Method for measuring and correcting the centering value of the entry guide of a hot continuous rolling finishing mill

Abstract

The present application belongs to the field of magnesium alloy processing, and particularly relates to a method for quickly measuring the centering value of an entry guide of a hot continuous rolling finishing mill and a method for correcting deviation, which can detect the deviation between the entry guide and the rolling center line and can also correct the deviation, and a technical scheme comprises the following steps: an auxiliary line is arranged in the finishing mill, the auxiliary line is parallel to the center line of the finishing mill, and the horizontal distance O between the auxiliary line and the center line is arranged; a reference point is arranged on one side of the finishing mill, and the reference point is located on the extension line of the auxiliary line; the distance L1 between the reference point and the inner side surface of a first guide of an entry guide of the finishing mill is measured, the distance L2 between the reference point and the inner side surface of a second guide of the entry guide is measured, and the inner side surface of the first guide is arranged opposite to the inner side surface of the second guide.

Description

Technical Field

[0001] This invention belongs to the field of magnesium alloy processing, and particularly relates to a method for rapid measurement of the center value of the inlet guide of a hot continuous rolling mill and a method for correction. Background Technology

[0002] In the hot strip mill finishing unit of the metallurgical industry, the inlet guide device is the main equipment to ensure production. Controlling the center value of the inlet guide is a critical aspect of the production process. As hot-rolled strip passes through the mill, the inlet guide of each stand guides it into the mill, ensuring normal rolling. Because hot strip milling is a continuous production unit, deviations in the center value of the inlet guide can easily cause scrap due to obstruction during the rolling process. Therefore, frequent and rapid measurements and readjustments of the inlet guide center value are required during production breaks.

[0003] The current method for measuring the center value of the entrance guide involves horizontally setting a steel wire inside the entrance guide of each finishing mill. The steel wire is positioned directly above the rolling center line and kept parallel. All operations are stopped at each mill, and workers enter the mill to perform the measurement. During the operation, the steel wire may be accidentally bumped, affecting the accuracy of the entrance guide center value detection. Furthermore, the detection time for the entrance guide center value is relatively long, with each measurement taking approximately 4 hours.

[0004] After measuring the center value of the entrance guide, the center value deviation of the entrance guide is obtained. Then, the position of the lower bottom frame of the entrance guide is adjusted according to the deviation. After that, the center value of the entrance guide is re-measured to meet the equipment function accuracy management regulations. This process is very cumbersome and has low accuracy, and it also interferes with the normal operation of the finishing mill. Summary of the Invention

[0005] To overcome the deficiencies in the aforementioned related technologies, this invention provides a method for rapid measurement of the center value of the inlet guide of a hot continuous rolling mill and a method for correcting deviations. This method can detect the deviation between the inlet guide and the rolling center line and can also correct the deviation.

[0006] To achieve the above technical objectives, this invention provides a method for rapid measurement of the center value of the inlet guide of a hot strip mill finishing mill. The method includes: setting an auxiliary line within the finishing mill, the auxiliary line being parallel to the center line of the finishing mill, with a horizontal distance O between the auxiliary line and the center line; setting a reference point on one side of the finishing mill, the reference point being located on an extension of the auxiliary line; measuring the distance L1 between the reference point and the inner surface of a first guide of the inlet guide of the finishing mill, and measuring the distance L2 between the reference point and the inner surface of a second guide of the inlet guide, wherein the inner surfaces of the first guide and the second guide are positioned opposite each other.

[0007] Preferably, the method for measuring the distance L1 between the reference point and the inner surface of the first guide rail and / or the method for measuring the distance L2 between the reference point and the inner surface of the second guide rail includes a level or a total station. The level or total station measures the distance between the reference point and the inner surface of the first guide rail. The level or total station measures the distance between the reference point and the inner surface of the second guide rail.

[0008] On the other hand, the present invention provides a method for center value correction of the inlet guide of a hot strip mill finishing mill. The method for center value correction of the inlet guide of a hot strip mill finishing mill is based on the rapid measurement method for the center value of the inlet guide of a hot strip mill finishing mill described in any of the above embodiments, wherein a reference point is set on one side of the finishing mill. The method for center value correction of the inlet guide of a hot strip mill finishing mill includes: determining whether an auxiliary line set inside the finishing mill is close to the inner side of the first guide.

[0009] If so, calculate the difference H1 between the sum of the distance L1 between the reference point and the inner side of the first guide and the horizontal distance O between the auxiliary line and the center line of the finishing mill, and the distance L2 between the reference point and the inner side of the second guide.

