CN111661154A - Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process - Google Patents
Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process Download PDFInfo
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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
- B62D21/02—Understructures, i.e. chassis frame on which a vehicle body may be mounted comprising longitudinally or transversely arranged frame members
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- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
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- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
本发明公开了一种车身前底板横梁与底板纵梁十字型结构,包括前底板横梁、前底板横梁接头、后底板横梁、后底板横梁接头和纵梁,还包括前底板横梁连接梁、后底板横梁外接头、门槛梁和门槛踏板,前底板横梁连接梁设于前底板横梁下方,前底板横梁连接梁分别与前底板横梁、前底板横梁接头和纵梁焊接,后底板横梁外接头与纵梁焊接,门槛梁前端与前底板横梁连接梁端部焊接,门槛梁后端与后底板横梁外接头焊接,门槛踏板分别与纵梁下端、前底板横梁连接梁下端、门槛梁下端焊接,通过前底板横梁连接梁横跨纵梁构成稳定可靠的十字型结构,从而实现在正面碰撞和侧面碰撞发生时,碰撞力能够进行侧向和正向传递,解决原先单一纵梁结构碰撞安全风险问题。
The invention discloses a cross-shaped structure of a front floor beam and a floor longitudinal beam of a vehicle body, comprising a front floor beam, a front floor beam joint, a rear floor beam, a rear floor beam joint and a longitudinal beam, as well as a front floor beam connecting beam, a rear floor The outer joint of the beam, the sill beam and the sill pedal, the connecting beam of the front floor beam is arranged under the beam of the front floor. Welding, the front end of the sill beam is welded with the end of the connecting beam of the front floor beam, the rear end of the sill beam is welded with the outer joint of the rear floor beam, and the sill pedal is welded with the lower end of the longitudinal beam, the lower end of the connecting beam of the front floor beam, and the lower end of the sill beam respectively, and connected through the front floor beam The beam spans the longitudinal beam to form a stable and reliable cross-shaped structure, so that in the event of a frontal collision and a side collision, the collision force can be transmitted laterally and forwardly, solving the collision safety risk problem of the original single longitudinal beam structure.
Description
技术领域technical field
本发明属于汽车车身结构技术领域,具体地说,本发明涉及一种车身前底板横梁与底板纵梁十字型结构及焊接工艺。The invention belongs to the technical field of automobile body structures, and in particular, the invention relates to a cross-shaped structure and a welding process of a front floor beam and a floor longitudinal beam of a body.
背景技术Background technique
现有大部分汽车车身下部结构框架设计中,发动机舱内的前纵梁向后延伸,贴合前挡板向后,同纵梁贯穿连接为整体。同时,在前纵梁后端,左右各增加斜撑式梁结构,分别实现和门槛梁以及中通道纵梁连接,进而实现车身前方传力分解为三条路径,提升前碰撞传力性能,并有效增加碰撞传力效果。这种车身框架结构,能有效改善前,侧碰传力,在现有车身开发中应用广泛。In most of the existing car body substructure frame designs, the front longitudinal beam in the engine compartment extends rearward, fits the front baffle, and is connected to the longitudinal beam as a whole. At the same time, at the rear end of the front longitudinal beam, diagonal braced beam structures are added to the left and right, respectively, to realize the connection with the sill beam and the middle channel longitudinal beam, so as to realize the decomposition of the force transmission in front of the body into three paths, improve the force transmission performance of the front collision, and effectively increase the collision. Transmission effect. This body frame structure can effectively improve the front and side impact force transmission, and is widely used in the development of the existing body.
