CN111169542A

CN111169542A - B-pillar reinforcing plate, manufacturing method thereof and B-pillar assembly

Info

Publication number: CN111169542A
Application number: CN202010030728.4A
Authority: CN
Inventors: 张雪亮
Original assignee: Aiways Automobile Shanghai Co Ltd
Current assignee: Aiways Automobile Co Ltd; Aiways Automobile Shanghai Co Ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-05-19
Anticipated expiration: 2040-01-13
Also published as: CN111169542B

Abstract

The invention relates to the technical field of vehicle structures, and provides a B-pillar reinforcing plate, a manufacturing method thereof and a B-pillar assembly. Wherein B post reinforcing plate includes: the outer-layer reinforcing plate is provided with a body extending along the first direction, the body is provided with lightening holes extending along the first direction, and the lightening holes avoid the bearing area of the B-column reinforcing plate; the inlayer reinforcing plate is laid in the inner wall of outer reinforcing plate through fibrous material, and the inlayer reinforcing plate is including laying in proper order along its thickness direction: the first base layer corresponding to the area where the body is located, the first reinforced layer corresponding to the area where the lightening holes are located, the second reinforced layer corresponding to the area where the lightening holes and the force bearing area are located and the second base layer corresponding to the area where the body is located. According to the invention, the lightening holes are formed in the outer-layer reinforcing plate, so that the B-column reinforcing plate is light; the inner-layer reinforcing plate is formed by multiple layers of variable-thickness fiber materials in a paving mode, lightening holes and bearing areas are reinforced, and the strength and the performance of the B-column reinforcing plate are improved.

Description

B-pillar reinforcing plate, manufacturing method thereof and B-pillar assembly

Technical Field

The invention relates to the technical field of vehicle structures, in particular to a B-pillar reinforcing plate, a manufacturing method thereof and a B-pillar assembly.

Background

Vehicle safety is very important for vehicle construction. In a vehicle side collision scene, the B column is mainly used for bearing force, so that the vehicle is prevented from generating large deformation, and the safety of passengers is protected.

The basic structure of the B column comprises a column inner plate and a reinforcing plate, wherein the reinforcing plate is a main force bearing part. The reinforcing plate adopts hot forming steel or high strength aluminum plate stamping forming more, and its mainstream design includes: the thickness of the plate is completely equal; rolling the equal-thickness plate into a continuous variable-thickness plate according to the thickness requirement by using a rolling mill; welding plates with different thicknesses into a whole by using a laser technology, and then carrying out hot stamping; welding two plates with different shapes and sizes, and performing integrated hot stamping forming and quenching; and local martensite transformation is controlled by heating in the die, so that the same plate with different strengths is formed.

Along with the higher and higher requirements on the safety of the vehicle, the reinforcing plates of the above mainstream designs have higher and higher weights, so that the fuel consumption of the vehicle is increased, and the requirements on energy conservation and emission reduction cannot be met.

It is to be noted that the information applied in the above background section is only for enhancing the understanding of the background of the present invention, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

In view of this, the invention provides a B-pillar reinforcement plate, a manufacturing method thereof, and a B-pillar assembly, which satisfy vehicle performance and achieve weight reduction of a B-pillar.

One aspect of the present invention provides a B-pillar reinforcement panel, comprising: the outer-layer reinforcing plate is provided with a body extending along a first direction, the body is provided with lightening holes extending along the first direction, and the lightening holes avoid a bearing area of the B-pillar reinforcing plate; the inlayer reinforcing plate, through fibrous material shop paste in the inner wall of outer layer reinforcing plate, the inlayer reinforcing plate includes in proper order along its thickness direction: the first base layer is paved on the inner wall of the outer layer reinforcing plate and corresponds to the area where the body is located; a first reinforced layer which is laid on the first foundation layer and corresponds to the area where the lightening hole is located; the second reinforced paving layer is paved on the first reinforced paving layer and corresponds to the area where the lightening hole and the bearing area are located; and the second base layer is paved on the second reinforced paving layer and corresponds to the area of the body.

In some embodiments, the inner-layer reinforcing plate and the outer-layer reinforcing plate are bonded through structural adhesive, the structural adhesive is matched with the inner-layer reinforcing plate in shape, and openings corresponding to the lightening holes are formed in the structural adhesive; the outer reinforcing plate is connected with the inner reinforcing plate through a mechanical connecting piece penetrating through the outer reinforcing plate, the structural adhesive and the inner reinforcing plate.

In some embodiments, the first base ply, the first reinforced ply, the second reinforced ply, and the second base ply each comprise a multi-layer ply; the number of paving layers of the first reinforced paving layer or the second reinforced paving layer is more than or equal to that of the first basic paving layer or the second basic paving layer.

In some embodiments, a first hinge reinforcement plate is welded to a middle region of the outer reinforcement plate, and a second hinge reinforcement plate is welded to a lower region of the outer reinforcement plate; the first hinge reinforcing plate and the second hinge reinforcing plate are close to the bearing area, and the lightening holes are located above the first hinge reinforcing plate.

