Precision measurement device and precision measurement method

Abstract

The invention relates to the technical field of rolling mill housing base precision measurement, in particular to a precision measuring device which is installed on a rolling mill base and comprises a connecting shaft, a connecting steel pipe, a base, a dial indicator and a micrometer measuring scale, and the connecting shaft is arranged above the rolling mill base and is parallel to the rolling mill base during measurement. And the two bases are arranged at the two ends of the rolling mill base correspondingly and rotationally connected to the connecting shaft. The dial indicator is installed on the rolling mill base, and the measuring head of the dial indicator abuts against the connecting shaft, so that the connecting shaft and the rolling mill base can be monitored and adjusted in parallel; and on the other hand, the movement of the connecting shaft during rotation can be monitored. The micrometer measuring scale is vertically connected to the connecting steel pipe and used for measuring the distance between the connecting shaft and the longitudinal center line after the connecting shaft rotates and calculating the perpendicularity of the base and the longitudinal center line, the micrometer measuring scale can read the value of the micrometer, the more accurate perpendicularity is obtained, and the measuring precision of the rolling mill base is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of rolling mill base installation technology, specifically to a precision measuring device and a precision measuring method. Background Technology

[0002] Rolling mills are core equipment in industrial processing, used for rolling, forming, and further processing of metal materials to provide key raw materials for downstream industries. The precision of the mill base directly affects the stability of the mill's operation. Insufficient base precision can lead to machine vibration, swaying, and even axial misalignment, thus affecting rolling quality, such as uneven material thickness and surface roughness. This not only causes material scrap and increases production costs but can also damage the company's market reputation and hinder long-term development.

[0003] In the prior art, measuring the perpendicularity of the base to the longitudinal center line is an effective measure for evaluating the installation accuracy of the base. However, the perpendicularity is usually measured with a tape measure and visually by the construction personnel. The measurement accuracy of this method is poor, and the installation accuracy judged based on this value is only an estimate and cannot guarantee the installation accuracy of the rolling mill base. Summary of the Invention

[0004] This invention is made to solve the above-mentioned technical problems. Its purpose is to provide a precision measuring device and a precision measuring method. It provides a device installed on the rolling mill base, which is equipped with a dial indicator and a micrometer measuring ruler. When measuring the installation accuracy of the rolling mill base, more accurate measurement values ​​can be obtained, thereby ensuring the installation accuracy of the rolling mill base.

[0005] This invention provides a precision measurement method. By adjusting the horizontality of the connecting shaft and the parallelism between it and the mill base, and by obtaining a more accurate measurement value through a micrometer measuring ruler, the verticality of the mill base is calculated, thereby further ensuring the installation accuracy of the mill base.

[0006] To achieve the above objectives, the present invention also provides a precision measuring device, installed on a rolling mill base, comprising: a connecting shaft rotatably disposed above the rolling mill base; a connecting steel pipe vertically disposed on the connecting shaft; two bases respectively disposed at both ends of the rolling mill base and rotatably connected to the connecting shaft; two dial indicators disposed on the rolling mill base, the measuring heads of the dial indicators abutting against the connecting shaft; and a micrometer measuring ruler vertically connected to the connecting steel pipe.

[0007] Preferably, it also includes set screws, of which two are provided and respectively connected to both ends of the connecting shaft.

[0008] Preferably, it further includes a fixing member connected to the set screw and restricting the axial movement of the connecting shaft.

[0009] Preferably, the center of the base and the center of the connecting shaft are located on the same axis.

[0010] Preferably, it also includes gaskets, of which a plurality are provided and detachably disposed within the base.

[0011] Preferably, the dial indicator further includes a magnetic base, which is mounted on the mill base.

[0012] Preferably, it also includes a mounting steel pipe for mounting the micrometer measuring ruler, which is perpendicular to the connecting steel pipe and parallel to the connecting shaft.