[0010] If not, calculate the difference H2 between the distance L1 and the sum of the distance L2 and the horizontal distance O.

[0011] Determine whether the difference of 1 / 2 times H1 or 1 / 2 times H2 falls within the deviation range specified by the entrance guide.

[0012] If so, then the entrance guides meet the requirements.

[0013] If not, determine whether the difference of 1 / 2 times H1 or 1 / 2 times H2 is greater than the maximum value Q specified for the deviation of the entrance guide.

[0014] If so, a limiting block is provided on one side of the first guide of the finishing mill, and the limiting block is configured to restrict the first guide from moving away from the center line.

[0015] If not, a limiting block is provided on one side of the second guide of the finishing mill, the limiting block being configured to restrict the second guide from moving away from the centerline.

[0016] Preferably, the limiting block is disposed on one side of the first guide, and the distance R1 between the limiting block and the end of the first guide's running trajectory away from the center line is less than or equal to the difference H1-2Q.

[0017] Preferably, the limiting block is disposed on one side of the second guide, and the distance R2 between the limiting block and the end of the second guide's running trajectory away from the center line is less than or equal to the difference H2-2Q.

[0018] The beneficial effects of this invention are as follows: This invention establishes a reference point and uses a total station or level to measure the distance from the reference point to the first and second guides. Once the distance between the reference point and the rolling center line can be determined, the distances of the first and second guides from the rolling center line can be known. This method offers the advantages of speed and accuracy.

[0019] The deviation of the center value of the entrance guide obtained by the measurement method of the center value of the entrance guide can be used to correct the deviation of the first or second guide. The movement position of the first or second guide can be limited by setting a limit block. The deviation of the center value of the entrance guide can be kept within the specification by the distance between the limit block and the side of the first or second guide away from the rolling center line. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating the steps of the rapid measurement method for the center value of the inlet guide of the hot strip mill finishing mill according to the present invention. Figure 2 This is a positional diagram of the reference point of the present invention relative to the first and second guides; Figure 3 This is another positional diagram of the reference point of the present invention relative to the first and second guides; Figure 4 This is a step diagram of the method for center value correction of the inlet guide of the hot continuous rolling mill according to the present invention; Figure 5 This is a positional diagram of the limiting block relative to the first guide and the second guide according to the present invention; Figure 6 This is another positional diagram of the limiting block relative to the first guide and the second guide according to the present invention. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] On one hand, some embodiments of the present invention provide a method for rapid measurement of the center value of the inlet guide of a hot strip mill finishing mill. Among them, such as... Figure 1 As shown, the method for rapid measurement of the center value of the inlet guide of the hot strip finishing mill includes: S1. An auxiliary line is set inside the finishing mill, the auxiliary line being parallel to the center line of the finishing mill, and the horizontal distance between the auxiliary line and the center line being O.

[0026] S2. A reference point is set on one side of the finishing mill; and the reference point is located on the extension line of the auxiliary line.

[0027] S3. Measure the distance L1 between the reference point and the inner side of the first guide of the entry guide of the finishing mill, and measure the distance L2 between the reference point and the inner side of the second guide of the entry guide, wherein the inner side of the first guide and the inner side of the second guide are arranged opposite to each other.

[0028] In some examples, such as Figure 2 or Figure 3As shown, the centerline of the finishing mill can be the rolling centerline A, which overlaps vertically with the centerline of the steel strip to be rolled in the finishing mill. Generally, other equipment is also installed at the centerline of the finishing mill. That is to say, in order to avoid other equipment, the reference point 3 cannot be set on the centerline of the finishing mill, so that the reference point 3 and the centerline of the finishing mill have a horizontal distance O, which can be 2.35m to 2.65m.

[0029] To accurately control the horizontal distance O between the reference point and the centerline of the finishing mill, an auxiliary line B can be set. The auxiliary line B can be, for example, a line set on the workshop floor, and it should be parallel to the centerline of the finishing mill. Since only the distance between the reference point 3 and the centerline of the finishing mill is needed, the reference point 3 can be set on the auxiliary line B, without needing to ensure the specific position of the reference point 4 on the auxiliary line B.

[0030] Reference point 3 can be a fixed point set on one side of the finishing mill, for example, it can be a pole fixed on the workshop floor.

