Roller system precision determination method

Abstract

The application discloses a kind of roll precision determination methods, according to the first included angle of the rotary center line of reference roll and horizontal plane and the second included angle of the rotary center line of work roll and horizontal plane, and the third included angle of the rotary center line of reference roll and the true north direction line and the fourth included angle of the rotary center line of work roll and the true north direction line, the difference value, adjust the levelness and perpendicularity of work roll to meet levelness standard and perpendicularity standard.It is convenient to operate, under the condition of production line parking, the service roll (i.e.work roll) on line is detected, the deviation of measured roll (i.e.work roll) and reference roll is determined, and the deviation of production line running direction and ground level.

Description

Technical Field

[0001] This invention relates to Measurement The field of technology relates, in particular to a method for determining the accuracy of a roller system. Background Technology

[0002] In metallurgical production lines, especially rolling production lines, the spatial precision positioning of roller systems is becoming increasingly important, and the positioning accuracy requirements are getting higher and higher, with the highest requirement reaching 0.05mm / m. Moreover, the number of rollers is large. Taking a steel plant as an example, a single cold rolling production line can have more than 300 rollers, and there can be more than ten such production lines in the whole plant. Including other roller systems in other processes, the total spatial precision monitoring requirements can reach 5,000 roller systems. Therefore, how to achieve rapid and high-precision measurement is a difficult problem in the industry. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a method for determining the accuracy of a roller system that overcomes or at least partially solves the above problems.

[0004] A method for determining the accuracy of a roller system is provided, including:

[0005] The measuring device reciprocates around the roller surface of the reference roller in the circumferential direction to measure the rotation center line of the reference roller, wherein the horizontality and verticality of the reference roller meet the set horizontality standard and verticality standard.

[0006] The measuring equipment reciprocates circumferentially around the surface of the work roll on the roller production line to measure the rotation center line of the work roll;

[0007] Based on the difference between the first angle between the rotation center line of the reference roller and the horizontal plane and the second angle between the rotation center line of the working roller and the horizontal plane, and the difference between the third angle between the rotation center line of the reference roller and the true north direction line and the fourth angle between the rotation center line of the working roller and the true north direction line, adjust the horizontality and verticality of the working roller to meet the horizontality and verticality standards.

[0008] Optionally, based on the difference between the first included angle and the second included angle, as well as the difference between the third included angle and the fourth included angle, the deviation of the rotation center line of the working roll relative to the rotation center line of the reference roll is obtained. The working roll is then adjusted according to the deviation until the working roll meets the horizontal and vertical standards.

[0009] Optionally, the measuring device includes a gyroscope, which measures the trajectory of the measuring device moving around the roller surface of the reference roller, and obtains the rotation center line of the reference roller based on the axis of the cylindrical surface where the trajectory is located.

[0010] Optionally, the first included angle is the angle between the rotation center line of the reference roller and the horizontal plane pointed to by the gyroscope; the third included angle is the angle between the rotation center line of the reference roller and the true north direction line pointed to by the gyroscope.

[0011] Optionally, the gyroscope measures the trajectory of the measuring device moving around the surface of the work roller, and the rotation center line of the work roller is obtained based on the axis of the cylindrical surface where the trajectory is located.

[0012] Optionally, the second included angle is the angle between the rotation center line of the working roller and the horizontal plane pointed to by the gyroscope; the fourth included angle is the angle between the rotation center line of the working roller and the true north direction line pointed to by the gyroscope.

[0013] Optionally, the standard for the levelness of the reference roller is: the rotation center line of the reference roller is parallel to the XOY plane of the preset coordinate system; the standard for the verticality of the reference roller is: the rotation center line of the reference roller is perpendicular to the X-axis of the preset coordinate system; wherein, the X-axis of the preset coordinate system is parallel to the line connecting the inlet reference point and the outlet reference point of the roller production line, and the XOY plane of the preset coordinate system is a horizontal plane.

