A rack mounting method

Abstract

The embodiment of the application provides an A-frame mounting method, comprising: positioning a ship body base of the A-frame horizontally by using a laser tracker, and controlling a horizontal deviation of an upper surface within 0.01 mm; measuring parallelism of the base by using a diagonal line connection mode of a flange bolt hole, and completing base assembly positioning; assembling the A-frame body and the ship body base into a whole, mounting a crossbeam in place, and pre-tightening a support leg of the A-frame and a flange lock screw of the ship body base to 70%; completing space coordinate measurement of an axis pin end and a harrow nest marker pole O corresponding to each of the first laser tracker, the second laser tracker and the third laser tracker, and adjusting the A-frame base by taking the O point as a coordinate origin; converting three measurement data to space coordinates with the harrow nest marker pole O as the coordinate origin, and fitting to realize coaxiality of multiple pin shafts; and connecting the base to a base reinforcing elbow plate by using a 7-shaped clamp after completing assembly positioning.

Description

Technical Field

[0001] This invention relates to the field of A-frame installation technology for research vessels, and in particular to an A-frame installation method. Background Technology

[0002] Research vessels, essential tools for ocean exploration, are equipped with powerful A-frame devices. These devices are the main supporting equipment and tools used for installation on board. However, current methods for installing A-frame devices on research vessels only employ diagonal positioning bases for positioning and horizontal tube positioning for horizontal orientation. This results in installation accuracy failing to meet the 2mm coaxiality requirement for the shaft pins. Furthermore, the welding process uses fully welded fixing clips, which cannot monitor deformation trends during welding. The entire base is fixed in place, making it impossible to adjust the welding sequence in a timely manner. After welding, removing the clips results in deformation amounts that are difficult to meet the drawing requirements. Summary of the Invention

[0003] In view of the problems existing in the prior art, this invention proposes basic technical requirements, basic installation methods, and precautions for the installation of a rigid flange on a research vessel, based on the main supporting equipment and work content of the A-frame device installation on the vessel. The use of laser tracking equipment to assist in the positioning of the A-frame base and the alignment of the axle pins, along with the use of a dial indicator in a free state to control welding deformation, effectively controls the accuracy of the A-frame after installation and the stress control during the base welding process.

[0004] This invention provides an A-frame installation method, including:

[0005] A laser tracker was used to position the hull base of frame A horizontally, and the horizontal deviation of the upper surface was controlled within 0.01mm.

[0006] The parallelism of the base is measured by connecting the diagonal lines of the flange bolt holes to complete the base assembly and positioning.

[0007] Assemble the A-frame body and the hull base as a whole, install the crossbeams in place, and pre-tighten the pre-tightening force of the flange locking bolts of the A-frame support legs and the hull base to 70%.

[0008] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the position of the first laser tracker, and the base of frame A is adjusted with point O as the coordinate origin.

[0009] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the position of the second laser tracker, and the base of frame A is adjusted with point O as the origin of the coordinates.

[0010] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the third laser tracker, and the base of frame A is adjusted with point O as the coordinate origin.

[0011] The three measurement data were transferred to a spatial coordinate system with the harrow marker O as the origin, and then fitted to achieve coaxiality of multiple pin shafts.

[0012] After the assembly and positioning are completed, the base is connected to the base reinforcement elbow plate using a figure-7 clamp.

[0013] In some embodiments of the present invention, the A-frame hull base is pre-machined to complete the overall planar machining.

[0014] In some embodiments of the present invention, the step of measuring the spatial coordinates of the corresponding shaft pin end and the harrow marker O by using the position of the first laser tracker, and adjusting the A-frame base with point O as the coordinate origin, specifically involves:

[0015] The spatial coordinates of the corresponding axle pin ends a, a', b, b', and harrow marker O are measured using the first laser tracker. With point O as the origin, the base of frame A is adjusted so that the Y and Z coordinates of axle pin ends a and a', and b and b' are consistent.

[0016] In some embodiments of the present invention, the step of measuring the spatial coordinates of the corresponding shaft pin end and the rake marker O by using the position of the second laser tracker, and adjusting the A-frame base with point O as the coordinate origin, specifically involves:

[0017] The spatial coordinates of the corresponding pin ends a″, a′, b″, b′, and harrow marker O are measured using the second laser tracker. With point O as the origin, the base of frame A is adjusted so that the Y and Z coordinates of pin end a″ approach those of pin end a′, and the Y and Z coordinates of pin end b″ approach those of pin end b′.

