CN114147088A - Device and method for reducing longitudinal and transverse slippage of steel strip in stretching uncoiling - Google Patents
Device and method for reducing longitudinal and transverse slippage of steel strip in stretching uncoiling Download PDFInfo
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- CN114147088A CN114147088A CN202111428022.4A CN202111428022A CN114147088A CN 114147088 A CN114147088 A CN 114147088A CN 202111428022 A CN202111428022 A CN 202111428022A CN 114147088 A CN114147088 A CN 114147088A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/16—Unwinding or uncoiling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
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Abstract
A device and a method for reducing longitudinal and transverse slippage of a steel strip in stretching and uncoiling relate to the field of oriented silicon steel processing. This device that steel band indulged transverse sliding in tensile opening a book of reduction includes the tray, be used for weighing the balance device of tray weight, the sponge and the liftable of locating the coil of strip top surface spout the pressure dish in order to loosen or extrude the sponge, the tray is used for placing the vertical coil of strip of arranging of axis, at least one outlet has been seted up to the bottom of tray, the bottom of spouting the pressure dish is equipped with a plurality of apopores, spout the pressure dish and still be equipped with the water inlet that communicates with the apopore, the apopore is located the top of sponge. The device and the method for reducing the longitudinal and transverse slippage of the steel strip in the stretching uncoiling can effectively reduce the longitudinal and transverse slippage of the steel strip in the stretching uncoiling and improve the yield of the steel strip.
Description
Technical Field
The application relates to the field of oriented silicon steel processing, in particular to a device and a method for reducing longitudinal and transverse slippage of a steel strip in stretching and uncoiling.
Background
Oriented silicon steel is an excellent soft magnetic material, and is the most key and most main iron core material in manufacturing of electromagnetic orientation conversion products such as transformers and mutual inductors due to the fact that magnetization of the oriented silicon steel has strong directionality, high magnetic induction in a required magnetization direction and low iron loss.
The production process of the oriented silicon steel comprises the following steps: the steel making, hot rolling, pickling normalizing, one-step cold rolling, decarburization annealing, high-temperature annealing, hot stretching annealing and shearing packaging are characterized in that the silicon content in the oriented silicon steel is high, and the crystal grain growth is huge in the high-temperature annealing process, so that the finished steel strip is particularly easy to brittle fracture, wherein the steel strip coil of the oriented silicon steel is in a vertical state in the high-temperature annealing process, the bottom surface of the steel strip is restrained by a flat plate when expanding with heat and contracting with cold to a certain extent, the upper surface of the steel strip is in a free expansion state, so that the steel strip can not be restored to an original state after being cooled, the steel strip is in a horn mouth shape after being taken out of a furnace, the gap between steel plate layers is increased, the oriented silicon steel sheet and HiB steel are coated with special magnesium oxide powder coatings with certain hydration degrees respectively before the high-temperature annealing, although the steel strip coil is dried and coiled, the water still exists in the coatings among the steel strip layers, during the high-temperature annealing process, water can be completely removed, and oxygen-containing and hydroxide-containing compounds in the coating are reduced and are dried and condensed into fine powder, so that gaps among the steel coil layers are enlarged and the steel coil layers are further loosened. In the process of uncoiling and rotating the steel coil of the oriented silicon steel, the upper half part (the part above a winding drum of an uncoiler) of the steel coil is tightly pressed on the winding drum under the action of gravity, so that gaps between layers are not obvious, but the lower half part of the steel coil is in a suspension state under the action of gravity, although the winding drum can expand, the interlaminar loosening effect is still very obvious (the gaps are enlarged), the uneven friction force of the upper part and the lower part of the steel coil is caused, the loosening nonuniformity is aggravated by the rotating steel coil, some layers become tight in the rotating process, some layers become looser, the friction force is rapidly reduced after the pressure is reduced to a certain degree after the layers become loose, the relative transverse movement between the layers can be generated in the steel coil loosening layer presenting a horn mouth shape, the relative longitudinal movement can be generated in some cases, as shown in figure 1, the influence of the interlaminar loosening on the oriented silicon steel with a thin specification (below 0.23mm) is more obvious, lateral sliding makes the coil of strip take place the staggered floor, it can hit the plate washer of decoiler both sides to slide to certain degree steel band limit portion, the steel band can produce obvious limit crack when the friction plate washer, the limit crack extremely leads to the fact disconnected area easily, consequently the unit has to appear the part abandonment of limit crack, this serious influence the yield of orientation silicon steel, longitudinal sliding then can make the steel band the crease appear (the individual layer steel band is flattened by tightening up the back, several horizontal seal of a government organization in old china appear on the steel band), this kind of defect can lead to the coil of strip to judge useless or become the product of stepping down.
