CN109835359B - Aluminum-based composite material rail vehicle - Google Patents
Aluminum-based composite material rail vehicle Download PDFInfo
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- CN109835359B CN109835359B CN201910169987.2A CN201910169987A CN109835359B CN 109835359 B CN109835359 B CN 109835359B CN 201910169987 A CN201910169987 A CN 201910169987A CN 109835359 B CN109835359 B CN 109835359B
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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Abstract
The invention discloses an aluminum matrix composite material rail vehicle. The aluminum-based composite material rail vehicle comprises a vehicle body, wherein the vehicle body is a box body structure mainly formed by connecting an arc roof profile, an air conditioner plate profile, a side wall plate profile, an underframe floor profile, a left roof side beam, a right roof side beam, a left underframe side beam and a right underframe side beam; the side wall plate section is mainly formed by welding and connecting a side wall plate middle section and upper and lower side wall plate connecting sections, and the bottom frame floor section is mainly formed by welding and connecting a bottom frame floor middle section and left and right bottom frame floor connecting sections; the air conditioner plate middle section and/or the side wall plate middle section and/or the bottom frame floor middle section are/is a nano ceramic aluminum alloy section. The invention can realize further light weight of the vehicle body.
Description
Technical Field
The invention relates to an aluminum-based composite material rail vehicle, and belongs to the technical field of rail transit vehicles.
Background
With the development of modern science and technology, the requirements of rail train vehicles on light weight, vibration, sound insulation and other performances become more severe, and especially in non-tunnel sections in cities, the requirements on vehicle wheel track noise are higher. In the field of rail train body steel structures, research units and manufacturers are constantly trying to improve performance indexes by using new materials.
In recent years, carbon fiber vehicle body structures are a popular field of vehicle body weight reduction research. Patent application numbers CN201520712628.4, CN201611093476.X, CN201620863664.5 all relate to carbon fiber composite material automobile body structure, and carbon fiber itself has characteristics such as high specific strength, specific modulus, corrosion resistance are good, are one of main sources of automobile body lightweight material. However, carbon fibers are generally used as panels of a sandwich structure for a vehicle body, a core material made of a porous foam material is arranged between the panels, the panels and the core are generally connected by gluing, and the connection surface of the structure is easy to be sheared and peeled off after the structure is subjected to bending load or repeated vibration. The connection between the members adopting the sandwich structure usually adopts glue bonding or a mixed form of glue bonding, riveting or bolt connection and the like, is the weakest link of the whole vehicle body, and often has insufficient rigidity to resist excessive vibration. This weakness is avoided by using large-scale integral forming techniques, such as the integration of the roof and the side wall in the invention with application number CN201611096406, but the production cost is further increased sharply. In order to reduce the cost and the production difficulty, a carbon fiber structure or an aluminum plate + sandwich layer composite material sandwich structure is adopted at a local part with lower strength requirement by adopting the measures which can be taken, and the composite material sandwich structure is connected with a vehicle body framework structure by adopting bonding or bolts, for example, the utility model patent scheme with the application number of CN201420755293 is adopted, but the connecting part of the structure is still a weak point. In order to further reduce the amount of adhesive used between main structures of a vehicle body and improve the endurance reliability of the structure, EP1982827a2 patent adds connecting mechanisms on both sides of a sandwich structure, i.e., the sandwich structure and the connecting mechanisms are welded together, and the connecting mechanisms and other structures of the vehicle body are also welded together. However, the sandwich core and the face plate of the sandwich structure are in a layered form and are usually connected in an adhesive manner, complex load force is transmitted and borne at the joint surface of the sandwich core and the face plate, and the problems of durability and reliability are not thoroughly solved.
In addition, foamed aluminum is increasingly used in the field of rail vehicles due to its light weight, high strength, fire resistance, sound insulation, sound absorption, noise reduction, heat insulation and other functions. The main properties are as follows: the density is low (0.2 g/cm 3-0.8 g/cm 3); the void ratio is high; the load capacity is large; the sound absorption and sound insulation performance is excellent (the thickness is 30mm, and 30 dB-50 dB); the fire-proof performance is good because of no combustion; corrosion resistance, long service life and good vibration damping performance; compared with a wood board, the vibration can be reduced by one order of magnitude; compared with aluminum honeycomb plates, the density is lower, and the tensile strength is improved by one order of magnitude. However, at present, foamed aluminum is mainly applied to vehicles by using sandwich core materials with sandwich structures (such as structures shown in fig. 1 in the text of application of foamed aluminum to urban rail vehicles), sandwich cores and panels (carbon fibers, aluminum plates and the like) are generally connected in an adhesive manner and are in a layered form, complex load force needs to be transmitted and borne at the joint of the sandwich cores and the panels, and the problems of durability and reliability are not thoroughly solved.
