Rolling mill installation and measurement method

Abstract

The embodiment of the invention discloses a rolling mill installation and measurement method. The method comprises the following steps: establishing a precision construction control network; positioning two ends of a center line, erecting a reference disc above a deep foundation embedded at two ends of the center line of the rolling mill, positioning the reference disc, and performing guiding measurement by a construction precision control network conductor point polar coordinate method to form a closed conductor and a closed level line; positioning a rolling mill center line segmentation point, and lofting a rolling mill equipment segmentation line short line; by means of the method, the center line of the rolling mill can be accurately and reliably found, and the installation precision of the rolling mill is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical engineering, in particular to a rolling mill installation measurement method. Background Art

[0002] The steel rolling mill is a key equipment used for rolling steel in the steel industry and has the following important uses:

[0003] Steel rolling mills can process the initial steel billets into steel products of various shapes through a series of rolling processes, such as I-beams, channels, angles, H-beams and other profiles.

[0004] In addition to profiles, steel rolling mills are also capable of producing plates and tubes. For plate production, rolling mills can roll steel billets into steel plates of different thicknesses, including thin plates, medium plates and thick plates.

[0005] Steel rolling mills can also improve the strength and toughness of steel. Through plastic deformation during the rolling process, the internal structure of the steel changes, the grains are refined, and the dislocation density increases, thereby improving the strength and toughness of the steel. For example, the yield strength and tensile strength of high-strength construction steel after rolling are significantly improved, which can better meet the requirements of building structures for steel strength, while maintaining good toughness to avoid brittle fracture during use. Steel rolling mills need to accurately control the dimensional accuracy of steel during the rolling process to ensure that the produced steel meets various industry standards and application requirements.

[0006] However, the current rolling mill cannot ensure the overall positioning accuracy during installation, and the positioning points during installation are not durable and easily damaged, which affects the installation accuracy of the rolling mill and ultimately the rolling accuracy of the rolling mill. Summary of the invention

[0007] The purpose of the present invention is to solve the problems raised in the above-mentioned background technology. The present invention provides a rolling mill installation measurement method, which can accurately and reliably find the center line of the rolling mill and ensure the installation accuracy of the rolling mill.

[0008] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0009] A rolling mill installation measurement method comprises the following steps:

[0010] S1. Establishment of precision construction control network

[0011] A precision wire network and precision leveling network are laid out around the steel rolling plant area to form a precision construction control network;

[0012] S2, center line positioning

[0013] A reference disk is set up above the deep foundation buried at both ends of the center line of the rolling mill. The reference disk is positioned by the polar coordinate method of the construction precision control network wire point to form a closed wire and a closed leveling route.

[0014] S3, mill centerline split point positioning

[0015] Set up the total station at point Q on the center line, place a steel plate at the center of the instrument on the ground, aim through the crosshairs of the visual optical plummet, and use a punch to drill the steel plate to get the precise position of point Q;

[0016] S4, short-line layout of the rolling mill equipment dividing line

[0017] Without changing the position of the instrument, reset the measuring station, aim at the reference disk 1 on one side to set the zero direction, aim at the reference disk 2 on the other side to check the direction, turn the instrument to 90 degrees and 270 degrees, aim at the prism set up on the tripod respectively, fine-tune the prism to get the accurate point, then place a steel plate at the center of the prism on the ground, aim through the crosshairs of the visual optical plummet, and use a punch drill to fix a point on the steel plate to get the precise direction of the short line of the rolling mill;

[0018] S5. Repeat steps 3 and 4 to test the short lines of each equipment dividing line of the initial rolling and fine rolling, so as to realize the precise measurement of the rolling mill installation.

[0019] In step S1, the technical requirements of first-class traverse and second-class water are used for surveying. The traverse measurement uses a closed traverse, the relative mean error of the distance measurement is less than 1 / 30000, the relative mean error of the total length of the traverse is less than 1 / 15000, the total mean error of the height difference per kilometer of leveling measurement is no more than 2mm, the round-trip error and closure error are no more than 4√L, L is the route length, and the three-dimensional coordinates of the control points are obtained through rigorous adjustment.