In order to solve the above problems, a series of improvements have been made to unwinders:
the application number CN110328259A discloses an anti-back-rolling type external support structure additionally arranged on an uncoiler, which is characterized in that a fixed baffle plate is arranged at one end of a reel shaft, a movable baffle plate is arranged at the other end of the reel shaft, and the movable baffle plate is controlled to move along the axial direction of a reel by a hydraulic cylinder. The method prevents the problem that the steel coil slips and is rewound due to side sliding in a mode that the movable baffle is tightly pressed at the end part of the steel coil, so that the production cannot be carried out. Application numbers CN204369191U, CN204381110U, and CN204381111U, CN204365740U disclose an application of an auxiliary device, a side baffle, and a locking device of an oriented silicon steel uncoiler, which are mainly used for solving the problem of preventing the axial slippage or sliding of a steel coil in the continuous unwinding and uncoiling process.
The improvement is that a lateral baffle is added at the end part of the steel coil and certain axial force is applied to try to prevent the part of the steel coil which generates sliding movement from returning to the original position. However, because the oriented silicon steel is particularly brittle, the friction between the steel strip and the baffle plate makes the steel strip easy to generate edge cracks, and the edge cracks very easily cause the steel strip to break, thereby seriously affecting the production. Therefore, these methods cannot fundamentally solve the problem of the longitudinal and lateral slippage of the steel strip.
Disclosure of Invention
The application aims to provide a device and a method for reducing longitudinal and transverse slippage of a steel strip in stretching uncoiling, which can effectively reduce longitudinal and transverse slippage of the steel strip in stretching uncoiling and improve the yield of a steel coil.
The embodiment of the application is realized as follows:
the embodiment of the application provides a device that steel band indulges transverse sliding in reduction tensile is opened a book, it includes:
the tray is used for placing the steel coil with the axis arranged vertically, and the bottom of the tray is provided with at least one water outlet;
the weighing device is used for weighing the weight of the tray;
the sponge is arranged on the top surface of the steel coil;
spout the pressure disk, spout the pressure disk and be configured into the liftable in order to loosen or extrude the sponge, the bottom of spouting the pressure disk is equipped with a plurality of apopores, spouts the pressure disk still be equipped with the water inlet of apopore intercommunication, the apopore is located the top of sponge.
In some alternative embodiments, the sponge is annular in shape, and both the outer diameter and the inner diameter of the sponge are smaller than the outer diameter and the inner diameter of the steel coil.
In some optional embodiments, the top surface of the sponge is also provided with a limiting net;
in some optional embodiments, the limiting net is in a ring shape, and the outer edge bottom wall and the inner edge bottom wall of the limiting net extend downwards to form an outer limiting part and an inner limiting part which are attached to the outer wall and the inner wall of the sponge respectively.
In some optional embodiments, a plurality of water outlet holes are arranged at intervals along the circumferential direction of the pressure plate.
In some alternative embodiments, the bottom wall of the outer edge of the spraying disc extends downwards to form a limiting wall which is attached to the outer wall of the steel coil.
