Calibration device for precision adjustment of rolling mills

Abstract

This utility model relates to a calibration device for precision adjustment of rolling mills, belonging to the field of rolling mill calibration technology. It includes a magnifying observation instrument mounted on a fixed stand, an observation-side fixed lens, an equipment-position lens, a light source-side fixed lens, and a laser generator. The fixed stand houses the roll box to be calibrated. The equipment-position lens is mounted on the roll shaft of the roll box via a ring-shaped assembly. Crosshairs are respectively provided on the observation-side fixed lens, the equipment-position lens, and the light source-side fixed lens. The laser generated by the laser generator passes sequentially through the light source-side fixed lens, the equipment-position lens, and the observation-side fixed lens. The magnifying observation instrument observes the overlap of the crosshairs on the three sets of lenses; if the crosshairs overlap, the calibration is complete. This utility model avoids errors from manual readings, simplifies the operation process, improves the alignment accuracy of the rolls, ensures the consistency of the roll shaft gear meshing backlash after changing the roll box, and improves the operational stability of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of rolling mill calibration technology, and relates to a calibration device for precision adjustment of rolling mills. Background Technology

[0002] With the continuous innovation and advancement of metallurgical equipment technology, high-speed wire rod production processes place more stringent demands on the performance of high-speed wire rod mills, especially in the two core indicators of rolling speed and precision. Increasing rolling speed directly affects production efficiency and capacity, while enhancing rolling precision is crucial for ensuring product quality and reducing scrap rates. Against this backdrop, improving the alignment accuracy of the rolls in high-speed wire rod mills is particularly important. It not only determines whether the equipment can operate stably at high speeds but also directly impacts the overall service life of the mill and the dimensional accuracy and surface quality of the final product.

[0003] However, within the existing technological system, the alignment adjustment of the roll box in high-speed wire rod mills still faces numerous challenges. Traditionally, this adjustment process heavily relies on the professional skills and experience of maintenance personnel, who must use various mechanical measuring tools for meticulous measurement and calibration. The problem lies in the fact that mechanical measuring tools themselves have inherent manufacturing errors, coupled with differences in interchangeability between different tools; these factors collectively constitute sources of tool error. Simultaneously, manual measurement inevitably introduces reading errors, especially in high-precision applications, where even minute reading deviations can lead to significant deviations in roll alignment.

[0004] What's more complicated is that traditional calibration methods often cannot directly measure the actual alignment of the rolls. Instead, they require measuring other parameters related to roll alignment, such as roll spacing and bearing housing position, and then indirectly inferring the roll alignment through a series of complex calculations and conversions. This process is not only tedious and time-consuming, but also, because it involves multiple intermediate steps, any tiny error at any point can be amplified, ultimately affecting the accuracy of the calibration.

[0005] In view of this, in order to overcome the above-mentioned defects of traditional calibration methods, it is urgent to propose a calibration device specifically for the precision adjustment of rolling mills, simplify the adjustment operation process of the rolling center of the roll box, and significantly improve the detection accuracy of the rolling center of the roll, so as to provide a strong guarantee for the efficient and stable operation of high-speed wire rod mills. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a calibration device for precision adjustment of rolling mill, which avoids errors from manual reading, simplifies the operation process, improves the alignment accuracy of the rolling mill rolls, ensures the consistency of the meshing backlash of the rolling mill roll shaft gears after the roll box is replaced, and improves the operational stability of the equipment.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A calibration device for precision adjustment of a rolling mill includes a magnifying observation instrument, an observation-side fixed lens, an equipment position lens, a light source-side fixed lens, and a laser generator, which are sequentially arranged on a fixed stand. The fixed stand is provided with a roll box to be calibrated, and the equipment position lens is arranged on the roll shaft of the roll box.