[0014] Optionally, the standard for the horizontality of the work roll is: the rotation center line of the work roll is parallel to the XOY plane of the preset coordinate system; the standard for the verticality of the work roll is: the rotation center line of the work roll is perpendicular to the X-axis of the preset coordinate system.

[0015] Optionally, the laser tracker monitors the deviation of the rotation center line of the reference roller from the XOY plane and the X-axis, and adjusts the reference roller according to the deviation to ensure that the horizontality and verticality of the reference roller meet the horizontality standard and the verticality standard.

[0016] Optionally, in the levelness and perpendicularity standards of the reference roll, the parallelism tolerance shall not exceed 0.002 and the perpendicularity tolerance shall not exceed 0.002; in the levelness and perpendicularity standards of the work roll, the parallelism tolerance shall not exceed 0.05 and the perpendicularity tolerance shall not exceed 0.05.

[0017] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0018] The roller system accuracy determination method provided in this invention establishes a reference roller, positions it according to the reference coordinate axis of the roller system production line, and adjusts its position on the reference coordinate axis according to the horizontal and verticality standards. Zero-position calibration is achieved using the deflection angles of the reference roller's rotation center line, the horizontal plane, and the true north direction as a reference. The deflection information of the working roller is obtained by measuring these angles. This facilitates the adjustment of the working roller to meet the horizontal and verticality requirements according to the reference roller's standards. The method is easy to operate. Under production line shutdown conditions, the method inspects the in-service roller system (i.e., working rollers) on the line, measuring the deviation between the tested roller (i.e., working roller) and the reference roller, as well as the deviation of the production line's running direction from the horizontal. This invention provides a fast and efficient measurement of the horizontal and verticality of roller system equipment in metallurgical production lines. The average measurement time for a single roller is less than 10 seconds, significantly reducing the measurement time compared to the existing technology that uses optical instruments to measure roller systems, which takes more than 10 minutes on average. This greatly improves production efficiency.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] 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 the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 This is a flowchart illustrating the determination of roller system accuracy in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the measuring roller system of the measuring device in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram illustrating the relationship between the standard coordinate system and the roller production line in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram showing the angle between the rotation center line, the XOY plane, and the X-axis in an embodiment of the present invention. Detailed Implementation

[0025] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings.

[0026] The accompanying drawings illustrate various structural schematics according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0027] To better understand the above technical solutions, the following will describe the above technical solutions in detail with reference to specific implementation methods. It should be understood that the embodiments of this disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0028] This invention provides a method for determining the accuracy of a roller system. Please refer to [the relevant documentation]. Figure 1 , Figure 1 The flowchart for determining relationship precision in an embodiment of the present invention includes:

[0029] S1. The measuring device reciprocates around the roller surface of the reference roller in the circumferential direction to measure the rotation center line of the reference roller, wherein the horizontality and verticality of the reference roller meet the set horizontality standard and verticality standard.

[0030] S2. The measuring equipment reciprocates around the circumferential surface of the working roll on the roller production line to measure the rotation center line of the working roll;

[0031] S3. Based on the difference between the first angle between the rotation center line of the reference roller and the horizontal plane and the second angle between the rotation center line of the working roller and the horizontal plane, and the difference between the third angle between the rotation center line of the reference roller and the true north direction line and the fourth angle between the rotation center line of the working roller and the true north direction line, adjust the horizontality and verticality of the working roller to meet the horizontality and verticality standards.

[0032] Taking a production line for producing strip steel as an example, the spatial accuracy positioning problem of roller system equipment covers two indicators: horizontality and verticality. Horizontality refers to whether the rotation center line of the roller system is parallel to the horizontal plane of the earth, and verticality refers to whether the rotation center line of the roller system is perpendicular to the production line, i.e., the running direction of the strip steel product.

