CN108974250B - A method for controlling the positioning and installation accuracy of the special equipment base on the general section - Google Patents

Abstract

The invention discloses a method for controlling the positioning and mounting precision of a special equipment base on a block, which mainly adopts a reverse deformation technology to control the mounting precision of the special equipment base and mainly comprises reverse deformation control of the special equipment base mounted on a ship block, reverse deformation control carried on the ship block and reverse deformation control of equipment base panel processing. The invention ensures the installation precision by controlling the staged reverse deformation in the building process, can offset the influence of the hull deformation generated in the carrying process of the total section, the hull deformation generated in the processing process of the equipment base plane and the hull deformation on the base installation precision in the whole building process of the ship, ensures the controlled deformation of the hull structure, improves the precision control level of the base positioning installation, and the actual application of the process technology can be implemented as long as the process technology has the conventional ship building capability.

Description

A method for controlling the positioning and installation accuracy of the special equipment base on the general section

technical field

The invention relates to the technical field of ship construction, in particular to a method for controlling the positioning and installation accuracy of a special equipment base on a general section.

Background technique

In recent years, with the development of modern shipbuilding technology, in order to meet the development needs of the modern shipbuilding model, the research on the integrated construction technology of the main section of the ship has been promoted. Guided by the lean production theory, carry out research on the positioning and installation technology of the general section of the special equipment base, break through the key technology of the positioning and installation of the general section of the special equipment base, and form the guidance document for the positioning and installation of the general section of the special equipment base to meet the requirements of the general section of the ship. Integrate the needs of construction, improve the pre-outfitting rate of the total section, shorten the construction period of the slipway, and improve the efficiency of ship construction.

The positioning and installation of the special equipment base in the general section is to advance the construction nodes that are positioned and installed after the main hull in the traditional construction process. And the precision control of hull construction puts forward higher requirements. On the one hand, the construction process and precision control of the construction of the general section should be able to meet the requirements of the positioning and installation precision control of the special equipment base;

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to design a method for controlling the positioning and installation accuracy of the special equipment base on the general section.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A method for controlling the positioning and installation accuracy of a special equipment base on a general section, specifically comprising the following steps:

Step 1: Set the horizontal deformation d of the base plane when the special equipment base is installed, the horizontal deformation e of the equipment base plane when the total section is mounted, and the horizontal deformation c of the equipment base panel when the hull is launched at a normal displacement;

Step 2: Install the special equipment base to the general hull section;

Specifically, first, determine the installation reference of the special equipment base; then, hoist the special equipment base to the target position according to the installation reference, and adjust the equipment base so that the horizontal bow direction of the base plane is adjusted to the set horizontal deformation amount d. The horizontal level is adjusted to 0°, and the cutting allowance line is drawn on the base plane to obtain the cutting allowance; finally, the special equipment base is symmetrically welded and fixed;

Step 3: Load the overall hull section onto the slipway;

Specifically, the general hull section is hoisted onto the slipway, and the horizontal state of the general hull section is adjusted so that the longitudinal level of the equipment base is within the range of [e-1′, e+1′]; welding fixed;

Step 4: Calibrate the centerline of the hull; mark the 0º, 90º, 180º, 270º scale lines on the base panel of the equipment, use the quadrant as the longitudinal adjustment benchmark, and use the torus milling machine to process the base plane, Adjust the vertical levelness of the base plane to c and the horizontal levelness to 0°; after the processing is completed, the vertical level value and the horizontal level value of the base plane are detected.

Preferably, after cutting the allowance for the base plane of the special equipment base in the step 2, the cutting surface needs to be polished to remove the cutting burrs, and the installation position of the equipment base and the horizontal level of the base plane need to be polished. Re-measure the degree and vertical level, and control the installation accuracy deviation not more than 1mm, and the deviation between the horizontal level and vertical level is not more than 1′; after the re-measurement is completed, the special equipment base is welded and fixed.

Preferably, the specific steps of determining the installation reference of the special equipment base in the step 2 are:

Set up the laser theodolite to the target position, level the laser theodolite based on the geodetic level, and use the laser theodolite to mark the center of the total section on the deck of the general section of the hull by combining the hull structure line and the actual positioning center line carried on the slipway of the general section. The center line of the total section is used as the longitudinal reference line for the installation of the equipment base; the ground level is used as the horizontal reference plane for the installation of the equipment base; the rib line drawn during the overall grouping of the total section is used as the equipment. Lateral reference line for pedestal mounting.

