Center line positioning and measuring device for stretch reducing mill and sizing mill

Abstract

The invention discloses a central line positioning and measuring device for a stretch reducing mill and a sizing mill, which is characterized by comprising a stretch reducing rolling direction positioning rod, a sizing rolling direction positioning rod, a sizing positioner, a level bubble, a bracket, a sizing transverse positioning rod, a stretch reducing positioner, a stretch reducing transverse positioning rod, a stretch reducing distance measuring instrument platform, a sizing distance measuring instrument platform and a distance measuring device. The invention aims to provide a central line positioning and measuring device for a stretch reducing mill and a sizing mill, which can accurately measure the central lines of the stretch reducing mill and the sizing mill without using any instrument.

Description

Technical Field

[0001] The present invention belongs to the technical field of measurement, and particularly relates to a centering and positioning measurement device for a stretch reducing mill and a sizing mill. Background Art

[0002] As important equipment in seamless steel pipe production, the sizing mill and the stretch reducing mill determine the product quality of seamless steel pipes. However, the measurement methods for them are very limited. Conventionally, the method of stretching a steel wire and cooperating with a steel ruler is used for measurement, and the measurement error will be very large. In recent years, Hong Ning and Liu Hongwei from Tianjin Junsheng Technology Development Co., Ltd. invented "A Measuring Device for Stretch Reducing Mill Frame", which can measure the sizing mill and the stretch reducing mill in an automated manner, but the production is complex. The Baotou Steel Group invented "A Measuring Method and System for the Positioning Block of a Stretch Reducing Mill", which uses a laser tracker to measure the lining plate of the positioning block of the stretch reducing mill. However, due to the wear of the lining plate of the positioning block, the rolling center line cannot be accurately found.

[0003] Comparative Document 1: The present invention provides a measuring device for a stretch reducing mill frame, including a base. A test frame body is fixedly connected to the top of the base, and an electric push rod is arranged on the top of the test frame body. The present invention positions the frame body through a cylinder, a connecting block and a positioning plate. At the same time, by rotating the threaded rod, the threaded sleeve, the sliding table and the frame body are translated under the test frame body. Then, the laser rangefinder emits light to measure the size of the positioning plate of the frame body in the corresponding direction, so as to calculate the position of the base installation center line. At the same time, the output end of the electric push rod drives the connecting rod and the positioning cone to press downwards to position the rolling center line of the frame body. By calculating the downward displacement of the positioning cone and the horizontal displacement of the sliding table during positioning, the offset between the rolling center line and the frame body installation center line is measured. The whole process is measured in an automated manner, which not only improves the convenience, but also improves the measurement quality and reduces the error. However, the production of this tooling is complex.

[0004] Comparative Document 2: The present invention discloses a method for measuring the straightness and flatness of a long-distance track. By using the reference line function of a total station to measure the center point coordinate values of each mileage position of the track, the straightness deviation value and the flatness deviation value of each mileage position can be directly obtained, and then the flatness and straightness of the track can be obtained through simple calculation. Compared with this measurement method, when using a laser tracker for measurement, its accuracy is significantly higher than that of using a total station for measurement. This method cannot be used for measuring the center lines of a sizing mill and a stretch reducing mill.

[0005] Comparative Material 3: The present invention discloses a measuring method and system for a sizing mill positioning block. The method includes: erecting and leveling, and calibrating a laser tracker to establish a geodetic horizontal plane; arranging a plurality of measuring points on each measuring surface of the positioning blocks of the sizing mill, and collecting the position data of all the measuring points on each measuring surface of the positioning blocks of the sizing mill; establishing a Cartesian coordinate system based on the position data of all the measuring points on each measuring surface of the positioning blocks in combination with the geodetic horizontal plane; and determining the deviation of each positioning block of the sizing mill by using the Cartesian coordinate system. Due to the wear of the positioning block lining plate, this method cannot accurately find the rolling center line. Summary of the Invention

