A method for precision adjustment of an offline calibration stand for a continuous casting machine

Abstract

This application discloses a method for precision adjustment of an offline calibration bench for a continuous casting machine, relating to the field of precision measurement technology. The method includes measuring and adjusting the accuracy of the arc scale of the target continuous casting machine offline calibration bench using a laser tracker until a preset accuracy is achieved; measuring and adjusting the accuracy of the slide rail of the target continuous casting machine offline calibration bench using a laser tracker until a preset accuracy is achieved; measuring and adjusting the accuracy of the support column of the target continuous casting machine offline calibration bench using a laser tracker until a preset accuracy is achieved; when the accuracy of the arc scale, the slide rail, and the support column all reach their preset accuracy, the precision adjustment of the target continuous casting machine offline calibration bench is completed. This application fills the technological gap in the metallurgical industry regarding the measurement of offline calibration benches for continuous casting machines using laser trackers and effectively improves the accuracy of offline calibration benches for continuous casting machines.

Description

Technical Field

[0001] This application relates to the field of precision measurement technology, and in particular to a method for adjusting the precision of an offline calibration bench for a continuous casting machine. Background Technology

[0002] With the development of optical technology, optical measurement technology has become very mature. Laser trackers, as a practical application of this technology, are increasingly widely used in manufacturing and precision equipment companies. Compared to theodolites and levels, their functions are more comprehensive, and the measurement results, through reverse modeling and analysis, can intuitively express the positional accuracy of the equipment. In steel companies, continuous casting machines are generally divided into two main parts for precision positioning to ensure arc connection quality. The first is the overall frame, often called the "banana beam," used for arc connection quality evaluation. The second is the accuracy evaluation of the "casting segment" itself. Due to differences in offline calibration platforms, variations between platforms can lead to differences in the outer arc thickness of the casting segment, further affecting the arc connection accuracy between casting segments in the continuous casting machine.

[0003] Traditional testing methods lack effective direct calibration methods for arc gauges, generally requiring them to be sent back to professional metrology institutes, a cumbersome and inconvenient process. For slide rails, only height checks are possible, measured with a level, similar to support columns, resulting in poor accuracy. Slide rails, being relatively simple, can only be evaluated for height, failing to provide a comprehensive assessment of issues such as parallelism. Arc gauges lack effective and rapid evaluation methods. Overall height evaluation methods, including support column height measurement, rely solely on levels. However, with today's 0.2mm arc connection accuracy requirements, the relative positional accuracy of the support column and slide rail is even more stringent, clearly rendering levels inadequate.

[0004] Therefore, it is necessary to propose a precision adjustment method for the offline calibration stand of a continuous casting machine to solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] This application proposes a method for adjusting the precision of an offline calibration bench for a continuous casting machine, including:

[0007] The accuracy of the arc ruler on the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the arc ruler is achieved.

[0008] The accuracy of the slide rails on the offline calibration bench of the target continuous casting machine is measured and adjusted using a laser tracker until the preset accuracy of the slide rails is achieved.

[0009] The accuracy of the support column of the offline calibration bench of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the support column is achieved.

[0010] When the accuracy of the arc ruler, the accuracy of the slide rail, and the accuracy of the support column all reach the preset accuracy, the precision adjustment of the offline calibration table of the target continuous casting machine is completed.

[0011] In one feasible implementation, the accuracy of the arc gauge on the offline calibration bench of the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the arc gauge is achieved, including:

[0012] The scanning measurement data of the arc ruler is obtained based on a laser tracker; the scanning measurement data of the arc ruler includes the projection points of the slide rail mating surface, the projection points of the casting roll mating surface, and the position coordinates of the four corners of the side of the arc ruler;

[0013] Based on the position coordinates of the four corners of the side of the arc ruler, a projection reference plane is established;

[0014] Based on the projection reference plane, the position coordinates of the four corners of the arc ruler's side surface are fitted to a plane to obtain the target plane;

[0015] The projection points of the slide rail mating surface and the projection points of the casting roll mating surface are projected onto the target plane, thus converting the three-dimensional measurement data into two-dimensional measurement data.

