Method for measuring fixed base elevation and levelness of horizontal-vertical conversion rolling mill

Abstract

The application discloses a method for measuring the elevation and levelness of a fixed base of a flat-stand conversion rolling mill, which adopts rough adjustment of a flat base plate combined with fine adjustment of an auxiliary measuring device to measure and adjust the elevation and levelness of the fixed base of the flat-stand conversion rolling mill. First, the flat base plate is fixed, and the elevation and levelness of the flat base plate are adjusted. Then, the fixed base is hoisted and placed on the pre-set base iron group. Finally, after the fixed base is in place, the elevation and levelness of the fixed base are finely adjusted by the auxiliary measuring device. The core shaft is used as the auxiliary measuring device, the core shaft is arranged in the hydraulic clamping hole and the guide wheel mounting hole, and the working surface is led out for measurement, which is convenient to operate and effectively improves the measurement accuracy. The method for measuring the elevation and levelness of the fixed base of the flat-stand conversion rolling mill by rough adjustment of the base plate combined with fine adjustment of the core shaft can conveniently and accurately measure the elevation and levelness of the fixed base, and ensures the installation accuracy of the fixed base.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical equipment maintenance, specifically relating to a method for measuring the elevation and levelness of the fixed base of a horizontal-vertical conversion rolling mill. Background Technology

[0002] The horizontal-to-vertical conversion rolling mill has two operating modes, and it frequently switches between horizontal and vertical modes according to production needs. To ensure that the mill can operate normally in both modes, it is necessary to ensure that the output shafts of the horizontal-to-vertical conversion reducer and the umbrella-shaped reducer on the mill's rotating base can connect normally with the ground reducer in both production modes. The positioning accuracy of the mill's rotating base directly affects the connection accuracy between the two reducers and the ground reducer. To ensure the positioning accuracy of the mill's rotating base, the most critical factor is to ensure the installation accuracy of the four hydraulic clamps on the fixed base that lock the horizontal and vertical states of the rotating base. Due to the structural characteristics of the fixed base, the only machined surfaces are the bottom surface, sides, and hydraulic clamp holes of the fixed base. To ensure the elevation and levelness of the fixed base, the conventional method is to ensure the installation accuracy of the pads under the base. However, due to the large number of pads, the low installation accuracy, and the difficulty in directly measuring the bottom surface of the fixed base, the installation accuracy of the upper fixed base cannot be guaranteed, affecting the positioning accuracy of the rotating base and the normal use of the mill's horizontal-to-vertical conversion function.

[0003] In the existing technology, the conventional installation technology of the flat-vertical conversion rolling mill includes leveling and elevation of the base. However, the leveling is done using a level instrument, and the elevation is found by measuring the bottom surface of the base. However, the specific leveling method is not described in detail. Due to the narrow installation space on site and the fact that the bottom surface of the base and the pad are in close contact, it is not possible to measure the elevation by measuring the bottom surface elevation during actual installation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for measuring the elevation and levelness of the fixed base of a horizontal-vertical conversion rolling mill, which solves the problems of high difficulty in measuring the levelness and elevation of the base and low installation accuracy in the existing technology during the installation of a horizontal-vertical conversion rolling mill.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill involves coarse adjustment with a flat shim plate combined with fine adjustment using an auxiliary measuring device. First, the flat shim plate is fixed, and its elevation and levelness are adjusted. Second, the fixed base is hoisted and placed on a pre-set set of shims. Finally, after the fixed base is in place, its elevation and levelness are precisely adjusted using the auxiliary measuring device.

[0007] The specific process for coarse adjustment of the flat pad is as follows:

[0008] The flat pads are installed using the grouting method. Adjusting nuts are welded to the four corners of the flat pads, and the adjusting nuts are movably connected to the screws fixed on the equipment foundation. The elevation of the flat pads is checked using a precision level and the elevation of each flat pad is recorded. The levelness of the flat pads is checked using a frame-type or strip-type level. After all the flat pads are adjusted to the target range using the nuts, they are filled with grout.

[0009] Before the fixed base is in place, configure and place the pad assembly according to the elevation measurement record of each flat pad, and control the relative elevation of all pad assemblies by 0.05mm.