对于发动机中置或驾乘人员下方布置较大零部件系统的车身结构,因为设计空间原因,发动机舱内的前纵梁向后延伸,同纵梁连接,实现整个车身下部纵梁贯穿连接。考虑车身下部前底板区域布置非车身系统,无车身设计空间,只能在驾驶员座椅前方车身下部区域增加前底板横梁,同两侧纵梁连接,构成“H”型结构,提高下部车身框架稳定性,而前底板横梁后方考虑布置动力电池,无结构设计空间,无法进行车身中通道梁类结构件设计,目前车身下部只能实现纵梁单一路径向后延伸,无法增加斜撑式梁结构,即无法实现增加多条传力路径结构,从目前结构上看,前底板横梁同纵梁连接,前底板横梁并没有横向连接到车身两侧门槛梁位置,只是通过门槛踏板连接纵梁和门槛梁,间距有250mm,过大,缺少横向传力路径。For the body structure with a large component system arranged in the middle of the engine or under the occupant, due to the design space, the front longitudinal beam in the engine compartment extends backward and is connected with the longitudinal beam to realize the penetration connection of the entire lower body longitudinal beam. Considering that non-body systems are arranged in the front floor area of the lower body, there is no room for body design. Only the front floor beams can be added in the lower body area in front of the driver's seat, which is connected with the longitudinal beams on both sides to form an "H"-shaped structure and improve the lower body frame. Stability, while the rear of the front floor beam is considered to arrange the power battery, there is no structural design space, and the design of the channel beam structure in the body cannot be carried out. At present, the lower part of the body can only achieve a single path of the longitudinal beam to extend backward, and the diagonal beam structure cannot be added. , that is, it is impossible to add multiple force transmission path structures. From the current structural point of view, the front floor beam is connected to the longitudinal beam, and the front floor beam is not laterally connected to the position of the sill beams on both sides of the body, but only through the sill pedal to connect the longitudinal beam and the sill. Beams, with a spacing of 250mm, are too large and lack a transverse force transmission path.
当发生侧面碰撞时,门槛踏板作为薄板类零件将完全压溃,侧向空间压缩严重,将直接威胁驾乘人员生命安全,使得此类车身结构车型的碰撞安全风险很高,不利于保证驾乘人员的安全空间。When a side collision occurs, the door sill pedal will be completely crushed as a thin-plate part, and the lateral space will be severely compressed, which will directly threaten the life safety of the driver and passenger, making the collision safety risk of this type of body structure vehicle high, which is not conducive to ensuring driving and riding. safe space for personnel.
发明内容SUMMARY OF THE INVENTION
本发明提供一种车身前底板横梁与底板纵梁十字型结构及焊接工艺,在现有布置空间下,充分考虑车身结构设计空间,在车身前部增加前底板横梁连接梁,连接到车身的纵梁,并通过前底板横梁接头和纵梁构成稳定可靠的十字型结构,从而实现在正面碰撞和侧面碰撞发生时,碰撞力能够进行侧向和正向传递,解决原先单一纵梁结构碰撞安全风险问题。The invention provides a cross-shaped structure and welding process of the front floor beam and the floor longitudinal beam of the vehicle body. Under the existing layout space, the design space of the body structure is fully considered, and the front floor beam connecting beam is added at the front of the vehicle body to connect to the longitudinal direction of the vehicle body. A stable and reliable cross-shaped structure is formed through the front floor beam joint and the longitudinal beam, so that the collision force can be transmitted laterally and forwardly in the event of a frontal collision and side collision, and the collision safety risk of the original single longitudinal beam structure can be solved. .
为了实现上述目的,本发明采取的技术方案为:一种车身前底板横梁与底板纵梁十字型结构,包括前底板横梁、前底板横梁接头、后底板横梁、后底板横梁接头和纵梁,所述前底板横梁两端通过前底板横梁接头与纵梁焊接,所述后底板横梁两端通过后底板横梁接头与纵梁焊接,还包括前底板横梁连接梁、后底板横梁外接头、门槛梁和门槛踏板,所述前底板横梁连接梁设于前底板横梁下方,且横向向外延伸,前底板横梁连接梁分别与前底板横梁、前底板横梁接头和纵梁焊接,所述后底板横梁外接头位于后底板横梁向外延伸方向,且与纵梁焊接,所述门槛梁前端与前底板横梁连接梁端部焊接,门槛梁后端与后底板横梁外接头焊接,所述门槛踏板分别与纵梁下端、前底板横梁连接梁下端、门槛梁下端焊接。In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a cross-shaped structure of a front floor beam and a floor longitudinal beam of a vehicle body, comprising a front floor beam, a front floor beam joint, a rear floor beam, a rear floor beam joint and a longitudinal beam. The two ends of the front floor beam are welded to the longitudinal beam through the front floor beam joint, the two ends of the rear floor beam are welded to the longitudinal beam through the rear floor beam joint, and also include the front floor beam connecting beam, the rear floor beam outer joint, the threshold beam and the The door sill pedal, the front floor beam connecting beam is arranged below the front floor beam, and extends laterally outward, the front floor beam connecting beam is welded with the front floor beam, the front floor beam joint and the longitudinal beam respectively, and the rear floor beam is externally connected. It is located in the outward extension direction of the rear floor beam and is welded with the longitudinal beam. The lower end of the connecting beam of the front floor cross beam and the lower end of the sill beam are welded.
