Method for positioning a tire frame

Abstract

This invention discloses a jig positioning method, comprising the following steps: Step 1: Obtain multiple jigs, each jig including a base, a support column, and a flange. One end of the support column is connected to the base, and the other end is connected to the flange. The flange is inclined relative to the horizontal plane. Install the bases of the multiple jigs on the ground. Step 2: Input the jig data into a total station based on the jig data of the multiple jigs to establish a three-dimensional coordinate system. Obtain the three-dimensional coordinates of the center position of the flange of each jig using the total station. Step 3: Obtain the minimum height h1 and maximum height h2 of the flange of each jig. Using one jig as a reference, rotate the flanges of the remaining jigs around the vertical direction to determine the installation angle of the remaining jigs. In this way, by simply finding the coordinate point of the center position of the flange using a total station and then measuring the minimum or maximum height of the flange, the positioning accuracy of the jig can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building engineering, and particularly relates to a jig positioning method. BACKGROUND

[0002] The jig is a metal structure, which is a support frame mainly used for bearing and stress, and is a special auxiliary tooling measure for facilitating structure assembly and controlling assembly accuracy, and is widely used in building steel structure engineering. The jig forms required by the building structure form and construction method are different.

[0003] In large public buildings such as tower building engineering and large-span stadium engineering, pipe truss steel structures are often used as the main structure due to the needs of the appearance aesthetics of the building, the overall economy, the structural reliability and the like. The pipe truss steel structure is a lattice structure composed of main and secondary rod members connected at the ends. The main and secondary rod members are both circular pipe rod members, and the main and secondary rod members are connected by flanges. The pipe truss steel structure has various forms, mainly including grid sheet truss, triangular lattice truss, quadrangular lattice truss, polygonal lattice truss and the like. Due to the large size of the pipe truss steel structure, the rod members of the pipe truss steel structure are transported in a single rod member mode. The pipe truss steel structure needs to be pre-assembled on the ground during on-site construction, and is hoisted as a whole after being made into a sheet body. Since the pipe truss steel structure cannot be adjusted in precision in the air after being made into a sheet body, the size precision of the pipe truss components needs to be strictly controlled during pre-assembly on the ground. At the same time, due to the needs of the appearance modeling and structural stress of the building engineering, the pipe truss steel structure has a streamlined modeling, so that the ends of the main and secondary rod members are connected in a bevel mode, and cannot be directly pre-assembled on the ground. Therefore, a special jig needs to be designed according to the specific structure modeling of the pipe truss steel structure, and the jig is positioned on the ground first, and then the pipe truss steel structure is pre-assembled on the jig.

[0004] When the pipe truss steel structure is composed of triangular, quadrangular, polygonal and other spatial lattice trusses, in order to ensure the precision matching of the pre-assembly, the flanges of the jig need to be aligned with the ends of the main and secondary rod members to ensure that the rod members can be matched and positioned on the jig. The pipe truss cutout is mostly a bevel, and the corresponding jig is also mostly a bevel cylinder. The flanges of the corresponding jig are in a spatial inclined state, and the flanges are generally circular structures. The position of the flange of the jig is measured by using a total station instrument. At least three three-dimensional coordinates of different points on the flange need to be measured to determine the installation angle of the flange. However, the existing total station instrument cannot accurately find the coordinate points on the circular flange, which leads to low positioning precision of the jig. SUMMARY

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a tire frame positioning method that can improve the positioning accuracy of the tire frame.

[0006] The jig positioning method according to an embodiment of the present invention includes the following steps: Step 1: Obtaining multiple jigs, each jig including a base, a support column, and a flange, one end of the support column being connected to the base and the other end being connected to the flange, the flange being inclined relative to the horizontal plane, and installing the bases of the multiple jigs on the ground; Step 2: Inputting the jig data of the multiple jigs into a total station to establish a three-dimensional coordinate system, and obtaining the three-dimensional coordinates of the center position of the flange of each jig using the total station; Step 3: Obtaining the minimum height h1 and maximum height h2 of the flange of each jig, and using one jig as a reference, rotating the flanges of the remaining jigs around the vertical direction to determine the installation angle of the remaining jigs.