[0010] After the fixed base is in place, use a 0.03mm feeler gauge to check the contact between each set of pads and the bottom plane of the equipment and make a record; install the measuring mandrel in the hydraulic clamp hole to measure the elevation of the fixed base, the horizontal levelness, and the relative height difference between the two fixed bases.

[0011] During the hoisting and fixing of the base, a professional hoisting tool is used to hoist the base to the installation position. Two 5-ton hoists are hung on the professional hoisting tool. When the base is hoisted above the screw rod by the crane hook, it is aligned and then lowered by the hoists. The base is then placed steadily on the pad assembly.

[0012] The auxiliary measuring device includes four measuring mandrels installed on the hydraulic clamping holes of the horizontal position fixed base and the operating side guide wheel mounting holes. The horizontality of the fixed base is controlled by adjusting the relative height difference of the measuring mandrels. The installation elevation of the fixed base is determined by the height difference between the center line of the hydraulic clamping hole of the horizontal position fixed base and the rolling center line, and the height difference between the center line of the operating side guide wheel mounting hole and the rolling center line.

[0013] A 0.02 mm / m bar level is installed inside the hydraulic clamp hole to measure the levelness of the fixed base in the rolling direction.

[0014] Use a feeler gauge of 0.05-1mm to measure the top and side clearances between the mandrel and the hole, and then level the mandrel.

[0015] After the mandrel is leveled, the elevation and levelness of the fixed base are measured and adjusted using a precision level and an indium steel ruler. At the same time, a frame level is used to check the levelness of the machined surface of the fixed base.

[0016] The method for measuring the verticality of the fixed base is as follows: Suspend a 0.5mm steel wire and a counterweight on the fixed base, and use an inside micrometer to measure the vertical deviation of the base to determine the verticality of the fixed base. The inspection surface is the machined surface of the hydraulic clamp mounting hole. At the same time, a frame level can be used to check the verticality of the base by perpendicularizing the machined surface of the base.

[0017] The method for determining the direction and position of the rolling center line of the fixed base is as follows:

[0018] When installing the fixed base, make a steel string frame on the center mark plate pre-embedded in the mill and stretch the piano wire to pull out the center line of the mill line. Adjust the center position of the fixed base according to the inner spacing of the fixed base and the center distance of the horizontal fixed seat positioning key.

[0019] The process for determining the directional position of the fixed-base rolling mill is as follows:

[0020] When installing the fixed base, install the measuring mandrel on the guide wheel mounting hole on the operating side of the base, center the measuring mandrel, find the mandrel center line, determine the direction and position of the rolling center line of the fixed base according to the distance from the guide wheel mounting hole to the rolling center line, place an electronic theodolite on the auxiliary line of the rolling center line and use a steel ruler to measure the distance from the guide wheel mounting hole of the fixed base to the auxiliary line.

[0021] After the fixed base is in place, tighten the bolts using a hydraulic wrench to achieve a preload of 4236 N·m. Use a 0.03 mm feeler gauge to check that the contact circumference between the fixed base and the shim is greater than 75%. Adjust the elevation, levelness, and verticality of the fixed base according to the rolling center line, and then adjust the positioning center line of the fixed base to ensure that it matches the dimensions in the drawing and meets the installation accuracy requirements.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Using a mandrel as an auxiliary measuring device, the mandrel is set in the hydraulic clamp hole and the guide wheel mounting hole, and the working surface is brought out before measurement, which facilitates operation and effectively improves measurement accuracy.

[0024] 2. The method of measuring the elevation and level of the fixed base of the flat-vertical conversion rolling mill by combining coarse adjustment with mandrel fine adjustment with shim plate can conveniently and accurately measure the elevation and level of the fixed base, ensuring the installation accuracy of the fixed base.

[0025] 3. This measurement method is simple and effective, and can significantly improve the installation accuracy of the fixed base of the flat-vertical conversion rolling mill, shorten the installation time, reduce the probability of equipment failure, and has a good prospect for application and promotion. Attached Figure Description

[0026] Figure 1 This is a top view of the horizontal-vertical conversion rolling mill.

[0027] Figure 2 This is a side view of the horizontal-vertical conversion rolling mill.

[0028] Figure 3 This is a schematic diagram of the flat pad adjustment structure of the present invention.

[0029] Figure 4 This is a diagram showing the elevation and levelness measurement of the shims in this invention.

[0030] Figure 5This is a schematic diagram of the fixed base hoisting of the present invention.