优选的,所述前底板横梁连接梁与纵梁焊接处形成十字形结构。Preferably, a cross-shaped structure is formed at the welding place between the front floor cross beam connecting beam and the longitudinal beam.
优选的,所述前底板横梁连接梁一端为楔形结构,另外一端为方形直面型结构。Preferably, one end of the front floor cross-beam connecting beam is a wedge-shaped structure, and the other end is a square straight-face structure.
优选的,所述后底板横梁外接头为等腰梯形结构。Preferably, the outer joint of the rear floor cross beam is an isosceles trapezoid structure.
优选的,所述后底板横梁外接头为直角梯形结构。Preferably, the outer joint of the rear floor cross beam is a right-angled trapezoid structure.
一种车身前底板横梁与底板纵梁十字型结构的焊接工艺,具体包括如下步骤,A welding process of a cross-shaped structure of a front bottom plate beam and a bottom plate longitudinal beam of a vehicle body specifically includes the following steps:
步骤一:前底板横梁两端分别与前底板横梁接头三面焊接;Step 1: Weld the two ends of the front bottom plate beam to the three sides of the front bottom plate beam joint respectively;
步骤二:前底板横梁接头与纵梁三面焊接;Step 2: Weld the front bottom plate beam joint and the longitudinal beam on three sides;
步骤三:后底板横梁两端分别与后底板横梁接头三面焊接;Step 3: Weld the two ends of the rear floor beam to the three sides of the rear floor beam joint respectively;
步骤四:后底板横梁接头与纵梁三面焊接;Step 4: Weld the cross beam joint of the rear bottom plate and the longitudinal beam on three sides;
步骤五:前底板横梁连接梁放在前底板横梁上端,且横向向外延伸;Step 5: The connecting beam of the front floor beam is placed on the upper end of the front floor beam and extends laterally outwards;
步骤六:前底板横梁连接梁分别与前底板横梁、前底板横梁接头和纵梁焊接;Step 6: Weld the front floor beam connecting beams with the front floor beams, the front floor beam joints and the longitudinal beams respectively;
步骤七:后底板横梁外接头放在纵梁外侧,且位于后底板横梁横向向外延伸方向;Step 7: The outer joint of the rear floor beam is placed on the outside of the longitudinal beam, and is located in the lateral and outward extension direction of the rear floor beam;
步骤八:后底板横梁外接头与纵梁焊接;Step 8: Weld the outer joint of the rear floor beam to the longitudinal beam;
步骤九:门槛梁前端与前底板横梁连接梁端部焊接,门槛梁后端与后底板横梁外接头焊接;Step 9: Weld the front end of the door sill beam with the end of the connecting beam of the front floor beam, and the rear end of the door sill beam and the outer joint of the rear floor beam;
步骤十:门槛踏板分别与纵梁下端、前底板横梁连接梁下端、门槛梁下端焊接。Step 10: Weld the sill pedal with the lower end of the longitudinal beam, the lower end of the connecting beam of the front floor cross beam, and the lower end of the sill beam respectively.