[0033] Existing technical solutions are all based on machine-side reference points set up next to the roller system being tested. The machine-side reference points appear in pairs, and the line connecting the two points is parallel to the product running direction. Then, the reference system and the tested part are sampled by optical instruments or by "hanging a steel wire" to further obtain the relationship between the tested equipment and the line connecting the machine-side reference points, that is, whether the rotation center of the roller system is perpendicular to the line connecting the machine-side reference points.

[0034] The specific implementation plan includes:

[0035] ① Steel wire measurement method

[0036] A steel wire is erected based on a reference point near the machine. A pendulum rod is connected to the roller shaft. By observing the swing of the pendulum rod, the change in contact between the micrometer at the 3 o'clock and 9 o'clock positions and the steel wire is observed. Verticality is calculated based on this, while horizontality is measured using a level. The steel wire measurement method is inaccurate, inefficient, complex, and requires highly skilled personnel. The steel wire used in this method cannot be reused, and alignment with the reference point using a plumb bob is crucial. Strict control over the technique is required at every step. Currently, on-site implementation has revealed significant measurement errors due to operators' lack of understanding of the principles and procedures.

[0037] ② Laser tracker / total station surveying

[0038] Optical instruments measure the coordinates of at least three points on the roller end face. Using the principle of three points being coplanar, the normal vector of the roller end face is calculated, and then the production line's baseline is obtained. Subsequently, the perpendicularity between the roller and the baseline, and the horizontality between the roller and the ground plane are calculated. The measurement methods of laser trackers and total stations are based on similar principles; both use such optical instruments and tooling to directly obtain the coordinates of reference points, and then perform spatial accuracy reconstruction by sampling key positions of the measured equipment.

[0039] While optical instrument measurement simplifies the measurement process, it is time-consuming. The time spent on instrument setup, tooling placement, and instrument initialization is unavoidable, with single-roller measurement averaging over 10 minutes. Furthermore, it requires the production line to stop, consuming all maintenance time and impacting production efficiency. During equipment adjustments, the precision optical instruments are in standby mode, which can easily cause positional creep, introducing measurement errors.

[0040] Using this invention, a reference roller conforming to the set standards for horizontality and verticality can be arranged during normal operation of the roller production line. Zero-position calibration is achieved by sampling using the reference roller. Before stopping the production line, step S1 is executed. Then, after stopping the production line, operations S2 and S3 are executed to detect the working rollers on the roller production line. The deviation between the working roller and the reference roller represents the deviation of the production line's running direction from the horizontal plane. Based on this deviation, the working roller is adjusted to meet the set standards for horizontality and verticality, thus adjusting the production line's running direction to the standard. Compared to the aforementioned wire measurement method and optical instrument measurement method, this method enables rapid measurement of roller-type equipment in metallurgical production lines, specifically meaning shorter equipment maintenance time (i.e., shorter downtime) and convenient operation.

[0041] like Figure 2This is a schematic diagram of the measuring roller system of the measuring device in an embodiment of the present invention. Taking the measurement process of the reference roller in step S1 as an example, the measuring device 1 reciprocates circumferentially on the roller surface of the reference roller 2. Since the roller surface of the reference roller 2 is a cylinder, the measuring device 1 obtains an arc-shaped motion trajectory based on the rotational speed and angle during the reciprocating movement on the roller surface. The cylindrical surface on which the motion trajectory is located is coaxial with the roller surface of the reference roller 2. The rotation center line of the reference roller can be obtained based on the axis of the cylindrical surface on which the motion trajectory is located. The principle of the measuring device measuring the rotation center line of the work roller in step S2 is the same as the principle of measuring the reference roller.

