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 PDF

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Publication number
CN111661154A
CN111661154A CN202010420040.7A CN202010420040A CN111661154A CN 111661154 A CN111661154 A CN 111661154A CN 202010420040 A CN202010420040 A CN 202010420040A CN 111661154 A CN111661154 A CN 111661154A
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China
Prior art keywords
bottom plate
cross
crossbeam
front bottom
joint
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CN202010420040.7A
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Chinese (zh)
Inventor
王力
陈文仙
万中留
朱方强
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Shandong Wuzheng Group Co Ltd
Zhejiang Feidie Automobile Manufacturing Co Ltd
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Shandong Wuzheng Group Co Ltd
Zhejiang Feidie Automobile Manufacturing Co Ltd
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Application filed by Shandong Wuzheng Group Co Ltd, Zhejiang Feidie Automobile Manufacturing Co Ltd filed Critical Shandong Wuzheng Group Co Ltd
Priority to CN202010420040.7A priority Critical patent/CN111661154A/en
Publication of CN111661154A publication Critical patent/CN111661154A/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/006—Vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention discloses a cross structure of a front bottom plate cross beam and a bottom plate longitudinal beam of a vehicle body, which comprises a front bottom plate cross beam, a front bottom plate cross beam joint, a rear bottom plate cross beam joint and a longitudinal beam, and also comprises a front bottom plate cross beam connecting beam, a rear bottom plate cross beam outer joint, a threshold beam and a threshold pedal, wherein the front bottom plate cross beam connecting beam is arranged below the front bottom plate cross beam, the front bottom plate cross beam connecting beam is respectively welded with the front bottom plate cross beam, the front bottom plate cross beam joint and the longitudinal beam, the rear bottom plate cross beam outer joint is welded with the longitudinal beam, the front end of the threshold beam is welded with the end part of the front bottom plate cross beam connecting beam, the rear end of the threshold beam is welded with the rear bottom plate cross beam outer joint, the threshold pedal is respectively welded with the lower end of the longitudinal beam, the lower end of the front bottom plate cross beam connecting beam, the collision force can be transmitted in a lateral direction and a forward direction, and the problem of collision safety risk of the original single longitudinal beam structure is solved.

Description

Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process
Technical Field
The invention belongs to the technical field of automobile body structures, and particularly relates to a cross structure of a front bottom plate cross beam and a bottom plate longitudinal beam of an automobile body and a welding process.
Background
In the design of the framework of the lower structure of the existing most automobile body, a front longitudinal beam in an engine compartment extends backwards, a front baffle is attached backwards, and the front longitudinal beam and the front baffle are integrally connected in a penetrating way. Meanwhile, the left and right inclined strut type beam structures are respectively added at the rear end of the front longitudinal beam and are respectively connected with the doorsill beam and the middle channel longitudinal beam, so that force transfer in the front of the vehicle body is decomposed into three paths, the force transfer performance of front collision is improved, and the force transfer effect of collision is effectively improved. The vehicle body frame structure can effectively improve the force transmission of front and side collision, and has wide application in the development of the existing vehicle body.
For the vehicle body structure with a large part system arranged in the middle of an engine or below a driver and a passenger, a front longitudinal beam in an engine compartment extends backwards due to the design space and is connected with the longitudinal beam, so that the longitudinal beam at the lower part of the whole vehicle body is connected in a penetrating way. A non-vehicle body system is arranged in a front bottom plate area at the lower part of a vehicle body, no vehicle body design space exists, a front bottom plate cross beam can be only added in the lower part area of the vehicle body in front of a driver seat and is connected with longitudinal beams on two sides to form an H-shaped structure, the stability of a lower vehicle body frame is improved, a power battery is arranged behind the front bottom plate cross beam, no structural design space exists, structural parts such as a channel beam in the vehicle body cannot be designed, the lower part of the vehicle body can only extend backwards in a single path of the longitudinal beams at present, a diagonal beam structure cannot be added, namely, a structure with a plurality of force transmission paths cannot be added, the front bottom plate cross beam is connected with the longitudinal beams from the present structure, the front bottom plate cross beam is not transversely connected to threshold beam positions on two sides of the vehicle body, the longitudinal beams and.