The application also provides a method for reducing the longitudinal and transverse slippage of the steel strip in stretching and uncoiling, which comprises the following steps:
vertically placing the axis of the steel coil subjected to high-temperature annealing in a tray, placing a sponge on the top surface of the steel coil, spraying moisture on the sponge, extruding the sponge downwards, loosening to finish a spraying and pressing process, discharging the moisture in the tray through a water outlet formed in the bottom of the tray, repeating the spraying and pressing process until the weight difference between the weighing tray in an initial state and the weight difference after the spraying and pressing process is M, and conveying the steel coil to hot stretching annealing;
wherein the content of the first and second substances,
d is the external diameter of the steel coil, D is the internal diameter of the steel coil, W is the height of the steel coil, and delta is the thickness of the steel coil.
In some optional embodiments, the spraying process is repeated N times, wherein N is more than or equal to 1.5W/delta H and less than or equal to 6W/delta H, W is the height of the steel coil, and delta H is the thickness of the sponge before compression minus the thickness of the sponge after compression.
In some alternative embodiments, the sponge is reduced in thickness by 60-80% when pressed downward.
The beneficial effect of this application is: the device that the steel band indulged transverse sliding in tensile the opening a book that this embodiment provided includes the tray, a balance device for weighing tray weight, the sponge and the liftable of locating the coil of strip top surface spout the pressure dish in order to loosen or extrude the sponge, the tray is used for placing the vertical coil of strip of arranging of axis, at least one outlet has been seted up to the bottom of tray, the bottom of spouting the pressure dish is equipped with a plurality of apopores, spout the pressure dish and still be equipped with the water inlet with the apopore intercommunication, the apopore is located the top of sponge. The application also provides a method for reducing the longitudinal and transverse slippage of the steel strip in stretching and uncoiling. The device and the method for reducing the longitudinal and transverse slippage of the steel strip in the stretching uncoiling can effectively reduce the longitudinal and transverse slippage of the steel strip in the stretching uncoiling and improve the yield of the steel strip.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic diagram of a process of relative lateral movement between layers of a steel coil loose layer;
FIG. 2 is a schematic cross-sectional view of an apparatus for reducing the longitudinal and transverse slippage of a steel strip in a drawing and uncoiling process according to an embodiment of the present application.
In the figure: 100. a tray; 101. a water outlet; 110. a scale device; 120. a sponge; 130. a limiting net; 131. an outer limit portion; 132. an inner limiting part; 140. a pressure spraying plate; 141. a water outlet hole; 142. a water inlet; 143. and a limiting wall.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The features and properties of the device and method for reducing the longitudinal and transverse slippage of steel strip in the drawing and uncoiling according to the present application will be described in further detail with reference to the following examples.
As shown in fig. 2, an embodiment of the present application provides a device for reducing longitudinal and lateral slippage of a steel strip during stretching and uncoiling, which includes a tray 100, a scale device 110 for weighing the weight of the tray 100, an annular sponge 120 and a liftable and lowerable pressure jetting disc 140, wherein the top surface of the tray 100 is used for placing a steel coil with a vertically arranged axis, the sponge 120 is disposed on the top surface of the steel coil, the outer diameter and the inner diameter of the sponge 120 are both smaller than those of the steel coil, the top surface of the sponge 120 is further provided with a limiting net 130, the limiting net 130 is annular, and the outer edge bottom wall and the inner edge bottom wall of the limiting net 130 respectively extend downward to form an outer limiting part 131 and an inner limiting part 132 which are attached to the outer wall and the inner wall of the sponge 120; the bottom of spraying pressure dish 140 is equipped with 20 apopores 141, 20 apopores 141 are along the circumference interval arrangement of spraying pressure dish 140, it is equipped with the water inlet 142 that communicates with apopore 141 to spray pressure dish 140 top, apopore 141 is located the top of sponge 120, 8 outlet 101 along its circumference interval arrangement are seted up to the bottom of tray 100, loosen or extrude spacing net 130 and sponge 120 when spraying pressure dish 140 goes up and down, the outward flange diapire downwardly extending of spraying pressure dish 140 forms the spacing wall 143 of laminating coil of strip outer wall, spray pressure dish 140 through the lift cylinder drive in this embodiment and go up and down, lift cylinder is not shown in the drawing.