[0016] The baseline is obtained by performing multi-point straight line fitting on the projection points of the slide rail mating surface;

[0017] The distance between the projection point of the casting roll mating surface and the baseline is obtained, and the distance is compared with a preset distance to obtain the accuracy error of the arc ruler;

[0018] Adjust the accuracy error of the arc ruler until the preset accuracy of the arc ruler is achieved.

[0019] In one feasible implementation, acquiring scanning measurement data of the arc ruler based on a laser tracker includes:

[0020] The contact position between the arc ruler and the slide rail is scanned and measured at multiple points using a laser tracker to obtain the projection points of the slide rail mating surface.

[0021] The laser tracker is used to scan and measure the mating position of the arc ruler and the casting roll at multiple points to obtain the projection points of the mating surface of the casting roll.

[0022] The position coordinates of the four corners of the arc ruler's side surface are obtained by measuring the four corners of the arc ruler's side surface using a laser tracker.

[0023] In one feasible implementation, adjusting the accuracy error of the arc ruler until the preset accuracy of the arc ruler is achieved includes:

[0024] The accuracy error of the arc ruler is adjusted by machining until the preset accuracy of the arc ruler is achieved.

[0025] In one feasible implementation, the accuracy of the slide rails on the offline calibration bench of the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the slide rails is achieved, including:

[0026] Multiple position coordinate points were obtained on the top surface and cylindrical surface of the slide rail using a laser tracker.

[0027] Calculate the height difference between the coordinates of the top surface of the slide rail, and adjust the height of the slide rail so that the height difference is within a preset height.

[0028] The cylindrical surface is obtained by fitting the coordinate points of the cylindrical surface of the slide rail, and the rotation center line of the cylindrical surface is calculated.

[0029] The included angle and span between the two slide rails are calculated using the rotation center line, and the positions of the two slide rails are adjusted until the distance error between the endpoints on the same side of the two slide rails reaches the preset distance error, thus achieving the preset accuracy of the slide rails.

[0030] In one feasible implementation, the accuracy of the support column of the offline calibration bench of the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the support column is achieved, including:

[0031] Multiple locations were selected at the top of each support column for measurement to obtain the height data of each support column.

[0032] Based on the height data of the location points, the flatness of the top plane of each support column is calculated and adjusted until the preset accuracy of the support column is achieved.

[0033] In one feasible implementation, when measuring and adjusting the accuracy of the support column of the offline calibration stand of the target continuous casting machine based on the laser tracker, the fitting accuracy between the support column and the slide rail is also measured and adjusted, specifically including:

[0034] Measure the height of the slide rail and calculate its average height;

[0035] The height of a single support column is compared with the average height of the slide rail to obtain the height difference between the support column and the slide rail.

[0036] Adjust the height difference between each support column and the slide rail individually until the matching accuracy between the support column and the slide rail is achieved.

[0037] In one feasible implementation, the height difference between each support column and the slide rail is adjusted individually until the matching accuracy between the support column and the slide rail is achieved, including:

[0038] The height difference between the support column and the slide rail can be adjusted by adding or removing shims under the top metal plate of the support column until the matching accuracy between the support column and the slide rail is achieved.

[0039] In one feasible implementation, before measuring and adjusting the arc-scale accuracy of the offline calibration bench of the target continuous casting machine based on a laser tracker, the method further includes:

[0040] The laser tracker is set up at the target location and initialized and calibrated.

[0041] The measurement area of ​​the offline calibration stand of the target continuous casting machine is cleaned.

[0042] The arc ruler of the offline calibration stand of the target continuous casting machine is fixed in position.

[0043] In one feasible implementation, the part to be measured on the offline calibration stand of the target continuous casting machine is cleaned, including:

[0044] The surface of the measurement area on the offline calibration stand of the target continuous casting machine is cleaned using an oil stain cleaner and oil-absorbing paper.

[0045] In summary, the precision adjustment method for the offline calibration bench of the continuous casting machine proposed in this application fills the technical gap in the metallurgical industry for measuring the offline calibration bench of the continuous casting machine using a laser tracker, and effectively improves the accuracy of the offline calibration bench of the continuous casting machine.