When the side collision happens, the doorsill pedal is taken as a thin plate part to be completely crushed, the lateral space is compressed seriously, and the life safety of drivers and passengers is directly threatened, so that the collision safety risk of the vehicle type with the vehicle body structure is very high, and the safety space of the drivers and passengers is not favorably ensured.
Disclosure of Invention
The invention provides a cross structure of a front floor beam and a bottom plate longitudinal beam of a vehicle body and a welding process, wherein under the existing arrangement space, the design space of the vehicle body structure is fully considered, a front floor beam connecting beam is additionally arranged at the front part of the vehicle body and is connected to the longitudinal beam of the vehicle body, and a stable and reliable cross structure is formed by a front floor beam connector and the longitudinal beam, so that when frontal collision and side collision occur, the collision force can be transmitted in the lateral direction and the forward direction, and the problem of collision safety risk of the original single longitudinal beam structure is solved.
In order to achieve the purpose, the invention adopts the technical scheme that: a cross structure of a front bottom plate cross beam and a bottom plate longitudinal beam of an automobile body comprises a front bottom plate cross beam, a front bottom plate cross beam joint, a rear bottom plate cross beam joint and a longitudinal beam, wherein two ends of the front bottom plate cross beam are welded with the longitudinal beam through the front bottom plate cross beam joint, two ends of the rear bottom plate cross beam are welded with the longitudinal beam through the rear bottom plate cross beam joint, the cross structure further comprises a front bottom plate cross beam connecting beam, a rear bottom plate cross beam outer joint, a threshold beam and a threshold pedal, the front bottom plate cross beam connecting beam is arranged below the front bottom plate cross beam and extends transversely outwards, the front bottom plate cross beam connecting beam is respectively welded with the front bottom plate cross beam, the front bottom plate cross beam joint and the longitudinal beam, the rear bottom plate cross beam outer joint is positioned in the direction in which the rear bottom plate cross beam extends outwards and is welded with the longitudinal beam, the front end, and the threshold pedal is respectively welded with the lower end of the longitudinal beam, the lower end of the front bottom plate cross beam connecting beam and the lower end of the threshold beam.
Preferably, the welding part of the front bottom plate cross beam connecting beam and the longitudinal beam forms a cross structure.
Preferably, one end of the front bottom plate beam connecting beam is of a wedge-shaped structure, and the other end of the front bottom plate beam connecting beam is of a square straight-surface structure.
Preferably, the outer joint of the rear bottom plate cross beam is of an isosceles trapezoid structure.
Preferably, the outer joint of the rear bottom plate cross beam is of a right-angled trapezoid structure.
A welding process of a cross structure of a front bottom plate cross beam and a bottom plate longitudinal beam of a vehicle body specifically comprises the following steps,
the method comprises the following steps: two ends of the front bottom plate cross beam are respectively welded with three surfaces of the front bottom plate cross beam joint;
step two: the front bottom plate cross beam joint is welded with three sides of the longitudinal beam;
step three: two ends of the rear bottom plate cross beam are respectively welded with three surfaces of the rear bottom plate cross beam joint;
step four: the beam joint of the rear bottom plate is welded with three surfaces of the longitudinal beam;
step five: the front bottom plate beam connecting beam is arranged at the upper end of the front bottom plate beam and extends outwards transversely;
step six: the front bottom plate beam connecting beam is respectively welded with the front bottom plate beam, the front bottom plate beam joint and the longitudinal beam;
step seven: the outer joint of the rear bottom plate cross beam is arranged on the outer side of the longitudinal beam and is positioned in the transverse outward extending direction of the rear bottom plate cross beam;
step eight: the outer joint of the beam of the rear bottom plate is welded with the longitudinal beam;
step nine: the front end of the threshold beam is welded with the end part of the front bottom plate beam connecting beam, and the rear end of the threshold beam is welded with the outer joint of the rear bottom plate beam;
step ten: the threshold pedal is respectively welded with the lower end of the longitudinal beam, the lower end of the front bottom plate cross beam connecting beam and the lower end of the threshold beam.