[0006] In order to solve the disadvantages of large errors in traditional measuring methods, complex manufacturing of measuring devices invented in recent years, and inability to accurately find the rolling center line due to the wear of the positioning block lining plate, the object of the present invention is to provide a center line positioning and measuring device for a sizing mill and a pipe reducing mill, which can accurately measure the center lines of the sizing mill and the pipe reducing mill without using any instruments.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A center line positioning and measuring device for a sizing mill and a pipe reducing mill of the present invention includes: a sizing rolling direction positioning rod, a pipe reducing rolling direction positioning rod, a sizing positioner, a spirit level bubble, a bracket, a sizing transverse positioning rod, a pipe reducing positioner, a pipe reducing transverse positioning rod, a pipe reducing distance measuring instrument platform, a sizing distance measuring instrument platform, and a distance measuring device;

[0009] The sizing transverse positioning rod and the pipe reducing transverse positioning rod are respectively fixed in the middle of the sizing positioner and the pipe reducing positioner, and are respectively perpendicular to the sizing positioner or the pipe reducing positioner. Moreover, the sizing positioner and the pipe reducing positioner are respectively on the same horizontal plane with the upper and lower surfaces of the sizing transverse positioning rod and the pipe reducing transverse positioning rod. The lengths of the sizing transverse positioning rod and the pipe reducing transverse positioning rod are respectively the horizontal design distances from the outer surfaces of the sizing positioning block lining plate and the pipe reducing positioning block lining plate to the rolling center line. Spirit level bubbles are respectively arranged on the upper surfaces of the sizing transverse positioning rod and the pipe reducing transverse positioning rod along their lengths. Before being firmly fixed, the sizing transverse positioning rod and the pipe reducing transverse positioning rod need to be adjusted to make the spirit level bubble centered;

[0010] The sizing rolling direction positioning rod and the pipe reducing rolling direction positioning rod are respectively perpendicular to the sizing transverse positioning rod and the pipe reducing transverse positioning rod, and their upper surfaces are on the same horizontal plane. Spirit level bubbles are arranged on the upper surfaces of the sizing rolling direction positioning rod and the pipe reducing rolling direction positioning rod along their lengths. Before being firmly fixed, the sizing rolling direction positioning rod and the pipe reducing rolling direction positioning rod need to be adjusted to make the spirit level bubble centered.

[0011] Further, the side surfaces of the sizing rolling direction positioning rod facing the sizing mill and the side surfaces of the pipe reducing rolling direction positioning rod facing the pipe reducing mill are both precision machined surfaces.

[0012] Furthermore, the distance between the side of the sizing rolling direction positioning rod facing the sizing mill and the designed sizing positioning block lining is equal to the horizontal distance between the designed sizing positioning block lining and the rolling center line; the distance between the side of the stretch reducing rolling direction positioning rod facing the stretch reducing mill and the stretch reducing positioning block lining is equal to the horizontal distance between the stretch reducing positioning block lining and the rolling center line.

[0013] Furthermore, a sizing distance measuring instrument platform is provided at the bottom of the sizing rolling direction positioning rod, and the sizing distance measuring instrument platform is perpendicular to the side of the sizing rolling direction positioning rod facing the sizing mill;

[0014] A stretch reducing distance measuring instrument platform is provided at the bottom of the stretch reducing rolling direction positioning rod, and the stretch reducing distance measuring instrument platform is perpendicular to the side of the stretch reducing rolling direction positioning rod facing the stretch reducing mill.

[0015] Furthermore, during measurement, the rear of the distance measuring device is in precise and close contact with the side of the sizing rolling direction positioning rod facing the sizing mill, the bottom surface of the distance measuring device is in close contact with the upper surface of the sizing distance measuring instrument platform, and the laser of the distance measuring device is directed at the sizing positioning block lining to measure the linear distance, so that the actual horizontal distance between the sizing positioning block lining and the rolling center line can be measured;

[0016] During measurement, the rear of the distance measuring device is in precise and close contact with the side of the stretch reducing rolling direction positioning rod facing the stretch reducing mill, the bottom surface of the distance measuring device is in close contact with the upper surface of the stretch reducing distance measuring instrument platform, and the laser of the distance measuring device is directed at the stretch reducing positioning block lining to measure the linear distance, so that the actual horizontal distance between the stretch reducing positioning block lining and the rolling center line can be measured.

[0017] Furthermore, when the device is adjusted to the standard measurement state, use a bracket to firmly fix the device to the sizing mill or the stretch reducing mill.