[0009] The observation-side fixed lens, the equipment position lens, and the light source side fixed lens are each equipped with a crosshair for calibration. The laser generated by the laser generator passes through the light source side fixed lens, the equipment position lens, and the observation-side fixed lens in sequence. The overlap of the crosshairs on the three sets of lenses is observed by the magnifying observation instrument. When the crosshairs are completely overlapped, it is determined that the equipment has completed calibration.

[0010] Optionally, an annular sleeve is fitted on the roller shaft, and a side plate is provided on the outer side of the annular sleeve. A mounting hole is opened on the side plate, and the device lens is installed in the mounting hole.

[0011] Optionally, two rollers are arranged in sequence, with the side plates on the two annular components attached to each other.

[0012] Optionally, the side plate includes a first side plate and a second side plate, the first side plate and the second side plate are respectively disposed on the outer sides of the annular assembly, and the first side plate and the second side plate on adjacent annular assemblies are fitted together;

[0013] The device positioning lens is mounted on the first side plate, and a recessed hole is formed on the second side plate to facilitate laser alignment and calibration with the crosshair of the device positioning lens on the adjacent roller.

[0014] Optionally, the first side plate and the second side plate on the same annular kit are arranged in a staggered manner, and one outer surface of the first side plate and the second side plate coincides with the radial axis of symmetry of the annular kit.

[0015] Optionally, when the crosshairs on the observation-side fixed lens, the device-position lens, and the light source-side fixed lens are completely aligned, the line connecting the crosshairs is collinear with the ray generated by the laser generator, and the two rollers and the annular assembly are symmetrical with respect to the line connecting the crosshairs.

[0016] Optionally, the fixed lens on the observation side and the fixed lens on the light source side are plane mirrors.

[0017] Optionally, the device lens is a convex lens.

[0018] Optionally, the fixed frame and the roll box are connected and fixed by matching positioning pins and positioning holes.

[0019] Optionally, the crosshair on the fixed lens on the observation side is engraved with scale lines to facilitate data recording after final calibration.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model relates to a calibration device for precision adjustment of rolling mills. This device is used in the development and design of high-speed wire rod modular rolling mills. It can be used to adjust the alignment of the roll shafts in the roll box, replacing the traditional method of using mechanical measuring tools to calibrate and align the roll shafts in the roll box. This avoids errors from manual readings, simplifies the operation process, improves the alignment accuracy of the rolls, and ensures the consistency of the gear meshing backlash of the roll shafts after the roll box is replaced, thereby improving the stability of equipment operation.

[0022] This utility model discloses a calibration device for precision adjustment of rolling mills. It calibrates the symmetry and height equality of the two rolling mill roll axes. The calibration method is simple, reducing the cumbersome steps previously required by using multiple mechanical measuring tools. It effectively reduces assembly and adjustment errors caused by varying personnel maintenance levels, improves the operational stability of the rolling mill, and reduces the problem of roll misalignment due to low calibration accuracy, which in turn leads to low dimensional accuracy of rolled products. Even without the equipment positioning lens installed, this calibration device uses a magnifying observation instrument to check the alignment of the crosshairs on the observation-side fixed lens and the light source-side fixed lens with the laser point to determine if the calibration device is inaccurate. If misalignment is found, the fixed lens can be adjusted promptly for centering correction, demonstrating that the calibration device has a self-calibration function, ensuring its long-term reliable accuracy.

[0023] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0025] Figure 1 Layout diagram of the calibration equipment;

[0026] Figure 2 for Figure 1 Top view;

[0027] Figure 3 This is a top view of the ring-shaped kit;

[0028] Figure 4 This is a cross-sectional view of the annular assembly;

[0029] Figure 5 This is a schematic diagram showing the calibration of the left roll shaft position.

[0030] Figure 6 This is a schematic diagram showing the calibration of the right-side roll shaft position.