Preferably, the specific steps of hoisting the special equipment base to the target position according to the installation reference in the step 2 are:

First, hoist the equipment base to the target position of the general section of the hull, so that the longitudinal engraved line of the cross line delineated in advance on the installation part of the equipment base coincides with the center line of the general section, and the horizontal engraved line is aligned with the corresponding rib line. ;

Then, use the laser theodolite to detect whether the equipment base is hoisted in place. If it meets the specified requirements, adjust the height of the upper plane of the base from the deck of the general hull section and the levelness of the upper plane of the base, so that the horizontal bow direction of the base plane can be adjusted. To the set horizontal deformation amount d, the horizontal horizontality is adjusted to 0°.

Preferably, the horizontal deformation of the special equipment base is d=a+c, where a is the horizontal deformation of the equipment base plane after the entire section is assembled to the main hull structure, and b is when the total section is mounted The longitudinal horizontality deformation of the equipment base plane, c is the horizontal deformation of the equipment base panel when the equipment base is at a normal displacement after the plane is processed and the hull is launched.

Preferably, after the overall hull section is fixed by girth welding in the step 3, measure whether the longitudinal level of the equipment base on the overall hull section is within the range of [d-1', d+1'], if it meets the requirements , then go to step 4.

Preferably, the horizontal deformation of the equipment base plane when the total section is mounted is e=a+b+c, wherein a is the horizontal deformation of the equipment base plane after the total section is assembled to the main hull structure is complete, b is the longitudinal horizontality deformation of the equipment base plane when the total section is mounted, and c is the horizontal deformation of the equipment base panel when the equipment base is at a normal displacement after the plane is processed and the hull is launched.

Positive beneficial effects of the present invention:

1. The installation precision control method of the present invention has high controllability. Through analysis and research, the precision control of the special equipment base on board installation is divided into three stages for control, which facilitates the adjustment of the control precision and ensures that the installation of the base before the stage is completed. The positioning and installation accuracy of the shift. Compared with the prior art, the forward movement of the positioning and installation nodes of the special equipment base is realized, the pre-outfitting rate of the total section is effectively improved, the construction period of the slipway is shortened, and the ship construction efficiency is improved.

2. The method of the present invention ensures the installation accuracy by controlling the anti-deformation in stages during the construction process, and can offset the deformation of the hull generated during the loading process of the total section, the deformation of the hull caused by the plane processing of the equipment base, and the influence of the deformation of the hull during the entire construction process of the ship. The influence of the installation accuracy of the base ensures that the deformation of the hull structure is controlled, and the precision control level of the positioning and installation of the base is improved. The actual application of this process technology does not require special equipment and technology, as long as it has the ability to build conventional ships.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a process flow diagram of the installation precision control of the present invention.

Figure 2 is the positioning diagram of the special equipment base of a certain type of ship.

Figure 3 is a schematic diagram of the installation surface of the special equipment base of a certain type of ship.

The specific meanings of the numbers in the figure are: 1 is deck 1, and 2 is deck 01.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described below through the specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

The method for controlling the positioning and installation accuracy of the special equipment base on the general section of the present invention mainly adopts the anti-deformation technology to control the installation accuracy of the special equipment base, and mainly includes the anti-deformation control of the special equipment base installed on the general section of the hull. , The anti-deformation control for the overall hull section, and the anti-deformation control for the processing of the equipment base panel.

The anti-deformation control of the special equipment base installed on the overall section of the hull is mainly used to offset the influence of the deformation of the hull on the installation accuracy of the base during the ship building process. Through the analysis of the hull precision control in the whole process of ship construction, combined with the installation characteristics and requirements of the special equipment base, the horizontal deformation of the special equipment base plane during the positioning and installation of the total section is summarized and determined, and the equipment base is determined according to the horizontal deformation value. Make adjustments to avoid horizontal deformation deviations, reduce the accumulation of deviations in the entire installation and positioning process, and improve the precision control level of the positioning and installation of the equipment base.