采用以上技术方案的有益效果是:The beneficial effects of adopting the above technical solutions are:
1、该车身前底板横梁与底板纵梁十字型结构,还包括前底板横梁连接梁、后底板横梁外接头、门槛梁和门槛踏板,所述前底板横梁连接梁设于前底板横梁上方,且横向向外延伸,前底板横梁连接梁分别与前底板横梁、前底板横梁接头和纵梁焊接,所述后底板横梁外接头位于后底板横梁向外延伸方向,且与纵梁焊接,所述门槛梁前端与前底板横梁连接梁端部焊接,门槛梁后端与后底板横梁外接头焊接,所述门槛踏板分别与纵梁下端、前底板横梁连接梁下端、门槛梁下端焊接,原来前底板横梁两端通过前底板横梁接头与纵梁焊接,形成了“T”型接头梁结构,在原“T”字型接头梁结构基础上,增加了前底板横梁连接梁,且设于前底板横梁上方,且横向向外延伸,并分别与前底板横梁、前底板横梁接头和纵梁焊接,前底板横梁连接梁贯穿整个纵梁,从前底板横梁连接到门槛梁,通过前底板横梁、前底板横梁接头和纵梁构成稳定可靠的十字型结构,大大提高了前底板横梁和纵梁交接位置梁接头结构性能,构成了一个性能更优于原“T”字型接头梁的十字型结构,从而实现在正面碰撞和侧面碰撞发生时,碰撞力能够进行侧向和正向传递,解决原先单一纵梁结构碰撞安全风险问题。1. The cross-shaped structure of the front floor beam and the floor longitudinal beam of the vehicle body also includes the front floor beam connecting beam, the rear floor beam outer joint, the sill beam and the sill pedal, and the front floor beam connecting beam is arranged above the front floor beam, and Extending laterally outward, the front floor cross beam connecting beam is welded with the front floor beam, the front floor beam joint and the longitudinal beam respectively, and the rear floor beam outer joint is located in the outward extension direction of the rear floor beam, and is welded with the longitudinal beam. The front end of the beam is welded with the end of the connecting beam of the front floor cross beam, and the rear end of the sill beam is welded with the outer joint of the rear floor beam. Through the welding of the front floor beam joint and the longitudinal beam, a "T" type joint beam structure is formed. On the basis of the original "T" type joint beam structure, the front floor beam connecting beam is added, which is located above the front floor beam, and the horizontal It extends outward and is welded to the front floor beam, the front floor beam joint and the longitudinal beam respectively. The front floor beam connecting beam runs through the entire longitudinal beam, from the front floor beam to the sill beam, through the front floor beam, the front floor beam joint and the longitudinal beam. It forms a stable and reliable cross-shaped structure, which greatly improves the performance of the beam joint structure at the intersection of the front floor beam and the longitudinal beam, and forms a cross-shaped structure with better performance than the original "T"-shaped joint beam, so as to realize the impact of frontal collision and When a side collision occurs, the collision force can be transmitted laterally and forwardly, solving the collision safety risk of the original single longitudinal beam structure.
所述前底板横梁连接梁一端为楔形结构,另外一端为方形直面型结构,楔形结构方便了与前底板横梁的焊接,且不会占用太多前底板横梁下方的空间,方形直面型结构方便了与门槛梁的焊接;所述后底板横梁外接头为等腰梯形结构,保证了后底板横梁外接头遭受侧面碰撞时的承载结构稳定;所述后底板横梁外接头为直角梯形结构,不仅保证了后底板横梁外接头遭受侧面碰撞时的承载结构稳定,而且降低了占用车身下端空间。One end of the front floor beam connecting beam is a wedge-shaped structure, and the other end is a square straight-face structure. The wedge-shaped structure facilitates welding with the front floor beam, and does not occupy too much space under the front floor beam. The square straight-face structure is convenient Welding with the sill beam; the outer joint of the rear floor beam is an isosceles trapezoid structure, which ensures the stability of the bearing structure when the outer joint of the rear floor beam is subjected to a side impact; the outer joint of the rear floor beam is a right-angled trapezoid structure, which not only ensures The load-bearing structure of the outer joint of the rear floor cross member is stable when it is subjected to a side impact, and the space occupied at the lower end of the vehicle body is reduced.
2、十字型结构也有利于前碰力沿纵梁传递时,通过高刚度高强度的十字型结构经过前底板横梁和前底板横梁连接梁传递到车身两侧,通过整个下部车身框架传力,有效改善前碰性能。2. The cross-shaped structure is also conducive to the transmission of the front impact force along the longitudinal beam through the high-rigidity and high-strength cross-shaped structure, which is transmitted to both sides of the vehicle body through the front floor beam and the front floor beam connecting beam, and the force is transmitted through the entire lower body frame. Effectively improve front impact performance.
3、横向贯穿的前底板横梁连接梁同前底板横梁、前底板横梁接头以及纵梁焊接,构成高刚度高强度的十字型结构,侧碰力撞击在门槛梁上,被前底板横梁接头承载,且通过十字型结构传递至前底板横梁和纵梁,增加了侧碰传力路径,有利于侧碰力通过纵梁前后传递分解,避免门槛踏板作为薄板类零件直接被压溃,避免了侧向空间压缩严重直接威胁驾乘人员生命安全的问题,提高了此类车身结构车型的碰撞安全系数,极大改善了侧碰性能。3. The transversely penetrating front floor beam connecting beam is welded with the front floor beam, the front floor beam joint and the longitudinal beam to form a cross-shaped structure with high rigidity and high strength. The side impact force hits the sill beam, is carried by the front floor beam joint, and passes The cross-shaped structure is transmitted to the front floor beam and the longitudinal beam, which increases the side impact force transmission path, which is conducive to the transmission and decomposition of the side impact force through the longitudinal beam front and rear, and avoids the door sill pedal being directly crushed as a thin plate part, avoiding lateral space compression. The problem of serious and direct threat to the life safety of drivers and passengers has improved the collision safety factor of this type of body structure model and greatly improved the side impact performance.