The application also provides a method for reducing the longitudinal and transverse slippage of the steel strip in stretching and uncoiling, which is carried out by using the device for reducing the longitudinal and transverse slippage of the steel strip in stretching and uncoiling and comprises the following steps:
place the coil of strip axis after the high temperature annealing vertical in tray 100, place sponge 120 in coil of strip top surface, place spacing net 130 in sponge 120 top surface afterwards, make the outer spacing portion 131 and the interior spacing portion 132 of spacing net 130 laminate sponge 120 outer wall and inner wall respectively, use scale device 110 to weigh the weight of tray 100 at initial condition, let in water inlet 142, use apopore 14 that spouts the setting of pressure disk 140 bottom surface1, spraying moisture on the sponge, then moving the spraying disc 140 downwards to extrude the sponge 120 and then loosening the sponge to finish a spraying process, discharging the moisture in the tray 100 through a water outlet 101 formed in the bottom of the tray 100, repeating the spraying process until the weight difference between the initial state and the spraying process of the tray 100 is M, and sending the steel coil to hot stretching annealing; wherein the content of the first and second substances,
d is the external diameter of the steel coil, D is the internal diameter of the steel coil, W is the height of the steel coil, and delta is the thickness of the steel coil. Optionally, the number of times of repeating the spraying and pressing process can also be N, where N is not less than 1.5W/Δ H and not more than 6W/Δ H, W is the height of the steel coil, and Δ H is the thickness of the compressed sponge before and after compression. Optionally, the thickness of the sponge is reduced by 60-80% when the sponge is pressed downwards.
The device and the method for reducing the longitudinal and transverse slippage of the steel strip in the stretching uncoiling process, which are provided by the embodiment, vertically arrange the axes of the steel strip after high-temperature annealing, extrude the water in the sponge to flow down to the top surface of the steel strip after high-temperature annealing by an extrusion method, and because the steel strip after high-temperature annealing is in an up-loose and down-tight state, the water can fully enter the layers of the steel strip and can fully and smoothly flow to the lower end surface of the steel strip through the interlayer gaps under the action of gravity, so that the gaps between the upper and lower ends of the steel strip are all wetted by the water, the steel strip folding mark is reduced from 0-3 of the original single coil to 0, the rejection rate of the steel strip caused by the folding mark is reduced from 0-12% of the original single coil to 0, the transverse slippage of the steel strip is reduced from 80-150mm to 15-45mm, and the yield of the single coil in the hot stretching flattening process is improved from 86-94% to 94-96%, greatly reduces the waste material rate and has obvious economic benefit.
Example 1
The embodiment provides a method for reducing transverse slippage of a steel strip in the process of stretching, flattening and uncoiling oriented silicon steel, which is characterized in that after a steel coil of the oriented silicon steel is annealed at high temperature and fully cooled, the steel coil in a vertical state (with the axis arranged vertically) is pretreated, and the pretreatment equipment uses the device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling, wherein the diameter of a spray pressure plate 140 is 2m, and the weight of the spray pressure plate is 2000 kg; the sponge 120 has an outer diameter of 1.9m, an inner diameter of 0.45m and a thickness of 0.2m, and the pressure plate 140 can compress 75% of the sponge volume when it descends.
