CN217893040U - Side wall reinforcing plate, side wall reinforcing plate assembly and vehicle - Google Patents

Abstract

The application discloses side wall reinforcing plate, side wall reinforcing plate assembly and vehicle. The side wall reinforcing plate includes: the reinforcing plate comprises an A-column reinforcing plate and a B-column reinforcing plate, wherein the A-column reinforcing plate and the B-column reinforcing plate are connected through laser tailor welding to form an integrated half door ring structure, and the half door ring structure is provided with a downward opening. In the side wall reinforcing plate, the material sheets of the A-column reinforcing plate and the B-column reinforcing plate can be connected through laser tailor welding, then the integrated half-door ring structure is formed through hot stamping, and then the half-door ring structure can be connected with the threshold reinforcing piece to form a closed door ring structure. The arrangement of the side wall reinforcing plate is beneficial to realizing the integral weight reduction, the reduction of the tool cost, the improvement of the production efficiency and the control of the tolerance precision of the product.

Description

Side wall reinforcing plate, side wall reinforcing plate assembly and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to but not limited to a side wall reinforcing plate, a side wall reinforcing plate assembly and a vehicle.

Background

Along with the rapid development of new energy automobiles, the demand for light weight and the attention on battery safety are paid, more and more lower automobile body threshold assemblies in a host factory start to adopt the extruded aluminum alloy threshold reinforcing part 1', and the design of upper automobile body parts is limited while the threshold reinforcing structure is reduced.

In some cases, as shown in fig. 1, the door ring structure further includes three parts, namely, an a pillar lower reinforcing plate 2', an a pillar upper reinforcing plate 3' and a B pillar reinforcing plate 4', wherein the a pillar upper reinforcing plate 3' and the B pillar reinforcing plate 4 'both adopt a hot forming process, the a pillar lower reinforcing plate 2' adopts a cold stamping process, and the a pillar lower reinforcing plate 2', the a pillar upper reinforcing plate 3' and the B pillar reinforcing plate 4 'are connected by spot welding to form a sub-assembly, and then connected with the aluminum alloy door threshold reinforcing member 1' through a hot-melt self-tapping Screw FDS (Flow Drill Screw) connection.

The door ring structure has the following problems:

1. by adopting a spot welding process, the requirement on structural limitation is high, and the structural design of parts is severely limited, so that the optimal proportion of the material quality and the material thickness of parts cannot be realized, and the optimal solution of safety, noise, vibration and Harshness (NVH), strength performance and light weight cannot be realized;

2. the utilization rate of raw materials is low, only about 65%, the number of parts is large, the number of dies, clamps, welding robots and detection tools is large, and the tooling cost is high;

3. the production efficiency is lower, the energy consumption is higher: three parts (a pillar lower reinforcing plate 2', a pillar upper reinforcing plate 3' and a pillar B reinforcing plate 4 ') need 2 times of hot forming and 4-sequence cold stamping processes, and the parts need to be respectively checked for dimensional tolerance on a checking fixture.

SUMMERY OF THE UTILITY MODEL

The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

A side gusset comprising: the reinforcing plate comprises an A-column reinforcing plate and a B-column reinforcing plate, wherein the A-column reinforcing plate and the B-column reinforcing plate are connected through laser tailor welding to form an integrated half door ring structure, and the half door ring structure is provided with a downward opening.

In some exemplary embodiments, the a-pillar reinforcement plate includes an a-pillar lower reinforcement plate and an a-pillar upper reinforcement plate, and an upper end of the a-pillar lower reinforcement plate is connected to a front end of the a-pillar upper reinforcement plate by laser tailor welding.

In some exemplary embodiments, the a-pillar stiffener further includes an a-pillar stiffener connected to an upper portion of the a-pillar upper stiffener by spot welding.

In some exemplary embodiments, the B-pillar reinforcing plate includes a B-pillar upper reinforcing plate, a B-pillar middle reinforcing plate, and a B-pillar lower reinforcing plate, the B-pillar upper reinforcing plate is T-shaped, a front end of the B-pillar upper reinforcing plate is connected to a rear end of the a-pillar upper reinforcing plate by laser tailor welding, a lower end of the B-pillar upper reinforcing plate is connected to an upper end of the B-pillar middle reinforcing plate by laser tailor welding, and a lower end of the B-pillar middle reinforcing plate is connected to an upper end of the B-pillar lower reinforcing plate by laser tailor welding.

In some exemplary embodiments, the lower end of the a-pillar lower reinforcing plate is provided with a rearwardly extending rear portion, the B-pillar lower reinforcing plate has an inverted T shape, and the opening is formed between the front end of the B-pillar lower reinforcing plate and the rear portion.

In some exemplary embodiments, the thickness of the a-pillar lower reinforcing plate is < the thickness of the a-pillar upper reinforcing plate;

the thickness of the reinforcing plate under the B column is smaller than that of the reinforcing plate in the B column and smaller than that of the reinforcing plate on the B column.

In some exemplary embodiments, the side gusset further includes a C-pillar stiffener plate that is laser tailor welded to the B-pillar stiffener plate to form an integral M-shaped door ring structure having two downwardly facing openings.

In some exemplary embodiments, the side wall reinforcing plate further comprises a C-pillar reinforcing plate, the C-pillar reinforcing plate comprises a C-pillar lower reinforcing plate and a C-pillar upper reinforcing plate, a front end of the C-pillar upper reinforcing plate is connected with a rear end of the B-pillar upper reinforcing plate by laser welding, a lower end of the C-pillar upper reinforcing plate is connected with an upper end of the C-pillar lower reinforcing plate by laser welding to form an integrated M-shaped door ring structure, and the M-shaped door ring structure has two downward openings.

In some exemplary embodiments, the side wall reinforcing plate further comprises a C-pillar reinforcing plate, the C-pillar reinforcing plate comprises a C-pillar lower reinforcing plate and a C-pillar upper reinforcing plate, the front end of the C-pillar upper reinforcing plate is connected with the rear end of the B-pillar upper reinforcing plate through spot welding, the lower end of the C-pillar upper reinforcing plate is connected with the upper end of the C-pillar lower reinforcing plate through spot welding to form an M-shaped door ring structure, and the M-shaped door ring structure has two downward openings.

A side wall reinforcing plate assembly comprises a threshold reinforcing piece and any one of the side wall reinforcing plates, wherein the lower end of an A column reinforcing plate and the lower end of a B column reinforcing plate of the side wall reinforcing plate are connected with the threshold reinforcing piece.