The anti-deformation control carried by the overall hull section is mainly used to offset the influence of the deformation generated during the hull carrying process on the installation accuracy of the base. According to the carrying plan of the total hull section, according to the hull construction accuracy control requirements put forward in the "Surface Ship Hull Construction Accuracy Requirements", CBT4000-2005 "China Shipbuilding Quality Standard" and other standards and specifications, through the accuracy control of each link of the total section construction Comprehensive analysis with data collection, combined with the actual situation of the construction of the total section, the accuracy of welding deformation, cutting accuracy, plate scribing, anti-deformation value, reference line (surface) determination, lifting ring and structural strengthening settings, total section loading and other aspects. The control requirements are analyzed, and the research summary determines the position offset of the total section when it is loaded. According to the offset, the horizontal state of the total section is adjusted to offset the influence of the deformation generated during the loading process on the installation accuracy of the base and ensure the hull. Structural deformation is controlled.

The anti-deformation control of the equipment base panel processing is mainly used to offset the influence of the deformation of the hull on the installation accuracy of the base during the plane processing of the base. According to the relevant requirements for the positioning and installation of the special equipment base in the "Surface Ship Hull Construction Accuracy Requirements", CBT4000-2005 "China Shipbuilding Quality Standard" and other standards and specifications, and combined with the shipping technical conditions of the ship equipment system, the special equipment base is clarified. The deviation requirements of the precision control when the base is installed and submitted for inspection after the main hull structure is complete, and the deformation of the actual base panel processing is studied to determine the panel deformation amount during the processing of the equipment base.

The method of controlling the positioning and installation accuracy of the special equipment base on the general section of the present invention will be specifically described below with reference to FIG. 1 , taking a certain type of ship series as an example. The method specifically includes the following steps:

Step 1: Set the horizontal deformation d of the base plane when the special equipment base is installed, the horizontal deformation e of the equipment base plane when the total section is mounted, and the horizontal deformation c of the equipment base panel when the hull is launched at a normal displacement.

The horizontal deformation amount of the special equipment base d=a+c, where a is the longitudinal level deformation of the equipment base plane after the total section from the main group to the main hull structure is complete, and b is the equipment base when the total section is mounted The longitudinal levelness deformation of the plane, c is the longitudinal levelness deformation of the equipment base panel after the plane is processed and the hull is launched to the normal displacement.

The horizontal deformation amount e=a+b+c of the equipment base plane when the total segment is mounted.

Longitudinal levelness deformation of the equipment base plane from the main section to the main hull structure after the structure is complete The horizontality deformation c is based on the measurement, statistics and analysis of the hull baseline deflection and the horizontal auxiliary detection benchmark, comprehensively considering the construction technology and construction process of the general section, and the research summary of the change in the horizontal state after the general section and the main hull structure are complete. determined.

Step 2: Mount the special equipment base to the overall hull section.

First, determine the installation datum of the special equipment base, which includes the center line of the total section, the horizontal reference plane and the transverse reference line.

The specific steps to determine the installation reference of the special equipment base are as follows:

Calibration of the center line of the total section: set up the laser theodolite to the target position, and level the laser theodolite based on the geodetic level. When leveling, the composite water bubble is required to be displayed in any direction, confirming that the theodolite is at the geodetic level; The actual positioning centerline carried on the slipway of the section, use the laser theodolite to draw the centerline of the total section on deck 1 of the total hull section, and mark it with ocean stamping. After the centerline of the total section is marked and accepted, the centerline of the total section As a longitudinal reference line for the installation of the equipment base;

The ground level is used as the horizontal reference plane for the installation of the equipment base. During the actual installation of the equipment base, appropriate adjustments are made according to the actual construction control accuracy of the general section and the flatness and inclination of the general section deck;

The rib line drawn during the overall grouping of the total section is used as the lateral reference line for the installation of the equipment base. During the actual installation of the equipment base, appropriate adjustments are made according to the actual hull structure of the total section.