In some embodiments, the material of the outer layer reinforcing plate is a metal material, and the outer layer reinforcing plate is formed by stamping; the inner-layer reinforcing plate is made of a carbon-glass fiber composite material, wherein the ratio of carbon fibers to glass fibers is 5: 1-1: 5, and the carbon-glass fiber composite material is formed by weaving and mixing through a weaving process.

In some embodiments, both ends of the inner-layer reinforcing plate are flush with both ends of the outer-layer reinforcing plate respectively, or both ends of the inner-layer reinforcing plate are shorter than both ends of the outer-layer reinforcing plate, both ends of the outer-layer reinforcing plate further include extension regions respectively extending perpendicular to the first direction, and both ends of the B-pillar reinforcing plate are connected with an a-pillar roof rail reinforcing plate and a side sill beam of the vehicle respectively; the cross section of the body of the outer reinforcing plate is U-shaped and provided with a flange, and the inner reinforcing plate is paved and attached to the inner wall of the U-shaped area of the body.

Another aspect of the present invention provides a method for manufacturing a B-pillar reinforcement plate, including: forming an outer-layer reinforcing plate, wherein the outer-layer reinforcing plate is provided with a body extending along a first direction, the body is provided with lightening holes extending along the first direction, and the lightening holes avoid a bearing area of the B-column reinforcing plate; paving fiber materials on the inner wall of the outer layer reinforcing plate, wherein the fiber materials comprise: paving a first basic paving layer on the inner wall of the outer layer reinforcing plate corresponding to the area of the body; paving a first reinforced paving layer on the first foundation paving layer corresponding to the area where the lightening hole is located; paving a second reinforced paving layer on the first reinforced paving layer corresponding to the lightening holes and the area where the bearing area is located; paving a second basic layer on the second reinforced layer corresponding to the area of the body; and solidifying and forming the fiber material by a Resin Transfer Molding (RTM) process or a high-pressure resin transfer molding (HP-RTM) process to form the inner-layer reinforcing plate.

In some embodiments, the above manufacturing method further includes: before the fiber materials are paved, forming structural adhesive which is matched with the inner-layer reinforcing plate in shape and is provided with openings corresponding to the lightening holes on the inner wall of the outer-layer reinforcing plate, paving the first foundation paving layer on the structural adhesive, and adhering the inner-layer reinforcing plate to the outer-layer reinforcing plate through the structural adhesive; after the fiber material is paved, the outer reinforcing plate and the inner reinforcing plate are connected through a mechanical connecting piece penetrating through the outer reinforcing plate, the structural adhesive and the inner reinforcing plate.

In some embodiments, the first base ply, the first reinforced ply, the second reinforced ply, and the second base ply are each formed from a plurality of layup plies; when the first basic layer, the second basic layer and the second reinforced layer are paved, the paving angles of all the paving layers are sequentially 0 degrees and 90 degrees alternately; and when the first reinforced paving layer is paved, paving angles of all paving layers are sequentially alternated at 45 degrees and 45 degrees below zero.

In some embodiments, the above manufacturing method further includes: before the fiber material is paved, a first hinge reinforcing plate is welded in the middle area of the outer layer reinforcing plate, a second hinge reinforcing plate is welded in the lower area of the outer layer reinforcing plate, the first hinge reinforcing plate and the second hinge reinforcing plate are close to the bearing area, and the lightening holes are located above the first hinge reinforcing plate.

In some embodiments, the outer-layer reinforcing plate is formed by punching a metal material, the inner-layer reinforcing plate is formed by weaving a carbon-glass fiber composite material through a weaving process, and the ratio of carbon fiber to glass fiber in the carbon-glass fiber composite material is 5: 1-1: 5.

Yet another aspect of the present invention provides a B-pillar assembly comprising: the B-pillar stiffener of any of the above embodiments; and the B column inner plate is arranged on the inner wall of the B column reinforcing plate and is connected with the B column reinforcing plate through a first hinge reinforcing plate and a second hinge reinforcing plate which are welded on the body of the outer layer reinforcing plate.

Compared with the prior art, the invention has the beneficial effects that:

lightening holes are formed in the outer-layer reinforcing plate, so that the B-column reinforcing plate is lightened;

the inner-layer reinforcing plate is formed by multiple layers of variable-thickness fiber materials in a paving mode, the fiber materials are high in strength, lightening holes and bearing areas are reinforced, and the strength and the performance of the B-column reinforcing plate are improved;

through the combination of the outer reinforcing plate and the inner reinforcing plate, the performance of the B column reinforcing plate is not reduced, the light weight can be realized, the oil consumption of a vehicle is reduced, and the emission is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic structural diagram of a B-pillar stiffener according to an embodiment of the present invention;

FIG. 2 is an exploded view of a B-pillar stiffener according to an embodiment of the present invention;

3 FIG. 3 3 3 shows 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3' 3 of 3 FIG. 31 3; 3

FIG. 4 shows an enlarged schematic view of the dashed box A' in FIG. 3;

FIG. 5 is a schematic structural view of an inner reinforcing plate in an embodiment of the present invention;

FIG. 6 shows a schematic of a lay-up of an inner layer doubler in an embodiment of the invention;