The beneficial effect of adopting above technical scheme is:
1. the cross structure of the front bottom plate cross beam and the bottom plate longitudinal beam of the automobile body also comprises a front bottom plate cross beam connecting beam, a rear bottom plate cross beam outer joint, a threshold beam and a threshold pedal, wherein the front bottom plate cross beam connecting beam is arranged above the front bottom plate cross beam and extends transversely outwards, the front bottom plate cross beam connecting beam is respectively welded with the front bottom plate cross beam, the front bottom plate cross beam joint and the longitudinal beam, the rear bottom plate cross beam outer joint is positioned in the outwards extending direction of the rear bottom plate cross beam and is welded with the longitudinal beam, the front end of the threshold beam is welded with the end part of the front bottom plate cross beam connecting beam, the rear end of the threshold beam is welded with the rear bottom plate cross beam outer joint, the threshold pedal is respectively welded with the lower end of the longitudinal beam, the lower end of the front bottom plate cross beam connecting beam and the lower end of the threshold beam, two ends of the front bottom plate cross beam are welded with the longitudinal beam through, increased the front floor crossbeam tie-beam, and locate front floor crossbeam top, and transversely outwards extend, and respectively with the front floor crossbeam, front floor crossbeam connects and longeron welding, front floor crossbeam tie-beam runs through whole longeron, be connected to the threshold roof beam from the front floor crossbeam, through the front floor crossbeam, front floor crossbeam connects and longeron constitutes reliable and stable cross structure, front floor crossbeam and longeron handing-over position beam joint design performance has been improved greatly, the cross structure that former "T" style of calligraphy connects the roof beam has been more superior to a performance has been constituted, thereby realize when frontal collision takes place with the side collision, the impact can carry out side direction and forward transmission, solve original single longeron structure collision safety risk problem.
One end of the front bottom plate beam connecting beam is of a wedge-shaped structure, the other end of the front bottom plate beam connecting beam is of a square straight-surface structure, the wedge-shaped structure facilitates welding with the front bottom plate beam, too much space below the front bottom plate beam is not occupied, and the square straight-surface structure facilitates welding with the sill beam; the outer joint of the rear bottom plate beam is of an isosceles trapezoid structure, so that the stability of a bearing structure when the outer joint of the rear bottom plate beam is subjected to side collision is ensured; the rear bottom plate crossbeam outer joint is of a right trapezoid structure, so that the stability of a bearing structure of the rear bottom plate crossbeam outer joint subjected to side collision is guaranteed, and the space occupied at the lower end of the vehicle body is reduced.
2. The cross structure is also favorable for transmitting the front collision force along the longitudinal beam, and the high-rigidity and high-strength cross structure transmits the force to two sides of the vehicle body through the front bottom plate cross beam and the front bottom plate cross beam connecting beam, so that the force is transmitted through the whole lower vehicle body frame, and the front collision performance is effectively improved.
3. The front floor crossbeam tie-beam that transversely runs through is with the front floor crossbeam, front floor crossbeam connects and longeron welding, constitute the cross structure of high rigidity high strength, the side impact striking is on the threshold roof beam, be born by front floor crossbeam connects, and transmit to front floor crossbeam and longeron through the cross structure, side impact biography power route has been increased, be favorable to the side impact to pass through the longeron around the transmission decompose, avoid the threshold footboard directly to be conquassated as sheet metal class part, the problem of the serious direct threat of driver and crew life safety of lateral space compression has been avoided, the collision factor of safety of this type of body structure motorcycle type has been improved, the side impact performance has greatly been improved.
