CN110682929B - Vehicle side wall structure and rail vehicle - Google Patents
Vehicle side wall structure and rail vehicle Download PDFInfo
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- CN110682929B CN110682929B CN201910968986.4A CN201910968986A CN110682929B CN 110682929 B CN110682929 B CN 110682929B CN 201910968986 A CN201910968986 A CN 201910968986A CN 110682929 B CN110682929 B CN 110682929B
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- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 abstract description 60
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000003351 stiffener Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 208000035126 Facies Diseases 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/08—Sides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/043—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures connections between superstructure sub-units
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- Wood Science & Technology (AREA)
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- Body Structure For Vehicles (AREA)
Abstract
The invention relates to the technical field of rail vehicles, and discloses a vehicle side wall structure and a rail vehicle, which comprise: a sidewall body; and the stand columns are arranged at intervals along the length direction of the side wall body respectively, the cross section of each stand column is U-shaped, and the opening sides of the stand columns are integrally welded with the side wall body in a laser mode. This car body side wall structure has the advantage that welding strength is high and lightweight.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a vehicle side wall structure and a railway vehicle.
Background
The side wall is used as a main bearing part of the rail vehicle and is required to have higher strength, side window openings are usually arranged on the side wall, stress concentration is easily generated at the positions of the openings after the openings are formed, and therefore the side window is required to be reinforced at the position of the window, and the stress concentration is prevented.
The manufacturing material of the car body side wall of the traditional rail car is carbon steel material, and the section shape of the stand column on the existing side wall is generally cap-shaped, so that the weight of the side wall structure is heavier, and the traditional side wall structure can not meet the increasingly lightweight requirement of the rail car.
The side wall is used as a visual component with the largest exposed area, and needs to have a better appearance, otherwise, the aesthetic property of the whole vehicle is directly influenced. The side wall of the car body of the existing railway vehicle is welded by adopting arc welding, and the side walls of the car bodies manufactured by manufacturers for producing the railway vehicles are only different in welding modes of the upright columns, the cross beams and the side wall plates. The first way is to use resistance spot welding; the second mode is to increase the plug welding hole on stand and crossbeam for stand, crossbeam and side wall board adopt the plug welding to be connected. Although the welding deformation of the side wall plate can be reduced to a certain extent by the two welding modes with the side wall plate, the appearance still cannot achieve the expected effect, meanwhile, the welding strength of resistance spot welding and plug welding is relatively low, the side wall of the car body needs to be leveled after the assembly welding of the rail car is completed, the leveling time is long, the effect is not good, and the production period of the rail car is easy to be long.
Disclosure of Invention
Technical problem to be solved
The present invention is directed to solving at least one of the problems of the prior art. To this end, the present invention provides a vehicle body side wall structure having advantages of light weight and high strength.
The invention further provides the railway vehicle.
(II) technical scheme
In order to solve the above-described technical problem, according to a first aspect of the present invention, there is provided a vehicle body side wall structure including: a sidewall body; and the stand columns are arranged at intervals along the length direction of the side wall body respectively, the cross section of each stand column is U-shaped, and the opening sides of the stand columns are integrally welded with the side wall body in a laser mode.
The side wall structure of the vehicle body further comprises a plurality of cross beams, each cross beam is respectively arranged along the vertical direction of the side wall body in an interval mode, and each cross beam is integrated with the side wall body in a laser welding mode.
Wherein each of the cross beams includes a horizontal portion and a vertical portion connected to a long edge of one of the sides of the horizontal portion and extending upward.
The cross beams and the stand columns are arranged vertically to form a supporting structure, and a plurality of clamping grooves with openings facing outwards and used for mounting the cross beams are longitudinally arranged on the outer side surfaces of the stand columns at intervals.
The horizontal part of the cross beam is embedded in the clamping groove, and the inner side surface of the vertical part of the cross beam is welded with the corresponding outer side surface of the stand column into a whole.
And the parts of the cross beams, which are intersected with the upright posts, are welded into a whole by laser.
And a window is constructed on the side wall body and penetrates through the support structure.
An integral window reinforcing plate is embedded in the window, and the integral window reinforcing plate and the side wall body are welded into a whole.
