A method for measuring the elevation of a lower roll of a stretch leveler using a total station

Abstract

This invention discloses a method for measuring the elevation of the lower roller of a leveling machine using a total station. The measurement process is as follows: fabricating a fixture; installing the first leveling machine on the base, setting up the total station with the fabricated fixture, and measuring the z-axis coordinates of both sides of the lower roller; measuring the z-axis coordinates of the elevation reference point; similarly measuring the z-axis coordinates of all the first, second, and third leveling machines; calculating the deviation between the measured value and the design value of the upper surface of the lower roller according to the drawings; calculating the thickness of the shims; adjusting the shims, and then re-measuring after adjustment. The purpose of this invention is to provide a method for measuring the elevation of the lower roller of a leveling machine using a total station. This invention, through the use of a total station and fabricated fixture, completes the elevation measurement of the lower roller of the leveling machine, solving the problem that a level cannot measure this elevation.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, and in particular relates to a method for measuring the elevation of the lower roller of a tension leveling machine using a total station. Background Technology

[0002] During the elevation measurement of the upper surface of the lower roll of the straightening machine during the major and medium overhaul of the Baogang special-shaped billet continuous casting machine, the elevation of its elevation reference point is 38.2mm, while the designed elevation of the upper surface of the lower roll of the first straightening machine is 331.5mm. The difference in elevation between the upper roll surface and the elevation reference point is 293.5mm. Due to the removal of the hydraulic pipes during the major and medium overhaul, the upper roll cannot be lifted, and the distance between the upper and lower rolls is only 200mm. It is impossible to measure using a level instrument. In recent years, with the development of technology, the accuracy of total station has improved, and it has the accuracy to measure the elevation of the straightening machine.

[0003] Comparative Reference 1 (CN202310600371.2): A tool for measuring the arc of a continuous casting machine straightening machine.

[0004] This invention provides a tool for measuring the arc deviation of a continuous casting machine straightening machine, belonging to the technical field of measuring tools. The invention includes: a square frame with a V-shaped groove at its bottom for contacting the arc of the lower roller surface of the straightening machine; a steel ruler mounted on the side of its front face; a horizontal scale located inside the lower crossbeam of the square frame; and a vertical scale located outside the upper crossbeam of the square frame. This invention can accurately measure arc deviations, significantly reducing the difficulty of inspection, improving efficiency, and saving maintenance time. However, this method cannot measure the elevation of the straightening machine after hydraulic pressure loss.

[0005] Comparative Reference 2 (CN201822221616.8): A Device for Detecting the Elevation of the Lower Roller of an Offline Tension Straightening Machine

[0006] This invention discloses a device for detecting the elevation of the lower roller of an offline straightening machine. The device comprises a detection platform, a horizontal template, and a feeler gauge. The detection platform includes a base with several horizontal support seats on its top. The upper surfaces of all the horizontal support seats together form a platform for horizontally placing the offline straightening machine. A column is positioned at each of the left and right ends of the top of the base, and the upper surfaces of two columns together form a template platform for horizontally placing the horizontal template. The distance between the template platform and the straightening machine platform corresponds to the standard elevation of the upper end face of the lower roller of the offline straightening machine. The horizontal template is horizontally placed on the template platform of the detection platform. The feeler gauge is used to detect the distance between the upper end face of the lower roller of the straightening machine and the lower surface of the horizontal template when the offline straightening machine is placed on the straightening machine platform of the detection platform. This invention has the advantage of ensuring the maintenance quality of the offline straightening machine; however, this method cannot measure the elevation of the straightening machine after hydraulic pressure loss.

[0007] Comparative Reference 3 (CN201610779304.1): A Multifunctional Testing Device and Method for a Single-Frame Tension Straightening Machine

[0008] This invention discloses a multi-functional testing device and method for a single-stand tension leveling machine, including a testing platform, a hydraulic drive mechanism for the tension leveling machine, and a hydraulic control unit. The testing platform includes an H-beam base, with a support seat on the upper surface of the base and a pad mounted on the support seat. A column is also provided on the base, with a guide rail on the column. The height of the guide rail is adjusted by shims so that the height difference between the guide rail and the pad matches the height difference from the surface of the lower roller of the single-stand tension leveling machine to the bottom of the frame of the machine. An interface corresponding to the tension leveling machine is also provided on the base. This invention has the advantages of centralized site access, time saving, and cost saving, facilitating offline maintenance of the single-stand tension leveling machine. However, this method cannot measure the elevation of the tension leveling machine after hydraulic pressure loss. Summary of the Invention

