CN111717347B - Track structure of large cutter suction dredger trolley and manufacturing and mounting process - Google Patents
Track structure of large cutter suction dredger trolley and manufacturing and mounting process Download PDFInfo
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- CN111717347B CN111717347B CN202010474966.4A CN202010474966A CN111717347B CN 111717347 B CN111717347 B CN 111717347B CN 202010474966 A CN202010474966 A CN 202010474966A CN 111717347 B CN111717347 B CN 111717347B
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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
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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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
- B63B73/40—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by joining methods
- B63B73/43—Welding, e.g. laser welding
Abstract
The invention relates to the technical field of construction of cutter suction dredger, in particular to a track structure of a trolley of a large cutter suction dredger and a manufacturing and mounting process thereof. The trolley track structure is divided into three pairs of tracks including a main track, an upper side track and a lower side track, 10mm stainless steel bands are arranged on the tracks, and the manufacturing process comprises the following steps: s1, formulating basic requirements; s2, integrally assembling and welding the lower rail; s3, integrally assembling and welding the middle rail; and S4, integrally assembling and welding the upper rail. The installation process flow comprises the following steps: the method comprises the steps of track section manufacturing completion → identification of a midline plane reference → track mounting line → detection of the size of a ship track mounting part → hoisting of a track → track mounting detection → spot welding fixation → elimination of uneven gaps → rib plates and outer plates at a mounting notch → inspection recording → symmetrical welding of a track → size monitoring and recording → adjustment of welding sequence to correct welding deformation → size detection → welding of stainless steel band → inspection. The invention can improve the construction quality and efficiency, and is suitable for cutter suction dredger of various types.
Description
Technical Field
The invention relates to the technical field of construction of cutter suction dredger, in particular to a track structure of a trolley of a large cutter suction dredger and a manufacturing and mounting process thereof.
Background
Nowadays, ecological environment protection is very important all over the world, green development is promoted, outstanding environmental problems are solved, and ecological engineering construction such as ocean water area ecological restoration, ecological maintenance and ocean sewage treatment is vigorously developed. Dredging provides an important solution for port new construction, channel maintenance, island reef expansion, sea reclamation and water environment remediation. The cutter suction dredger is one of the main dredger types for dredging construction, and can be widely applied to dredging engineering due to the characteristics of high efficiency, good independence, hard excavated soil and the like. The main construction method of the cutter suction dredger is that a reamer cuts underwater soil, a dredge pump sucks a mixture of broken rock-soil materials and water, and the mixture is conveyed to a throwing area through a pipeline. The development speed of various operating systems applied to the large cutter suction dredger is accelerated as the large cutter suction dredger and the like matched with engineering are transported.
The large cutter suction dredger is a very complicated engineering ship with high technology and high added value. Because the large cutter suction dredger is special in shape, multiple in special equipment and complex in function, the cutter suction dredger with large cutter power can be internationally bent, and the cutter suction dredger designed and constructed by a company is combined with a cutter suction dredger of "Tianjing" number, the method needs to research the attack and the customs in order to realize the original import localization of key equipment and components such as a positioning steel pile trolley, a steel pile, a pile reversing system, a front-end equipment cabin part of a cutter bridge frame and the like, and meanwhile, in order to realize the industrialization target of the whole-ship construction in China, a plurality of technical difficulties exist in the aspect of the manufacturing process technology, and the construction quality, the construction efficiency and the economic benefit are improved.
In view of the above, a rail structure of a large cutter suction dredger trolley and a manufacturing and mounting process thereof are provided, which are applied to a steel pile trolley system of a large cutter suction dredger.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a track structure of a large cutter suction dredger and a manufacturing process thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a large-scale cutter suction dredger platform truck track structure which characterized in that: the trolley track structure is divided into three pairs of tracks, namely a main track (middle track), an upper side track and a lower side track, and a 10mm stainless steel strip is arranged on the tracks.
The invention discloses a process for manufacturing a trolley track of a large cutter suction dredger trolley, which comprises the following steps: s1, formulating basic requirements; s2, integrally assembling and welding the lower rail; s3, integrally assembling and welding the middle rail; and S4, integrally assembling and welding the upper rail.