[0046] The precision adjustment method for the offline calibration bench of the continuous casting machine proposed in this application, other advantages, objectives and features of this application will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this application. Attached Figure Description

[0047] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0048] Figure 1 This is a flowchart illustrating a method for adjusting the precision of an offline calibration bench for a continuous casting machine, as provided in an embodiment of this application.

[0049] Figure 2A schematic diagram of the structure of an offline calibration stand for a continuous casting machine provided in an embodiment of this application;

[0050] Figure 3 This is a cross-sectional view of a slide rail provided in an embodiment of this application. Detailed Implementation

[0051] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0052] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0053] In existing technologies, slide rails can only be evaluated for height, and cannot comprehensively evaluate issues such as parallelism. Arc rulers lack effective and rapid evaluation methods, and overall height evaluation methods, including the measurement of support column height, rely solely on levels. However, with current requirements for 0.2mm arc connection accuracy, the relative positional accuracy requirements between the support column and the slide rail are even more stringent, clearly rendering levels inadequate. To fill the technological gap in the metallurgical industry regarding offline calibration platforms for continuous casting machines using laser trackers, and to effectively improve platform accuracy, this application provides methods for measuring and evaluating the accuracy of arc rulers, slide rails, support columns, and the fit between the support column and the slide rail.

[0054] Please see Figure 1 This is a schematic flowchart illustrating a precision adjustment method for an offline calibration bench for a continuous casting machine, provided in an embodiment of this application. Specifically, it may include:

[0055] S110. The accuracy of the arc ruler on the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the arc ruler is achieved.

[0056] S120. The accuracy of the slide rail of the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the slide rail is achieved.

[0057] S130. The accuracy of the support column of the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the support column is achieved.

[0058] S140. When the accuracy of the arc ruler, the accuracy of the slide rail, and the accuracy of the support column all reach the preset accuracy, the precision adjustment of the offline calibration table of the target continuous casting machine is completed.

[0059] For example, a continuous casting machine typically consists of 15 to 20 casting sections, within which "casting rolls" are arranged in an arc shape with a certain curvature. The most important spatial accuracy indicator for a continuous casting machine is the "arc alignment," which refers to whether these numerous casting rolls are strictly distributed according to the designed arc shape (curved sections) or straight line shape (flat sections). Figure 2 As shown, the offline calibration stand for the continuous casting machine consists of an arc-shaped guide rail 1, an arc-shaped ruler 2, the lower half of the casting section 3, and a support column 4. During single-section dimensional calibration, the upper and lower parts are separated, and the lower half is placed on the offline calibration stand. The arc-shaped ruler 2 is used to check the accuracy of the arc joint within the section. Therefore, for this part of the offline calibration stand, the accuracy of the arc-shaped ruler, the guide rail, and the support column are the factors affecting the calibration accuracy.

[0060] In some examples, the accuracy of the arc gauge on the offline calibration bench of the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the arc gauge is achieved, including:

[0061] The scanning measurement data of the arc ruler is obtained based on a laser tracker; the scanning measurement data of the arc ruler includes the projection points of the slide rail mating surface, the projection points of the casting roll mating surface, and the position coordinates of the four corners of the side of the arc ruler;

[0062] Based on the position coordinates of the four corners of the side of the arc ruler, a projection reference plane is established;

[0063] Based on the projection reference plane, the position coordinates of the four corners of the arc ruler's side surface are fitted to a plane to obtain the target plane;

[0064] The projection points of the slide rail mating surface and the projection points of the casting roll mating surface are projected onto the target plane, thus converting the three-dimensional measurement data into two-dimensional measurement data.

[0065] The baseline is obtained by performing multi-point straight line fitting on the projection points of the slide rail mating surface;

[0066] The distance between the projection point of the casting roll mating surface and the baseline is obtained, and the distance is compared with a preset distance to obtain the accuracy error of the arc ruler;

[0067] Adjust the accuracy error of the arc ruler until the preset accuracy of the arc ruler is achieved.

[0068] For example, a laser tracker is used to scan and measure multiple points at the contact point between the arc ruler and the slide rail. The purpose of this step is to obtain detailed shape information of the arc ruler at the contact point with the slide rail, providing a data basis for subsequent analysis.

