CN106624479A - 100 % low-floor leading end of chassis multi-layer assembly welding technique - Google Patents
100 % low-floor leading end of chassis multi-layer assembly welding technique Download PDFInfo
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- CN106624479A CN106624479A CN201611033173.9A CN201611033173A CN106624479A CN 106624479 A CN106624479 A CN 106624479A CN 201611033173 A CN201611033173 A CN 201611033173A CN 106624479 A CN106624479 A CN 106624479A
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- welding
- weld seam
- welded
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Classifications
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- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
100 % low-floor leading end of chassis multi-layer assembly welding technique belongs to a technical field of railway vehicles manufacturing. The technique comprises the following steps: welding layering components of three layers in the condition of reverse placing; welding obverse placing weld lines of the whole leading end of chassis through an assembly weld in the condition of an obverse placing. The 100 % low-floor leading end of chassis multi-layer assembly welding technique has the advantages in that through a method of modularized resolution, the technique disperses and eliminates a welding transformation which effectively controls the transformation of the leading end of chassis in the welding and avoids adjusting repeatedly and reducing the intensity of the leading end of chassis; the size and appearance quality of the welded leading end of chassis are ensured; the scrape of the leading end of chassis is avoided, therefore, production efficiency is improved; the cost is saved; safety of vehicle is improved.
Description
Technical field
The invention belongs to rail vehicle manufacturing technology field, and in particular to a kind of 100% low-floor underframe front end multilayer group
Welding.
Background technology
Original stainless steel car body structure adopts slab and girder mostly, uses spot-welding technology, and 100% low-floor item
Mesh adopts European design standard, employs the form of casing plus connected structure, and full car is using slab and a large amount of arc welding processes.Be up to
Require to car body lightweight structure, large area reduces repeated hole, and postwelding geometrical variations are obvious.Underframe front-end architecture is more multiple
Miscellaneous, multiple layers of thick slabs is assembled, and original assembly welding technique is that integrally group to after the completion of, is supported using strut and welded again by workpiece,
Welding deformation is larger in welding process, and the welding stress of interlayer region cannot discharge, and corresponding welding deformation is also larger, due to
Group is welded into entirety, and frame structure affects the effect of adjusting, reprocesses laborious and DeGrain, and repeatedly adjusting is also reduced
The intensity of underframe front end, affects the security of vehicle, reduces production efficiency, increased the possibility of product rejection.
The content of the invention
For the welding deformation for solving prior art presence is big, repeatedly adjusting reduces underframe front end intensity, affect car
Security, the technical problem of low production efficiency, the present invention provides a kind of 100% low-floor underframe front end multilayer assembly welding technique.
The technical scheme that present invention solution technical problem is taken is as follows：
100% low-floor underframe front end multilayer assembly welding technique, it comprises the steps：
Step one, in anti-dress state the following group weldering ground floor component：According to design drawing, by flange, shroud upper panel, side muscle
Plate, column reinforcement seat, ground floor base plate, headwall column are grouping, and when group is to flange, are matched somebody with somebody using the support meanss at frock two ends
Close plummet make on flange mark center line it is consistent with the mark line on floor, side gusset is grouping with model, then right
Ground floor component of the group to after is welded, and welding Shi Cong centers cool down to both sides section gap formula welding in front one weld seam
Weld down one weld seam again afterwards, complete welding relief weld seam and be adequately cooled, so that its internal stress is fully discharged；
Step 2, in anti-dress state the following group weldering second layer component：According to design drawing, by second layer base plate, front end-plate,
Hitch mounting seat, installing plate, rear end-plate, second layer reinforcement gusset are grouping, ground floor base plate, second layer base plate, front end
Shrouding, rear end-plate formed body structure, box house by the they sup-port with its spot welding, during welding, a layer weld seam of first burn-oning
Hou Han lower floors weld seam, from center to both sides section gap formula welding, one weld seam under welding again after the cooling of front one weld seam, completes