[0042] Before performing operation S1, the height and level of the reference roller need to be adjusted to the standard. The schematic diagram of the reference roller shows that a connector is rotatably mounted at the end of the reference roller 2's shaft. The upper end of the connector is coaxially sleeved outside the shaft of the reference roller 2. Horizontal knobs 3 are located at both ends of the connector, and a vertical knob 4 is located at the lower end. A support 5 is installed outside the reference roller 2. The support 5 includes two parallel vertical beams and a horizontal beam positioned between the two vertical beams. The lower end of the connector is located between the two vertical beams and above the horizontal beam. The horizontal knob 3 is screwed to the vertical beams and contacts the side of the connector. Rotating the horizontal knob 3 allows the end of the reference roller 2 to move horizontally, facilitating the adjustment of the reference roller 2's verticality. The vertical knob 4 is screwed to the horizontal beam and contacts the bottom of the connector. Rotating the vertical knob 4 adjusts the height of the end of the reference roller 2, facilitating the adjustment of the reference roller 2's level. It should be noted that there is one horizontal knob on each side of the connector, and multiple vertical knobs, but two are preferable. Its structural features include the ability to adjust the horizontality (relative horizontal height between the two ends of the roller body) and the verticality (angle of the roller body relative to the direction of production line operation, ideally a vertical relationship) through knobs or other means.

[0043] like Figure 3 As shown, the roller production line 6 consists of work rollers 7 arranged sequentially. Before executing operation S1, a reference roller 2 is placed outside the roller production line 6. First, a standard coordinate system is determined, which includes the X-axis, Y-axis, and Z-axis. Figure 3 The Z-axis is not shown. The line connecting the X-axis of the preset standard coordinate system with the entry and exit reference points of the roller production line (i.e., Figure 3 The direction indicated by the arrow in line 6 is parallel, and the XOY plane formed by the X-axis and Y-axis is a horizontal plane. It should be noted that... Figure 3 This only shows a section of the roller production line and does not represent the entire production line. Figure 3 The specific structures of the working roll and the reference roll are not given; it is only shown that the relative installation positions of the reference roll's rotation center line are perpendicular to the production line's running direction.

[0044] The standard for the horizontality of the reference roller is that its rotation centerline is parallel to the XOY plane of the preset standard coordinate system; the standard for the verticality of the reference roller is that its rotation centerline is perpendicular to the X-axis of the preset coordinate system. After obtaining the rotation centerline of the reference roller, it is necessary to calculate the angles it makes with the XOY plane and the X-axis in the standard coordinate system. Based on these angles, the reference roller is adjusted to meet the horizontal and verticality standards. In other words, the reference roller must be adjusted to be parallel to the horizontal plane and perpendicular to the running direction of the roller system production line. Only in this way can it serve as the reference for adjusting the working rollers of the roller system production line.

[0045] like Figure 4 As shown, a segment of the rotation center line is taken as an example segment. For ease of understanding, the intersection point of this example segment with the horizontal plane XOY is A. The segment AB is this example segment, and the projection of segment AB onto the XOY plane is segment AC. The angle α between segment AB and segment AC is the angle between segment AB and the XOY plane, which is the angle between the rotation center line and the XOY plane, and also the angle between the rotation center line and the horizontal plane. A straight line k parallel to the X-axis is drawn on the XOY plane, such that the intersection point of line k and segment AB is A. The angle β between segment AB and line k is the angle between segment AB and the X-axis, which is the angle between the rotation center line and the X-axis.

[0046] In the subsequent operation S3, the principle of determining the angle between the rotation center line of the reference roll and the horizontal plane and the true north direction line is similar to the above. As long as a line parallel to the true north direction line is drawn at point A, the angle between the rotation center line and the true north direction line can be obtained from the angle between line segment AB and the parallel line. The calculation process of the angle is implemented by the calculation module in the measuring device. Whether it is the reference roll or the working roll, the principle of measuring the angle between its rotation center line and the horizontal plane and the true north direction line or the X-axis of the standard coordinate system is the same.

