CN111942472A - Front longitudinal beam assembly with high strength - Google Patents
Front longitudinal beam assembly with high strength Download PDFInfo
- Publication number
- CN111942472A CN111942472A CN202010855525.9A CN202010855525A CN111942472A CN 111942472 A CN111942472 A CN 111942472A CN 202010855525 A CN202010855525 A CN 202010855525A CN 111942472 A CN111942472 A CN 111942472A
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- inner plate
- longitudinal beam
- front longitudinal
- inner panel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a high-strength front longitudinal beam assembly, which comprises a front longitudinal beam formed by welding a front longitudinal beam inner plate and a front longitudinal beam outer plate, wherein the front longitudinal beam is welded on a front wall side inner plate; the first inner plate and the second inner plate respectively correspond to the crumple zone and the safety zone of the front longitudinal beam. By adopting the invention, the front longitudinal beam inner plate is divided into at least two sections along the length direction, so that the size of the front longitudinal beam part made of high-strength material to be processed is reduced, and the part can be conveniently processed and formed; in addition, the first inner plate and the second inner plate with different strengths can be obtained through different materials or different heat treatment modes; the first inner plate is located in the crumple zone of the front longitudinal beam, and the second inner plate is located in the safety zone of the front longitudinal beam, so that the requirements on the structural strength of the first inner plate and the second inner plate are different, and when the first inner plate and the second inner plate are divided into two different parts, the processing is convenient, and the processing cost is reduced.
Description
Technical Field
The invention relates to a front longitudinal beam, in particular to a high-strength front longitudinal beam assembly.
Background
With the continuous improvement of the requirements of the safety performance regulations of the automobiles, especially in the application of the bodies of the electric automobiles, the requirements on the performance of the front longitudinal beams of the bodies are higher and higher due to the improvement of the whole quality of the electric automobiles. In the existing frame structure, a front longitudinal beam structure is provided, wherein a front longitudinal beam inner plate and a front longitudinal beam outer plate are in Y-direction lap joint to form a closed cavity, and the middle rear part of the front longitudinal beam inner plate and the front longitudinal beam outer plate is bent towards the outer side of a vehicle body. The front longitudinal beam inner plate and the front longitudinal beam outer plate are directly connected with the front side plate, so that a main force transmission path of the side edge of the front frame is formed. In the application of electric motor car, because whole car quality promotes, there is higher requirement to the intensity of front longitudinal structure, for thousand ancient ways security and lightweight, often adopt the material of superhigh intensity to make front longitudinal, but the material of high strength exists and is difficult to process, the problem that the processing cost is high.
Disclosure of Invention
The invention aims to: the front longitudinal beam assembly is convenient to process and high in strength meeting the requirement.
In order to achieve the above purpose, the invention provides the following technical scheme:
a high-strength front longitudinal beam assembly comprises a front longitudinal beam formed by welding a front longitudinal beam inner plate and a front longitudinal beam outer plate, wherein the front longitudinal beam is welded on a front wall side inner plate, the front longitudinal beam inner plate is formed by welding at least two sections of a first inner plate and a second inner plate in the length direction, and the second inner plate is welded on the front wall side inner plate; the first inner plate and the second inner plate respectively correspond to the crumple zone and the safety zone of the front longitudinal beam.
According to the invention adopting the technical scheme, the front longitudinal beam inner plate is divided into at least two sections along the length direction, so that the size of a front longitudinal beam part made of a high-strength material to be processed is reduced, and the part is convenient to process and form; in addition, the strength of the first inner plate and the second inner plate can be set according to the distribution positions and the functional requirements of the first inner plate and the second inner plate, and the first inner plate and the second inner plate with different strengths can be obtained through different materials or different heat treatment modes; the first inner plate is located the crumple zone of front longitudinal beam, and the second inner plate is located the safety zone of front longitudinal beam, consequently requires differently to the structural strength of the two, when being two different parts before welding, can process alone, improves convenient processing nature, reduces the processing cost.