[0007] The tire frame positioning method according to embodiments of the present invention has at least the following beneficial effects:

[0008] When locating the relative positions of multiple jigs, first input the jig data into a total station. Use the total station to find the three-dimensional coordinates of the center position of the flange of each jig. Then, install the jigs in their respective positions and obtain the minimum and maximum heights of the flanges of each jig. The minimum height of the flange has a lowest point, and the maximum height of the flange has a highest point. Connect the highest and lowest points to form a first straight line. Project the first straight line vertically onto the ground to obtain a second straight line. Using the second straight line of one jig as a reference, rotate the flanges of the other jigs around the vertical direction to determine the relative positions of the second straight lines of the remaining jigs. In this way, only the coordinates of the center position of the flange need to be found by the total station, and the minimum or maximum height of the flange needs to be measured. It is not necessary to select at least three coordinate points on the flange to accurately locate the installation angle of the jig, which can improve the positioning accuracy of the jig.

[0009] According to some embodiments of the present invention, in step three, the minimum height h1 and maximum height h2 of the flange of each of the jigs are obtained using the plumb bob method.

[0010] According to some embodiments of the present invention, in step two, the three-dimensional coordinate system is converted into a polar coordinate system.

[0011] According to some embodiments of the present invention, after the installation angle of the jig is determined, a steel strip is obtained and welded between the base and the flange.

[0012] According to some embodiments of the present invention, two steel bars are provided, one of which is welded to the position of minimum height of the flange, and the other is welded to the position of maximum height of the flange.

[0013] According to some embodiments of the present invention, after the steel bars are welded, the inspection points of each flange are obtained, and the accuracy of the inspection points of each flange is verified using the total station.

[0014] According to some embodiments of the present invention, after the inspection points of each flange are verified to be correct, a fixing plate is obtained, the lower end of the fixing plate is welded to the upper side of the base, and the upper end of the fixing plate is welded to the lower side of the flange.

[0015] According to some embodiments of the present invention, a plurality of fixing plates are configured, and the plurality of fixing plates are spaced apart along the circumference of the flange.

[0016] According to some embodiments of the present invention, the fixing plate is welded to the support column on the side closest to the support column.

[0017] According to some embodiments of the present invention, the steel strip is removed after the fixing plate is welded.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic flowchart of the tire frame positioning method according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a polar coordinate positioning frame selected according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the welded steel bar for the jig frame according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the tire frame after the steel bars have been removed, according to an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of how the first straight line is projected along the vertical direction to form the second straight line in an embodiment of the present invention.

[0025] Figure label:

[0026] Frame 100, base 110, support column 120, flange 130, steel bar 140, fixing plate 150, first straight line 210, second straight line 220, origin 310, polar axis 320. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] In related technologies, a total station is an electronic measuring instrument capable of measuring angles and distances. Total stations are widely used in civil engineering surveying due to their high accuracy and ease of use. The measurement process with a total station includes the following steps: First, set the three-dimensional coordinates of the measuring station; second, set the coordinates of the backsight point or set the horizontal circle reading of the backsight direction as its azimuth. When setting the coordinates of the backsight point, the total station will automatically calculate the azimuth of the backsight direction and set the horizontal circle reading of the backsight direction as its azimuth; third, set the prism constant; fourth, set the atmospheric correction value or temperature and pressure values; fifth, measure the instrument height and prism height and input them into the total station; sixth, aim at the target prism, press the coordinate measurement key, and the total station will begin measuring distance and calculating and displaying the three-dimensional coordinates of the measuring point.