4、一种车身前底板横梁与底板纵梁十字型结构的焊接工艺,上述焊接过程,并未大修改原始“T”字型接头梁结构的焊接工艺,也未设计新的前底板横梁、前底板横梁接头、后底板横梁、后底板横梁接头和纵梁的结构,不需要从新开冲压模,也不需要调整焊接生产线上的焊接机械臂,只增加一个前底板横梁连接梁的焊接工序,在加强了汽车车身刚度和强度的同时,并未增加过多的制造成本。4. A welding process for the cross-shaped structure of the front floor beam and the floor longitudinal beam of the vehicle body. The above welding process does not greatly modify the welding process of the original "T"-shaped joint beam structure, nor does it design new front floor beams, front The structure of the bottom plate beam joint, the rear bottom plate beam, the rear bottom plate beam joint and the longitudinal beam does not need to re-open the stamping die, nor does it need to adjust the welding robot arm on the welding production line, only add a welding process of the front bottom plate beam connecting beam, While strengthening the rigidity and strength of the automobile body, it does not increase the excessive manufacturing cost.
附图说明Description of drawings
图1是该车身前底板横梁与底板纵梁十字型结构轴测图;Fig. 1 is the cross-shaped structural axonometric view of the front floor beam and the floor longitudinal beam of the vehicle body;
图2是该车身前底板横梁与底板纵梁十字型结构仰视图;Fig. 2 is the bottom view of the cross-shaped structure of the front floor beam and the floor longitudinal beam of the vehicle body;
图3是图2中A-A位置剖视图;Fig. 3 is A-A position sectional view in Fig. 2;
图4是图2中B-B位置剖视图;Fig. 4 is B-B position sectional view in Fig. 2;
图5是图2中C-C位置剖视图;Fig. 5 is C-C position sectional view in Fig. 2;
图6是图2中D-D位置剖视图;Fig. 6 is D-D position sectional view in Fig. 2;
图7是图1中E位置局部放大图;Fig. 7 is a partial enlarged view of position E in Fig. 1;
其中:in:
1、前底板横梁;2、前底板横梁接头;3、后底板横梁;4、后底板横梁接头;5、纵梁;6、前底板横梁连接梁;7、后底板横梁外接头;8、门槛梁;9、门槛踏板。1. Front floor beam; 2. Front floor beam joint; 3. Rear floor beam; 4. Rear floor beam joint; 5. Longitudinal beam; 6. Front floor beam connecting beam; 7. Rear floor beam outer joint; 8. Threshold Beam; 9. Threshold pedal.
具体实施方式Detailed ways
下面对照附图,通过对实施例的描述,对本发明的具体实施方式作进一步详细的说明,目的是帮助本领域的技术人员对本发明的构思、技术方案有更完整、准确和深入的理解,并有助于其实施。Below with reference to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention will be described in further detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.
如图1至图7所示,本发明是一种车身前底板横梁与底板纵梁十字型结构及焊接工艺,在现有布置空间下,充分考虑车身结构设计空间,在车身前部增加前底板横梁连接梁,连接到车身的纵梁,并通过前底板横梁接头和纵梁构成稳定可靠的十字型结构,从而实现在正面碰撞和侧面碰撞发生时,碰撞力能够进行侧向和正向传递,解决原先单一纵梁结构碰撞安全风险问题。As shown in Figures 1 to 7, the present invention is a cross-shaped structure and welding process of the front floor beam and the floor longitudinal beam of the body. Under the existing layout space, the body structure design space is fully considered, and a front floor is added at the front of the body. The beam connecting beam is connected to the longitudinal beam of the body, and forms a stable and reliable cross-shaped structure through the front floor beam joint and the longitudinal beam, so that the collision force can be transmitted laterally and forwardly in the event of a frontal collision and a side collision. The original single longitudinal beam structure collision safety risk problem.
