CN104439744A - Welding method for transportation end cap of 1000MW generator stator - Google Patents
Welding method for transportation end cap of 1000MW generator stator Download PDFInfo
- Publication number
- CN104439744A CN104439744A CN201410718417.1A CN201410718417A CN104439744A CN 104439744 A CN104439744 A CN 104439744A CN 201410718417 A CN201410718417 A CN 201410718417A CN 104439744 A CN104439744 A CN 104439744A
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- China
- Prior art keywords
- welding
- end cap
- weld
- weld seam
- transport
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
Abstract
The invention provides a welding method for a transportation end cap of a 1000MW generator stator. Through standards and requirements for welding sequence, fillet weld size control, riveting size control, the setting of an auxiliary tie bar and stress release treatment, the requirement of form and location tolerance of welding is guaranteed, welding deformation is controlled, the welding line and structural strength of the transportation end cap reach the requirement of transportation safety, the requirement of assembly application is met, and the transportation safety of the 1000MW generator stator is guaranteed.
Description
Technical field: the present invention relates to a kind of 1000MW generator unit stator transport end cap welding method.
Background technology: the overweight degree that transfinites of 1000MW level ultra supercritical steam turbine generating stator transport is high, transport and difficulty thereof, transportation problem rises to bottlenecks, as paper " before the railway transportation of 1000MW stator of steam turbine generator preparation " (article numbering 1005-006X (2013) 04-0057-02), " DQ45 type clamp type lorry end cap mode transports the experimental study of 1000MW generator unit stator " (article numbering 1001-4632 (2011) 04-0109-08) have detailed discussion to this problem;
1000MW level ultra supercritical steam turbine generator designs problems faced is that the size of its stator and weight exceed transportation limitation, becomes bottlenecks problem in the transport in inland.
At Railway Transport Industry, this kind of large cargo transport of large turbo-type generator stator belongs to large and lengthy cargo transport, haulage vehicle version has stronger specific aim, can suitable special vehicle transport the prerequisite implemented, and these vehicles also developed for demand, stator of steam turbine generator section is large, and self stiffness is high, is applicable to adopting schnabel car transport.
The technical conditions such as structure clearance, sweep, axle load, bridge changing load, specifications for design of cars of railway constrain the design of cart, the bearing capacity of vehicle can not unconfinedly be improved, the bridges and culverts of some length-specifics becomes restriction thresholding of passing a bridge, the gross weight maximum permissible value of vehicle and goods is defined, under this constraint, loss of weight becomes the common issue of generator unit stator and vehicle;
The overall railway transportation scheme of 1000MW generator unit stator adopts the transport interface unit of transport end cap version, transport end cap is the critical component of schnabel car transport 1000MW generator unit stator, be related to the integrality of vehicle, be responsible for the transmission of static(al) and transport shocks power, the huge concentrfated load applied by clamp beam pin-and-hole and compression leg will be delivered to the positions such as support crust by transport interface unit; Because construction weight is strictly limited, complex structure, if welding step and method improper, very easily cause that physical dimension is overproof, weld seam and structural strength do not reach the problems such as transportation safety requirement, generation cannot be assembled and used or cause transportation safety hidden danger.
Summary of the invention: the object of this invention is to provide a kind of 1000MW generator unit stator transport end cap welding method, by controlling welding sequence, fillet weld size, rivet size Control, the setting of auxiliary lacing wire, the specification of the process that eliminates stress and requirement, reach guarantee welding Geometrical Tolerance Principle, control welding deformation, make the weld seam of transport end cap and structural strength reach transportation safety requirement, meet assembling and use requirement, ensure 1000MW generator unit stator transportation safety.
Technical scheme of the present invention is: a kind of 1000MW generator unit stator transport end cap welding method, is characterized in that: take following scheme measure and step;
Physical dimension is Adjusted Option in advance: the diameter of bore size of end plate is increased 8mm, gabarit diameter dimension increases 8mm;
Basic architecture Adjusted Option in advance during riveted joint: group is apart from increasing 5mm, interior apart from increasing 2mm;
Riveting process and welding process follow these steps to and require to carry out:
Step one: riveting process, riveted joint weld width is 6-8mm, riveted joint fusion length 30-50mm, interval 200-300mm, by physical dimension in advance Adjusted Option size increase requirements rivet; Adopt supplemental support measure: adopt and compensate the auxiliary fixing left otic placode group of lacing wire and auris dextra plate group; Adopt two transport end cap methods of simultaneously welding, end cap is back-to-back to be connected to make two to transport with lacing wire;
Step 2: implement welding step, weld seam adopts little weldering amount multiple welding method to complete, and the weldering amount average out to of all main structure weld seams has welded for five times, compensate lacing wire interior compensation weld seam and repay outward weld seam also average out to welded for five times, the order of each welding is: a seam outside weld, b seam inside weld, compensates weld seam in c, otic placode inside weld in d, otic placode outside weld in e, f external compensation weld seam, the outer otic placode inside weld of g, the outer otic placode outside weld of h; K cleaning is polished, is detected a flaw and eliminate defect; Above-mentioned welding procedure a-k repeats the whole weldering amounts completing main structure weld seam for five times altogether, carries out the while that welding wanting two pieces to transport end cap with step, and the welding of every part transport end cap also wants symmetrical carrying out; Other non-master construction joints carry out after the 4th main structure weld seam has welded;
Step 3: transport end cap annealing steps, the transport end cap completing all welding still keeps back-to-back connection status, carries out annealing operation; After annealing operation terminates, excision lacing wire and compensation lacing wire, complete whole welding sequence.