In recent years, the preparation technology of in-situ nano ceramic particle reinforced aluminum-based composite materials (namely nano ceramic aluminum alloys, also called ceramic aluminum) has achieved breakthrough development, and the invention patent with the application number of CN201711114899.X breaks through the inversion relationship of strong plasticity through Orowan strengthening, fine grain strengthening, nano reinforcement toughening, dispersion strengthening of nano precipitated phases, damping effect and thinning and modification effect of rare earth, so as to obtain the aluminum-based composite materials with strong plasticity, impact resistance, fatigue resistance and extrusion molding. The invention patent with the application number of CN201810321256.0 discloses a method for realizing the dispersion distribution of nano particles by stirring through a stirring head of friction stir welding, which provides a better method for the connection between aluminum matrix composite material members. In summary, by adding the nano ceramic particles into the aluminum alloy, the obtained new material has high specific stiffness and specific modulus while maintaining the good performance of the original matrix, and has high strength and high plasticity, so that the new material brings a desire for further lightening the vehicle body. However, the further light weight of the car body often causes the section bar rib plate to become thin and the density to become small, and if the traditional arc welding is adopted in a large area, great difficulty is brought to the welding deformation control in the car body manufacturing process.
How to apply high-performance aluminum-based materials such as nano ceramic aluminum alloy, foamed aluminum and the like to a vehicle body to replace carbon fiber structures at certain positions, improve the strength, durability and reliability of the connection interface inside a structural member and among components, simultaneously enhance the light weight effect of the vehicle body, and improve the vibration reduction and noise reduction performance of the vehicle is the problem to be solved by the invention.
Disclosure of Invention
The invention aims to provide an aluminum-based composite material rail vehicle, which aims to solve the problems that:
1) the traditional aluminum alloy vehicle body is difficult to further lighten due to the limitation of the strength of the material.
2) After further light weight is realized by adopting a high-performance nano ceramic aluminum alloy material, welding deformation is difficult to control by adopting a traditional arc welding mode.
3) The friction stir welding process for large areas of the car body, especially for large parts, is not mature temporarily, and the existing tooling equipment for manufacturing the car body cannot be effectively utilized, so that the production period, the cost and the risk are greatly increased.
4) The foamed aluminum is mainly used as a sandwich material of a sandwich structure in a layered manner with a panel, and various complex load forces are transmitted and borne at the joint surface of the sandwich and the panel, so that the problems of durability and reliability exist, and the requirement on the service life of 30 years or more is difficult to meet under the harsh operating environment of a rail train.
In order to achieve the purpose, the invention adopts the technical scheme that:
an aluminum-based composite material rail vehicle comprises a vehicle body, wherein the vehicle body is a box body structure formed by connecting an arc roof profile, an air conditioner plate profile, a side wall plate profile, an underframe floor profile, a left roof side beam, a right roof side beam, a left underframe side beam and a right underframe side beam which extend longitudinally; the structure is characterized in that:
the air conditioner plate section is mainly formed by welding and connecting a longitudinally extending air conditioner plate middle section and a left and right longitudinally extending air conditioner plate connecting section, and the left and right ends of the air conditioner plate section are respectively welded and connected with corresponding roof side beams; the side wall plate section is mainly formed by welding and connecting a longitudinally extending side wall plate middle section and an upper longitudinally extending side wall plate connecting section and a lower longitudinally extending side wall plate connecting section, the upper end of the side wall plate section is welded and connected with a corresponding roof side beam, and the lower end of the side wall plate section is welded and connected with a corresponding underframe side beam; the underframe floor profile is mainly formed by welding and connecting longitudinally-extending underframe floor middle profiles and a left underframe floor connecting profile and a right underframe floor connecting profile, wherein the left end and the right end of the underframe floor profiles are respectively welded and connected with corresponding underframe boundary beams; the air conditioner plate middle section and/or the side wall plate middle section and/or the bottom frame floor middle section are/is a nano ceramic aluminum alloy section.
Therefore, the air conditioner plate section bar, the side wall plate section bar, the bottom frame floor section bar, the roof side beam and the bottom frame side beam are connected, and meanwhile, the nano ceramic aluminum alloy section bar is selected, so that the aim of light weight is further fulfilled on the premise that tooling equipment for manufacturing the existing vehicle body is effectively utilized, and the durability and the reliability of the vehicle are improved.
According to the embodiment of the invention, the invention can be further optimized, and the following is the technical scheme formed after optimization:
according to the embodiment of the invention, preferably, the end rib plate of the air conditioner plate middle section bar is connected with the end rib plate of the air conditioner plate connecting section bar through friction stir welding; and the end rib plate of the air conditioner plate section bar is connected with the roof side beam through arc welding.
According to the embodiment of the invention, preferably, the end rib plates of the side wall plate middle section bar and the end rib plates of the side wall plate connecting section bar are connected through friction stir welding; and the end rib plate of the side wall plate section bar is connected with the roof side beam through arc welding.