The integral window reinforcing plate comprises a first side plate, a second side plate, a third side plate and a fourth side plate, wherein the first side plate and the second side plate are arranged oppositely, the third side plate and the fourth side plate are arranged oppositely, and the first side plate, the third side plate, the second side plate and the fourth side plate are connected into a whole through inner arc-shaped corner plates.
According to a second aspect of the invention, there is also provided a rail vehicle comprising a body side wall structure as described above.
(III) advantageous effects
Compared with the prior art, the side wall structure of the vehicle body provided by the invention has the following advantages:
this application is through making each stand all form into a whole with the mode that the side wall body adopted laser welding, adopt laser welding's mode, resistance spot welding or the vestige of plug welding can not appear in the outside of side wall body, simultaneously, because laser welding's heat input is little, can not cause the welding deformation of side wall body, follow-up rail vehicle assembly welding is accomplished the back and need not to carry out the leveling to the side wall body, from this, just promoted the holistic pleasing to the eye degree of side wall body widely, simultaneously, the manufacturing cycle of car side wall structure has also been shortened widely. In addition, because the laser welding mode is adopted, the overall structural strength of the side wall structure of the vehicle body is effectively improved, and under the condition, the thickness of the side wall body can be properly reduced, namely the thickness of the side wall body can be 3/4 of the thickness of the traditional side wall plate, so that the weight of the side wall body is reduced by 1/4. In addition, as the cross section of each upright post is U-like, compared with the traditional upright post with the hat-shaped cross section, the cross section of each upright post reduces the flanging at two sides, thereby greatly reducing the weight of the upright post. Specifically, the weight of each of the studs is reduced 1/3 compared to the weight of a conventional hat-section stud. It can be seen that the vehicle body side wall structure of this application has improved welding strength effectively through the mode that adopts laser welding, through the heat input volume when reducing the welding, alright in order to ensure the side wall plane degree of side wall body, simultaneously, has also shortened the manufacturing cycle of vehicle body side wall structure. The thickness of the side wall body is 3/4 of the traditional side wall plate, accordingly, the weight of the side wall body can be reduced by about 1/4 compared with the thickness of the traditional side wall plate, and the weight of each upright post is reduced by 1/3 compared with the weight of the traditional upright post with a hat-shaped section, so that the requirement of light weight is met.
Drawings
Fig. 1 is an overall structural view of a vehicle body side wall structure of an embodiment of the invention;
FIG. 2 is a schematic top view of a vehicle body side wall structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional structural view of the beam of FIG. 1;
FIG. 4 is a schematic side view of the column of FIG. 1;
FIG. 5 is a schematic view of a portion of the enlarged structure at A of FIG. 4;
FIG. 6 is a schematic view of the overall structure of the integrated window stiffener of FIG. 1;
fig. 7 is a cross-sectional structural view of the pillar of fig. 1.
Reference numerals:
1: a sidewall body; 11: a window; 2: a column; 21: an upper upright post; 22: a lower upright post; 3: a cross beam; 31: a horizontal portion; 32: a vertical portion; 33: a left side cross beam; 34: a right side cross member; 4: a card slot; 5: an integral window stiffener; 51: a first side plate; 52: a second side plate; 53: a third side plate; 54: a fourth side plate; 6: an inner arc angle plate.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1 to 7, the vehicle body sidewall structure is schematically shown to include a sidewall body 1 and a pillar 2.
In the embodiment of the present application, each of the pillars 2 is disposed at intervals along the length direction (the left and right direction shown in fig. 1) of the sidewall body 1, the cross-sectional shape of each of the pillars 2 is U-like, and the opening side of each of the pillars 2 is integrally laser-welded with the sidewall body 1. The pillar 2 includes a left side plate, an outer side plate, and a right side plate, wherein the left side plate, the outer side plate, and the right side plate are sequentially connected to form a structure having a "U-like" cross section, and the "U-like" means that a connection portion between the left side plate and the outer side plate and a connection portion between the outer side plate and the right side plate are not limited to an arc-shaped connection portion, and may be a connection portion having an angular edge.
The terms "left side panel", "outer side panel" and "right side panel" are all described at the angles shown in fig. 1, wherein the "outer side panel" is disposed opposite the sidewall body 1.