[0047] A laser tracker is used to monitor the deviation of the rotation centerline of the reference roller from the XOY plane and the X-axis, that is... Figure 4 The α and β angles are used to adjust the position of the reference roller according to the horizontal standard of α angle being 180° and the vertical standard of β angle being 90°. The laser tracker obtains the equation of the rotation center line of the reference roller 2 in the reference coordinate system. Based on the equation and the equations of the XOY plane and the X-axis, the deflection angles α and β are calculated. The reference roller is adjusted according to the deflection so that the rotation center line of the reference roller 2 meets the horizontal standard of being parallel to the XOY plane and the vertical standard of being perpendicular to the X-axis.

[0048] In the standard for the levelness of the reference roller, the parallelism tolerance does not exceed 0.002; in the standard for the perpendicularity of the reference roller, the perpendicularity tolerance does not exceed 0.002. The laser tracker is used in a standard manner. Establishing a standard coordinate system using the measurement results from the laser tracker, obtaining the equation of the rotation centerline of the reference roller, and the offset of the rotation centerline of the reference roller from the XOY plane and the X-axis are all standard functions of the laser tracker, and the operation and calculation process will not be detailed here. The laser tracker adjusts the reference roller by sampling the reference point near the machine, achieving a levelness and perpendicularity of the reference roller ≤ 0.02 mm / m, providing a horizontal reference and a vertical reference for operating the measuring equipment from S1 to S3.

[0049] Taking a strip rolling mill production line as an example, the above operation actually includes the following steps:

[0050] Step 1: Set up the reference roller in a location with good visibility, where the laser tracker can be easily set up to simultaneously observe the position of the reference roller body and the reference point next to the machine.

[0051] Step 2: Set up the station at a location with good line of sight, turn on the laser tracker, and, assuming the horizontal alignment is compromised (not sufficient for initial calibration), input the initialization command. When the horizontal alignment is compromised, the laser tracker will alarm upon inputting the initialization command.

[0052] Step 3: After the laser tracker alarms horizontally, adjust the horizontal level to ensure that the horizontal fluctuation value is ≤0.002arcsec.

[0053] Step 4: After leveling the laser tracker, initialize it and track its horizontal changes throughout the entire process, ensuring the changes do not exceed ≤0.002 arcsec. This operation enables the laser tracker to maintain a horizontal position.

[0054] Step 5: Sampling of entrance and exit reference points (the laser tracker samples two machine-side reference points at the entrance and exit on one side of the production line to obtain the direction of the production line), and sampling of the roller body (the prism is attached to several points, and the laser tracker scans the roller body).

[0055] Step 6: Adjust the position and direction of the dot of the laser tracker's three-dimensional coordinate system so that the X-axis points in the direction of the roller production line.

[0056] Step 7: Using the new coordinate system Y-axis as the initial iteration condition, perform inverse modeling of cylindrical fitting to obtain the centerline equation of the reference roller.

[0057] Step 8: Calculate the deviation and adjust the reference roller.

[0058] Step 9: Repeat steps 5 to 8, monitor the changes in the instrument. If the level is out of tolerance, repeat steps 2 to 8 until the relationship between the center line of the roller system and the horizontal and verticality of the production line is ≤0.02mm / m.

[0059] As an optional implementation, operation S1 is performed, specifically including: the measuring device includes a gyroscope, which measures the trajectory of the measuring device moving around the roller surface of the reference roller, and obtains the rotation center line of the reference roller based on the axis of the cylindrical surface where the trajectory lies. The angle between the horizontal plane pointed to by the gyroscope and the rotation center line of the reference roller is obtained as a first angle, and the angle between the true north direction line pointed to by the gyroscope and the rotation center line of the reference roller is obtained as a third angle. The gyroscope achieves zero-position calibration by sampling the reference roller. Under the condition of production line shutdown, the in-service roller system on the line is detected to measure the deviation between the measured roller and the reference roller, that is, the deviation between the production line running direction and the ground level.