[0018] Furthermore, before measurement, use the distance measuring device to measure the vertical linear distance between the sizing lower slide plate and the sizing upper slide plate to check the installation accuracy of the tooling, especially the vertical linear distance from the sizing upper slide plate, because the actual wear of the sizing upper slide plate is relatively small and is closer to the designed state;

[0019] Before measurement, use the distance measuring device to measure the vertical linear distance between the stretch reducing lower slide plate and the stretch reducing upper slide plate to check the installation accuracy of the tooling, especially the vertical linear distance from the stretch reducing upper slide plate, because the actual wear of the stretch reducing upper slide plate is relatively small and is closer to the designed state.

[0020] Compared with the prior art, the beneficial technical effects of the present invention:

[0021] This device, in cooperation with the distance measuring device, can measure the actual horizontal distance between the sizing positioning block lining (stretch reducing positioning block lining) and the rolling center line without using any instruments. Brief Description of the Drawings

[0022] The present invention will be further described below in conjunction with the drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the stretch reducing mill and the sizing mill in a center line positioning and measuring system for the stretch reducing mill and the sizing mill;

[0024] Figure 2 It is a perspective view of the stretch reducing mill and the sizing mill in a center line positioning and measuring system for the stretch reducing mill and the sizing mill;

[0025] Figure 3 It is a schematic diagram of the cooperation between a center line positioning and measuring system for a stretch reducing mill and a sizing mill and the stretch reducing mill and the sizing mill;

[0026] Figure 4 It is a perspective view of the cooperation between a center line positioning and measuring system for a stretch reducing mill and a sizing mill and the stretch reducing mill and the sizing mill;

[0027] Figure 5 It is an oblique view of a center line positioning and measuring system for a stretch reducing mill and a sizing mill Figure 1 ;

[0028] Figure 6 It is an oblique view of a center line positioning and measuring system for a stretch reducing mill and a sizing mill Figure 2 ;

[0029] Figure 7 It is a schematic diagram of the measurement principle of the distance measuring device in a center line positioning and measuring system for a stretch reducing mill and a sizing mill;

[0030] Description of the reference numerals: 1 - sizing mill; 2 - stretch reducing mill; 3 - stretch reducing lower slide plate; 4 - sizing lower slide plate; 5 - stretch reducing upper slide plate; 6 - sizing upper slide plate; 7 - stretch reducing positioning block lining; 8 - sizing positioning block lining; 9 - stretch reducing positioning block; 10 - sizing positioning block; 11 - stretch reducing rolling direction positioning rod; 12 - sizing rolling direction positioning rod; 13 - sizing positioner; 14 - spirit level bubble; 15 - bracket; 16 - sizing transverse positioning rod; 17 - stretch reducing positioner; 18 - stretch reducing transverse positioning rod; 19 - stretch reducing distance measuring instrument platform; 20 - sizing distance measuring instrument platform; 21 - distance measuring device. Detailed Description of the Preferred Embodiment

[0031] The implementation of the technical solution will be further described in detail below in conjunction with the drawings, so as to more clearly explain its structure and working principle.

[0032] As shown in the attached Figure 1 、 2As shown in Figures 3, 4, 5, 6, and 7, this method is a center line positioning and measuring system for a stretch reducing mill and a sizing mill. The device includes: a stretch reducing rolling direction positioning rod 11, a sizing rolling direction positioning rod 12, a sizing positioner 13, a spirit level 14, a bracket 15, a sizing transverse positioning rod 16, a stretch reducing positioner 17, a stretch reducing transverse positioning rod 18, a stretch reducing rangefinder platform 19, a sizing rangefinder platform 20, and a ranging device 21.

[0033] To illustrate the manufacturing use of this patent, the structures of the sizing mill 1 and the stretch reducing mill 2 are introduced, including: a stretch reducing lower slide plate 3, a sizing lower slide plate 4, a stretch reducing upper slide plate 5, a sizing upper slide plate 6, a stretch reducing positioning block lining 7, a sizing positioning block lining 8, a stretch reducing positioning block 9, and a sizing positioning block 10.

[0034] The contact surface of the sizing positioner 13 of this tooling with the sizing positioning block 10 is a precision machined surface, ensuring that its flatness is within 0.1 mm. The manufacturing dimensions are: the length is equal to the outer distance between a pair of positioning blocks corresponding to one frame of the sizing mill 1; the width is the same as the width of the sizing positioning block 10; and the thickness is the same as the designed thickness of the sizing positioning block lining 8. The flatness and manufacturing dimensions of the stretch reducing positioner 17 are the same as those of the sizing positioner 13.