According to the embodiment of the invention, preferably, the end rib plate of the underframe floor middle profile and the end rib plate of the underframe floor connecting profile are connected by friction stir welding; and the end rib plate of the underframe floor profile is connected with the underframe boundary beam through arc welding.
The air conditioner plate middle section bar and/or the air conditioner plate connecting section bar and/or the side wall plate middle section bar and/or the side wall plate connecting section bar and/or the bottom frame floor middle section bar and/or the bottom frame floor connecting section bar are provided with section bar cavities; preferably, the cavity of the profile is filled with foamed aluminum.
Common fillers in the existing underframe floor profiles are materials such as melamine soundproof cotton and fireproof rock wool, and in the service life cycle of a vehicle, if the profiles are partially gapped or not sealed, the materials can gradually absorb moisture in the air, so that the weight of the vehicle is heavier, and the soundproof effect is weakened. And vibration in the running process of the vehicle can cause part of materials to be cracked, and the sound insulation effect is lost. Therefore, the two ends of the hollow cavity of the section bar are provided with fixing plates for fixing with the foamed aluminum, or the foamed aluminum is filled into the hollow cavity of the section bar to form a brazing layer for fixing with the inner wall of the section bar.
In order to realize better connection and improve the integral bearing capacity, durability and reliability of the vehicle body, the air conditioner plate connecting section bar is provided with a lap joint part which extends towards the roof side rail and is lapped with the roof side rail; and/or the side wall board connecting section bar is provided with a lapping part which extends towards the roof side beam and is lapped with the roof side beam; and/or the underframe floor connecting section bar is provided with a lap joint part which extends towards the underframe boundary beam and is lapped with the underframe boundary beam. Similarly, the roof side rail has a lap joint portion extending toward the air conditioner panel connection section and overlapping the air conditioner panel connection section; and/or the roof side rail is provided with a lap joint part which extends towards the side wall board connecting section bar and is lapped with the side wall board connecting section bar; and/or the underframe edge beam is provided with a lap joint part which extends towards the underframe floor connecting section bar and is lapped with the underframe floor connecting section bar.
Preferably, the air conditioner plate connecting section and/or the side wall plate connecting section are/is made of 6005A aluminum alloy.
Preferably, the lower part of the vehicle body is provided with an equipment suspension beam which is made of a nano ceramic aluminum alloy section; preferably, the equipment suspension beam is detachably fixed to the vehicle body by a fastener.
At present, skirt boards for sound insulation are not arranged on the two sides under the subway vehicle in China basically, special sound insulation devices are required to be arranged on the two sides of the track of the urban non-tunnel section, the engineering quantity is large,the cost is high. Therefore, the skirt board which is longitudinally arranged and extends downwards is connected to the bottom of the vehicle body, and the skirt board is used for shielding wheel track noise generated by a bogie; preferably, the apron board is filled with foamed aluminum; preferably, the top end of the apron board is detachably fixed on the vehicle body through a fastener; preferably, the apron board is made of a large hollow section extruded by nano ceramic aluminum alloy, and more preferably is made of nano TiB2Particle ceramic reinforced aluminum alloy, most preferably in-situ generated nano TiB2A particulate ceramic reinforced 6 series aluminum alloy. After the sound insulation skirtboard is adopted, the noise outside the automobile is 2-20dB lower than that of the traditional vehicle.
From this, the big long board of automobile body adopts nanometer ceramic aluminum alloy extrusion section bar and traditional aluminum alloy section bar composite construction, utilizes superior performance such as high strength, high rigidity, high damping, high temperature resistant of nanometer ceramic aluminum alloy new material, under the prerequisite that keeps current manufacturing tool equipment unchangeable, develops a novel automobile body, solves the further lightweight of automobile body and improves the problem of sound insulation damping performance. Meanwhile, a composite structure of the nano ceramic aluminum alloy section bar and the foamed aluminum is arranged, so that the problem of overlarge noise on two sides of the track is solved.
The aluminum matrix composite vehicle structure has the following characteristics:
1) the car body is of an overall bearing all-welded structure, the middle part of the large and long car body plate is a nano ceramic aluminum alloy extruded section, and connecting members made of traditional aluminum alloy sections are arranged on two sides of the large and long car body plate.
2) The connecting component of the large and long plate middle section bar nano ceramic aluminum alloy section bar and the two side traditional aluminum alloy section bars is connected in a friction stir welding mode, so that the welding deformation of a lightweight structure is reduced, and meanwhile, enough strength is ensured. The connection mode between the large and long plates and the vehicle body framework is kept unchanged, namely, arc welding is adopted.
2) The middle section of the large and long plate is made of aluminum alloy reinforced by nano ceramic particles, and preferably in-situ generated nano TiB2The 6005A aluminum alloy extruded section is particle-reinforced.
