Measuring device for leveling the flatness of a roll and roll leveling method

Abstract

The present invention relates to a measuring device for leveling the flatness of rolls and a roll leveling method. The measuring device for leveling the flatness of rolls includes a guide rail mechanism and a measuring mechanism. The guide rail mechanism includes two sets of slide rail assemblies, which are respectively located on the opposite sides of the roll group to be measured. The measuring mechanism includes two sets of measuring assemblies, and both sets of the measuring assemblies are slidably arranged on the slide rail assemblies and can slide along the length direction of the rolls. The measuring assemblies straddle the upper side of the roll group to measure each roll in the roll group. By using this measuring device, the measurement of multiple rolls arranged side by side can be completed at one time through the measuring assemblies, and the measurement efficiency is high. A calibration plane is formed by using a standard rope, and the rolls are adjusted according to the positional relationship between the rolls and the calibration plane, with high accuracy and good roll leveling effect.

Description

Technical Field

[0001] The present invention relates to the technical field of steel production equipment, and particularly to a measuring device for leveling the flatness of rolls and a roll leveling method. Background Art

[0002] As Figure 1 shown, when the rolls in a steel mill are working, the sheet passes through the rolling space between the rolls and is rolled into the required steel billets. The flatness of the rolls directly affects the quality of the steel billets. If the thickness of the steel billets exceeds the range during use, maintenance and adjustment are required.

[0003] During maintenance, generally, measurement is carried out through a crossbar and a feeler gauge. Among them, both ends of the crossbar are slidably arranged on a strictly calibrated smooth track. The distance between the roll and the crossbar is measured by the feeler gauge, and then the height of the bearing seats at both ends of one section of the roll is adjusted according to the value of the feeler gauge, and finally the entire roll surface reaches a certain flatness. However, due to the large self-weight of the crossbar, its deflection value changes greatly; at the same time, affected by the accuracy of the feeler gauge, there are large errors in the adjustment values of the bearing seats, and workers need to measure and adjust repeatedly. In addition, usually a set of roll groups includes multiple sections of rolls. When leveling, multiple points need to be measured, and the manual measurement workload is large; for the maintenance of a steel mill, the time is tight and the task is heavy. There is an urgent need for a measuring device that can automatically measure and provide the adjustment data at both ends of each section of the roll. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a measuring device for leveling the flatness of rolls and a roll leveling method, which can improve the measurement workload during roll leveling and improve the leveling efficiency.

[0005] To solve the above technical problem, the technical solution of the present invention is: A measuring device for leveling the flatness of rolls, comprising

[0006] a guide rail mechanism, the guide rail mechanism includes two sets of slide rail assemblies, and the two sets of slide rail assemblies are respectively located on the opposite sides of the roll group to be measured;

[0007] and a measuring mechanism, the measuring mechanism includes two sets of measuring components, and both sets of the measuring components are slidably arranged on the slide rail assemblies and can slide along the length direction of the roll; the measuring components straddle the upper side of the roll group to measure each roll in the roll group.

[0008] As a preferred technical solution, the slide rail assembly includes a slide rail base, and a slide rail is fixed on the slide rail base. The slide rail is horizontally arranged and the extending direction of the slide rail is parallel to the axial direction of the roll.

[0009] As a preferred technical solution, a position sensor or a position switch is arranged on the slide rail base for detecting whether the measuring component reaches the set position.

[0010] As a preferred technical solution, the measuring assembly includes

[0011] Two vertical brackets, which are respectively slidably arranged on two sets of slide rail assemblies;

[0012] At least one connecting rod, through which the two vertical brackets are connected into one body;

[0013] A lead screw, the two ends of which are respectively rotatably installed on the two vertical brackets;

[0014] A standard rope, the two ends of which are respectively fixed on the two vertical brackets;

[0015] And a test bracket, which is threadedly connected to the lead screw; an upper measuring probe and a lower measuring probe are fixedly arranged on the test bracket;

[0016] The two standard ropes located in the two measuring assemblies are in the same horizontal plane; when the lead screw rotates, the test bracket moves along the lead screw, the connecting rod guides the test bracket, the upper measuring probe measures the vertical distance between it and the standard rope, and the lower measuring probe measures the vertical distance between it and the rolling mill roll.