[0035] During measurement, the sizing positioner 13 (stretch reducing positioner 17) is closely contacted with the sizing positioning block 10 (stretch reducing mill outlet last frame positioning block 9) of the first frame at the inlet of the sizing mill 1 (stretch reducing mill 2), and can be fixed firmly by welding or other means.

[0036] The sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18) is welded in the middle of the sizing positioner 13 (stretch reducing positioner 17), perpendicular to the sizing positioner 13 (stretch reducing positioner 17), and the upper and lower surfaces of the sizing positioner 13 (stretch reducing positioner 17) and the sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18) are on the same horizontal plane. The length of the sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18) is the horizontal designed distance from the outer surface of the sizing positioning block lining 8 (stretch reducing positioning block lining 7) to the rolling center line. A spirit level 14 is arranged on the upper surface of the sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18) along its length direction. Before fixing firmly, the sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18) needs to be adjusted to make the spirit level 14 centered.

[0037] The sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) is perpendicular to the sizing transverse positioning rod 16 (stretch reducing transverse positioning rod 18), and its upper surface is on the same horizontal plane. A spirit level 14 is arranged on the upper surface of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) along its length direction. Before fixing firmly, the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) needs to be adjusted to make the spirit level 14 centered.

[0038] The side of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) facing the sizing mill 1 (stretch reducing mill 2) is a precision machined surface, and the distance between the side of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) facing the sizing mill 1 (stretch reducing mill 2) and the designed sizing positioning block liner 8 (stretch reducing positioning block liner 7) is equal to the horizontal distance between the designed sizing positioning block liner 8 (stretch reducing positioning block liner 7) and the rolling center line.

[0039] A sizing distance measuring instrument platform 20 (stretch reducing distance measuring instrument platform 19) is provided at the bottom of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11), and the sizing distance measuring instrument platform 20 (stretch reducing distance measuring instrument platform 19) is perpendicular to the side of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) facing the sizing mill 1 (stretch reducing mill 2).

[0040] During measurement, the rear surface of the distance measuring device 21 is in precise close contact with the side of the sizing rolling direction positioning rod 12 (stretch reducing rolling direction positioning rod 11) facing the sizing mill 1 (stretch reducing mill 2), the bottom surface of the distance measuring device 21 is in close contact with the upper surface of the sizing distance measuring instrument platform 20 (stretch reducing distance measuring instrument platform 19), and the laser of the distance measuring device 21 is directed at the sizing positioning block liner 8 (stretch reducing positioning block liner 7) to measure the linear distance, so that the actual horizontal distance between the sizing positioning block liner 8 (stretch reducing positioning block liner 7) and the rolling center line can be measured.

[0041] When the device is adjusted to the standard measurement state, the device is firmly fixed to the sizing mill 1 (stretch reducing mill 2) using the bracket 15.

[0042] Before measurement, the vertical linear distance between the sizing lower slide plate 4 (stretch reducing lower slide plate 3) and the sizing upper slide plate 6 (stretch reducing upper slide plate 5) is measured using the distance measuring device 21 to check the installation accuracy of the tooling, especially the vertical linear distance from the sizing upper slide plate 6 (stretch reducing upper slide plate 5), because the actual wear of the sizing upper slide plate 6 (stretch reducing upper slide plate 5) is relatively small and is closer to the designed state.

