Precision adjusting method for off-line calibration rack of continuous casting machine

Abstract

The invention discloses a precision adjustment method for a continuous casting machine off-line calibration rack, and relates to the technical field of precision measurement, and the method comprises the steps: measuring and adjusting the arc ruler precision of a target continuous casting machine off-line calibration rack based on a laser tracker until the arc ruler precision reaches the preset arc ruler precision; the sliding rail precision of the target continuous casting machine off-line calibration rack is measured and adjusted based on the laser tracker until the sliding rail preset precision is reached; based on the laser tracker, the supporting column precision of the target continuous casting machine off-line calibration rack is measured and adjusted until the preset supporting column precision is reached; and when the precision of the arc ruler, the precision of the sliding rail and the precision of the supporting column all reach preset precision, precision adjustment of the offline calibration rack of the target continuous casting machine is completed. The technical blank of measuring the off-line calibration rack of the continuous casting machine through the laser tracker in the metallurgical industry is filled, and the precision of the off-line calibration rack of the continuous casting machine is practically improved.

Description

Technical Field

[0001] The present application relates to the field of precision measurement technology, and in particular to a precision adjustment method for an offline calibration stand of a continuous casting machine. Background Art

[0002] With the development of optical technology, the use of optical measurement technology has become very mature. As a landing product of the technology, laser trackers are increasingly widely used in manufacturing companies and precision equipment companies. Compared with theodolites and levels, their functions are more global. The measurement results can be analyzed through reverse modeling to express the position accuracy of the equipment very intuitively. In steel companies, in order to ensure the quality of arc connection, continuous casting machines are generally divided into two major parts for precise positioning. One is the overall frame, generally called the "banana beam", which is used to evaluate the arc connection quality of the frame part; the other is the accuracy evaluation of the "casting section" itself. Since they may be based on different offline calibration stands, the differences between the stands will cause differences in the thickness of the outer arc of the casting section, further affecting the arc connection accuracy between the casting sections of the continuous casting machine.

[0003] Traditional detection methods lack effective direct calibration methods for arc rulers, and generally need to be sent back to professional metrology institutes. The process is cumbersome and inconvenient. For slide rails, only height checks can be performed, and like support columns, measurements are made using a level, with poor accuracy. Slide rails are relatively simple and can only evaluate height, and are unable to make comprehensive evaluations of issues such as parallelism. Arc rulers lack effective and rapid evaluation methods, and overall height evaluation methods, including support column height measurement, can only rely on a level. Faced with today's 0.2mm arc connection accuracy requirements, the relative position accuracy requirements for support columns and slide rails are even more stringent, and it is clear that the level can no longer meet the requirements.

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

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] The present application proposes a method for adjusting the precision of an offline calibration stand of a continuous casting machine, comprising:

[0007] The arc scale accuracy 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 arc scale is achieved;

[0008] The slide rail accuracy of the target continuous casting machine offline calibration stand is measured and adjusted based on the laser tracker until the preset slide rail accuracy is achieved;

[0009] Based on the laser tracker, the support accuracy of the offline calibration stand of the target continuous casting machine is measured and adjusted until the preset support accuracy is achieved;

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

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

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

[0013] Establishing a projection reference plane according to the position coordinates of the four corners of the arc ruler side surface;

[0014] Performing plane fitting on the position coordinates of the four corners of the side of the arc ruler based on the projection reference plane to obtain a target plane;

[0015] Projecting the projection points of the slide rail matching surface and the projection points of the casting roll matching surface onto the target plane, so as to convert the three-dimensional measurement data into two-dimensional measurement data;

[0016] Perform multi-point straight line fitting on the projection points of the slide rail matching surface to obtain a reference line;

[0017] Obtaining the distance between the projection point of the casting roll matching surface and the reference line, and comparing the distance with a preset distance to obtain the accuracy error of the arc ruler;

[0018] The accuracy error of the arc ruler is adjusted until the preset accuracy of the arc ruler is reached.

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

[0020] Scan and measure the contact position between the arc ruler and the slide rail at multiple points based on a laser tracker to obtain the projection point of the slide rail matching surface;

[0021] Scan and measure the matching positions of the arc ruler and the casting roll at multiple points based on a laser tracker to obtain the projection points of the matching surface of the casting roll;

[0022] The four corners of the arc ruler side are measured based on a laser tracker to obtain the position coordinates of the four corners of the arc ruler side.

