CN116374011A - Door ring structure and design method thereof - Google Patents

Abstract

The application relates to the technical field of vehicle manufacturing and discloses a door ring structure and a design method of the door ring structure, wherein the door ring structure comprises a plurality of door ring pieces, at least part of the door ring pieces are provided with door ring fillets, and the door ring pieces are sequentially connected in a butt joint mode to form the door ring structure with at least one annular door ring; wherein the butt joint seam between two adjacent door ring pieces is located outside the area where the door ring fillet on the door ring piece is located. By the aid of the technical scheme, strength of the door ring structure can be improved, and weight of the door ring structure is reduced. The door ring structure is applied to a vehicle body of a vehicle.

Description

Door ring structure and design method thereof

Technical Field

The application relates to the technical field of vehicle manufacturing, in particular to a door ring structure and a design method of the door ring structure.

Background

With the continuous development of vehicle manufacturing and production technologies, the fuel economy of fuel vehicles and the range expectations of new energy vehicles are also continuously improved. The lightweight design of the vehicle body is one of important ways for improving the fuel economy of the fuel vehicle and the endurance mileage of the new energy vehicle.

The light weight design of the vehicle body is contradictory with the strength and the rigidity of the vehicle body, and materials with higher strength and smaller density are adopted in the related art to manufacture parts of the vehicle body so as to reduce the weight of the vehicle body, but the materials are often more expensive, and the production cost of the vehicle is increased. Therefore, the related art cannot achieve both the vehicle body strength and the vehicle body weight without increasing the manufacturing cost.

Disclosure of Invention

In order to solve the above problems, the present application provides a door ring structure and a design method of the door ring structure, which can improve the strength of the door ring structure and reduce the weight of the door ring structure.

In one aspect, the present application provides a door ring structure, including a plurality of door ring members, at least some of the door ring members having door ring rounded corners thereon, the plurality of door ring members being sequentially butt-connected to form a door ring structure having at least one annular door ring; wherein the butt joint seam between two adjacent door ring pieces is located outside the area where the door ring fillet on the door ring piece is located.

According to the door ring structure, the door ring structure is formed by connecting the plurality of door ring pieces, so that the utilization rate of the plate can be improved, and the waste of the plate is reduced; and the adjacent two door ring pieces are in butt joint connection, so that the plate overlapping of the connecting positions of the door ring pieces can be eliminated, and compared with the overlapping connection of the connecting parts of the adjacent two door ring pieces in the related art, the door ring structure can reduce the area of the door ring pieces, thereby reducing the weight of the door ring pieces, further reducing the weight of the door ring structure and being beneficial to the lightweight design of vehicles; meanwhile, the butt joint seam between two adjacent door ring pieces is arranged outside the area where the door ring round angle on the door ring piece is located, so that the situation that stress concentration is formed in the door ring round angle area when the door ring piece is stamped and the butt joint seam is damaged can be avoided, the strength of the door ring structure can be improved, and the overall quality of a vehicle is improved. Therefore, the strength of the vehicle body can be improved and the weight of the vehicle body can be reduced without using a material with high strength and low density, i.e., the strength and the weight of the vehicle body can be both achieved without increasing the manufacturing cost.

In one possible implementation of the present application, the plurality of door ring members includes an a-pillar reinforcement, a roof rail rear section, a B-pillar reinforcement, and a sill reinforcement that are butt-connected in sequence; wherein, the one end that is close to A post reinforcement on the roof side rail reinforcement has first door ring fillet, and the one side that is close to roof side rail reinforcement and B post reinforcement of roof side rail rear end has the second door ring fillet, and the one side that is close to B post reinforcement and A post reinforcement on the threshold reinforcement has the third door ring fillet, and the one end that is close to the threshold reinforcement on the A post reinforcement has the fourth door ring fillet.

In one possible implementation manner of the present application, a side, away from the roof side rail reinforcement, of the roof side rail rear section has a first extension, and a fifth door ring fillet is provided between the first extension and the side, away from the roof side rail reinforcement, of the roof side rail rear section; the side, far away from the A column reinforcement, of the threshold reinforcement is provided with a second extension part, and a sixth door ring fillet is arranged between the second extension part and the side, far away from the A column reinforcement, of the threshold reinforcement; the door ring structure also comprises a C column component, one end of the C column component is in butt joint with the first extension part, and the other end of the C column component is in butt joint with the second extension part.

In one possible implementation of the present application, the C-pillar assembly includes a C-pillar connector and a C-pillar stiffener; one end of the C column connecting piece is in butt joint with the first extension part, and the other end of the C column connecting piece is in butt joint with one end of the C column reinforcing piece; the other end of the C column reinforcement is in butt joint with the second extension part.