Then, the construction status of the base positioning and installation position is determined, the general section is completed, the hull pyrotechnic calibration near the base is basically completed, and the base positioning and installation datum (center line, horizontal state) is calibrated. Hoist to the target position of the hull general section (FZ01 general section), so that the longitudinal engraved line of the cross line delineated in advance on the installation part of the equipment base coincides with the center line of the general section, and the horizontal engraved line is aligned with the corresponding rib line; Use a laser theodolite to detect whether the equipment base is hoisted in place at the set detection point (that is, to detect whether the longitudinal engraved line of the cross line is coincident with the center line of the total section, and whether the horizontal engraved line is aligned with the rib line at the installation position), If it meets the specified requirements, adjust the height of the upper plane of the base from the deck of the general hull section, and the levelness of the upper plane of the base, so that the horizontal bow direction of the base plane is adjusted to the set horizontal deformation d (that is, the base plane The vertical level is adjusted to d), and the horizontal level is adjusted to 0°. After the equipment base is adjusted in place, mark the cutting allowance line on the base plane and cut the allowance. After the margin cutting, grind the cutting surface to remove the cutting burrs, and then re-measure the installation position of the equipment base and the horizontal and vertical levelness of the base plane, and control the deviation of the installation accuracy to not exceed 1mm, and the horizontal levelness The deviation from the longitudinal level shall not exceed 1′, and temporary stop and fixation shall be made; after the retest is completed, use a qualified welding machine, use appropriate welding materials, and use appropriate current. According to the process requirements, the special equipment base should be welded and fixed, the spot welding should be symmetrical and uniform, the welding deformation should be controlled, and the relevant data should be re-measured after the spot welding, and the data should be recorded.

After the welding is finished, after it is completely cooled, the temporary support in the base is cut off, the burrs of grinding and cutting are cleaned, and the quality department is reported to the quality department after the self-inspection.

Step 3: Load the total hull section onto the slipway.

Specifically, hoist the overall hull section to the slipway, and when the hoisting is in place, measure the longitudinal level value of the special equipment base that has been positioned and installed on the overall section, and use the three-position adjustment tool to adjust the horizontal state of the overall hull section so that the equipment base The longitudinal level of the seat is within the range of [e-1′, e+1′]; then, the general hull section is fixed by girth welding. After the general hull section is fixed by girth welding, measure whether the longitudinal level of the equipment base that has been positioned and installed on the general hull section is within the range of [d-1′, d+1′]. If the requirements are met, the next process can be implemented , if it exceeds the above range, the vertical level of the base can be fine-tuned during the processing of the base plane.

Step 4: Calibrate the centerline of the hull. When calibrating the centerline of the hull, the base line of the slipway, the centerline of the general section and the centerline of the special equipment base should be combined, and the centerline of the hull should be marked on deck 1 and deck 01 with a laser theodolite. Corresponding ocean impact points, and install the centerline marking board at the corresponding position according to the hull centerline marking board layout and installation diagram. After the hull centerline on deck 1 and 01 is marked, this centerline is used as the only centerline datum of the whole ship . After the calibration of the hull centerline is completed, one point is set at the front and rear of the equipment base as a check point for the re-measurement of the hull centerline by erecting theodolites, and the hull centerline is remeasured. After the hull centerline has passed the acceptance, the centerline shall be used as the adjustment benchmark for the longitudinal horizontal value during the processing of the base plane.

When processing the base panel of the equipment, use the reference inspection platform as the horizontal alignment reference.

Then, according to factors such as the longitudinal position, the distance from the middle, the height of the base, the inner and outer circle allowance of the base panel, the thickness allowance, the horizontal value of the base, etc., draw 0º, 90º, 180º, 270º scale lines on the base panel of the equipment , with the help of the quadrant, taking the center line of the hull as the longitudinal adjustment benchmark, and using the toroidal milling machine to process the base plane, adjust the longitudinal level of the base plane to c, and adjust the horizontal level to 0°; after the processing is completed, use The electronic level or quadrant is used to test the vertical and horizontal values of the base plane. The parallelism value should meet the requirements of the corresponding indicators, and the inspector records the test data.

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 preferred embodiments, those of ordinary skill in the art should understand; The specific embodiments of the invention are modified or some technical features are equivalently replaced; without departing from the spirit of the technical solutions of the present invention, all of them should be included in the scope of the technical solutions claimed in the present invention.

