JP5510187B2 - Processing method of mating surfaces of steel structures - Google Patents

Description

  The present invention relates to a method for processing a mating surface of a steel structure.

  When building a steel structure facility by combining a steel structure and a steel structure locally due to aging, etc., the dimensional accuracy (height and inclination) of multiple combined surfaces (mating surfaces) in each steel structure It is necessary to calculate and determine the processing amount of the mating surface based on the calculated dimensional accuracy, and after processing the mating surface with the processing amount, it is necessary to combine them.

  In a conventional method for processing a mating surface of a steel structure (especially a large steel structure), the steel structure is first calculated when calculating the dimensional accuracy (height and inclination) of multiple mating surfaces. Measure the inclination of the whole object with a level gauge equipped with a level gyro sensor, check the level of other mating surfaces with piano wire or laser irradiation based on a certain mating surface, and measure the dimensions with a micrometer etc. Thus, a method of calculating the dimensional accuracy (height and inclination) of the other mating surfaces is performed.

  For small parts that can be easily held by hand, the degree of flatness is investigated with a laser to improve the plane machining accuracy (see, for example, Patent Documents 1 and 2), but large steel that exceeds human height. There is no example applied to the structure, and it relies on the above-mentioned manual work.

JP 2010-054399 A JP 2000-097666 A

  However, the processing method of the mating surface of the steel structure as described above (calculation method of the dimensional accuracy of the mating surface) takes a lot of labor and time, and a measurement error occurs due to a human error, etc. The processing of the mating surface does not go smoothly, but after actually combining the steel structures on site, the work to remove and rework the mating surface occurs, and the work does not proceed as planned, repair or construction There was a problem that the operation of the steel structure equipment to be hindered. In addition, there was no point in shortening the construction process to meet the recent demand for increased production.

  The present invention has been made in view of the circumstances as described above. When a steel structure facility is constructed by combining a steel structure and a steel structure by aging renewal or the like, the steel structure is aligned locally. To provide a method for processing a mating surface of a steel structure, which can accurately calculate the dimensional accuracy (height and inclination) of the mating surface in a short time without trouble in processing the surface. It is the purpose.

  In order to solve the above problems, the present invention has the following features.

[1] In order to construct a steel structure facility by combining the first steel structure and the second steel structure,
First, for a plurality of mating surfaces in the first steel structure, a plurality of measurement points are set on the respective mating surfaces, and a three-dimensional laser measurement apparatus that can obtain a three-dimensional coordinate position of the measurement points is used. 3D coordinate positions of a plurality of measurement points are measured, a virtual reference plane is created from the obtained 3D coordinate position data of all measurement points, and the virtual reference planes of the remaining mating planes are created using a specific mating plane as a reference. Calculate the dimensional accuracy for the surface,
Next, the virtual reference plane is created in the same manner as described above for the plurality of mating surfaces in the second steel structure, and the dimensions of the remaining mating surfaces with respect to the virtual reference plane are based on the specific mating surface. Calculate accuracy,
Based on the calculated dimensional accuracy of the mating surface of the first steel structure and the dimensional accuracy of the mating surface of the second steel structure, the processing amount of the mating surface is determined so as to eliminate the deviation of these dimensional accuracy. The processing method of the mating surface of the steel structure characterized by this.

  [2] The method for processing a mating surface of a steel structure according to [1], wherein the number of measurement points on the mating surface is four or more.

  [3] The method for processing a mating surface of a steel structure according to [1] or [2], wherein only the mating surface of any one of the steel structures is processed.

  In the present invention, the three-dimensional coordinate positions of a plurality of mating surfaces of the steel structure are measured, a virtual reference surface is created from the obtained three-dimensional coordinate position data, and the remaining mating surfaces are determined based on a certain mating surface. Since the dimensional accuracy (height and inclination) with respect to the virtual reference plane is calculated, the dimensional accuracy of the mating surface can be accurately adjusted without being troubled in a short time without being affected by the horizontal level of the entire steel structure. I can grasp it. As a result, there is no need to redo the mating surface processing, and the process can be shortened.