[0031] Figure 6 This is a schematic diagram of the installation of the fixed base of the present invention.

[0032] Figure 7 This is a schematic diagram of the horizontal alignment of the measuring mandrel in this invention.

[0033] Figure 8 This is a schematic diagram showing the elevation and leveling of the fixed base of the present invention.

[0034] The markings in the diagram are as follows: 1-Rolling mill motor; 2-Ground reducer; 3-Horizontal to vertical conversion reducer; 4-Rolling mill; 5-Rotating base; 6-Fixed base; 7-Locking hydraulic clamp; 8-Rotating base guide wheel; 9-Rolling mill locking hydraulic clamp; 10-Slurry pit; 11-Fully threaded screw; 12-Frame or strip level; 13-Fixing nut; 14-Adjusting nut; 15-Equipment foundation; 16-Measuring mandrel; 17-Strip level; 18-Felt gauge position; 19-Invar steel ruler; 20-Pad set; 21-Precision level; 22-Rolling center line; 23-Lifting tool; 24-Crane hook; 25-Hand chain hoist; 26-Wire rope; 27-Center line of hydraulic clamp hole in horizontal position fixed seat; 28-Center line of guide wheel mounting hole on operating side; 29-Piano wire; 30-Plumb bob; 31-Center marker plate. Detailed Implementation

[0035] The structure and working process of the present invention will be further described below with reference to the accompanying drawings.

[0036] The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill involves coarse adjustment with a flat shim plate combined with fine adjustment using an auxiliary measuring device. First, the flat shim plate is fixed, and its elevation and levelness are adjusted. Second, the fixed base is hoisted and placed on a pre-set set of shims. Finally, after the fixed base is in place, its elevation and levelness are precisely adjusted using the auxiliary measuring device.

[0037] The method of measuring the elevation and level of the fixed base of the flat-vertical conversion rolling mill by combining coarse adjustment with mandrel fine adjustment with shim plate can conveniently and accurately measure the elevation and level of the fixed base, ensuring the installation accuracy of the fixed base.

[0038] Specific embodiments, such as Figures 1 to 8 As shown,

[0039] A method for measuring the elevation and levelness of the fixed base of a horizontal-vertical conversion rolling mill, wherein the horizontal-vertical conversion rolling mill includes a rolling mill motor 1, a ground reducer 2, a horizontal-vertical conversion reducer 3, a rolling mill 4, a rotating base 5, a fixed base 6, a locking hydraulic clamp 7, a rotating base guide wheel 8, and a rolling mill locking hydraulic clamp 9; the elevation and levelness of the fixed base 6 of the horizontal-vertical conversion rolling mill are measured and adjusted by coarse adjustment using a flat shim plate combined with fine adjustment using an auxiliary measuring device; the coarse adjustment method of the flat shim plate is as follows:

[0040] The flat pads are installed using the grouting method. Fixing nuts 13 and adjusting nuts 14 are welded to the four corners of the flat pads. The fixing nuts 13 are spot-welded to the flat pads, and the adjusting nuts 14 are movably connected to the screw rod fixed on the equipment foundation 15. The screw rod is a fully threaded screw rod 11. A precision level 21 is used to check the elevation of the flat pads, and the elevation of each flat pad is recorded. A frame-type or strip-type level 12 is used to check the levelness of the flat pads, verifying that the levelness meets the specifications (elevation (-0.5~0) mm, longitudinal and transverse levelness 0.05 / 1000 mm). After all the flat pads are adjusted to the target range using the adjusting nuts 14, they are grouted.

[0041] In this embodiment, the grouting pit is no less than 30mm on each side of the flat pad, and the specifications of other components are matched and adjusted according to the site requirements.

[0042] Hoisting and fixing the base: Before fixing the base, configure and place the pad group 20 according to the elevation measurement record of each flat pad. The relative elevation of all pad groups 20 is controlled by 0.05mm.

[0043] During the hoisting and fixing of the base, a professional lifting tool 23 is used to hoist the base to the installation position. Two 5-ton hand chain hoists 25 are hung on the professional lifting tool. When the base is hoisted above the screw by the crane hook 24 and aligned, the hand chain hoists 25 are used to lower it and place the base steadily on the pad assembly.

[0044] A 0.02 mm / m bar level is installed inside the hydraulic clamp hole to measure the levelness of the fixed base in the rolling direction.