[0031] Figure label:

[0032] 1. Magnifying observation instrument; 2. Observation side fixed lens; 3. Equipment position lens; 4. Light source side fixed lens; 5. Laser generator; 6. Fixed stand; 7. Roll box; 8. Roll shaft; 9. Annular kit; 10. Side plate; 11. First side plate; 12. Second side plate. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0035] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] Example 1

[0037] Please see Figures 1-6This is a calibration device for precision adjustment of a rolling mill, comprising a magnifying observation instrument 1, an observation-side fixed lens 2, an equipment position lens 3, a light source-side fixed lens 4, and a laser generator 5, sequentially arranged on a fixed frame 6. A roll box 7 to be calibrated is mounted on the fixed frame 6, and the equipment position lens 3 is mounted on the roll shaft 8 of the roll box 7. Crosshairs for calibration are respectively provided on the observation-side fixed lens 2, the equipment position lens 3, and the light source-side fixed lens 4. The laser generated by the laser generator 5 passes sequentially through the light source-side fixed lens 4, the equipment position lens 3, and the observation-side fixed lens 2. The magnifying observation instrument 1 observes the centering of the crosshairs on the equipment position lens 3. By adjusting the equal height of the roll shaft 8 of the roll box 7 and the symmetry of the eccentric sleeve, the crosshairs on the equipment position lens 3 are made to coincide with the crosshairs on the front and rear fixed lenses. This indicates that the calibration is complete, thus ensuring that the rolling center of the roll box is in the theoretical position.

[0038] Example 2

[0039] Based on Embodiment 1, in this embodiment, an annular sleeve 9 is fitted on the roller 8, and a side plate 10 is provided on the outside of the annular sleeve 9. The side plate 10 has a mounting hole, and the device position lens 3 is installed in the mounting hole.

[0040] Two rollers 8 are arranged in sequence, and the side plates 10 on the two annular kits 9 are attached to each other.

[0041] When the crosshairs on the observation side fixed lens 2, the equipment position lens 3, and the light source side fixed lens 4 are completely aligned, the line connecting the crosshairs is collinear with the ray generated by the laser generator 5, and the two rollers 8 and the annular kit 9 ​​are symmetrical with respect to the line connecting the crosshairs.

[0042] Example 3

[0043] Based on Embodiment 2, this embodiment defines the side plate 10 as including a first side plate 11 and a second side plate 12. The first side plate 11 and the second side plate 12 are respectively disposed on the outer sides of the annular assembly 9, and the first side plate 11 and the second side plate 12 on adjacent annular assemblies 9 are fitted together. The equipment position lens 3 is installed on the first side plate 11, and the second side plate 12 has a concave hole to facilitate the laser to be aligned with the crosshair of the equipment position lens 3 on the adjacent roller 8 for calibration. The first side plate 11 and the second side plate 12 on the same annular assembly 9 are arranged in a staggered manner, and one outer surface of the first side plate 11 and the second side plate 12 coincides with the radial symmetry axis of the annular assembly 9.

[0044] In some embodiments of this invention, the fixed platform 6 and the roll box 7 are connected and fixed by matching positioning pins and positioning holes. The crosshair on the observation-side fixed lens 2 is engraved with scale lines to facilitate data recording after final calibration.

[0045] The calibration equipment of this invention, when used to calibrate a rolling mill, hoists the roll box 7 to be calibrated onto a fixed platform 6. The fixed platform 6 is equipped with matching positioning pins and positioning holes for mechanical positioning of the roll box 7, ensuring symmetry of the roll box 7 with respect to the light emitted by the laser emitter when placed on the fixed platform 6. A fixed lens 4 on the light source side and a fixed lens 2 on the observation side are fixedly installed along the light path generated by the laser emitter, with the two lenses distributed at both ends of the roll box 7. The equipment position lens 3 is installed in the same manner as the working roll ring of the roll box 7. Figure 3 , Figure 4 The annular assembly 9 shown places the device lens 3 at the geometric center of the side plate 10 of the annular assembly 9. The centers of the lenses used in the aforementioned three locations are designed with precisely engraved crosshair centering marks. In some embodiments of this utility model, the observation-side fixed lens 2 and the light source-side fixed lens 4 are plane mirrors, and the device lens 3 is a convex lens, so that the light passing through does not pass perpendicularly through the center and then produces a large angle before reaching the observation-side fixed lens 2. The crosshair on the observation-side fixed lens 2 is engraved with scale lines to facilitate the recording of data after final calibration.