[0060] Taking a strip rolling mill production line as an example, following step 9 above, the subsequent operations include the following steps:

[0061] Step 10: 1 hour before the production line stops running and measurement conditions are met, initialize the gyroscope.

[0062] Step 11: Sample the reference roller until the sampling quality meets the requirements.

[0063] Specifically, the measuring device contains three gyroscopes, with their rotation axes perpendicular to each other. The measuring device can consist of optical gyroscopes, accelerometers, a power module, an information processing computer, software, and algorithms. Using these three built-in, mutually perpendicular, high-precision gyroscopes, a simple scan of the measured roller system can quickly reconstruct the horizontal angle between the roller system and the ground, as well as the angle to true north. The three miniature gyroscopes are positioned at 90 degrees to each other. When the measuring device's orientation changes, the three gyroscopes calculate the trajectory of the device's movement around the work roller's surface and the axis of the cylindrical surface containing that trajectory, based on their rotational speed and angle around their respective axes, thus obtaining the work roller's rotation centerline.

[0064] As an optional implementation, operation S2 is performed, specifically including: the gyroscope measuring the trajectory of the measuring device moving around the roller surface of the work roller; obtaining the rotation center line of the work roller based on the axis of the cylindrical surface where the trajectory is located; obtaining the second included angle between the horizontal plane pointed to by the gyroscope and the rotation center line of the work roller; and obtaining the fourth included angle between the true north direction line pointed to by the gyroscope and the rotation center line of the work roller.

[0065] Correspondingly, the horizontal standard of the work roll is: the rotation center line of the work roll is parallel to the XOY plane of the preset coordinate system; the vertical standard of the work roll is: the rotation center line of the work roll is perpendicular to the X-axis of the preset coordinate system. Execute operation S3, and based on the difference between the first and second included angles, and the difference between the third and fourth included angles, obtain the deviation of the rotation center line of the work roll relative to the rotation center line of the reference roll. Adjust the work roll according to the deviation until the work roll meets the horizontal and vertical standards.

[0066] Specifically, the work roll is adjusted according to the difference between the first and second included angles to ensure that the rotation center line of the work roll meets the horizontality standard of being parallel to the XOY plane; the work roll is adjusted according to the difference between the third and fourth included angles to ensure that the rotation center line of the work roll meets the perpendicularity standard of being perpendicular to the X-axis. In the horizontality standard of the work roll, the parallelism tolerance does not exceed 0.05; in the perpendicularity standard of the work roll, the perpendicularity tolerance does not exceed 0.05.

[0067] Taking a strip rolling mill production line as an example, following step 11 above, the subsequent operations include the following steps:

[0068] Step 12: In the vertical state, the reference roller is zeroed, and the work rollers on the roller system are sampled.

[0069] Step 13: Calculate the deviation and adjust the work roller.

[0070] Step 14: Retest the gyroscope. Repeat steps 11 to 13 until the horizontal and vertical alignment of the working rollers meets the accuracy requirements.

[0071] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0072] The roller system accuracy determination method provided in this invention establishes a reference roller, positions it according to the reference coordinate axis of the roller system production line, and adjusts its position on the reference coordinate axis according to the horizontal and verticality standards. Zero-position calibration is achieved using the deflection angles of the reference roller's rotation center line, the horizontal plane, and the true north direction as references. The deflection information of the working rollers is obtained by measuring these angles, facilitating the adjustment of the working rollers to meet the horizontal and verticality requirements according to the reference roller's standards. The method is easy to operate. Under production line shutdown conditions, the method inspects the in-service roller system (i.e., working rollers) on the line, measuring the deviation between the tested roller (i.e., working roller) and the reference roller, as well as the deviation of the production line's running direction from the horizontal. This invention provides a fast and efficient measurement of the horizontality and verticality of roller system equipment in metallurgical production lines. The average measurement time for a single roller is less than 10 seconds, significantly reducing measurement time compared to existing technologies that use optical instruments to measure roller systems, thereby improving production efficiency.