[0013] This invention provides a precision measuring device applicable to any of the precision measuring devices described above, comprising: adjusting the levelness of the rolling mill base, moving the precision measuring device onto the rolling mill base; adjusting the elevation of the connecting shaft and its parallelism with the rolling mill base, and fixing the base to the rolling mill base; rotating the connecting shaft to bring the measuring end of the micrometer measuring ruler close to the longitudinal center line, and calculating the perpendicularity of the rolling mill base to the longitudinal center line.

[0014] Preferably, adjusting the elevation of the connecting shaft and its parallelism with the mill base, and fixing the base to the mill base, includes: moving the connecting shaft to a preset height; adjusting the number of shims so that the dial indicator pointers at both ends of the connecting shaft no longer deviate; and fixing the base to the mill base.

[0015] Preferably, the step of rotating the connecting shaft to bring the measuring end of the micrometer gauge closer to the longitudinal centerline and calculating the perpendicularity of the mill base to the longitudinal centerline includes: rotating the connecting shaft to bring the measuring end of the micrometer gauge to a first preset point, and the distance from the micrometer gauge reading acquisition point. Continue rotating the connecting shaft until the measuring end of the micrometer reaches the second preset point, at which point the micrometer reading is obtained. According to the formula: The perpendicularity of the rolling mill base to the longitudinal centerline is calculated, wherein the first preset point and the second preset point are points close to the longitudinal centerline. D The distance between the first preset point and the second preset point.

[0016] Based on the above description and practice, the precision measuring device of this invention, installed on the mill base, includes a connecting shaft, a connecting steel pipe, a base, a dial indicator, and a micrometer measuring scale. The connecting shaft is rotatably positioned above the mill base and is parallel to the mill base during measurement. The connecting steel pipe is vertically positioned to the connecting shaft. Two bases are provided, respectively located at both ends of the mill base and rotatably connected to the connecting shaft, supporting the connecting shaft and positioning it above the mill base. The dial indicator is installed on the mill base, with its measuring head abutting against the connecting shaft. This allows for monitoring and adjustment of the parallelism between the connecting shaft and the mill base, further ensuring that the connecting shaft remains parallel to the mill base during measurement. Furthermore, it allows for monitoring of axial movement of the connecting shaft during rotation, improving the measurement accuracy of the mill base. The micrometer measuring ruler is vertically connected to the connecting steel pipe and is used to measure the distance between the connecting shaft and the longitudinal center line after rotation. It is also used to calculate the perpendicularity between the base and the longitudinal center line. The micrometer measuring ruler can read the value in the thousandths place to obtain a more accurate perpendicularity and ensure the measurement accuracy of the rolling mill base. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the precision measuring device involved in one embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the connecting steel pipe of the precision measuring device in one embodiment of the present invention, which rotates to a first preset point.

[0019] Figure 3 This is a schematic diagram of the structure of the connecting steel pipe of the precision measuring device in another embodiment of the present invention, which rotates to the second preset point.

[0020] Figure 4 For the present invention Figure 2 A BB cross-sectional view of the connecting steel pipe at the second preset point in the Chinese embodiment.

[0021] Figure 5 For the present invention Figure 3 A cross-sectional view AA of the connecting steel pipe in the Chinese embodiment at the first preset point.

[0022] Figure 6 This is a flowchart of a precision measurement method according to one embodiment of the present invention.

[0023] Figure 7 This is a flowchart illustrating a step in a precision measurement method according to one embodiment of the present invention.

[0024] Figure 8 This is a flowchart illustrating another step in the accuracy measurement method according to one embodiment of the present invention. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0026] Furthermore, the accompanying drawings are merely illustrative diagrams of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this invention disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention.