In some exemplary embodiments, the lower end of the C-pillar stiffener of the side sill is connected to the rocker reinforcement.

In some exemplary embodiments, the rocker reinforcement is an extruded aluminum alloy member, the side wall reinforcement is a steel plate, and the lower end of the a-pillar reinforcement, the lower end of the B-pillar reinforcement, and the lower end of the C-pillar reinforcement are all configured to be connected to the rocker reinforcement by a hot-melt self-tapping screw FDS; or alternatively

The doorsill reinforcement is a sheet metal part formed by hot forming punching or rolling, the side wall reinforcement plate is a steel plate, and the lower end of the A column reinforcement plate, the lower end of the B column reinforcement plate and the lower end of the C column reinforcement plate are connected with the doorsill reinforcement through spot welding.

A vehicle comprises the side wall reinforcing plate assembly provided by any one of the above embodiments.

The side wall reinforcing plate of this application embodiment, its A post reinforcing plate and B post reinforcing plate pass through the laser tailor-welded connection back, and rethread hot stamping forms the half gantry structure of integral type, and then this half gantry structure can be connected with the threshold reinforcement and form confined gantry structure. The semi-door ring structure adopts laser tailor-welding, so that each part of the A-column reinforcing plate and the B-column reinforcing plate can be designed with different materials and thicknesses, namely different materials and thicknesses can be designed in different areas of the side wall reinforcing plate according to requirements, and the tailor-welding connection of the A-column reinforcing plate 1 and the B-column reinforcing plate 2 can reduce the lap joint area of spot welding of parts, thereby realizing the integral weight reduction; due to the integrated design of the half door ring structure, other parts except the threshold reinforcement in the door ring structure are spliced and welded to be integrated into one part, so that the tooling cost is greatly reduced, and the number of hot forming dies, cold stamping dies, welding fixtures, welding robots and part checking tools is reduced; the half door ring structure reduces the number of welding spots, improves the welding beat, reduces the stamping working time and improves the production efficiency; the half door ring structure can complete laser tailor-welding without the support of a special clamp, thereby reducing the number of required clamps and further reducing the tooling cost; the utility model provides a first laser tailor-welding forms half door ring structure, is favorable to reducing the tolerance and adds up with half door ring structure and threshold reinforcement connection formation door ring structure's method again to guarantee the uniformity of half door ring product, be favorable to controlling the tolerance precision of product.

Additional features and advantages of embodiments of the present application will be set forth in the description that follows.

Drawings

FIG. 1 is a schematic view of a door ring in some cases;

FIG. 2 is a schematic structural view of a side gusset according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a side gusset assembly according to an embodiment of the present application;

FIG. 4 is a schematic flow chart illustrating a method for manufacturing a side gusset according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of typesetting and blanking of an A-pillar lower reinforcing plate according to an embodiment of the application;

FIG. 6 is a schematic structural diagram of typesetting and blanking of an A-pillar upper reinforcing plate according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of typesetting and blanking of a B-pillar lower reinforcing plate according to an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a layout blanking of a stiffener in a B-pillar according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of typesetting and blanking of a reinforcing plate on a B-pillar according to an embodiment of the present application;

FIG. 10 is a schematic structural view of a side gusset according to another embodiment of the present application;

FIG. 11 is a schematic flow chart illustrating a method for manufacturing a side gusset according to another embodiment of the present application.

Reference numerals:

1': sill reinforcement, 2': column a lower reinforcing plate, 3': column a upper reinforcing plate, 4': a B-pillar reinforcement plate;

1: column a reinforcing plate, 11: lower a-pillar reinforcement plate, 11a: a-pillar lower gusset sheet, 111: rear extension portion, 12: a-pillar upper reinforcement plate, 12a: column a upper reinforcing plate sheet, 13: a post stiffening plate, 2: b-pillar reinforcement, 21: b-pillar lower reinforcement plate, 21a: b-pillar lower gusset, 22: b-pillar middle reinforcement plate, 22a: reinforcing plate material sheet in B column, 23: b-pillar upper reinforcement plate, 23a: reinforcing plate material sheet on B column, 31-36: laser welding parting, 4: sill reinforcement, 5: c-pillar reinforcement, 51: c-pillar lower reinforcement plate, 52: and C, a reinforcing plate is arranged on the column.

Detailed Description

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 2, the present embodiment provides a side gusset including: the A column reinforcing plate 1 and the B column reinforcing plate 2,A are connected through laser tailor welding, so that an integrated half door ring structure is formed.

According to the side wall reinforcing plate, an A-pillar reinforcing plate 1 and a B-pillar reinforcing plate 2 are subjected to laser tailor-welding and then subjected to hot stamping to form an integrated half door ring structure, the whole half door ring structure can be approximately C-shaped and provided with a downward opening, the half door ring structure can be connected with a threshold reinforcing piece 4 to form a side wall reinforcing plate assembly, as shown in figure 3, the threshold reinforcing piece 4 can seal the opening of the half door ring structure to form a closed door ring structure, and the door ring structure can be used for supporting a front door. The semi-door ring structure adopts laser tailor-welding, so that each part of the A column reinforcing plate 1 and the B column reinforcing plate 2 can be designed with different materials and thicknesses, namely different materials and thicknesses can be designed in different areas of the side wall reinforcing plate according to actual requirements, and the A column reinforcing plate 1 and the B column reinforcing plate 2 are in tailor-welding connection, so that the lap joint area of spot welding of parts can be reduced, and the integral weight reduction is realized; the integrated design of the half door ring structure integrates other parts (an A column reinforcing plate, a B column reinforcing plate and the like) in the door ring structure except for the threshold reinforcing piece into one part, so that the tooling cost is greatly reduced, and the number of hot forming dies, cold stamping dies, welding fixtures, welding robots and part checking tools is reduced; the half door ring structure reduces the number of welding spots, improves the welding beat, reduces the stamping working time and improves the production efficiency; the half door ring structure can complete laser tailor-welding without the support of a special clamp, thereby reducing the number of required clamps and further reducing the tooling cost; the method of forming the half door ring structure by laser tailor-welding and then connecting the half door ring structure with the threshold reinforcement 4 is favorable for reducing tolerance accumulation, thereby ensuring the consistency of half door ring products and being favorable for controlling the tolerance precision of the products.