[0073] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0074] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof in the foregoing description of exemplary embodiments of the invention. However, this disclosure should not be construed as reflecting an intention that the claimed disclosure requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the disclosed aspects consist of fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this disclosure.

[0075] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in a claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A method for determining the accuracy of a roller system, characterized in that, include: The measuring device reciprocates around the roller surface of the reference roller in the circumferential direction to measure the rotation center line of the reference roller, wherein the horizontality and verticality of the reference roller meet the set horizontality standard and verticality standard. The measuring device reciprocates circumferentially around the surface of the working roll on the roller production line to measure the rotation center line of the working roll. Based on the difference between the first angle between the rotation center line of the reference roller and the horizontal plane and the second angle between the rotation center line of the working roller and the horizontal plane, and the difference between the third angle between the rotation center line of the reference roller and the true north direction line and the fourth angle between the rotation center line of the working roller and the true north direction line, the horizontality and verticality of the working roller are adjusted to meet the horizontality and verticality standards. Specifically, based on the difference between the first and second angles and the difference between the third and fourth angles, the deviation of the rotation center line of the working roller relative to the rotation center line of the reference roller is obtained. The working roller is adjusted based on this deviation until it meets the horizontality and verticality standards.

2. The method for determining the accuracy of a roller system as described in claim 1, characterized in that, The measuring device includes a gyroscope, which measures the trajectory of the measuring device moving around the roller surface of the reference roller, and obtains the rotation center line of the reference roller based on the axis of the cylindrical surface where the trajectory is located.

3. The method for determining the accuracy of a roller system as described in claim 2, characterized in that, The first included angle is the angle between the rotation center line of the reference roller and the horizontal plane pointed to by the gyroscope; the third included angle is the angle between the rotation center line of the reference roller and the true north direction line pointed to by the gyroscope.

4. The method for determining the accuracy of a roller system as described in claim 2, characterized in that, The gyroscope measures the trajectory of the measuring device moving around the surface of the working roller, and the rotation center line of the working roller is obtained based on the axis of the cylindrical surface where the trajectory is located.

5. The method for determining the accuracy of a roller system as described in claim 4, characterized in that, The second included angle is the angle between the rotation center line of the working roller and the horizontal plane pointed to by the gyroscope; the fourth included angle is the angle between the rotation center line of the working roller and the true north direction line pointed to by the gyroscope.

6. The method for determining the accuracy of a roller system as described in claim 1, characterized in that, The horizontal standard of the reference roller is: the rotation center line of the reference roller is parallel to the XOY plane of the preset coordinate system; the vertical standard of the reference roller is: the rotation center line of the reference roller is perpendicular to the X-axis of the preset coordinate system; wherein, the X-axis of the preset coordinate system is parallel to the line connecting the inlet reference point and the outlet reference point of the roller system production line, and the XOY plane of the preset coordinate system is a horizontal plane.

7. The method for determining the accuracy of a roller system as described in claim 6, characterized in that, The standard for the horizontality of the work roller is that the rotation center line of the work roller is parallel to the XOY plane of the preset coordinate system; the standard for the verticality of the work roller is that the rotation center line of the work roller is perpendicular to the X-axis of the preset coordinate system.

8. The method for determining the accuracy of a roller system as described in claim 6, characterized in that, The laser tracker monitors the deviation of the rotation center line of the reference roller from the XOY plane and the X-axis, and adjusts the reference roller according to the deviation to ensure that the horizontality and verticality of the reference roller meet the horizontality standard and the verticality standard.

9. The method for determining the accuracy of a roller system as described in claim 1, characterized in that, In the horizontal and verticality standards of the reference roller, the parallelism tolerance does not exceed 0.002 and the verticality tolerance does not exceed 0.

002. In the horizontal and verticality standards of the work roll, the parallelism tolerance does not exceed 0.05 and the verticality tolerance does not exceed 0.05.

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