Preferably, the step S1 includes the following steps: s11, welding the lower rail and the middle rail in sequence, and welding the upper rail at last; s12, completing the assembling and welding of the ship body segment before assembling and welding, and completing a ship body test as far as possible; s13, formulating a detection program; s14, respectively taking horizontal lines parallel to the central line plane at the outer plate installation positions of the upper, middle and lower tracks, taking the intersection point of each line at the rib position as a detection base point, and continuously taking three days, 7 days earlier: 00, 1 in the afternoon: 30, evening 18: 30, detecting the sizes of the base points of the 6 horizontal lines, recording the sizes, and finding out the law of the influence of the sunshine temperature difference on the deformation of the ship body; and S15, before the rail is welded at the stern, shading treatment is carried out by using color stripe cloth.
Preferably, the step S2 includes the following steps: s21, establishing a lower rail assembly welding process flow: detecting the size of the mounting position of the ship track → growing meat, polishing, detecting the size → mounting the track panel, fixing by spot welding → detecting the size → longitudinally splicing the upper part and the lower part of the symmetrical welding track panel → detecting the size regularly, correcting the shape → welding the other welding seams of the track panel → detecting → welding the stainless steel band → reporting and checking; s22, a welding process is carried out; s23, rail surface inspection; s24, installing and welding a stainless steel band; and S25, reexamining the space size and the parallelism of the rail surfaces.
Preferably, the step S3 includes the following steps: s31, establishing a middle rail welding process flow: detecting the size of a ship track mounting position → growing meat, polishing, detecting the size → hoisting the track in place → detecting the mounting size of the track → spot welding and fixing → welding upper and lower horizontal welding seams and monitoring at regular time, reshaping → welding a vertical welding seam → mounting a rib plate and an outer plate at a notch → size detection → welding of a stainless steel band → inspection; s32, integrally assembling and welding the middle rail; s33, deformation measurement monitoring in the welding process; s34, middle rail inspection; s35, installing and welding a stainless steel band; s36, the size, the planeness and the verticality of the central line of the track are rechecked.
Preferably, the step S4 includes the following steps: s41, formulating the whole assembly welding process flow of the upper rail: detecting the size of a ship body track installation position → repairing the allowance of an upper track and a groove → supporting the installation process → installing the track, detecting → fixing by spot welding → symmetrically welding the track (monitoring) → size detection → welding of a stainless steel band → reporting inspection; s42, assembling and welding; s43, deformation measurement monitoring in the welding process; s44, checking; s45, installing and welding a stainless steel band; s46, reexamining the space size, the planeness and the parallelism of the rail surfaces.
The invention also discloses a track installation process of the large cutter suction dredger, which comprises the following steps: s100, manufacturing a track section according to the structural characteristics of the track, and checking the size after forming; s200, conveying the manufactured track to a workshop in a subsection mode to process a track surface; s300, marking a track installation central plane measuring reference; s400, hull tests influencing the track installation precision are completed as far as possible after the hull sections are welded before welding; s500, taking 4 points at the intersection of the front rib position and the tail rib position of the track, the middle line surface, the base surface and the upper track surface by using a laser theodolite, scanning the middle line surface to be used as a welding reference surface, respectively installing 3 horizontal I-shaped steels passing through the central lines of the upper track, the middle track and the lower track at the back XX rib position, respectively pulling phi 0.3-0.5 steel wires passing through the central planes of the upper track, the middle track and the lower track on the middle line surface, and simultaneously pulling phi 0.3-0.5 steel wires on the side of each track to be used as a track detection reference; s600, respectively taking horizontal lines (total 6) parallel to a centerline plane at a track mounting outer plate, taking the intersection point of each line at a rib position as a detection base point, detecting the size of the base point of the 6 horizontal lines, recording, and finding out the deformation influence rule of the sunshine temperature difference on the ship body; s700, marking a measuring reference of a track installation central plane; s800, marking out a track installation line; s900, mounting the processed rail sections on the slipway, and fixing the rail by spot welding; s1000, measuring the installation size of the track, and fixing the tool by positioning, welding and fixing after the adjustment is qualified.