[0046] When the equipment lens 3 is not installed, the light generated by the laser generator 5 passes sequentially through the fixed lens 4 on the light source side and the fixed lens 2 on the observation side before entering the magnifying observation instrument 1. At this time, the alignment of the crosshair in the fixed lens with the laser point is observed through the magnifying observation instrument 1. This allows for calibration of the equipment's centering accuracy, determining if the calibration is inaccurate. If misalignment occurs, the fixed lens can be adjusted for timely centering correction. During observation, the operator can rotate the base of the magnifying observation instrument 1 vertically, horizontally, and horizontally, as well as adjust the focus, as needed. This ensures that the observer can clearly and accurately observe the alignment of the crosshair on the lens with the laser point, reducing errors caused by the observer's viewing habits.

[0047] After completing the alignment accuracy correction of the above calibration equipment, install the equipment positioning lens 3 on the roll box 7 that requires alignment adjustment. The top view of the assembled equipment is shown in the figure. Figure 2 As shown. The centering of the two roll shafts 8 of the roll box 7 is adjusted sequentially. First, the center distance between the rolls of the roll box 7 is adjusted. The two roll shafts 8 are rotated so that the equipment lens 3 on the left roll shaft 8 is positioned on the path of the light rays, and the lensless side plate 10 on the right roll shaft 8 is in contact with the side plate 10 on the left roll shaft 8 where the equipment lens 3 is mounted. Figure 5As shown, the laser point on the fixed lens 2 on the observation side is checked using the magnifying observation instrument 1 to see if it coincides with the crosshair. If the laser point coincides with the vertical line of the crosshair scale, the two roller shafts 8 are symmetrical in the horizontal direction. If the laser point coincides with the horizontal line of the crosshair scale, the axial position of the left roller shaft 8 is accurate. If the laser point coincides with the center of the crosshair, it indicates that the left roller shaft 8 has been calibrated. After the left roller shaft 8 is calibrated, the two roller shafts 8 are rotated in this way so that the equipment lens 3 on the right roller shaft 8 is positioned on the path through which the light passes. The lensless side plate 10 on the left roller shaft 8 is in contact with the side plate 10 on the right roller shaft 8 where the equipment lens 3 is installed. Figure 6 As shown, the laser point on the fixed lens 2 on the observation side is checked by the magnifying observation instrument 1 to see if it coincides with the crosshair cursor. Based on the above, it is determined whether the right roll shaft 8 is calibrated. Finally, the left roll shaft 8 is rotated to bring the side plates 10 of the equipment position lens 3 on the two roll shafts 8 into place, so that they are on the path of the light. The alignment of the laser point and the crosshair cursor is checked by the magnifying observation instrument 1 and recorded. This is used to verify the calibration accuracy of the working position of the roll shaft 8.

[0048] The installation method of the equipment position lens 3 is the same as that of the roll ring on the roll box 7. After installation, the center of the crosshair of the equipment position lens 3 is the rolling center of the roll box 7 in the working state. By adjusting the height of the roll shaft 8 and the symmetry of the two ring-shaped components 9, the center of the crosshair of the equipment position lens 3 is made to be collinear with the laser, so as to achieve high-precision calibration of the centering of the roll box 7 in the working state.

[0049] The base of the magnifying observation instrument 1 has the ability to be adjusted up and down, left and right, and rotate horizontally. The observation instrument also has a focus adjustment function so that the user can clearly and accurately observe the overlap between the crosshair of the lens and the laser point, reducing errors caused by human operation.