Welding relief weld seam is adequately cooled, so that its internal stress is fully discharged；
Step 3, in anti-dress state the following group weldering third layer component：According to design drawing, third layer base plate, third layer are mended
Strong gusset, end reinforcement gusset, headwall column gusset are grouping, and are compressed using position of foetus compressing fixture, then to group
Third layer component to after is welded, and welding Shi Cong centers to both sides section gap formula is welded, after the cooling of front one weld seam
One weld seam is welded down again, complete after welding allows weld seam to be adequately cooled, welding will be completed under anti-dress state using overhead traveling crane
Underframe front end hangs out the anti-dress position of foetus；
Step 4, the underframe front end that completes will be welded under step 3 anti-dress state using overhead traveling crane it is hung to the formal dress position of foetus, is used in combination
Compressing fixture is compressed to underframe front end, and then the position that underframe front end cannot weld under anti-dress state is welded,
Welding Shi Cong centers complete welding and allow to both sides section gap formula welding, one weld seam under welding again after the cooling of front one weld seam
After weld seam is adequately cooled, the underframe front end that completes will be welded under formal dress state using overhead traveling crane, and to hang out the formal dress position of foetus standby.
The invention has the beneficial effects as follows：The technique is eliminated welding deformation dispersion by the method that modularization splits, effectively
The deformation controlled in the welding process of underframe front end, it is to avoid adjusting repeatedly reduces the intensity of underframe front end, it is ensured that before underframe
Size and presentation quality after the welding of end, it is to avoid the scrapping of underframe front end, improves production efficiency, has saved cost, improves
Vehicle safety.
Description of the drawings
Fig. 1 is the structural representation in the multilayer assembly welding technique of 100% low-floor underframe front end of the invention after the completion of the first step.
Fig. 2 is the structural representation in the multilayer assembly welding technique of 100% low-floor underframe front end of the invention after the completion of second step.
Fig. 3 is the structural representation in the multilayer assembly welding technique of 100% low-floor underframe front end of the invention after the completion of 3rd step.
Fig. 4 is the structural representation in the multilayer assembly welding technique of 100% low-floor underframe front end of the invention after the completion of 4th step.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further details with example.
The technique of the present invention is mainly effectively controlled underframe front end welding process in terms of structure and welding sequence two
The deformation of generation：In configuration aspects, quote the concept that modularization splits, by underframe front end steel construction along it is longitudinally split be three layers of platform
Stage structure, premised on the welding for ensureing each layer weld seam and component, by each component of underframe front end different module layers is divided into
In.In terms of welding sequence, using different welding sequences, make continuous weld into intermittent weld, weld seam and component can be reduced
The plastic deformation produced due to being heated；Or using different welding direction and order, reduce can local seam deformation or
Cancel out each other, so as to reach the purpose for reducing structural strain's；When weld seam is more than 1 meter, can divide using backstep sequence, in dividing
Section back welding, alternately wandering sequence, welding method, the weld seam to 0.5-1 rice moderate-lengths, using a point middle symmetric method.Welding sequence bag
Include：It is outer after in first, it is first horizontal/vertical after indulge/it is flat；The weld seam first burn-on in lower cover, welds afterwards the exposed weld seam on surface；Vertical weld
When intersecting with side seam, vertical weld is first welded；The equidirectional welding simultaneously of parallel weld seam, as far as possible using being symmetrically welded, weld seam divides
First welding line less side when cloth is asymmetric；Long weld seam more than 800mm takes backstep from the middle to both ends；Multilayer welding
When, the bead direction between each layer should be conversely, its joint should mutually stagger；Downhand weld is first welded in butt weld, and butt weld is welded afterwards,
Finally weld vertical butt weld；The weld seam for having groove is first welded, and is welded after the weld seam of square groove；Corner connection weld seam first welds fillet weld in the vertical position, welds afterwards
Fillet weld in the flat position；Elevation angle weld seam upset becomes fillet weld in the flat position.