[0069] Similarly, multiple points were scanned and measured at the mating position between the arc gauge and the casting roll. Since the mating accuracy between the arc gauge and the casting roll is crucial to the performance of the entire system, a detailed understanding of the shape and dimensions of this mating position is necessary.

[0070] Measure the coordinates of the four corners of the slant side of the ruler. Using these four points, a projection reference plane can be established. This reference plane will be used in subsequent steps to transform the three-dimensional measurement problem into a two-dimensional problem, thereby simplifying analysis and calculation.

[0071] Using the measured coordinates of the four corners of the side profile, a plane is fitted using mathematical methods. This yields a plane that closely approximates the actual situation, serving as a reference for subsequent projection.

[0072] The multiple points previously scanned at the contact points between the arc ruler and the slide rail, and at the mating points between the arc ruler and the casting roll, are projected onto the fitted plane. In this way, the original three-dimensional measurement problem is transformed into a two-dimensional problem, making the analysis and calculation simpler and more accurate.

[0073] For the points obtained by projecting the sliding rail mating surface, perform multi-point straight line fitting. This will give us a baseline that represents the shape characteristics of the sliding rail mating surface.

[0074] The points obtained by projecting the mating surfaces of different casting rolls are compared with the baseline, and the distances from these points to the baseline are calculated. Then, these distances are compared with the dimensions specified on the drawing to evaluate the accuracy error of the arc ruler. If the error is within 0.02mm, the accuracy of the arc ruler is considered to meet the requirements.

[0075] In some examples, the scanning measurement data of the arc ruler is obtained based on a laser tracker, including:

[0076] The contact position between the arc ruler and the slide rail is scanned and measured at multiple points using a laser tracker to obtain the projection points of the slide rail mating surface.

[0077] The laser tracker is used to scan and measure the mating position of the arc ruler and the casting roll at multiple points to obtain the projection points of the mating surface of the casting roll.

[0078] The position coordinates of the four corners of the arc ruler's side surface are obtained by measuring the four corners of the arc ruler's side surface using a laser tracker.

[0079] For example, the following data can be obtained by performing multi-point scanning measurement on the contact position between the arc ruler and the slide rail:

[0080] Spatial coordinate data: Three-dimensional coordinate values ​​(X, Y, Z): The X coordinate reflects the left-right position in a specific measurement space. The Y coordinate reflects the up-down position. The Z coordinate reflects the front-back position. These coordinate values ​​can accurately describe the position of the contact point between the ruler and the slide rail in space.

[0081] Shape Feature Data: Curvature Information: The local curvature at the contact point can be calculated using the coordinates of multiple points. This is crucial for understanding the degree of bending at the contact between the ruler and the slide rail, helping to determine the uniformity and stability of the contact. Surface Contour Data: Multi-point scanning can outline the surface contour of the contact point. This includes surface undulations, unevenness, etc., which can be used to evaluate the flatness and smoothness of the contact.

[0082] Relative position data: Point-to-point distances: The distances between multiple measured points reflect the dimensional changes in the contact area between the arc ruler and the slide rail. For example, the distance between adjacent points can be used to determine the uniformity of the contact area; large distance variations may indicate unstable contact or localized deformation. Distance from a point to a specific reference plane or axis: Using a fixed reference plane or axis as a reference, the distance from each scanning point to that reference is measured. This helps determine the relative position and orientation of the arc ruler on the slide rail, as well as whether there is any deviation or tilt.

[0083] The following data can be obtained by performing multi-point scanning measurements on the mating position of the arc ruler and the casting roll:

[0084] Spatial coordinate data: Three-dimensional coordinate values ​​(X, Y, Z): Precisely determine the specific position of each scanning point in space at the mating position, which helps to analyze the relative positional relationship between the arc ruler and the casting roll.

[0085] Shape Feature Data: Contour Information of Mating Surfaces: Understanding the shape of the mating surfaces, including the presence of irregular protrusions, depressions, or deformations. This is crucial for assessing the tightness and accuracy of the fit. Curvature and Radius Information: Determining the curvature and radiius of the mating surfaces to judge the degree of shape matching between the arc gauge and the casting roll. Mismatch in curvature or radiius may affect the accuracy and quality of the casting process.

