CN111591409A - Process method for improving forward reverse propelling precision of construction process - Google Patents
Process method for improving forward reverse propelling precision of construction process Download PDFInfo
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- CN111591409A CN111591409A CN202010422183.1A CN202010422183A CN111591409A CN 111591409 A CN111591409 A CN 111591409A CN 202010422183 A CN202010422183 A CN 202010422183A CN 111591409 A CN111591409 A CN 111591409A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
Abstract
The invention relates to a process construction method for improving forward reverse propulsion precision of a construction process, and belongs to the technical field of ship construction. In order to change the current traditional shipbuilding method, the influence of the error accumulation of the current ship body on the work of the turbine in the later period is changed, the working procedure in the building process is moved forward to participate in the ship body folding process, and the process control and tracking are strict at the same time, so that the smoothness and the safe operability of the turbine installation work are ensured; the ultimate goal is to shorten the ship construction cycle, thereby maximizing profits.
Description
Technical Field
The invention relates to a process construction method for improving forward reverse propulsion precision of a construction process, and belongs to the technical field of ship construction.
Background
In the prior art, as the cost of building materials, equipment, human resources and the like is increased continuously, the profit margin is compressed continuously according to the traditional shipbuilding method. At present, the domestic shipbuilding methods are that before the shafting alignment is carried out according to the requirement of 8.1.2.2 in the ' Chinese shipbuilding quality standard ', all hull structures and bases of the front wall of an engine room, a main deck or a powerful continuous deck, are welded and corrected, a stern shaft tube is welded according to the center line of a hull qualified by inspection, and after the tightness test of the stern shaft tube, a cooling water tank and a double-layer bottom cabin is finished ', the shafting alignment is carried out after the total assembly and segmentation of the engine room is finished; the ship body, namely the formed base layer is provided with a wheel machine device, in particular to a stay wire lighting positioning stern tube.
Based on the current ship construction quality standard, the method is lower: the deviation and distortion of the segment closure (the hull standard is standard less than 10mm, the limit is 20 mm) are positioned by assembling the plates on the segment jig (the hull standard is standard less than 5mm, and the limit is 15 mm).
The accumulated error in the shipbuilding forward process is usually remedied by a shafting of a turbine and an outfitting rudder system, and the following conditions are mainly adopted:
1. the turbine is located forward from the rear end point of the stern post in a frame formed by a ship cabin, and the epoxy thickness allowance of the stern tube is used for (remedying).
2. The problem of rib deviation of a ship body side reinforcing plate of a top supporting plate of a main machine of the turbine.
3. The existing scheme is that the purchased steel casting allowance diameter is 20mm for remedying, and when the ship body is twisted greatly, one side of the ship body is bored by 15mm, and the other side of the ship body is symmetrical and only has the diameter of 5mm, the situation occurs.
4. If the stern column section 101 and the cabin total group (201 &211PS &221 PS) are folded and twisted, the stern tube epoxy is locally thick, and objective thickness unevenness exists in the stern tube epoxy.
5. When the middle group 102PCS is folded into the cabin total section, the problems of ship bodies such as contraction of a bevel of a folding opening, barycentric stability in the welding process and the like all have the possibility of causing the actual rudder system to deviate from the theoretical central line.
6. Some ships are provided with efficient rudders, rudder sleeves of the efficient rudders need to be welded in place in a subsection stage in advance, and once the rudder sleeves are welded and formed, the rudder sleeves cannot move well. After the assembly, if the closure precision of the ship body is not good, (namely when a thick stay wire is used, the intersection degree of the shaft rudder system is found not to meet the standard), the rudder system can not be bored for remediation, and the adjustable space is very small at the moment, namely, only the epoxy thickness allowance of the stern tube is used for remediation.
In the process of shipbuilding, many times, the selection is not the question, and sometimes the left side is right and the right side is also right. The pictographic points are as follows: errors are accumulated, overlapped and mutually offset, so that a single department is difficult to accurately master the accurate direction in many times, the turbo-machine personnel participate in the operation in advance, and the influence of accumulated and overlapped errors in hull construction on the later-stage turbine operation is corrected and reduced in time, which is necessary; on the small aspect, the boring allowance on the shaft rudder system ship body steel casting is reduced, and the top supporting ship body rib plate of the main machine is ensured not to be cut and welded; on the large aspect, the actual linear flow of the ship body has no break angle, so that the propulsion efficiency of the ship is improved; and meanwhile, when the vehicle is navigated directionally, the autopilot reduces the work correction.