Therefore, the half door ring structure of this embodiment, when practicing thrift raw and other materials, can guarantee the thickness of each part, satisfy the safe strength requirement of half door ring different positions, guarantee the security of vehicle and alleviate the weight of vehicle.

In some exemplary embodiments, as shown in fig. 2, the a-pillar reinforcement plate 1 includes an a-pillar lower reinforcement plate 11 and an a-pillar upper reinforcement plate 12, and the upper end of the a-pillar lower reinforcement plate 11 is connected to the front end of the a-pillar upper reinforcement plate 12 by laser tailor welding.

In the a-pillar reinforcement plate 1, the a-pillar lower reinforcement plate 11 may be substantially vertical, and the lower end of the a-pillar lower reinforcement plate 11 is used to connect with the threshold reinforcement 4, or the lower end of the a-pillar lower reinforcement plate 11 is provided with a backward extending portion 111 that extends backward, so that the a-pillar lower reinforcement plate 11 may be substantially L-shaped, and the backward extending portion 111 at the lower end of the a-pillar lower reinforcement plate 11 is used to connect with the threshold reinforcement 4; the upper end of the A-pillar lower reinforcing plate 11 is laser tailor welded to the front end of the A-pillar upper reinforcing plate 12 to form a laser welding slit 31, and the rear end of the A-pillar upper reinforcing plate 12 extends rearward and upward so that the A-pillar upper reinforcing plate 12 is substantially inclined.

In some exemplary embodiments, as shown in fig. 2, the a-pillar stiffener 1 further includes an a-pillar stiffener 13, and the a-pillar stiffener 13 is spot-welded to the upper portion of the a-pillar upper stiffener 12. The a-pillar reinforcing plate 13 may be a long inclined plate.

To cope with a small offset collision, an a-pillar reinforcement plate 13 is fixed to an upper portion of the a-pillar upper reinforcement plate 12. By adopting the reinforcing plate technology, the good force transmission performance of the upper part of the A column reinforcing plate 1 can be ensured, and the collision and bending of the half door ring structure are avoided.

In some exemplary embodiments, the thickness of the a-pillar lower reinforcement plate 11 < the thickness of the a-pillar reinforcement plate 13 < the thickness of the a-pillar upper reinforcement plate 12. Such as: the thickness of the lower A-pillar reinforcing plate 11 can be 1.1mm-1.5mm, such as: 1.2mm, 1.3mm, 1.4mm, etc.; the thickness of the reinforcing plate 11 on the A column can be 1.4mm-1.8mm, such as: 1.5mm, 1.6mm, 1.7mm, 1.8mm, etc.

In some exemplary embodiments, the yield strength of the a-pillar lower reinforcing plate 11 is < the yield strength of the a-pillar reinforcing plate 13, and the yield strength of the a-pillar upper reinforcing plate 12 is < the yield strength of the a-pillar reinforcing plate 13. Wherein the yield strength of the a-pillar lower reinforcing plate 11 may be equal to or less than the yield strength of the a-pillar upper reinforcing plate 12.

In some exemplary embodiments, the tensile strength of the a-pillar lower reinforcing plate 11 is less than the tensile strength of the a-pillar reinforcing plate 13, and the tensile strength of the a-pillar upper reinforcing plate 12 is less than the tensile strength of the a-pillar reinforcing plate 13. Wherein, the tensile strength of the a-pillar lower reinforcing plate 11 may be equal to or less than the tensile strength of the a-pillar upper reinforcing plate 12.

In some exemplary embodiments, the A-pillar lower reinforcement plate 11 is a steel plate and has a thickness of 1.1mm, a yield strength greater than 950MPa, and a tensile strength greater than 1300MPa. For example, the type of steel used for the a-pillar lower gusset 11 may be CR950/1300HS-AS, where CR (Cold Rolled) represents Cold rolling, HS (Hot Stamping) represents Hot Stamping, 950/1300HS represents minimum yield strength value/minimum tensile strength value after Hot Stamping, and AS (initials of Al, si) represents Cold-Rolled Hot-dip aluminum-silicon product.

The upper reinforcing plate 12 of the A column is a steel plate, the thickness of the upper reinforcing plate is 1.8mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the type of steel used for the A-pillar upper gusset 12 may be CR950/1300HS-AS. That is, the lower a-pillar reinforcement plate 11 and the upper a-pillar reinforcement plate 12 may be made of the same material, but have different thicknesses.

The A column reinforcing plate 13 is a steel plate, the thickness of the A column reinforcing plate is 1.6mm, the yield strength is larger than 1200MPa, and the tensile strength is larger than 1800MPa. For example, the type of steel used for the A-pillar stiffener 13 may be CR1200/1800HS-AS.

In order to deal with small offset collision, the reinforcing plate technology is adopted, the A column reinforcing plate 13 can be designed by adopting a thermal forming material with yield strength larger than 1200Mpa, tensile strength larger than 1700Mpa and thickness of 1.6mm, good force transmission of the upper part of the A column reinforcing plate 1 is ensured, and collision and bending are avoided.

Of course, the material, thickness, yield strength, tensile strength, and the like of the a-pillar lower reinforcement plate 11, the a-pillar reinforcement plate 13, and the a-pillar upper reinforcement plate 12 are not limited to those described above, and may be designed according to actual needs.

In some exemplary embodiments, as shown in fig. 2, the B-pillar stiffener 2 includes a B-pillar lower stiffener 21, a B-pillar middle stiffener 22, and a B-pillar upper stiffener 23, the entirety of the B-pillar upper stiffener 23 may have a straight T-shape, a front end of the B-pillar upper stiffener 23 is connected to a rear end of the a-pillar upper stiffener 12 by laser tailor welding, a lower end of the B-pillar upper stiffener 23 is connected to an upper end of the B-pillar middle stiffener 22 by laser tailor welding, and a lower end of the B-pillar middle stiffener 22 is connected to an upper end of the B-pillar lower stiffener 21 by laser tailor welding.

In the B-pillar reinforcement panel 2, the lower end of a B-pillar lower reinforcement panel 21 is used for being connected with a threshold reinforcement 4; the upper end of the B-pillar lower reinforcing plate 21 and the lower end of the B-pillar middle reinforcing plate 22 are subjected to laser tailor welding, and a laser welding seam 34 is formed; the upper end of the reinforcing plate 22 in the B column is in laser tailor-welding with the lower end of the reinforcing plate 23 on the B column, and a laser welding seam 33 is formed; the front end of the B-pillar upper reinforcement plate 23 is laser tailor welded to the rear end of the a-pillar upper reinforcement plate 12, and a laser welding slit 32 is formed.