[0009] To address the problem that the elevation of the lower roll's upper surface cannot be measured using a level when the hydraulic system fails to lift the upper roll of the straightening machine during major and medium-scale repairs of Baogang's special-shaped billet continuous casting machine, the present invention aims to provide a method for measuring the elevation of the lower roll of the straightening machine using a total station. This invention utilizes a total station and a custom-made fixture to complete the elevation measurement of the lower roll of the straightening machine, thus solving the problem of the inability to measure using a level.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] This invention discloses a method for measuring the elevation of the lower roller of a leveling machine using a total station. The measurement process is as follows: A fixture is fabricated; the first leveling machine is installed on the base, and a total station is set up with the fabricated fixture to measure the z-axis coordinates of both sides of the lower roller; the z-axis coordinates of the elevation reference point are measured; similarly, the z-axis coordinates of all the first, second, and third leveling machines are measured; the deviation between the measured value and the design value of the upper surface of the lower roller is calculated according to the drawings; the thickness of the shims is calculated; the shims are adjusted, and a re-measurement is performed after adjustment.

[0012] Furthermore, specifically including:

[0013] ① Make a fixture to fix the level bubble and prism to the top of the cuboid horizontal bar. When the horizontal bar is horizontal, the level bubble is centered.

[0014] ② Install the first three-frame straightening machine onto the base, set up the total station, place the crossbar of the tooling with the prism side on one side of the upper surface of the lower roller of the straightening machine, adjust the attitude of the crossbar so that the level bubble is centered, use the total station to measure the coordinate value of this position and record its z-axis coordinate value, similarly measure the z-axis coordinate value of the other side of the lower roller and record it;

[0015] ③ Measure and record the z-axis coordinate value of the elevation reference point;

[0016] ④ Measure and record the z-axis coordinates of all first-stage tension levelers, as in step ②.

[0017] ⑤ Similarly, install the second and third tension leveling machines onto the base, and repeat steps ② and ④;

[0018] ⑥ Calculate the deviation h between the measured value and the design value of the upper surface of the lower roller of the tension leveler according to the drawings, where + represents the height and - represents the bottom.

[0019] ⑦ Calculate the thickness of the shims: Since the ground surface of the first to third leveling machines is inclined, the measured height difference is not a direct calculation of the amount of shims to be added or subtracted. It is necessary to convert the shim thickness calculation into the actual shim thickness. The calculation method is as follows:

[0020] L = h / cos(α);

[0021] Where: L is the thickness of the added or subtracted shims; h is the deviation between the measured value and the design value of the upper surface of the lower roller of the tension leveler; α is the design angle between the bottom surface of the tension leveler and the horizontal plane of the ground.

[0022] ⑧ Adjust the shims by adding or subtracting them, and then retest after the adjustment is completed.

[0023] Furthermore, the upper and lower surfaces of the crossbar are precision machined surfaces.

[0024] Furthermore, the parallelism of the upper and lower surfaces of the crossbar is controlled within 0.2 mm.

[0025] Furthermore, the level bubble and prism are bonded and fixed to the top of the cuboid crossbar.

[0026] Furthermore, the measurement accuracy of this method is improved from 1 mm to 0.1 mm.

[0027] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0028] This invention allows for the rapid measurement of the elevation of the lower roller of a tension leveling machine without hydraulic pressure using a total station. It also allows for the measurement of a prism placed on the upper surface of the lower roller using a crossbar. Personnel do not need to approach the lower roller; the prism can be leveled using the level bubble set at the tail of the fixture, making it safe and reliable. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 This is a structural diagram of a tooling structure for measuring the elevation of the lower roller of a tension leveling machine using a total station.

[0031] Figure 2This diagram illustrates the method of using a total station to measure the elevation of the lower roller of a leveling machine in conjunction with the leveling machine.

[0032] Figure 3 This is an enlarged view of a tooling method for measuring the elevation of the lower roller of a leveling machine using a total station, and its use in conjunction with the leveling machine.

[0033] Figure labeling: 1-Horizontal bar; 2-Prism; 3-Level bubble. Detailed Implementation

[0034] The implementation of the technical solution will be described in further detail below with reference to the accompanying drawings, so as to more clearly explain its structure and working principle.

[0035] As attached Figure 1 , 2 As shown in Figure 3, this invention is a method for measuring the elevation of the lower roller of a tension leveling machine using a total station. The measurement process is as follows:

[0036] ① Fabricate tooling; see structure below. Figure 1 The level bubble 3 and prism 2 are bonded to the top of the cuboid crossbar 1. When the crossbar 1 is in a horizontal state, the bubble of the level bubble 3 is centered. The upper and lower surfaces of the crossbar 1 are precision machined surfaces, and the parallelism of the upper and lower surfaces is controlled within 0.2mm.