[0086] Dimensional Data: Mating Clearance: By measuring multiple points, the mating clearance between the arc gauge and the casting roll can be calculated. This is crucial for ensuring stability and precision during the casting process; clearance that is too large or too small can cause problems. Dimensions of the Mating Surface (Length, Width, and Height): Accurately measuring the dimensions of the mating surfaces allows for comparison with design requirements to determine compliance with standards. This dimensional data can also be used for subsequent quality control and adjustments.

[0087] Relative position data: Distance from each scanning point to the casting roll axis: Determining the distance from each scanning point to the casting roll axis helps analyze whether the installation position and angle of the arc gauge on the casting roll are correct. Concentricity or eccentricity between the arc gauge and the casting roll: Through multi-point measurement, the concentricity or eccentricity between the arc gauge and the casting roll can be calculated. This is crucial for ensuring rotational stability and product quality during the casting process.

[0088] In some examples, the accuracy error of the arc ruler is adjusted until the preset accuracy of the arc ruler is achieved, including:

[0089] The accuracy error of the arc ruler is adjusted by machining until the preset accuracy of the arc ruler is achieved.

[0090] In some examples, the accuracy of the slide rails on the offline calibration bench of the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the slide rails is achieved, including:

[0091] Multiple position coordinate points were obtained on the top surface and cylindrical surface of the slide rail using a laser tracker.

[0092] Calculate the height difference between the coordinates of the top surface of the slide rail, and adjust the height of the slide rail so that the height difference is within a preset height.

[0093] The cylindrical surface is obtained by fitting the coordinate points of the cylindrical surface of the slide rail, and the rotation center line of the cylindrical surface is calculated.

[0094] The included angle and span between the two slide rails are calculated using the rotation center line, and the positions of the two slide rails are adjusted until the distance error between the endpoints on the same side of the two slide rails reaches the preset distance error, thus achieving the preset accuracy of the slide rails.

[0095] For example, to facilitate equipment maintenance, most slide rails have undergone external shape upgrades, such as... Figure 3 As shown, in conjunction with this common new modification to the slide rail, the accuracy measurement and adjustment method provided in this application involves uniformly selecting points on the top surface 11 of the slide rail. The purpose is to obtain information about different positions on the top surface of the slide rail. By uniformly selecting multiple points on the top surface, a more comprehensive understanding of the state of the top surface of the slide rail can be obtained. These points will be used for subsequent analysis of the levelness of the slide rail.

[0096] Points are uniformly selected on the cylindrical surface 12 of the slide rail: Similarly, multiple points are uniformly selected on the cylindrical surface of the slide rail. These points will be used for operations such as fitting the cylindrical surface and calculating the cylinder's rotation center line.

[0097] Analyzing the levelness of the slide rail using points obtained from the top surface 11: Using the coordinates of points taken from the top surface 11 of the slide rail, the height differences between these points can be calculated. By analyzing these height differences, it can be determined whether the top surface 11 of the slide rail is level. If the height difference is large, it indicates that the slide rail is not level and needs adjustment.

[0098] Adjust the height, repeating the previous step until the height difference is uniformly within 0.02mm: Based on the non-levelness of the top surface 11 of the slide rail analyzed in the previous step, adjust the height of the slide rail. After adjustment, execute the previous step again, that is, re-analyze the levelness of the top surface 11 of the slide rail. Repeat this process until the height difference of all points on the top surface 11 of the slide rail is within 0.02mm to meet the high precision requirements.

[0099] Points obtained from the slide rail cylindrical surface 12 are used for cylindrical surface fitting: Cylindrical surface fitting is a mathematical method that uses the coordinate information of these points to find a cylindrical surface equation that best approximates these points. This fitted cylindrical surface will be used for subsequent operations such as calculating the cylinder's rotation centerline.

[0100] The obtained cylindrical surface is then calculated, and the cylinder's center of rotation is further calculated. After fitting the cylindrical surface, the center of rotation of this cylindrical surface can be calculated mathematically. The center of rotation of the cylinder is the geometric central axis of the cylindrical surface and is very important for analyzing parameters such as the angle between the two rails and the span.