Preferably, the rail installation process flow comprises: the method comprises the steps of track segmentation manufacturing completion → identification of a midline reference → track installation line drawing → detection of the size of a ship track installation position → hoisting of a track → track installation detection → spot welding fixation → elimination of uneven clearance → installation of a rib plate and an outer plate at a notch → inspection recording → symmetrical welding of a track → size monitoring and recording → adjustment of welding sequence to correct welding deformation → size detection → stainless steel strip welding → inspection.
Compared with the prior art, the invention provides a manufacturing and mounting process of a track structure of a large cutter suction dredger trolley, which has the following beneficial effects:
1. the invention can improve the construction quality and efficiency of the trolley track, can also improve the economic benefit and realizes the localization of the front-end equipment cabin part.
2. The manufacturing process of the track of the large cutter suction dredger trolley is independent in research and development and independent in design, and can greatly improve the manufacturing quality and the working efficiency of equipment.
3. The mounting process of the trolley track of the large cutter suction dredger can improve mounting precision and mounting efficiency, is beneficial to improving the mounting quality and stability of the trolley track, and is also beneficial to large-scale production of enterprises.
Drawings
FIG. 1 is a plan view of a middle rail in a track structure of a large cutter suction dredger trolley;
FIG. 2 is a diagram of the requirements for installing, and welding the rail of FIG. 1;
FIG. 3 is a sequence diagram of the overall assembly and welding of a lower rail in a track structure of a large cutter suction dredger trolley;
FIG. 4 is a schematic diagram of a middle rail installation process in a track structure of a large cutter suction dredger trolley;
FIG. 5 is a sequence diagram of the middle rail installation welding in a track structure of a large cutter suction dredger trolley;
FIG. 6 is a sequence diagram of welding operation by the welding seam sectional skip welding method;
FIG. 7 is an elevation view of an upper rail installation in a track structure of a large cutter suction dredger trolley;
FIG. 8 is a sequence diagram of welding procedures of a sectional skip welding method of an upper rail welding line in a track structure of a large cutter suction dredger trolley;
FIG. 9 is a flow chart of a process for manufacturing a large cutter-suction dredger track according to the present invention;
FIG. 10 is a process view of track installation for a large cutter suction dredger trolley according to the present invention;
fig. 11 is a flow chart of an installation process of a large cutter suction dredger track according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment, the manufacturing and installation process requirements and the flow of the track structure of the cutter suction dredger with the reamer power of 5000kW are combined with the design and construction process of a dredger designed and constructed by a company as a product "Tianjing". The manufacture and installation of the rails in the bow area are an important process, the rail structure of the trolley is divided into three pairs of rails, namely a main rail (middle rail), an upper side rail and a lower side rail, and 10mm stainless steel bands are arranged on the rails. The three pairs of rails are divided into rail sections, and then the rails are assembled into the rails in small groups, and the technological method of welding after the whole rails are machined is implemented.
The dimensional deviations of the non-injection-molded parts, such as length, width, height, part spacing and the like, are required to meet the requirements of the A level specification of the table.
Table one: dimensional tolerance (mm)
The allowable deviations of straightness, flatness and parallelism of the non-injection-molded parts were performed as specified in table two, level E.
Table two: geometric tolerance (mm)
As shown in fig. 1 to 9, a process for manufacturing a large cutter suction dredger trolley track comprises the following steps: s1, formulating basic requirements; s2, integrally assembling and welding the lower rail; s3, integrally assembling and welding the middle rail; and S4, integrally assembling and welding the upper rail.
In the foregoing embodiment, specifically, the step S1 includes the following steps: s11, welding the lower rail and the middle rail in sequence, and finally welding the upper rail. The track frock adopts flexible location principle, rigidity location when welding operation promptly, and the rigidity restraint is partly released when measuring the control in the welding process to analysis welding deformation trend takes measures in time, adjusts welding sequence, reduces welding deformation in welding process, avoids welding deformation final release, can't correct. S12, hull tests influencing the track installation precision are completed as far as possible after the hull sections are welded before welding. S13, the detection program is detailed in track detection program of Vosta company (can be properly adjusted according to the actual condition of equipment of the company). S14, respectively taking horizontal lines parallel to the central line plane at the outer plate installation positions of the upper, middle and lower tracks, taking the intersection point of each line at the rib position as a detection base point, and continuously taking three days, 7 days earlier: 00, 1 in the afternoon: 30, evening 18: 30, detecting the sizes of the base points of the 6 horizontal lines, recording the sizes, and finding out the influence rule of the sunshine temperature difference on the deformation of the ship body. And S15, before the rail is welded at the stern, shading treatment is carried out by using color stripe cloth. To prevent the deformation of the hull caused by sunshine. And the construction is carried out in cloudy days or in the morning as much as possible.