[0023] In a feasible implementation manner, adjusting the accuracy error of the arc ruler until the preset accuracy of the arc ruler is reached includes:

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

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

[0026] Based on the laser tracker, multiple position coordinate points are obtained on the top surface of the slide rail and the cylindrical surface respectively;

[0027] Calculating the height difference between the top surface position coordinate points of the slide rail, and adjusting the height of the slide rail so that the height difference is within a preset height;

[0028] A cylindrical surface is obtained by fitting the cylindrical surface position coordinate points of the slide rail, and a rotation centerline of the cylindrical surface is obtained by calculation;

[0029] The angle and span between the two slide rails are calculated through the rotation center line, and the position between the two slide rails is adjusted until the distance error between the end points on the same side of the two slide rails reaches a preset distance error, thereby achieving the preset accuracy of the slide rails.

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

[0031] A plurality of position points are selected at the top of each support column for measurement, so as to obtain the height data of each support position point respectively;

[0032] According to the position point height data, the flatness of the top plane of each support column is calculated and adjusted respectively until the preset support accuracy is achieved.

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

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

[0035] Compare the height of a single support with the average height of the slide rail to obtain the height difference between the support and the slide rail;

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

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

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

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

[0040] Setting up the laser tracker at the target position and initializing and calibrating the laser tracker;

[0041] Cleaning the to-be-measured portion of the target continuous casting machine offline calibration stand;

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

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

[0044] The surface of the to-be-measured portion of the target continuous casting machine offline calibration stand is cleaned using an oil cleaning agent and oil absorbing paper.

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

[0046] The precision adjustment method of the offline calibration stand of the continuous casting machine proposed in this application, and other advantages, objectives and features of this application will be reflected in part through the following description, and in part will also be understood by technical personnel in this field through research and practice of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0048] Figure 1 A schematic diagram of a process for adjusting the precision of an offline calibration stand for a continuous casting machine provided in an embodiment of the present application;

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

[0050] Figure 3 A cross-sectional view of a slide rail provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through 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 article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0053] In the prior art, the slide rail is relatively simple and can only evaluate the height, but cannot comprehensively evaluate issues such as parallelism. The arc ruler lacks an effective and rapid evaluation method. The overall height evaluation method, including the height measurement of the support column, can only rely on a level. Faced with the current arc connection accuracy requirement of 0.2mm, the relative position accuracy requirements for the support column and the slide rail are more stringent, and it is obvious that the level can no longer meet the demand. In order to fill the technical gap of the metallurgical industry in measuring the offline calibration stand of the continuous casting machine through a laser tracker, and effectively improve the accuracy of the stand, this application provides an arc ruler accuracy measurement and evaluation method, a slide rail accuracy measurement and evaluation method, and a support column accuracy and a support column and slide rail matching accuracy measurement and evaluation method.

[0054] See also Figure 1 , is a schematic flow diagram of a precision adjustment method for an offline calibration stand of a continuous casting machine provided in an embodiment of the present application, which may specifically include:

[0055] S110, measuring and adjusting the arc scale accuracy of the offline calibration stand of the target continuous casting machine based on a laser tracker until the preset arc scale accuracy is reached.

[0056] S120, measuring and adjusting the slide rail accuracy of the offline calibration stand of the target continuous casting machine based on a laser tracker until the preset slide rail accuracy is reached.

[0057] S130, measuring and adjusting the support accuracy of the offline calibration stand of the target continuous casting machine based on the laser tracker until the preset support accuracy is reached.

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

[0059] For example, a continuous casting machine is generally composed of 15 to 20 casting sections, in which "casting rollers" are arranged in an arc shape according to a certain arc. The most important spatial accuracy indicator of a continuous casting machine is arc connection. This is whether these numerous casting rollers are strictly distributed in the designed arc shape (bend section) or straight line shape (flat section). Figure 2 As shown in the figure, the offline calibration stand for the continuous casting machine consists of an arc ruler slide rail 1, an arc ruler 2, the lower half of the casting section 3 and a support column 4. When calibrating the size of a single section, the upper and lower parts will be separated, and the lower half will be placed on the offline calibration stand, and the arc ruler 2 will be used to detect the arc accuracy within the section. Therefore, for this part of the offline calibration stand, the accuracy of the arc ruler, the accuracy of the slide rail and the accuracy of the support column affect the calibration accuracy.