4. A welding process of a cross structure of a front bottom plate beam and a bottom plate longitudinal beam of an automobile body is characterized in that the welding process does not greatly modify the welding process of an original T-shaped joint beam structure, and new structures of the front bottom plate beam, the front bottom plate beam joint, the rear bottom plate beam joint and the longitudinal beam are not designed, so that a new stamping die is not needed, a welding mechanical arm on a welding production line is not needed to be adjusted, only a welding procedure of a front bottom plate beam connecting beam is added, and the rigidity and the strength of the automobile body are enhanced, and meanwhile, excessive manufacturing cost is not increased.
Drawings
FIG. 1 is an isometric view of a cross-shaped structure of a front floor beam and a floor stringer of the vehicle body;
FIG. 2 is a bottom view of the cross-shaped configuration of the front floor cross member and the floor side members of the vehicle body;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken at the location B-B in FIG. 2;
FIG. 5 is a cross-sectional view taken at the position C-C in FIG. 2;
FIG. 6 is a cross-sectional view taken at the location D-D in FIG. 2;
FIG. 7 is an enlarged view of a portion of FIG. 1 at position E;
wherein:
1. a front floor beam; 2. a front floor beam joint; 3. a rear floor beam; 4. a rear floor beam joint; 5. a stringer; 6. the front bottom plate beam is connected with the beam; 7. the rear bottom plate beam is externally connected; 8. a threshold beam; 9. a threshold pedal.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in figures 1 to 7, the invention relates to a cross structure of a front floor beam and a bottom plate longitudinal beam of a vehicle body and a welding process, which fully considers the design space of the vehicle body structure under the existing arrangement space, adds a front floor beam connecting beam at the front part of the vehicle body, is connected to the longitudinal beam of the vehicle body, and forms a stable and reliable cross structure through a front floor beam joint and the longitudinal beam, thereby realizing that the collision force can be transmitted laterally and forwardly when a frontal collision and a side collision occur, and solving the problem of the collision safety risk of the original single longitudinal beam structure.
Specifically, as shown in fig. 1 to 7, the structure comprises a front bottom plate beam 1, a front bottom plate beam joint 2, a rear bottom plate beam 3, a rear bottom plate beam joint 4 and a longitudinal beam 5, wherein two ends of the front bottom plate beam 1 are welded with the longitudinal beam 5 through the front bottom plate beam joint 2, two ends of the rear bottom plate beam 3 are welded with the longitudinal beam 5 through the rear bottom plate beam joint 4, the structure further comprises a front bottom plate beam connecting beam 6, a rear bottom plate beam outer joint 7, a threshold beam 8 and a threshold pedal 9, the front bottom plate beam connecting beam 6 is arranged below the front bottom plate beam 1 and extends transversely outwards, the front bottom plate beam connecting beam 6 is respectively welded with the front bottom plate beam 1, the front bottom plate beam joint 2 and the longitudinal beam 5, the rear bottom plate beam outer joint 7 is positioned in the direction in which the rear bottom plate beam 3 extends outwards and is welded with the longitudinal beam 5, the front end of the threshold beam 8 is welded with the end of, the rear end of the threshold beam 8 is welded with the outer joint 7 of the rear bottom plate cross beam, and the threshold pedal 9 is respectively welded with the lower end of the longitudinal beam 5, the lower end of the front bottom plate cross beam connecting beam 6 and the lower end of the threshold beam 8.
The welding part of the front bottom plate beam connecting beam 6 and the longitudinal beam 5 forms a cross structure.
One end of the front bottom plate beam connecting beam 6 is of a wedge-shaped structure, and the other end of the front bottom plate beam connecting beam is of a square straight-face structure.
The rear bottom plate crossbeam outer joint 7 is of an isosceles trapezoid structure.
The rear bottom plate cross beam outer joint 7 is of a right-angle trapezoidal structure.