In one possible implementation of the present application, an end of the C-pillar connecting piece near the first extension has a seventh door ring rounded corner, and an end of the C-pillar connecting piece near the C-pillar reinforcing piece has a ninth door ring rounded corner; the C column reinforcement is provided with an eighth door ring fillet at one end close to the second extension part.

In yet another aspect, the present application also provides a method of designing a door ring structure having at least two door ring rounded corners, the method comprising: determining stress states of different areas based on impact forces born by the different areas of the door ring structure and expected deformation modes of the different areas; based on stress states of different areas and setting positions of door ring fillets in different areas, carrying out structural division on the door ring structure to obtain the structural shape of each door ring in the plurality of structural members; and two adjacent door ring members are butt-jointed.

According to the design method of the door ring structure, due to the different stress states of different areas in the door ring structure and the structural form of the door ring structure, the door ring structure can be structurally divided according to the structural strength required by different areas in the door ring structure, so that the door ring round angle is positioned on a proper door ring piece, the strength of the door ring piece is improved, and the butt joint joints between two adjacent door ring pieces are arranged outside the area where the door ring round angle is positioned when the door ring structure is structurally divided according to the position of the door ring round angle, and therefore the strength of the door ring structure can be further improved, and the integral strength of a vehicle is further improved. Simultaneously, the door ring piece forming the door ring structure is fixed into a whole in a butt joint mode, so that the material consumption of the door ring structure can be reduced, the weight of the door ring structure can be reduced, and the lightweight design of a vehicle is facilitated.

In one possible implementation of the present application, the door ring structure includes a butt-connected a-pillar reinforcement and roof rail reinforcement; based on the stress state of different regions and the setting position of the door ring fillet in different regions, carry out structural division to the door ring structure, include: based on the area where the A column reinforcement and the roof side rail reinforcement are located receives the frontal collision and the offset collision, the first door ring fillet is arranged on the roof side rail reinforcement, and the butt joint seam of the A column reinforcement and the roof side rail reinforcement is arranged outside the area where the first door ring fillet is located.

In one possible implementation of the present application, the door ring structure further includes a roof rail rear section butt-connected with the roof rail reinforcement and a B-pillar reinforcement butt-connected with the roof rail rear section; based on the stress state of different regions and the setting position of the door ring fillet in different regions, carry out structural division to the door ring structure, include: based on the roof side beam reinforcement bear the roof pressure with the region at roof side beam rear end place, and the roof side beam rear end place with the region at B post reinforcement bear the roof pressure, set up the second door ring fillet on the roof side beam rear end to set up the butt joint seam of roof side beam reinforcement and roof side beam rear end outside the region at second door ring fillet place, set up the butt joint seam of B post reinforcement and roof side beam rear end outside the region at second door ring fillet place.

In one possible implementation of the present application, the door ring structure further includes a threshold reinforcement, one end of the threshold reinforcement is butt-connected with the B-pillar reinforcement, and the other end is butt-connected with the a-pillar reinforcement; based on the stress state of different regions and the setting position of the door ring fillet in different regions, carry out structural division to the door ring structure, include: based on the side collision bearing of the area where the B-pillar reinforcement and the threshold reinforcement are located, arranging a third door ring fillet on the threshold reinforcement, and arranging a butt joint seam of the B-pillar reinforcement and the threshold reinforcement outside the area where the third door ring fillet is located; based on the area where the A column reinforcement and the threshold reinforcement are located receives side collision, the fourth door ring fillet is arranged on the A column reinforcement, and the butt joint seam of the A column reinforcement and the threshold reinforcement is arranged outside the area where the fourth door ring fillet is located.

In one possible implementation of the present application, the door ring structure further includes a C-pillar assembly; the side, far away from the upper side beam reinforcement, of the upper side beam rear section is provided with a first extension part, and the side, far away from the A column reinforcement, of the threshold reinforcement is provided with a second extension part; one end of the C column component is in butt joint with the first extension part, and the other end of the C column component is in butt joint with the second extension part; based on the stress state of different regions and the setting position of the door ring fillet in different regions, carry out structural division to the door ring structure, include: based on the fact that the area where the rear section of the upper side beam and the C column assembly are located bears the jacking pressure, a seventh door ring fillet is arranged on the C column assembly, and a butt joint seam of the rear section of the upper side beam and the C column assembly is arranged outside the area where the seventh door ring fillet is located; based on the area where the threshold reinforcement and the C column assembly are located receives side collision, the eighth door ring fillet is arranged on the C column assembly, and the butt joint seam of the threshold reinforcement and the C column assembly is arranged outside the area where the eighth door ring fillet is located.

