Method for assembling and resetting a large-size ring-shaped cylindrical structure

Abstract

The application provides a large-size annular cylindrical structure assembling and tire removal reset control method, which is composed of structure large component tire position assembling control, structure building shaping, structure tire removal pre-planning and tool placement, structure tire removal hoisting and placement, leveling tool fast leveling structure level, center shaft lifting tool shaft centering with structure shaft centering, structure reset control; large component assembling stage is measured by instrument, tire frame leveling, center lifting shaft tool and instrument measurement control cylinder inner wall radius size, several shaft center ring lines are arranged at different heights of structure inner wall; structure shaping is hoisted and removed, leveling tool fast levels structure to realize structure safe tire removal and fast reset; the application can satisfy annular cylindrical structure large component assembly and finished tire removal reset fast and accurate measurement and adjustment, and solve structure large component assembling and tire removal fast reset control problem.

Description

Technical Field

[0001] This invention relates to the field of product precision control technology, and in particular to a method for assembling and resetting a large-size annular cylindrical structure. Background Technology

[0002] At present, the application of annular cylindrical structures is becoming more and more widespread. In the shipbuilding industry, with the fluctuation of international shipping prices, shipping costs and carbon emission control, green shipbuilding is becoming more and more important. Civil ships are implementing energy-saving and emission-reduction strategies, and many ships have installed energy-saving devices, such as energy-saving rings and fairings. Because these annular cylindrical structures are generally large in size and difficult to form in one piece, they need to be cut and processed first, then assembled, and then repositioned after assembly.

[0003] Especially in the structural assembly and unloading stage, due to uneven ground, limited manufacturing space, high structural forming precision requirements, and the need for unloading and rapid repositioning of the unloaded structure, traditional technologies struggle to achieve high-precision and rapid assembly and unloading repositioning operations. Summary of the Invention

[0004] The purpose of this invention is to provide a method for assembling a large-sized annular cylindrical structure and controlling the repositioning of the lower tire.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A method for assembling a large-size annular cylindrical structure and controlling the lower tire repositioning includes the following steps: Step S1: Assemble the structure on the jig position, and use several tooling jigs arranged in a ring on the jig position to support the structure and adjust the horizontal height of the structure. Step S2: The tooling and rangefinder are used to control the circumferential radius of the inner wall of the structure by lifting the tooling fixture and the rangefinder at the center axis of the ring axis where the tooling fixture is located, and at least two axial ring lines are set at different heights of the inner wall of the structure. Step S3: After all components of the structure are assembled, remove the central shaft lifting fixture from the jig position; Step S4: Plan the tire position site under the structure. Mark the site with a line of the same shape as the structure and mark the positions of four leveling fixtures. Take the center of the marked line as the placement position of the central shaft lifting fixture and mark it. Place the central shaft lifting fixture and leveling fixture according to the above markings. Step S5: Lift the structure from the jig position to the site and place the structure on the leveling fixture. Step S6: Based on the axis of the structure, use the leveling fixture to level it at four points, and then support it at multiple points after leveling. Step S7: Adjust the central shaft lifting fixture to align the axis of the central shaft lifting fixture with the axis of the structure. Step S8: Install a rangefinder on the measuring plate on the top of the central shaft lifting fixture and rotate it 360° around the axis to measure the circumferential radius of any plane within the lifting range of the central shaft lifting fixture; Step S9: Analyze the data measured by the rangefinder when the structure is in the tire position and the data measured by the rangefinder at the current site. If there is no change between the two sets of data, the structure reset control is completed.

[0006] Furthermore, step S1 includes using a total station to measure the parameters of each component when assembling the large structural components in the tire position.

[0007] Furthermore, step S2 includes installing an auxiliary tooling flange at the axis of the structure, and aligning the auxiliary tooling flange with the lifting tooling set on the central axis.

[0008] Further, step S6 includes, A plumb bob is suspended at the center of the auxiliary tooling flange, with the plumb bob's plumb pointing downwards towards the center area of ​​the rotating disk of the central shaft lifting tooling. Adjust the center shaft lifting fixture so that the center of the turntable of the center shaft lifting fixture is aligned with the plumb line center. The alignment is completed when the deviation is no more than 1mm.