FIG. 7 shows a schematic cross-sectional view taken along line B-B' of FIG. 5;

FIG. 8 shows a schematic cross-sectional view of section line C-C' of FIG. 5;

FIG. 9 shows a schematic cross-sectional view taken along line D-D' of FIG. 5;

FIG. 10 shows a schematic cross-sectional view of section E-E' of FIG. 1;

FIG. 11 shows a schematic cross-sectional view taken along section line F-F' in FIG. 1;

FIG. 12 shows a schematic cross-sectional view of section line G-G' in FIG. 1;

FIG. 13 is a schematic view showing the attachment of a B-pillar stiffener to a vehicle component in an embodiment of the present invention;

FIG. 14 shows a schematic cross-sectional view of section H-H' of FIG. 13; and

FIG. 15 is a cross-sectional view of the section line I-I' in FIG. 13

FIG. 16 is a schematic diagram illustrating steps of a method for manufacturing a B-pillar stiffener according to an embodiment of the present invention;

FIG. 17 is a schematic structural view of a B-pillar assembly in an embodiment of the present invention; and

FIG. 18 shows an exploded view of a B-pillar assembly in an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

FIG. 1 shows a structure of a B-pillar reinforcement in an embodiment, FIG. 2 shows an exploded structure of the B-pillar reinforcement in the embodiment, FIG. 5 shows a structure of an inner reinforcement in the embodiment, and FIG. 6 shows a lay-up structure of the inner reinforcement in the embodiment. Referring to fig. 1, 2, 5 and 6, in some embodiments, the B-pillar stiffener 1 includes: the outer-layer reinforcing plate 11 is provided with a body 110 extending along the first direction X, the body 110 is provided with lightening holes 111 extending along the first direction X, and the lightening holes 111 avoid a bearing area 112 of the B-pillar reinforcing plate 1. Inner reinforcing plate 12, through the inner wall of fibrous material shop paste in outer reinforcing plate 11, inner reinforcing plate 12 includes in proper order along its thickness direction: a first base layer 121 which is paved on the inner wall of the outer layer reinforcing plate 11 and corresponds to the area of the body 110; a first reinforced layer 122 which is laid on the first base layer 121 and corresponds to the area where the lightening hole 111 is located; a second reinforced paving layer 123 which is paved on the first reinforced paving layer 122 and corresponds to the areas where the lightening holes 111 and the bearing areas 112 are positioned; and a second base ply 124 applied to the second reinforced ply 123 and corresponding to the area of the body 110.

Wherein, when the B-pillar reinforcement panel 1 is applied to a vehicle, the first direction X corresponds to a body height direction of the vehicle, that is, corresponds to a vertical direction. Of course, depending on the structural design of the vehicle, when the B-pillar is at a slight angle to the vertical, the first direction X will also be slightly changed accordingly. The force bearing area 112 of the B-pillar reinforcing plate 1 can be obtained according to CAE (Computer aided engineering) analysis. The load bearing region 112 is generally located in the middle to lower region of the B-pillar reinforcement panel 1 and bears the main load during a vehicle collision. The B-pillar reinforcement plate 1 of the embodiment is provided with the lightening holes 111 through the outer-layer reinforcement plate 11, and the lightening holes 111 extend along the first direction X without changing the connection mode of the outer-layer reinforcement plate 11 and peripheral components; the outer layer reinforcing plate 11 is usually made of sheet metal, and the weight proportion of the sheet metal can be reduced through the arrangement of the lightening holes 111, so that the lightweight of the B-pillar reinforcing plate 1 is realized. The inner-layer reinforcing plate 12 is formed by multiple layers of paving and pasting of fiber materials with variable thicknesses, the fiber materials are high in strength, and the lightening holes 111 and the bearing area 112 are reinforced in a multiple-layer paving and pasting mode, so that the strength and the performance of the B-pillar reinforcing plate 1 are improved; and the weight of the fiber material is low, the weight of the B-pillar reinforcing plate 1 can be reduced by more than 20%, and the light weight effect is obvious. Through the combination of the outer-layer reinforcing plate 11 and the inner-layer reinforcing plate 12, the performance of the B-column reinforcing plate 1 is not reduced, the light weight can be realized, the oil consumption of a vehicle is reduced, and the emission is reduced.

3 fig. 3 3 3 shows 3 a 3 cross 3- 3 sectional 3 view 3 along 3 the 3 line 3 a 3- 3 a 3' 3 in 3 fig. 31 3, 3 and 3 fig. 3 4 3 shows 3 an 3 enlarged 3 view 3 of 3 the 3 dashed 3 line 3 a 3 ″ 3 in 3 fig. 3 3 3, 3 in 3 combination 3 with 3 fig. 31 3 to 3 4 3, 3 in 3 some 3