Drawings

FIG. 1 is a schematic view of a door ring structure provided herein;

FIG. 2 is an exploded view of the door ring structure provided herein;

FIG. 3 is a schematic view of the seam location of the door ring structure provided in the present application;

fig. 4 is a schematic view of stress states of different areas of the door ring structure provided in the present application;

FIG. 5 is a flow chart of a method of designing a door ring structure provided by the present application;

FIG. 6 is a flow chart of a method of designing a door ring structure provided by the present application;

FIG. 7 is a flow chart of a method of designing a door ring structure provided by the present application;

FIG. 8 is a flow chart of a method of designing a door ring structure provided by the present application;

fig. 9 is a flowchart of a design method of a door ring structure provided in the present application.

Reference numerals:

1-a column reinforcement; 11-fourth door ring fillets; 2-roof side rail reinforcements; 21-a first door ring fillet; 3-the rear section of the upper side beam; 31-second door ring rounded corners; 32-fifth door ring fillets; 33-a first extension; 4-B column reinforcement; 5-rocker reinforcement; 51-third door ring fillet; 52-fourth door ring fillet; 53-a second extension; a 6-C column connector; 61-seventh door ring fillet; 62-ninth door ring fillet; 7-C column reinforcements; 71-eighth door ring fillet; d-front collision offset collision area; e-column collision area; f-pressing area; g-side impact area; w1-a first joint; w2-a second joint; w3-a third joint; w4-fourth joint; w5-fifth joint; w6-sixth joint; w7-seventh joint; w8-eighth joint.

Detailed Description

For the purposes, technical solutions and advantages of the embodiments of the present application to be more apparent, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.

Referring to fig. 1 and 2, fig. 1 is a schematic view of a door ring structure provided in the present application, and fig. 2 is an exploded view of the door ring structure provided in the present application. The door ring structure comprises a plurality of door ring pieces, wherein at least part of the door ring pieces are provided with door ring fillets, and the door ring pieces are sequentially connected in a butt joint way to form an annular first door ring; wherein the butt joint seam between two adjacent door ring pieces is located outside the area where the door ring fillet on the door ring piece is located.

The blanking piece corresponding to each door ring piece can be obtained from the plate in a blanking, cutting and cutting mode according to the structural form of each door ring piece, and when the structural shape of each door ring piece is designed, the positions of the butt joint joints of two adjacent door ring pieces are required to be arranged outside the area where the door ring round corners on the door ring pieces are located, namely the butt joint joints of the two door ring pieces are located outside the circular arcs corresponding to the round corner radii of the door ring round corners; then according to the structural form of the door ring structure, the connecting ends of the blanking pieces of two adjacent door ring pieces are butted; then, adopting laser splice welding, flash butt welding and other modes to splice-weld two adjacent blanking pieces into a whole, thereby forming a door ring plate; finally, the door ring plate material which is spliced and welded into a whole is heated, and the door ring plate material is subjected to integral stamping forming in a thermal forming die, so that the required door ring structure is obtained.

In another example, according to the structural shape of the door ring structure, an integral door ring plate may be obtained by punching or cutting from the same plate, and then the integral door ring plate may be integrally formed by punching in a thermoforming mold, so that the required door ring structure may be obtained.

In the embodiment of the application, the door ring structure is formed by connecting the plurality of door ring pieces, so that the utilization rate of the plate can be improved, and the waste of the plate can be reduced; and the adjacent two door ring pieces are in butt joint connection, so that the plate overlapping of the connecting positions of the door ring pieces can be eliminated, and compared with the situation that the connecting parts of the adjacent two door ring pieces are in overlapping connection in the related art, the door ring structure can reduce the area of the door ring pieces, thereby reducing the weight of the door ring pieces, further reducing the weight of the door ring structure and being beneficial to the lightweight design of vehicles; meanwhile, the butt joint seam between two adjacent door ring pieces is arranged outside the area where the door ring round angle on the door ring piece is located, so that the situation that stress concentration is formed in the door ring round angle area when the door ring piece is stamped and the butt joint seam is damaged can be avoided, the strength of the door ring structure can be improved, and the overall quality of a vehicle is improved. Therefore, the present application can improve the strength of the vehicle body and reduce the weight of the vehicle body without using a material with high strength and low density, i.e., can combine the strength of the vehicle body and the weight of the vehicle body without increasing the manufacturing cost