The B-pillar lower reinforcement plate 21 may be in an inverted T shape, and an opening of a C-shaped half-door ring structure is formed between the front end of the B-pillar lower reinforcement plate 21 and the rear extension 111 of the a-pillar lower reinforcement plate 11. The lateral portion of the lower end of the B-pillar lower reinforcement plate 21 may be used for connection with the rocker reinforcement 4.

In some exemplary embodiments, the thickness of the B-pillar lower reinforcing plate 21 < the thickness of the B-pillar middle reinforcing plate 22 < the thickness of the B-pillar upper reinforcing plate 23. Wherein, the thickness of the reinforcing plate 23 on the B column is less than that of the reinforcing plate 12 on the A column, such as: the thickness of the B-pillar upper reinforcement plate 23 may be smaller than the thickness of the a-pillar upper reinforcement plate 12 by about 0.2 mm. The thickness of the upper reinforcing plate 23 of the B column may be 1.2mm to 1.6mm, the thickness of the reinforcing plate 22 in the B column may be 1.4mm to 1.8mm, and the thickness of the lower reinforcing plate 21 of the B column may be 1.2mm to 1.4mm.

In some exemplary embodiments, the yield strength of the B-pillar lower reinforcement plate 21 < the yield strength of the B-pillar middle reinforcement plate 22, and the yield strength of the B-pillar lower reinforcement plate 21 < the yield strength of the B-pillar upper reinforcement plate 23. Wherein the yield strength of the reinforcing plate 22 in the B-pillar may be equal to the yield strength of the reinforcing plate 23 on the B-pillar.

In some exemplary embodiments, the tensile strength of the B-pillar lower reinforcing plate 21 is < the tensile strength of the B-pillar middle reinforcing plate 22, and the tensile strength of the B-pillar lower reinforcing plate 21 is < the tensile strength of the B-pillar upper reinforcing plate 23. Wherein the tensile strength of the reinforcing plate 22 in the B-pillar may be equal to the tensile strength of the reinforcing plate 23 on the B-pillar.

In some exemplary embodiments, the B-pillar lower reinforcement plate 21 is a steel plate and has a thickness of 1.2mm, a yield strength greater than 350MPa, and a tensile strength greater than 500MPa. For example, the steel material used for the B-pillar lower gusset 21 may be CR350/500HS-AS.

The B column middle reinforcing plate 22 is a steel plate, the thickness of the B column middle reinforcing plate is 1.4mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the steel used for the reinforcement plate 22 in the B-pillar may be of the type CR950/1300HS-AS.

The B column upper reinforcing plate 23 is a steel plate, the thickness of the B column upper reinforcing plate is 1.8mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the steel material used for the reinforcement plate 23 on the B-pillar may be CR950/1300HS-AS. That is, the reinforcing plate 22 in the B-pillar and the reinforcing plate 23 on the B-pillar may be made of the same material, but have different thicknesses.

During side collision, the lower section area (the lower reinforcing plate 21 of the B column) of the B column reinforcing plate 2 deforms greatly, and the high-yield thermal forming material has high brittleness, so that the thermal forming material with the thickness of 1.2mm, the yield strength of more than 350MPa and the tensile strength of more than 500MPa can be selected, the ductility of the lower section area of the B column reinforcing plate 2 is increased, and the problem of easy cracking during collision is solved.

According to the half door ring structure, six components including the reinforcing plate 11 below the A column, the reinforcing plate 12 above the A column, the reinforcing plate 13 below the A column, the reinforcing plate 21 below the B column, the reinforcing plate 22 in the B column and the reinforcing plate 23 above the B column are formed through six material sheets with different materials and thicknesses, the reinforcing plate 11 below the A column, the reinforcing plate 12 above the A column, the reinforcing plate 21 below the B column, the reinforcing plate 22 in the B column and the reinforcing plate 23 above the B column are connected through laser tailor-welding to form four sections of laser welding split seams 31-34, and the integrated design of different performances in different areas is realized.

Of course, the material, thickness, yield strength, tensile strength, and the like of the B-pillar lower reinforcing plate 21, the B-pillar middle reinforcing plate 22, and the B-pillar upper reinforcing plate 23 are not limited to those described above, and may be designed according to actual needs.

As shown in fig. 3, the embodiment further provides a side wall stiffener assembly, which includes a rocker reinforcement 4 and a side wall stiffener, wherein the lower end of the a-pillar stiffener 1 and the lower end of the B-pillar stiffener 2 of the side wall stiffener are both connected to the rocker reinforcement 4.

The side wall reinforcing plate is of a half door ring structure, and two ends of the half door ring structure (namely the lower end of the A-column reinforcing plate 1 and the lower end of the B-column reinforcing plate 2) are connected with the threshold reinforcing piece 4, so that the threshold reinforcing piece 4 can seal the opening of the half door ring structure to form a closed door ring structure.

In some exemplary embodiments, the rocker reinforcement 4 is an extruded aluminum alloy member, and the lower end of the a-pillar reinforcement 1 and the lower end of the B-pillar reinforcement 2 are connected to the rocker reinforcement 4 by FDS.

The half door ring structure of the embodiment is suitable for being connected with the doorsill reinforcing part 4 formed by extruded aluminum alloy to form a vehicle body framework, and has wide applicability and good economic benefit.

The sill reinforcement 4 can be connected to the half-door ring structure by means of FDS, but can of course also be connected in other ways, which are not limited here. Such as: the sill reinforcement 4 may be a hot-formed stamped or rolled sheet metal part (e.g., a stainless steel part) and connected to the lower ends of the a-pillar reinforcement 1 and the B-pillar reinforcement 2 by spot welding.

As shown in fig. 4, the present embodiment provides a method for processing a side gusset, including:

s102: respectively and independently blanking and composing each part of the A-column reinforcing plate and the B-column reinforcing plate to obtain material sheets of each part of the A-column reinforcing plate and the B-column reinforcing plate;

s104: the method comprises the following steps of (1) forming a first material sheet assembly by laser tailor welding of material sheets of each part of the A-column reinforcing plate, and forming a second material sheet assembly by laser tailor welding of material sheets of each part of the B-column reinforcing plate;

s106: forming a material sheet assembly by performing laser tailor welding on the first material sheet assembly and the second material sheet assembly;

s108: and (3) forming the integrated semi-door ring structure by the sheet assembly through a hot forming and stamping process.