Therefore, in order to change the current situation, it is urgent to develop an improved shipbuilding method, thereby shortening the construction period, improving the accuracy, and further improving the time efficiency of the profit.
Disclosure of Invention
The invention aims to solve the problems in the background problem and provides a process method for improving the forward reverse propulsion precision of a construction process, which comprises the following steps of: and (4) taking the result as a guide, taking the turbine as a main line, and adjusting and controlling the closing precision of the ship body.
The purpose of the invention is realized as follows: a process method for improving forward reverse propelling precision of a construction process comprises the following steps:
preparation work: participate in the control of the ship body subsection blanking and folding process, supplement each other;
the method comprises the following steps: from the beginning of blanking, a responsibility department carries out self-checking and precise control to carry out secondary inspection and record;
step two: splicing the structural components, drawing lines on the boards, performing primary inspection and secondary inspection;
step three: a welding laboratory participates and researches, gradually improves data after sectional molding, and assists in precise control;
step four: the segment of the base where the host is located is 201 segments, in the main scale report of the 201 segments, segment central lines are marked in the host pit in front and at the back, and 2-level inspection records are recorded
Step five: 201, carrying a site in a subsection mode, checking and adjusting the central line of the subsection and the folding line to be on the same longitudinal section by a related responsible party according to a determined ship central line of the carrying site;
step six: erecting a stem marker by a related responsible party according to the marking points of the pits of the main machine hull base, marking, and carrying out 2-level inspection record;
step seven: determining the position of a foundation bolt hole of a first host according to a stem, and opening a hole;
step eight: according to the position of a host foundation bolt hole of a host installation drawing, opening the positions of a host foundation bolt hole and a host oil return opening;
step nine: erecting an auxiliary mark post at the rib position Fr13 at the rear part of the segment 201 by taking the first foundation bolt as a reference;
step ten: the 211PS and the 212PS are carried on the 201 segments, and the central lines and the folding lines of the segments 211PS and the 212PS are ensured to be on the same longitudinal section;
step eleven: folding 101 segments onto the total group segment: firstly, the sectional central line and the folding line are on the same longitudinal section, and the distance from a stern steel casting to an auxiliary light target is ensured;
step twelve: positioning the position of the combined stern tube by using the determined reference;
step thirteen: advancing the main engine, and transferring the reference of the positioning stern tube to an auxiliary reference Fr 13;
fourteen steps: the front cover and the rear cover of the crankshaft are opened, and the stern tube is positioned by shining from front to back and passing through the center of the crankshaft to back.
And the tenth step and the eleventh step are both accurately adjusted by using adjustable sectional support frames.
The adjustable segmented support frame is of a hydraulic cylinder type.
In the twelfth step, the distance between the rear end face of the stern tube and the first foundation bolt is 13416-13424 mm from the stern of the main engine and the first bolt.
In the thirteenth step, the distance between the rear flange surface of the stern tube and the auxiliary light target L5=5857 +/-1 mm.
In the fourteenth step, a through hole is formed in the center of the crankshaft.
Compared with the prior art, the process method for improving the forward reverse propelling precision of the construction process has the following advantages:
1. the requirement of the intersection degree of a shafting and a rudder system is met;
2. compared with the traditional shipbuilding method, the allowance of boring holes of rudder system steel castings is reduced;
3. the risk that the epoxy thickness of the stern tube is locally too thin is reduced;
4. "remedial measures" to the ribs that reduce the top support of the host machine;
5. the middle bearing can be welded in advance;
6. the main machine can be hung into the engine room after the wire is pulled roughly;
7. finishing the temporary large opening of the top plate of the cabin structure in advance, and reducing the influence on the elastic deformation and the plastic deformation of the ship body;
8. a temporary cover plate of the main deck is cancelled;
9. the upper building and the chimney can be carried in advance, and finally the whole building period is shortened.