4) The nano ceramic aluminum alloy extruded section realizes light weight by reducing the distribution density and the plate thickness of the section rib plate of the section; and the wall thickness of the rib plate in the section bar is reduced, so that the sound insulation quantity of the section bar can be increased.
5) Foamed aluminum materials are filled in nano ceramic aluminum alloy sections such as air conditioner floors, underframe floors, skirtboards below underframe boundary beams on two sides of a car body, suspension beams of equipment below the car and the like, and are connected in a brazing mode, so that the foamed aluminum is prevented from rubbing against the inner wall of the section in the operation process.
By the innovative design of the rail vehicle structure and based on the advantages of the nano ceramic aluminum alloy and the foamed aluminum material, the aluminum-based composite material vehicle has the following effects or characteristics:
1) the nano ceramic aluminum alloy has low density, high specific strength and high specific rigidity, and the self weight of the aluminum alloy section for the aluminum-based composite material vehicle can be reduced by more than 10 percent on the basis of the traditional aluminum alloy vehicle body at present; the foamed aluminum density is about 75% of the density of the aluminum honeycomb. The foamed aluminum replaces the traditional aluminum honeycomb floor paved above the floor and the damping slurry for reducing noise on the lower surface of the floor, so that the weight of the vehicle can be reduced by more than 300 kg.
2) The damping performance of the nano ceramic aluminum alloy is 10 times that of the traditional aluminum alloy, the vibration and noise reduction performance of the vehicle is greatly improved, and passengers in the vehicle feel more comfortable and safe;
3) after the sound insulation skirtboard is adopted, the noise of the outside of the automobile is 2-20dB lower than that of the traditional automobile, and the automobile is suitable for passing through the interior of a city. The special sound insulation devices are prevented from being arranged on two sides of the track of the urban non-tunnel section, and the social cost is greatly reduced.
4) The nano ceramic aluminum alloy and the traditional aluminum alloy are connected in a friction stir welding mode, and the all-welded vehicle has the advantages of good sealing performance, reliability and the like of an all-welded vehicle body structure; meanwhile, the connection mode between the large parts of the vehicle body is kept unchanged, the existing tooling equipment is fully utilized, the manufacturing risk and the cost are low, and the new nano ceramic aluminum alloy material can be quickly applied in engineering.
5) The nano ceramic aluminum alloy profile has independent bearing capacity, the foamed aluminum filler mainly plays a sound absorption and vibration reduction function, the welding interface connection reliability of the nano ceramic aluminum alloy profile and the foamed aluminum filler is good, the structural risk is low, and the use of glue is completely avoided.
Drawings
FIG. 1 is a schematic diagram (cross-sectional view) of the structure of one embodiment of the present invention;
FIG. 2 is a schematic view of an undercarriage bogie area of the present invention;
FIG. 3 is a schematic view of the connection structure of the air conditioner floor section bar and the roof side rail of the invention;
FIG. 4 is a schematic view of the connection structure of the side wall panel section and the roof side rail of the present invention;
FIG. 5 is a schematic view of the connection structure of the underframe floor profiles and the underframe edge beams of the invention;
FIG. 6 is a schematic view of a skirt composite structure of the present invention;
FIG. 7 is a schematic view of the composite structure of the suspension beam of the apparatus of the present invention;
FIG. 8 is a schematic view of the aluminum foam fill of the present invention.
In the figure
1-car body, 11-arc roof profile, 12-air conditioner plate profile, 121-air conditioner plate middle profile, 122-air conditioner plate connecting profile, 13-roof side rail, 14-side wall plate profile, 141-side wall plate middle profile, 142-side wall plate connecting profile, 15-underframe side rail, 16-underframe floor profile, 161-underframe floor middle profile, 162-underframe floor connecting profile, 2-equipment hanging beam, 3-apron board, 4-air conditioner set, 5-under-car equipment, 6-bogie, 7-foamed aluminum, 8-brazing layer, 121a, 122a, 141a,142a, 161a, 162 a-friction stir welding joint end part, 122b, 142b, 162 b-arc welding joint end part rib plate, 121c, 122c, 141c, 142c, 161c, 162 c-section rib plate, 121p, 141p, 161 p-section cavity.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.
A rail vehicle made of aluminum matrix composite materials is shown in a structural section view of a vehicle in figure 1 and a schematic diagram of a bogie area of a chassis in figure 2 and at least comprises a vehicle body 1, an air conditioning unit 4, a bogie 6 and other systems.
The vehicle body 1 mainly comprises a box body structure which is composed of a large-length plate profile structure such as an arc roof profile 11, an air conditioner plate profile 12, a side wall plate profile 14, an underframe floor profile 16 and the like, and a main bearing beam such as a roof side beam 13, an underframe side beam 15 and the like which are longitudinally long.
And an equipment suspension beam 2 is arranged at the bottom of the vehicle body 1 and used for suspending an equipment 5 under the vehicle. Further, skirt panels 3 are provided on both sides of the bottom of the vehicle body for noise reduction.