It is a top view explaining the calculation method of the dimensional accuracy of the mating surface at the time of the converter update in the Example of this invention. It is a figure which shows the measuring point on the mating surface in the Example of this invention. It is a figure which shows the calculation result of the dimensional accuracy of the mating surface by the side of the trunnion ring in the Example of this invention. It is a figure which shows the calculation result of the dimensional accuracy of the mating surface by the side of a converter furnace in the Example of this invention.

  In the present invention, when a steel structure facility is constructed by combining the first steel structure and the second steel structure on site due to renewal or the like, a plurality of mating surfaces (3 When calculating the dimensional accuracy (height, inclination) of the surface or higher), the 3D laser measuring device has a function to set the measurement reference coordinates common to each mating surface, A virtual reference plane is created from the three-dimensional coordinate position data of all the measurement points above. This makes it possible to create a virtual reference plane with little influence from the individual inclination and height of each mating surface.

  Note that when creating the virtual reference plane, a plane that minimizes the sum of the distances of perpendiculars from each measurement point to the plane is set as the virtual reference plane.

  Next, by using a measurement point of a certain mating surface as a reference (zero base), it becomes possible to accurately grasp the dimensional accuracy (height and inclination) of the remaining mating surfaces.

  And by using such a method, the calculation accuracy of the dimensional accuracy (height, inclination) of the mating surface is improved, and the measurement analysis time for calculating the dimensional accuracy of the mating surface can be greatly shortened. Become.

  Incidentally, in the above, a virtual reference plane is created for each mating plane using the three-dimensional coordinate position data of the measurement points of each mating plane, and an entire virtual reference plane is created from the virtual reference plane for each mating plane. Although a method is also conceivable, the error becomes large in that method.

  And from the dimensional accuracy of each mating surface, the first steel structure and the second steel structure when the virtual reference surface of the first steel structure and the virtual reference surface of the second steel structure are overlapped Since the dimensional deviation (dimension mismatch amount) between the corresponding mating surfaces of the objects is known, the processing amount of the mating surface is determined so as to eliminate the dimensional deviation (dimension mismatch amount). At that time, it is preferable from the viewpoint of work efficiency to process only the mating surface of one of the steel structures.

  In the present invention, the number of measurement points on each mating surface is preferably 4 or more. As a result, variations in the inclination of the mating surfaces due to the effects of local irregularities can be minimized, leading to an increase in the accuracy of the virtual reference surface.

  In this way, in the present invention, when processing the mating surface of the steel structure on site by aging renewal or the like, it is possible to accurately calculate the dimensional accuracy of the mating surface in a short time without trouble. it can. As a result, there is no need to redo the mating surface processing, and the process can be shortened.

  Embodiments of the present invention will be described with reference to the drawings.

  In this embodiment, the present invention is applied when a converter equipment is constructed by installing (combining) a new converter furnace body on an existing trunnion ring when the converter furnace body is updated.

  FIG. 1 is a plan view showing a trunnion ring 10 in this embodiment. As shown in FIG. 1, this trunnion ring 10 includes a first mating surface (rebound steel side on the driving side) 11 and a second mating surface (on the steeling side on the driving side) as mating surfaces (installation surfaces). ) 12, a third mating surface (rebound steel side on the non-driving side) 13, and a fourth mating surface (reeling steel side on the non-driving side) 14. In addition, 15 in FIG. 1 is a cotter.

  Then, with reference points (here, 6 points) 19 set on the trunnion ring 10 as a reference, the three-dimensional laser measurement device 20 is installed at an appropriate position, and measurement and analysis are performed on-site by the above-described procedure of the present invention. Then, the dimensional accuracy (height and inclination) of each mating surface was calculated.

  FIG. 2 shows the arrangement of the measurement points set on the respective mating surfaces 11 to 14. Here, nine measurement points are set.

  Here, the dimensional accuracy (height and inclination) of the other mating surfaces 12 to 14 was calculated based on the first mating surface 11.