[0027] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] This invention discloses a precision measuring device, please refer to... Figures 1 to 5This precision measuring device, installed on the mill base 10, includes a connecting shaft 1, a connecting steel pipe 2, a base 6, a dial indicator 4, and a micrometer measuring scale 5. The connecting shaft 1 is positioned above the mill base 10 and parallel to it during measurement. The connecting steel pipe 2 is vertically positioned to the connecting shaft 1. Two bases 6 are provided, one at each end of the mill base 10 and rotatably connected to the connecting shaft 1. This ensures that the connecting shaft 1 is positioned above the mill base 10, and its levelness can be adjusted via the bases 6, further improving the installation quality of the precision measuring device on the mill base 10. Two dial indicators 4 are provided, installed on the mill base 10, one below each end of the connecting shaft. The measuring head of the dial indicator 4 abuts against the connecting shaft 1. This allows for monitoring and adjustment of the parallelism between the connecting shaft 1 and the mill base 10, ensuring that the connecting shaft 1 remains parallel to the mill base 10 during measurement. Furthermore, it allows for monitoring of axial movement of the connecting shaft 1 during rotation, improving the measurement accuracy of the mill base 10. A micrometer measuring ruler 5 is vertically connected to the connecting steel pipe 2. It is used to measure the distance between the connecting shaft 1 and the longitudinal centerline L0 after rotation, and to calculate the perpendicularity between the mill base 10 and the longitudinal centerline L0. The longitudinal centerline L0 is a steel wire set on the mill base 10, located at the center of the mill base 10, serving as an auxiliary line for obtaining the installation accuracy of the mill base 10. Furthermore, the micrometer measuring ruler 5 can read values ​​in the thousands place, obtaining a more accurate perpendicularity and ensuring the measurement accuracy of the mill base 10.

[0029] Understandably, in some embodiments, the precision measuring device also includes a set screw 3. Two set screws 3 are respectively connected to the two ends of the connecting shaft 1 and connected to the base 6. The set screws 3 are used to fix the connecting shaft 1 to ensure that it does not produce additional axial movement when rotating, so as to reduce the measurement error of the installation accuracy of the mill base 10.

[0030] In some embodiments, the precision measuring device further includes a fixing member 8, which is connected to the set screw 3 and restricts the axial movement of the connecting shaft 1. Specifically, the fixing member 8 is fixedly mounted on the base 6, and the fixing member 8 can be a nut, screwed to the set screw 3. Before the connecting shaft 1 needs to rotate, the fixing member 8 fixes the set screw 3 to the end of the connecting shaft 1, so that the set screw 3 abuts against the connecting shaft 1. When the connecting shaft 1 rotates, it causes relative rotation between the set screw 3 and the nut, so that the set screws 3 at both ends of the connecting shaft tend to move towards the connecting shaft 1, thereby suppressing the axial movement tendency of the connecting shaft 1. This further avoids the axial movement of the connecting shaft 1 during rotation, which would cause the base 6 to move and affect the measurement accuracy of the perpendicularity of the mill base 10 by the precision measuring device.

[0031] Understandably, in order to eliminate reference errors, in some embodiments, the center of the base 6 and the center of the connecting shaft 1 are located on the same axis. This ensures that there is no offset error between the base 6 placed on the mill base 10 and the connecting shaft 1 mounted on the base 6. At the same time, it can also detect and eliminate any movement that may occur when the connecting shaft 1 rotates, thus preventing the movement from affecting the parallelism between the connecting shaft 1 and the mill base 10, and consequently affecting the accuracy measurement device's assessment of the perpendicularity of the mill base 10.

[0032] Because the base 6 may have some manufacturing errors or wear after long-term use, in order to ensure the parallelism between the connecting shaft 1 and the rolling mill base 10, in some embodiments, the precision measuring device also includes shims 7, of which multiple shims 7 are detachably disposed within the base 6. Specifically, the base 6 is divided into a fixed end 61 fixedly connected to the rolling mill base 10 and a connecting end 62 rotatably connected to the connecting shaft 1. The fixed end 61 and the connecting end 62 are connected by adjusting bolts 63. The shims 7 are disposed between the fixed end 61 and the connecting end 62. By adjusting the number of shims 7, the angle of the connecting shaft 1 can be adjusted to ensure the parallelism between the connecting shaft 1 and the rolling mill base 10, thereby reducing the measurement error of the perpendicularity of the rolling mill base 10 using a micrometer measuring ruler 5.

[0033] Furthermore, the thickness of the shim 7 is 0.05mm ± 0.002mm. The connecting shaft 1 can be leveled by appropriately adding or removing a certain number of shims 7 from the bases 6 on both sides. Compared to visual observation, the quantified shims 7 allow for more precise adjustment of the connecting shaft 1, ensuring it is parallel to the mill base 10.