[0017] As a preferred technical solution, the lower end of the vertical bracket is provided with a C-shaped sliding seat for slidably connecting with the slide rail assembly.

[0018] As a preferred technical solution, the test bracket is provided with a guiding hole matching the connecting rod, and the test bracket is slidably sleeved on the outside of the connecting rod through the guiding hole.

[0019] The roll leveling method realized by applying the above-mentioned measuring device for roll flatness leveling includes

[0020] Setting a calibration plane on the upper side of the to-be-tested roll group, and the calibration plane is a horizontal plane;

[0021] Selecting and setting two measuring positions on each roll, and measuring the distances of the two measuring positions relative to the calibration plane;

[0022] According to the measurement data of all the rolls in the to-be-tested roll group, calculating to obtain the average vertical distance H of the rolls in the to-be-tested roll group relative to the calibration plane;

[0023] Then respectively judging the relationship between the distances of both ends of each roll relative to the calibration plane and the average vertical distance H and making adjustments.

[0024] As a preferred technical solution, the two measuring positions of multiple rolls arranged side by side are respectively on two parallel straight lines, and the measuring assembly moves horizontally once to complete the measurement of multiple rolls;

[0025] The distances of the two ends of each roll relative to the calibration plane are calculated based on the vertical distances of the two measurement positions relative to the calibration plane, the distance between the two measurement positions, and the distance of the measurement position relative to the roll end.

[0026] As a preferred technical solution,

[0027] If the vertical distance of the roll end relative to the calibration plane is greater than the average vertical distance H, the thickness of the corresponding end shim is increased, and the increased thickness of the shim is the difference between the vertical distance value of this end and the average vertical distance H;

[0028] If the vertical distance of the roll end relative to the calibration plane is less than H, the thickness of the corresponding end shim is decreased, and the decreased thickness of the shim is the difference between the average vertical distance H and the vertical distance of this end.

[0029] As a preferred technical solution,

[0030] When it is detected that the lower measurement probe approaches the roll, it is judged whether the detection value of the lower measurement probe is lower than the set value. If so, the lead screw is controlled to run at the set low speed and the sampling frequency of the lower measurement probe is increased;

[0031] When it is detected that the lower measurement probe moves away from the roll, it is judged whether the detection value of the lower measurement probe is higher than the set value. If so, the lead screw is controlled to run at the set high speed and the sampling frequency of the lower measurement probe is decreased.

[0032] Due to the adoption of the above technical solutions, the measuring device and the roll leveling method for roll flatness leveling can complete the measurement of multiple side-by-side rolls at one time through the measurement component, with high measurement efficiency; a calibration plane is formed by using a standard rope, and the roll is adjusted according to the positional relationship between the roll and the calibration plane, with high accuracy and good roll leveling effect. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 is a schematic structural diagram of the roll working;

[0035] Figure 2 is a schematic structural diagram of the measuring device;

[0036] Figure 3 is a schematic diagram of the measuring device measuring;

[0037] Figure 4It is the measurement principle diagram of the measuring device. DETAILED DESCRIPTION

[0038] Measuring device for roller flatness leveling, such as Figure 2 As shown, it includes a guide rail mechanism and a measuring mechanism, wherein the guide rail mechanism includes two sets of slide rail assemblies 1, and the measuring mechanism includes two sets of measuring assemblies 3. When in use, the two sets of slide rail assemblies 1 are respectively located on opposite sides of the roll group, and the two sets of measuring assemblies 3 are slidably arranged on the slide rail assemblies 1. The measuring assembly 3 is arranged across the upper side of the roll group, and each roll 2 in the roll group can be measured.