embodiments

3, 3 the 3 inner 3- 3 layer 3 reinforcing 3 plate 3 12 3 and 3 the 3 outer 3- 3 layer 3 reinforcing 3 plate 3 11 3 are 3 bonded 3 together 3 by 3 a 3 structural 3 adhesive 3 13 3, 3 and 3 the 3 structural 3 adhesive 3 13 3 is 3 matched 3 to 3 the 3 shape 3 of 3 the 3 inner 3- 3 layer 3 reinforcing 3 plate 3 12 3 and 3 is 3 provided 3 with 3 an 3 opening 3 131 3 corresponding 3 to 3 the 3 lightening 3 hole 3 111 3. 3 The structural adhesive 13 has high strength, can bear larger load, is aging-resistant, fatigue-resistant, corrosion-resistant and stable in performance, is suitable for bonding strong structural members, contributes to improving the adhesive force between the inner-layer reinforcing plate 12 and the outer-layer reinforcing plate 11, and improves the strength of the whole B-column reinforcing plate 1. In other embodiments, the structural adhesive 13 may be replaced by other adhesives that can achieve the adhesion between the inner-layer reinforcing plate 12 and the outer-layer reinforcing plate 11. Further, besides the bonding of the structural adhesive 13, a small amount of mechanical connecting pieces 14 can be added in an auxiliary manner, and the mechanical connecting pieces 14 penetrate through the outer-layer reinforcing plate 11, the structural adhesive 13 and the inner-layer reinforcing plate 12 to enhance the connecting strength between the inner-layer reinforcing plate 12 and the outer-layer reinforcing plate 11. The mechanical connectors 14 include, for example, pull rivets, self-piercing rivets SPR, bolts, and the like.

In some embodiments, the first base ply 121, the first reinforced ply 122, the second reinforced ply 123, and the second base ply 124 each comprise a plurality of ply layers. Further, the number of paving layers of the first reinforced paving layer 122 or the second reinforced paving layer 123 is greater than or equal to the number of paving layers of the first base paving layer 121 or the second base paving layer 124. For example, the first and second reinforced plies 122, 123 each comprise four layers and the first and second base plies 121, 124 each comprise three layers to achieve reinforcement in the area corresponding to the weight-reducing holes 111 and the area corresponding to the messenger area 112. As another example, the first reinforced ply 122 may include four layers, and the second reinforced ply 123, the first base ply 121, and the second base ply 124 may each include three layers, again to provide localized reinforcement to the areas corresponding to the weight-reducing holes 111 and the load-bearing areas 112.

FIG. 7 shows a cross-sectional view of section B-B 'of FIG. 5, with reference to FIGS. 1, 2, and 5-7, and the dashed box B' of FIG. 7 shows an enlarged view of the ply structure in this region. In the area corresponding to the lightening hole 111, the inner-layer reinforcing plate 12 sequentially comprises a first base ply 121, a first reinforced ply 122, a second reinforced ply 123 and a second base ply 124 along the thickness direction. The area corresponding to the lightening hole 111 is the area with the largest thickness of the inner-layer reinforcing plate 12, so that on one hand, the strength reduction of the area caused by the lightening hole 111 can be reinforced; on the other hand, the width of the whole B-pillar reinforcement plate 1 increases from top to bottom along the first direction X, and the width of the area corresponding to the lightening hole 111 is smaller, which results in smaller strength, so that the thickness of the inner-layer reinforcement plate 12 in the area is the largest, and the strength of the area can be reinforced by the thickness.

FIG. 8 shows a cross-sectional representation of the cross-section line C-C' of FIG. 5, taken in conjunction with FIGS. 1, 2, 5, 6 and 8, and an enlarged representation of the ply structure of this region shown by the dashed box C "in FIG. 8. In the area corresponding to the messenger area 112, the inner layer reinforcing plate 12 sequentially comprises a first basic layer 121, a second reinforced layer 123 and a second basic layer 124 along the thickness direction. The corresponding area of the bearing area 112 is the area with the second largest thickness of the inner-layer reinforcing plate 12, so that the bearing area 112 of the B-pillar reinforcing plate 1 is locally reinforced, and the strength and the anti-collision performance of the whole B-pillar reinforcing plate 1 are improved.

FIG. 9 shows a cross-sectional representation of section line D-D' in FIG. 5, with reference to FIGS. 2, 5, 6 and 9, and an enlarged representation of the ply structure in this region shown by dashed box D "in FIG. 9. The inner reinforcement panel 12 includes a first foundation mat 121 and a second foundation mat 124 in its thickness direction corresponding to the area of the body 110 of the outer reinforcement panel 11 excluding the lightening holes 111 and the messenger area 112. The first and second base plies 121, 124 form the basic shape of the inner layer doubler 12, evenly covering the area of the body 110 of the outer layer doubler 11.

In some embodiments, the number of plies of each of the first base ply 121, the first reinforced ply 122, the second reinforced ply 123, and the second base ply 124 shown in FIGS. 7-9 may be adjusted as required by the part performance design and is not limited to that shown.