In some possible embodiments, as shown in fig. 1 and 2, the door ring structure may be provided in a structural form including the a-pillar reinforcement 1, the roof side rail reinforcement 2, the roof side rail rear section 3, the B-pillar reinforcement 4, and the rocker reinforcement 5, which are butt-joined in this order. The A column reinforcement 1 is in butt joint with the upper edge beam reinforcement 2, the upper edge beam reinforcement 2 is in butt joint with the upper edge beam rear section 3, the upper edge beam rear section 3 is in butt joint with the B column reinforcement 4, the B column reinforcement 4 is in butt joint with the threshold reinforcement 5, and the threshold reinforcement 5 is in butt joint with the A column reinforcement 1 to form a door ring structure with a first door ring; and, on the roof side rail reinforcement 2, the one end that is close to A post reinforcement 1 has first door ring fillet 21, and the one side that is close to roof side rail reinforcement and B post reinforcement 4 of roof side rail back end 3 has second door ring fillet 31, and on the threshold reinforcement 5, the one side that is close to B post reinforcement 4 and A post reinforcement 1 has third door ring fillet 51, and the one end that is close to threshold reinforcement 5 on the A post reinforcement 1 has fourth door ring fillet 11.

Referring to fig. 3, fig. 3 is a schematic view of a seam position of a door ring structure provided in the present application. As shown in fig. 1, 2 and 3, the first joint W1 between the a-pillar reinforcement 1 and the roof side rail reinforcement 2 may be disposed outside the region where the first door ring bead 21 is located; disposing a second seam W2 between the roof side rail reinforcement 2 and the roof side rail rear section 3 outside the second door ring fillet 31; disposing an eighth seam W8 between the roof side rail rear section 3 and the B-pillar reinforcement 4 outside the second door ring fillet 31; disposing a seventh joint W7 between the B-pillar reinforcement 4 and the rocker reinforcement 5 outside the third door ring bead 51; a sixth joint W6 is provided between the rocker reinforcement 5 and the a-pillar reinforcement 1, the sixth joint W6 being provided at a desired position between the a-pillar reinforcement 1 and the rocker reinforcement 5 outside the third door ring rounded corner 51 and outside the fourth door ring rounded corner 11. For example, as shown in fig. 3, the sixth joint W6 may be provided near the rocker reinforcement 5, or the sixth joint W6 may be provided near the a-pillar reinforcement 1, or the rocker reinforcement 5 and the a-pillar reinforcement 1 may be provided at an intermediate position of the sixth joint W6.

Referring to fig. 4, fig. 4 is a schematic view of stress states of different areas of the door ring structure provided in the present application. As shown in fig. 4, in the door ring structure, when a collision occurs, the first door ring fillet 21 is disposed on the upper edge beam reinforcement 2, that is, the side, close to the a-pillar reinforcement 1, of the first door ring fillet 21 disposed at the first joint W1 can keep the upper edge beam reinforcement 2 as a complete section in the front windshield section, so that the structural shape of the upper edge beam reinforcement 2 is smooth and uniform as a whole, and no local structural strength mutation occurs, thereby effectively solving the problem that the upper edge beam reinforcement 2 bends when a small offset collision occurs. At the same time, the roof side rail reinforcement 2 located in the pillar impact region E can also be subjected to a larger pillar impact force to improve the vehicle body strength.

In other possible embodiments, as shown in fig. 1, 2 and 3, the roof rail rear section 3 may be provided in the form of a structure having a first extension 33 on the side of the roof rail rear section 3 remote from the roof rail reinforcement 2, and a fifth door ring rounded corner 32 may be provided between the first extension 33 and the side of the roof rail rear section 3 remote from the roof rail reinforcement 2. It is also possible to provide the rocker reinforcement 5 with a second extension 53 on the side of the rocker reinforcement 5 remote from the a-pillar reinforcement 1 and to provide a sixth door ring fillet 52 between the second extension 53 and the side of the rocker reinforcement 5 remote from the a-pillar reinforcement 1. In this way, a C-pillar assembly may be provided in the door ring structure, one end of the C-pillar assembly being butt-connected with the first extension 33 and the other end being butt-connected with the second extension 53, so that a second door ring may be formed in the door ring structure.

As shown in fig. 1 and 2, for example, the C-pillar assembly may be provided in a structure including the C-pillar connecting member 6 and the C-pillar reinforcement 7. Wherein, one end of the C column connecting piece 6 is in butt joint with the first extension part 33, and the other end is in butt joint with one end of the C column reinforcing piece 7; the other end of the C-pillar reinforcement 7 is butt-connected with the second extension 53.

As another example, a seventh door ring fillet 61 may be provided on the C-pillar connecting piece 6 at an end near the first extension 33, a ninth door ring fillet 62 may be provided on the C-pillar connecting piece 6 at an end near the C-pillar reinforcement 7, and an eighth door ring fillet 71 may be provided on the C-pillar reinforcement 7 at an end near the second extension 53.