The long and large plate-shaped members such as the air conditioning plate-shaped member 12, the side wall plate-shaped member 14, and the floor member 16 serve as necessary members for supporting the entire vehicle body, and also have a function of isolating noise and vibration generated from the external air conditioning unit 4, the under-vehicle device 5, and the like from the outside a to the inside B. The equipment suspension beam 2 is mainly used for the installation of important under-vehicle equipment 5, including active self-induced vibration sources, such as rotating electrical machine suspension equipment. The skirt board 3 is mainly used for shielding and absorbing wheel track noise generated by a bogie 6 and noise generated by other equipment in the running process of the vehicle, and the noise is transmitted from the lower part of the vehicle to the outer part A of the vehicle, or further transmitted from the outer part A of the vehicle to the inner part B of the vehicle through parts such as vehicle door windows, side wall board profiles 14 and the like. In order to enhance the vibration and noise reduction performance of the vehicle, the middle section bar of the large long plate section bar structure, the equipment suspension beam 2 and the apron plate 3 are all made of nano ceramic aluminum alloy sections with high damping performance, and meanwhile, the weight is further reduced by utilizing the high specific strength and high specific rigidity of the nano ceramic aluminum alloy.
The middle section of the large long plate section structure, the equipment suspension beam 2 and the apron plate 3 are large hollow section sections formed by extruding nano ceramic aluminum alloy, preferably nano TiB2 particle reinforced aluminum alloy, and preferably in-situ generated nano TiB2 particle reinforced 6XXX series aluminum alloy. The nano-particle reinforced aluminum matrix composite material generated in situ has the advantages that the nano-reinforcement particles are a thermodynamic stable phase which is formed by in situ nucleation and growth from an aluminum matrix through chemical reaction, so that the surface of the reinforcement body is free of pollution and interface reaction, the bonding strength is high, the specific strength and the specific modulus are high, the fatigue resistance is excellent, the heat resistance and the corrosion resistance are good, the nano-particle reinforced aluminum matrix composite material can be directly synthesized through a melt reaction method, and the cost is greatly reduced.
The material performance of the 6005A aluminum alloy reinforced by the nano TiB2 particles for the vehicle body section can be controlled by adjusting the component content of the TiB2 to be 1-20%, the chemical components and the welding performance are similar to those of 6005A commonly used for vehicle bodies, the processing, manufacturing and using risks of the vehicle bodies can be reduced, and meanwhile, the strength and rigidity performance of the vehicle body are reasonably designed, so that the vehicle body section is suitable for the light weight requirement of a rail vehicle body. Specifically, the yield strength value of the 6005A aluminum alloy reinforced by the nano TiB2 particles used for the vehicle body section is preferably 250-400MPa, and the elastic modulus E is preferably 70-90 GPa.
The strength of the nano ceramic aluminum alloy is 215MPa higher than that of the traditional aluminum alloy, under the condition that the strength requirement of a vehicle body is not changed, the rib plates 121c, 141c and 161c of the arc roof section bar 11, the air conditioner plate section bar 12, the side wall plate section bar 14 and the underframe floor section bar 16 can be properly thinned and have reduced distribution density relative to the rib plates 122c, 142c and 162c of the traditional aluminum alloy, and the structural form of the rib plates of the section bars can be further optimized into a rectangular shape, so that the subsequent filling of a foamed aluminum 7 structure is facilitated; meanwhile, the weight of the section bars of the suspension beam 2 and the apron plate 3 is reduced by reducing the thickness of the rib plate, and the dead weight of the aluminum alloy section bar for the aluminum-based composite material vehicle can be reduced by more than 10 percent on the basis of the traditional aluminum alloy vehicle body.
Because the further light weight of the vehicle brings great influence to the welding deformation in the manufacturing process, and meanwhile, under the condition that the existing whole vehicle assembly welding tooling equipment is kept unchanged, the optimized objects of the invention mainly comprise two types: the large long plate profiles are arc roof profiles 11, air conditioner plate profiles 12, side wall plate profiles 14 and underframe floor profiles 16, and can be welded by Friction Stir Welding (FSW) before the assembly welding of large parts of the whole automobile body through FSW (FSW) as an advanced solid-phase welding method, the heat input quantity of the large long plate profiles is low, the strength of a welding joint is high, the welding deformation is small, and the large long plate profiles are an integral component which is formed by splicing a plurality of profiles into a good flatness state in an important means mode for solving the problem of welding deformation of a light automobile body. The other type is that the equipment suspension beam 2, the apron board 3 and other accessory parts of the vehicle are fixed on the vehicle body mainly through fasteners such as bolts and the like, and the problem of welding deformation during the assembly welding of the whole vehicle is not considered.