In some embodiments, the material of the outer layer reinforcing plate 11 is a metal material, and the outer layer reinforcing plate 11 is formed by press molding. The inner-layer reinforcing plate 12 is made of a carbon-glass fiber composite material, wherein the ratio of carbon fibers to glass fibers is 5: 1-1: 5, for example, the ratio of carbon fibers to glass fibers is 5:1, 3:1, 1:2, 1:4, 1:5, and the like, and the carbon-glass fiber composite material is formed by mixing woven fabrics through a weaving process. Carbon fiber materials are low in density, typically only 20% of steel and 50% of aluminum; the tensile strength is high, generally 3500 MPa-6500 MPa, which is more than 2 times of that of steel and aluminum; the modulus is high; the creep becomes low; the designability is strong, and the carbon fiber type is multiple, the resin type is multiple, and the layered structure is variable; the corrosion resistance is strong. However, the carbon fiber material is relatively expensive, so the carbon fiber and the glass fiber are mixed to form the carbon-glass fiber composite material, the tensile strength of the glass fiber is usually 1000MPa to 3000MPa, and the cost is lower than that of the carbon fiber. The carbon fiber and glass fiber composite material is prepared by mixing and weaving two kinds of fiber yarns of carbon fiber and glass fiber according to the proportion of 5: 1-1: 5, namely alternately mixing through a weaving process and paving, and can take both performance and cost into consideration. In other embodiments, the fiber material is not limited to the carbon-glass fiber composite material described above, and fiber filament types and tows may be varied, such as using only carbon fibers, using only glass fibers, or mixed with other types of fibers, such as basalt fibers, and the like.

Fig. 11 shows a cross-sectional illustration of the cross-section line F-F 'in fig. 1 and fig. 12 shows a cross-sectional illustration of the cross-section line G-G' in fig. 1, in combination with fig. 1, 2, 11 and 12, in some embodiments the outer skin 11 has a first hinge stiffener 15 welded to a middle region and a second hinge stiffener 16 welded to a lower region. The first hinge reinforcing plate 15 and the second hinge reinforcing plate 16 are used to reinforce the connection rigidity and strength of the door hinge mounting. The lightening holes 111 are located above the first hinge reinforcing plate 15, and the force bearing area 112 is located near the first hinge reinforcing plate 15 and the second hinge reinforcing plate 16. That is, the first hinge reinforcement plate 15 and the second hinge reinforcement plate 16 are both disposed adjacent to the force bearing area 112, for example, the first hinge reinforcement plate 15 and the second hinge reinforcement plate 16 are shown disposed in the upper region and the lower region of the force bearing area 112, respectively. The first hinge reinforcing plate 15 and the second hinge reinforcing plate 16 are used for being connected with the door hinge, and in other embodiments, the positions of the first hinge reinforcing plate 15 and the second hinge reinforcing plate 16 can be adjusted correspondingly and are arranged in other areas near the bearing area 112, so long as the connection rigidity and strength for reinforcing the door hinge installation can be realized, which is suitable for different vehicle types and door structures. Further, fig. 10 shows a cross-sectional view of the cross-section line E-E' in fig. 1, and in conjunction with fig. 1 and 10, a rivet bolt 17 and other parts can be added to the B-pillar stiffener 1 for mounting the B-pillar stiffener 1 to other parts of the vehicle.

Further, in some embodiments, as shown in fig. 1 to 3, two ends of the inner reinforcing plate 12 are flush with two ends of the outer reinforcing plate 11, respectively, two ends of the outer reinforcing plate 11 further include extension regions extending perpendicular to the first direction X, respectively, and the entire outer reinforcing plate 11 is "i" shaped, so as to facilitate the connection of the B-pillar reinforcing plate 1 with other components of the vehicle through the two ends, respectively. In other embodiments, the ends of the inner layer reinforcing plate 12 may be slightly shorter than the ends of the outer layer reinforcing plate 11. The cross-section of the body 110 of the outer reinforcing plate 11 is U-shaped and has a flange so as to be connected with other parts of the vehicle through the flange, and the inner reinforcing plate 12 is paved on the inner wall of the U-shaped area of the body 110, is positioned inside the flange of the outer reinforcing plate 11 and is used for removing the part of the sealing seam allowance of the vehicle door.

FIG. 13 is a schematic view showing the connection of a B-pillar reinforcement to a vehicle component in the embodiment, FIG. 14 is a schematic view showing a cross section taken along line H-H 'in FIG. 13, and FIG. 15 is a schematic view showing a cross section taken along line I-I' in FIG. 13. Referring to fig. 1 and 13 to 15, the two ends of the B-pillar stiffener 1 are connected to the a-pillar roof side rail stiffener 3 and the side sill 4 of the vehicle, respectively, to form a side gusset assembly. Wherein, the two ends of the inner layer reinforcing plate 12 of the B-pillar reinforcing plate 1 are flush with the two ends of the outer layer reinforcing plate 11, and are connected with the A-pillar upper edge beam reinforcing plate 3 and the side wall threshold beam 4 together. The connection mode of the B-pillar reinforcing plate 1, the A-pillar upper edge beam reinforcing plate 3 and the side wall threshold beam 4 can be spot welding, self-piercing riveting SPR, hot melting self-tapping FDS and the like. For example, a dashed box H "shows that the B-pillar stiffener 1 and the A-pillar roof rail stiffener 3 are connected by spot welding, and a dashed box I" shows that the B-pillar stiffener 1 and the side sill beam 4 are connected by self-piercing-riveting SPR or hot-melt self-tapping FDS.