[0031] The entrance guide includes two opposing guides, a first guide 1 and a second guide 2. A position of the first guide 1 is selected, and the distance L1 between the position of the first guide 1 and the reference point 3 is measured. A position of the second guide 2 is selected, wherein the position of the second guide 2 and the position of the first guide 1 are opposite to each other, thus ensuring the accuracy of the centering value of the entrance guide. The distance L2 between the position of the second guide 2 and the reference point 3 is measured. Both distances L1 and L2 are horizontal distances.

[0032] In some embodiments, the method for measuring the distance L1 between the reference point and the inner surface of the first guide rail and / or the method for measuring the distance L2 between the reference point and the inner surface of the second guide rail includes a level or a total station. The level or total station measures the distance between the reference point and the inner surface of the first guide rail. The level or total station measures the distance between the reference point and the inner surface of the second guide rail.

[0033] For example, a total station can be used to measure the reference point and the inner surfaces of the first guide and the second guide. Specifically, the total station can be positioned between the inner surface of the first guide and the reference point, and the total station is located on the side of the reference point away from the first guide in the direction of the centerline of the finishing mill. The distance L1 between a position on the inner surface of the first guide and the reference point can be measured quickly, and the distance L2 between a position on the inner surface of the second guide and the reference point can be measured in the same way.

[0034] On the other hand, some embodiments of the present invention also provide a method for center value correction of the inlet guide of a hot strip mill finishing mill. The method for center value correction of the inlet guide of a hot strip mill finishing mill is based on the rapid measurement method for the center value of the inlet guide of a hot strip mill finishing mill described in any of the above embodiments, wherein a reference point is set on one side of the finishing mill. For example... Figure 4 As shown, the method for correcting the center deviation of the inlet guide of the hot strip mill finishing mill includes: P1. Determine whether the auxiliary line set in the finishing mill is close to the inner side of the first guide.

[0035] P11. If so, calculate the difference H1 between the sum of the distance L1 between the reference point and the inner side of the first guide and the horizontal distance O between the auxiliary line and the center line of the finishing mill, and the distance L2 between the reference point and the inner side of the second guide.

[0036] P12. If not, calculate the difference H2 between the distance L1 and the sum of the distance L2 and the horizontal distance O.

[0037] P2. Determine whether the difference of 1 / 2 times H1 or 1 / 2 times H2 falls within the deviation range specified by the entrance guide.

[0038] P21. If so, then the entrance guides meet the specifications.

[0039] P22. If not, determine whether 1 / 2 times the difference H1 or 1 / 2 times the difference H2 is greater than the maximum value Q specified for the deviation of the entrance guide.

[0040] P221. If so, a limiting block is provided on one side of the first guide of the finishing mill, and the limiting block is configured to restrict the first guide from moving away from the center line.

[0041] P222. If not, a limiting block is provided on one side of the second guide of the finishing mill, the limiting block being configured to restrict the second guide from moving away from the centerline.

[0042] For example, the current range for the median deviation of the inlet guide is -5mm to +5mm. When the auxiliary line is set closer to the first guide, that is, the median deviation of the inlet guide is calculated by comparing the sum of distance L1 and horizontal distance O with distance L2. If the sum of distance L1 and horizontal distance O is greater than distance L2, it means that the rolling center line is biased towards the second guide, and vice versa. If the difference H1 between the sum of distance L1 and horizontal distance O and distance L2 is not within the range specified for median deviation, the inlet guide needs to be corrected so that the difference H1 between the sum of distance L1 and horizontal distance O and distance L2 is within the range specified for median deviation.

[0043] Similarly, the auxiliary line is set on the side closer to the second guide. That is to say, the calculation of the median deviation of the entrance guide is to compare the sum of distance L2 and horizontal distance O with distance L1. If the sum of distance L2 and horizontal distance O is greater than distance L1, it means that the rolling center line is biased towards the first guide, and vice versa. If the difference H2 between the sum of distance L2 and horizontal distance O and distance L1 is not within the range specified for median deviation, the entrance guide needs to be corrected so that the difference H2 between the sum of distance L2 and horizontal distance O and distance L1 is within the range specified for median deviation.

[0044] In some embodiments, such as Figure 5 As shown, the limiting block 4 is disposed on one side of the first guide 1, and the distance R1 between the limiting block 4 and the end of the first guide 1 that is away from the center line is less than or equal to the difference H1-2Q.