[0037] ② Install the first three straightening machines onto the base, such as... Figure 2 As shown, set up a total station, place the crossbar 1 of the tooling on one side of the prism 2 on one side of the upper surface of the lower roller of the leveling machine, adjust the attitude of the crossbar so that the bubble of the level 3 is centered, use the total station to measure the coordinate value of this position and record its z-axis coordinate value. Similarly, measure the z-axis coordinate value of the other side of the lower roller and record it.

[0038] ③ Measure and record the z-axis coordinate value of the elevation reference point;

[0039] ④ Measure and record the z-axis coordinates of all first-stage tension levelers, as in step ②.

[0040] ⑤ Similarly, install the second and third tension leveling machines onto the base, and repeat steps ② and ④;

[0041] ⑥ Calculate the deviation h between the measured value and the design value of the upper surface of the lower roller of the tension leveler according to the drawings, where + represents the height and - represents the bottom;

[0042] ⑦ Calculate the thickness of the shims: Since the ground surface of the first to third leveling machines is inclined, the measured height difference is not a direct calculation of the amount of shims to be added or subtracted. It is necessary to convert the shim thickness calculation into the actual shim thickness. The calculation method is as follows:

[0043] L = h / cos(α);

[0044] Where: L is the thickness of the added or subtracted shims; h is the deviation of the measured value of the upper surface of the lower roller of the tension leveler from the design value; α is the design angle between the bottom surface of the tension leveler and the horizontal plane of the ground.

[0045] ⑧ Adjust the shims by adding or subtracting them, and then retest after the adjustment is completed.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A method for measuring the elevation of the lower roller of a tension leveling machine using a total station, characterized in that, The measurement process is as follows: fabricate the fixture; install the first straightening machine on the base, set up a total station and use the fabricated fixture to measure the z-axis coordinates of both sides of the lower roller; measure the z-axis coordinates of the elevation reference point; similarly measure the z-axis coordinates of all the first, second and third straightening machines; calculate the deviation between the measured value and the design value of the upper surface of the lower roller of the straightening machine according to the drawings; calculate the thickness of the shims; adjust the shims, and then re-measure after the adjustment is completed.

2. The method for measuring the elevation of the lower roller of a tension leveling machine using a total station according to claim 1, characterized in that, Specifically, it includes: ① Make a fixture to fix the level bubble and prism to the top of the cuboid horizontal bar. When the horizontal bar is horizontal, the level bubble is centered. ② Install the first three-frame straightening machine onto the base, set up the total station, place the crossbar of the tooling with the prism side on one side of the upper surface of the lower roller of the straightening machine, adjust the attitude of the crossbar so that the level bubble is centered, use the total station to measure the coordinate value of this position and record its z-axis coordinate value, similarly measure the z-axis coordinate value of the other side of the lower roller and record it; ③ Measure and record the z-axis coordinate value of the elevation reference point; ④ Measure and record the z-axis coordinates of all first-stage tension levelers, as in step ②. ⑤ Similarly, install the second and third tension leveling machines onto the base, and repeat steps ② and ④; ⑥ Calculate the deviation h between the measured value and the design value of the upper surface of the lower roller of the tension leveler according to the drawings, where + represents the height and - represents the bottom. ⑦ Calculate the thickness of the shims: Since the ground surface of the first to third leveling machines is inclined, the measured height difference is not a direct calculation of the amount of shims to be added or subtracted. It is necessary to convert the shim thickness calculation into the actual shim thickness. The calculation method is as follows: L = h / cos(α); Where: L is the thickness of the added or subtracted shims; h is the deviation between the measured value and the design value of the upper surface of the lower roller of the tension leveler; α is the design angle between the bottom surface of the tension leveler and the horizontal plane of the ground. ⑧ Adjust the shims by adding or subtracting them, and then retest after the adjustment is completed.

3. The method for measuring the elevation of the lower roller of a tension leveling machine using a total station according to claim 2, characterized in that, The upper and lower surfaces of the crossbar are precision machined.

4. The method for measuring the elevation of the lower roller of a tension leveling machine using a total station according to claim 2 or 3, characterized in that, The parallelism of the upper and lower surfaces of the crossbar is controlled within 0.2mm.

5. The method for measuring the elevation of the lower roller of a tension leveling machine using a total station according to claim 1, characterized in that, The level bubble and prism are bonded and fixed to the top of the cuboid crossbar.

6. The method for measuring the elevation of the lower roller of a tension leveling machine using a total station according to claim 1, characterized in that, The measurement accuracy of this method is improved from 1 mm to 0.1 mm.

Images