The method includes the steps that a steel coil discharged from a high-temperature annealing furnace is hoisted into a tray 100, a spraying pressure plate 140 is arranged above the steel coil, a sponge 120 and a limiting net 130 are sequentially arranged on the top surface of the steel coil, water starts to enter towards a water inlet 142 of the spraying pressure plate 140, the water entering time is determined according to whether the sponge 120 is fully absorbed, the weight weighed by a scale device 110 is not obviously increased at the moment, the water entering time is 2 minutes in the embodiment, at the moment, a lifting oil cylinder is controlled to put down the spraying pressure plate 140, the water in the sponge 120 is extruded out by the self weight of the lifting oil cylinder to permeate into the steel coil, after the sponge is completely pressed down, the spraying pressure plate 140 is slowly lifted, the water inlet 142 is kept for water entering all the time in the process, the spraying pressure plate 140 is stopped to be lifted after leaving the sponge 120 to finish one-time spraying pressure operation, the weighing device 110 is pressed down again after the weight is basically stable, and the above processes are repeated to finish the spraying pressure operation for 12 times.
After the spraying operation is finished, the spraying plate 140 is lifted, the weight is weighed by the weighing device 110, and the weight difference M between before the spraying and after the stopping of the spraying operation for 12 times is recorded as 205kg according to the formula
And calculating to obtain: 48kg or less and 205kg or less and 928kg or less meet the requirements. (1700 mm, 510mm, 1050mm, 0.23mm) for D, W, and δ.
And after the pretreatment is finished, hanging out the steel coil for turning over, and immediately uncoiling and producing in a hot stretching leveling unit.
Example 2
The embodiment provides a method for reducing transverse slippage of a steel strip in the process of stretching, flattening and uncoiling oriented silicon steel, which is characterized in that after a steel coil of the oriented silicon steel is annealed at high temperature and fully cooled, the steel coil in a vertical state (with the axis arranged vertically) is pretreated, and the pretreatment equipment uses the device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling, wherein the diameter of a spray pressure plate 140 is 2m, and the weight of the spray pressure plate is 2000 kg; the sponge 120 has an outer diameter of 1.9m, an inner diameter of 0.45m and a thickness of 0.3m, and the pressure plate 140 can compress 62% of the sponge volume when it descends.
The method includes the steps that a steel coil discharged from a high-temperature annealing furnace is hoisted into a tray 100, a spraying pressure plate 140 is arranged above the steel coil, a sponge 120 and a limiting net 130 are sequentially arranged on the top surface of the steel coil, water starts to enter towards a water inlet 142 of the spraying pressure plate 140, the water entering time is determined according to whether the sponge 120 is fully absorbed, the weight weighed by a scale device 110 is not obviously increased at the moment, the water entering time is 2 minutes in the embodiment, at the moment, a lifting oil cylinder is controlled to put down the spraying pressure plate 140, the water in the sponge 120 is extruded out by the self weight of the lifting oil cylinder to permeate into the steel coil, after the sponge is completely pressed down, the spraying pressure plate 140 is slowly lifted, the water inlet 142 is kept for water entering all the time in the process, the spraying pressure plate 140 is stopped to be lifted after leaving the sponge 120 to finish one-time spraying pressure operation, the weighing device 110 is pressed down again after the weight is basically stable, and the above processes are repeated to finish 9-time spraying pressure operation.
After the spraying operation is finished, the spraying plate 140 is lifted, the weight is weighed by the weighing device 110, and the weight difference M between before the spraying and after the 9 spraying operations are stopped is recorded as 155kg according to the formula
And calculating to obtain: 46kg or less and 155kg or less and 832kg or less meet the requirements. (D1750 mm, D510 mm, W1100 mm, δ 0.27 mm).
And after the pretreatment is finished, hanging out the steel coil for turning over, and immediately uncoiling and producing in a hot stretching leveling unit.
Example 3
The embodiment provides a method for reducing transverse slippage of a steel strip in the process of stretching, flattening and uncoiling oriented silicon steel, which is characterized in that after a steel coil of the oriented silicon steel is annealed at high temperature and fully cooled, the steel coil in a vertical state (with the axis arranged vertically) is pretreated, and the pretreatment equipment uses the device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling, wherein the diameter of a spray pressure plate 140 is 2m, and the weight of the spray pressure plate is 2000 kg; the sponge 120 has an outer diameter of 1.9m, an inner diameter of 0.45m and a thickness of 0.4m, and the pressure plate 140 can compress 70% of the sponge volume when it descends.