A welding process of a cross structure of a front bottom plate cross beam and a bottom plate longitudinal beam of a vehicle body specifically comprises the following steps,
the method comprises the following steps: two ends of the front bottom plate beam 1 are respectively welded with three surfaces of the front bottom plate beam joint 2;
step two: the front bottom plate cross beam joint 2 is welded with the longitudinal beam 5 on three sides;
step three: two ends of the rear bottom plate cross beam 3 are respectively welded with three surfaces of the rear bottom plate cross beam joint 4;
step four: the rear bottom plate cross beam joint 4 is welded with the longitudinal beam 5 on three sides;
step five: the front bottom plate beam connecting beam 6 is arranged at the upper end of the front bottom plate beam 1 and extends outwards in the transverse direction;
step six: the front bottom plate beam connecting beam 6 is respectively welded with the front bottom plate beam 1, the front bottom plate beam joint 2 and the longitudinal beam 5;
step seven: the rear base plate cross beam outer joint 7 is arranged on the outer side of the longitudinal beam 5 and is positioned in the transverse outward extending direction of the rear base plate cross beam 3;
step eight: the outer joint 7 of the beam of the rear bottom plate is welded with the longitudinal beam 5;
step nine: the front end of the threshold beam 8 is welded with the end part of the front bottom plate beam connecting beam 6, and the rear end of the threshold beam 8 is welded with the rear bottom plate beam outer joint 7;
step ten: the threshold pedal 9 is respectively welded with the lower end of the longitudinal beam 5, the lower end of the front bottom plate beam connecting beam 6 and the lower end of the threshold beam 8.
The following specific working modes are illustrated by specific examples:
example 1:
the cross structure of the front bottom plate cross beam and the bottom plate longitudinal beam of the automobile body also comprises a front bottom plate cross beam connecting beam 6, a rear bottom plate cross beam outer joint 7, a threshold beam 8 and a threshold pedal 9, wherein the front bottom plate cross beam connecting beam 6 is arranged below the front bottom plate cross beam 1 and extends transversely outwards, the front bottom plate cross beam connecting beam 6 is respectively welded with the front bottom plate cross beam 1, the front bottom plate cross beam joint 2 and the longitudinal beam 5, the rear bottom plate cross beam outer joint 7 is positioned in the outwards extending direction of the rear bottom plate cross beam 3 and is welded with the longitudinal beam 5, the front end of the threshold beam 8 is welded with the end part of the front bottom plate cross beam connecting beam 6, the rear end of the threshold beam 8 is welded with the rear bottom plate cross beam outer joint 7, the threshold pedal 9 is respectively welded with the lower end of the longitudinal beam 5, the lower end of the front bottom plate cross beam connecting beam 6 and the lower end of the threshold beam 8, a T-shaped joint beam structure is formed, a front bottom plate beam connecting beam 6 is added on the basis of the original T-shaped joint beam structure, is arranged above the front bottom plate beam 1 and transversely extends outwards, and respectively welded with the front bottom plate beam 1, the front bottom plate beam joint 2 and the longitudinal beam 5, the front bottom plate beam connecting beam 6 penetrates through the whole longitudinal beam 5 and is connected with the threshold beam 8 from the front bottom plate beam 1, the front bottom plate beam 1, the front bottom plate beam joint 2 and the longitudinal beam 5 form a stable and reliable cross structure, thereby greatly improving the performance of the beam joint structure at the joint position of the front bottom plate beam 1 and the longitudinal beam 5, forming a cross structure with the performance better than that of the original T-shaped joint beam, therefore, when the front collision and the side collision occur, the collision force can be transmitted laterally and positively, and the problem of the collision safety risk of the original single longitudinal beam structure is solved.
One end of the front bottom plate beam connecting beam 6 is of a wedge-shaped structure, the other end of the front bottom plate beam connecting beam is of a square straight-surface structure, the wedge-shaped structure facilitates welding with the front bottom plate beam 1, too much space below the front bottom plate beam 1 cannot be occupied, and the square straight-surface structure facilitates welding with the threshold beam 8; the rear bottom plate crossbeam outer joint 7 is of an isosceles trapezoid structure, so that the stability of a bearing structure when the rear bottom plate crossbeam outer joint 7 is subjected to side collision is ensured; the rear bottom plate crossbeam outer joint 7 is of a right-angled trapezoid structure, so that the stability of a bearing structure of the rear bottom plate crossbeam outer joint 7 subjected to side collision is guaranteed, and the space occupied at the lower end of the automobile body is reduced.