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

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

[0062] Establishing a projection reference plane according to the position coordinates of the four corners of the arc ruler side surface;

[0063] Performing plane fitting on the position coordinates of the four corners of the side of the arc ruler based on the projection reference plane to obtain a target plane;

[0064] Projecting the projection points of the slide rail matching surface and the projection points of the casting roll matching surface onto the target plane, so as to convert the three-dimensional measurement data into two-dimensional measurement data;

[0065] Perform multi-point straight line fitting on the projection points of the slide rail matching surface to obtain a reference line;

[0066] Obtaining the distance between the projection point of the casting roll matching surface and the reference line, and comparing the distance with a preset distance to obtain the accuracy error of the arc ruler;

[0067] The accuracy error of the arc ruler is adjusted until the preset accuracy of the arc ruler is reached.

[0068] Exemplarily, a laser tracker is used to scan and measure multiple points of the position where the arc ruler contacts 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, the position where the arc ruler and the casting roll match is also scanned and measured at multiple points. Since the matching accuracy between the arc ruler and the casting roll is crucial to the performance of the entire system, it is necessary to understand the shape and size of this matching position in detail.

[0070] Measure the position coordinates of the four corners of the arc ruler. Through these four points, a projection reference surface can be established. This reference surface will be used in the subsequent steps to convert 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, plane fitting is performed through mathematical methods. This will yield a plane that is as close to the actual situation as possible, serving as a reference for subsequent projections.

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

[0073] For the points obtained by projecting the slide rail mating surface, multi-point straight line fitting is performed, so that a reference line can be obtained, which represents the shape characteristics of the slide rail mating surface.

[0074] Compare the points obtained by projecting the mating surfaces of different casting rolls with the reference line and calculate the distances from these points to the reference line. Then, compare these distances 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, obtaining scanning measurement data of the arc ruler based on a laser tracker includes:

[0076] Scan and measure the contact position between the arc ruler and the slide rail at multiple points based on a laser tracker to obtain the projection point of the slide rail matching surface;

[0077] Scan and measure the matching positions of the arc ruler and the casting roll at multiple points based on a laser tracker to obtain the projection points of the matching surface of the casting roll;

[0078] The four corners of the arc ruler side are measured based on a laser tracker to obtain the position coordinates of the four corners of the arc ruler side.

[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 and right position in a specific measurement space. The Y coordinate reflects the up and down position. The Z coordinate reflects the front and back position. These coordinate values ​​can accurately describe the position of the contact point between the arc ruler and the slide rail in space.

[0081] Shape feature data: Curvature information: The local curvature of the contact position can be calculated through the coordinates of multiple points. This is very important for understanding the degree of curvature of the arc scale in contact with the slide rail, and helps to judge the uniformity and stability of the contact. Surface profile data: Multi-point scanning can outline the surface profile of the contact position. This includes the undulations and bumps of the surface, which can be used to evaluate the flatness and smoothness of the contact.

[0082] Relative position data: Distance between points: The distance between multiple points measured can reflect the dimensional changes of the contact position 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 changes may mean unstable contact or local deformation. Distance from a point to a specific reference plane or axis: Using a fixed reference plane or axis as a reference, measure the distance from each scan point to the reference. This can help determine the relative position and posture of the arc ruler on the slide rail, and whether there is deviation or tilt.

[0083] The following data can be obtained by multi-point scanning measurement of the matching position of the arc ruler and the casting roll:

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

[0085] Shape feature data: Profile information of the mating surface: Understand the shape of the mating surface, including whether there are irregular protrusions, depressions or deformations. This is crucial to assess the tightness and accuracy of the fit. Curvature and arc information: Determine the curvature and arc of the mating surface to determine the degree of shape matching between the arc ruler and the casting roll. If the curvature or arc does not match, it may affect the accuracy and quality of the casting process.

[0086] Dimensional data: Fit clearance: By measuring multiple points, the size of the fit clearance between the arc ruler and the casting roll can be calculated. This is very important to ensure stability and accuracy during the casting process. Too large or too small a clearance may cause problems. Dimensions such as length, width and height of the fitting surface: Accurately measure the dimensions of the fitting surface to compare with the design requirements and determine whether it meets the standards. At the same time, the dimensional data can also be used for subsequent quality control and adjustments.