具体的说,如图1至图7所示,包括前底板横梁1、前底板横梁接头2、后底板横梁3、后底板横梁接头4和纵梁5,所述前底板横梁1两端通过前底板横梁接头2与纵梁5焊接,所述后底板横梁3两端通过后底板横梁接头4与纵梁5焊接,还包括前底板横梁连接梁6、后底板横梁外接头7、门槛梁8和门槛踏板9,所述前底板横梁连接梁6设于前底板横梁1下方,且横向向外延伸,前底板横梁连接梁6分别与前底板横梁1、前底板横梁接头2和纵梁5焊接,所述后底板横梁外接头7位于后底板横梁3向外延伸方向,且与纵梁5焊接,所述门槛梁8前端与前底板横梁连接梁6端部焊接,门槛梁8后端与后底板横梁外接头7焊接,所述门槛踏板9分别与纵梁5下端、前底板横梁连接梁6下端、门槛梁8下端焊接。Specifically, as shown in FIG. 1 to FIG. 7 , it includes a
所述前底板横梁连接梁6与纵梁5焊接处形成十字形结构。The
所述前底板横梁连接梁6一端为楔形结构,另外一端为方形直面型结构。One end of the front floor cross
所述后底板横梁外接头7为等腰梯形结构。The outer joint 7 of the rear floor beam is an isosceles trapezoid structure.
所述后底板横梁外接头7为直角梯形结构。The outer joint 7 of the rear floor cross beam is a right-angled trapezoid structure.
一种车身前底板横梁与底板纵梁十字型结构的焊接工艺,具体包括如下步骤,A welding process of a cross-shaped structure of a front bottom plate beam and a bottom plate longitudinal beam of a vehicle body specifically includes the following steps:
步骤一:前底板横梁1两端分别与前底板横梁接头2三面焊接;Step 1: Weld the two ends of the
步骤二:前底板横梁接头2与纵梁5三面焊接;Step 2: Weld the front bottom plate beam joint 2 and the
步骤三:后底板横梁3两端分别与后底板横梁接头4三面焊接;Step 3: Weld the two ends of the
步骤四:后底板横梁接头4与纵梁5三面焊接;Step 4: Weld three sides of the rear bottom plate beam joint 4 and the
步骤五:前底板横梁连接梁6放在前底板横梁1上端,且横向向外延伸;Step 5: The front floor cross
步骤六:前底板横梁连接梁6分别与前底板横梁1、前底板横梁接头2和纵梁5焊接;Step 6: The front floor
步骤七:后底板横梁外接头7放在纵梁5外侧,且位于后底板横梁3横向向外延伸方向;Step 7: The outer joint 7 of the rear floor beam is placed on the outside of the
步骤八:后底板横梁外接头7与纵梁5焊接;Step 8: Welding the outer joint 7 of the rear floor beam and the
步骤九:门槛梁8前端与前底板横梁连接梁6端部焊接,门槛梁8后端与后底板横梁外接头7焊接;Step 9: The front end of the rocker beam 8 is welded with the end of the connecting
步骤十:门槛踏板9分别与纵梁5下端、前底板横梁连接梁6下端、门槛梁8下端焊接。Step 10: The
以下用具体实施例对具体工作方式进行阐述:The specific working mode is described below with specific embodiments:
实施例1:Example 1:
该车身前底板横梁与底板纵梁十字型结构,还包括前底板横梁连接梁6、后底板横梁外接头7、门槛梁8和门槛踏板9,所述前底板横梁连接梁6设于前底板横梁1下方,且横向向外延伸,前底板横梁连接梁6分别与前底板横梁1、前底板横梁接头2和纵梁5焊接,所述后底板横梁外接头7位于后底板横梁3向外延伸方向,且与纵梁5焊接,所述门槛梁8前端与前底板横梁连接梁6端部焊接,门槛梁8后端与后底板横梁外接头7焊接,所述门槛踏板9分别与纵梁5下端、前底板横梁连接梁6下端、门槛梁8下端焊接,原来前底板横梁1两端通过前底板横梁接头2与纵梁5焊接,形成了“T”型接头梁结构,在原“T”字型接头梁结构基础上,增加了前底板横梁连接梁6,且设于前底板横梁1上方,且横向向外延伸,并分别与前底板横梁1、前底板横梁接头2和纵梁5焊接,前底板横梁连接梁6贯穿整个纵梁5,从前底板横梁1连接到门槛梁8,通过前底板横梁1、前底板横梁接头2和纵梁5构成稳定可靠的十字型结构,大大提高了前底板横梁1和纵梁5交接位置梁接头结构性能,构成了一个性能更优于原“T”字型接头梁的十字型结构,从而实现在正面碰撞和侧面碰撞发生时,碰撞力能够进行侧向和正向传递,解决原先单一纵梁结构碰撞安全风险问题。The cross-shaped structure of the front floor beam and the floor longitudinal beam of the vehicle body also includes a front floor