Example 2:
in the process of front collision force transmission, collision force is transmitted backwards along the front longitudinal beam and is transmitted to the position of a cross structure, the collision force can be decomposed into three directions, part of force is transmitted to the opposite side longitudinal beam 5 and the threshold beam 8 through the front bottom plate cross beam 1, part of force is transmitted to the threshold beam 8 on the side through the front bottom plate cross beam connecting beam 6, and part of force is transmitted backwards along the longitudinal beam 5; when the front collision happens, no matter the front collision is offset collision or frontal collision, the whole lower body frame can be enabled to play the whole bearing and stress functions, the cross structure is also beneficial to the transmission of the front collision force along the longitudinal beam 5, the high-rigidity and high-strength cross structure is transmitted to the two sides of the body through the front bottom plate cross beam 1 and the front bottom plate cross beam connecting beam 6, and the force transmission is realized through the whole lower body frame, so that the front collision performance is effectively improved.
Example 3:
when side collision occurs, because the front bottom plate cross beam 1 and the left and right front bottom plate cross beam connecting plates transversely penetrate through the whole automobile body, part of the side collision force can transversely realize good bearing and force transmission, and part of the collision force is transmitted to the front and back directions and is borne and transmitted by the longitudinal beam 5, so that the side collision effect is further improved, the transversely penetrated front bottom plate cross beam connecting beam 6 is welded with the front bottom plate cross beam 1, the front bottom plate cross beam connector 2 and the longitudinal beam 5 to form a high-rigidity and high-strength cross structure, the side collision force impacts the doorsill beam 8 and is borne by the front bottom plate cross beam connector 2 and is transmitted to the front bottom plate cross beam 1 and the longitudinal beam 5 through the cross structure, so that a side collision force transmission path is increased, the side collision force is favorably transmitted and decomposed from front to back through the longitudinal beam 5, the doorsill pedal 9 is prevented from being directly crushed as a thin plate part, and the problem, the collision safety coefficient of the vehicle body structure type is improved, and the side collision performance is greatly improved.
Example 4:
a welding process of a cross structure of a front bottom plate beam and a bottom plate longitudinal beam of an automobile body is characterized in that the welding process does not greatly modify the welding process of an original T-shaped joint beam structure, and structures of a front bottom plate beam 1, a front bottom plate beam joint 2, a rear bottom plate beam 3, a rear bottom plate beam joint 4 and a longitudinal beam 5 are not designed, so that a stamping die does not need to be newly opened, a welding mechanical arm on a welding production line does not need to be adjusted, only a welding process of a front bottom plate beam connecting beam 6 is added, and when the rigidity and the strength of the automobile body are enhanced, excessive manufacturing cost is not increased.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the invention based on the principles and technical solutions of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims (6)

1. The utility model provides a cross structure of vehicle body front floor crossbeam and bottom plate longeron, includes front floor crossbeam (1), front floor crossbeam connects (2), rear floor crossbeam (3), rear floor crossbeam connects (4) and longeron (5), front floor crossbeam (1) both ends are passed through front floor crossbeam and are connected (2) and longeron (5) welding, rear floor crossbeam (3) both ends are passed through rear floor crossbeam and are connected (4) and longeron (5) welding, its characterized in that: still include preceding bottom plate crossbeam tie-beam (6), back bottom plate crossbeam outer joint (7), threshold roof beam (8) and threshold footboard (9), preceding bottom plate crossbeam tie-beam (6) are located preceding bottom plate crossbeam (1) below, and transversely outwards extend, preceding bottom plate crossbeam tie-beam (6) weld with preceding bottom plate crossbeam (1), preceding bottom plate crossbeam joint (2) and longeron (5) respectively, back bottom plate crossbeam outer joint (7) are located back bottom plate crossbeam (3) outside extending direction, and weld with longeron (5), threshold roof beam (8) front end and preceding bottom plate crossbeam tie-beam (6) tip welding, threshold roof beam (8) rear end and back bottom plate crossbeam outer joint (7) welding, threshold footboard (9) weld with longeron (5) lower extreme, preceding bottom plate crossbeam tie-beam (6) lower extreme, threshold roof beam (8) lower extreme respectively.