Furthermore, an open hole structure is formed in the second inner plate, the second inner plate is in a Y-shaped structure, and the top ends of two Y-shaped branch parts are welded on the inner plate on the front wall side; and a third inner plate is welded in a V-shaped gap formed by the two Y-shaped branch parts, and the third inner plate is also welded on the inner plate on the front wall side. The welding edges of the second inner plate and the front wall side inner plate are longer, so that the second inner plate with high strength is difficult to process; the second inner plate is designed into a Y-shaped structure, the third inner plate is welded to play a role in connection, the second inner plate is convenient to process, and the structural strength of the second inner plate is guaranteed.
Further, a third inner panel forms a recessed feature on the front rail inner panel. The sunken characteristic has played the effect of strengthening third inner panel structural strength on the one hand, and on the other hand makes things convenient for laying of passenger's foot.
Further, the strength of the second inner panel is not less than that of the third inner panel. The second inner panel is in the safety zone of the front longitudinal beam and needs sufficient strength to reduce deformation after collision, and the force applied to the third inner panel is small, so that the strength does not exceed the strength of the second inner panel and meets the requirement.
Further, the second inner panel is made of ultra-high strength hot formed steel and the third inner panel is made of high strength steel. And materials are reasonably selected, so that the deformation of the second inner plate after collision is reduced, and the stability of the front longitudinal beam is enhanced.
Furthermore, the first inner plate is provided with a collapse rib, and the position of the front longitudinal beam outer plate corresponding to the first inner plate is also provided with the collapse rib. The first inner plate is a crumple zone of the front longitudinal beam, deforms when being collided so as to absorb collision energy, and is provided with a crumple rib so as to facilitate the deformation of the crumple zone.
Further, the first inner panel is made of medium strength steel. The strength requirement of the first inner plate is met while the medium-strength steel is convenient to collapse and deform.
Furthermore, the section of the front longitudinal beam inner plate is of a U-shaped structure, the front longitudinal beam outer plate is welded at the U-shaped opening end of the front longitudinal beam inner plate, and the front longitudinal beam is of a structure with openings at two ends. The two ends of the opening facilitate the welding of the front longitudinal beam.
Further, a reinforcing piece is welded on the inner side of the U-shaped structure of the front longitudinal beam inner plate. The reinforcement reinforces the structural strength of the front side rail inner panel.
Further, the reinforcement is formed by bending the sheet metal part, and the reinforcement is welded on the second inner plate. The second inner panel is located in a safety zone of the front longitudinal beam and needs to have sufficient strength to reduce deformation after collision, and the reinforcing piece can enhance the structural strength of the second inner panel and enhance the stability of the second inner panel.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: the front longitudinal beam inner plate is divided into at least two sections along the length direction, so that the size of a front longitudinal beam part made of a high-strength material to be processed is reduced, and the part can be conveniently processed and formed; in addition, the strength of the first inner plate and the second inner plate can be set according to the distribution and the functional requirements of the first inner plate and the second inner plate at the positions, and the first inner plate and the second inner plate with different strengths can be obtained through different materials or different heat treatment modes; the first inner plate is located in the crumple zone of the front longitudinal beam, and the second inner plate is located in the safety zone of the front longitudinal beam, so that the requirements on the structural strength of the first inner plate and the second inner plate are different, and when the first inner plate and the second inner plate are divided into two different parts, the processing is convenient, and the processing cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a structural view showing a high-strength front side member assembly of the present invention.
Fig. 2 shows an exploded view of fig. 1.
Wherein the figures include the following reference numerals:
1, a front longitudinal beam outer plate; 2, front wall side inner plate; 3 a first inner panel; 4 a second inner panel; 5 a third inner plate; 6 a reinforcing element.
Detailed Description
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, a high-strength front longitudinal beam assembly includes a front longitudinal beam formed by welding a front longitudinal beam inner plate and a front longitudinal beam outer plate 1, wherein the front longitudinal beam is welded on a front wall side inner plate 2, the front longitudinal beam inner plate is formed by welding at least two sections of a first inner plate 3 and a second inner plate 4 in the length direction, and the second inner plate 4 is welded on the front wall side inner plate 2; the first inner panel 3 and the second inner panel 4 correspond to a crush zone and a safety zone of the front side member, respectively.