As yet another example, as shown in fig. 1, 2 and 3, the third seam W3 between the first extension 33 of the rocker rear section 3 and the C-pillar attachment 6 may be disposed outside the area where the seventh door ring fillet 61 is located; disposing a fourth seam W4 between the C-pillar connecting piece 6 and the C-pillar reinforcement 7 outside the area where the ninth door ring fillet 62 is located; a fifth joint W5 between the C-pillar reinforcement 7 and the rocker reinforcement 5 is provided outside the area where the eighth door ring bead 71 is located. Thus, on the basis of the first door ring, by providing the C-pillar assembly on the side of the roof side rail rear section 3 and the rocker reinforcement 5 away from the a-pillar reinforcement 1, a second door ring formed by butt-joining the roof side rail rear section 3, the C-pillar connector 6, the C-pillar reinforcement 7, the rocker reinforcement 5 and the B-pillar reinforcement in this order can be obtained, thereby obtaining a door ring structure having the first door ring and the second door ring.

As yet another example, in order to increase the strength of the area where the B-pillar reinforcement 4 is located in the door ring structure, the B-pillar reinforcement 4 may be provided in a structure in which the thickness thereof is greater than the thickness of the rocker rear section 3 and greater than the thickness of the rocker reinforcement.

As shown in fig. 4, in the door ring structure, in the event of a collision, the roof side rail rear section 3 and the roof side rail reinforcement 2 in the door ring structure are located in the pressing area F mainly receiving the pressure from the top of the vehicle, in the above embodiment, the second door ring rounded corner 31 and the fifth door ring rounded corner 32 are both disposed on the roof side rail rear section 3, that is, the second seam W2, the third seam W3 and the eighth seam W8 are disposed outside the areas where the second door ring rounded corner 31 and the fifth door ring rounded corner 32 are located, so that the roof side rail rear section 3 has a complete integral structure, so that the strength of each part of the roof side rail rear section 3 in the pressing area F mainly corresponding to the pressing is consistent, and the roof side rail rear section 3 can bear a larger pressing pressure without generating a larger deformation, so that the overall strength of the vehicle body can be improved, and the collapse deformation of the vehicle body is avoided when the vehicle body is corresponding to the pressing.

Meanwhile, the eighth joint W8 is arranged between the upper side beam rear section 3 and the B-pillar reinforcement 4, and the seventh joint W7 is arranged between the threshold reinforcement 5 and the B-pillar reinforcement 4, so that the B-pillar reinforcement 4 can be conveniently arranged in a structural form with higher strength and rigidity, for example, the thickness of the B-pillar reinforcement 4 is increased, so that the area where the B-pillar reinforcement 4 is located has higher structural strength, and the intrusion amount of the area where the B-pillar reinforcement 4 is located can be better controlled when the vehicle is in side collision, and passengers in the vehicle can be prevented from being extruded.

The sixth joint W6 is disposed between the a-pillar reinforcement 1 and the threshold reinforcement 5, and the fifth joint 5 is disposed between the threshold reinforcement 5 and the C-pillar reinforcement 7, so that the strength of the side impact region G where the threshold reinforcement 5 is located is lower than that of the side impact region G where the B-pillar reinforcement 4 is located, and the side impact region G where the threshold reinforcement 5 is located becomes a soft region, so that when a side impact occurs in a vehicle, the threshold reinforcement 5 can collapse to absorb part of energy when the side impact occurs, and the safety of drivers and passengers can be improved.

The third joint is arranged between the C column connecting piece 6 and the upper edge beam rear section 3, the fifth joint W5 is arranged between the C column reinforcing piece 7 and the threshold reinforcing piece 5, so that the strength of the area where the C column component is located is lower, namely the strength of the rear door area of the vehicle is lower than that of the front area, and therefore when the front collision offset collision area D of the vehicle is in a positive collision or a small offset collision, the collision force can be transmitted to the second door ring through the first door ring, namely the collision force is transmitted to the area where the C column component is located, the C column component is deformed to a certain extent, the area where the first door ring is located is not deformed, or the deformation amount is smaller, and better protection can be provided for drivers and passengers.

The fourth joint W4 is arranged between the C-pillar connecting piece 6 and the C-pillar reinforcing piece 7, so that the C-pillar connecting piece 6 and the C-pillar reinforcing piece 7 can be divided into two structural members, the utilization rate of the plate can be improved, and waste materials formed after blanking or cutting are reduced.

The embodiment of the application also provides a design method of the door ring structure, the door ring structure is provided with at least two door ring fillets, and referring to fig. 5, fig. 5 is a flow chart of the design method of the door ring structure. The steps shown in fig. 5 will be described.

S101, determining stress states of different areas based on impact forces born by the different areas of the door ring structure and expected deformation modes of the different areas.