[0043] The embodiments described above are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A centerline positioning and measuring device for a stretching and reducing machine and a sizing machine, characterized in that: include: Positioning rod for rolling direction of tension reduction, positioning rod for sizing rolling direction, sizing positioner, level bubble, bracket, sizing transverse positioning rod, tension reduction positioner, tension reduction transverse positioning rod, tension reduction distance meter platform, sizing distance meter platform, distance measuring device; The sizing transverse positioning rod and the tensioning and reducing transverse positioning rod are respectively fixed in the middle of the sizing positioner and the tensioning and reducing positioner, and are respectively arranged perpendicular to the sizing positioner and the tensioning and reducing positioner, and the sizing positioner and the tensioning and reducing positioner are respectively on the same horizontal plane as the upper and lower surfaces of the sizing transverse positioning rod and the tensioning and reducing transverse positioning rod, and the lengths of the sizing transverse positioning rod and the tensioning and reducing transverse positioning rod are respectively the horizontal design distances from the outer surfaces of the sizing positioning block liner and the tensioning and reducing positioning block liner to the rolling center line, and the upper surfaces of the sizing transverse positioning rod and the tensioning and reducing transverse positioning rod are respectively provided with level bubbles along their length directions, and the level bubbles should be centered by adjusting the sizing transverse positioning rod and the tensioning and reducing transverse positioning rod before being firmly fixed; The sizing rolling direction positioning rod and the tensioning and reducing rolling direction positioning rod are respectively arranged perpendicularly to the sizing transverse positioning rod and the tensioning and reducing transverse positioning rod, and their upper surfaces are in the same horizontal plane. The sizing rolling direction positioning rod and the tensioning and reducing rolling direction positioning rod are provided with level bubbles on their upper surfaces along their length directions. Before fixing them firmly, the level bubbles should be centered by adjusting the sizing rolling direction positioning rod and the tensioning and reducing rolling direction positioning rod.

2. The centerline positioning and measuring device for a stretching and reducing machine and a sizing machine according to claim 1 is characterized in that: The side of the sizing rolling direction positioning rod facing the sizing mill and the side of the stretching and reducing rolling direction positioning rod facing the stretching and reducing mill are both precision machined surfaces.

3. The centerline positioning and measuring device for a stretching and reducing machine and a sizing machine according to claim 1 or 2, characterized in that: The distance between the side of the sizing rolling direction positioning rod facing the sizing mill and the designed sizing positioning block liner is equal to the horizontal distance between the designed sizing positioning block liner and the rolling center line; The distance between the side of the tension-reduction rolling direction positioning rod facing the tension-reduction machine and the tension-reduction positioning block lining plate is equal to the horizontal distance between the tension-reduction positioning block lining plate and the rolling center line.

4. The centerline positioning and measuring device for a stretching and reducing machine and a sizing machine according to claim 1 is characterized in that: A sizing distance meter platform is arranged at the bottom of the sizing rolling direction positioning rod, and the sizing distance meter platform is perpendicular to the sizing rolling direction positioning rod facing the side of the sizing mill; A tension-reduction distance meter platform is arranged at the bottom of the tension-reduction rolling direction positioning rod, and the tension-reduction distance meter platform and the tension-reduction rolling direction positioning rod are perpendicular to the side of the tension-reduction rolling direction positioning rod facing the tension-reduction machine.

5. The centerline positioning and measuring device for a stretching and reducing machine and a sizing machine according to claim 1 is characterized in that: When measuring, the back of the distance measuring device is closely contacted with the side of the sizing rolling direction positioning rod facing the sizing mill, the bottom surface of the distance measuring device is closely contacted with the upper surface of the sizing distance measuring instrument platform, and the laser of the distance measuring device is pointed to the sizing positioning block liner to measure the straight-line distance, so that the actual horizontal distance between the sizing positioning block liner and the rolling center line can be measured; During measurement, the back of the distance measuring device is brought into close contact with the side of the tension-reduction rolling direction positioning rod facing the tension-reduction machine, the bottom surface of the distance measuring device is brought into close contact with the upper surface of the tension-reduction distance measuring instrument platform, and the laser of the distance measuring device is pointed at the tension-reduction positioning block liner to measure the straight-line distance, so as to measure the actual horizontal distance between the tension-reduction positioning block liner and the rolling center line.

6. The centerline positioning and measuring device for a stretching and sizing machine according to claim 1 is characterized in that: When the device is adjusted to a standard measuring state, the bracket is used to firmly fix the device to the sizing machine or the stretching and reducing machine.

7. The centerline positioning and measuring device for a stretching and reducing machine and a sizing machine according to claim 1 is characterized in that: Before the measurement, the distance measuring device is used to measure the vertical straight-line distance between the sizing lower slide plate and the sizing upper slide plate to check the installation accuracy of the tooling, especially the vertical straight-line distance with the sizing upper slide plate, because the actual wear of the sizing upper slide plate is small and is closer to the design state; Before measurement, the distance measuring device is used to measure the vertical straight-line distance between the lower tension-reduction slide and the upper tension-reduction slide to verify the installation accuracy of the tooling, especially the vertical straight-line distance with the upper tension-reduction slide, because the actual wear of the upper tension-reduction slide is small and is closer to the design state.

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