CN101423107A - Assembling and welding technique of ship water-jet propulsion flow-passage grid - Google Patents
Assembling and welding technique of ship water-jet propulsion flow-passage grid Download PDFInfo
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- CN101423107A CN101423107A CNA2007100477167A CN200710047716A CN101423107A CN 101423107 A CN101423107 A CN 101423107A CN A2007100477167 A CNA2007100477167 A CN A2007100477167A CN 200710047716 A CN200710047716 A CN 200710047716A CN 101423107 A CN101423107 A CN 101423107A
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Abstract
The invention discloses a welding process used for a marine water-jet propulsion chute grate. The process comprises the following steps: firstly, grate components are processed well and the margins are pre-preserved; the actual mounting is carried out to define the actual mounting positions and the final sizes of the components; the components are pre-fixed through spot welding; and after checked and passed, the components are welded in the ship chute to form a complete grate. The proper sequence and process parameters are adopted in the welding so as to reduce the internal stress as much as possible; after welding, the whole grate is demounted to repair welding seams and carry out aging treatment and then the grate is remounted so as to further enhance the strength of the grate and reduce internal stress. The invention can better satisfy the technical requirement and precision requirement of manufacturing, mounting and welding the chute grate so as to avoid the cracks or breaking of grate strips caused by the wearing of the grate structure due to ship vibration.
Description
Technical field
The invention belongs to the technology of hull construction field, relate to a kind of boats and ships that adopt waterjet propulsor in particular in manufacture process, the process of dress weldering flow-passage grid in its water inlet flow channel.
Background technology
Waterjet propulsor is as a kind of special marine propulsion; characteristics such as having that anti-cavity ability is strong, appendage drag is little, protective value good, noise is low, transmission device is simple, adapt to that the varying duty ability is strong, manoeuvre of ship and dynamic positioning performance are good, and strandedly save oneself, turn round, ability such as reversing all is that conventional screw propeller is incomparable.Waterjet propulsor occupies leading position in the high-speed boat field, also use on the changeable towboat of operating mode and the ship of war that maneuvering performance is had relatively high expectations.
At present, both at home and abroad the water inlet flow channel of hydro-jet propulsion system provides (steel, aluminium or glass-felt plastic) or usually by the a/s design paper manufacturing of shipyard by water jet propulsion pump supplier is complete.The corrosion-resistant steel flow-passage grid is as the part of whole water-jet propulsion flow-passage structure, and it mainly acts on is to prevent entering of water inlet Bulky Waste, foreign material (as wooden unit, plastics, fishnet etc.), in order to avoid water jet propulsion pump is produced harmful effect or damages the pump housing.
The manufacturing of flow-passage grid and dress are welded with strict technical requirements and accuracy requirement: reduce assembling as far as possible in manufacturing process, weld the various unrelieved stresss that cause.The weld seam of all connecting joint should have good quality, and surface finish is smooth, reduces stress concentration, improves anti-fatigue performance.The making of flow-passage grid needs according to real ship through the on-the-spot preparation of the deviation of the revised runner line style of setting-out.Grid is connected with runner should be firm, prevents because of connecting the loosening vibration that causes.The grid members surface should be smooth, and the front and back end attaching parts is installed should guarantee the fairing of runner line style, avoids runner flow field and cavity are produced harmful effect.
The hull form at flow-passage grid place is complicated, structure is stronger, because factors such as the assembly error of hull, residual contraction distortion after welding, make theoretical size, the shape of setting-out all can produce different deviations with real ship, therefore creative activity model or sample case on request can only adopt on the real ship the making of flow-passage grid and directly the hull flow passage structure that has completed to be made as the sample packing list preparation of making flow-passage grid.Most welding job is carried out on real ship loose tool as far as possible.