The method includes the steps that a steel coil discharged from a high-temperature annealing furnace is hoisted into a tray 100, a spraying pressure plate 140 is arranged above the steel coil, a sponge 120 and a limiting net 130 are sequentially arranged on the top surface of the steel coil, water starts to enter towards a water inlet 142 of the spraying pressure plate 140, the water entering time is determined according to whether the sponge 120 is fully absorbed, the weight weighed by a scale device 110 is not obviously increased at the moment, the water entering time is 2 minutes in the embodiment, at the moment, a lifting oil cylinder is controlled to put down the spraying pressure plate 140, the water in the sponge 120 is extruded out by the self weight of the lifting oil cylinder to permeate into the steel coil, after the sponge is completely pressed down, the spraying pressure plate 140 is slowly lifted, the water inlet 142 is kept for water entering all the time in the process, the spraying pressure plate 140 is stopped to be lifted after leaving the sponge 120 to finish one-time spraying pressure operation, the weighing device 110 is pressed down again after the weight is basically stable, and the above processes are repeated to finish the spraying pressure operation for 20 times.
After the spraying pressure is finished, the spraying pressure plate 140 is lifted, the weight is weighed by the weighing device 110, the weight difference M between before the spraying of water and after the spraying pressure operation is stopped for 20 times is recorded as 620kg, and the formula is used
And calculating to obtain: 41kg or less than 620kg or less than 798kg meets the requirements. (1800 mm, 510mm, 1040mm, 0.33 mm).
And after the pretreatment is finished, hanging out the steel coil for turning over, and immediately uncoiling and producing in a hot stretching leveling unit.
Example 4
The embodiment provides a method for reducing transverse slippage of a steel strip in the process of stretching, flattening and uncoiling oriented silicon steel, which is characterized in that after a steel coil of the oriented silicon steel is annealed at high temperature and fully cooled, the steel coil in a vertical state (with the axis arranged vertically) is pretreated, and the pretreatment equipment uses the device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling, wherein the diameter of a spray pressure plate 140 is 2m, and the weight of the spray pressure plate is 3000 kg; the sponge 120 has an outer diameter of 1.9m, an inner diameter of 0.45m and a thickness of 0.2m, and the pressure plate 140 can compress 80% of the sponge volume when it descends.
The method includes the steps that a steel coil discharged from a high-temperature annealing furnace is hoisted into a tray 100, a spraying pressure plate 140 is arranged above the steel coil, a sponge 120 and a limiting net 130 are sequentially arranged on the top surface of the steel coil, water starts to enter towards a water inlet 142 of the spraying pressure plate 140, the water entering time is determined according to whether the sponge 120 is fully absorbed, the weight weighed by a weighing device 110 is not obviously increased at the moment, the water entering time is 2 minutes in the embodiment, at the moment, a lifting oil cylinder is controlled to put down the spraying pressure plate 140, the water in the sponge 120 is extruded out by the self weight of the lifting oil cylinder to permeate into the steel coil, after the sponge is completely pressed down, the spraying pressure plate 140 is slowly lifted, the water inlet 142 is kept for water entering all the time in the process, the spraying pressure plate 140 is stopped to be lifted after leaving the sponge 120 to finish one-time spraying pressure operation, the weighing device 110 is pressed down again after the weight is basically stable, and the above processes are repeated to finish 15-time spraying pressure operation.
After the spraying pressure is finished, the spraying pressure plate 140 is lifted, the weight is weighed by the weighing device 110, the weight difference M between before the spraying of water and after the stopping of 15 times of spraying pressure operation is recorded as 490kg, and the formula is followed
And calculating to obtain: 57kg is less than or equal to 490kg is less than or equal to 1102kg and meets the requirement. (D1800 mm, D510 mm, W1100 mm, δ 0.23 mm).
And after the pretreatment is finished, hanging out the steel coil for turning over, and immediately uncoiling and producing in a hot stretching leveling unit.
