Coiling method for preventing strip breakage

Abstract

The application provides a coiling method for preventing strip breakage, wherein the method comprises the following steps: running a strip head into a coiling clamp jaw on a coiler mandrel; clamping the strip head by the coiling clamp, and controlling the coiler mandrel and the strip to rotate synchronously by a preset angle to avoid a maximum stress point of the strip in a coiling process, so that the tension on the strip is zero; and starting the coiler to build tension and coil when the coiler mandrel drives the strip to rotate to the preset angle. The application solves the problem of strip breakage in the coiling process of the strip, which leads to the failure of the coiling of the strip, and the scheme provided by the application improves the success rate of the coiling of the strip, and guarantees the quality of the strip and the production efficiency of the unit.

Description

Technical Field

[0001] This application relates to the field of steel rolling technology, and in particular to a coiling method for preventing strip breakage. Background Technology

[0002] A coiler is used to coil steel strip into a roll shape. It mainly consists of a coiler mandrel, gearbox, and motor. The coiler mandrel is surrounded by a jaw device and several sector plates, which open to form the outer circle of the mandrel. The jaw device includes jaw plates. During coiling, the head of the steel strip is guided into the jaws on the mandrel through the jaw plates and clamped. The rotation of the coiler mandrel achieves the coiling of the steel strip.

[0003] As my country's energy efficiency levels improve, the silicon content of non-oriented silicon steel is also increasing, making the material more and more brittle. When using conventional winding methods, the strip head will bend significantly and be subjected to greater tension during the winding process, making it very easy for the strip to break at the jaws, affecting the normal continuous production of the unit.

[0004] Therefore, how to avoid strip breakage accidents during strip winding, improve the success rate of strip coiling, and ensure the quality of strip and the production efficiency of the unit are urgent technical problems to be solved. Summary of the Invention

[0005] The purpose of this application is to provide a method for preventing strip breakage during coiling. This application solves the problem of strip breakage during the coiling process, which leads to coiling failure. The solution proposed in this application improves the success rate of strip coiling and ensures the quality of the coiled strip and the production efficiency of the unit.

[0006] Specifically, this application adopts the following technical solution:

[0007] According to a first aspect of the embodiments of this application, a winding method for preventing strip breakage is provided. The method includes: moving the strip head into the jaws of a winding clamp on a winding machine mandrel; clamping the strip head with the winding clamp and controlling the winding machine mandrel and the strip to rotate synchronously at a preset angle to avoid the maximum stress point of the strip during the winding process, so that the tension on the strip is zero; and when the winding machine mandrel drives the strip to rotate to the preset angle, the winding machine begins to perform tension building and winding.

[0008] In some embodiments of this application, based on the foregoing scheme, when the winding machine core shaft drives the strip to rotate by a preset angle, the running speed of the strip is: V = ωr; where ωr is the running speed of the strip; ωr is the angular velocity of the winding machine core shaft; and ωr is the radius of the winding machine core shaft.

[0009] In some embodiments of this application, based on the aforementioned scheme, the preset angle is 20° to 40°.

[0010] In some embodiments of this application, based on the foregoing scheme, the winding machine spindle has an angle positioning function.

[0011] In some embodiments of this application, based on the foregoing scheme, the winding machine includes a winding machine mandrel, a gearbox, and a motor.

[0012] In some embodiments of this application, based on the foregoing scheme, a sector plate is installed on the winding machine spindle.

[0013] In some embodiments of this application, based on the aforementioned scheme, the yield strength of the strip is 500MPa to 650MPa.

[0014] In some embodiments of this application, based on the aforementioned scheme, the tensile strength of the strip steel is 600MPa to 750MPa.

[0015] In some embodiments of this application, based on the foregoing scheme, the elongation of the strip is less than 10%.

[0016] In some embodiments of this application, based on the foregoing scheme, the strip steel is non-oriented silicon steel.

[0017] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0018] The solution proposed in this application can solve the problem of strip breakage during the strip coiling process, which leads to strip coiling failure. The solution proposed in this application improves the success rate of strip coiling and ensures the quality of the coiled strip and the production efficiency of the unit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application, 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 from these drawings without creative effort.

[0020] Figure 1 A flowchart illustrating a winding method for preventing strip breakage according to one embodiment of this application is shown.

[0021] Figure 2 A side view of a winding machine mandrel in one embodiment of this application is shown when winding strip steel. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0023] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0024] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0026] The implementation details of the technical solutions in the embodiments of this application are described in detail below:

[0027] Reference Figure 1 , Figure 1 This is a flowchart of a winding method for preventing strip breakage in one embodiment of this application.