The B-pillar reinforcing plate 1 in the above embodiment is completely paved in the whole structural area of the B-pillar reinforcing plate 1 by using the characteristics of fiber material paving, the middle bearing area 112 is added with paving reinforcement, and the upper lightening hole 111 area is locally added with paving reinforcement, so that the fiber material variable thickness paving is realized. The variable thickness of the fiber material can be realized when the fiber material is paved, and the later processing cost is not required to be increased if the variable thickness of the metal material is adopted. On the premise of not changing the connection mode of the B-pillar reinforcing plate 1 and peripheral components, the outer-layer reinforcing plate 11 is provided with lightening holes 111 to reduce the weight proportion of sheet metal, optimize the fiber material cutting and paving structure of the inner-layer reinforcing plate 12 and achieve the maximization of lightening. Through outer reinforcing plate 11 and inlayer reinforcing plate 12 combining together, fibrous material and sheet metal connected are as an organic whole, and the B post reinforcing plate 1 that the design developed many materials mixes both has guaranteed that B post reinforcing plate 1's performance does not reduce, has realized the lightweight again, makes product property ability and lightweight accomplish the best.

Fig. 16 shows the main steps of the method for manufacturing the B-pillar reinforcement in the embodiment, which are used for manufacturing the B-pillar reinforcement 1 described in any of the above embodiments. Referring to fig. 1, 2, 6 and 16, the method for manufacturing the B-pillar reinforcement plate 1 mainly includes: in step S20, forming an outer-layer reinforcing plate 11, such that the outer-layer reinforcing plate 11 has a body 110 extending along the first direction X, where the body 110 is provided with lightening holes 111 extending along the first direction X, and the lightening holes 111 avoid the bearing area 112 of the B-pillar reinforcing plate 1; in step S40, a fibrous material is applied to the inner wall of the outer-layer reinforcing plate 11, including the sub-steps of: s402, paving a first basic paving layer 121 on the inner wall of the outer layer reinforcing plate 11 corresponding to the area where the body 110 is located; s404, paving a first reinforced paving layer 122 on the first foundation paving layer 121 corresponding to the area where the lightening hole 111 is located; s406, paving a second reinforced layer 123 on the first reinforced layer 122 corresponding to the areas where the lightening holes 111 and the bearing areas 112 are located; s408, paving a second foundation layer 124 on the second reinforced layer 123 corresponding to the area where the body 110 is located; and in step S400, the fiber material is cured and shaped by a resin transfer molding RTM process or a high pressure resin transfer molding HP-RTM process to form the inner-layer reinforcing sheet 12. I.e. the fibre material is cured after the lay-up is completed, to form the inner reinforcing sheet 12.

In the manufacturing method, the inner-layer reinforcing plate 12, the reinforcing lightening holes 111 and the bearing area 112 are formed by paving and pasting fiber materials in a variable-thickness multilayer manner, so that the strength and the performance of the B-pillar reinforcing plate 1 are improved, and meanwhile, the weight is reduced. The principle and function of the structure manufactured by the steps in the manufacturing method can be all referred to the B-pillar reinforcement plate 1 described in any of the above embodiments, and the description is not repeated here.

In some embodiments, the outer reinforcing plate 11 is formed by punching a metal material, such as a steel plate or an aluminum plate, and the inner reinforcing plate 12 is formed by weaving a carbon-glass fiber composite material in a weaving process, wherein the ratio of carbon fiber to glass fiber in the carbon-glass fiber composite material is 5: 1-1: 5.

The manner of making the inner layer stiffener 12 will be described below by way of example with a carbon glass fiber lay-up scheme and a production process. With reference to fig. 5 to 9, and table 1 below:

TABLE 1

Sequence of layering	Material	Ply Angle/°	Layer structure
				P001	Carbon fiber and glass fiber mixed fabric	0	First base mat 121
P002	Carbon fiber and glass fiber mixed fabric	90	First base mat 121
				P003	Carbon fiber and glass fiber mixed fabric	0	First base mat 121
P004	Carbon fiber and glass fiber mixed fabric	45	First reinforced ply 122
				P005	Carbon fiber and glass fiber mixed fabric	-45	First reinforced ply 122
P006	Carbon fiber and glass fiber mixed fabric	45	First reinforced ply 122
				P007	Carbon fiber and glass fiber mixed fabric	-45	First reinforced ply 122
P008	Carbon fiber and glass fiber mixed fabric	90	Second reinforced ply 123
				P009	Carbon fiber and glass fiber mixed fabric	0	Second reinforced ply 123
P010	Carbon fiber and glass fiber mixed fabric	90	Second reinforced ply 123
				P011	Carbon fiber and glass fiber mixed fabric	0	Second base layup 124
P012	Carbon fiber and glass fiber mixed fabric	90	Second base layup 124
				P013	Carbon fiber and glass fiber mixed fabric	0	Second base layup 124