[0039] Each set of slide rail assemblies 1 includes a slide rail base 11, on which a slide rail 12 is fixed. The slide rail 12 is horizontally arranged and strictly leveled, and its lower part is fixedly connected to the slide rail base 11; the extension direction of the slide rail 12 is parallel to the axial direction of the roller 2.

[0040] Each set of measuring components 3 includes two vertical brackets 31; the two vertical brackets 31 are slidably arranged on two slide rails 12, that is, one slide rail 12 corresponds to one vertical bracket 31, and the two vertical brackets 31 are arranged in parallel and at intervals on opposite sides of the roll group. A C-shaped sliding seat is provided at the lower end of the vertical bracket 31 for sliding connection with the slide rail 12, so that the vertical bracket 31 can be easily installed on or removed from the slide rail 12. At least one connecting rod 33 is also provided between the two vertical brackets 31, and the two vertical brackets 31 are connected as a whole through the connecting rod 33.

[0041] A screw rod 34 is arranged between the two vertical brackets 31, and the screw rod 34 is arranged across the upper side of the rolling roller group; the two ends of the screw rod 34 are rotatably mounted on the two vertical brackets 31 respectively. One end of the screw rod 34 is transmission-connected to a driving device such as a servo motor, and rotates under the drive of the driving device. A test bracket 35 is threadedly connected to the screw rod 34, and the test bracket 35 is provided with a threaded hole matching the screw rod 34, and is threadedly connected to the screw rod 34 through the threaded hole. The screw rod 34 rotates, driving the test bracket 35 to move along the screw rod 34. The connecting rod 33 also guides the test bracket 35 to prevent the test bracket 35 from flipping over. Specifically, the test bracket 35 is also provided with a guide hole matching the connecting rod 33, and the test bracket 35 is slidably mounted on the outer side of the connecting rod 33 through the guide hole.

[0042] The upper ends of the two vertical brackets 31 are also provided with standard ropes 32, and the two ends of the standard ropes 32 are respectively fixed to the upper ends of the two vertical brackets 31. The standard ropes 32 are preferably steel wires, and a thin steel wire with a diameter of 0.4 mm is used. A certain tension is applied to both ends of the steel wire, for example, two-thirds of the breaking tension of the steel wire is applied.

[0043] Since the standard rope 32 has a certain tensile force, an inward pulling force is applied to the upper ends of the two vertical brackets 31. To ensure the verticality of the vertical brackets 31, two connecting rods 33 are arranged between the two vertical brackets 31, which can further improve the stability of the measuring assembly 3, prevent the inward contraction of the vertical brackets 31 from affecting the test accuracy, and ensure the accuracy of the test results.

[0044] The upper end of the test bracket 35 is fixedly provided with an upper measuring probe 36, and the lower end of the test bracket 35 is fixedly provided with a lower measuring probe 37. Among them, the upper measuring probe 36 is used to detect the distance between it and the standard rope 32, that is, to measure the vertical distance between it and the plane determined by the two standard ropes 32; the lower measuring probe 37 is used to measure the distance between it and a certain point on the roller 2.

[0045] Two strictly leveled slide rails 12 are transmitted to the two standard ropes 32 through the vertical brackets 31 thereon, and the two standard ropes 32 form a calibration plane. Both groups of measuring assemblies 3 can move on the slide rails 12. The movement of the measuring assembly 3 can be manual, or it can of course be mechanically driven by a servo motor, a lead screw assembly, etc. The test bracket 35 moves under the drive of the lead screw 34 to measure different rollers 2.

[0046] Further, in order to achieve efficient and accurate measurement, a position sensor or a position switch is arranged on the slide rail base 11 to detect the position of the vertical bracket 31 on the slide rail 12; when it is detected that the vertical bracket 31 reaches the set position, the lead screw 34 is controlled to rotate for measurement.