The above-mentioned technical requirements of flow-passage grid dress weldering and accuracy requirement are that ship building proposes new problem.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of assembling and welding process of ship water-jet propulsion flow-passage grid, can reach above-mentioned technical requirements and accuracy requirement well.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of assembling and welding process of ship water-jet propulsion flow-passage grid, described flow-passage grid is made of grill frame, grid bar, crosspiece and crosspiece seat, grill frame and back grill frame before wherein grill frame comprises, described assembling and welding process may further comprise the steps:
One) according to the design paper blanking and process possessive case grizzly bar, crosspiece, crosspiece seat and the back grill frame, wherein the two ends of grid bar place suitable surplus;
Two) make the iron sample according to the true form of hull runner, blanking processes preceding grill frame according to the iron sample;
Three) on ship hull plate, determine the flow-passage grid line of centers, mark grid bar hookup wire, grill frame is fitted in the hull runner temporarily, and respectively with the hookup wire mark to grill frame, mark the position of bolt hole in the grid bar hookup wire neutral gear on grill frame;
Four) take off grill frame, the processing bolt hole, and then utilize the bolt hole on the grill frame on ship hull plate, to join the auger shell hole;
Five) utilize bolt that grill frame and crosspiece seat are fixed on the ship hull plate, make it to fit fully with the hull runner;
Six) according to the grid bar hookup wire of mark on the grill frame, worked-out grid bar is carried out real ship be equipped with, excise two ends surplus and well cutting corner cut, on the grid bar, mark the position in crosspiece hole then;
Seven) on the grid bar, process the crosspiece hole;
Eight) the grid bar is installed back in the grill frame, crosspiece should be penetrated in good time in the crosspiece hole of grid bar during installation, then with the two ends tack welding of grid bar to grill frame, with the perforation point of connection tack welding of crosspiece with a middle grid bar, all the other perforation point of connection keep free states;
Nine) check guarantees that the grid bar is parallel and spacing dimension is correct, and crosspiece does not have obvious deflection;
Ten) real ship welding, the point of connection of whole point of connection of plaid matching grizzly bar and grill frame, crosspiece and crosspiece and crosspiece seat welds, and finishes the integral solder of flow-passage grid.
As improvement to such scheme, after flow-passage grid integral body welds, flow-passage grid integral body is pulled down, carrying out weld seam repairing, polishing and weld seam penetrant inspection detects, fully discharge the internal stress that produces in the welding process by natrual ageing or heat treatment measure, grid surface is carried out acid wash passivation handle, improve its presentation quality and improve decay resistance, after the assay was approved, again the flow-passage grid integral installation is arrived in the hull runner.
Preferably, adopt the segmentation jump method that each point of connection is welded described step 10).
Preferably, described step 10) welding method in adopts CO2 gas shield arc welding, and welding material is selected MIG316L property of medicine welding wire for use.
Preferably, the grid bar all adopts two-sided sequential welding, leg 6-8mm with being connected of grill frame; Sequential welding is on every side all adopted in the connection of crosspiece dative grizzly bar, crosspiece seat, foot welding height 4-6mm.
Preferably, the corner connection weld seam of described grid bar and grill frame adopts two-layer welding, and plaid matching grizzly bar two ends weld seam carries out the cornerite weldering earlier before carrying out the ground floor welding.
Further optimally, described two-layer parameters of welding is as follows: ground floor: gage of wire 1.2mm, welding current 150-180A, arc voltage 24-26V, gas flow 14-16L/min; The second layer: gage of wire 1.2mm, welding current 180-200A, arc voltage 26-28V, gas flow 14-16L/min.
Process of the present invention is by rational parts processing and manufacturing mode and appropriate sequence of fitting and welding, can guarantee to greatest extent that flow-passage grid and hull runner fit fully, reduce the internal stress of flow-passage grid to greatest extent, satisfied the technical requirements and the accuracy requirement of flow-passage grid manufacturing and dress weldering.Process easy operating of the present invention is convenient to grasp, and has withstood the test that real ship uses.Can guarantee the quality and the intensity of cell sructure itself, and then the reasonable assembling of assurance and real ship, avoid causing cell sructure fatigue to crack or the fracture of grid bar because of ship vibration.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the structural representation of flow-passage grid.
Fig. 2 is the scheme drawing of grid bar.
Fig. 3 is a flow-passage grid middle rail connection diagram.
Fig. 4 is a cell sructure sequence of welding scheme drawing.
The specific embodiment
As shown in Figure 1, the corrosion-resistant steel flow-passage grid of ship water-jet propulsion flow-passage is made of preceding grill frame 1, back grill frame 5, grid bar 2, crosspiece 4 and crosspiece seat 3, grid bar 2 and crosspiece 4 intersect to form grid-like in length and breadth, the two ends of grid bar 2 are connected with preceding grill frame 1, back grill frame 5 respectively, the two ends of a crosspiece in the middle of crosspiece seat 3 is connected.Wherein preceding grill frame 1, back grill frame 5 and crosspiece seat 3 need be fixed in the hull runner, particularly, make itself and hull runner good fit because preceding grill frame 1 is one section long curve, and the minimizing internal stress, the assembling of parts should be carried out at the runner scene, and concrete technology is as follows:
(1) processing and manufacturing of grid members
The grid bar is carried out computer lofting according to design paper, determine knuckle direction, knuckle angle and the knuckle two ends length of each root grid bar, and determine the true form of grill frame by setting-out according to actual setting-out result.The fillet of R20 is all fallen at two knuckle 21 places (as Fig. 2) of each root grid bar, help avoiding producing stress concentration like this, structure is also more reasonable.The two ends of possessive case grizzly bar all place suitable surplus when setting-out and blanking.By the setting-out established data, behind the underwater plasma cutting stock, process the asymmetric class airfoil section of grid bar on request by machinework, the finished surface of possessive case grizzly bar should polish smooth.Use machined into cylindrical, auger shell hole after the blanking of crosspiece seat.Crosspiece and back grill frame blanking, machinework.
