sector plate.

[0082] Since the maximum expansion position of the uncoiler drum is not the true circle position, before testing, a number of test rings with equal inner diameters are placed on 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 reel, and in the process of controlling the expansion of the reel, the absolute value of the verticality between the test ring and the reel axis is adjusted to be less than or equal to 0.1 mm to obtain the expanded reel, wherein the outer diameter of the expanded reel is equal to the inner diameter value of the test ring.

[0083] In one embodiment, if Figure 7 、 Figure 8 As shown, for each observation point, two end points in the vertical direction and two end points in the horizontal direction are taken at the roll cross section corresponding to the observation point to obtain the difference between the outer diameter value in the vertical direction and the outer diameter value in the horizontal direction, which may include: for each observation point, two end points in the vertical direction and two end points in the horizontal direction are taken at the roll cross section corresponding to the observation point, the roll is rotated, and the circular runout of the roll is detected using a dial indicator at each observation point, and the data distribution of each observation point is recorded; the outer diameter value in the vertical direction is obtained based on the data distribution and the two end points in the vertical direction, and the outer diameter value in the horizontal direction is obtained based on the data distribution and the two end points in the horizontal direction, and the difference between the outer diameter value in the vertical direction and the outer diameter value in the horizontal direction is calculated.

[0084] Specifically, three test rings (TESTRING) are placed on the outside of the reel. The distances between adjacent test rings are equal, and the distances between the test rings on both sides and the end face of the reel are between 150 and 200 mm. That is, the position and distribution of the test rings are as follows: Figure 6 Start the hydraulic system to control the expansion of the drum, and use a dial indicator to check and adjust the absolute value of the verticality between the test ring and the drum axis to ≤ 0.1mm, so that the test ring and the drum are perpendicular to each other and the expansion error is reduced.

[0085] Select 4 observation points near the test ring. For example, the first and second observation points are located between the left test ring and the middle test ring, and the third and fourth observation points are located between the right test ring and the middle test ring. Figure 7 As shown, the four positions shown are the first observation point to the fourth observation point ①~④. At each position, 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 outside diameter micrometer is used to detect the outside diameter, and the difference S1 between the outside diameters of AC and BD is obtained. It is determined whether the absolute value of S1 is ≤0.2mm.

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

[0087] Specifically, the reel is slowly rotated, and the circular runout is detected using a dial indicator at the four positions shown in ① to ④ above, and the data distribution is recorded. Based on the data distribution, it is detected whether the roundness value of the sector plate is ≤0.2mm. It should be noted that in order to avoid interference with the test from the data at the low points on both sides, the recorded data distribution can only take the data from the 80% range of the middle area of ​​each sector plate. Among them, when detecting the circular runout, the aforementioned test ring is used for fixing and then testing, which can obtain the circular runout of the reel with the target outer diameter, reduce errors, and improve detection accuracy.

[0088] Of course, as other optional 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 is not limited in this application.

[0089] Furthermore, in order to make the reel meet the control standards and improve the accuracy of the reel, after adjusting the copper slide plate at the end of the corresponding fan plate according to the detection results, it can also include: re-performing an appearance repair step on the reel, so that the circular runout of the outer circle of the fan plate and the roundness value of the outer circle of the fan plate meet the preset conditions.

[0090] Therefore, the problem of winding fault is improved by repairing the appearance of the roll. During the roll repair process, the sliding surface of the fan plate and the sliding surface of the pyramid sleeve are first repaired to increase the contact area between the two and standardize the sliding gap between the two, which is conducive to preliminarily improving the control accuracy of the roll; then the scratches on the sliding surfaces of the copper lining plate, the fan plate and the pyramid sleeve are ground off, and then according to the inherent structure of the sliding connection between the sliding surface of the fan plate and the sliding surface of the pyramid sleeve, the outer diameter of the fan plate is expanded and the outer diameter compensation is performed, so as to restore the true circle outer diameter of the roll after grinding to the true circle outer diameter value of the roll before grinding, and then the outer circle of the fan plate is fine-ground to obtain the fine-ground fan plate, thereby realizing the repair of the appearance and control accuracy of the roll. The repaired roll is used in the uncoiler winding, which can better avoid the jitter problem during unwinding caused by poor roll appearance accuracy, thereby improving the winding fault and improving production accuracy.