The side wall reinforcing plate can be processed and manufactured by the following method:

a) As shown in fig. 5-9, the a-pillar lower reinforcing plate 11, the a-pillar upper reinforcing plate 12, the B-pillar lower reinforcing plate 21, the B-pillar middle reinforcing plate 22, and the B-pillar upper reinforcing plate 23, which are parts of the a-pillar reinforcing plate 1 and the B-pillar reinforcing plate 2, are laid out and blanked separately, respectively, to obtain a material sheet 11a of the a-pillar lower reinforcing plate 11, a material sheet 12a of the a-pillar upper reinforcing plate 12, a material sheet 21a of the B-pillar lower reinforcing plate 21, a material sheet 22a of the B-pillar middle reinforcing plate 22, and a material sheet 23a of the B-pillar upper reinforcing plate 23;

b) Connecting the material sheet 11a of the A-pillar lower reinforcing plate 11 with the material sheet 12a of the A-pillar upper reinforcing plate 12 through a laser tailor welding technology to form a first material sheet assembly; connecting the material sheet 21a of the B-pillar lower reinforcing plate 21, the material sheet 22a of the reinforcing plate 22 in the B-pillar and the material sheet 23a of the B-pillar upper reinforcing plate 23 by a laser tailor welding technology to form a second material sheet assembly;

c) Connecting the first material sheet assembly and the second material sheet assembly through a laser tailor welding technology to form a material sheet assembly;

d) Forming an integrated half-door ring structure by the sheet assembly through a hot forming stamping process;

e) And carrying out laser trimming and hole opening on the integrated semi-door ring structure, and finally finishing the integrated semi-door ring structure finished product.

Under the condition that the A-pillar reinforcing plate 1 comprises the A-pillar reinforcing plate 13, the material sheet assembly and the A-pillar reinforcing plate 13 can be connected through traditional spot welding, and then the material sheet assembly fixed with the A-pillar reinforcing plate 13 is subjected to a hot forming and stamping process.

Compared with the scheme that the closed door ring structure is formed integrally by adopting laser tailor welding, the method for processing the side wall reinforcing plate of the half door ring structure adopts the closed size chain loop of the closed door ring material sheet when the closed door ring structure is formed integrally by adopting laser tailor welding, and needs to adopt curve tailor welding during laser tailor welding, so that a tailor welding fixture is needed for positioning during tailor welding, the tooling cost is high, and the generation efficiency is low; in the embodiment, the whole split welding is performed by laser to form the open half door ring structure, the size chain of the half door ring material sheet is not closed, the first material sheet component and the second material sheet component are formed by the split welding in a straight line split welding mode, and the first material sheet component and the second material sheet component are still formed by the straight line split welding mode when the material sheet assembly is formed by the split welding, so that the curve welding is not used during the split welding, a split welding clamp is not needed, the tool cost is reduced, and the generation efficiency is improved.

The side wall reinforcing plate of the half door ring structure of the embodiment balances the performance requirements of vehicle body safety, NVH, strength, light weight and the like in structural design, and adopts a relatively free laser tailor-welding process with small influence on the structure; materials with different materials and thicknesses are configured according to safety performance requirements of different areas of the side wall reinforcing plate, an A column reinforcing plate 13 is designed on the A column upper reinforcing plate 12 (connected with the A column upper reinforcing plate 12 in a spot welding mode), and design of a part joint structure is optimized; finally, through the hot forming technology, form half door ring structure of integral type hot forming, realize the integrated design of spare part to reduce the frock cost by a wide margin, promote production efficiency, subtract about 15% of weight.

In addition, the semi-door ring structure of the embodiment is based on a laser tailor-welding process in the manufacturing process, and after each part is subjected to sample arrangement and blanking independently, a semi-annular material sheet is formed, so that the material utilization rate is greatly improved; meanwhile, compared with an integral door ring structure in some cases, the size chains are closed, so that the positioning of a clamp is needed, and after the improvement, the size chains of a plurality of parts can be absorbed due to the design of the semi-annular material sheet, so that the laser connection can be completed without the support of a special material sheet clamp, and the tooling cost is reduced; after the laser tailor-welding is finished, a thermal forming process is adopted to form a half door ring structure, and when a die is designed, hydraulic lifting mechanisms are designed in the areas of the A column reinforcing plate 1 and the B column reinforcing plate 2 to realize synchronous lifting of the A column reinforcing plate 1 and the B column reinforcing plate 2, so that the distortion and deformation of parts are reduced, and finally, laser cutting and trimming and hole opening are performed to form an integral thermal forming half door ring structure product with controllable tolerance.

The embodiment also provides a vehicle, which comprises the side wall reinforcing plate assembly provided by any one of the above embodiments.

The vehicle may be an electric or hybrid vehicle or other type of vehicle.

To sum up, the side wall reinforcing plate of this application embodiment has following advantage:

1) The side wall reinforcing plate is an integrated half door ring structure formed by adopting a laser tailor-welding process, the materials and the thicknesses of different materials are designed in different areas, the spot welding lap joint area of parts is reduced, and the weight is reduced by about 15%;

2) The semi-portal ring structure integrates the A-column reinforcing plate and the B-column reinforcing plate into one part, the integrated design greatly reduces the tooling cost, the number of hot forming and cold stamping dies is reduced to 1 set/single side from 6 sets/single sides required by the portal ring structure in some cases, and the number of welding fixtures, welding robots and part checking tools is reduced to 2 sets/vehicle from 6 sets/vehicle in some cases;

3) The production efficiency is improved: welding points are reduced by 52/vehicle, and the welding beat of the base is improved; compared with the single-side 4-sequence cold stamping and 2 times of hot forming stamping working hours of the portal ring structure in some cases, the working hours are reduced to 1 time of hot forming stamping working hours;

4) The half door ring structure is optimized through blanking and typesetting, and the material utilization rate can be improved from 62% to over 75%; meanwhile, laser connection can be completed without the support of a special material sheet clamp, so that two pairs of material sheet clamps are reduced, and the tooling cost is further reduced;

5) Through mould optimal design, when getting, the regional department of B post reinforcing plate increases hydraulic lifting structure, with the regional synchronous lifting of A post reinforcing plate, avoids spare part distortion to guarantee the uniformity of half door ring product, control the tolerance precision of product.