[0034] Furthermore, to ensure that the accuracy of the perpendicularity measurement of the mill base 10 is not affected by the mill base 10's own offset when measuring its perpendicularity, in some embodiments, the accuracy measuring device also includes a level. The level is placed on the mill base 10, and by adding or removing leveling shims below the mill base 10, the apex of the bubble arc in the level 9 is positioned on the center line of the scale. At this time, the connecting shaft 1 is set parallel to the mill base 10, ensuring that the value of the micrometer ruler 5 on the connecting steel pipe 2 can be directly read without being affected by the tilt angle of the mill base 10, thus improving the measurement accuracy of the perpendicularity of the mill base 10.

[0035] To ensure the effectiveness of the dial indicator 4 in detecting the parallel alignment of the connecting shaft 1 and the mill base 10, in some embodiments, the dial indicator 4 further includes a magnetic base 41, which is installed on the mill base 10. On one hand, the magnetic base 41 provides a zero-hysteresis monitoring platform for the dial indicator 4, further enhancing its real-time feedback to the connecting shaft 1. This ensures the parallelism between the connecting shaft 1 and the mill base 10 and monitors any axial movement of the connecting shaft 1 during rotation. On the other hand, the working conditions of a mill are typically harsh; the magnetic base 41, with its high strength and resistance to environmental influences, is more suitable for the mill's working environment.

[0036] In some embodiments, the precision measuring device further includes a mounting steel pipe 51 for mounting a micrometer measuring scale 5. The mounting steel pipe 51 is perpendicular to the connecting steel pipe 2 and parallel to the connecting shaft 1. By mounting the steel pipe 51, the micrometer measuring scale 5 can be displaced as the connecting shaft 1 rotates, avoiding unnecessary errors caused by the operator holding the micrometer measuring scale 5 by hand. Furthermore, the mounting steel pipe 51 being parallel to the connecting shaft 1 allows for the acquisition of the straight-line distance to the longitudinal centerline L0 when the micrometer measuring scale 5 reaches a designated position for measurement, improving the measurement accuracy of the perpendicularity between the rolling mill base 10 and the longitudinal centerline L0.

[0037] This invention discloses a method for measuring accuracy; please refer to [the relevant documentation]. Figures 6 to 8 ,include: Step S1: Adjust the level of the mill base 10 and move the precision measuring device onto the mill base 10.

[0038] In some application scenarios, after ensuring that the mill base 10 is placed horizontally on the ground, the operator places any of the aforementioned precision measuring devices on the mill base 10. Specifically, a level 9 is used. The level 9 is placed on the plane of the mill base 10, and the level is adjusted by adding or removing leveling shims under the mill base 10. The position of the arc apex of the bubble on the level 9 is constantly observed until the arc apex of the bubble is located on the center line of the scale on the level 9. At this point, the mill base 10 is completely horizontal and will not cause errors in the subsequent measurement of the perpendicularity of the mill base 10 to the longitudinal center line L0.

[0039] Step S2: Adjust the elevation of the connecting shaft 1 and its parallelism with the mill base 10, and fix the base 6 to the mill base 10.

[0040] In some applications, after placing the precision measuring device on the mill base 10, the connecting shaft 1 is moved to a preset height. This facilitates operation by the operator while preventing damage to the mill base 10 or the longitudinal centerline L0. Once the connecting shaft 1 is ensured to be parallel to the mill base 10, it can be considered an equivalent substitute for the mill base 10. Measuring the perpendicularity of the connecting shaft 1 to the longitudinal centerline L0 is considered equivalent to the perpendicularity of the mill base 10 to the longitudinal centerline L0, and the installation accuracy of the mill base 10 is determined based on this perpendicularity.

[0041] Step S3: Rotate the connecting shaft 1 until the measuring end of the micrometer measuring ruler 5 is close to the longitudinal center line L0, and calculate the perpendicularity between the mill base 10 and the longitudinal center line L0.