Technique effect: the diameter of bore size of end plate is increased 8mm to physical dimension by Adjusted Option in advance, gabarit diameter dimension increases 8mm, group is apart from increasing 5mm, interior apart from increasing 2mm; This requirement is that transport end cap main structure weld seam leg is large in order to eliminate, the problem that the physical dimension that causes greatly diminishes is shunk in welding and the structure amplification quantity in advance taked, and offsets the amount of contraction of welding and annealing; If do not taked this measure, after causing welding, physical dimension diminishes and the problem of allowance deficiency;
Adopt and compensate lacing wire and assist the supplemental support measure of fixing left otic placode group and auris dextra plate group can ensure left otic placode group and the auris dextra plate group perpendicularity relative to end plate; Two back-to-back methods of attachment of transport end cap weldering lacing wire of simultaneously welding are adopted to be that the bending stress being formed as the generation of two transport end caps interacts, cancels out each other, mutually pins down suppression flexural deformation; If do not adopted the method, because outside weld amount in transport end cap is different and end plate rigidity is weak, end plate and seam can be made to produce severe bends distortion and cannot use;
Step 2 is implemented welding step and is defined and adopt little weldering amount multiple welding method to complete and regulation welding procedure is that reducing welding deformation ensures welding quality, welding is carried out with step simultaneously and symmetrical be also be that reducing welding deformation ensures welding quality; Compensate the interior compensation weld seam of lacing wire and to repay weld seam outward also average out to weld for five times be to ensure to compensate lacing wire and to transport end cap synchronous owing to welding the contraction caused, avoid being out of shape and inconsistently cause torsional deformation;
To transport end cap annealing steps, step 3 requires that transport end cap still keeps back-to-back connection status, it is minimum to carry out the deformation effect that annealing operation can make to cause during annealing.
Accompanying drawing illustrates:
Fig. 1 is physical dimension Adjusted Option schematic diagram in advance.
Fig. 2 is two back-to-back connection diagrams of transport end cap.
Fig. 3 is for implementing welding step schematic diagram.
Detailed description of the invention:
The present invention takes following scheme measure and step;
The diameter of bore size 2 of end plate 1 as shown in Figure 1, is increased 8mm, gabarit diameter dimension 3 increases 8mm by physical dimension in advance Adjusted Option;
Basic architecture Adjusted Option in advance during riveted joint: group increases 5mm apart from 4, and interior distance 5 adds 2mm;
Riveting process and welding process follow these steps to and require to carry out:
Step one: riveting process, riveted joint weld width is 6-8mm, riveted joint fusion length 30-50mm, interval 200-300mm, by physical dimension in advance Adjusted Option size increase requirements rivet; Adopt supplemental support measure: adopt and compensate the auxiliary fixing left otic placode group 7 of lacing wire 6 and auris dextra plate group 8; As shown in Figure 2, adopt two transport end cap methods of simultaneously welding, end cap is back-to-back to be connected to make two to transport with lacing wire 9;
Step 2: implement welding step, weld seam adopts little weldering amount multiple welding method to complete, as shown in Figure 3, the weldering amount average out to of all main structure weld seams has welded for five times, compensate lacing wire 6 interior compensation weld seam 10 and repay outward weld seam 11 also average out to weld for five times, the order at every turn welded is: a seam outside weld 12, b seam inside weld 13, weld seam 10 is compensated in c, otic placode outside weld 15, f external compensation weld seam 11 in otic placode inside weld 14, e in d, the outer otic placode outside weld 17 of the outer otic placode inside weld 16, h of g; K cleaning is polished, is detected a flaw and eliminate defect; Above-mentioned welding procedure a-k repeats the whole weldering amounts completing main structure weld seam for five times altogether, carries out the while that welding wanting two pieces to transport end cap with step, and the welding of every part transport end cap also wants symmetrical carrying out; Other non-master construction joints carry out after the 4th main structure weld seam has welded;
Step 3: transport end cap annealing steps, the transport end cap completing all welding still keeps back-to-back connection status, carries out annealing operation; After annealing operation terminates, excision lacing wire 9 and compensation lacing wire 6, complete whole welding sequence.