In the foregoing embodiment, specifically, the step S2 includes the following steps: s21, establishing a lower rail assembly welding process flow: detecting the size of the mounting position of the ship track → growing meat, polishing, detecting the size → mounting the track panel, fixing by spot welding → detecting the size → longitudinally splicing the upper part and the lower part of the symmetrical welding track panel → detecting the size regularly, correcting the shape → welding the other welding seams of the track panel → detecting → welding the stainless steel band → reporting and checking; s22, a welding process: 1) detecting 3400 size of a mounting position of a lower track of a ship body, fleshing, and polishing to ensure the range of 3399.5-3400.5 mm in size; 2) detecting that the mounting size of the rail surface meets the requirement according to the figure 3; 3) after the rail panel is installed, the gap at the welding seam is ensured to be less than or equal to 0.3mm within 70 percent of the total length, and spot welding is carried out for fixation; 4) the rail surface mounting dimension detected according to fig. 3 should meet the requirements of fig. 2; 5) welding the upper and lower welding seams of the left and right lower rail surfaces at the same time, wherein the welding sequence is shown in figure 3, and the welding speed, the welding sequence and the current of each person are controlled to be the same during welding, so that the welding deformation is reduced; 6) the rail panel is detected for 3 times in the welding process, the workload of 1/3 welding is detected once, the detection result is compared with the requirement of figure 2 for analysis, the welding sequence is adjusted in time, and the welding deformation deviation is corrected. S23, rail surface inspection; drawing out a detection reference line by taking a midline as a reference according to the requirement of FIG. 2, and checking the size, flatness and parallelism of the track according to a track detection program by using a laser theodolite and measuring tools such as a ruler and the like; s24, installing and welding a stainless steel band according to the requirement of the figure 2; and S25, reexamining the space size and the parallelism of the rail surfaces.
In the foregoing embodiment, specifically, the step S3 includes the following steps: s31, establishing a middle rail welding process flow: detecting the size of a ship track mounting position → growing meat, polishing, detecting the size → hoisting the track in place → detecting the mounting size of the track → spot welding and fixing → welding upper and lower horizontal welding seams and monitoring at regular time, reshaping → welding a vertical welding seam → mounting a rib plate and an outer plate at a notch → size detection → welding of a stainless steel band → inspection; s32, the integral assembling and welding process of the middle rail comprises the following steps: 1) installing lower positioning process supports (figure 4), wherein the positioning process support positions are arranged at rib positions 0, 3, 5, 7, 9, 11, 13, 16 and 19, and the number of the positioning process supports can be properly increased when necessary; 2) before installation, the size of the installation position of the ship track is detected by taking the centerline plane as a reference; local correction such as fleshiness, polishing and the like is carried out; the butt joint clearance at the welding seam after the rail is installed is ensured to be less than or equal to 0.5 in the range of 70 percent of the total length. 3) Hoisting the left and right rails (about 21 tons each) to the installation position according to the sequence of the installation flow diagram of FIG. 4; the position size of the left track and the right track and the steel wedge block are installed and finely adjusted by matching a crane, a turnbuckle or a hand-operated hoist and the like, and the position of the center line of the track is detected by taking the centerline plane as a reference to meet the requirement of the figure 2; 4) installing rib plates and outer plates at the notches, welding and fixing, leaving a position 600 wide and 2 away from the outer plates at a proper position, making process air holes, and finally sealing after the track is welded; 5) installing an upper positioning process support (figure 4) in the same position as the lower positioning process support; 6) adjusting the upper and lower steel wedges to make the size meet the requirement of figure 