[0045] After the fixed base is in place, use a 0.03mm feeler gauge to check the contact between each set of pads and the bottom plane of the equipment and make a record; install the measuring mandrel in the hydraulic clamp hole to measure the elevation of the fixed base, the horizontal levelness, and the relative height difference between the two fixed bases.

[0046] After the fixed base is in place, tighten the bolts using a hydraulic wrench to achieve a preload of 4236 N·m. Use a 0.03 mm feeler gauge to check that the contact circumference between the fixed base and the shim is greater than 75%. Adjust the elevation, levelness, and verticality of the fixed base according to the rolling center line, and then adjust the positioning center line of the fixed base to ensure that it matches the dimensions in the drawing and meets the installation accuracy requirements.

[0047] The auxiliary measuring device includes a measuring mandrel 16, a bar level 17, and an indium steel ruler 19. The measuring mandrel 16 includes four parts, which are respectively installed on the hydraulic clamping holes of the horizontal position fixing base and the guide wheel mounting holes on the operating side. The horizontality of the fixing base is controlled by adjusting the relative height difference of the measuring mandrel 16. The installation elevation of the fixing base is determined by the height difference between the center line 27 of the hydraulic clamping hole of the horizontal position fixing base and the rolling center line 22, and the height difference between the center line 28 of the guide wheel mounting hole on the operating side and the rolling center line 22.

[0048] Simultaneously, use a frame level to check the levelness of the machined surface of the fixed level base. The measurement steps are as follows:

[0049] A. Leveling of the hydraulic clamp hole of the fixed base: Use a 0.02mm / m bar level to measure the longitudinal levelness of the fixed base within the hydraulic clamp hole.

[0050] B. Horizontal alignment of the mandrel; use a 0.05-1mm feeler gauge to measure the top and side clearances between the mandrel and the hole. The feeler gauge position is shown in Figure 18. Horizontally align the mandrel.

[0051] C. Fixing the elevation and level of the fixed base; measuring the elevation and level of the fixed base using a precision level and an indium steel ruler.

[0052] Adjust the elevation and level of the fixed base by adding or subtracting shims on the flat plate according to the rolling center line to ensure that it matches the dimensions in the drawing and meets the installation accuracy requirements (elevation allowable deviation ±0.25mm, level 0.05 / 1000mm).

[0053] The method for measuring the verticality of the fixed base is as follows: Suspend a 0.5mm steel wire and a counterweight on the fixed base, and use an inside micrometer to measure the vertical deviation of the base to determine the verticality of the fixed base. Use the machined surface of the hydraulic clamp mounting hole as the inspection surface. At the same time, a frame level can be used to check the verticality of the base by perpendicularizing the machined surface of the base.

[0054] Using a mandrel as an auxiliary measuring device, the mandrel is set in the hydraulic clamp hole and the guide wheel mounting hole, and the working surface is brought out before measurement, which facilitates operation and effectively improves measurement accuracy.

[0055] The method for determining the direction and position of the rolling center line of the fixed base is as follows:

[0056] When installing the fixed base, make a steel string frame on the center mark plate 31 pre-embedded in the mill and stretch the piano wire 29. The lower end of the piano wire 29 is suspended by a plumb bob 30. Pull out the center line of the mill line and adjust the center position of the fixed base according to the inner spacing of the fixed base and the center distance of the horizontal fixed seat positioning key.

[0057] The process for determining the directional position of the fixed-base rolling mill is as follows:

[0058] When installing the fixed base, install the measuring mandrel on the guide wheel mounting hole on the operating side of the base, center the measuring mandrel, find the mandrel center line, determine the direction and position of the rolling center line of the fixed base according to the distance from the guide wheel mounting hole to the rolling center line, place an electronic theodolite on the auxiliary line of the rolling center line and use a steel ruler to measure the distance from the guide wheel mounting hole of the fixed base to the auxiliary line.

[0059] This measurement method is simple and effective, and can significantly improve the installation accuracy of the fixed base of the flat-vertical conversion rolling mill, shorten the installation time, and reduce the probability of equipment failure. It has a good prospect for application and promotion.

[0060] 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.

[0061] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention, and will not be elaborated here either.