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

[0088] In some examples, adjusting the accuracy error of the arc ruler until the preset accuracy of the arc ruler is reached includes:

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

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

[0091] Based on the laser tracker, multiple position coordinate points are obtained on the top surface of the slide rail and the cylindrical surface respectively;

[0092] Calculating the height difference between the top surface position coordinate points of the slide rail, and adjusting the height of the slide rail so that the height difference is within a preset height;

[0093] A cylindrical surface is obtained by fitting the cylindrical surface position coordinate points of the slide rail, and a rotation centerline of the cylindrical surface is obtained by calculation;

[0094] The angle and span between the two slide rails are calculated through the rotation center line, and the position between the two slide rails is adjusted until the distance error between the end points on the same side of the two slide rails reaches a preset distance error, thereby achieving the preset accuracy of the slide rails.

[0095] For example, in order to facilitate equipment maintenance, most slide rails have been upgraded in appearance, such as Figure 3 As shown, in combination with this common new modification of the slide rail, the precision measurement adjustment method provided by the present application is to evenly select points on the top surface 11 of the slide rail: the purpose is to obtain information at different positions on the top surface of the slide rail. By selecting multiple points evenly distributed on the top surface, the state of the top surface of the slide rail can be more comprehensively understood. These points will be used for subsequent analysis of the horizontality of the slide rail.

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

[0097] Analyze the horizontality of the slide rail by taking points on the top surface 11 of the slide rail: Using the coordinate information of the points taken on the top surface 11 of the slide rail, the height difference of these points can be calculated. By analyzing these height differences, it can be determined whether the top surface 11 of the slide rail is horizontal. If the height difference is large, it means that the slide rail is not horizontal and needs to be adjusted.

[0098] Adjust the height and repeat the previous step to make the height difference uniform to within 0.02mm: According to the unevenness of the top surface 11 of the slide rail analyzed in the previous step, adjust the height of the slide rail. After adjustment, perform the previous step again, that is, re-analyze the horizontality of the top surface 11 of the slide rail. Repeat this process until the height difference of each point on the top surface 11 of the slide rail is within 0.02mm to meet the high precision requirements.

[0099] Cylindrical surface fitting using the points obtained on the cylindrical surface 12 of the slide rail: Cylindrical surface fitting is performed using the points obtained on the cylindrical surface 12 of the slide rail. Cylindrical surface fitting is a mathematical method that uses the coordinate information of these points to find a cylindrical surface equation that is closest to these points. This fitted cylindrical surface will be used for subsequent operations such as calculating the centerline of the cylinder rotation.

[0100] The cylindrical surface obtained by calculation is further calculated to obtain the cylindrical rotation centerline. After fitting the cylindrical surface, the rotation centerline of the cylindrical surface can be calculated by mathematical methods. The cylindrical rotation centerline is the geometric center axis of the cylindrical surface, which is very important for analyzing parameters such as the angle between the two tracks and the span.

[0101] Using the calculated centerline of rotation of the cylinder, the angle and span between the two rails can be analyzed. The angle refers to the angle between the centerlines of rotation of the two rails, and the span refers to the horizontal distance between the two rails. Through further adjustment, the difference between the distance at both ends and the design value is within ±0.02mm. If the analyzed angle and span of the two rails deviate greatly from the design value, it can be corrected by adjusting the position of the rails. Then re-perform the cylindrical surface fitting, calculate the centerline of rotation, and analyze the angle and span. Repeat this process until the difference between the distance at both ends and the design value is within ±0.02mm to meet the high-precision requirements.

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

[0103] A plurality of position points are selected at the top of each support column for measurement, so as to obtain the height data of each support position point respectively;

[0104] According to the position point height data, the flatness of the top plane of each support column is calculated and adjusted respectively until the preset support accuracy is achieved.

[0105] Exemplarily, firstly, multi-point sampling is performed on the top of a single supporting column: multiple positions are selected on the top of each supporting column for measurement, and the height data of these positions are obtained. In this way, the situation of the top plane of the column can be more comprehensively understood. Perform a flatness analysis, and the flatness shall not be greater than 0.05 mm: calculate the flatness of the top plane of the column based on the data obtained from multi-point sampling. Flatness is an indicator to measure the flatness of a plane. Here, the flatness is required not to exceed 0.05 mm to ensure that the top plane of the column is relatively flat. The height of the column is characterized by the center point of the plane: the center point of the top plane of the column is determined, and the height of this center point is used to represent the height of the entire column. This can simplify the subsequent comparison and adjustment process. Similarly, the flatness of the other three columns is detected and adjusted: according to the same steps, the same multi-point sampling, flatness analysis and determination of the column height operations are performed on the other three supporting columns.