(2) real ship processing, assembling
After real boat measurement gets the external form finish size, make tapping sample by real boat fare type, in view of the above grid deckle board before the processing.Press grill frame before the good semi arch of iron sample preliminary working, the on-the-spot check and correction of real ship guarantees to coincide with hull flow passage structure line style, can paste clothes with ship hull plate after requiring bolt to tighten.
On ship hull plate, determine the flow-passage grid line of centers, mark grid bar hookup wire, and respectively with the hookup wire mark to the grid deckle board, arrange screw in the hookup wire neutral gear that on grill frame, marks, row's eye placed in the middle as far as possible, when the grid bar is influential to bolted, can in grid spacing 1/3rd scopes, adjust.The sample dotting punch has been struck at the screw center, takes off brill, ream counterbore, overlaps the auger shell hole by the bolt hole position of having bored on the grill frame on the hull relevant position then.
(3) flow-passage grid prepackage
The grid deckle board is fixed on the corresponding planking on request (prepackage fixedly time can use the hexagonal galvanized bolt), require with planking as far as possible subsides obey.Worked-out grid bar is carried out real ship to be equipped with, guarantee grid bar end opening knuckle point in a straight line, and make this some position parallel, behind the positive foot of surplus cutting to the grid bar end opening left and right sides of stem part, grid bar two termination corner cuts are well cutting simultaneously, and the corner cut upstream face should be polished into arc surface.Mark grid crosspiece bore position line, and pound out drill center sample dotting punch, the grid bar is taken off boring.
The grid bar is installed, and the grid crosspiece should penetrate in the grid bar in good time during installation, and the crosspiece seat also in time is inserted in the two ends of crosspiece and is temporarily fixed on the ship hull plate with galvanized bolt.Grid bar two ends are behind tack welding location on the grill frame, and all grid crosspieces are only made tack welding at middle grid bar perforating position, and all the other position point of connection wouldn't tack welding, makes it be in relaxation state.
Pre-install complete back (state is spot welding) and test, require grid stripe pitch size correct and parallel, the grid crosspiece does not have obvious deflection, just can carry out real ship welding after qualified.
(4) real ship welding
The point of connection of whole point of connection of plaid matching grizzly bar and grill frame, crosspiece and crosspiece and crosspiece seat welds, and finishes the integral solder of flow-passage grid.Welding method adopts CO2 gas shield arc welding, and welding material is selected MIG316L property of medicine welding wire for use.
Quality inspection comprises before the weldering: welding material, the processing of technology groove, assembly quality, cleaning and polishing situation.Welding preceding part strengthens with controlled deformation.
The grid bar all adopts two-sided sequential welding, leg 6-8mm with being connected of grill frame; Sequential welding is on every side all adopted in the connection of grid crosspiece dative grizzly bar and crosspiece seat, foot welding height 4-6mm.
The corner connection weld seam of grid bar and grill frame adopts two-layer welding, and corner connection CO2 gas shield arc welding technological parameter is as follows:
| Level | Wlding specification (mm) | Welding current (A) | Arc voltage (V) | Gas flow (L/min) |
| Ground floor | ф1.2 | 150-180 | 24-26 | 14-16 |
| The second layer | ф1.2 | 180-200 | 26-28 | 14-16 |
Reply grid bar two ends weld seam carries out the cornerite weldering earlier before carrying out the ground floor welding, cornerite weldering and every layer of welding all should be adopted the segmentation jump method, produce the pulling force of heat when welding to bolt of rear end plate to reduce, reduce distortion, reduce internal stress, cornerite weldering and sequence of welding are carried out in strict accordance with the order of solder joint label among Fig. 4.Crosspiece welds a place by sequence of welding tack welding one place, and the crosspiece two ends must treat just can weld after all weld seams all weld, and with the internal stress that produces in the abundant release crosspiece welding process, all bead appearances should be evenly full.