[0042] In some application scenarios, the connecting shaft 1 is rotated to move the connecting steel pipe 2 until the measuring end of the micrometer measuring ruler 5 approaches the set longitudinal center line L0. As the connecting steel pipe 2 rotates, it approaches two preset points near the longitudinal center line L0 in sequence. The distance from the two preset points to the longitudinal center line L0 is measured by the micrometer measuring ruler 5. The perpendicularity of the mill base 10 to the longitudinal center line L0 is calculated based on the distance, and the installation accuracy of the mill base 10 is determined.

[0043] To more accurately determine the levelness of the mill base 10 and the connecting shaft 1, a dial indicator 4 is also needed as a reference for the parallelism standard. Therefore, step S2 specifically includes: Step S21: Move connecting shaft 1 to the preset height.

[0044] In some application scenarios, while ensuring the levelness of the mill base 10, the base 6 is placed on the mill base 10. The connecting shaft 1 is adjusted to a suitable height, which can be set according to the actual operating scenario. This facilitates operator operation and allows the connecting steel pipe 2 to rotate with the connecting shaft. This prevents the connecting steel pipe 2 from colliding with the mill base 10 when rotating with the micrometer measuring ruler 5 to the longitudinal center line L0, which could damage the instrument or cause contact with the longitudinal center line L0, affecting the measurement accuracy of the verticality of the mill base 10.

[0045] Step S22: Adjust the number of shims 7 so that the pointers of the dial indicator 4 at both ends of the connecting shaft 1 no longer deviate.

[0046] In some applications, by placing a certain number of shims 7 between the fixed end 61 and the connecting end 62 of the base 6, the connecting shaft 1 is gradually adjusted to be parallel to the rolling mill base 10. The parallelism between the connecting shaft 1 and the rolling mill base 10 is then determined by the pointer of a dial indicator. The magnetic base 41 of the dial indicator 4 is installed on the rolling mill base 10, with the pointer tip of the dial indicator 4 resting on the connecting shaft 1. The operator observes the readings of the dial indicator 4 at both ends of the connecting shaft 1 to determine the parallelism between the connecting shaft 1 and the rolling mill base 10. When the pointer of the dial indicator 4 stops fluctuating, the connecting shaft 1 and the rolling mill base 10 have achieved parallelism.

[0047] The thickness of the shims 7 can be kept consistent, allowing operators to determine the level adjustment height based on the number of shims 7, which facilitates later recording and summarization.

[0048] Step S23: Fix the base 6 to the rolling mill base 10.

[0049] In some application scenarios, after the connecting shaft 1 is set parallel to the mill base 10, the base 6 is fixed to the mill base 10 by spot welding to prevent the relative movement between the base 6 and the mill base 10 due to inertial force when the connecting shaft 1 rotates and drives the connecting steel pipe 2.

[0050] To more accurately measure the installation accuracy of the rolling mill base 10, the perpendicularity of the rolling mill base 10 to the longitudinal centerline L0 is used as a quantitative standard, and to further improve the accuracy of the perpendicularity calculation, step S3 specifically includes: Step S31: Rotate the connecting shaft 1 to bring the measuring end of the micrometer measuring scale 5 to the first preset point A, and obtain the distance reading from the micrometer measuring scale 5. .

[0051] In some application scenarios, the first preset point A is a point at a specific height when the connecting steel pipe 2 swings along the longitudinal centerline L0 and gradually approaches the longitudinal centerline L0. The straight-line distance between the first preset point A and the longitudinal centerline L0 is measured using a micrometer measuring ruler 5 at the tail end of the connecting steel pipe 2. It will be used to calculate verticality.

[0052] Step S32: Continue rotating the connecting shaft 1 until the measuring end of the micrometer measuring scale 5 reaches the second preset point B, and obtain the distance reading from the micrometer measuring scale 5. .

[0053] In some application scenarios, the connecting shaft 1 continues to rotate, causing the connecting steel pipe 2 to continue rotating until it reaches the second preset point B. The first preset point A and the second preset point B are at the same height, which can be set according to the operating environment and the operator's habits. The straight-line distance between the second preset point B and the longitudinal centerline L0 is measured using a micrometer 5 at the end of the connecting steel pipe 2. It will be used to calculate verticality.