[0050] The substrate structure of the lens 3 in the device position is a circular ring-shaped assembly 9 that simulates a roller ring mounting (e.g., Figure 3 , Figure 4 A lens is installed at one end along the diameter direction and removed at the other end so that the alignment of a single roll shaft 8 can be calibrated separately, and then the alignment of the two roll shafts 8 can be checked again.

[0051] This invention utilizes the basic principle of laser propagation along a straight line to calibrate the rolling center of the roll box 7 to its theoretical position by using a three-point collinearity method, thereby improving the assembly accuracy of the roll box 7 equipment and the dimensional accuracy of the rolled products.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A calibration device for precision adjustment of a rolling mill, characterized in that: The device includes a magnifying observation instrument (1), an observation side fixed lens (2), an equipment position lens (3), a light source side fixed lens (4), and a laser generator (5) arranged sequentially on a fixed stand (6). The fixed stand (6) is equipped with a roll box (7) that needs to be calibrated, and the equipment position lens (3) is arranged on the roller shaft (8) of the roll box (7). The observation-side fixed lens (2), the equipment position lens (3), and the light source side fixed lens (4) are respectively equipped with crosshairs for calibration. The laser generated by the laser generator (5) passes through the light source side fixed lens (4), the equipment position lens (3), and the observation-side fixed lens (2) in sequence. The overlap of the crosshairs on the three sets of lenses is observed by the magnifying observation instrument (1). When the crosshairs are completely overlapped, it is determined that the equipment has completed calibration.

2. The calibration equipment for precision adjustment of a rolling mill according to claim 1, characterized in that: The roller (8) is fitted with an annular sleeve (9), and the annular sleeve (9) has a side plate (10) on its outer side. The side plate (10) has a mounting hole, and the device lens (3) is installed in the mounting hole.

3. The calibration equipment for precision adjustment of a rolling mill according to claim 2, characterized in that: Two rollers (8) are arranged in sequence, and the side plates (10) on the two annular kits (9) are fitted together.

4. The calibration equipment for precision adjustment of a rolling mill according to claim 3, characterized in that: The side plate (10) includes a first side plate (11) and a second side plate (12). The first side plate (11) and the second side plate (12) are respectively disposed on the outer sides of the annular kit (9). The first side plate (11) and the second side plate (12) on adjacent annular kits (9) are fitted together. The device position lens (3) is installed on the first side plate (11), and a recessed hole is opened on the second side plate (12) to facilitate the laser to be aligned and calibrated with the crosshair of the device position lens (3) on the adjacent roller (8).

5. The calibration equipment for precision adjustment of a rolling mill according to claim 4, characterized in that: The first side plate (11) and the second side plate (12) on the same annular kit (9) are staggered, and the outer surface of one side of the first side plate (11) and the second side plate (12) coincides with the radial axis of symmetry of the annular kit (9).

6. The calibration equipment for precision adjustment of a rolling mill according to claim 2, characterized in that: When the crosshairs on the observation side fixed lens (2), the equipment position lens (3), and the light source side fixed lens (4) are completely aligned, the line connecting the crosshairs is collinear with the ray generated by the laser generator (5), and the two rollers (8) and the annular kit (9) are symmetrical with respect to the line connecting the crosshairs.

7. The calibration equipment for precision adjustment of a rolling mill according to claim 1, characterized in that: The observation-side fixed lens (2) and the light source-side fixed lens (4) are plane mirrors.

8. The calibration equipment for precision adjustment of a rolling mill according to claim 1, characterized in that: The device lens (3) is a convex lens.

9. The calibration equipment for precision adjustment of a rolling mill according to claim 1, characterized in that: The fixed frame (6) and the roll box (7) are connected and fixed by matching positioning pins and positioning holes.

10. The calibration equipment for precision adjustment of a rolling mill according to claim 1, characterized in that: The crosshair on the fixed lens (2) on the observation side is engraved with scale lines, which facilitates the recording of data after final calibration.

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