2; 7) fixing the track and the lower steel wedge block by spot welding, and detecting according to the requirement of the figure 2 again; 8) welding according to the rail installation welding sequence diagram in the figure 5, namely welding seams; 9) welding vertical plate welds in two steps, welding a vertical plate at every other rib position, measuring welding deformation, and then properly adjusting the welding sequence according to the deformation condition to reduce welding deformation, and welding other vertical plate welds at the whole part; 10) welding the second welding seam and the third welding seam should be noted that the second welding seam and the third welding seam are asymmetric welding seams, the third welding seam is a whole welding seam, and the third welding seam is a segmented welding seam. After the welding seam is finished, welding the welding seam, and in order to reduce the non-uniform deformation caused by asymmetry, the welding seam is divided into 2 sections and 2 persons simultaneously adopt a skip welding method (as shown in figure 6), and the simultaneous welding of a plurality of persons is avoided as much as possible, so that the heating time is shortened, and the deformation is reduced. Welding deformation measurement is carried out after welding of every interval rib position of the welding line, the welding sequence is properly adjusted according to the deformation condition so as to reduce welding deformation, and welding of the residual welding line is finished; 11) in the welding process, a hammering method is used for striking a weld heat affected zone in time to reduce the internal stress as much as possible; 12) when welding, welding the port and starboard rails symmetrically and simultaneously, and paying attention to control welding deformation; s33, deformation measurement and monitoring in the welding process: 1) welding deformation is a relatively complex systematic problem, and in order to master the change trend of the deformation of the rail in the welding process, the welding deformation is strictly and seriously measured and monitored in the welding process so as to take remedial measures in time; 2) the detection times and sequence which must be ensured in the welding process are as follows: (1) detecting the size of the track before installation; (2) mounting and adjusting the rail, and detecting after spot welding and fixing; (3)1, detecting a welding seam after the first welding step is finished; (4)1, detecting a welding seam after the second welding step is finished; (5)2, after welding the welding seam, 3, detecting the welding seam after the first welding step is finished; (6)3, detecting the welding seam after the second welding step is finished; (7)3, detecting the welding seam after the second welding step is finished; (8)6, detecting after welding the weld joints; (9)7, detecting after welding the weld joints; during detection, the upper wedge block is detached after the welding seam is cooled so as to measure the variation trend of deformation; during detection, special attention should be paid to detecting the planeness and the verticality of the left track and the right track, and errors among the left track and the right track are compared; after measurement, recording is carried out for later inspection, deformation conditions are analyzed, the welding sequence is adjusted in time, and welding deformation errors are reduced; in addition to the detection times which must be ensured in the welding process, operators and inspectors also need to measure and control the size deformation condition at any time in an irregular way so as to take measures in time to ensure that the size meets the requirements; 7) if abnormal deformation is found, the inspector needs to call the welder to stop in time, find out the reason and adjust the welding sequence and method. S34, middle rail inspection; after all welding seams are welded, dismantling the upper wedge block and the lower wedge block, according to a track detection program and according to the requirements of a figure 2, taking a centerline plane as a reference, using a laser theodolite and measuring tools such as a square, a ruler and the like to check the track size, the planeness and the verticality, and dismantling the process support after the process support is qualified; s35, installing and welding a stainless steel band according to the requirement of the figure 2; s36, the size, the planeness and the verticality of the central line of the track are rechecked.