Fig. 3 is a schematic view of the connection structure of the air conditioner floor section bar and the roof side rail. The air conditioner plate section bar 12 is formed by splicing a friction stir welding bonding end rib plate 121a of the air conditioner plate middle section bar 121 and a friction stir welding bonding end rib plate 122a of the air conditioner plate connecting section bar 122 through FSW. The air-conditioning plate section 12 is arc-welded to the roof side rail 13 by arc-welding the joining end rib 122 b. The air conditioner plate middle section 121 is made of nano ceramic aluminum alloy, the air conditioner plate connecting section 122 is made of traditional 6005A aluminum alloy, the section rib plate 121c of the air conditioner plate middle section 121 can be 1.5mm thick, and the section rib plate 122c of the air conditioner plate connecting section 122 is generally 2mm thick. To further enhance the vibration and noise reduction effect, the profile cavity 121p may be filled with aluminum foam 7.
Fig. 4 is a schematic view of the connection structure of the side wall plate section bar and the roof side rail. The side wall plate profiles 14 are similar in structure to the connection of the underframe edge beams 15. The side wall plate section 14 is formed by splicing a friction stir welding bonding end rib plate 141a of the side wall plate middle section 141 and a friction stir welding bonding end rib plate 142a of the side wall plate connecting section 142 through FSW. The side wall plate section 14 is arc-welded to the roof side rail 13 by arc-welding the joining end rib 142 b. The side wall board middle section 141 is made of nano ceramic aluminum alloy, the side wall board connecting section 142 is made of traditional 6005A aluminum alloy, the section rib plate 141c of the side wall board middle section 141 can be 1.5mm thick, and the section rib plate 142c of the side wall board connecting section 142 is generally 2mm thick. To further enhance the vibration and noise reduction effect, the section bar cavity 141p may be filled with aluminum foam 7.
Fig. 5 is a schematic view of the connection structure of the underframe floor profile and the underframe edge beam. The underframe floor profile 16 is formed by splicing a friction stir welding joint end rib plate 161a of the underframe floor intermediate profile 161 and a friction stir welding joint end rib plate 162a of the underframe floor connecting profile 162 by FSW. The underframe floor profile 16 is arc welded to the underframe edge beam 15 by arc welding the joint end rib 162 b. The underframe floor middle section 161 is made of nano ceramic aluminum alloy, the underframe floor connecting section 162 is made of traditional 6005A aluminum alloy, the section rib plate 161c of the underframe floor middle section 161 can be 1.5mm thick, and the section rib plate 162c of the underframe floor connecting section 162 is generally 2mm thick. To further enhance the vibration and noise reduction effect, the profile cavity 161p may be filled with aluminum foam 7.
In some embodiments, as shown in fig. 3 to 5, the air-conditioning panel connecting profile 122 has a lap portion extending toward the roof side rail 13 and overlapping the roof side rail 13. The side wall plate connecting section 142 has a lap portion extending toward the roof side rail 13 and overlapping the roof side rail 13. The underframe floor connecting profile 162 has a lap joint portion extending toward the underframe edge beam 15 and overlapping with the underframe edge beam 15. The roof side rail 13 has a lap portion extending toward the air conditioner panel connecting section 122 and overlapping the air conditioner panel connecting section 122. The roof side rail 13 has a lap joint portion extending toward the side wall panel connection section 142 and overlapping the side wall panel connection section 142. The underframe edge beam 15 has a lap joint portion extending toward the underframe floor connecting profile 162 and overlapping with the underframe floor connecting profile 162.
Figure 6 is a schematic view of a skirt composite structure. High damped foamed aluminium 7 is filled in 3 section bars of skirtboard, can improve the absorptivity of noise under the car, and skirtboard thickness sets up and is about 30mm, and the noise can reduce to be no less than 20dB outside the car, has greatly improved the peripheral environmental condition of route.
Fig. 7 is a schematic view of the composite structure of the suspension beam of the device. High-damping foamed aluminum 7 is filled in the section bar of the equipment suspension beam 2, so that the vibration of the equipment 5 under the vehicle can be greatly attenuated and transmitted to the vehicle body 1, and the comfort performance of the vehicle is improved. FIG. 8 is a schematic illustration of an aluminum foam brazing. The profile cavities 121p, 141p, 161p of the body profiles, in particular of the large length plate profiles, as well as the equipment suspension beams 2, the skirt 3 profile cavities can be filled with aluminium foam 7 in the form of closed cells. The foamed aluminum 7 can be fixed in the cavity of the section by adopting a mechanical mode of adding a fixing plate and the like to prevent relative sliding, and the foamed aluminum 7 can also be fixed with the section by forming a brazing layer 8 between the foamed aluminum 7 and the section through integrally heating the section after being filled in the cavity of the section. The preparation process comprises the following steps:
1) coating brazing filler metal on the inner wall in the cavity of the car body profile or the outer surface of the foamed aluminum 7;
2) the foamed aluminum 7 is plugged into the cavity of the section bar;
3) and (3) locally heating the position, which is correspondingly coated with the brazing filler metal, on the outer side of the section bar of the automobile body 1, raising the temperature to 300-450 degrees, melting the brazing filler metal, and covering the joint interface of the foamed aluminum 7 and the automobile body 1. Since the aluminum foam 7 is in the form of closed cells, the melt does not flow to intrude into the pores inside the aluminum foam 7 to cause a decrease in function.