[0101] Using the calculated cylinder rotation centerline, the included angle and span between the two slide rails can be analyzed. The included angle refers to the angle between the rotation centerlines of the two slide rails, and the span refers to the horizontal distance between the two slide rails. Further adjustments are made to ensure that the distances at both ends are within ±0.02mm of the design value. If the analyzed included angle and span deviate significantly from the design value, the slide rail positions can be adjusted for correction. Then, the cylinder surface fitting, rotation centerline calculation, and included angle and span analysis are repeated. This process is repeated until the difference between the distances at both ends and the design value is within ±0.02mm to meet high precision requirements.

[0102] In some examples, the accuracy of the support columns of the offline calibration bench for the target continuous casting machine is measured and adjusted based on a laser tracker until the preset accuracy of the support columns is achieved, including:

[0103] Multiple locations were selected at the top of each support column for measurement to obtain the height data of each support column.

[0104] Based on the height data of the location points, the flatness of the top plane of each support column is calculated and adjusted until the preset accuracy of the support column is achieved.

[0105] For example, firstly, multi-point sampling is performed on the top of a single support column: multiple locations are selected on the top of each support column to measure the height data at these locations. This provides a more comprehensive understanding of the top plane of the column. Flatness analysis is then performed, with a flatness not exceeding 0.05 mm: based on the data obtained from the multi-point sampling, the flatness of the column top plane is calculated. Flatness is an indicator of the smoothness of a plane; here, the flatness is required to be no more than 0.05 mm to ensure a relatively flat top plane of the column. The column height is represented by the center point of the plane: the center point of the column top plane is determined, and the height of this center point is used to represent the height of the entire column. This simplifies the subsequent comparison and adjustment process. Similarly, the flatness of the other three columns is checked and adjusted: following the same steps, the same multi-point sampling, flatness analysis, and column height determination operations are performed on the other three support columns.

[0106] In some examples, when measuring and adjusting the accuracy of the support columns of the offline calibration bench for the target continuous casting machine based on a laser tracker, the fitting accuracy between the support columns and the slide rails is also measured and adjusted, specifically including:

[0107] Measure the height of the slide rail and calculate its average height;

[0108] The height of a single support column is compared with the average height of the slide rail to obtain the height difference between the support column and the slide rail.

[0109] Adjust the height difference between each support column and the slide rail individually until the matching accuracy between the support column and the slide rail is achieved.

[0110] For example, the height of the slide rail is measured, and the average height of the slide rail is calculated. Then, the height of a single column (characterized by the center point of the plane) is compared with the average height of the slide rail to obtain the height difference between them.

[0111] Adjust the height of the uprights based on the actual measured height difference and design requirements. The goal of the adjustment is to ensure that the height difference between the uprights and the slide rails does not exceed 0.02 mm compared to the design dimension. Repeat the same operation for the other three uprights, adjusting their heights one by one, until the height difference between all four uprights and the slide rails meets the design requirements.

[0112] In some examples, the height difference between each support column and the slide rail is adjusted individually until the desired fit accuracy between the support column and the slide rail is achieved, including:

[0113] The height difference between the support column and the slide rail can be adjusted by adding or removing shims under the top metal plate of the support column until the matching accuracy between the support column and the slide rail is achieved.

[0114] For example, review the equipment drawings to understand the height relationship between the slide rail and the column as required by the design. Based on the actual measured height difference and design requirements, adjust the column height by adding or removing shims under the metal plate on the top of the column.

[0115] In some examples, the process includes, before measuring and adjusting the accuracy of the arc scale on the offline calibration bench of the target continuous casting machine based on a laser tracker:

[0116] The laser tracker is set up at the target location and initialized and calibrated.

[0117] The measurement area of ​​the offline calibration stand of the target continuous casting machine is cleaned.

[0118] The arc ruler of the offline calibration stand of the target continuous casting machine is fixed in position.

[0119] For example, select the station with the best line of sight, set up the instrument and initialize the calibration while minimizing the distance measurement; use oil cleaner and oil-absorbing paper to treat the part to be measured to ensure the surface is clean; fix the position of the arc ruler while minimizing the distance measurement.

[0120] In some examples, the measurement area of ​​the offline calibration bench of the target continuous casting machine is cleaned, including:

[0121] The surface of the measurement area on the offline calibration stand of the target continuous casting machine is cleaned using an oil stain cleaner and oil-absorbing paper.