After welding flow-passage grid integral body is pulled down, carried out weld seam repairing, polishing and weld seam penetrant inspection and detect.Fully discharge the internal stress that produces in the welding process by natrual ageing or heat treatment measure.Grid surface is carried out acid wash passivation handle, improve its presentation quality and improve decay resistance.
In the above-mentioned welding process, can compare with CO2 gas shield arc welding and two kinds of methods of SMAW respectively, found that and adopt CO2 gas shield arc welding will improve more than 50% than the work efficiency of SMAW.And under same sequence of welding, adopt the grid about 300mm length of grid deckle board place before semicircular arc of CO2 gas shield arc welding, on former basis, produce the shrinkage distortion of about 2mm; And the about 450mm length of grid deckle board before the semicircular arc place that adopts SMAW produces the about 4-6mm of shrinkage distortion on former basis.
(5) the real ship of flow-passage grid is installed
All are connected screw and all finish and join brill with flow passage structure after the assay was approved in the grid field weld with hull, pre-buried stainless steel wire swivel nut in the screw, and screw hole dimensions and silk braid length should be determined according to standard-required is on-the-spot.All screws connect boring depth, should guarantee that the residual thickness of the pre-buried thickening plate of runner is not less than 5mm.All stainless steel bolts, steel-wire screw-socket, stainless steel screw unthreaded portion all should be coated with the happy safe glue of fastening type when installing.
The corrosion-resistant steel flow-passage grid carries out real ship and installs after the assay was approved, and assemblage gap and the embedding of flathead screw tail place are mended epoxy glue, and epoxy glue is filled up the surface and answered fairing, smooth, to guarantee the runner line style.
Process of the present invention can extensively apply to the manufacturing and the weldering of real ship dress of water jet propulsion ship corrosion-resistant steel flow-passage grid structure.
Claims (7)
1. the assembling and welding process of a ship water-jet propulsion flow-passage grid, described flow-passage grid is made of grill frame, grid bar, crosspiece and crosspiece seat, grill frame and back grill frame before wherein grill frame comprises, described assembling and welding process may further comprise the steps:
One) according to the design paper blanking and process possessive case grizzly bar, crosspiece, crosspiece seat and the back grill frame, wherein the two ends of grid bar place suitable surplus;
Two) make the iron sample according to the true form of hull runner, blanking processes preceding grill frame according to the iron sample;
Three) on ship hull plate, determine the flow-passage grid line of centers, mark grid bar hookup wire, grill frame is fitted in the hull runner temporarily, and respectively with the hookup wire mark to grill frame, mark the position of bolt hole in the grid bar hookup wire neutral gear on grill frame;
Four) take off grill frame, the processing bolt hole, and then utilize the bolt hole on the grill frame on ship hull plate, to join the auger shell hole;
Five) utilize bolt that grill frame and crosspiece seat are fixed on the ship hull plate, make it to fit fully with the hull runner;
Six) according to the grid bar hookup wire of mark on the grill frame, worked-out grid bar is carried out real ship be equipped with, excise two ends surplus and well cutting corner cut, on the grid bar, mark the position in crosspiece hole then;
Seven) on the grid bar, process the crosspiece hole;
Eight) the grid bar is installed back in the grill frame, crosspiece should be penetrated in good time in the crosspiece hole of grid bar during installation, then with the two ends tack welding of grid bar to grill frame, with the perforation point of connection tack welding of crosspiece with a middle grid bar, all the other perforation point of connection keep free states;
Nine) check guarantees that the grid bar is parallel and spacing dimension is correct, and crosspiece does not have obvious deflection;
Ten) real ship welding, the point of connection of whole point of connection of plaid matching grizzly bar and grill frame, crosspiece and crosspiece and crosspiece seat welds, and finishes the integral solder of flow-passage grid.
2. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 1, it is characterized in that: after flow-passage grid integral body welds, flow-passage grid integral body is pulled down, carrying out weld seam repairing, polishing and weld seam penetrant inspection detects, fully discharge the internal stress that produces in the welding process by natrual ageing or heat treatment measure, grid surface is carried out acid wash passivation handle, improve its presentation quality and improve decay resistance, after the assay was approved, again the flow-passage grid integral installation is arrived in the hull runner.
3. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 1 is characterized in that: adopt the segmentation jump method that each point of connection is welded described step 10).
4. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 1 is characterized in that: the welding method described step 10) adopts CO2 gas shield arc welding, and welding material is selected MIG316L property of medicine welding wire for use.
5. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 4, it is characterized in that: the grid bar all adopts two-sided sequential welding, leg 6-8mm with being connected of grill frame; Sequential welding is on every side all adopted in the connection of crosspiece dative grizzly bar, crosspiece seat, foot welding height 4-6mm.
6. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 4, it is characterized in that: the corner connection weld seam of described grid bar and grill frame adopts two-layer welding, and plaid matching grizzly bar two ends weld seam carries out cornerite earlier and welds before carrying out the ground floor welding.
7. the assembling and welding process of ship water-jet propulsion flow-passage grid according to claim 6, it is characterized in that: described two-layer parameters of welding is as follows: ground floor: gage of wire 1.2mm, welding current 150-180A, arc voltage 24-26V, gas flow 14-16L/min; The second layer: gage of wire 1.2mm, welding current 180-200A, arc voltage 26-28V, gas flow 14-16L/min.
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| CN2007100477167A CN101423107B (en) | 2007-11-01 | 2007-11-01 | Assembling and welding technique of ship water-jet propulsion flow-passage grid |
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| CN2007100477167A CN101423107B (en) | 2007-11-01 | 2007-11-01 | Assembling and welding technique of ship water-jet propulsion flow-passage grid |
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| CN101423107A true CN101423107A (en) | 2009-05-06 |
| CN101423107B CN101423107B (en) | 2011-01-26 |
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| CN101941137A (en) * | 2010-08-18 | 2011-01-12 | 武昌船舶重工有限责任公司 | Technology for reducing allowance cutting during ship building |
| CN102059461A (en) * | 2010-12-15 | 2011-05-18 | 广州中船黄埔造船有限公司 | High precision welding method for rudder horn, propeller shaft bracket and intermediate shaft bracket of long shaft ship |
| CN102513664A (en) * | 2011-12-29 | 2012-06-27 | 江南造船(集团)有限责任公司 | Actual ship assembly welding process for ultra-large high-precision base |
| CN108127280A (en) * | 2017-11-03 | 2018-06-08 | 武汉船用机械有限责任公司 | Dink grid plate welding method |
| CN108637510A (en) * | 2018-04-26 | 2018-10-12 | 广州文冲船厂有限责任公司 | A kind of welding method of straight ladder for ship |
| CN108750059A (en) * | 2018-05-03 | 2018-11-06 | 中国船舶工业集团公司第七0八研究所 | A kind of mixing propeller cell structure of integrated channel lip |
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| CN101941137B (en) * | 2010-08-18 | 2012-05-23 | 武昌船舶重工有限责任公司 | Technology for reducing allowance cutting during ship building |
| CN101941137A (en) * | 2010-08-18 | 2011-01-12 | 武昌船舶重工有限责任公司 | Technology for reducing allowance cutting during ship building |
| CN102059461A (en) * | 2010-12-15 | 2011-05-18 | 广州中船黄埔造船有限公司 | High precision welding method for rudder horn, propeller shaft bracket and intermediate shaft bracket of long shaft ship |
| CN102059461B (en) * | 2010-12-15 | 2012-12-12 | 广州中船黄埔造船有限公司 | High precision welding method for rudder horn, propeller shaft bracket and intermediate shaft bracket of long shaft ship |
| CN102513664A (en) * | 2011-12-29 | 2012-06-27 | 江南造船(集团)有限责任公司 | Actual ship assembly welding process for ultra-large high-precision base |
| CN102513664B (en) * | 2011-12-29 | 2013-06-26 | 江南造船(集团)有限责任公司 | Actual ship assembly welding process for ultra-large high-precision base |
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| CN110053710A (en) * | 2019-04-29 | 2019-07-26 | 广船国际有限公司 | A kind of processing method, ship plank and the ship of the grid of ship plank |
| CN110254612A (en) * | 2019-06-27 | 2019-09-20 | 广船国际有限公司 | A kind of boring method and boat segmental of sea water tank grate opening |
| CN110254612B (en) * | 2019-06-27 | 2021-08-24 | 广船国际有限公司 | Method for drilling sea water tank grating holes and ship section |
| CN111438239A (en) * | 2020-04-07 | 2020-07-24 | 江阴伊克赛特汽车饰件有限公司 | Grid processing equipment and method thereof |
| CN111438239B (en) * | 2020-04-07 | 2022-02-18 | 江阴伊克赛特汽车饰件有限公司 | Grid processing equipment |
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| CN101423107B (en) | 2011-01-26 |
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