A first base layer 121, a first reinforced layer 122, a second reinforced layer 123 and a second base layer 124 are sequentially paved on the inner wall of the outer layer reinforced plate 11. The first base layer 121 comprises three layers P001-P003, wherein the layer angle of each layer of the layer is sequentially 0 degree and 90 degrees alternately; the first reinforced ply 122 comprises four layers P004-P007, wherein ply angles of each layer of ply-bonding layer alternate with 45 degrees and-45 degrees in sequence; the second reinforced ply 123 comprises three layers of P008-P010, wherein the ply angles of the ply layers of each layer alternate between 0 degree and 90 degree in sequence; the second base ply 124 includes three layers P011-P013, wherein the ply angles of each ply are sequentially alternated between 0 and 90 degrees. It should be noted that the ply sequence, materials, ply angles and ply structure listed in table 1 are only one example of the application of the present invention to actual production, and in other embodiments, the ply structure of the inner-layer reinforcing plate 12 is not limited to the above list, and the ply numbers, ply angles and ply sequence of the first base ply 121, the first reinforced ply 122, the second reinforced ply 123 and the second base ply 124 may be adjusted according to the design requirements of the part performance. In addition, the curing resin used to cure the fiber material can also be adjusted according to the part performance design requirements.

Further, as shown in fig. 2 to 4, before the fiber material is spread and adhered to form the inner-layer reinforcing plate 12, a structural adhesive 13 which is matched with the shape of the inner-layer reinforcing plate 12 and provided with openings 131 corresponding to the lightening holes 111 is formed on the inner wall of the outer-layer reinforcing plate 11, so that the first base layer 121 is spread and adhered to the structural adhesive 13, and the inner-layer reinforcing plate 12 is adhered to the outer-layer reinforcing plate 11 through the structural adhesive 13; after the inner reinforcing sheet 12 is formed by laying a fibrous material, the connection of the outer reinforcing sheet 11 and the inner reinforcing sheet 12 is reinforced by a mechanical connecting member 14 penetrating the outer reinforcing sheet 11, the structural adhesive 13 and the inner reinforcing sheet 12.

Further, as shown in fig. 1, fig. 2, fig. 11 and fig. 12, before the fiber material is applied to form the inner-layer reinforcing plate 12, the first hinge reinforcing plate 15 is welded (e.g., spot-welded) to the middle region of the outer-layer reinforcing plate 11, the second hinge reinforcing plate 16 is welded (e.g., spot-welded) to the lower region of the outer-layer reinforcing plate 11, such that the first hinge reinforcing plate 15 and the second hinge reinforcing plate 16 are located near the bearing region 112 and near the bearing region 112, for example, located above and below the bearing region 112, respectively, and the lightening holes 111 are located above the first hinge reinforcing plate 15. By welding the first hinge reinforcement plate 15 and the second hinge reinforcement plate 16 first and then laying the inner reinforcement plate 12, high temperature damage of spot welding to the fiber composite material can be avoided.

In the manufacturing method, the fiber composite material and the metal material are mixed and connected to manufacture the lightweight and high-strength B-pillar reinforcing plate 1. The outer-layer reinforcing plate 11 is provided with lightening holes 111 avoiding a bearing area 112, so that sheet metal materials are reduced, and the weight of the B-pillar reinforcing plate 1 is reduced; the inner-layer reinforcing plate 12 is paved and adhered with the carbon fiber glass fiber in a variable thickness manner to reinforce the lightening holes 111 and the force bearing area 112, so that the strength and the performance of the B-pillar reinforcing plate 1 are improved; through outer reinforcing plate 11 and the combination of inlayer reinforcing plate 12, realize the lightweight when making 1 intensity of B post reinforcing plate and performance promotion to reduce oil consumption reduces and discharges.

An embodiment of the present invention further provides a B-pillar assembly, where fig. 17 shows a structure of the B-pillar assembly, fig. 18 shows an explosive structure of the B-pillar assembly, and in conjunction with fig. 1, 17, and 18, the B-pillar assembly includes: the B-pillar reinforcement plate 1, the structural principle of the B-pillar reinforcement plate 1 can refer to the description of any of the above embodiments; and the B-pillar inner plate 2 is arranged on the inner wall of the B-pillar reinforcing plate 1, and the B-pillar inner plate 2 is connected with the B-pillar reinforcing plate 1 through a first hinge reinforcing plate 15 and a second hinge reinforcing plate 16 which are welded on the outer-layer reinforcing plate 11. The B post assembly of this embodiment can realize overall structure's lightweight and intensity promotion.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A B-pillar stiffener, comprising:

the outer-layer reinforcing plate is provided with a body extending along a first direction, the body is provided with lightening holes extending along the first direction, and the lightening holes avoid a bearing area of the B-pillar reinforcing plate;

the inlayer reinforcing plate, through fibrous material shop paste in the inner wall of outer layer reinforcing plate, the inlayer reinforcing plate includes in proper order along its thickness direction:

the first base layer is paved on the inner wall of the outer layer reinforcing plate and corresponds to the area where the body is located;

a first reinforced layer which is laid on the first foundation layer and corresponds to the area where the lightening hole is located;

the second reinforced paving layer is paved on the first reinforced paving layer and corresponds to the area where the lightening hole and the bearing area are located; and

and the second base layer is paved on the second reinforced paving layer and corresponds to the area of the body.