As shown in Figures 1 to 4,100% low-floor underframe front end multilayer assembly welding technique of the invention specifically includes following step
Suddenly：
Step one, in anti-dress state the following group weldering ground floor component：According to design drawing, by flange 1, shroud upper panel 2, side muscle
Plate 3, column reinforcement seat 4, ground floor base plate 5, headwall column 6 are grouping, and when group is to flange, are filled using the support at frock two ends
Put coordinate plummet make on flange 1 mark center line it is consistent with the mark line on floor, side gusset 3 is grouping with model,
Then the ground floor component to group to after is welded, and welding Shi Cong centers are welded together to both sides section gap formula welding front
One weld seam is welded down again after seam cooling, is completed welding relief weld seam and is adequately cooled, so that its internal stress is obtained fully
Release, prevents welding deformation；
Step 2, in anti-dress state the following group weldering second layer component：According to design drawing, by second layer base plate 7, front end-plate
8th, hitch mounting seat 9, installing plate 10, rear end-plate 11, second layer reinforcement gusset 12 are grouping, the ground floor base plate 5, second layer
Base plate 7, front end-plate 8, rear end-plate 11 formed body structure, box house by the they sup-port with its spot welding, during welding,
First burn-on a layer weld seam Hou Han lower floors weld seam, from center to both sides section gap formula welding, under welding again after the cooling of front one weld seam
One weld seam, completes welding relief weld seam and is adequately cooled, so that its internal stress is fully discharged, prevents welding from becoming
Shape；
Step 3, in anti-dress state the following group weldering third layer component：According to design drawing, by third layer base plate 13, third layer
Reinforcement gusset 14, end reinforcement gusset 15, headwall column gusset 16 are grouping, and are compressed using position of foetus compressing fixture,
Then the third layer component to group to after is welded, and welding Shi Cong centers are welded together to both sides section gap formula welding front
One weld seam is welded down again after seam cooling, is completed after welding allows weld seam to be adequately cooled, will anti-weldering under dress state using overhead traveling crane
Connect the underframe front end for completing and hang out the anti-dress position of foetus；
Step 4, the underframe front end that completes will be welded under step 3 anti-dress state using overhead traveling crane it is hung to the formal dress position of foetus, is used in combination
Compressing fixture is compressed to underframe front end, and then the position A that underframe front end cannot weld under anti-dress state is welded,
Welding Shi Cong centers complete welding and allow to both sides section gap formula welding, one weld seam under welding again after the cooling of front one weld seam
After weld seam is adequately cooled, the underframe front end that completes will be welded under formal dress state using overhead traveling crane, and to hang out the formal dress position of foetus standby.
After the 100% low-floor underframe front end multilayer assembly welding technique using the present invention, before the light rail underframe of Shenyang Hun Nan 100%
The surface flatness at end is reached within 2mm, complies fully with size and presentation quality after the underframe front end welding of project demand.