In some possible embodiments, in designing the vehicle body structure, it is necessary to consider possible deformation of the vehicle body structure in the event of a collision, and in order to protect the safety of the driver, it is undesirable that some regions of the vehicle body undergo large fracture deformation in the event of a collision, which requires different regions of the vehicle body to have different strengths. The strength required for different areas of the vehicle body can be determined according to the stress state of the areas of the vehicle body structure when the areas collide, namely the situation of main impact force received by the areas.

Illustratively, as shown in fig. 4, in the event of a frontal collision or a small offset collision of the vehicle, the door ring structure in the vehicle body is a stress region, and the impact force is transmitted from the front end of the door ring structure to the rear section of the door ring structure. When a vehicle collides with a column, the areas between the upper side beam reinforcement 2, the threshold reinforcement 5 and the A column reinforcement 1 in the door ring structure are main stress areas, namely structural members between the upper side beam reinforcement 2, the threshold reinforcement 5 and the A column reinforcement 1 are mainly subjected to the impact force of the column collision. When a side collision occurs on the vehicle, the area where the threshold reinforcement 5 is located is a main stress area, that is, the threshold reinforcement 5 is mainly subjected to the impact force of the side collision. When the vehicle is subjected to top pressure, the area where the upper edge beam rear section 3 in the door ring structure is located is a main stress area, namely, the upper edge beam rear section 3 is mainly subjected to the top pressure.

In some possible embodiments, although the magnitude of the main impact force and the direction of the impact force born by different areas of the door ring structure are different when the vehicle collides, the different areas of the door ring structure can be determined whether the different areas of the door ring structure should deform or in what form to deform when the vehicle collides according to the protection mode of the driver to determine the stress state of the different areas of the door ring structure.

For example, as shown in fig. 4, in order to protect the safety of the driver, when the vehicle collides with the pillar, the roof side rail reinforcement 2, the pillar-contacting area E of the a-pillar reinforcement 1 near the rocker reinforcement 5 is desirably deformed in such a manner that the structural members in the pillar-contacting area E are not deformed or are deformed only slightly, so that the driver who presses the roof side rail reinforcement 2 and the a-pillar reinforcement 1 after deformation can be avoided, thereby providing a safety area for the driver. While in the event of a side impact of the vehicle, the desired deformation of the region in which the B-pillar reinforcement 4 is located is such that the B-pillar reinforcement 4 does not deform or only deforms slightly, but the rocker reinforcement 5 may collapse to absorb some of the energy in the event of an impact. Therefore, the actual deformation state of the different areas, namely the deformation mode of the different areas after being stressed, required in the collision can be determined by combining the main impact force born by the different areas of the door ring structure and the expected deformation mode of the different areas.

S102, carrying out structural division on a door ring structure based on stress states of different areas and arrangement positions of door ring fillets in different areas to obtain the structural shape of each door ring in a plurality of structural members; and two adjacent door ring members are butt-jointed.

In some possible embodiments, the structural form of the door ring structure is already established when designing the structural members in the door ring structure of the vehicle, i.e. the overall shape of the door ring structure is already established as the body shape is established. When the structural member in the door ring structure is specifically designed, the door ring structure is subjected to structural division by combining the conditions of main impact forces suffered by different areas in the door ring structure under the constraint condition of the integral modeling of the door ring structure so as to determine the positions of butt joints of the structural members forming the door ring structure. After the butt joint positions of the structural members in the door ring structure are determined, the structural division of the door ring structure is completed, and the structural shape of each door ring member in the plurality of structural members constituting the door ring structure is determined accordingly. According to the determined structure formation of each door ring, blanking pieces of each door ring are moved from the plate in a blanking, cutting and cutting mode, and then the blanking pieces corresponding to two adjacent door ring are connected in a butt joint mode, so that an integrated door ring structure to be punched is formed.

In other possible embodiments, a plurality of door ring fillets are provided in the door ring structure, for example, four door ring fillets are provided in the first door ring and five door ring fillets are provided in the second door ring, each of the door ring fillets being provided at a location determined by the overall shape of the vehicle body, as shown in fig. 1. When structural members in the door ring structure are divided, the position of a butt joint seam between two adjacent door ring members in butt joint connection needs to be determined according to the stress condition of the area where each door ring fillet is located. That is, depending on the position of each door ring bead, it is determined on which of the two adjacent door ring members the door ring bead is to be disposed, and this is determined depending on the impact force and the desired deformation manner to which the two adjacent door ring members are subjected in the event of a collision of the vehicle. After determining that a door ring fillet needs to be provided on one of the two adjacent door ring pieces, a butt joint seam between the two adjacent butt-joined door ring pieces is provided outside an area where the door ring fillet is located. And butting two adjacent door ring pieces according to the corresponding positions of the obtained door ring pieces.