[0032] Reference Figure 1According to an embodiment of the present invention, the method for positioning a jig includes the following steps: Step 1: Obtain multiple jigs 100. Each jig 100 includes a base 110, a support column 120, and a flange 130. One end of the support column 120 is connected to the base 110, and the other end is connected to the flange 130. The flange 130 is inclined relative to the horizontal plane. The bases 110 of the multiple jigs 100 are installed on the ground. Step 2: Based on the jig data of the multiple jigs 100, the jig data is input into a total station to establish a three-dimensional coordinate system. The center position of the flange 130 of each jig 100 is obtained through the total station. Step 3: Obtain the minimum height h1 and maximum height h2 of the flange 130 of each jig 100. Using one jig 100 as a reference, rotate the flange 130 of the other jig 100 around the vertical direction to determine the installation angle of the other jig 100. In this way, it is only necessary to find the coordinate point of the center position of the flange 130 by using a total station, and then measure the minimum or maximum height of the flange 130. It is not necessary to select at least three coordinate points on the flange 130 to accurately locate the installation angle of the jig 100, which can improve the positioning accuracy of the jig 100.

[0033] Specifically, refer to Figure 1 , Figure 5 When locating the relative positions of multiple jigs 100, the jig data of the multiple jigs 100 are first input into a total station. The total station is used to find the three-dimensional coordinate point of the center position of the flange 130 of each jig 100. Then, the jigs 100 are installed in their corresponding positions, and the minimum and maximum heights of the flange 130 of each jig 100 are obtained. The minimum height of the flange 130 has a lowest point, and the maximum height of the flange 130 has a highest point. Connecting the highest and lowest points forms a first straight line 210. The first straight line 210 is then extended vertically. Projecting the second straight line 220 onto the ground, and using the second straight line 220 of one of the jigs 100 as a reference, rotating the flanges 130 of the remaining jigs 100 around the vertical direction, the relative positions of the second straight lines 220 of the remaining jigs 100 can be determined. In this way, it is only necessary to find the coordinate point of the center position of the flange 130 by using a total station, and then measure the minimum or maximum height of the flange 130. It is not necessary to select at least three coordinate points on the flange 130 to accurately locate the installation angle of the jig 100, which can improve the positioning accuracy of the jig 100.

[0034] In some embodiments of the present invention, in step three, the minimum height h1 and maximum height h2 of the flange 130 of each jig 100 are obtained by plumb bob method, which can accurately measure the minimum height h1 and maximum height h2 of the flange 130.

[0035] Specifically, by using the plumb bob method, the lowest and highest points of flange 130 can be accurately obtained, and the minimum height h1 and maximum height h2 of flange 130 can be accurately measured.

[0036] Reference Figure 2 In some embodiments of the present invention, in step two, the three-dimensional coordinate system is converted into a polar coordinate system, which can convert the three-dimensional coordinates into two-dimensional coordinates, so as to facilitate the total station to accurately measure the relative positional relationship of multiple jigs 100.

[0037] Specifically, when measuring the position of multiple jigs 100 using polar coordinates, the middle position of the flange 130 of one jig 100 is selected as the origin 310, and the middle position of the flange 130 of another jig 100 is selected as the reference point. The origin 310 and the reference point are connected to form the polar axis 320. Then, the distance between the middle position of the flange 130 of the remaining jigs 100 and the origin 310 is obtained by using a total station to obtain the polar diameter and polar angle, thereby establishing the polar coordinates of each jig 100. This allows the three-dimensional coordinates to be converted into two-dimensional coordinates, which facilitates the accurate measurement of the relative positional relationship of multiple jigs 100 by the total station.

[0038] Reference Figure 3 In some embodiments of the present invention, after the installation angle of the jig 100 is determined, a steel strip 140 is obtained and welded between the base 110 and the flange 130. After the steel strip 140 is welded, the inspection point of each flange 130 is obtained. Using a total station, the accuracy of the inspection point of each flange 130 is verified. After the inspection point of each flange 130 is verified to be correct, a fixing plate 150 is obtained. The lower end of the fixing plate 150 is welded to the upper side of the base 110, and the upper end of the fixing plate 150 is welded to the lower side of the flange 130. This can pre-fix the flange 130 to avoid deformation of the flange 130 when welding the fixing plate 150, thereby reducing the positioning error of the jig 100 and improving the positioning accuracy of the jig 100.

[0039] Specifically, by welding a steel strip 140 between the base 110 and the flange 130, the flange 130 can be pre-fixed. The steel strip 140 is located on the outside of the flange 130 and does not affect the welding of the fixing plate 150. The fixing plate 150 is sandwiched between the base 110 and the flange 130, which can prevent the flange 130 from deforming when welding the fixing plate 150, thereby reducing the positioning error of the jig 100 and improving the positioning accuracy of the jig 100.