The conventional forward exploration of the ship construction process mainly aims at improving the pre-outfitting rate on a hull structure which is formed, vividly speaking, the ship is old, how to reduce the turnover rate of a dock/shipway stage, improve the pre-outfitting rate of a section and a total section and expand the total section percent, and reduce the damage and pollution degree of later-stage outfitting operation on paint, such as PSPC (coating protection) and other research works; the process engineering method provided by the invention has the advantages that the research is continuously and forwardly carried out, the control of the blanking and folding processes of the engine room sections closely related to the turbine is actively participated, the process engineering method is complementary with the ship body, the installation requirement of the turbine is met while the requirement of the ship body is met, and the workload of boring, cutting, borrowing and supplementing in the later period is reduced.
The invention changes the traditional ship building method at present, changes the influence of the error accumulation of the prior ship body on the work of the turbine at the later stage, ensures the smooth and safe operability of the installation work of the turbine by leading the working procedure to advance to participate in the closing process of the ship body and strictly controlling and tracking the process, and finally aims to shorten the ship building period and ensure the maximum profit.
Drawings
FIG. 1 is a line illumination diagram of the shafting rudder system of the present invention.
FIG. 2 is a side view of a line illumination chart of the shafting rudder system of the present invention.
Fig. 3 is a detailed structure diagram of the center of the first bolt hole of the main frame base according to the present invention.
Fig. 4 is a drawing line lighting diagram after the closure of the main hull is finished.
Fig. 5 is a side sectional left half view of a hull of the present invention.
Fig. 6 is a right half view of a hull side view in section according to the present invention.
Fig. 7 is a sectioned left half view of a double bottom of a hull according to the present invention.
Fig. 8 is a right half view of the hull upper deck section in the present invention.
Fig. 9 is a sectional view of the hull of the present invention at platform one.
Fig. 10 is a sectional view of the hull of the present invention at platform two.
Fig. 11 is a sectional division view at a reference FR39 of the hull of the present invention.
Fig. 12 is a sectional division view at a reference FR10 of the hull of the present invention.
Fig. 13 is a sectional view of the stern of the hull of the present invention.
Wherein: 1. a main chassis panel; 2. the center of a first bolt hole of the host base; 3. a middle bearing centerline; 4. a light target B; 5. the end surface of a main engine flywheel flange; 6. a light target A; 7. a light target C; 8. a light target D; 9. a light target E; 10. a stern post; 11. a rudder system central line; 12. a middle bearing centerline; 13. a first platform; 14. platform II; 15. and (4) an upper deck.
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1 to 13, a process method for improving forward reverse propulsion precision of a construction process is characterized in that: the method comprises the following steps:
preparation work: participate in the control of the ship body subsection blanking and folding process, supplement each other;
the method comprises the following steps: from the beginning of blanking, a responsibility department firstly carries out self-checking and precise control to carry out secondary inspection and record (internal control);
step two: splicing the structural components, firstly drawing lines on the plates, carrying out primary inspection and secondary inspection (internal control);
step three: a welding laboratory participates and researches, gradually improves data after sectional forming, and assists in precise control (internal control);
step four: the main engine hull base is arranged on the 201 segment and belongs to one part of the segment, in the main scale report of the 201 segment, segment central line marks (sample punching) are made in the main engine pit in front and at the back, and 2-level inspection records are recorded;
step five: the segment 201 is arranged on a carrying site, and a related responsible party checks and adjusts the central line of the segment and a folding line to be on the same longitudinal section according to a determined ship central line of the carrying site;
step six: erecting a stem marker by a related responsible party according to the marking points of the pits of the main machine hull base, marking, and carrying out 2-level inspection record;
step seven: determining the position of a foundation bolt hole of a first host according to a stem, and opening a hole;
step eight: according to the position of a host foundation bolt hole of a host installation drawing, opening the positions of a host foundation bolt hole and a host oil return opening;
step nine: erecting an auxiliary mark post at the rib position Fr13 at the rear part of the segment 201 by taking the first foundation bolt as a reference;
step ten: the 211PS and the 212PS are carried on the 201 segments, the central lines and the folding lines of the segments 211PS and 212PS are ensured to be on the same longitudinal section, and the adjustable segmented support frame is necessary to be used for accurate adjustment;
step eleven: folding 101 the segments to the total assembly segment, firstly, enabling the segment central line and the folding line to be on the same longitudinal section, then ensuring the distance from the stern steel casting to the auxiliary light target, and needing to accurately adjust by using an adjustable segmented support frame;
step twelve: positioning the combined stern tube by using the determined reference: the distance between the rear end surface of the stern tube and the first foundation bolt is 13421 mm from the stern of the first foundation bolt of the main engine;
step thirteen: advancing the main engine, transferring the reference of the positioning stern tube to an auxiliary reference Fr13, and enabling the distance between the rear flange surface of the stern tube and an auxiliary light target L5=5857 +/-1 mm;
fourteen steps: the front cover and the rear cover of the crankshaft are opened, the stern tube is positioned by shining from front to back and passing through the center of the crankshaft to back, and finally the construction period is shortened while the precision is ensured (the rib alignment position of the top support of the main machine machinery is improved);
in this embodiment, the above-mentioned steps ten and eleven are precisely adjusted by using an adjustable sectional support frame, and the adjustable sectional support frame is of a hydraulic cylinder type.