In this embodiment of the application, because according to the different stress states of different regions in the door ring structure, and the structural style of door ring structure, carry out structural division to the door ring structure, can carry out structural division to the door ring fillet in the door ring structure according to the required structural strength in different regions in the door ring structure, so that the door ring fillet is located suitable door ring spare, in order to improve the intensity of this door ring spare, and can be according to the position of door ring fillet, the butt joint seam between two adjacent door ring spare sets up outside the region at door ring fillet place, thereby can further improve the intensity of door ring structure, and then promote the bulk strength of vehicle. Simultaneously, the door ring piece forming the door ring structure is fixed into a whole in a butt joint mode, so that the material consumption of the door ring structure can be reduced, the weight of the door ring structure can be reduced, and the lightweight design of a vehicle is facilitated.

Referring to fig. 6, fig. 6 is a flowchart of a method for designing a door ring structure provided in the present application. The door ring structure includes a butt-connected a-pillar reinforcement and roof rail reinforcement, as shown in fig. 6, based on fig. 5, S102 in fig. 5 can be implemented at least through S201. The steps shown in fig. 6 will be described.

S201, bearing frontal collision and offset collision based on the area where the A-pillar reinforcement and the upper edge beam reinforcement are located, arranging the first door ring fillet on the upper edge beam reinforcement, and arranging a butt joint seam of the A-pillar reinforcement and the upper edge beam reinforcement outside the area where the first door ring fillet is located.

In some possible embodiments, when the vehicle collides with the front end of the vehicle and the door ring structure is mainly in front of the vehicle and in offset, the area between the a-pillar reinforcement and the roof side rail reinforcement is mainly in front of the front and offset collision, in order to avoid the roof side rail reinforcement from being greatly deformed in bending during the collision, the first door ring fillet is disposed on the roof side rail reinforcement near one end of the a-pillar reinforcement, and the first seam between the a-pillar reinforcement and the roof side rail reinforcement is disposed outside the area where the first door ring fillet is disposed. Therefore, the upper edge beam reinforcement can be kept as a complete section in the front windshield section, the structural shape of the upper edge beam reinforcement is integrally smooth and uniform, and the strength mutation of a local structure is avoided, so that the problem that the upper edge beam reinforcement bends during small offset collision can be effectively solved; meanwhile, the upper side beam reinforcement 2 positioned in the column collision area E can bear larger column collision force so as to improve the strength of the vehicle body; and the first joint is arranged outside the area where the first door ring fillet is located, so that the problem that the connection strength of the first joint is affected due to the existence of the fillet when the butt-connected plates are punched can be avoided.

Referring to fig. 7, fig. 7 is a flowchart of a method for designing a door ring structure provided in the present application. The door ring structure further comprises: the roof side rail rear section butt-joined to the roof side rail reinforcement and the B-pillar reinforcement butt-joined to the roof side rail rear section are as shown in fig. 7, and based on fig. 5, S102 in fig. 5 can be realized at least by S301. The steps shown in fig. 7 will be described.

S301, based on the fact that the area where the upper edge beam reinforcement and the upper edge beam rear section are located bears the jacking pressure and the area where the upper edge beam rear section and the B-pillar reinforcement are located bears the jacking pressure, the second door ring fillet is arranged on the upper edge beam rear section, the butt joint seam of the upper edge beam reinforcement and the upper edge beam rear section is arranged outside the area where the second door ring fillet is located, and the butt joint seam of the B-pillar reinforcement and the upper edge beam rear section is arranged outside the area where the second door ring fillet is located.

In some possible embodiments, when the roof of the vehicle is impacted, the part of the door ring structure near the roof of the vehicle mainly bears the impact force of the jacking, and then the areas of the upper edge beam reinforcement, the upper edge beam rear section and the B-pillar reinforcement mainly bear the impact force of the jacking, in order to avoid the upper edge beam rear section from generating larger bending deformation when the upper edge beam rear section is impacted by the jacking, a second door ring fillet is arranged on the upper edge beam rear section, a second seam between the upper edge beam reinforcement and the upper edge beam rear section is arranged outside the area of the second door ring fillet, and an eighth seam between the B-pillar reinforcement and the upper edge beam rear section is arranged outside the area of the second door ring fillet. Therefore, the rear section of the roof side rail has a complete integral structure, so that the strength of each part of the rear section of the roof side rail, which is mainly used for jacking, in the jacking area is consistent, the rear section of the roof side rail can bear larger jacking pressure without larger deformation, the integral strength of the vehicle body can be improved, and the collapse deformation of the vehicle body is avoided when the vehicle body is used for jacking.