Example two:

the embodiment provides a side wall reinforcing plate, which is mainly different from the side wall reinforcing plate in the first embodiment in that the side wall reinforcing plate further comprises a C-column reinforcing plate 5.

As shown in fig. 10, the side wall reinforcing plate of the present embodiment includes, in addition to the a-pillar reinforcing plate 1 and the B-pillar reinforcing plate 2, a C-pillar reinforcing plate 5,C pillar reinforcing plate 5 and a B-pillar reinforcing plate, which are connected by laser tailor welding to form an integrated M-shaped door ring structure.

According to the side wall reinforcing plate, an A column reinforcing plate 1, a B column reinforcing plate 2 and a C column reinforcing plate 5 are spliced and welded through laser, and then are subjected to hot stamping to form an integrated M-shaped door ring structure, the M-shaped door ring structure can be provided with two downward openings, wherein an opening facing towards is formed between the A column reinforcing plate 1 and the B column reinforcing plate 2, and an opening facing towards is formed between the B column reinforcing plate 2 and the C column reinforcing plate 5. The M-shaped door loop structure may be connected to the sill reinforcement 4 to form a side gusset assembly, and the sill reinforcement 4 may close off the two openings of the M-shaped door loop structure to form two closed door loop structures that may be used to support a front door and a rear door, respectively.

The M-shaped door ring structure is connected by laser tailor-welding, therefore, each part of the A-column reinforcing plate 1, the B-column reinforcing plate 2 and the C-column reinforcing plate 5 can be designed with different materials and thicknesses, namely, different materials and thicknesses can be designed in different areas of the side wall reinforcing plate according to actual requirements, so that the safety strength requirements of different positions of the M-shaped door ring structure are met, and the safety of a vehicle is ensured; the A column reinforcing plate 1, the B column reinforcing plate 2 and the C column reinforcing plate 5 are connected in a tailor welding manner, so that the lap joint area of spot welding of parts can be reduced, the integral weight reduction is realized, and the weight reduction of a vehicle is facilitated; the integrated design of the M-shaped door ring structure integrates other parts (an A column reinforcing plate, a B column reinforcing plate, a C column reinforcing plate 5 and the like) except the threshold reinforcing part in the closed door ring structure into one part, so that the tooling cost is greatly reduced, and the number of hot forming dies, cold stamping dies, welding fixtures, welding robots and part checking tools are reduced; the M-shaped gate ring structure reduces the number of welding spots, improves the welding rhythm, reduces the stamping working time and improves the production efficiency; the M-shaped gate ring structure can complete laser tailor-welding without the support of a special clamp, so that the number of required clamps is reduced, and the tooling cost is further reduced; the method of the embodiment that the M-shaped door ring structure is formed by laser tailor-welding and then connected with the threshold reinforcement 4 to form the closed door ring structure is beneficial to reducing tolerance accumulation, so that the consistency of M-shaped door ring products is ensured, and the tolerance precision of the products is controlled.

Therefore, the M-shaped door ring structure of this embodiment, when practicing thrift raw and other materials, can guarantee the thickness of each part, satisfy the safe strength requirement of M-shaped door ring different positions, guarantee the security of vehicle and alleviate the weight of vehicle.

In some exemplary embodiments, as shown in fig. 10, the C-pillar reinforcement plate 5 includes a C-pillar lower reinforcement plate 51 and a C-pillar upper reinforcement plate 52, a front end of the C-pillar upper reinforcement plate 52 is laser tailor welded to a rear end of the B-pillar upper reinforcement plate, and a lower end of the C-pillar upper reinforcement plate 52 is laser tailor welded to an upper end of the C-pillar lower reinforcement plate 51 to form an integrated M-shaped door ring structure.

In the C-pillar reinforcing plate 5, the lower end of a C-pillar lower reinforcing plate 51 is used for being connected with a threshold reinforcing part 4, the upper end of the C-pillar lower reinforcing plate 51 is in laser tailor welding with the lower end of a C-pillar upper reinforcing plate 52, and a laser welding parting 36 is formed; the front end of the C-pillar upper reinforcing plate 52 is laser tailor welded to the rear end of the B-pillar upper reinforcing plate 23, and a laser welding slit 35 is formed.

In some exemplary embodiments, the thickness of the a-pillar lower reinforcement plate 11 < the thickness of the a-pillar upper reinforcement plate 12.

In some exemplary embodiments, the yield strength of the a-pillar lower reinforcement plate 11 < the yield strength of the a-pillar upper reinforcement plate 12.

In some exemplary embodiments, the tensile strength of the a-pillar lower reinforcement plate 11 is < the tensile strength of the a-pillar upper reinforcement plate 12.

In some exemplary embodiments, the A-pillar lower reinforcement plate 11 is a steel plate and has a thickness of 1.1mm, a yield strength greater than 780MPa, and a tensile strength greater than 980MPa. For example, the type of steel used for the A-pillar lower gusset 11 may be CR780/980HS-AS.

The upper reinforcing plate 12 of the A column is a steel plate, the thickness of the upper reinforcing plate is 1.8mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the type of steel used for the A-pillar upper gusset 12 may be CR950/1300HS-AS.

Of course, the a-pillar reinforcement plate 1 may be spot-welded to the a-pillar upper reinforcement plate 12 as needed.

In some exemplary embodiments, the thickness of the B-pillar lower reinforcing plate 21 < the thickness of the B-pillar middle reinforcing plate 22 < the thickness of the B-pillar upper reinforcing plate 23.

In some exemplary embodiments, the yield strength of the B-pillar lower reinforcing plate 21 < the yield strength of the B-pillar middle reinforcing plate 22, and the yield strength of the B-pillar lower reinforcing plate 21 < the yield strength of the B-pillar upper reinforcing plate 23. Wherein the yield strength of the reinforcing plate 22 in the B-pillar may be equal to the yield strength of the reinforcing plate 23 on the B-pillar.

In some exemplary embodiments, the tensile strength of the B-pillar lower reinforcing plate 21 is < the tensile strength of the B-pillar middle reinforcing plate 22, and the tensile strength of the B-pillar lower reinforcing plate 21 is < the tensile strength of the B-pillar upper reinforcing plate 23. Wherein the tensile strength of the reinforcing plate 22 in the B-pillar may be equal to the tensile strength of the reinforcing plate 23 on the B-pillar.