In the foregoing embodiment, specifically, the step S4 includes the following steps: s41, formulating the whole assembly welding process flow of the upper rail: detecting the size of a ship body track installation position → repairing the allowance of an upper track and a groove → supporting the installation process → installing the track, detecting → fixing by spot welding → symmetrically welding the track (monitoring) → size detection → welding of a stainless steel band → reporting inspection; s42, assembling and welding; 1) detecting the size of the installation position of the ship track, scribing the allowance of the upper track for secondary cutting, and forming a groove, so as to reduce the gap of a welding seam and the angle of the groove as much as possible; 2) detecting the size and the flatness of the beveled edge of the track; 3) installing lower positioning process supports (figure 7), wherein the positioning process support positions are arranged at rib positions 0, 3, 5, 7, 9, 11, 13, 16 and 19, and the number of the positioning process supports can be properly increased when necessary; 4) hoisting the rails, installing and fine-tuning the position sizes of the left and right rails and the steel wedge blocks by means of matching of a turnbuckle or a hand-driven block and the like, and detecting the sizes and the parallelism of the rail surface and the centerline surface to meet the requirements of the figure 2; 5) installing an upper positioning process support and a steel wedge block (figure 7), wherein the position of the positioning process support is the same as that of the lower positioning process support; detecting the dimension and the parallelism from the rail surface to the centerline surface again to meet the requirements of the figure 2; 6) fixing the track and the lower steel wedge block by spot welding; 7) taking the intersection point of the central line of the rail surface and the rib position as a detection base point, and detecting according to the requirements of track detection program and figure 2; 8) the skip welding method is adopted for welding (figure 8), the upper welding line and the lower welding line are welded simultaneously, welding deformation is detected once when two welding lines are welded, welding deviation is corrected in time, the welding sequence can be adjusted, and the welding deformation is developed towards the direction of reducing. S43, deformation measurement monitoring in the welding process; 1) welding deformation is detected once every two welding seams are welded, and 2) the upper wedge block is detached after the welding seams are cooled during detection so as to measure the variation trend of the deformation; 3) during detection, special attention should be paid to detecting the flatness and parallelism of the left track and the right track, and errors among the tracks are compared; 4) after measurement, recording is carried out for later inspection, deformation conditions are analyzed, the welding sequence is adjusted in time, and welding deformation errors are reduced; 5) in addition to the detection times which must be ensured in the welding process, operators and inspectors also need to measure and control the size deformation condition at any time in an irregular way so as to take measures in time to ensure that the size meets the requirements; if abnormal deformation is found, the inspector needs to call the welder to stop in time, find out the reason, and adjust the welding sequence and method. S44, checking; according to the requirements of track detection program and 2.2 pieces of figure 2, the dimension, the planeness and the parallelism of the track are detected by using a laser theodolite and a level gauge and by using measuring tools such as a ruler and the like by taking a midline plane as a reference. S45, installing and welding a stainless steel band according to the requirement of the figure 2; s46, reexamining the space size, the planeness and the parallelism of the rail surfaces.
The invention also discloses a track installation process of the large cutter suction dredger trolley, which comprises the following steps as shown in figure 10: s100, manufacturing a track section according to the structural characteristics of the track, and checking the size after forming; s200, conveying the manufactured track to a workshop in a subsection mode to process a track surface; s300, marking a track installation central plane measuring reference; s400, hull tests influencing the track installation precision are completed as far as possible after the hull sections are welded before welding; s500, taking 4 points at the intersection of the front rib position and the tail rib position of the track, the middle line surface, the base surface and the upper track surface by using a laser theodolite, scanning the middle line surface to be used as a welding reference surface, respectively installing 3 horizontal I-shaped steels passing through the central lines of the upper track, the middle track and the lower track at the back XX rib position, respectively pulling phi 0.3-0.5 steel wires passing through the central planes of the upper track, the middle track and the lower track on the middle line surface, and simultaneously pulling phi 0.3-0.5 steel wires on the side of each track to be used as a track detection reference; s600, respectively taking horizontal lines (total 6) parallel to a centerline plane at a track mounting outer plate, taking the intersection point of each line at a rib position as a detection base point, detecting the size of the base point of the 6 horizontal lines, recording, and finding out the deformation influence rule of the sunshine temperature difference on the ship body; s700, marking a track installation central plane measuring reference; s800, marking out a track installation line; s900, mounting the processed rail sections on the slipway, and fixing the rail by spot welding; s1000, measuring the installation size of the track, and fixing the tool by positioning, welding and fixing after the adjustment is qualified.
In the above embodiment, specifically, the track mounting process includes a specific flow, as shown in fig. 11:
the method comprises the steps of track segmentation manufacturing completion → identification of a midline reference → track installation line drawing → detection of the size of a ship track installation position → hoisting of a track → track installation detection → spot welding fixation → elimination of uneven clearance → installation of a rib plate and an outer plate at a notch → inspection recording → symmetrical welding of a track → size monitoring and recording → adjustment of welding sequence to correct welding deformation → size detection → stainless steel strip welding → inspection.