[0122] The technical solution of this application will be further described in detail below through specific embodiments.

[0123] This application describes the measurement process using a Leica AT40X laser tracker in the offline calibration bench area of ​​a company's steelmaking production line.

[0124] Step 1: Select a station with the best line of sight, and set up and initialize the instrument while minimizing the distance measurement.

[0125] Step 2: Use an oil stain cleaner and oil-absorbing paper to treat the area to be tested to ensure the surface is clean;

[0126] Step 3: While minimizing the distance measurement, fix the position of the arc ruler.

[0127] Step 4: Perform multi-point scanning of the contact area between the arc ruler and the slide rail;

[0128] Step 5: Perform multi-point scanning of the mating positions of the arc ruler and the casting roll;

[0129] Step 6: Measure the four corners of the side of the arc ruler to establish a projection reference plane;

[0130] Step 7: Perform plane fitting on the coordinates of the points obtained from the four corners of the side;

[0131] Step 8: Project the remaining points onto the plane established in Step 7, thus transforming the three-dimensional problem into a two-dimensional problem;

[0132] Step 9: Perform multi-point straight line fitting on the projection points obtained from the sliding rail mating surface to obtain the baseline;

[0133] Step 10: Compare the projected points of different casting roll mating surfaces with the lines obtained in Step 6 to further obtain the distances and compare them with the drawings to evaluate the errors;

[0134] Step 11: Machin the out-of-tolerance arc ruler, then repeat steps 3 to 10 to adjust the accuracy of the arc ruler until it meets the accuracy requirements.

[0135] Step 12: Take points evenly on the top surface of the slide rail;

[0136] Step 13: Take points evenly on the cylindrical surface of the slide rail;

[0137] Step 14: Analyze the levelness of the slide rail using points obtained from the top surface of the slide rail;

[0138] Step 15: Adjust the height and repeat step 14 until the height difference is uniformly within 0.02mm;

[0139] Step 16: Fit the points obtained from the cylindrical surface of the slide rail to the cylindrical surface;

[0140] Step 17: Calculate the obtained cylindrical surface, and further calculate the cylinder's rotation center line;

[0141] Step 18: Analyze the angle between the two rails and the span using the slewing center line;

[0142] Step 19: By making further adjustments, repeat steps 16 to 18 until the distance between the two ends is compared with the design value, and the difference is within ±0.02mm.

[0143] Step 20: Perform multi-point sampling on the top of a single support column;

[0144] Step 21: Perform flatness analysis; the flatness must not exceed 0.05 mm.

[0145] Step 22: Represent the height of the column by the center point of the plane;

[0146] Step 23: Similarly, check and adjust the flatness of the other three columns;

[0147] Step 24: Compare the difference between the average height of the slide rail and the height of a single column;

[0148] Step 25: Compare with the drawings and add or subtract shims under the metal plate on the top of the column so that the height difference between the column and the slide rail is no more than 0.02mm compared with the design dimension.

[0149] Repeat steps 24 and 25 to adjust the height of the other three columns.

[0150] It should be noted that the above embodiments are merely best examples and are not intended to limit the implementation of this application.