[0045] For example, the lower frame of the first guide 1 or the second guide 2 is adjusted in position, that is, moved in a direction perpendicular to the rolling center line A. When the distance between the first guide 1 and the rolling center line A is greater than the distance between the second guide 2 and the rolling center line A, the movement of the first guide 1 can be restricted to ensure that the difference between the distance between the first guide 1 and the rolling center line A and the distance between the second guide 2 and the rolling center line A is within the range specified by the center deviation of the inlet guide. In other words, by adding the limiting block 4, the first guide 1 forms a new running trajectory, and the difference between the maximum distance of the new running trajectory of the first guide 1 and the rolling center line A and the maximum distance of the running trajectory of the second guide 2 and the rolling center line A is less than the maximum value Q specified by twice the deviation of the inlet guide. That is, the distance R1 between the limiting block 4 and the end of the running trajectory of the first guide 1 away from the center line is less than or equal to the difference H1-2Q.

[0046] In some embodiments, such as Figure 6 As shown, the limiting block 4 is disposed on one side of the second guide 2, and the distance R2 between the end of the running trajectory of the limiting block 4 and the second guide 2 away from the center line is less than or equal to the difference H2-2Q.

[0047] For example, when the distance between the second guide 2 and the rolling center line A is greater than the distance between the first guide 1 and the rolling center line A, the difference between the distance between the second guide 2 and the rolling center line A and the distance between the first guide 1 and the rolling center line A can be ensured to be within the range specified by the center deviation of the inlet guide by limiting the movement position of the second guide 2. That is, by adding the limiting block 4, the second guide 2 forms a new running trajectory, and the difference between the maximum distance between the new running trajectory of the second guide 2 and the rolling center line A and the maximum distance between the running trajectory of the first guide 1 and the rolling center line A is less than the maximum value Q specified by twice the deviation of the inlet guide. That is, the distance R2 between the limiting block 4 and the end of the running trajectory of the second guide 2 away from the center line is less than or equal to the difference H2-2Q.

[0048] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for center value correction of the inlet guide of a hot continuous rolling mill finishing mill, characterized in that, include: An auxiliary line is set inside the finishing mill, the auxiliary line being parallel to the center line of the finishing mill, and the horizontal distance between the auxiliary line and the center line being O; A reference point is set on one side of the finishing mill; and the reference point is located on the extension line of the auxiliary line. Measure the distance L1 between the reference point and the inner side of the first guide of the entry guide of the finishing mill, and measure the distance L2 between the reference point and the inner side of the second guide of the entry guide, wherein the inner side of the first guide and the inner side of the second guide are arranged opposite to each other. The method for measuring the distance L1 between the reference point and the inner side of the first guide and / or the method for measuring the distance L2 between the reference point and the inner side of the second guide include a level or a total station. The level or total station measures the distance between the reference point and the inner side of the first guide. The level or total station measures the distance between the reference point and the inner side of the second guide. A reference point is set on one side of the finishing mill, and the method for center value correction of the inlet guide of the hot continuous rolling finishing mill includes: Determine whether the auxiliary line set inside the finishing mill is close to the inner side of the first guide; If so, calculate the difference H1 between the sum of the distance L1 between the reference point and the inner side of the first guide and the horizontal distance O between the auxiliary line and the center line of the finishing mill, and the distance L2 between the reference point and the inner side of the second guide. If not, calculate the difference H2 between the distance L1 and the sum of the distance L2 and the horizontal distance O; Determine whether the difference of 1 / 2 times H1 or 1 / 2 times H2 falls within the specified deviation range of the entrance guide; If so, then the entrance guards meet the requirements; If not, determine whether 1 / 2 times the difference H1 or 1 / 2 times the difference H2 is greater than the maximum value Q specified for the deviation of the entrance guide; If so, a limiting block is provided on one side of the first guide of the finishing mill, and the limiting block is configured to restrict the first guide from moving away from the center line; If not, a limiting block is provided on one side of the second guide of the finishing mill, the limiting block being configured to restrict the second guide from moving away from the centerline.

2. The method for center value correction of the inlet guide of a hot strip mill according to claim 1, characterized in that, The limiting block is disposed on one side of the first guide, and the distance R1 between the limiting block and the end of the first guide's running trajectory away from the center line is less than or equal to the difference H1-2Q.

3. The method for center value correction of the inlet guide of a hot strip mill finishing mill according to claim 2, characterized in that, The limiting block is disposed on one side of the second guide, and the distance R2 between the limiting block and the end of the second guide's running trajectory away from the center line is less than or equal to the difference H2-2Q.

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