Claims (1)
1.100% low-floor underframe front end multilayer assembly welding technique, it is characterised in that the technique comprises the steps：
Step one, in anti-dress state the following group weldering ground floor component：According to design drawing, by flange (1), shroud upper panel (2), side muscle
Plate (3), column reinforcement seat (4), ground floor base plate (5), headwall column (6) are grouping, when group is to flange, using frock two ends
Support meanss coordinate plummet make on flange (1) mark center line it is consistent with the mark line on floor, side gusset (3) uses sample
Plate is grouping, and then the ground floor component to group to after is welded, and welding Shi Cong centers to both sides section gap formula is welded,
One weld seam under welding again after the cooling of front one weld seam, completes welding relief weld seam and is adequately cooled, so that its inside should
Power is fully discharged；
Step 2, in anti-dress state the following group weldering second layer component：According to design drawing, by second layer base plate (7), front end-plate
(8), hitch mounting seat (9), installing plate (10), rear end-plate (11), second layer reinforcement gusset (12) are grouping, ground floor bottom
Plate (5), second layer base plate (7), front end-plate (8), rear end-plate (11) formed body structure, box house by with its spot welding
They sup-port, during welding, a layer weld seam Hou Han lower floors weld seam of first burn-oning, from center to both sides section gap formula welding, previous
One weld seam is welded down again after road weld seam cooling, is completed welding relief weld seam and is adequately cooled, so that its internal stress is obtained
Fully release；
Step 3, in anti-dress state the following group weldering third layer component：According to design drawing, third layer base plate (13), third layer are mended
Strong gusset (14), end reinforcement gusset (15), headwall column gusset (16) are grouping, and are pressed using position of foetus compressing fixture
Tightly, the third layer component then to group to after is welded, and welding Shi Cong centers to both sides section gap formula is welded, at first one
One weld seam is welded down again after weld seam cooling, is completed after welding allows weld seam to be adequately cooled, will instead under dress state using overhead traveling crane
The underframe front end that welding is completed hangs out the anti-dress position of foetus；
Step 4, the underframe front end that completes will be welded under step 3 anti-dress state using overhead traveling crane it is hung to the formal dress position of foetus, and with compressing
Fixture is compressed to underframe front end, and then the position that underframe front end cannot weld under anti-dress state is welded, welding
Shi Cong centers complete welding and allow weld seam to the welding of both sides section gaps formula, one weld seam under welding again after the cooling of front one weld seam
After being adequately cooled, the underframe front end that completes will be welded under formal dress state using overhead traveling crane, and to hang out the formal dress position of foetus standby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033173.9A CN106624479B (en) | 2016-11-22 | 2016-11-22 | 100% low-floor chassis front end multilayer assembly welding technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033173.9A CN106624479B (en) | 2016-11-22 | 2016-11-22 | 100% low-floor chassis front end multilayer assembly welding technique |
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| CN106624479A true CN106624479A (en) | 2017-05-10 |
| CN106624479B CN106624479B (en) | 2018-07-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107900546A (en) * | 2017-11-14 | 2018-04-13 | 中车长春轨道客车股份有限公司 | A kind of 100% low-floor tramcar steel underframe anti-deforming welding method |
| CN112171095A (en) * | 2020-09-24 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Shape and position deformation control welding method for underframe floor of motor train unit |
| CN113500320A (en) * | 2021-07-29 | 2021-10-15 | 中车长春轨道客车股份有限公司 | Assembly welding process for front-end module of underframe of corrugated plate plug-in type box structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900546A (en) * | 2017-11-14 | 2018-04-13 | 中车长春轨道客车股份有限公司 | A kind of 100% low-floor tramcar steel underframe anti-deforming welding method |
| CN107900546B (en) * | 2017-11-14 | 2020-05-22 | 中车长春轨道客车股份有限公司 | Deformation-preventing welding method for 100% low-floor tramcar underframe steel structure |
| CN112171095A (en) * | 2020-09-24 | 2021-01-05 | 中车长春轨道客车股份有限公司 | Shape and position deformation control welding method for underframe floor of motor train unit |
| CN112171095B (en) * | 2020-09-24 | 2021-12-14 | 中车长春轨道客车股份有限公司 | Shape and position deformation control welding method for underframe floor of motor train unit |
| CN113500320A (en) * | 2021-07-29 | 2021-10-15 | 中车长春轨道客车股份有限公司 | Assembly welding process for front-end module of underframe of corrugated plate plug-in type box structure |
| CN113500320B (en) * | 2021-07-29 | 2022-04-19 | 中车长春轨道客车股份有限公司 | Assembly welding process for front-end module of underframe of corrugated plate plug-in type box structure |
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| Publication number | Publication date |
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| CN106624479B (en) | 2018-07-03 |
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