Claims (7)

1. A method for controlling the positioning and mounting accuracy of a special equipment base on a block is characterized by comprising the following steps:

step 1: setting the horizontal deformation d of the base plane when the special equipment base is installed, the horizontal deformation e of the equipment base plane when the block is carried, and the horizontal deformation c of the equipment base panel when the hull launching is at the normal displacement;

step 2: mounting a special equipment base on the ship body block;

specifically, firstly, determining an installation reference of a special equipment base; then, hoisting the special equipment base to a target position according to an installation reference, adjusting the equipment base to enable the horizontal bow direction of the base plane to be adjusted to a set horizontal deformation d and the horizontal levelness to be adjusted to 0 degree, and marking a cutting allowance line and a cutting allowance on the base plane; finally, symmetrically welding and fixing the special equipment base;

and step 3: carrying the hull block on a slipway;

specifically, the hull block is hoisted to a slipway, and the horizontal state of the hull block is adjusted to ensure that the longitudinal levelness of the equipment base is in the range of [ e-1 ', e + 1' ]; then, performing girth welding and fixing on the hull block;

and 4, step 4: calibrating a central line of a ship body, marking scale lines of 0 degree, 90 degrees, 180 degrees and 270 degrees on a base panel of the equipment, processing a base plane by using a ring surface milling machine by taking the central line of the ship body as a longitudinal adjusting reference by means of a quadrant instrument, and adjusting the longitudinal levelness of the base plane to be c and the transverse levelness to be 0 degree; and after the processing is finished, detecting the longitudinal horizontal value and the transverse horizontal value of the base plane.

2. The method for controlling the positioning and mounting accuracy of the special equipment base on the total section as claimed in claim 1, wherein after cutting allowance on the base plane of the special equipment base in the step 2, the cutting surface is ground to remove cutting burrs, the mounting position of the equipment base and the transverse levelness and the longitudinal levelness of the base plane are retested, the deviation of the mounting accuracy is controlled to be not more than 1mm, and the deviation of the transverse levelness and the longitudinal levelness is controlled to be not more than 1'; and after the retest is finished, welding and fixing the special equipment base.

3. The method for controlling the positioning and installation accuracy of the special equipment base on the total section according to claim 1, wherein the specific step of determining the installation reference of the special equipment base in the step 2 is as follows:

erecting a laser theodolite to a target position, leveling the laser theodolite by taking the ground level as a reference, marking a total section central line on a deck of a ship block by using the laser theodolite in combination with a ship block structure line and an actual positioning central line carried by a shipway on the total section, and marking the total section central line as a longitudinal reference line for mounting an equipment base by using ocean stamp;

taking the ground level as a horizontal reference surface for mounting the equipment base;

and taking a rib position line marked out when the total assembly of the total section is carried out as a transverse datum line for mounting the equipment base.

4. The method for controlling the positioning and mounting accuracy of the special equipment base on the total section according to claim 3, wherein the specific steps of hoisting the special equipment base to the target position according to the mounting reference in the step 2 are as follows:

firstly, hoisting an equipment base to a target position of a ship body total section, so that a longitudinal scribed line of a cross line scribed in advance on an installation part of the equipment base coincides with the central line of the total section, and a transverse scribed line is aligned with a corresponding rib position line;

then, whether the equipment base is hoisted in place is detected by using the laser theodolite, if the equipment base meets the specified requirements, the height between the upper plane of the base and the deck of the ship block and the levelness of the upper plane of the base are adjusted, and the horizontal bow direction of the plane of the base is adjusted to the set horizontal deformation d and the horizontal levelness is adjusted to be 0 degree.

5. The method for controlling the positioning and installation accuracy of the special equipment base on the general section according to claim 1 or 4, wherein the horizontal deformation d = a + c of the special equipment base, wherein a is the horizontal deformation of the general section to the plane of the equipment base after the main hull structure is complete, and c is the horizontal deformation of the equipment base panel from the plane processing of the equipment base to the time when the hull launching water is at the normal displacement.

6. The method for controlling the positioning and mounting accuracy of the special equipment base on the block according to claim 1, wherein after the block of the hull is fixed by girth welding in the step 3, whether the longitudinal levelness of the equipment base on the block of the hull is within the range of [ d-1 ', d + 1' ] is measured, and if the requirement is met, the step 4 is executed.

7. The method for controlling the positioning and mounting accuracy of the special equipment base on the total section according to claim 1, wherein the horizontal deformation e = a + b + c of the equipment base plane when the total section is carried, wherein a is the horizontal deformation of the total section to the equipment base plane after the main hull structure is complete, b is the longitudinal horizontal deformation of the equipment base plane when the total section is carried, and c is the horizontal deformation of the equipment base panel when the launching water of the hull is at the normal drainage after the equipment base is processed on the plane.

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