[0151] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0152] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0153] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A method for precision adjustment of an offline calibration bench for a continuous casting machine, characterized in that, include: The accuracy of the arc ruler on the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the arc ruler is achieved. The accuracy of the slide rails on the offline calibration bench of the target continuous casting machine is measured and adjusted using a laser tracker until the preset accuracy of the slide rails is achieved. The accuracy of the support column of the offline calibration bench of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset accuracy of the support column is achieved. When the accuracy of the arc ruler, the accuracy of the slide rail, and the accuracy of the support column all reach the preset accuracy, the precision adjustment of the offline calibration table of the target continuous casting machine is completed. The accuracy of the arc gauge on the offline calibration bench of the target continuous casting machine is measured and adjusted using a laser tracker until the preset accuracy of the arc gauge is achieved, including: The scanning measurement data of the arc ruler is obtained based on a laser tracker; the scanning measurement data of the arc ruler includes the projection points of the slide rail mating surface, the projection points of the casting roll mating surface, and the position coordinates of the four corners of the side of the arc ruler; Based on the position coordinates of the four corners of the side of the arc ruler, a projection reference plane is established; Based on the projection reference plane, the position coordinates of the four corners of the arc ruler's side surface are fitted to a plane to obtain the target plane; The projection points of the slide rail mating surface and the projection points of the casting roll mating surface are projected onto the target plane, thus converting the three-dimensional measurement data into two-dimensional measurement data. The baseline is obtained by performing multi-point straight line fitting on the projection points of the slide rail mating surface; The distance between the projection point of the casting roll mating surface and the baseline is obtained, and the distance is compared with a preset distance to obtain the accuracy error of the arc ruler; Adjust the accuracy error of the arc ruler until the preset accuracy of the arc ruler is achieved; The scanning measurement data of the arc ruler is obtained based on a laser tracker, including: The contact position between the arc ruler and the slide rail is scanned and measured at multiple points using a laser tracker to obtain the projection points of the slide rail mating surface. The laser tracker is used to scan and measure the mating position of the arc ruler and the casting roll at multiple points to obtain the projection points of the mating surface of the casting roll. The position coordinates of the four corners of the arc ruler's side surface are obtained by measuring the four corners of the arc ruler's side surface using a laser tracker.

2. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 1, characterized in that, Adjusting the accuracy error of the arc ruler until the preset accuracy of the arc ruler is achieved includes: The accuracy error of the arc ruler is adjusted by machining until the preset accuracy of the arc ruler is achieved.

3. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 1, characterized in that, The accuracy of the slide rails on the offline calibration bench of the target continuous casting machine is measured and adjusted using a laser tracker until the preset accuracy of the slide rails is achieved, including: Multiple position coordinate points were obtained on the top surface and cylindrical surface of the slide rail using a laser tracker. Calculate the height difference between the coordinates of the top surface of the slide rail, and adjust the height of the slide rail so that the height difference is within a preset height. The cylindrical surface is obtained by fitting the coordinate points of the cylindrical surface of the slide rail, and the rotation center line of the cylindrical surface is calculated. The included angle and span between the two slide rails are calculated using the rotation center line, and the positions of the two slide rails are adjusted until the distance error between the endpoints on the same side of the two slide rails reaches the preset distance error, thus achieving the preset accuracy of the slide rails.

4. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 1, characterized in that, The accuracy of the support columns of the offline calibration bench for the target continuous casting machine is measured and adjusted using a laser tracker until the preset accuracy of the support columns is achieved, including: Multiple locations were selected at the top of each support column for measurement to obtain the height data of each support column. Based on the height data of the location points, the flatness of the top plane of each support column is calculated and adjusted until the preset accuracy of the support column is achieved.

5. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 1, characterized in that, When measuring and adjusting the accuracy of the support columns of the offline calibration bench for the target continuous casting machine using a laser tracker, the fitting accuracy between the support columns and the slide rails is also measured and adjusted, specifically including: Measure the height of the slide rail and calculate its average height; The height of a single support column is compared with the average height of the slide rail to obtain the height difference between the support column and the slide rail. Adjust the height difference between each support column and the slide rail individually until the matching accuracy between the support column and the slide rail is achieved.

6. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 5, characterized in that, Adjust the height difference between each support column and the slide rail individually until the required fit between the support column and the slide rail is achieved, including: The height difference between the support column and the slide rail can be adjusted by adding or removing shims under the top metal plate of the support column until the matching accuracy between the support column and the slide rail is achieved.

7. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 1, characterized in that, Before measuring and adjusting the arc-scale accuracy of the offline calibration bench of the target continuous casting machine based on a laser tracker, the following steps are also included: The laser tracker is set up at the target location and initialized and calibrated. The measurement area of ​​the offline calibration stand of the target continuous casting machine is cleaned. The arc ruler of the offline calibration stand of the target continuous casting machine is fixed in position.

8. The precision adjustment method for the offline calibration stand of a continuous casting machine according to claim 7, characterized in that, The measurement area of ​​the offline calibration stand for the target continuous casting machine is cleaned, including: The surface of the measurement area on the offline calibration stand of the target continuous casting machine is cleaned using an oil stain cleaner and oil-absorbing paper.

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