Preferably, the second inner plate 4 is provided with an open hole structure, so that the second inner plate 4 is in a Y-shaped structure, and the top ends of two Y-shaped branch parts are welded on the inner plate 2 on the front wall side; a third inner plate 5 is welded in a V-shaped gap formed by the two Y-shaped branch parts, and the third inner plate 5 is also welded on the front wall side inner plate 2.
Preferably, the third inner panel 5 forms a recessed feature on the front rail inner panel.
Preferably, the strength of the second inner panel 4 is not less than that of the third inner panel 5.
Preferably, the second inner panel 4 is made of ultra-high strength hot formed steel, and the third inner panel 5 is made of high strength steel.
Preferably, the first inner plate 3 is provided with a crush rib, and the front side member outer plate 1 is also provided with a crush rib at a position corresponding to the first inner plate 3.
Preferably, the first inner panel 3 is made of medium strength steel.
Preferably, the cross section of the front longitudinal beam inner plate is in a U-shaped structure, the front longitudinal beam outer plate 1 is welded at the U-shaped opening end of the front longitudinal beam inner plate, and the front longitudinal beam is in a structure with openings at two ends.
Preferably, the reinforcement 6 is welded to the inside of the U-shaped structure of the front side rail inner panel.
Preferably, the reinforcing member 6 is formed by bending a sheet metal part, and the reinforcing member 6 is welded to the second inner panel 4.
Specifically, the first inner panel 3 is weaker than the second inner panel 4, and the second inner panel 4 may be made of BR1500 HS; the third inner panel 5 may be made of HC340LA or B340/590 DP; the first inner panel 2 may be made of B340/590DP or HC340 LA.
The front longitudinal beam is along keeping away from preceding enclose side inner panel 2's direction, and the cross sectional area reduces in proper order. The section area of the joint of the front longitudinal beam and the front wall side inner plate 2 is large, and the stability of the joint of the front longitudinal beam and the front wall side inner plate and the second inner plate 4 is improved; the cross section area of one side of the front longitudinal beam, which is far away from the front wall side inner plate 2, is small, the strength is relatively weak, and the effect of facilitating the deformation of the first inner plate 3 is also achieved.
Enclose 2 middle part evaginations of side inner panel before and protrusion end links to each other with the front longitudinal welding, before enclose and set up concave-convex structure on the side inner panel 2, play the effect of reinforcing intensity.
The reinforcing part 6 is formed by bending a sheet metal part, and the section of the reinforcing part is L-shaped; the main body of the reinforcing piece 6 is welded on the second inner plate; alternatively, the reinforcement 6 may be welded to both the second inner panel 4 and the third inner panel 5.
The welding sequence of each part is as follows: firstly, welding a first inner plate 3, a second inner plate 4 and a third inner plate 5 into a front longitudinal beam inner plate, and then welding a reinforcement 6 on the front longitudinal beam inner plate; and welding the front longitudinal beam inner plate and the front longitudinal beam outer plate together by the welding 1, and then welding the front longitudinal beam inner plate and the front wall side inner plate together by the welding 2.
The front wall side inner plate 2 can be made of ultra-high-strength hot formed steel, the front longitudinal beam outer plate 1 and the third inner plate 5 can be made of high-strength steel, the first inner plate 3 is made of medium-high-strength steel, and the second inner plate 4 is made of ultra-high-strength hot formed steel; this kind chooses the material of different intensity for use to different regions, can realize front longitudinal assembly crumple zone, safe district's segmentation regulation, when satisfying higher crashworthiness requirement, reduces the manufacturing degree of difficulty of part by a wide margin.
Here, the crumple zone is a front longitudinal beam section where the first inner panel 3 is located (when in collision, the first inner panel 3 serves as a second crumple zone, and the first crumple zone is often a bumper beam energy-absorbing box); the safe area is a front longitudinal beam section where the second inner plate 4 and the third inner plate 5 are located, and the front wall side inner plate 2.
The front longitudinal beam is provided with a larger bend along the length direction.