[0047] During measurement, both groups of measuring assemblies 3 are used simultaneously to measure the vertical distances of two measurement points on each roller 2 relative to the calibration plane. Specifically, this vertical distance consists of three parts. One is the distance between the upper measuring probe 36 and the calibration plane; the second is the dimension between the upper measuring probe 36 and the lower measuring probe 37, and this dimension is a fixed value, which can be accurate to 0.1 micrometer; the third part is the distance between the lower measuring probe 37 and the measurement point on the roller 2.

[0048] The roller leveling method implemented by applying the above measurement device includes

[0049] A calibration plane is set on the upper side of the roller group to be measured, and the calibration plane is a horizontal plane;

[0050] Two measurement positions are selected and set on each roller 2, and the distances of the two measurement positions relative to the calibration plane are measured;

[0051] According to the measurement data of all the rollers 2 in the roller group to be measured, the average vertical distance H of the rollers 2 in the roller group to be measured relative to the calibration plane is calculated;

[0052] Then, the distances between the two ends of each roll 2 relative to the calibration plane are respectively judged and adjusted in relation to the average vertical distance H.

[0053] Specifically, the two standard ropes 32 located in the two sets of measuring components 3 are in the same horizontal plane, forming a calibration plane. Since the slide rail 12 is strictly leveled, the referenceability of the calibration plane is high.

[0054] Each roll group is composed of multiple multi-section rolls 2 arranged coaxially and side by side. Two measuring positions are set for the multi-section rolls 2 arranged side by side. The two sets of measuring components 3 correspond to the two measuring positions. The measuring component 3 moves once on the slide rail 12 to complete the measurement of all the rolls 2 at this measuring position. Corresponding to each roll 2, there are two measuring points on each roll 2, such as Figure 3 and Figure 4 shown, that is, the first measuring point 41 and the second measuring point 42; in order to improve the measurement efficiency, the first measuring points 41 on the multi-section rolls 2 corresponding to one of the measuring positions are on the same straight line, and the second measuring points 42 on the multi-section rolls 2 corresponding to the other measuring position are on the same straight line. In actual use, when setting the two measuring positions, the principle is that the distance between the first measuring point 41 and the second measuring point 42 is as large as possible.

[0055] The two sets of measuring components 3 respectively measure the first measuring point 41 and the second measuring point 42, and obtain the distance d1 of the first measuring point 41 relative to the calibration plane and the distance d2 of the second measuring point 42 relative to the calibration plane.

[0056] During measurement, when it is detected that the lower measuring probe 37 approaches the roll 2, it is judged whether the detection value of the lower measuring probe 37 is lower than the set value. If so, the lead screw 34 is controlled to run at a set low speed and the sampling frequency of the lower measuring probe 37 is increased; when it is detected that the lower measuring probe 37 moves away from the roll 2, it is judged whether the detection value of the lower measuring probe 37 is higher than the set value. If so, the lead screw 34 is controlled to run at a set high speed and the sampling frequency of the lower measuring probe 37 is decreased.

[0057] Specifically, when the measuring component 3 reaches the measuring position, the control lead screw 34 rotates. At startup, since the lower measuring probe 37 is far from the highest measuring position of the rolling mill 2, the lower measuring probe 37 is allowed to approach the rolling mill 2 at high speed. Therefore, the control lead screw 34 operates at a set high rotational speed, and the test bracket 35 moves at high speed. At this time, the detected value of the lower measuring probe 37 decreases from large to small, that is, the lower measuring probe 37 approaches the rolling mill 2. When the detected value is within the set value, for example, 8000 - 10000 microns, the control lead screw 34 operates at a set low rotational speed and increases the sampling frequency of the lower measuring probe 37; when the detected value of the lower measuring probe 37 increases from small to large, that is, the lower measuring probe 37 moves away from the rolling mill 2, when the detected value is greater than the set value, for example, greater than 7000 microns, the control lead screw 34 operates at a set high rotational speed and decreases the sampling frequency of the lower measuring probe 37.