Claims (1)
1. a 1000MW generator unit stator transport end cap welding method, is characterized in that: take following scheme measure and step;
1) physical dimension Adjusted Option in advance: the diameter of bore size (2) of end plate (1) is increased 8mm, gabarit diameter dimension (3) increases 8mm;
2) Basic architecture Adjusted Option in advance during riveted joint: group increases 5mm apart from (4), and interior distance (5) increases 2mm;
3) riveting process and welding process follow these steps to and require to carry out:
Step one: riveting process, riveted joint weld width is 6-8mm, riveted joint fusion length 30-50mm, interval 200-300mm, by physical dimension in advance Adjusted Option size increase requirements rivet; Adopt supplemental support measure: adopt and compensate the auxiliary fixing left otic placode group (7) of lacing wire (6) and auris dextra plate group (8); Adopt two transport end cap methods of simultaneously welding, end cap is back-to-back to be connected to make two to transport with lacing wire (9);
Step 2: implement welding step, weld seam adopts little weldering amount multiple welding method to complete, the weldering amount average out to of all main structure weld seams has welded for five times, the interior compensation weld seam (10) of compensation lacing wire (6) and external compensation weld seam (11) also average out to have welded for five times, the order of each welding is: a) seam outside weld (12), b) seam inside weld (13), c) weld seam (10) is compensated in, d) otic placode inside weld (14) in, e) otic placode outside weld (15) in, f) external compensation weld seam (11), g) outer otic placode inside weld (16), h) outer otic placode outside weld (17), k) cleaning polishing, detect a flaw and eliminate defect, above-mentioned welding procedure a-k repeats the whole weldering amounts completing main structure weld seam for five times altogether, carries out the while that welding wanting two pieces to transport end cap with step, and the welding of every part transport end cap also wants symmetrical carrying out, other non-master construction joints carry out after the 4th main structure weld seam has welded,
Step 3: transport end cap annealing steps, the transport end cap completing all welding still keeps back-to-back connection status, carries out annealing operation; After annealing operation terminates, excision lacing wire (9) and compensation lacing wire (6), complete whole welding sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718417.1A CN104439744B (en) | 2014-12-01 | 2014-12-01 | 1000MW generator unit stator transport end cap welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718417.1A CN104439744B (en) | 2014-12-01 | 2014-12-01 | 1000MW generator unit stator transport end cap welding method |
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| Publication Number | Publication Date |
|---|---|
| CN104439744A true CN104439744A (en) | 2015-03-25 |
| CN104439744B CN104439744B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410718417.1A Active CN104439744B (en) | 2014-12-01 | 2014-12-01 | 1000MW generator unit stator transport end cap welding method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384958A (en) * | 1993-02-26 | 1995-01-31 | General Motors Corporation | Method of making a torque converter assembly |
| US20060071054A1 (en) * | 2004-09-30 | 2006-04-06 | Bolser David R | Aluminum end caps ultrasonically welded to end of aluminum tube |
| CN1887514A (en) * | 2006-07-17 | 2007-01-03 | 四川东风电机厂有限公司 | Process of welding flow passage cover plate and frame of through-flow generator set |
| CN101337297A (en) * | 2008-08-12 | 2009-01-07 | 上海汽车改装厂有限公司 | Welding method of oil-box body for concrete pump and cover board and welding device thereof |
| CN103203556A (en) * | 2013-04-03 | 2013-07-17 | 齐齐哈尔鑫拓金属铆焊有限责任公司 | Technology for assembling and welding upper center pans and lower cover plates of center frame of railway van truck |
-
2014
- 2014-12-01 CN CN201410718417.1A patent/CN104439744B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5384958A (en) * | 1993-02-26 | 1995-01-31 | General Motors Corporation | Method of making a torque converter assembly |
| US20060071054A1 (en) * | 2004-09-30 | 2006-04-06 | Bolser David R | Aluminum end caps ultrasonically welded to end of aluminum tube |
| CN1887514A (en) * | 2006-07-17 | 2007-01-03 | 四川东风电机厂有限公司 | Process of welding flow passage cover plate and frame of through-flow generator set |
| CN101337297A (en) * | 2008-08-12 | 2009-01-07 | 上海汽车改装厂有限公司 | Welding method of oil-box body for concrete pump and cover board and welding device thereof |
| CN103203556A (en) * | 2013-04-03 | 2013-07-17 | 齐齐哈尔鑫拓金属铆焊有限责任公司 | Technology for assembling and welding upper center pans and lower cover plates of center frame of railway van truck |
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| Publication number | Publication date |
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| CN104439744B (en) | 2016-08-24 |
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