[0018] In some embodiments of the present invention, the step of measuring the spatial coordinates of the corresponding shaft pin end and the rake marker O by using the position of the third laser tracker, and adjusting the A-frame base with point O as the coordinate origin, specifically involves:

[0019] The spatial coordinates of the corresponding pin ends a, a″′, b, b″′, and harrow marker O are measured using the third laser tracker. With point O as the origin, the base of frame A is adjusted so that pin ends a″′ approach the Y and Z coordinates of pin ends a, and pin ends b″′ approach the Y and Z coordinates of pin ends b.

[0020] In some embodiments of the present invention, the step of transferring the three measurement data to a spatial coordinate system with the harrow marker O as the origin and fitting the data to achieve coaxiality of multiple pin shafts specifically involves:

[0021] The three measurement data were transferred to a spatial coordinate system with the harrowing marker O as the origin.

[0022] Fit the diagonal line segments ab′ and ba′ in space, and adjust ab′ to be equal in length to ba′, so that the pins bb″ and b′b″′, and aa″ and a′a″′ are coaxial.

[0023] In some embodiments of the present invention, the 7-character card is only welded to the base elbow plate and is in close contact with the deck surface.

[0024] In some embodiments of the present invention, before the 7-character dial indicator is welded to the base elbow plate, angle steel is used as a support and welded to the deck surface 200mm away from the base. A total of 16 angle steels are arranged. The dial indicator is fixed to the angle steel support using a magnetic clamp. The dial indicator contacts the edge of the base and is compressed.

[0025] In some embodiments of the present invention, a two-person symmetrical welding method is adopted during the welding process, and the dial gauge data is recorded in real time during the welding process, so that the final welding deformation is controlled within 0.5mm.

[0026] Compared with the prior art, the beneficial effects of the A-frame installation method provided in this embodiment of the invention are as follows: the A-frame base positioning uses a laser tracker to control the levelness, and the positioning level deviation can be controlled to 0.01mm; the shaft pin alignment method uses the laser tracker station transfer method to achieve coaxial installation without positioning gaps; the base welding adopts the 7-character self-deformation free control method, combined with a dial indicator to control the deformation trend in real time at 0.5mm, so that the base is in an unconstrained state during the welding process. Specifically, the micro deformation trend can be viewed in real time through the dial indicator, so as to adjust the welding sequence in time. The deformation amount after welding is controllable, thereby achieving high-precision installation of the A-frame and low-stress, high-precision welding of the base. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the method of measuring the parallelism of the base by connecting the diagonal lines of the flange bolt holes in the A-frame installation method provided in this embodiment of the invention.

[0028] Figure 2 A schematic diagram of the laser tracker relocation method in the A-frame installation method provided in this embodiment of the invention;

[0029] Figure 3 This is a schematic diagram of the base welding operation in the A-frame installation method provided in this embodiment of the invention;

[0030] Figure 4 This is a partially enlarged schematic diagram of the figure-eight clamp during the base welding process in the A-frame installation method provided in this embodiment of the invention;

[0031] Figure 5A schematic diagram showing the setting of the dial indicator during the base welding process in the A-frame installation method provided in this embodiment of the invention;

[0032] Figure 6 This is a schematic diagram of the weld seam during the base welding process in the A-frame installation method provided in this embodiment of the invention.

[0033] Figure Labels

[0034] 1. Frame A; 2. Axis pin end a; 3. Axis pin end a′; 4. Axis pin end b; 5. Axis pin end b′; 6. Axis pin end a″; 7. Axis pin end b″; 8. Axis pin end a″′; 9. Axis pin end b″′; 10. First laser tracker; 11. Second laser tracker; 12. Third laser tracker; 13. 7-character kamma. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0037] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0038] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0039] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0040] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0041] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0042] This invention provides an A-frame installation method, such as... Figures 1 to 6 As shown, it includes:

[0043] A laser tracker was used to position the hull base of frame A1 horizontally, and the horizontal deviation of the upper surface was controlled within 0.01 mm.

[0044] The parallelism of the base is measured by connecting the diagonal lines of the flange bolt holes to complete the base assembly and positioning.

[0045] Assemble the main body of A-frame 1 and the hull base into a whole, install the crossbeam in place, and pre-tighten the pre-tightening force of the flange locking bolts of the support legs of A-frame 1 and the hull base to 70%.

[0046] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the first laser tracker 10, and the base of frame A is adjusted with point O as the coordinate origin.

[0047] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the second laser tracker 11, and the base of frame A is adjusted with point O as the coordinate origin.

[0048] The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the third laser tracker at position 12, and the base of frame A is adjusted with point O as the origin of the coordinates.

[0049] The three measurement data were transferred to a spatial coordinate system with the harrow marker O as the origin, and then fitted to achieve coaxiality of multiple pin shafts.