4) And cooling, forming a brazing layer 8 on the outer surface of the foamed aluminum 7 and the inner wall of the section cavity of the vehicle body 1 and fixing.
The foregoing examples are set forth to illustrate the present invention more clearly and are not to be construed as limiting the scope of the invention, which is defined in the appended claims to which the invention pertains, as modified in all equivalent forms, by those skilled in the art after reading the present invention.
Claims (16)
1. An aluminum-based composite material rail vehicle comprises a vehicle body (1), wherein the vehicle body (1) is a box body structure which is mainly formed by connecting an arc roof profile (11), an air-conditioning plate profile (12), a side wall plate profile (14), an underframe floor profile (16), a left roof side beam (13) and a right underframe side beam (13) which longitudinally extend, and a left underframe side beam (15) and a right underframe side beam (15) which longitudinally extend; the method is characterized in that:
the air conditioner plate section bar (12) is mainly formed by welding and connecting a longitudinally extending air conditioner plate middle section bar (121) and a left and right longitudinally extending air conditioner plate connecting section bar (122), and the left and right ends of the air conditioner plate section bar (12) are respectively welded and connected with corresponding roof side beams (13);
the side wall plate section (14) is mainly formed by welding and connecting a longitudinally extending side wall plate middle section bar (141) and an upper longitudinally extending side wall plate connecting section bar (142) and a lower longitudinally extending side wall plate connecting section bar (142), the upper end of the side wall plate section bar (14) is welded and connected with a corresponding roof side beam (13), and the lower end of the side wall plate section bar (14) is welded and connected with a corresponding underframe side beam (15);
the underframe floor profile (16) is mainly formed by welding and connecting a longitudinally extending underframe floor middle profile (161) and a left longitudinally extending underframe floor connecting profile (162) and a right longitudinally extending underframe floor connecting profile (162), and the left end and the right end of the underframe floor profile (16) are respectively welded and connected with corresponding underframe boundary beams (15);
the air conditioner plate middle section bar (121) and/or the side wall plate middle section bar (141) and/or the underframe floor middle section bar (161) are nano ceramic aluminum alloy section bars.
2. The aluminum matrix composite rail vehicle according to claim 1, wherein end rib plates of the air conditioner plate intermediate section (121) are connected with end rib plates of the air conditioner plate connecting section (122) by friction stir welding; the end rib plate of the air conditioner plate section bar (12) is connected with the roof side beam (13) through arc welding; and/or
End rib plates of the side wall plate middle section (141) and end rib plates of the side wall plate connecting section (142) are connected through friction stir welding; the end rib plate of the side wall plate section bar (14) is connected with the roof side beam (13) through arc welding; and/or
The end rib plate of the underframe floor middle section (161) is connected with the end rib plate of the underframe floor connecting section (162) through friction stir welding; the end rib plate (162 b) of the underframe floor profile (16) is connected with the underframe boundary beam (15) through arc welding.
3. Aluminium based composite material rail vehicle according to claim 1, characterized in that the air conditioning panel intermediate profile (121) and/or the air conditioning panel connection profile (122) and/or the side wall panel intermediate profile (141) and/or the side wall panel connection profile (142) and/or the underframe floor intermediate profile (161) and/or the underframe floor connection profile (162) has a profile cavity.
4. The aluminum matrix composite rail vehicle according to claim 3, characterized in that the profile cavity is filled with foamed aluminum (7).
5. The aluminum matrix composite rail vehicle as claimed in claim 3, wherein the two ends of the section cavity are provided with fixing plates for fixing with the foamed aluminum (7), or the foamed aluminum (7) is filled into the section cavity and fixed with the inner wall of the section to form a brazing layer (8).
6. The aluminum-based composite rail vehicle according to any one of claims 1 to 5, characterized in that the air-conditioning panel connection profile (122) has a lap joint extending toward the roof side rail (13) and overlapping the roof side rail (13); and/or the side wall panel connecting profile (142) has a lap joint part extending towards the roof side rail (13) and overlapping with the roof side rail (13); and/or the underframe floor connecting profile (162) has a lap joint part which extends towards the underframe boundary beam (15) and is overlapped with the underframe boundary beam (15).
7. The aluminum-based composite rail vehicle according to any one of claims 1 to 5, characterized in that the roof side rail (13) has a lap joint portion extending toward the air-conditioning panel connection section (122) and overlapping with the air-conditioning panel connection section (122); and/or the roof side rail (13) has a lap joint extending toward the side wall panel connecting profile (142) and overlapping the side wall panel connecting profile (142); and/or the underframe edge beam (15) has a lap joint part which extends towards the underframe floor connecting section bar (162) and is overlapped with the underframe floor connecting section bar (162).