The components used in the present invention are all common standard components or components known to those skilled in the art, and the structure and principle thereof are well known to those skilled in the art.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a large-scale cutter suction dredger platform truck track structure which characterized in that: the trolley track structure is divided into three pairs of tracks including a main track, an upper side track and a lower side track, a 10mm stainless steel strip is arranged on the tracks, the trolley tracks are divided into track sections, small groups are assembled into the tracks, and the tracks are welded after being integrally machined, and the trolley track structure comprises the following steps:
s1, formulating basic requirements; s2, integrally assembling and welding the lower rail; s3, integrally assembling and welding the middle rail; s4, integrally assembling and welding the upper rail; the track tool adopts a flexible positioning principle, namely, rigidity positioning is carried out during welding operation, rigidity constraint is partially released during measurement and monitoring in the welding process so as to analyze welding deformation trend, measures are taken in time, the welding sequence is adjusted, welding deformation is reduced in the welding process, and the situation that the welding deformation is finally released and cannot be corrected is avoided;
the step S1 includes the following steps: s11, welding the lower rail and the middle rail in sequence, and welding the upper rail at last; s12, completing the assembling and welding of the ship body segment before assembling and welding, and completing a ship body test as far as possible; s13, formulating a detection program; s14, respectively taking horizontal lines parallel to the central line plane at the outer plate installation positions of the upper, middle and lower tracks, taking the intersection point of each line at the rib position as a detection base point, and continuously taking three days, 7 days earlier: 00, 1 in the afternoon: 30, evening 18: 30, detecting the sizes of the base points of the 6 horizontal lines, recording the sizes, and finding out the law of the influence of the sunshine temperature difference on the deformation of the ship body; s15, before the rail is welded at the stern, shading treatment is carried out by using color stripe cloth;
the step S2 includes the following steps: s21, establishing a lower rail assembly welding process flow: detecting the size of the mounting position of the ship track → growing meat, polishing, detecting the size → mounting the track panel, fixing by spot welding → detecting the size → longitudinally splicing the upper part and the lower part of the symmetrical welding track panel → detecting the size regularly, correcting the shape → welding the other welding seams of the track panel → detecting → welding the stainless steel band → reporting and checking; s22, a welding process is carried out; s23, rail surface inspection; s24, installing and welding a stainless steel band; s25, rechecking the space size and the parallelism of the rail surfaces;
s22, the welding process comprises the following steps:
detecting the size of the lower track installation position of the ship body during welding, growing meat and polishing;
after the rail panel is installed, the gap at the welding seam is ensured to be within 70 percent of the total length and less than or equal to 0.3mm, and the rail panel is fixed by spot welding;
detecting the installation size of a rail surface; welding upper and lower welding seams of the left lower rail surface and the right lower rail surface simultaneously, and controlling the welding speed, the welding sequence and the current of each person to be the same during welding so as to reduce welding deformation;
the rail panel is detected for 3 times in the welding process, the detection result is compared and analyzed once the work load of 1/3 is detected after welding, the welding sequence is adjusted in time, and the welding deformation deviation is corrected;
the step S3 includes the following steps: s31, establishing a middle rail welding process flow: detecting the size of a ship track mounting position → growing meat, polishing, detecting the size → hoisting the track in place → detecting the mounting size of the track → spot welding and fixing → welding upper and lower horizontal welding seams and monitoring at regular time, reshaping → welding a vertical welding seam → mounting a rib plate and an outer plate at a notch → size detection → welding of a stainless steel band → inspection; s32, integrally assembling and welding the middle rail; s33, deformation measurement monitoring in the welding process; s34, middle rail inspection; s35, installing and welding a stainless steel band; s36, rechecking the size, the planeness and the verticality of the central line of the track;
s32, the overall welding process of the middle rail comprises the following steps:
the lower positioning process support is installed, so that the number of the positioning process supports can be increased properly; before installation, the size of the installation position of the ship track is detected by taking the centerline plane as a reference; local correction such as fleshiness, polishing and the like is carried out; ensuring that the butt joint gap at the welding seam is within 70 percent of the total length and is less than or equal to 0.5mm after the rail is installed;