[0050] After the assembly and positioning are completed, the base is connected to the base reinforcement elbow plate using a 7-shaped KAM13.

[0051] To facilitate understanding of the above technical solutions, a detailed explanation is provided below:

[0052] The above-mentioned A-frame installation method can also effectively improve the levelness and parallelism of the two bases, as follows:

[0053] The A-frame hull base was pre-machined in the in-house to ensure that the contact area between the base and the equipment was greater than 80%.

[0054] Furthermore, using a laser tracker to position the A-frame hull base horizontally and controlling the horizontal deviation of the upper surface within 0.01mm can effectively reduce the difficulty of adjusting the coaxiality accuracy after overall installation.

[0055] Furthermore, the parallelism of the base is measured by connecting the diagonal lines of the flange bolt holes, such as... Figure 1As shown, this effectively ensures that after A-frame 1 is assembled, there will be no inward or outward deviation in the front and rear directions, reducing the risk of crossbeam flange misalignment.

[0056] Furthermore, the base assembly and positioning are completed. The hull base and the equipment of frame A1 are rigidly connected by flanges, and no adjustment shims are set in the middle.

[0057] Then, the laser tracker relocation method was used, such as... Figure 2 and Figure 3 As shown, the following measures were implemented to solve the problem of inability to measure the coaxiality of domestically produced A-frames without positioning notches:

[0058] Assemble the main body of frame A1 with the ship's base as a whole, and install the crossbeams in place;

[0059] Furthermore, the pre-tightening force of the locking screws between the support leg and the base flange of frame A1 is pre-tightened to 70%;

[0060] Furthermore, according to the position of laser tracker I (first laser tracker 10) in the figure, complete the spatial coordinate measurement of pin end a2, pin end a′3, pin end b4, pin end b′5, and harrow marker O. With point O as the coordinate origin, adjust the A frame base so that pin end a2 and pin end a′3, and pin end b4 and pin end b′5 are consistent with coordinate Y and coordinate Z respectively.

[0061] Furthermore, according to the position of laser tracker II (second laser tracker 11) in the figure, complete the spatial coordinate measurement of pin end a″6, pin end a′3, pin end b″7, pin end b′5, and harrow marker O. With point O as the coordinate origin, adjust the A frame base so that pin end a″6 approaches the coordinates Y and Z of pin end a′3, and pin end b″7 approaches the coordinates Y and Z of pin end b′5.

[0062] Further, according to the position of laser tracker III (third laser tracker 12) in the figure, complete the spatial coordinate measurement of pin end a2, pin end a″′8, pin end b4, pin end b″′9, and rake marker O; with point O as the coordinate origin, adjust the A frame base so that pin end a″′8 approaches the coordinates Y and Z of pin end a2, and pin end b″′9 approaches the coordinates Y and Z of pin end b4;

[0063] Furthermore, the three measurement data were transferred to a spatial coordinate system with the harrowing marker O as the origin.

[0064] Furthermore, fit the diagonal line segments ab′ and ba′ in space, and adjust them so that the length of ab′ is equal to that of ba′, thus achieving coaxiality between pin bb″ and pin b′b″′, and between pin aa″ and pin a′a″′.

[0065] Next, the base welding work will be carried out, as follows:

[0066] After assembly and positioning are completed, the base is connected to the base reinforcing elbow plate using a 7-shaped self-aligning bracket. The key point is that the 7-shaped self-aligning bracket is only welded to the base elbow plate; it only fits snugly against the deck surface without welding. Figure 3 and Figure 4 As shown, this method can monitor the deformation of the base welding in a free state, adjust the welding sequence, achieve stress release effect, and improve the overall strength and quality.

[0067] Furthermore, before welding, angle steel is used as a support, welded to the deck surface 200mm from the base, with a total of 16 supports. Magnetic clamps are used to fix the dial indicator to the angle steel support, ensuring the dial indicator contacts are in contact with and compressed against the edge of the base. The dial indicator pointer is then adjusted to the "0" position. Figure 5 As shown.

[0068] Furthermore, the welding process employs a two-person symmetrical welding method, with the welding sequence following... Figure 6 As shown, during the welding process, one person should record the dial gauge data in real time. If the deformation reaches 0.5mm, the welding position should be adjusted immediately to ensure that the final welding deformation is controlled within 0.5mm. Furthermore, the deformation during the entire welding process is free deformation, and the amount of deformation after stress release is small. This effectively reduces the risk of alignment deviation caused by stress release base deformation during the delivery and use of Frame A1, and improves product quality.