[0058] After the measurement is completed, the sampling data of the lower measuring probe 37 is analyzed and screened. Each high-frequency sampling corresponds to one section of the rolling mill 2. Therefore, the minimum value in the high-frequency sampling data is selected and set as the vertical distance between the first measuring point 41 and the calibration plane or the vertical distance between the second measuring point 42 and the calibration plane .

[0059] After completing the measurement of a group of side-by-side rolling mills, the control measuring component 3 moves on the slide rail 12. After detecting the position through the micro-position switch, the measuring component 3 measures the next group of side-by-side rolling mills.

[0060] Repeat the above steps multiple times to complete the measurement of all rolling mills 2.

[0061] After completing the measurement of all rolling mills 2, based on the measurement data of all rolling mills 2 in the rolling mill group to be measured, the average vertical distance H of the rolling mills 2 in the rolling mill group to be measured relative to the calibration plane is calculated.

[0062] Since the ends of each section of the rolling mill 2 in the side-by-side rolling mill group are uneven, the first measuring point 41 and the second measuring point 42 cannot be set as the ends of the rolling mill 2. Therefore, it is necessary to calculate the distance between the ends of the rolling mill 2 and the calibration plane according to the measured values.

[0063] For example:

[0064] Measure and obtain the length of the rolling mill between the first measuring point 41 and the second measuring point 42 the length of the rolling mill between the first measuring point 41 and the end of the section of the rolling mill adjacent to it or the length of the rolling mill between the second measuring point 42 and the end of the section of the rolling mill adjacent to it and the length L of this section of the rolling mill 2; calculate the vertical distance between the two ends of each section of the rolling mill 2 and the calibration plane.

[0065] Such as Figure 3 and Figure 4As shown in the figure, taking a section of roll 2 as an example:

[0066] It is known that:

[0067] The length L1 of the roll between the first measurement point 41 and the second measurement point 42;

[0068] The distance L2 between the second measurement point 42 and the end of the roll 2;

[0069] The length L of the roll 2;

[0070] The distance d1 of the first measurement point 41 relative to the calibration plane;

[0071] The distance d2 of the second measurement point 42 relative to the calibration plane;

[0072] According to the measurement data of each section of roll 2, calculate the distances of both ends of the roll 2 relative to the calibration plane and ;

[0073] Among them, from

[0074]

[0075] we get

[0076] ;

[0077] From

[0078]

[0079] we get

[0080]

[0081] After calculating the vertical distances of both ends of the roll 2 relative to the calibration plane, judge the relationship between the vertical distance of the end of the roll 2 relative to the calibration plane and the average value H;

[0082] If the vertical distance is greater than the average vertical distance H, increase the thickness of the corresponding end gasket, and the increased thickness is the difference between the vertical distance value of this end and the average vertical distance H;

[0083] If the vertical distance is less than H, reduce the thickness of the corresponding end gasket, and the reduced thickness is the difference between the average vertical distance H and the vertical distance of this end.