Specifically, this application forms into a whole through making each stand 2 all adopt laser welding's mode with side wall body 1, adopts laser welding's mode, resistance spot welding or the vestige of plug welding can not appear in the outside of side wall body 1, simultaneously, because laser welding's heat input is little, can not cause side wall body 1's welding deformation, need not to carry out the leveling to side wall body 1 after follow-up rail vehicle assembly welding accomplishes, from this, just, the holistic pleasing to the eye degree of side wall body 1 has been promoted widely, simultaneously, the manufacturing cycle of vehicle side wall structure has also been shortened widely.
In addition, because the laser welding mode is adopted in the side wall structure, the overall structural strength of the side wall structure of the vehicle body is effectively improved, and in this case, the thickness of the side wall body 1 can be properly reduced, namely, the thickness of the side wall body 1 can be 3/4 of the thickness of the traditional side wall plate, so that the weight of the side wall body 1 is reduced by 1/4. In addition, because the cross section of each upright post 2 is U-like, compared with the traditional upright post with the hat-shaped cross section, the cross section of the upright post 2 reduces the flanging at two sides, thereby greatly reducing the weight of the upright post 2. In particular, the weight of each of the uprights 2 is reduced 1/3 compared to the weight of a conventional upright of hat-section type. It can be seen that the vehicle body side wall structure of the application effectively improves the welding strength by adopting a laser welding mode, can ensure the flatness of the side wall body 1 by reducing the heat input amount during welding, and simultaneously shortens the manufacturing period of the vehicle body side wall structure. The thickness of the side wall body 1 is 3/4 of the traditional side wall plate, accordingly, the weight of the side wall body 1 can be reduced by about 1/4 compared with the thickness of the traditional side wall plate, and the weight of each upright post 2 is reduced by 1/3 compared with the weight of the traditional upright post with a hat-shaped section, so as to meet the requirement of light weight.
As shown in fig. 1, in a preferred embodiment of the present application, the vehicle body side wall structure further includes a plurality of cross beams 3, each of the cross beams 3 is disposed at intervals along a vertical direction (an up-down direction shown in fig. 1) of the side wall body 1, and each of the cross beams 3 is integrally laser-welded with the side wall body 1. Specifically, the mode of laser welding is adopted, so that the trace of resistance spot welding or plug welding cannot occur on the outer side of the side wall body 1, and meanwhile, the welding deformation of the side wall body 1 cannot be caused due to small heat input of the laser welding.
As shown in fig. 1 and 3, in a preferred embodiment of the present application, each of the cross members 3 includes a horizontal portion 31 and a vertical portion 32 connected to a long side of one of the sides of the horizontal portion 31 and extending upward. Specifically, the cross member 3 includes the horizontal portion 31 and the vertical portion 32 connected to the long side of one side of the horizontal portion 31 and extending upward, so that the horizontal portion 31 and the vertical portion 32 together form a cross-sectional shape like an L, and the cross member 3 of the present application is greatly reduced in weight compared to a conventional cross-sectional hat beam or a b-beam, and specifically, the weight of the cross member 3 is reduced by about 1/3 compared to the conventional cross-sectional hat beam or the b-beam.
As shown in fig. 1 to 5, in a preferred embodiment of the present application, each of the cross beams 3 is arranged perpendicular to each of the columns 2 to form a supporting structure, and a plurality of slots 4 having openings facing outward and used for mounting each of the cross beams 3 are provided on an outer side surface of each of the columns 2 at intervals along a longitudinal direction (i.e., an up-down direction shown in fig. 4). Specifically, this application is through making the mounting means who adopts the joint between this crossbeam 3 and the stand 2 to make things convenient for the installation of crossbeam 3 widely, compare in the mounting means that uses the bolt to fasten, shortened the installation time of this crossbeam 3 effectively, improved the installation effectiveness of this crossbeam 3.
It will be appreciated that the slot width of the slot 4 should be slightly larger than the thickness of the horizontal portion 31 of the cross member 3, and preferably the slot width of the slot 4 may be 1 mm to 2 mm larger than the wall thickness of the horizontal portion 31. Thus, the horizontal portion 31 can be easily inserted, and the horizontal portion 31 is prevented from being inserted too smoothly because the thickness of the horizontal portion 31 is larger than the width of the slot 4.