[0028] According to a typical embodiment of this application, a winding method for preventing strip breakage is provided, the method comprising the following steps S1 to S3:

[0029] Step S1: Move the strip head into the jaws of the coiling clamp on the coiler spindle.

[0030] Step S2: The strip head is held by the winding clamp, and the winding machine core shaft and the strip are controlled to rotate synchronously by a preset angle to avoid the maximum stress point of the strip during the winding process, so that the tension on the strip is zero.

[0031] Step S3: After the winding machine mandrel drives the strip to rotate to a preset angle, the winding machine begins to build up the tension and wind up the strip.

[0032] In this application, the winding machine uses a winding clamp-assisted winding method. The winding clamp is installed on the winding machine mandrel. When the head of the strip runs into the jaws of the winding clamp on the winding machine mandrel (at this time, the jaws of the winding clamp are in the open state), the jaws of the winding clamp close, clamping the head of the strip. Then, the winding machine mandrel and the strip are controlled to rotate synchronously at a preset angle. After the winding machine mandrel drives the strip to rotate to the preset angle, the winding machine begins to build up the tension and wind up the strip.

[0033] In this application, during the process of the coiler winding strip steel, in order to ensure the strip steel's shape and winding quality and to avoid slippage or loosening of the strip steel during winding, the strip steel is subjected to a certain tension during winding. The coiling clamp will clamp the head of the strip steel tightly. At the beginning of winding, due to the tension on the strip steel, strip steel breakage accidents can easily occur, causing the production unit to be forced to stop operating, thereby affecting the production efficiency of the unit.

[0034] Reference Figure 2 , Figure 2 This illustration shows a side view of a coiler mandrel winding strip steel according to one embodiment of this application. In conventional coiler methods for winding strip steel, the winding process typically involves the coiler mandrel winding strip steel when the strip reaches… Figure 2 At point A (where the coiler's coiling clamp is also at point A), the coiler's coiling clamp grasps the strip head and immediately begins building up the strip coil. Figure 2 There is a point between points A and B in the coil where the strip experiences the greatest stress. This specific location is related to the angle of the coiling jaws and the relative arrangement of the coiling units. Figure 2 Tensioning begins at point A in the middle of the coil. When the strip passes through the point of maximum stress (which can be...), Figure 2 If point A is located between points B and A, the probability of the strip breaking is extremely high.

[0035] In the proposed solution, when the strip steel arrives... Figure 2 At point A (where the coiler's coiling clamp is also at point A), the coiler's coiling clamp holds the strip head and controls the coiler mandrel and the strip to rotate synchronously at a preset angle. Figure 2 Angle α in the middle, so that the coiling clamp holds the strip from Figure 2 Rotate synchronously at point A in the middle to Figure 2 At point B in the middle, when the strip reaches Figure 2 When the strip is at point B, the coiling process begins again to avoid the point of maximum stress during the coiling process. By avoiding the point of maximum stress, the success rate of coiling the strip is greatly improved.

[0036] In one embodiment of this application, when the coiler mandrel drives the strip to rotate by a preset angle, the running speed of the strip is:

[0037] V = ωr;

[0038] Wherein, V is the running speed of the strip; ω is the angular velocity of the coiler spindle; and r is the radius of the coiler spindle.

[0039] In this application, when the coiling clamp holds the strip head and controls the coiler spindle and the strip to rotate synchronously by a preset angle, since the strip should also be in a running state when the coiler spindle rotates, in order to ensure that the coiler spindle and the strip rotate synchronously, the running speed of the strip can be set to V = ωr, where V is the running speed of the strip; ω is the angular velocity of the coiler spindle; and r is the radius of the coiler spindle. Controlling the running of the strip with this speed can ensure the synchronous rotation of the coiler spindle and the strip, avoiding the situation where the coiler spindle applies excessive tension to the strip due to a mismatch between the rotation speed of the coiler spindle and the running speed of the strip, which could lead to a strip breakage accident.

[0040] In one embodiment of this application, the preset angle can be 20° to 40°.

[0041] In this application, the winding machine core shaft and the strip are controlled to rotate synchronously by a preset angle, and the preset angle can be controlled within the range of 20° to 40° (i.e., Figure 2 The angle α in the equation can be 20° to 40°. When the preset angle is between 20° and 40°, the success rate of strip coiling is greatly improved, ensuring the quality of the steel coil and the production efficiency of the unit.

[0042] In one embodiment of this application, the winding machine spindle has an angle positioning function.