[0040] It should be noted that there are two steel bars 140. One of the two steel bars 140 is welded to the minimum height position of the flange 130, and the other is welded to the maximum height position of the flange 130. This can improve the structural strength of the minimum height position and the maximum height position of the flange 130, so as to avoid the displacement of the lowest and highest points of the flange 130 when the total station is searching for them. This ensures that the first straight line 210 does not deviate and improves the positioning accuracy of the jig 100.

[0041] It is understandable that multiple fixing plates 150 are configured, and multiple fixing plates 150 are arranged at intervals along the circumference of the flange 130. This can improve the structural stability of the frame 100, thereby avoiding deformation caused by uneven force when the frame 100 is connected to the main or secondary members, thus improving the safety of the tubular truss steel structure.

[0042] In some embodiments of the present invention, the fixing plate 150 is welded to the support column 120 on the side close to the support column 120, which can improve the connection strength of the fixing plate 150.

[0043] Reference Figure 4 In some embodiments of the present invention, after the fixing plate 150 is welded, the steel strip 140 is cut off to avoid interference between the steel strip 140 and the main or secondary members. This not only optimizes the appearance of the jig 100, but also facilitates construction work.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A method for positioning a tire frame, characterized in that, Includes the following steps: Step 1: Obtain multiple jigs (100), each jig (100) including a base (110), a support column (120), and a flange (130). One end of the support column (120) is connected to the base (110), and the other end is connected to the flange (130). The flange (130) is inclined relative to the horizontal plane. Install the bases (110) of the multiple jigs (100) on the ground. Step 2: Based on the data of the multiple jigs (100), input the jig (100) data into a total station, establish a three-dimensional coordinate system, and obtain the three-dimensional coordinates of the center position of the flange (130) of each jig (100) through the total station; Step 3: Obtain the minimum height h1 and maximum height h2 of the flange (130) of each of the jigs (100). Taking one of the jigs (100) as a reference, rotate the flanges (130) of the remaining jigs (100) around the vertical direction to determine the installation angle of the remaining jigs (100). The minimum height of the flange (130) has a lowest point, and the maximum height of the flange (130) has a highest point. Connect the highest point and the lowest point to form a first straight line (210). Project the first straight line (210) vertically onto the ground to obtain a second straight line (220). Taking the second straight line (220) of one of the jigs (100) as a reference, rotate the flanges (130) of the remaining jigs (100) around the vertical direction to determine the relative position of the second straight line (220) of the remaining jigs (100). After the installation angle of the jig (100) is determined, steel bars (140) are obtained and welded between the base (110) and the flange (130). Two steel bars (140) are provided. One of the two steel bars (140) is welded to the position of the flange (130) at its minimum height, and the other is welded to the position of the flange (130) at its maximum height. After the steel bars (140) are welded, each flange is obtained. The inspection points of the flange (130) are verified using the total station to check whether the inspection points of each flange (130) are accurate. After the inspection points of each flange (130) are verified to be correct, the fixing plate (150) is obtained. The lower end of the fixing plate (150) is welded to the upper side of the base (110), and the upper end of the fixing plate (150) is welded to the lower side of the flange (130). After the fixing plate (150) is welded, the steel strip (140) is cut off.

2. The method for positioning the tire frame according to claim 1, characterized in that, In step three, the minimum height h1 and maximum height h2 of the flange (130) of each of the jigs (100) are obtained using the plumb bob method.

3. The method for positioning the tire frame according to claim 1, characterized in that, In step two, the three-dimensional coordinate system is converted to a polar coordinate system.

4. The method for positioning the tire frame according to claim 1, characterized in that, Multiple fixing plates (150) are provided, and the multiple fixing plates (150) are arranged at circumferential intervals along the flange (130).

5. The method for positioning the tire frame according to claim 1, characterized in that, The fixing plate (150) is welded to the support column (120) on the side near the support column (120).

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