In some exemplary embodiments, the B-pillar lower reinforcement plate 21 is a steel plate and has a thickness of 1.2mm, a yield strength greater than 350MPa, and a tensile strength greater than 500MPa. For example, the steel material used for the B-pillar lower gusset 21 may be CR350/500HS-AS.

The B column middle reinforcing plate 22 is a steel plate, the thickness of the B column middle reinforcing plate is 1.4mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the steel used for the reinforcement plate 22 in the B-pillar may be of the type CR950/1300HS-AS.

The B column upper reinforcing plate 23 is a steel plate, the thickness of the B column upper reinforcing plate is 1.6mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the steel material used for the reinforcement plate 23 on the B-pillar may be CR950/1300HS-AS. That is, the reinforcing plate 22 in the B-pillar and the reinforcing plate 23 on the B-pillar may be made of the same material, but have different thicknesses.

In some exemplary embodiments, the thickness of the C-pillar lower reinforcement plate 51 < the thickness of the C-pillar upper reinforcement plate 52.

In some exemplary embodiments, the yield strength of the C-pillar lower reinforcement plate 51 = the yield strength of the C-pillar upper reinforcement plate 52.

In some exemplary embodiments, the tensile strength of the C-pillar lower reinforcing plate 51 = the tensile strength of the C-pillar upper reinforcing plate 52.

In some exemplary embodiments, the C-pillar lower reinforcement plate 51 is a steel plate and has a thickness of 1.0mm, a yield strength greater than 950MPa, and a tensile strength greater than 1300MPa. For example, the C-pillar lower reinforcement plate 51 may be made of steel of the type CR950/1300HS-AS.

The C column upper reinforcing plate 52 is a steel plate, the thickness of the C column upper reinforcing plate is 1.2mm, the yield strength is greater than 950MPa, and the tensile strength is greater than 1300MPa. For example, the C-pillar upper stiffener plate 52 may be of the type CR950/1300HS-AS steel. That is, the C-pillar lower reinforcement plate 51 and the C-pillar upper reinforcement plate 52 may be made of the same material, but have different thicknesses.

Of course, the material, thickness, yield strength, tensile strength, and the like of the a-pillar lower reinforcement plate 11, the a-pillar upper reinforcement plate 12, the B-pillar lower reinforcement plate 21, the B-pillar middle reinforcement plate 22, the B-pillar upper reinforcement plate 23, the C-pillar lower reinforcement plate 51, and the C-pillar upper reinforcement plate 52 are not limited to those described above, and may be designed according to actual needs.

The side wall reinforcing plate of this embodiment forms M type door ring structure, and when getting in the course of working, the regional department of A post reinforcing plate 1, B post reinforcing plate 2 and C post reinforcing plate 5 can all be equipped with hydraulic pressure lifting structure to with synchronous lifting of A post reinforcing plate 1, B post reinforcing plate 2 and C post reinforcing plate 5, avoid spare part distortion. The embodiment provides a side wall reinforcing plate assembly, which comprises a threshold reinforcing part 4 and a side wall reinforcing plate, wherein the lower end of a column A reinforcing plate 1, the lower end of a column B reinforcing plate 2 and the lower end of a column C reinforcing plate 5 of the side wall reinforcing plate are connected with the threshold reinforcing part 4.

The lower end of the A-column reinforcing plate 1, the lower end of the B-column reinforcing plate 2 and the lower end of the C-column reinforcing plate 5 can be connected with a threshold reinforcing piece 4 formed by extruded aluminum alloy through FDS.

The M-shaped door ring structure of the embodiment is suitable for being connected with the doorsill reinforcing part 4 formed by extruded aluminum alloy to form a vehicle body framework, and has wide applicability and good economic benefit.

The sill reinforcement 4 can be connected to the M-shaped door ring structure by FDS, but can also be connected by other means, which are not limited here. Such as: the threshold reinforcement 4 may be a hot-formed stamped or rolled sheet metal member (e.g., a stainless steel member), and is connected to the lower ends of the a-pillar reinforcement 1, the B-pillar reinforcement 2, and the C-pillar reinforcement 5 by spot welding.

As shown in fig. 11, the present embodiment provides a method for processing a side gusset, including:

s202: respectively and independently blanking and composing each part of the A-column reinforcing plate, the B-column reinforcing plate and the C-column reinforcing plate to obtain material sheets of each part of the A-column reinforcing plate, the B-column reinforcing plate and the C-column reinforcing plate;

s204: the method comprises the following steps of forming a first material sheet assembly by laser tailor welding of material sheets of all parts of an A-column reinforcing plate, forming a second material sheet assembly by laser tailor welding of material sheets of all parts of a B-column reinforcing plate, and forming a third material sheet assembly by laser tailor welding of material sheets of all parts of a C-column reinforcing plate;

s206: the first material sheet assembly and the second material sheet assembly are subjected to laser tailor welding, and the second material sheet assembly and the third material sheet assembly are connected through the laser tailor welding to form a material sheet assembly;

s208: and (4) forming the integrated M-shaped door ring structure by the sheet assembly through a hot forming and stamping process.

The side wall reinforcing plate can be processed and manufactured by the following method:

a) Respectively and independently composing and blanking the components of the A column reinforcing plate 1, the B column reinforcing plate 2 and the C column reinforcing plate 5, namely the A column lower reinforcing plate 11, the A column upper reinforcing plate 12, the B column lower reinforcing plate 21, the B column middle reinforcing plate 22, the B column upper reinforcing plate 23, the C column lower reinforcing plate 51 and the C column upper reinforcing plate 52 to obtain a material sheet of the A column lower reinforcing plate 11, a material sheet of the A column upper reinforcing plate 12, a material sheet of the B column lower reinforcing plate 21, a material sheet of the B column middle reinforcing plate 22, a material sheet of the B column upper reinforcing plate 23, a material sheet of the C column lower reinforcing plate 51 and a material sheet of the C column upper reinforcing plate 52;

b) Connecting the material sheet of the lower A-column reinforcing plate 11 with the material sheet of the upper A-column reinforcing plate 12 by a laser tailor welding technology to form a first material sheet assembly; connecting the material sheet of the B-column lower reinforcing plate 21, the material sheet of the B-column middle reinforcing plate 22 and the material sheet of the B-column upper reinforcing plate 23 through a laser tailor welding technology to form a second material sheet assembly; connecting the material sheet of the C-column lower reinforcing plate 51 with the material sheet of the C-column upper reinforcing plate 52 by a laser tailor welding technology to form a third material sheet assembly;

c) Connecting the first material sheet assembly and the second material sheet assembly through a laser tailor welding technology, and connecting the second material sheet assembly and the third material sheet assembly through the laser tailor welding technology to form a material sheet assembly;

d) Forming an integrated M-shaped door ring structure by the sheet assembly through a hot forming and stamping process;

e) And carrying out laser trimming and hole opening on the integrated M-shaped door ring structure, and finally finishing the integrated M-shaped door ring structure finished product.