8. The aluminum matrix composite rail vehicle according to any one of claims 1 to 5, characterized in that the air conditioner panel connection profile (122) and/or the side wall panel connection profile (142) is/are of 6005A aluminum alloy.
9. The aluminum matrix composite rail vehicle according to any one of claims 1 to 5, characterized in that the lower part of the vehicle body (1) is provided with an equipment suspension beam (2), and the equipment suspension beam (2) is made of a nano ceramic aluminum alloy section.
10. The aluminium matrix composite rail vehicle according to claim 9, characterized in that the equipment suspension beam (2) is detachably fixed to the vehicle body (1) by means of fasteners.
11. The aluminum-based composite material rail vehicle according to any one of claims 1 to 5, wherein a skirt panel (3) longitudinally arranged and extending downward is attached to the bottom of the vehicle body (1), the skirt panel (3) being configured to shield a wheel-rail noise generated from a bogie (6).
12. The aluminum matrix composite rail vehicle according to claim 11, characterized in that the apron (3) is internally filled with foamed aluminum (7).
13. The aluminum-based composite rail vehicle according to claim 11, characterized in that the top end of the skirt (3) is detachably fixed to the vehicle body (1) by a fastener.
14. The aluminum matrix composite rail vehicle according to claim 11, characterized in that the skirt panels (3) are made of large hollow section profiles extruded from nano-ceramic aluminum alloy.
15. The aluminum-based composite rail vehicle according to claim 14, characterized in that the skirt panels (3) are made of nano-TiB2The particle ceramic is made of reinforced aluminum alloy.
16. The aluminum-based composite rail vehicle according to claim 15, characterized in that the skirt panels (3) employ nano-TiB generated in situ2A particulate ceramic reinforced 6 series aluminum alloy.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169987.2A CN109835359B (en) | 2019-03-07 | 2019-03-07 | Aluminum-based composite material rail vehicle |
| PCT/CN2020/076740 WO2020177589A1 (en) | 2019-03-07 | 2020-02-26 | Aluminum matrix composite railway vehicle |
| MX2021010763A MX2021010763A (en) | 2019-03-07 | 2020-02-26 | Aluminum matrix composite railway vehicle. |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910169987.2A CN109835359B (en) | 2019-03-07 | 2019-03-07 | Aluminum-based composite material rail vehicle |
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| Publication Number | Publication Date |
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| CN109835359A CN109835359A (en) | 2019-06-04 |
| CN109835359B true CN109835359B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910169987.2A Active CN109835359B (en) | 2019-03-07 | 2019-03-07 | Aluminum-based composite material rail vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN109835359B (en) |
| MX (1) | MX2021010763A (en) |
| WO (1) | WO2020177589A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109835359B (en) * | 2019-03-07 | 2020-04-28 | 中车株洲电力机车有限公司 | Aluminum-based composite material rail vehicle |
| CN113263254B (en) * | 2019-06-06 | 2022-04-08 | 中车株洲电力机车有限公司 | Method for welding section bar by using friction stir welding device |
| CN110548855A (en) * | 2019-09-18 | 2019-12-10 | 苏州镁馨科技有限公司 | shock-absorbing sound-insulating aluminum alloy material and preparation method thereof |
| CN110588693B (en) * | 2019-10-08 | 2021-07-16 | 中车株洲电力机车有限公司 | Railway vehicle sleeper beam, underframe and underframe welding method |
| WO2021135041A1 (en) * | 2020-01-02 | 2021-07-08 | 中车青岛四方机车车辆股份有限公司 | Assembly-type car body and rail vehicle |
| CN112026807B (en) * | 2020-08-24 | 2021-11-16 | 青岛中车四方轨道车辆有限公司 | Trolley bus body with guide rails |
| CN112249067B (en) * | 2020-09-24 | 2023-04-14 | 中车南京浦镇车辆有限公司 | Railway vehicle underframe boundary beam connecting structure suitable for drum-shaped vehicle body |
| CN113335321B (en) * | 2021-07-23 | 2024-05-28 | 中车南京浦镇车辆有限公司 | Aluminum alloy subway car body section bar capable of being matched and combined |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109835359B (en) * | 2019-03-07 | 2020-04-28 | 中车株洲电力机车有限公司 | Aluminum-based composite material rail vehicle |
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2019
- 2019-03-07 CN CN201910169987.2A patent/CN109835359B/en active Active
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2020
- 2020-02-26 WO PCT/CN2020/076740 patent/WO2020177589A1/en active Application Filing
- 2020-02-26 MX MX2021010763A patent/MX2021010763A/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109835359A (en) | 2019-06-04 |
| WO2020177589A1 (en) | 2020-09-10 |
| MX2021010763A (en) | 2021-09-28 |
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