[0106] In some examples, when the support accuracy of the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker, the matching accuracy of the support column and the slide rail is also measured and adjusted, specifically including:

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

[0108] Compare the height of a single support with the average height of the slide rail to obtain the height difference between the support and the slide rail;

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

[0110] Exemplarily, 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 column according to the actual measured height difference and design requirements. The goal of the adjustment is to make the height difference between the column and the slide rail no more than 0.02 mm compared to the design size. Repeat the same operation for the other three columns, adjusting their heights one by one, so that the height difference between the four columns and the slide rail meets the design requirements.

[0112] In some examples, the height difference between each support and the slide rail is adjusted respectively until the matching accuracy between the support and the slide rail is achieved, including:

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

[0114] For example, check the equipment drawings to understand the height relationship between the slide rail and the column required by the design. According to the height difference actually measured and the design requirements, add or remove shims under the metal plate on the top surface of the column to adjust the height of the column.

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

[0116] Setting up the laser tracker at the target position and initializing and calibrating the laser tracker;

[0117] Cleaning the to-be-measured portion of the target continuous casting machine offline calibration stand;

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

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

[0120] In some examples, the cleaning process of the to-be-measured portion of the target continuous casting machine offline calibration stand includes:

[0121] The surface of the to-be-measured portion of the target continuous casting machine offline calibration stand is cleaned using an oil cleaning agent and oil absorbing paper.

[0122] The technical solution of the present application is further described in detail below through specific embodiments.

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

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

[0125] Step 2: Use oil cleaning agent and oil absorbing paper to treat the tested part to ensure the surface is clean;

[0126] Step 3: Under the premise of minimizing the distance measurement, fix the position of the arc ruler;

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

[0128] Step 5: Perform multi-point scanning on the matching positions of the arc ruler and the casting roller;

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

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

[0131] Step 8: Project the remaining multiple points onto the plane constructed in step 7 to convert the three-dimensional problem into a two-dimensional problem;

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

[0133] Step 10: Compare the projection points of different casting roll matching surfaces with the lines obtained in step 6, further obtain the distance, and compare with the drawing to evaluate the error;

[0134] Step 11: Machining the arc ruler with out-of-tolerance, and then repeating 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: Evenly select points on the cylindrical surface of the slide rail;

[0137] Step 14: Analyze the horizontality of the slide rail through the points obtained on the top surface of the slide rail;

[0138] Step 15: Adjust the height and repeat step 14 to make the height difference uniform within 0.02mm;

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

[0140] Step 17: Calculate the cylindrical surface and further calculate the center line of rotation of the cylinder;

[0141] Step 18: Analyze the angle between the two tracks and the span through the rotation center line;

[0142] Step 19: Repeat steps 16 to 18 through further adjustment to make the distance between the two ends, compared with the design value, within ±0.02mm;

[0143] Step 20, by performing multi-point sampling on the top of a single support column;

[0144] Step 21: Perform flatness analysis. The flatness shall not be greater than 0.05 mm.

[0145] Step 22: Use the center point of the plane to represent the height of the column;

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

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

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

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

[0150] It should be noted that the above embodiments are only the best examples and are not limitations on the implementation methods of the present application.

[0151] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0152] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

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

Claims

1. A method for adjusting the precision of an offline calibration stand for a continuous casting machine, characterized in that: include: The arc scale accuracy 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 arc scale is achieved; The slide rail accuracy of the target continuous casting machine offline calibration stand is measured and adjusted based on the laser tracker until the preset slide rail accuracy is achieved; Based on the laser tracker, the support accuracy of the offline calibration stand of the target continuous casting machine is measured and adjusted until the preset support accuracy is achieved; When the arc scale accuracy, the slide rail accuracy and the support accuracy all reach the preset accuracy, the precision adjustment of the target continuous casting machine offline calibration stand is completed.