Compared with the scheme that the closed door ring structure is formed integrally by adopting laser tailor-welding, the method for processing the side wall reinforcing plate of the M-shaped door ring structure adopts the size chain closed loop of the closed door ring material sheet when the closed door ring structure is formed integrally by adopting laser tailor-welding, and needs to adopt curve tailor-welding during laser tailor-welding, so that a tailor-welding clamp is needed for positioning during tailor-welding, which results in high tool cost and low generation efficiency; in the embodiment, the laser tailor-welding is adopted to form the open M-shaped door ring structure, the size chain of the M-shaped door ring material sheet is not closed, the first material sheet component, the second material sheet component and the third material sheet component are in straight line tailor-welding when the first material sheet component, the second material sheet component and the third material sheet component are formed by tailor-welding, and the first material sheet component, the second material sheet component and the third material sheet component are still in straight line tailor-welding when the material sheet assembly is formed by tailor-welding, so that the curve welding is not used during tailor-welding, a tailor-welding clamp is not needed, the tool cost is reduced, and the generation efficiency is improved.

It should be understood that the connection between the components of the C-pillar reinforcement panel 5 and between the C-pillar reinforcement panel 5 and the B-pillar reinforcement panel 2 in the present embodiment is not limited to the laser tailor-welded connection, but may be made by other means, such as: the front end of the C-pillar upper reinforcement plate 52 is welded to the rear end of the B-pillar upper reinforcement plate 23, and the lower end of the C-pillar upper reinforcement plate 52 is spot-welded to the upper end of the C-pillar lower reinforcement plate 51 to form an M-shaped door ring structure having two openings facing downward.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims (10)

1. A side gusset, comprising: the reinforcing plate comprises an A-column reinforcing plate and a B-column reinforcing plate, wherein the A-column reinforcing plate and the B-column reinforcing plate are connected through laser tailor welding to form an integrated half door ring structure, and the half door ring structure is provided with a downward opening.

2. The side gusset plate of claim 1, wherein the A-pillar reinforcement plate comprises an A-pillar lower reinforcement plate and an A-pillar upper reinforcement plate, and the upper end of the A-pillar lower reinforcement plate is connected with the front end of the A-pillar upper reinforcement plate by means of laser tailor welding.

3. The side wall reinforcing plate according to claim 2, wherein the B-pillar reinforcing plate comprises a B-pillar upper reinforcing plate, a B-pillar middle reinforcing plate and a B-pillar lower reinforcing plate, the B-pillar upper reinforcing plate is T-shaped, the front end of the B-pillar upper reinforcing plate is connected with the rear end of the A-pillar upper reinforcing plate through laser tailor welding, the lower end of the B-pillar upper reinforcing plate is connected with the upper end of the B-pillar middle reinforcing plate through laser tailor welding, and the lower end of the B-pillar middle reinforcing plate is connected with the upper end of the B-pillar lower reinforcing plate through laser tailor welding;

the lower extreme of reinforcing plate under A post is equipped with the back portion of extending backward, reinforcing plate is the T shape of invering under B post, the front end of reinforcing plate under B post with form between the back portion of extending the opening.

4. The side gusset reinforcement panel of claim 3, wherein the thickness of the A-pillar lower reinforcement panel is < the thickness of the A-pillar upper reinforcement panel;

the thickness of the reinforcing plate under the B column is smaller than that of the reinforcing plate in the B column and smaller than that of the reinforcing plate on the B column.

5. The side gusset panel according to any one of claims 1 to 4, further comprising a C-pillar stiffener plate laser tailor welded to the B-pillar stiffener plate to form an integral M-shaped door ring structure having two openings facing downward.

6. The side gusset panel of claim 3, further comprising a C-pillar reinforcement plate comprising a C-pillar lower reinforcement plate and a C-pillar upper reinforcement plate, wherein the front end of the C-pillar upper reinforcement plate is connected with the rear end of the B-pillar upper reinforcement plate by laser tailor welding, and the lower end of the C-pillar upper reinforcement plate is connected with the upper end of the C-pillar lower reinforcement plate by laser tailor welding to form an integrated M-shaped door ring structure having two openings facing downward.

7. The side gusset of claim 3, further comprising a C-pillar reinforcement plate comprising a C-pillar lower reinforcement plate and a C-pillar upper reinforcement plate, wherein the front end of the C-pillar upper reinforcement plate is spot welded to the rear end of the B-pillar upper reinforcement plate, and wherein the lower end of the C-pillar upper reinforcement plate is spot welded to the upper end of the C-pillar lower reinforcement plate to form an M-shaped door ring structure having two openings facing downward.

8. A side gusset assembly comprising a side gusset and the side gusset of any one of claims 1 to 7, wherein the lower end of the a-pillar gusset and the lower end of the B-pillar gusset of the side gusset are connected to the side gusset.

9. The side gusset assembly of claim 8, wherein the side gusset is the side gusset of any one of claims 5 to 7, and a lower end of the C-pillar gusset of the side gusset is connected to the rocker reinforcement; wherein:

the doorsill reinforcement is an extrusion-molded aluminum alloy part, the side wall reinforcement plate is a steel plate, and the lower end of the A-column reinforcement plate, the lower end of the B-column reinforcement plate and the lower end of the C-column reinforcement plate are all connected with the doorsill reinforcement through hot-melt self-tapping screw connection FDS; or,

the doorsill reinforcement is a sheet metal part formed by hot forming punching or rolling, the side wall reinforcement plate is a steel plate, and the lower end of the A column reinforcement plate, the lower end of the B column reinforcement plate and the lower end of the C column reinforcement plate are connected with the doorsill reinforcement through spot welding.

10. A vehicle comprising a side gusset assembly of any of claims 8 through 9.

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