[0062] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A method for measuring the elevation and levelness of the fixed base of a horizontal-vertical conversion rolling mill, characterized in that: The elevation, levelness, and verticality of the fixed base of the horizontal-to-vertical conversion rolling mill are measured and adjusted using a combination of coarse adjustment with a flat pad and fine adjustment with an auxiliary measuring device. The auxiliary measuring device includes four measuring mandrels installed on the hydraulic clamping holes and the operating side guide wheel mounting holes of the horizontal fixed base. The relative height difference of the measuring mandrels controls the installation level of the fixed base. The installation elevation of the fixed base is determined by the height difference between the center line of the hydraulic clamping hole and the rolling center line, and the height difference between the center line of the operating side guide wheel mounting hole and the rolling center line. A 0.02mm / m strip level is installed in the hydraulic clamping hole to measure the levelness of the fixed base in the rolling direction. A 0.05-1mm feeler gauge is used to measure the top and side clearances between the mandrels and the holes to align the measuring mandrels horizontally. After the mandrels are aligned horizontally, the elevation of the fixed base is measured and adjusted using a precision level and an indium steel ruler. Levelness is checked using a frame level and the machined surface of the fixed base. First, the flat pad is fixed and its elevation and levelness are adjusted. Second, the fixed base is hoisted and placed on the pre-set shim set. Finally, after the fixed base is in place, a 0.03mm feeler gauge is used to check the contact between each set of shims and the bottom plane of the equipment and the results are recorded. The measuring mandrel in the hydraulic clamp hole is installed to measure the elevation, lateral levelness, and relative height difference between the two fixed bases. The contact circumference between the fixed base and the shims is checked with a 0.03mm feeler gauge and is greater than 75%. The elevation, levelness, and verticality of the fixed base are adjusted according to the rolling center line, and then the positioning center line of the fixed base is adjusted to ensure that it matches the dimensions in the drawing and meets the installation accuracy requirements. The elevation and levelness of the fixed base are precisely adjusted using an auxiliary measuring device.

2. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 1, characterized in that: The specific process for coarse adjustment of the flat pad is as follows: The flat pads are installed using the grouting method. Adjusting nuts are welded to the four corners of the flat pads, and the adjusting nuts are movably connected to the screws fixed on the equipment foundation. The elevation of the flat pads is checked using a precision level and the elevation of each flat pad is recorded. The levelness of the flat pads is checked using a frame-type or strip-type level. After all the flat pads are adjusted to the target range using the nuts, they are filled with grout.

3. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 2, characterized in that: Before the fixed base is in place, configure and place the pad assembly according to the elevation measurement record of each flat pad, and control the relative elevation of all pad assemblies by 0.05mm.

4. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 1, characterized in that: During the hoisting and fixing of the base, a professional hoisting tool is used to hoist the base to the installation position. Two 5-ton hand chain hoists are hung on the professional hoisting tool. When the base is hoisted above the screw by the crane hook, it is aligned and then lowered by the hand chain hoist. The base is then placed steadily on the pad assembly.

5. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 1, characterized in that: This also includes measuring the verticality of the fixed base, the specific method of which is as follows: Suspend a 0.5mm steel wire and a counterweight on the fixed base, and use an inside micrometer to measure the vertical deviation of the base to determine the verticality of the fixed base; use the machined surface of the hydraulic clamp mounting hole as the inspection surface, and at the same time, use a frame level to check the verticality of the base by perpendicularizing the machined surface of the base.

6. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 1, characterized in that: This also includes determining the direction and position of the rolling center line of the fixed base, the specific method of which is as follows: When installing the fixed base, make a steel string frame on the center mark plate pre-embedded in the mill and stretch the piano wire to pull out the center line of the mill line. Adjust the center position of the fixed base according to the inner spacing of the fixed base and the center distance of the horizontal fixed seat positioning key.

7. The method for measuring the elevation and levelness of the fixed base of the horizontal-vertical conversion rolling mill according to claim 1, characterized in that: This also includes determining the directional position of the fixed-base rolling mill, the specific process of which is as follows: When installing the fixed base, install the measuring mandrel on the guide wheel mounting hole on the operating side of the base, center the measuring mandrel, find the mandrel center line, determine the direction and position of the rolling center line of the fixed base according to the distance from the guide wheel mounting hole to the rolling center line, place an electronic theodolite on the auxiliary line of the rolling center line and use a steel ruler to measure the distance from the guide wheel mounting hole of the fixed base to the auxiliary line.

Images