所述前底板横梁连接梁6一端为楔形结构,另外一端为方形直面型结构,楔形结构方便了与前底板横梁1的焊接,且不会占用太多前底板横梁1下方的空间,方形直面型结构方便了与门槛梁8的焊接;所述后底板横梁外接头7为等腰梯形结构,保证了后底板横梁外接头7遭受侧面碰撞时的承载结构稳定;所述后底板横梁外接头7为直角梯形结构,不仅保证了后底板横梁外接头7遭受侧面碰撞时的承载结构稳定,而且降低了占用车身下端空间。One end of the front floor
实施例2:Example 2:
在正面碰撞传力过程中,碰撞力沿前纵梁向后传递,传递到十字型结构位置,可以将碰撞力分解为三个方向,一部分力通过前底板横梁1传递到对侧纵梁5和门槛梁8,一部分力通过前底板横梁连接梁6传递到本侧门槛梁8,一部分力沿着纵梁5向后传递;前碰发生时,无论是偏置碰撞,还是正面碰撞,均可以使整个下部车身框架发挥整体承载和受力作用,十字型结构也有利于前碰力沿纵梁5传递时,通过高刚度高强度的十字型结构经过前底板横梁1和前底板横梁连接梁6传递到车身两侧,通过整个下部车身框架传力,有效改善前碰性能。In the process of force transmission in a frontal collision, the collision force is transmitted backwards along the front longitudinal beam and is transmitted to the cross-shaped structure. The collision force can be decomposed into three directions, and a part of the force is transmitted to the opposite side
实施例3:Example 3:
发生侧面碰撞时,由于前底板横梁1以及左右前底板横梁连接板横向贯穿整个车身,一部分侧向碰撞力能够横向实现很好的承载和传力,一部分碰撞力向前后方向传递,通过纵梁5承受和传力,进一步改善侧碰效果,横向贯穿的前底板横梁连接梁6同前底板横梁1、前底板横梁接头2以及纵梁5焊接,构成高刚度高强度的十字型结构,侧碰力撞击在门槛梁8上,被前底板横梁接头2承载,且通过十字型结构传递至前底板横梁1和纵梁5,增加了侧碰传力路径,有利于侧碰力通过纵梁5前后传递分解,避免门槛踏板9作为薄板类零件直接被压溃,避免了侧向空间压缩严重直接威胁驾乘人员生命安全的问题,提高了此类车身结构车型的碰撞安全系数,极大改善了侧碰性能。In the event of a side collision, since the
实施例4:Example 4:
一种车身前底板横梁与底板纵梁十字型结构的焊接工艺,上述焊接过程,并未大修改原始“T”字型接头梁结构的焊接工艺,也未设计新的前底板横梁1、前底板横梁接头2、后底板横梁3、后底板横梁接头4和纵梁5的结构,不需要从新开冲压模,也不需要调整焊接生产线上的焊接机械臂,只增加一个前底板横梁连接梁6的焊接工序,在加强了汽车车身刚度和强度的同时,并未增加过多的制造成本。A welding process for the cross-shaped structure of the front floor beam and the floor longitudinal beam of the vehicle body. The above welding process does not greatly modify the welding process of the original "T"-shaped joint beam structure, nor does it design a new
以上结合附图对本发明进行了示例性描述,显然,本发明具体实现并不受上述方式的限制,只要是采用了本发明的方法构思和技术方案进行的各种非实质性的改进;或未经改进,将本发明的上述构思和技术方案直接应用于其它场合的,均在本发明的保护范围之内。The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various non-substantial improvements are made by adopting the method concept and technical solution of the present invention; or After improvement, it is within the protection scope of the present invention to directly apply the above-mentioned ideas and technical solutions of the present invention to other occasions.
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