[0020] In step S2, the average value is taken through two round trip observations and used as the control point 1 and point 2 of the rolling mill center line to control the straightness of the entire rolling mill line.

[0021] In step S3, a high-precision total station is set up at an arbitrary point Q on the center line, and the reference disks on both sides are observed using the positive and inverted mirror methods. After aiming at point 1# with the positive and inverted mirrors, the telescope is inverted to aim at point 2#, and the total station is gradually placed on the line connecting the two known points 1# and 2#, so that point Q and points 1# and 2# are collinear. At this time, a steel plate is placed at the center of the ground of the instrument, and the crosshairs of the visual optical plummet are used for aiming, and a punch is used to fix a point on the steel plate to obtain the precise position of point Q.

[0022] In step S3, the positive mirror is the left side of the reference disk, and the negative mirror is the right side of the reference disk.

[0023] In step S4, the angle deviation between the reference disk 1 and the reference disk 2 is not greater than 1″.

[0024] Beneficial effects:

[0025] The present invention first establishes a precise construction control network to ensure the overall positioning accuracy; secondly, it innovates the reference disc positioning device at both ends of the center line; then uses a high-precision total station to accurately locate the center line and the equipment dividing axis position, and cleverly uses the accurate surface point of the positioning steel plate to make the positioning point accurate and durable, and not easily damaged. The center line of the rolling mill and the dividing lines of each equipment are obtained by the above method. Each intersection ensures an accuracy of no more than 1mm, and the straightness meets the installation and use requirements of the rolling mill equipment, realizing the precise measurement of the rolling mill installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a flow chart of the rolling mill installation measurement method of the present invention;

[0028] Figure 2 This is a schematic diagram of the centerline positioning of the rolling mill line;

[0029] Figure 3 It is a schematic diagram of the rolling mill line;

[0030] Figure 4 This is a schematic diagram of wire measurement;

[0031] Figure 5 This is a schematic diagram of leveling measurement;

[0032] Figure 6 is a schematic diagram of the reference disk;

[0033] Figure 7 Schematic diagram of the total station. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] As shown in the figure, an embodiment of the present invention discloses a rolling mill installation measurement method, comprising the following steps:

[0036] S1. Establish a precise construction control network

[0037] like Figure 2As shown, a precision wire net and a precision leveling net are laid around the steel rolling plant area to form a precision control network (three-dimensional measurement and control network) for construction. The first-class wire and second-class leveling technical requirements are used for measurement. The wire measurement uses a closed wire, the relative mean error of the distance measurement is less than 1 / 30000, the relative mean error of the full length of the wire is less than 1 / 15000, the full mean error of the leveling measurement is no more than 2mm per kilometer of height difference, and the round-trip error and closure error are no more than 4√L (L is the route length). The three-dimensional coordinate results of the control points are obtained through rigorous adjustment.

[0038] S2, locate both ends of the center line

[0039] A reference disk is set up above the deep foundation at both ends of the rolling mill centerline. Figure 6 As shown, the reference disc positioning is measured by the polar coordinate method of the construction precision control network wire point to form a closed wire and a closed leveling route. The average value is taken through two round trip observations and used as the mill center line control point 1 and point 2 to control the straightness of the entire mill line.

[0040] S3, locate the mill centerline split point

[0041] Set up the total station at point Q on the center line, place a steel plate at the center of the instrument on the ground, aim with the crosshairs of the visual optical plummet, and use a punch to drill the steel plate to get the precise position of point Q. The accuracy of the total station here is 0.5″;

[0042] S4, short-line layout of the rolling mill equipment dividing line

[0043] like Figure 3 , the position of the instrument does not change, reset the measuring station, aim at the reference disk 1 on one side to set the zero direction, aim at the reference disk 2 on the other side to check the direction, turn the instrument to 90 degrees and 270 degrees, aim at the prism set up on the tripod respectively, fine-tune the prism to get the accurate point position, then place a steel plate at the center of the prism on the ground, aim through the crosshairs of the visual optical plummet, and use a punch drill to fix a point on the steel plate to get the precise direction of the short line of the rolling mill;

[0044] S5. Repeat steps 3 and 4 to test the short lines of each equipment dividing line of the initial rolling and fine rolling, so as to realize the precise measurement of the rolling mill installation.