The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A high-strength front longitudinal beam assembly comprises a front longitudinal beam formed by welding a front longitudinal beam inner plate and a front longitudinal beam outer plate (1), wherein the front longitudinal beam is welded on a front wall side inner plate (2), and is characterized in that the front longitudinal beam inner plate is formed by welding at least two sections of a first inner plate (3) and a second inner plate (4) in the length direction, and the second inner plate (4) is welded on the front wall side inner plate (2); the first inner plate (3) and the second inner plate (4) correspond to a crumple zone and a safety zone of the front longitudinal beam respectively.
2. The high-strength front side rail assembly according to claim 1, wherein the second inner panel (4) is provided with an open hole structure, so that the second inner panel (4) is in a Y-shaped structure, and the top ends of two Y-shaped branch parts are welded on the front wall side inner panel (2); and a third inner plate (5) is welded in a V-shaped gap formed by the two Y-shaped branch parts, and the third inner plate (5) is also welded on the front wall side inner plate (2).
3. The high strength front rail assembly according to claim 2, wherein the third inner panel (5) forms a recessed feature on the front rail inner panel.
4. The high-strength front side rail assembly according to claim 2, wherein the second inner panel (4) has a strength not less than that of the third inner panel (5).
5. A high strength front rail assembly according to claim 2 or 4, wherein the second inner panel (4) is made of ultra high strength hot formed steel and the third inner panel (5) is made of high strength steel.
6. The front side rail assembly with high strength according to claim 1, wherein the first inner panel (3) is provided with a crush rib, and the front side rail outer panel (1) is provided with a crush rib at a position corresponding to the first inner panel (3).
7. A high strength front rail assembly according to claim 1 or 6, wherein the first inner panel (3) is made of medium strength steel.
8. The high-strength front side rail assembly according to claim 1, wherein the cross section of the front side rail inner panel is a U-shaped structure, the front side rail outer panel (1) is welded to the U-shaped open end of the front side rail inner panel, and the front side rail is formed into a structure with two open ends.
9. The high-strength front side rail assembly according to claim 8, wherein a reinforcement (6) is welded to an inside of the U-shaped structure of the front side rail inner panel.
10. The high-strength front longitudinal beam assembly according to claim 9, wherein the reinforcement (6) is formed by bending a sheet metal part, and the reinforcement (6) is welded to the second inner panel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855525.9A CN111942472A (en) | 2020-08-20 | 2020-08-20 | Front longitudinal beam assembly with high strength |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855525.9A CN111942472A (en) | 2020-08-20 | 2020-08-20 | Front longitudinal beam assembly with high strength |
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| Publication Number | Publication Date |
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| CN111942472A true CN111942472A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010855525.9A Pending CN111942472A (en) | 2020-08-20 | 2020-08-20 | Front longitudinal beam assembly with high strength |
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| CN (1) | CN111942472A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115402415A (en) * | 2022-07-20 | 2022-11-29 | 岚图汽车科技有限公司 | Preceding cabin and vehicle |
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| CN110758562A (en) * | 2019-11-11 | 2020-02-07 | 吴春涛 | Platform automobile body structure and have its platform vehicle |
| CN110843936A (en) * | 2019-11-29 | 2020-02-28 | 安徽江淮汽车集团股份有限公司 | Front longitudinal beam connecting structure of engine room |
| CN210139901U (en) * | 2019-03-07 | 2020-03-13 | 威马智慧出行科技（上海）有限公司 | Automobile front floor longitudinal beam structure and automobile |
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| CN201231787Y (en) * | 2008-06-27 | 2009-05-06 | 安徽江淮汽车股份有限公司 | Front longitudinal girder inner plate for sedan car |
| CN202728343U (en) * | 2012-08-21 | 2013-02-13 | 东风汽车公司 | Car body front longitudinal beam reinforcing structure |
| CN207826350U (en) * | 2018-01-24 | 2018-09-07 | 广州汽车集团股份有限公司 | Automobile front wall harden structure, automobile front wall structure and body of a motor car |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115402415A (en) * | 2022-07-20 | 2022-11-29 | 岚图汽车科技有限公司 | Preceding cabin and vehicle |
| CN115402415B (en) * | 2022-07-20 | 2024-04-16 | 岚图汽车科技有限公司 | Front engine room and vehicle |
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Application publication date: 20201117 |