  FIG. 3 shows the dimensional accuracy (height and inclination) of the mating surface on the trunnion ring side, and FIG. 3 (a) shows the dimensional accuracy of the second mating surface (driving side on the drive side). 3 (b) shows the dimensional accuracy of the fourth mating surface (on the non-driving side and the steel output side).

  On the other hand, for the new converter furnace body (not shown), the dimensional accuracy (height and inclination) of the corresponding mating surfaces was calculated in the same manner as described above.

  FIG. 4 shows the dimensional accuracy (height and inclination) of the mating surface on the furnace body side, and FIG. 4 (a) shows the dimensional accuracy of the second mating surface (driving side on the driving side), FIG. (B) has shown the dimensional accuracy of the 4th mating surface (on the non-driving side and the steel output side).

  As a result, as shown in FIG. 3A, the height of the mating surface on the trunnion ring side is 0.2 mm / 700 mm when the second mating surface (on the driving side is the steel output side) from the outside to the inside. As shown in FIG. 3 (b), the fourth mating surface (on the non-drive side on the steel output side) has a tendency of a decrease of 0.1mm / 700mm from the outside toward the inside. It was.

  On the other hand, the height of the mating surface of the furnace body is as shown in FIG. 4 (b), whereas the second mating surface (on the driving side and the steel output side) is substantially horizontal, as shown in FIG. 4 (a). As shown, there was a tendency for the fourth mating surface (the steel output side on the non-driving side) to decrease by 1.3 mm / 700 mm from the outside toward the inside.

  Then, based on the data of these dimensional accuracy, the processing amount of the mating surface on the trunnion ring side was calculated, and the mating surface on the trunnion ring side was processed.

  In addition, after processing the mating surface on the trunnion ring side, the three-dimensional laser measuring device 20 was installed again based on the reference point 19, and the processing accuracy of the mating surface was confirmed.

  After that, when the converter furnace body was combined with the trunnion ring, rework did not occur, and a good result was obtained that the combination succeeded at once.

  In this embodiment, the case of renewal of the converter body has been described, but the present invention is not limited to this, and when renewing a large-diameter pipe, the mating surface of the flange portion deformed due to aging deterioration and the same. In order to match the mating surface of the new flange part to be connected, it can be applied to cases where the dimensional accuracy of the mating surface of the deformed flange part is measured in advance and reflected in the production of the new flange part. .

  The present invention can also be applied to a mill housing span and a roll chocks pan of a primary mill system.

  The present invention can be used for processing of mating surfaces of various facilities and apparatuses.

10 trunnion ring 11 first mating surface (rebound steel side on the drive side)
12 Second mating surface (on the drive side, the steel output side)
13 Third mating surface (rebound steel side on the non-drive side)
14 Fourth mating surface (on the non-driving side, the steel output side)
15 cotter 19 reference point 20 3D laser measuring device

Claims (3)

In order to construct a steel structure facility by combining the first steel structure and the second steel structure, when processing the mating surfaces,
First, for a plurality of mating surfaces in the first steel structure, a plurality of measurement points are set on the respective mating surfaces, and a three-dimensional laser measurement apparatus that can obtain a three-dimensional coordinate position of the measurement points is used. 3D coordinate positions of a plurality of measurement points are measured, a virtual reference plane is created from the obtained 3D coordinate position data of all measurement points, and the virtual reference planes of the remaining mating planes are created using a specific mating plane as a reference. Calculate the dimensional accuracy for the surface,
Next, the virtual reference plane is created in the same manner as described above for the plurality of mating surfaces in the second steel structure, and the dimensions of the remaining mating surfaces with respect to the virtual reference plane are based on the specific mating surface. Calculate accuracy,
Based on the calculated dimensional accuracy of the mating surface of the first steel structure and the dimensional accuracy of the mating surface of the second steel structure, the processing amount of the mating surface is determined so as to eliminate the deviation of these dimensional accuracy. The processing method of the mating surface of the steel structure characterized by this.   The method for processing a mating surface of a steel structure according to claim 1, wherein the plurality of measurement points on the mating surface is four or more.   3. The method for processing a mating surface of a steel structure according to claim 1, wherein only the mating surface of one of the steel structures is processed.

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