As shown in fig. 1 to 4, in a preferred embodiment of the present application, the horizontal portion 31 of the cross beam 3 is embedded in the slot 4, and the inner side surfaces of the vertical portions 32 of the cross beam 3 are welded to the outer side surfaces of the corresponding upright posts 2. Specifically, in order to firmly clamp the horizontal portion 31 of the cross beam 3 in the clamping groove 4, the horizontal portion 31 and the inner wall of the clamping groove 4 may be fixedly connected by laser welding.
In addition, the vertical portion 32 and the upright 2 may be fixedly connected by laser welding. By adopting the laser welding mode, the integral structural strength of the vehicle side wall structure is improved, and meanwhile, the heat input quantity of laser is small, so that the welding deformation condition cannot occur, and the integral attractiveness of the vehicle side wall structure is effectively ensured.
It should be noted that, based on the reduction of the thickness of the side wall body 1 and the optimization of the cross-sectional structures of the cross beams 3 and the columns 2, the weight of the side wall body 1 is greatly reduced, so that the weight of the whole vehicle side wall structure is reduced by about 1/3 compared with the weight of the conventional side wall plate.
In a preferred embodiment of the present application, the portions of the cross beams 3 intersecting the columns 2 are welded together by laser. It should be noted that, by adopting the laser welding method, the welding strength between each cross beam 3 and each upright post 2 can be effectively improved, thereby ensuring the overall structural strength of the side wall structure of the vehicle body.
In a preferred embodiment of the present application, as shown in fig. 1, a window 11 is formed in the sidewall body 1, and the window 11 penetrates through the support structure. It should be noted that by "the window 11 passes through the supporting structure" is meant that each beam 3 and each column 2 do not pass through the window 11, i.e. each beam 3 and each column 2 are arranged in a broken manner when meeting the window 11, i.e. the beam on the left side of the window 11 is a left beam 33, and the beam on the right side of the window 11 is a right beam 34.
The pillar disposed above the window 11 is an upper pillar 21, and the pillar disposed below the window 11 is a lower pillar. It should be noted that the terms "upper", "lower", "left", and "right" are described with respect to the orientation shown in fig. 1.
As shown in fig. 1 and 6, an integral window reinforcement plate 5 is embedded in the window 11, and the integral window reinforcement plate 5 and the sidewall body 1 are welded together. Specifically, the stress concentration point of whole side wall body 1 is all in four fillet positions of window 11, for increasing the regional intensity of window 11, is equipped with integral window stiffening plate 5 at the embedded window 11 that is equipped with, and this integral window stiffening plate 5 is a monoblock structure, and it is as an organic whole with the marginal facies laminating back of window 11, can adopt laser welding's mode welding.
It should be noted that the integral window stiffening plate 5 of the present application can be applied to other windows having the same size, thereby improving the universality of the integral window stiffening plate 5, achieving the purpose of saving materials and saving economic cost.
In a preferred embodiment of the present application, in order to further optimize the integral window stiffener 5 in the above technical solution, on the basis of the above technical solution, the integral window stiffener 5 includes a first side plate 51 and a second side plate 52 which are oppositely arranged, and a third side plate 53 and a fourth side plate 54 which are oppositely arranged, and the first side plate 51, the third side plate 53, the second side plate 52 and the fourth side plate 54 are connected into a whole through an inner arc-shaped corner plate 6. It should be noted that the first side plate 51, the second side plate 52, the third side plate 53, the fourth side plate 54 and the inner arc-shaped angle plate 6 can be welded together by laser welding or the first side plate 51, the second side plate 52, the third side plate 53, the fourth side plate 54 and the inner arc-shaped angle plate 6 are integrally manufactured.
As shown in fig. 1, the first side plate 51 is a left side plate, the second side plate 52 is a right side plate, the third side plate 53 is an upper side plate, and the fourth side plate 54 is a lower side plate.
According to a second aspect of the invention, there is also provided a rail vehicle comprising a body side wall structure as described above.