In the present embodiment, in the fourteenth step, the through hole is provided in the center of the crankshaft.
In this embodiment, the steps may be used to define a benchmark ahead of time, and process control and tracking may be performed based on the benchmark.
In this embodiment, after the step 14, a through hole is formed in the center of the crankshaft of the host manufacturer, so that technical conditions of penetrating the stern shaft in advance and press-fitting the propeller can be achieved on the basis of a powerful continuous cabin lower platform given by the overall structure in the future.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (6)
1. A process method for improving forward reverse propelling precision of a construction process is characterized in that: the method comprises the following steps:
preparation work: participate in the control of the ship body subsection blanking and folding process, supplement each other and act as a scale;
the method comprises the following steps: from the beginning of blanking, a responsibility department carries out self-checking and precise control to carry out secondary inspection and record;
step two: splicing the structural components, drawing lines on the boards, performing primary inspection and secondary inspection;
step three: a welding laboratory participates and researches, gradually improves data after sectional molding, and assists in precise control;
step four: determining that the section of the base where the host is located is 201 sections, marking front and back section center lines in a host pit in a main scale report of the 201 sections, and performing level-2 inspection record;
step five: 201, carrying a site in a subsection mode, checking and adjusting the central line of the subsection and the folding line to be on the same longitudinal section by a related responsible party according to a determined ship central line of the carrying site;
step six: erecting a stem marker by a related responsible party according to the marking points of the pits of the main machine hull base, marking, and carrying out 2-level inspection record;
step seven: determining the position of a foundation bolt hole of a first host according to a stem, and opening a hole;
step eight: according to the position of a host foundation bolt hole of a host installation drawing, opening the positions of a host foundation bolt hole and a host oil return opening;
step nine: erecting an auxiliary mark post at the rib position Fr13 at the rear part of the segment 201 by taking the first foundation bolt as a reference;
step ten: the 211PS and the 212PS are carried on the 201 segments, and the central lines and the folding lines of the segments 211PS and the 212PS are ensured to be on the same longitudinal section;
step eleven: folding 101 segments onto the total group segment: firstly, the sectional central line and the folding line are on the same longitudinal section, and the distance from a stern steel casting to an auxiliary light target is ensured;
step twelve: positioning the position of the combined stern tube by using the determined reference;
step thirteen: advancing the main engine, and transferring the reference of the positioning stern tube to an auxiliary reference Fr 13;
fourteen steps: the front cover and the rear cover of the crankshaft are opened, and the stern tube is positioned by shining from front to back and passing through the center of the crankshaft to back.
2. The process method for improving the forward reverse propelling precision of the construction process according to claim 1, which is characterized in that: and the tenth step and the eleventh step are both accurately adjusted by using adjustable sectional support frames.
3. The process method for improving the forward reverse propelling precision of the construction process according to claim 2, wherein the process method comprises the following steps: the adjustable segmented support frame is of a hydraulic cylinder type.
4. The process method for improving the forward reverse propelling precision of the construction process according to claim 1, which is characterized in that: in the twelfth step, the distance between the rear end face of the stern tube and the first foundation bolt is 13416-13424 mm from the stern of the main engine and the first bolt.
5. The process method for improving the forward reverse propelling precision of the construction process according to claim 1, which is characterized in that: in the thirteenth step, the distance between the rear flange surface of the stern tube and the auxiliary light target L5=5857 +/-1 mm.
6. The process method for improving the forward reverse propelling precision of the construction process according to claim 1, which is characterized in that: in the fourteenth step, a through hole is formed in the center of the crankshaft.
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