[0091] In summary, the control method for improving coiling stacking faults provided by the embodiment of the present invention improves the roll morphology and performs precision detection and control. After the roll is repaired and applied on site, it can effectively improve the operating stability of the strip after uncoiling and improve the problem of excessive stacking fault values ​​of the steel coils off the finishing and recoiling unit.

[0092] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0093] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A reel, characterized in that: include: A sector plate, a pyramid sleeve, and a copper lining plate disposed between the sliding surface of the sector plate and the sliding surface of the pyramid sleeve, wherein the copper lining plate is fixedly connected to 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 clearance between the copper lining plate and the sliding surface of the pyramid sleeve is between 0 and 0.05 mm.

2. The reel according to claim 1, wherein The outer radian of the sector plate is high in the middle and low on both sides, and the high position in the middle of the sector plate accounts for 60% to 80% of the entire outer radian; 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.

3. A method for improving winding stacking fault control, characterized in that: Applied to an uncoiler, the uncoiler comprising a reel according to any one of claims 1 to 2, the method comprising: In the case of winding faults on the uncoiler, perform the following steps to repair the appearance of the uncoiler drum: The copper lining plate is ground so that the contact area between the copper lining 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 the maximum sliding gap between the copper lining plate and the sliding surface of the pyramid sleeve is controlled to be between 0 and 0.05 mm.

4. The method according to claim 3, wherein The shape repairing step further comprises: The outer circle state of the fan-shaped plate is adjusted to meet preset conditions, and the preset conditions include: the outer circle curvature of the fan-shaped plate is 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 curvature, 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 target roundness value.

5. The method according to claim 4, wherein The adjusting the outer circle state of the sector plate to meet a preset condition includes: Grinding the copper lining 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 lining plate; According to the measured outer diameter of the sector plate and the preset target outer diameter, the outer circle of the sector plate is finely ground to obtain a finely ground sector plate, so that the outer circle state of the sector plate meets the preset conditions.

6. The method according to claim 5, wherein The 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 of the pyramid sleeve according to the height reduction amount; The pyramid sleeve is controlled to move toward the copper slide plate at the end of the sector plate by the displacement amount to expand the outer diameter of the sector plate.

7. The method according to claim 5, wherein The fine grinding of the outer circle of the sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter comprises: The sector plate and the pyramid sleeve are positioned by using structural tooling to achieve the overall clamping of the reel; The outer diameter of the sector plate is detected, and the outer circle of the positioned sector plate is finely ground according to the measured outer diameter of the sector plate and a preset target outer diameter.

8. The method according to claim 7, wherein The fine grinding of the outer circle of the positioned sector plate according to the measured outer diameter of the sector plate and the preset target outer diameter comprises: According to 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 margin is left, and the structural tooling is loosened so that each sector plate is in a free state. After standing for a preset period of time, the reel is re-clamped using the structural tooling and ground for the second time so that the outer diameter of the sector plate is the preset outer diameter.

9. The method according to claim 5, wherein After obtaining the finely ground sector plate, the method further comprises: 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 it is detected that any of the values ​​does not meet the preset conditions, the copper slide plate at the corresponding end of the fan-shaped plate is adjusted according to the detection result so that the circular runout of the outer circle of the fan-shaped plate and the roundness value of the outer circle of the fan-shaped plate both meet the preset conditions.

10. The method according to claim 9, wherein The detecting the roundness value of the outer circle of the sector plate includes: Select multiple observation positions on the outer surface of the sector plate; For each observation point, take the two end points in the vertical direction and the two end points in the horizontal direction of the roll section corresponding to the observation point, and 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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