[0009] Furthermore, the structure is made of steel, aluminum alloy, or composite material.

[0010] In the large component assembly stage, this invention controls the inner wall radius of the cylinder by using instrument measurement, jig leveling, and a central lifting shaft tooling and instrument measurement. Different assembly gaps and shrinkage compensation amounts are set according to the component materials. Several axial loops can be set at different heights on the inner wall of the structure. The connection process can be monitored throughout the assembly control.

[0011] After the structure is formed, it is hoisted and lowered from the mold. The leveling fixture quickly and horizontally adjusts the structure to achieve safe lowering and rapid horizontal repositioning.

[0012] This invention can meet the requirements of rapid, accurate and quick testing and adjustment of the assembly and tire repositioning of large components of annular cylindrical structures, and solve the control problem of rapid repositioning of large components after tire removal. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the tire position assembly control of the structure of the present invention; Figure 2 This is a schematic diagram showing the placement of the tooling in front of the tire under the structure of the present invention; Figure 3 This is a schematic diagram showing the placement of the lower tire of the structure of the present invention; Figure 4 This is a schematic diagram of the horizontal leveling and axis alignment of the structure of the present invention; Figure 5This is a schematic diagram of the structure reset control of the present invention.

[0014] Figure label: 1. Structural body; 2. Auxiliary tooling flange; 3. Fixture frame; 4. Central shaft lifting tooling. 5. Axis centerline, 6. Marking line, 7. Leveling fixture position, 8. Placement position. 9. Leveling fixture, 10. Plumb bob, 11. Distance measuring instrument. Detailed Implementation

[0015] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] This embodiment proposes a method for assembling a large-size annular cylindrical structure and controlling the lower tire repositioning, including the following steps: Step S1, as follows Figure 1 As shown, the structure 1 is assembled on the tire position, and the horizontal height is adjusted by several tooling frames 3 arranged in a ring on the tire position; when assembling the large components of the structure 1 on the tire position, the parameters of each component are measured using a total station. The tooling frames 3 are preferably four, and the four tooling frames 3 are arranged in a square. The material of structure 1 can be steel, aluminum alloy or composite material. The main inner diameter of structure 1 is 2 to 15 meters. When assembling structure 1, different assembly gaps and shrinkage compensation amounts are set according to different materials to control the main dimensions.

[0017] Step S2: Control the circumferential radius of the inner wall of the structure 1 by using the lifting fixture 4 at the center axis of the ring axis where the fixture jig 3 is located and the rangefinder 11. Install the auxiliary fixture flange 2 at the center axis of the structure 1. The auxiliary fixture flange 2 is aligned with the lifting fixture 4 at the center axis. Set at least two axial ring lines 5 at different heights of the inner wall of the structure 1.

[0018] Step S3: All components of structure 1 are assembled. At this time, structure 1 is built and ready for the lowering of the tire. Take out the central shaft lifting fixture 4 from the tire position.

[0019] Step S4: In the absence of a fixed tire position, plan the tire position site for structure 1. Since most factory floors are not level, they need to be leveled first. like Figure 2 and Figure 3As shown, mark the site with a line 6 of the same shape as the structure 1, mark the positions of four leveling fixtures 7, mark the center of the circle of the mark line 6 as the placement position 8 of the central shaft lifting fixture 4, and place four leveling fixtures 9 and one central shaft lifting fixture 4 from the tire position according to the marked leveling fixture positions 7 and placement positions 8.

[0020] Step S5: Hoist the structure 1 from the tire position to the site and place the structure 1 on the leveling fixture 9.

[0021] Step S6: Based on the axis ring line 5 of structure 1, use the leveling fixture 9 to level structure 1 at four points, and then support structure 1 at multiple points after leveling.