To sum up, this application forms into a whole through the mode that makes each stand 2 all adopt laser welding with side wall body 1, adopts laser welding's mode, resistance spot welding or the vestige of plug welding can not appear in side wall body 1's the outside, and simultaneously, because laser welding's heat input is little, can not cause side wall body 1's welding deformation, need not to carry out the leveling to side wall body 1 after follow-up rail vehicle assembly welding accomplishes, from this, just promoted side wall body 1 holistic pleasing to the eye degree widely, simultaneously, the manufacturing cycle of vehicle side wall structure has also been shortened widely.
In addition, because the laser welding mode is adopted in the side wall structure, the overall structural strength of the side wall structure of the vehicle body is effectively improved, and in this case, the thickness of the side wall body 1 can be properly reduced, namely, the thickness of the side wall body 1 can be 3/4 of the thickness of the traditional side wall plate, so that the weight of the side wall body 1 is reduced by 1/4. In addition, because the cross section of each upright post 2 is U-like, compared with the traditional upright post with the hat-shaped cross section, the cross section of the upright post 2 reduces the flanging at two sides, thereby greatly reducing the weight of the upright post 2. In particular, the weight of each of the uprights 2 is reduced 1/3 compared to the weight of a conventional upright of hat-section type. It can be seen that the vehicle body side wall structure of the application effectively improves the welding strength by adopting a laser welding mode, can ensure the flatness of the side wall body 1 by reducing the heat input amount during welding, and simultaneously shortens the manufacturing period of the vehicle body side wall structure. The thickness of the side wall body 1 is 3/4 of the traditional side wall plate, accordingly, the weight of the side wall body 1 can be reduced by about 1/4 compared with the thickness of the traditional side wall plate, and the weight of each upright post 2 is reduced by 1/3 compared with the weight of the traditional upright post with a hat-shaped section, so as to meet the requirement of light weight.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A vehicle body side wall structure, comprising:
a sidewall body; and
the side wall body is provided with a side wall opening, and the side wall opening is provided with a plurality of stand columns which are arranged at intervals along the length direction of the side wall body; the upright column comprises a left side plate, an outer side plate and a right side plate, wherein the left side plate, the outer side plate and the right side plate are sequentially connected to form a structure with a U-shaped section, and the outer side plate and the side wall body are oppositely arranged;
the side wall structure of the vehicle body further comprises a plurality of cross beams, and each cross beam comprises a horizontal part and a vertical part which is connected with the long edge of one side of the horizontal part and extends upwards;
each cross beam and each upright post are vertically arranged to form a supporting structure, and a plurality of clamping grooves with openings facing outwards and used for mounting each cross beam are longitudinally arranged on the outer side surface of each upright post at intervals;
the horizontal part of the cross beam is embedded in the clamping groove, and the inner side surface of the vertical part of the cross beam is welded with the outer side surface of the corresponding upright post into a whole;
the cross parts of the cross beams and the upright columns are welded into a whole by laser;
a window is formed in the side wall body and penetrates through the supporting structure; an integral window reinforcing plate is embedded in the window and is welded with the side wall body into a whole;
the integral window reinforcing plate comprises a first side plate, a second side plate, a third side plate and a fourth side plate which are oppositely arranged, and the first side plate, the third side plate, the second side plate and the fourth side plate are connected into a whole through inner arc-shaped corner plates.
2. The vehicle body side wall structure according to claim 1, wherein each of the cross members is spaced apart from each other in a vertical direction of the side wall body, and each of the cross members is integrally laser-welded to the side wall body.
3. A rail vehicle comprising the vehicle body side wall structure of claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968986.4A CN110682929B (en) | 2019-10-12 | 2019-10-12 | Vehicle side wall structure and rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910968986.4A CN110682929B (en) | 2019-10-12 | 2019-10-12 | Vehicle side wall structure and rail vehicle |
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| CN110682929A CN110682929A (en) | 2020-01-14 |
| CN110682929B true CN110682929B (en) | 2020-10-30 |
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| CN103025596A (en) * | 2010-04-09 | 2013-04-03 | 庞巴迪运输有限公司 | Outer wall for a railway vehicle body and method for producing same |
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