[0084] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. Measuring device for leveling the flatness of a rolling roll, characterized in that: Comprising A guide rail mechanism, said guide rail mechanism comprising two sets of slide rail assemblies (1), the two sets of slide rail assemblies (1) being respectively located on opposite sides of the roll group to be measured; And a measuring mechanism, said measuring mechanism comprising two sets of measuring assemblies (3), both of the two sets of measuring assemblies (3) being slidably arranged on the slide rail assemblies (1) and capable of sliding along the length direction of the rolls (2); the measuring assemblies (3) straddle the upper side of the roll group to measure each roll (2) within the roll group; Said slide rail assembly (1) comprises a slide rail base (11), a slide rail (12) being fixed on the slide rail base (11), the slide rail (12) being horizontally arranged and the extending direction of the slide rail (12) being parallel to the axial direction of the rolls (2); Said measuring assembly (3) comprises Two vertical brackets (31), the two vertical brackets (31) being respectively slidably arranged on the two sets of slide rail assemblies (1); At least one connecting rod (33), the two vertical brackets (31) being connected into one body by means of the connecting rod (33); A lead screw (34), the two ends of the lead screw (34) being respectively rotatably installed on the two vertical brackets (31); A standard rope (32), the two ends of the standard rope (32) being respectively fixed on the two vertical brackets (31); And a test bracket (35), the test bracket (35) being in threaded connection with the lead screw (34); an upper measuring probe (36) and a lower measuring probe (37) are fixedly arranged on the test bracket (35); The two standard ropes (32) located within the two sets of measuring assemblies (3) are in the same horizontal plane; when the lead screw (34) rotates, the test bracket (35) moves along the lead screw (34), the connecting rod (33) guiding the test bracket (35), the upper measuring probe (36) measuring the vertical distance between it and the standard rope (32), and the lower measuring probe (37) measuring the vertical distance between it and the roll (2).

2. The measuring device for flattening the flatness of a roll according to claim 1, wherein: A position sensor or a position switch is provided on the slide rail base (11) for detecting whether the measuring assembly (3) reaches a set position.

3. The measuring device for leveling the flatness of the roll according to claim 1, characterized in that: The lower end of the vertical bracket (31) is provided with a C-shaped sliding seat for slidably connecting with the slide rail assembly (1).

4. The measuring device for leveling the flatness of a roll according to claim 1, characterized in that: The test bracket (35) is provided with a guiding hole matching the connecting rod (33), and the test bracket (35) is slidably sleeved on the outer side of the connecting rod (33) through the guiding hole.

5. A roll leveling method implemented by using the measuring device for roll flatness leveling according to any one of claims 1 to 4, characterized in that: Comprising A calibration plane is arranged on the upper side of the roll group to be measured, and the calibration plane is a horizontal plane; On each roll (2), two measuring positions are selected and set, and the distances of the two measuring positions relative to the calibration plane are measured; Based on the measurement data of all the rolls (2) within the roll group to be measured, the average vertical distance H of the rolls (2) within the roll group to be measured relative to the calibration plane is calculated; Then, the relationships between the distances of both ends of each roll (2) relative to the calibration plane and the average vertical distance H are respectively judged and adjusted.

6. The roll leveling method according to claim 5, characterized in that: The two measuring positions of the multiple sets of rolls (2) arranged side by side are respectively located on two parallel straight lines, and the measuring assembly (3) moves horizontally once to complete the measurement of the multiple sets of rolls (2); The distances of the two ends of each roll (2) relative to the calibration plane are calculated based on the vertical distances of the two measurement positions relative to the calibration plane, the distance between the two measurement positions, and the distance of the measurement position relative to the roll end.

7. The roll leveling method according to claim 6, wherein:[[]] If the vertical distance of the roll end relative to the calibration plane is greater than the average vertical distance H, the thickness of the corresponding end gasket is increased, and the increased thickness of the gasket is the difference between the vertical distance value of this end and the average vertical distance H; If the vertical distance of the roll end relative to the calibration plane is less than H, the thickness of the corresponding end gasket is decreased, and the decreased thickness of the gasket is the difference between the average vertical distance H and the vertical distance of this end.

8. The roll leveling method according to claim 6, wherein:[[]] When it is detected that the lower measurement probe (37) approaches the roll (2), it is judged whether the detection value of the lower measurement probe (37) is lower than the set value. If so, the lead screw (34) is controlled to run at the set low speed and the sampling frequency of the lower measurement probe (37) is increased; When it is detected that the lower measurement probe (37) moves away from the roll (2), it is judged whether the detection value of the lower measurement probe (37) is higher than the set value. If so, the lead screw (34) is controlled to run at the set high speed and the sampling frequency of the lower measurement probe (37) is decreased.

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