hoisting the left and right rails to an installation position, finely adjusting the position size of the left and right rails and the steel wedge blocks, and detecting the position of the center line of the rails by taking the centerline plane as a reference;
installing rib plates and an outer plate at the gap, welding and fixing, reserving 2 process air holes with the width of 600mm at the proper position on the outer plate, and finally sealing after the track is welded;
installing an upper positioning process support, wherein the position of the upper positioning process support is the same as that of the lower positioning process support;
adjusting an upper steel wedge block and a lower steel wedge block;
fixing the track and the lower steel wedge block by spot welding;
welding vertical plate welds in two steps, welding a vertical plate at every other rib position, measuring welding deformation, and then properly adjusting the welding sequence according to the deformation condition to reduce welding deformation, and welding other vertical plate welds at the whole part; 10) welding the second welding seam and the third welding seam should be noted that the second welding seam and the third welding seam are asymmetric welding seams, the third welding seam is a whole welding seam, and the third welding seam is a segmented welding seam. After the welding seam is finished, welding the welding seam, and in order to reduce the uneven deformation generated by asymmetry, the welding seam is divided into 2 sections and 2 persons are welded simultaneously by adopting a skip welding method, so that the simultaneous welding of a plurality of persons is avoided as much as possible, the heating time is shortened, the deformation is reduced, the welding deformation measurement is carried out after the welding seam is welded at every rib position at intervals, the welding sequence is properly adjusted according to the deformation condition to reduce the welding deformation, and the welding of the residual welding seam is finished;
in the welding process, a hammering method is used for striking a weld heat affected zone in time to reduce the internal stress as much as possible;
when welding, welding the port and starboard rails symmetrically and simultaneously, and paying attention to control welding deformation;
the step S4 includes the following steps: s41, formulating the integral assembly welding process flow of the upper rail: detecting the size of a ship track mounting position → repairing the allowance of an upper track and a groove → supporting the mounting process → mounting the track, detecting → fixing by spot welding → symmetrically welding the track → detecting the size → welding a stainless steel band → reporting and checking; s42, assembling and welding; s43, deformation measurement monitoring in the welding process; s44, checking; s45, installing and welding a stainless steel band; s46, reexamining the space size, the planeness and the parallelism of the rail surfaces; wherein:
s42, the welding process comprises the following steps:
detecting the size of the installation position of the ship track, scribing the allowance of the upper track for secondary cutting, and forming a groove, so as to reduce the gap of a welding seam and the angle of the groove as much as possible;
detecting the size and the flatness of the beveled edge of the track;
the lower positioning process supports are installed, so that the number of the positioning process supports can be increased properly;
hoisting the rails, finely adjusting the position sizes of the left rail and the right rail and the steel wedge blocks, and detecting the sizes and the parallelism of the rail surface and the centerline surface;
installing an upper positioning process support and a steel wedge block, wherein the position of the upper positioning process support is the same as that of the lower positioning process support; detecting the dimension and the parallelism from the rail surface to the centerline surface again;
fixing the track and the lower steel wedge block by spot welding;
detecting by taking the intersection point of the central line of the rail surface and the rib position as a detection base point;
the skip welding method is adopted for welding, the upper welding line and the lower welding line are welded simultaneously, welding deformation is detected once when every two welding lines are welded, welding deviation is corrected in time, the welding sequence can be adjusted, and welding deformation is developed towards the direction of reduction.
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| CN112498620B (en) * | 2020-12-09 | 2021-07-30 | 江南造船(集团)有限责任公司 | CTD traveling crane installation method |
| CN112550558A (en) * | 2020-12-22 | 2021-03-26 | 武昌船舶重工集团有限公司 | System and method for installing steel piles of dredger |
| CN112916985B (en) * | 2021-01-28 | 2022-07-01 | 广州文冲船厂有限责任公司 | Welding method for steel pile trolley rail |
| CN114453711B (en) * | 2022-03-17 | 2023-06-23 | 广州文冲船厂有限责任公司 | Welding method for side guide plate of steel pile trolley of dredger |
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