[0054] Understandably, in some applications, dial indicator 4 can be used to monitor the axial movement of connecting shaft 1. If the pointer of dial indicator 4 fluctuates while connecting shaft 1 is rotating, this indicates axial movement of connecting shaft 1. The operator needs to adjust set screw 3 to lock connecting shaft 1, and then continue rotating connecting shaft 1 to the first preset point A or the second preset point B to complete the distance measurement. and distance Measurement.

[0055] Step S33: According to the formula The perpendicularity of the mill base 10 to the longitudinal centerline L0 is calculated. Here, the first preset point A and the second preset point B are points close to the longitudinal centerline L0, and D is the distance between the first preset point A and the second preset point B.

[0056] In some application scenarios, distance and distance These are the readings of micrometer ruler 5, obtained through the formula... The perpendicularity of the mill base 10 to the longitudinal centerline L0 is calculated, and this perpendicularity is used as the criterion for evaluating the installation accuracy of the mill base 10. Understandably, the closer the perpendicularity σ is to 0, the better the installation accuracy of the mill base 10, and the flatter the installation of the mill base 10.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precision measuring device, installed on the base of a rolling mill, characterized in that, include: The connecting shaft is rotatably positioned above the mill base; A connecting steel pipe is vertically positioned on the connecting shaft; The base has two parts, which are respectively located at both ends of the rolling mill base and rotatably connected to the connecting shaft; Two dial indicators are provided and installed on the mill base, with the measuring head of the dial indicator abutting against the connecting shaft; A micrometer measuring ruler is vertically connected to the connecting steel pipe.

2. The precision measuring device as described in claim 1, characterized in that, Also includes: There are two set screws, which are respectively connected to the two ends of the connecting shaft.

3. The precision measuring device as described in claim 2, characterized in that, Also includes: A fastener is attached to the set screw and restricts the axial movement of the connecting shaft.

4. The precision measuring device as described in claim 1, characterized in that, The center of the base and the center of the connecting shaft are on the same axis.

5. The precision measuring device as described in claim 1, characterized in that, Also includes: Multiple gaskets are provided and are detachably disposed within the base.

6. The precision measuring device as described in claim 1, characterized in that, The dial indicator also includes a magnetic base, which is mounted on the mill base.

7. The precision measuring device as described in claim 1, characterized in that, Also includes: A steel pipe is installed for mounting the micrometer measuring ruler, and is arranged perpendicular to the connecting steel pipe and parallel to the connecting shaft.

8. A method for measuring accuracy, characterized in that, The precision measuring device according to any one of claims 1-7 comprises: Adjust the levelness of the mill base and move the precision measuring device onto the mill base; Adjust the elevation of the connecting shaft and its parallelism with the mill base, and then fix the base to the mill base. Rotate the connecting shaft to bring the measuring end of the micrometer measuring ruler close to the longitudinal center line, and calculate the perpendicularity of the mill base to the longitudinal center line.

9. The accuracy measurement method as described in claim 8, characterized in that, The adjustment of the connecting shaft elevation and parallelism with the rolling mill base, and the fixing of the base to the rolling mill base, includes: Move the connecting shaft to a preset height; Adjust the number of shims so that the dial indicator pointers at both ends of the connecting shaft no longer deviate; The base is fixedly connected to the rolling mill base.

10. The accuracy measurement method as described in claim 8, characterized in that, The process of rotating the connecting shaft to bring the measuring end of the micrometer gauge closer to the longitudinal centerline, and calculating the perpendicularity of the mill base to the longitudinal centerline, includes: Rotating the connecting shaft causes the measuring end of the micrometer to reach a first preset point, and the micrometer reading acquires the distance. ; Continue rotating the connecting shaft until the measuring end of the micrometer reaches the second preset point, at which point the micrometer reading is obtained. ; According to the formula: The perpendicularity of the rolling mill base to the longitudinal centerline is calculated, wherein the first preset point and the second preset point are points close to the longitudinal centerline. D The distance between the first preset point and the second preset point.

Images