[0022] Step S7: Adjust the central shaft lifting fixture 4 to align the axis of the central shaft lifting fixture 4 with the axis of the structure 1. The alignment method is as follows: Figure 4 As shown, a plumb bob 10 is suspended at the center of the auxiliary tooling flange 2, with the plumb bob 10 pointing downwards towards the center area of ​​the rotating disk of the central shaft lifting tooling 4. Adjust the central shaft lifting fixture 4 so that the center of the turntable of the central shaft lifting fixture 4 is aligned with the plumb line 10. The alignment is completed when the deviation is no more than 1mm.

[0023] Step S8, as follows Figure 5 As shown, a rangefinder 11 is installed on the measuring plate on the top of the central shaft lifting fixture 4 and rotates 360° around the axis to measure the circumferential radius of any plane within the lifting range of the central shaft lifting fixture 4.

[0024] Step S9: Analyze the data measured by the distance measuring instrument 11 and the total station when the structure 1 is in the tire position and the data measured by the distance measuring instrument 11 at the current site. If there is no change between the two sets of data, the reset control of the structure 1 is completed.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for assembling a large-size annular cylindrical structure and controlling the lower tire repositioning, characterized in that, Includes the following steps: Step S1: Assemble the structure (1) on the tire position, and use several tooling frames (3) arranged in a ring on the tire position to support the structure (1) and adjust the horizontal height of the structure (1); Step S2: The lifting fixture (4) and the rangefinder (11) at the center axis of the ring axis where the fixture jig (3) is located control the circumferential radius of the inner wall of the structure (1), and set at least two axial ring lines (5) at different heights of the inner wall of the structure (1). Step S3: After all the components of the structure (1) are assembled, remove the central shaft lifting fixture (4) from the tire position. Step S4: Plan the tire position site of the structure (1), mark the marking line (6) that is the same shape as the structure (1) on the site, mark the positions of four leveling fixtures (7), take the center of the marking line (6) as the placement position of the central shaft lifting fixture (4) (8) and mark it, and place the central shaft lifting fixture (4) and leveling fixture (9) according to the above marking. Step S5: Hoist the structure (1) from the tire position to the site and place the structure (1) on the leveling fixture (9); Step S6: Based on the axial ring line (5) of the structure (1), use the leveling fixture (9) to level it at four points, and the structure (1) will be supported at multiple points after leveling. Step S7: Adjust the central shaft lifting fixture (4) to align the axis of the central shaft lifting fixture (4) with the axis of the structure (1); Step S8: Install a rangefinder (11) on the measuring plate on the top of the central shaft lifting fixture (4) and rotate it 360° around the axis to measure the circumferential radius of any plane within the lifting range of the central shaft lifting fixture (4); Step S9: Analyze the data measured by the distance measuring instrument (11) when the structure (1) is in the tire position and the data measured by the distance measuring instrument (11) at the current site. If there is no change between the two sets of data, the structure (1) reset control is completed.

2. The method for assembling and lower tire repositioning of a large-size annular cylindrical structure according to claim 1, characterized in that, Step S1 includes measuring the parameters of each component using a total station when assembling the large components of the structure (1) in the tire position.

3. The method for assembling and lower tire repositioning of a large-size annular cylindrical structure according to claim 1, characterized in that, Step S2 includes installing an auxiliary tooling flange (2) on the axis of the structure (1), and aligning the auxiliary tooling flange (2) with the central shaft lifting tool (4).

4. The method for assembling and lower tire repositioning of a large-size annular cylindrical structure according to claim 3, characterized in that, Step S6 includes, A plumb bob (10) is suspended at the center of the auxiliary tooling flange (2), with the plumb bob (10) pointing downwards towards the center of the rotating disk of the central shaft lifting tooling (4); Adjust the center shaft lifting fixture (4) so ​​that the center of the turntable of the center shaft lifting fixture (4) is aligned with the center of the plumb bob (10). The alignment is completed when the deviation is no more than 1mm.

5. The method for assembling and lower tire repositioning of a large-size annular cylindrical structure according to claim 1, characterized in that, The structure (1) is made of steel, aluminum alloy, or composite material.

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