[0043] In this application, the winding machine mandrel has an angle positioning function. The winding machine mandrel can also achieve angle positioning based on the angular velocity of the winding machine mandrel and the synchronous running time of the winding machine mandrel and the strip steel. This allows the maximum stress point of the strip steel to be avoided during the winding process, thereby ensuring the success rate of winding the strip steel.

[0044] In one embodiment of this application, the winding machine may include a winding machine mandrel, a gearbox, and a motor.

[0045] In this application, the coiler may further include a jaw plate, which is used to guide the strip head into the jaws of the coiling pliers, so that the coiling pliers can clamp the strip head, so that the coiler mandrel and the strip rotate synchronously at a preset angle to avoid the maximum stress point of the strip during the coiling process and ensure that the strip is successfully coiled.

[0046] In one embodiment of this application, a sector plate may be installed on the winding machine spindle.

[0047] In this application, the fan-shaped plate installed on the coiler spindle can ensure the success rate of coiling the strip steel, prevent the strip steel from slipping during the coiling process, and avoid affecting the quality of the strip steel due to slippage.

[0048] In one embodiment of this application, the yield strength of the strip can be 500MPa to 650MPa.

[0049] In one embodiment of this application, the yield strength of the strip can be 600MPa to 750MPa.

[0050] In one embodiment of this application, the elongation of the strip may be less than 10%.

[0051] In one embodiment of this application, the strip steel may be non-oriented silicon steel.

[0052] In this application, the strip steel can be non-oriented silicon steel. Nowadays, the silicon content of non-oriented silicon steel is getting higher and higher, and its thickness is generally around 2.5mm. Moreover, the strip steel itself is relatively brittle. When using conventional winding methods, the strip steel head will be subjected to large bending and large tension during the winding process, which will easily cause the strip to break at the jaw position, affecting the normal continuous production of the unit. By adopting the solution proposed in this application, the strip steel can be successfully wound into coils, ensuring the continuity of production and the quality of the strip steel.

[0053] The specific implementation of this application will be further illustrated by specific embodiments below, but the specific implementation of this application is not limited to the following embodiments.

[0054] This embodiment uses preset angles ( Figure 2 For angles α) of 0°, 20°, and 40°, 20 coils of strip steel (high brittle non-oriented silicon steel) are wound together. The specific coiling data is shown in the table below.

[0055]

[0056]

[0057] As can be seen from the implementation results of the above embodiments, the solution proposed in this application can greatly improve the success rate of strip steel coiling. When the preset angle is between 20° and 40°, the success rate of strip steel coiling is very high, ensuring the continuous production and quality of strip steel.

[0058] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0059] Firstly, the proposed solution can solve the problem of strip breakage during the coiling process, which leads to coiling failure. The proposed solution improves the success rate of strip coiling and ensures the quality of the coiled strip and the production efficiency of the unit.

[0060] Secondly, adopting the solution proposed in this application can ensure high-quality production of strip steel, improve the quality and production efficiency of strip steel, and increase market competitiveness and financial returns.

[0061] Third, adopting the solution proposed in this application can greatly reduce the amount of scrapped steel strip and equipment damage, and significantly save resources and equipment maintenance funds.

[0062] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A winding method for preventing steel strip breakage, characterized in that, The method includes: The strip head is brought into the jaws of the coiling clamps on the coiler mandrel; The strip head is held by the coiling clamp, and the coiling machine core shaft and the strip are controlled to rotate synchronously at a preset angle to avoid the maximum stress point of the strip during the coiling process, so that the tension on the strip is zero. The preset angle is 20°~40°. When the coiler mandrel drives the strip to rotate to a preset angle, the coiler begins to build up the tension and coil.

2. The method according to claim 1, characterized in that, When the coiler core shaft drives the strip to rotate by a preset angle, the running speed of the strip is: ； in, The running speed of the strip; The angular velocity of the winding machine spindle; The radius of the winding machine mandrel is given.

3. The method according to claim 1, characterized in that, The winding machine spindle has an angle positioning function.

4. The method according to claim 1, characterized in that, The winding machine includes a winding machine mandrel, a gearbox, and a motor.

5. The method according to claim 1, characterized in that, A sector plate is installed on the winding machine core shaft.

6. The method according to claim 1, characterized in that, The yield strength of the strip is 500MPa~650MPa.

7. The method according to claim 1, characterized in that, The tensile strength of the strip is 600MPa~750MPa.

8. The method according to claim 1, characterized in that, The elongation of the strip is less than 10%.

9. The method according to claim 1, characterized in that, The strip steel is non-oriented silicon steel.

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