[0069] As can be seen from the above technical solutions, in the A-frame installation method provided in the above embodiments of the present invention, the hull base positioning of A-frame 1 is controlled by a laser tracker to control the levelness, and the positioning level deviation can be controlled to 0.01mm; the shaft pin alignment method adopts the laser tracker station transfer method to achieve coaxial installation without positioning gaps; the base welding adopts the 7-character self-deformation free control method, combined with the dial indicator to control the deformation trend in real time at 0.5mm, so that the base is in an unconstrained state during the welding process. Specifically, the micro deformation trend can be viewed in real time through the dial indicator, so as to adjust the welding sequence in time. The deformation amount after welding is controllable, thereby achieving high-precision installation of A-frame 1 and achieving low-stress, high-precision welding of the base.

[0070] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A method for installing an A-frame, characterized in that, include: A laser tracker was used to position the A-frame base of the hull horizontally, and the horizontal deviation of the upper surface was controlled within 0.01mm. The parallelism of the A-frame base was measured by connecting the diagonal lines of the flange bolt holes to complete the assembly and positioning of the A-frame base. Assemble the A-frame body and A-frame base into a whole, install the crossbeams in place, and pre-tighten the flange locking bolts of the A-frame support legs and A-frame base to 70% of their pre-tightening force; The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the position of the first laser tracker, and the base of frame A is adjusted with point O as the coordinate origin. The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the position of the second laser tracker, and the base of frame A is adjusted with point O as the origin of the coordinates. The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured by the third laser tracker, and the base of frame A is adjusted with point O as the coordinate origin. The three measurement data were transferred to a spatial coordinate system with the harrow marker O as the origin, and then fitted to achieve coaxiality of multiple pin shafts. After the assembly and positioning are completed, the A-frame base is connected to the A-frame base reinforcement elbow plate using a 7-shaped clamp.

2. The A-frame installation method according to claim 1, characterized in that, The A-frame base is pre-machined to complete the overall planar machining.

3. The A-frame installation method according to claim 1, characterized in that, The process involves measuring the spatial coordinates of the corresponding shaft pin end and the rake marker O using the first laser tracker, and adjusting the A-frame base with point O as the coordinate origin. Specifically: The spatial coordinates of the corresponding axle pin ends a, a', b, b', and harrow marker O are measured using the first laser tracker. With point O as the origin, the base of frame A is adjusted so that the Y and Z coordinates of axle pin ends a and a', and b and b' are consistent.

4. The A-frame installation method according to claim 3, characterized in that, The spatial coordinates of the corresponding shaft pin end and rake marker O are measured using the second laser tracker, and the base of frame A is adjusted with point O as the origin. Specifically: The spatial coordinates of the corresponding axle pin ends a′′, a′, b′′, b′, and harrow marker O are measured using the second laser tracker. With point O as the origin, the base of frame A is adjusted so that the Y and Z coordinates of axle pin ends a′′ approach those of a′, and the Y and Z coordinates of axle pin ends b′′ approach those of b′.

5. The A-frame installation method according to claim 4, characterized in that, The spatial coordinates of the corresponding shaft pin end and the rake marker O are measured using the third laser tracker, and the base of frame A is adjusted with point O as the coordinate origin. Specifically: The spatial coordinates of the corresponding pin ends a, a′′′, b, b′′′, and harrow marker O are measured using the third laser tracker. With point O as the origin, the base of frame A is adjusted so that pin ends a′′′ approach the Y and Z coordinates of pin ends a, and pin ends b′′′ approach the Y and Z coordinates of pin ends b.

6. The A-frame installation method according to claim 5, characterized in that, The process involves transferring the three measurement data to a spatial coordinate system with the harrow marker O as the origin, and then fitting the data to achieve coaxiality of multiple pin shafts. Specifically: The three measurement data were transferred to a spatial coordinate system with the harrowing marker O as the origin. Fit the diagonal line segments ab′ and ba′ in space, and adjust ab′ to be equal to ba′, so that the pins bb′′ and b′b′′′, and aa′′ and a′a′′′ are coaxial.

7. The A-frame installation method according to claim 6, characterized in that, The 7-shaped caliper is welded only to the elbow plate of the A-frame base and is in close contact with the deck surface.

8. The A-frame installation method according to claim 7, characterized in that, Before welding the 7-shaped dial indicator to the elbow plate of the A-frame base, angle steel is used as a support and welded to the deck surface 200mm away from the A-frame base. A total of 16 angle steels are arranged. The dial indicator is fixed to the angle steel support using a magnetic clamp. The dial indicator contact is in contact with the edge of the A-frame base and is compressed.

9. The A-frame installation method according to claim 8, characterized in that, During the welding process, a two-person symmetrical welding method is adopted, and the dial gauge data is recorded in real time during the welding process, so that the final welding deformation is controlled within 0.5mm.

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