2. The cross-shaped structure of the front floor cross member and the floor side members of the vehicle body according to claim 1, wherein: the welding part of the front bottom plate beam connecting beam (6) and the longitudinal beam (5) forms a cross structure.
3. The cross-shaped structure of the front floor cross member and the floor side members of the vehicle body according to claim 1, wherein: one end of the front bottom plate beam connecting beam (6) is of a wedge-shaped structure, and the other end of the front bottom plate beam connecting beam is of a square straight-surface structure.
4. The cross-shaped structure of the front floor cross beam and the floor longitudinal beam of the vehicle body and the welding process of the cross-shaped structure are characterized in that: the rear bottom plate crossbeam outer joint (7) is of an isosceles trapezoid structure.
5. The cross-shaped structure of the front floor cross member and the floor side members of the vehicle body according to claim 1, wherein: the rear bottom plate cross beam outer joint (7) is of a right-angle trapezoidal structure.
6. A welding process for a cross structure of a front bottom plate beam and a bottom plate longitudinal beam of an automobile body is characterized in that: the method specifically comprises the following steps of,
the method comprises the following steps: two ends of the front bottom plate beam (1) are respectively welded with three surfaces of the front bottom plate beam joint (2);
step two: the front bottom plate cross beam joint (2) is welded with the longitudinal beam (5) on three sides;
step three: two ends of the rear bottom plate cross beam (3) are respectively welded with three surfaces of the rear bottom plate cross beam joint (4);
step four: the rear bottom plate cross beam joint (4) is welded with the longitudinal beam (5) on three sides;
step five: the front bottom plate beam connecting beam (6) is arranged at the upper end of the front bottom plate beam (1) and extends outwards in the transverse direction;
step six: the front bottom plate beam connecting beam (6) is respectively welded with the front bottom plate beam (1), the front bottom plate beam joint (2) and the longitudinal beam (5);
step seven: the rear base plate cross beam outer joint (7) is arranged on the outer side of the longitudinal beam (5) and is positioned in the transverse outward extending direction of the rear base plate cross beam (3);
step eight: the outer joint (7) of the beam of the rear bottom plate is welded with the longitudinal beam (5);
step nine: the front end of the threshold beam (8) is welded with the end part of the front bottom plate beam connecting beam (6), and the rear end of the threshold beam (8) is welded with the rear bottom plate beam outer joint (7);
step ten: the threshold pedal (9) is respectively welded with the lower end of the longitudinal beam (5), the lower end of the front bottom plate cross beam connecting beam (6) and the lower end of the threshold beam (8).
CN202010420040.7A 2020-05-18 2020-05-18 Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process Pending CN111661154A (en)

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Application Number Priority Date Filing Date Title
CN202010420040.7A CN111661154A (en) 2020-05-18 2020-05-18 Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process

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Application Number Priority Date Filing Date Title
CN202010420040.7A CN111661154A (en) 2020-05-18 2020-05-18 Cross structure of front bottom plate cross beam and bottom plate longitudinal beam of vehicle body and welding process

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CN111661154A true CN111661154A (en) 2020-09-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115056717A (en) * 2022-06-14 2022-09-16 东风柳州汽车有限公司 Footboard mounting structure and MPV among MPV

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115056717A (en) * 2022-06-14 2022-09-16 东风柳州汽车有限公司 Footboard mounting structure and MPV among MPV
CN115056717B (en) * 2022-06-14 2024-05-14 东风柳州汽车有限公司 Pedal mounting structure in MPV and MPV

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