2. The B-pillar reinforcement plate according to claim 1, wherein the inner reinforcement plate and the outer reinforcement plate are bonded by structural adhesive, the structural adhesive is matched with the inner reinforcement plate in shape and is provided with openings corresponding to the lightening holes;

the outer reinforcing plate is connected with the inner reinforcing plate through a mechanical connecting piece penetrating through the outer reinforcing plate, the structural adhesive and the inner reinforcing plate.

3. The B-pillar reinforcement panel of claim 1, wherein the first base ply, the first reinforced ply, the second reinforced ply, and the second base ply each comprise a multi-layer layup;

the number of paving layers of the first reinforced paving layer or the second reinforced paving layer is more than or equal to that of the first basic paving layer or the second basic paving layer.

4. The B-pillar reinforcement of claim 1, wherein a first hinge reinforcement plate is welded to a middle region of the outer reinforcement plate and a second hinge reinforcement plate is welded to a lower region of the outer reinforcement plate;

the first hinge reinforcing plate and the second hinge reinforcing plate are close to the bearing area, and the lightening holes are located above the first hinge reinforcing plate.

5. The B-pillar reinforcement of claim 1, wherein the outer reinforcement is made of a metal material and is formed by press forming;

the inner-layer reinforcing plate is made of a carbon-glass fiber composite material, wherein the ratio of carbon fibers to glass fibers is 5: 1-1: 5, and the carbon-glass fiber composite material is formed by weaving and mixing through a weaving process.

6. The B-pillar stiffener of claim 1, wherein either end of the inner stiffener is flush with or shorter than either end of the outer stiffener, the ends of the outer stiffener further including extension regions extending perpendicular to the first direction, the ends of the B-pillar stiffener being connected to an A-pillar rocker stiffener and a side sill beam of a vehicle;

the cross section of the body of the outer reinforcing plate is U-shaped and provided with a flange, and the inner reinforcing plate is paved and attached to the inner wall of the U-shaped area of the body.

7. A manufacturing method of a B-pillar reinforcing plate is characterized by comprising the following steps:

forming an outer-layer reinforcing plate, wherein the outer-layer reinforcing plate is provided with a body extending along a first direction, the body is provided with lightening holes extending along the first direction, and the lightening holes avoid a bearing area of the B-column reinforcing plate;

paving fiber materials on the inner wall of the outer layer reinforcing plate, wherein the fiber materials comprise:

paving a first basic paving layer on the inner wall of the outer layer reinforcing plate corresponding to the area of the body;

paving a first reinforced paving layer on the first foundation paving layer corresponding to the area where the lightening hole is located;

paving a second reinforced paving layer on the first reinforced paving layer corresponding to the lightening holes and the area where the bearing area is located;

paving a second basic layer on the second reinforced layer corresponding to the area of the body; and

and solidifying and forming the fiber material by a Resin Transfer Molding (RTM) process or a high-pressure resin transfer molding (HP-RTM) process to form the inner-layer reinforcing plate.

8. The method of manufacturing of claim 7, further comprising:

before the fiber materials are paved, forming structural adhesive which is matched with the inner-layer reinforcing plate in shape and is provided with openings corresponding to the lightening holes on the inner wall of the outer-layer reinforcing plate, paving the first foundation paving layer on the structural adhesive, and adhering the inner-layer reinforcing plate to the outer-layer reinforcing plate through the structural adhesive;

after the fiber material is paved, the outer reinforcing plate and the inner reinforcing plate are connected through a mechanical connecting piece penetrating through the outer reinforcing plate, the structural adhesive and the inner reinforcing plate.

9. The method of making of claim 7, wherein the first base ply, the first reinforced ply, the second reinforced ply, and the second base ply are each formed from a multi-ply layup;

when the first basic layer, the second basic layer and the second reinforced layer are paved, the paving angles of all the paving layers are sequentially 0 degrees and 90 degrees alternately;

and when the first reinforced paving layer is paved, paving angles of all paving layers are sequentially alternated at 45 degrees and 45 degrees below zero.

10. The method of manufacturing of claim 7, further comprising:

before the fiber material is paved, a first hinge reinforcing plate is welded in the middle area of the outer layer reinforcing plate, a second hinge reinforcing plate is welded in the lower area of the outer layer reinforcing plate, the first hinge reinforcing plate and the second hinge reinforcing plate are close to the bearing area, and the lightening holes are located above the first hinge reinforcing plate.

11. The manufacturing method of claim 7, wherein the outer-layer reinforcing plate is formed by punching a metal material, the inner-layer reinforcing plate is formed by weaving a carbon-glass fiber composite material through a weaving process, and the ratio of carbon fiber to glass fiber in the carbon-glass fiber composite material is 5: 1-1: 5.

12. A B-pillar assembly, comprising:

the B-pillar reinforcement panel of any one of claims 1-6; and

the B-column inner plate is arranged on the inner wall of the B-column reinforcing plate and is connected with the B-column reinforcing plate through a first hinge reinforcing plate and a second hinge reinforcing plate which are welded on the body of the outer-layer reinforcing plate.