Comparative examples 1, 2, 3, 4 were produced in a conventional uncoiling mode without pretreatment.
The effects of the respective examples and the respective comparative examples are shown in table 1 below.
TABLE 1 comparison of the effects of the examples and comparative examples
| Steel coil numbering | Number of creases | Rejection rate | Maximum lateral slippage (mm) | Yield of finished product | Description of the invention |
| 1 | 0 | 0 | 45 | 94％ | Example 1 |
| 2 | 0 | 0 | 42 | 94.6％ | Example 2 |
| 3 | 0 | 0 | 15 | 96％ | Example 3 |
| 4 | 0 | 0 | 35 | 94.5％ | Example 4 |
| 5 | 3 | 12％ | 140 | 88％ | Comparative example 1 |
| 6 | 2 | 11.6％ | 100 | 90％ | Comparative example 2 |
| 7 | 0 | 0 | 80 | 92％ | Comparative example 3 |
| 8 | 3 | 11.8％ | 120 | 89.9％ | Comparative example 4 |
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (9)
1. The utility model provides a device that steel band indulges transverse sliding in reduction tensile is opened a book which characterized in that, it includes:
the tray is used for placing a steel coil with a vertically arranged axis, and at least one water outlet is formed in the bottom of the tray;
a scale device for weighing the weight of the tray;
the sponge is arranged on the top surface of the steel coil;
spout the pressure disk, it is configured into the liftable in order to loosen or extrude to spout the pressure disk the sponge, the bottom of spouting the pressure disk is equipped with a plurality of apopores, spout the pressure disk still be equipped with the water inlet of apopore intercommunication, the apopore is located the top of sponge.
2. The device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling as claimed in claim 1, wherein the sponge is ring-shaped, and the outer diameter and the inner diameter of the sponge are both smaller than those of the steel coil.
3. The device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling as recited in claim 2, wherein a limiting net is further arranged on the top surface of the sponge.
4. The device for reducing the longitudinal and transverse slippage of the steel strip in the stretching uncoiling process according to claim 3, wherein the limiting net is annular, and the outer edge bottom wall and the inner edge bottom wall of the limiting net respectively extend downwards to form an outer limiting part and an inner limiting part which are attached to the outer wall and the inner wall of the sponge.
5. The device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling as claimed in claim 1, wherein a plurality of water outlet holes are arranged at intervals along the circumferential direction of the spraying disc.
6. The device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling as claimed in claim 1, wherein the bottom wall of the outer edge of the pressure spraying disc extends downwards to form a limiting wall attached to the outer wall of the steel coil.
7. A method for reducing longitudinal and transverse slippage of a steel strip in stretching and uncoiling is characterized by comprising the following steps:
vertically arranging the axis of the steel coil subjected to high-temperature annealing in a tray, placing a sponge on the top surface of the steel coil, spraying moisture on the sponge, extruding the sponge downwards, loosening to finish a spraying and pressing process, discharging the moisture in the tray through a water outlet formed in the bottom of the tray, repeating the spraying and pressing process until the weight difference between the tray in an initial state and the tray after the spraying and pressing process is M, and conveying the steel coil to hot stretching annealing;
wherein the content of the first and second substances,
d is the external diameter of the steel coil, D is the internal diameter of the steel coil, W is the height of the steel coil, and delta is the thickness of the steel strip.
8. The device for reducing the longitudinal and transverse slippage of the steel strip in the process of stretching and uncoiling as recited in claim 7, wherein the number of times of repeating the spraying and pressing process is N, N is more than or equal to 1.5W/Δ H and less than or equal to 6W/Δ H, W is the height of the steel coil, and Δ H is the thickness of the sponge before compression minus the thickness of the sponge after compression.
9. The device for reducing the longitudinal and transverse slippage of a steel strip during stretching uncoiling as claimed in claim 7, wherein the thickness of the sponge is reduced by 60-80% when the sponge is pressed downwards.
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