2. The precision adjustment method of the offline calibration stand of the continuous casting machine according to claim 1 is characterized in that: The arc scale accuracy of the offline calibration stand of the target continuous casting machine is measured and adjusted based on the laser tracker until the preset arc scale accuracy is achieved, including: The scanning measurement data of the arc ruler is obtained based on the laser tracker; the scanning measurement data of the arc ruler includes the position coordinates of the projection points of the slide rail matching surface, the projection points of the casting roll matching surface and the four corners of the arc ruler side surface; Establishing a projection reference plane according to the position coordinates of the four corners of the arc ruler side surface; Performing plane fitting on the position coordinates of the four corners of the side of the arc ruler based on the projection reference plane to obtain a target plane; Projecting the projection points of the slide rail matching surface and the projection points of the casting roll matching surface onto the target plane, so as to convert the three-dimensional measurement data into two-dimensional measurement data; Perform multi-point straight line fitting on the projection points of the slide rail matching surface to obtain a reference line; Obtaining the distance between the projection point of the casting roll matching surface and the reference line, and comparing the distance with a preset distance to obtain the accuracy error of the arc ruler; The accuracy error of the arc ruler is adjusted until the preset accuracy of the arc ruler is reached.

3. The precision adjustment method of the offline calibration stand of the continuous casting machine according to claim 2, characterized in that: The scanning measurement data of the arc ruler is obtained based on a laser tracker, including: Scan and measure the contact position between the arc ruler and the slide rail at multiple points based on a laser tracker to obtain the projection point of the slide rail matching surface; Scan and measure the matching positions of the arc ruler and the casting roll at multiple points based on a laser tracker to obtain the projection points of the matching surface of the casting roll; The four corners of the arc ruler side are measured based on a laser tracker to obtain the position coordinates of the four corners of the arc ruler side.

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

5. The precision adjustment method of the offline calibration stand of a continuous casting machine according to claim 1, characterized in that: The slide rail accuracy of the target continuous casting machine offline calibration stand is measured and adjusted based on the laser tracker until the preset slide rail accuracy is achieved, including: Based on the laser tracker, multiple position coordinate points are obtained on the top surface of the slide rail and the cylindrical surface respectively; Calculating the height difference between the top surface position coordinate points of the slide rail, and adjusting the height of the slide rail so that the height difference is within a preset height; A cylindrical surface is obtained by fitting the cylindrical surface position coordinate points of the slide rail, and a rotation centerline of the cylindrical surface is obtained by calculation; The angle and span between the two slide rails are calculated through the rotation center line, and the position between the two slide rails is adjusted until the distance error between the end points on the same side of the two slide rails reaches a preset distance error, thereby achieving the preset accuracy of the slide rails.

6. The precision adjustment method of the offline calibration stand of a continuous casting machine according to claim 1, characterized in that: Based on the laser tracker, the support accuracy of the target continuous casting machine offline calibration stand is measured and adjusted until the preset support accuracy is achieved, including: A plurality of position points are selected at the top of each support column for measurement, so as to obtain the height data of each support position point respectively; According to the position point height data, the flatness of the top plane of each support column is calculated and adjusted respectively until the preset support accuracy is achieved.

7. The precision adjustment method of the offline calibration stand of a continuous casting machine according to claim 1, characterized in that: When measuring and adjusting the support accuracy of the offline calibration stand of the target continuous casting machine based on the laser tracker, the matching accuracy of the support column and the slide rail is also measured and adjusted, including: Measure the height of the slide rails and calculate the average height of the slide rails; Compare the height of a single support with the average height of the slide rail to obtain the height difference between the support and the slide rail; Adjust the height difference between each support and the slide rail respectively until the matching accuracy between the support and the slide rail is achieved.

8. The precision adjustment method of the offline calibration stand of a continuous casting machine according to claim 7, characterized in that: Adjust the height difference between each support and the slide rail until the matching accuracy between the support and the slide rail is achieved, including: The height difference between the support and the slide rail is adjusted by adding or removing shims under the top metal plate of the support until the matching accuracy between the support and the slide rail is achieved.

9. The precision adjustment method of 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 stand of the target continuous casting machine based on the laser tracker, it also includes: Setting up the laser tracker at the target position and initializing and calibrating the laser tracker; Cleaning the to-be-measured portion of the target continuous casting machine offline calibration stand; The arc ruler of the offline calibration stand of the target continuous casting machine is fixed in position.

10. The precision adjustment method of the offline calibration stand of a continuous casting machine according to claim 9, characterized in that: The part to be measured of the offline calibration stand of the target continuous casting machine is cleaned, including: The surface of the to-be-measured portion of the target continuous casting machine offline calibration stand is cleaned using an oil cleaning agent and oil absorbing paper.

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