[0045] In step S3, a high-precision total station is set up at any point Q on the center line. Figure 7 As shown in the figure, the reference disks on both sides are observed using the positive and negative mirror method, as shown in the figure. Figure 4, use the positive mirror (left of the reference disk) and the inverted mirror (right of the reference disk) to aim at point 1#, then invert the telescope to aim at point 2#, and gradually place the total station on the line connecting point 1# and point 2#, so that point Q and point 1# and point 2# are collinear. At this time, place a steel plate at the center of the ground of the instrument, aim through the crosshairs of the visual optical plummet, and use a punch to fix the point on the steel plate to obtain the precise position of point Q. There are horizontal axis errors, sight axis errors, and degree plate eccentricity errors in horizontal angle measurement, and vertical plate index errors in vertical angle observation. These errors can be observed by the positive and inverted mirror method and averaged to eliminate the influence of this error.

[0046] In step S4, the angle deviation between the reference disk 1 and the reference disk 2 is not greater than 1″.

[0047] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rolling mill installation measurement method, characterized in that: The following steps are involved: S1. Establish a precise construction control network A precision wire network and precision leveling network are laid out around the steel rolling plant area to form a precision construction control network; S2, locate both ends of the center line A reference disk is set up above the deep foundation buried at both ends of the center line of the rolling mill. The reference disk is positioned by the construction precision control network wire point polar coordinate method to form a closed wire and closed leveling route; S3, locate the mill centerline split point Set up the total station at point Q on the center line, place a steel plate at the center of the instrument on the ground, aim through the crosshairs of the visual optical plummet, and use a punch to drill the steel plate to get the precise position of point Q; S4, short-line layout of the rolling mill equipment dividing line Without changing the position of the instrument, reset the measuring station, aim at the reference disk 1 on one side to set the zero direction, aim at the reference disk 2 on the other side to check the direction, turn the instrument to 90 degrees and 270 degrees, aim at the prism set up on the tripod respectively, fine-tune the prism to get the accurate point, then place a steel plate at the center of the prism on the ground, aim through the crosshairs of the visual optical plummet, and use a punch drill to fix a point on the steel plate to get the precise direction of the short line of the rolling mill; S5. Repeat steps 3 and 4 to test the short lines of each equipment dividing line of the initial rolling and fine rolling, so as to realize the precise measurement of the rolling mill installation.

2. A rolling mill installation measurement method according to claim 1, characterized in that: In step S1, the technical requirements of first-class traverse and second-class water are used for surveying. The traverse measurement uses a closed traverse, the relative mean error of the distance measurement is less than 1 / 30000, the relative mean error of the total length of the traverse is less than 1 / 15000, the total mean error of the height difference per kilometer of leveling measurement is no more than 2mm, the round-trip error and closure error are no more than 4√L, L is the route length, and the three-dimensional coordinates of the control points are obtained through rigorous adjustment.

3. A rolling mill installation measurement method according to claim 1, characterized in that: In step S2, the average value is taken through two round trip observations and used as the control point 1 and point 2 of the rolling mill center line to control the straightness of the entire rolling mill line.

4. A rolling mill installation measurement method according to claim 3, characterized in that: In step S3, a high-precision total station is set up at an arbitrary point Q on the center line, and the reference disks on both sides are observed using the positive and inverted mirror methods. After aiming at point 1# with the positive and inverted mirrors, the telescope is inverted to aim at point 2#, and the total station is gradually placed on the line connecting the two known points 1# and 2#, so that point Q and points 1# and 2# are collinear. At this time, a steel plate is placed at the center of the ground of the instrument, and the crosshairs of the visual optical plummet are used for aiming, and a punch is used to fix a point on the steel plate to obtain the precise position of point Q.

5. A rolling mill installation measurement method according to claim 4, characterized in that: In step S3, the positive mirror is the left side of the reference disk, and the negative mirror is the right side of the reference disk.

6. A rolling mill installation measurement method according to claim 1, characterized in that: In step S4, the angular deviation between the reference disk 1 and the reference disk 2 is not greater than 1″.

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