Referring to fig. 8, fig. 8 is a flowchart of a method for designing a door ring structure provided in the present application. The door ring structure further includes a threshold reinforcement, one end of the threshold reinforcement is butt-connected with the B-pillar reinforcement, and the other end of the threshold reinforcement is butt-connected with the a-pillar reinforcement, as shown in fig. 8, based on fig. 5, S102 in fig. 5 may be implemented at least through S401 to S402. The steps shown in fig. 8 will be described.

S401, bearing side collision based on the area where the B-pillar reinforcement and the threshold reinforcement are located, arranging a third door ring fillet on the threshold reinforcement, and arranging a butt joint seam of the B-pillar reinforcement and the threshold reinforcement outside the area where the third door ring fillet is located.

S402, bearing side collision based on the area where the A column reinforcement and the threshold reinforcement are located, arranging the fourth door ring fillet on the A column reinforcement, and arranging a butt joint seam of the A column reinforcement and the threshold reinforcement outside the area where the fourth door ring fillet is located.

In some possible embodiments, when the vehicle collides with the side impact, the area of the door ring structure near the middle of the vehicle mainly receives the side impact, and then the area of the door sill reinforcement mainly receives the impact force of the side impact. In order to avoid bending deformation of the B-pillar reinforcement in a side collision, a third door ring fillet is arranged on the threshold reinforcement, a seventh joint between the B-pillar reinforcement and the threshold reinforcement is arranged outside an area where the third door ring fillet is located, a fourth door ring fillet is arranged on the A-pillar reinforcement, and a sixth joint between the A-pillar reinforcement and the threshold reinforcement is arranged outside an area where the fourth door ring fillet is located. Thus, the B-pillar reinforcement is conveniently arranged to be thicker than the rear section of the roof side rail and thicker than the threshold reinforcement, so that the strength of the B-pillar reinforcement is improved, and the invasion amount of the area where the B-pillar reinforcement is located can be better controlled when the vehicle bumps sideways, so that passengers in the vehicle can be prevented from being extruded. The butt joint seam is arranged on the threshold reinforcement, so that the strength of the side impact area where the threshold reinforcement is located is lower than that of the area where the B-pillar reinforcement is located, and the side impact area where the threshold reinforcement is located becomes a soft area, so that when the vehicle side impact occurs, the threshold reinforcement can collapse to absorb part of energy during the side impact, and the safety of drivers and passengers can be improved.

Referring to fig. 9, fig. 9 is a flowchart of a method for designing a door ring structure provided in the present application. The door ring structure also comprises a C column component; the side, far away from the upper side beam reinforcement, of the upper side beam rear section is provided with a first extension part, and the side, far away from the A column reinforcement, of the threshold reinforcement is provided with a second extension part; one end of the C-pillar assembly is butt-connected with the first extension portion, and the other end is butt-connected with the second extension portion, as shown in fig. 9, based on fig. 5, S102 in fig. 5 may be implemented at least through S501 to S502. The steps shown in fig. 9 will be described.

S501, bearing the jacking pressure based on the area where the rear section of the upper edge beam and the C column assembly are located, arranging a seventh door ring fillet on the C column assembly, and arranging a butt joint seam of the rear section of the upper edge beam and the C column assembly outside the area where the seventh door ring fillet is located.

S502, bearing side collision based on the area where the threshold reinforcement and the C column assembly are located, arranging an eighth door ring fillet on the C column assembly, and arranging a butt joint seam of the threshold reinforcement and the C column assembly outside the area where the eighth door ring fillet is located.

In some possible embodiments, when the roof of the vehicle is impacted, the area, close to the roof of the vehicle, of the door ring structure mainly bears the impact force of the jacking pressure, and then the area where the rear section of the roof rail and the C-pillar assembly are located mainly bears the impact force of the jacking pressure, in order to avoid the large bending deformation of the rear section of the roof rail and the C-pillar assembly when the roof is impacted by the jacking pressure, a seventh door ring fillet is arranged on the C-pillar assembly, and a third seam between the rear section of the roof rail and the C-pillar assembly is arranged outside the area where the seventh door ring fillet is located.

In other possible embodiments, when the vehicle collides with the side impact, the part of the door ring structure near the middle of the vehicle mainly bears the side impact, and then the area where the threshold reinforcement member is located mainly bears the impact force of the side impact. Therefore, the strength of the C column assembly can be improved, and the C column assembly is prevented from being greatly bent when bearing the jacking impact force and the side impact force, so that the threshold reinforcement is a structural member with lower strength in the door ring structure, and expected crumple deformation occurs when the side impact is carried out.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims (10)

1. A door ring structure, comprising:

the door ring members are sequentially connected in a butt joint mode to form a door ring structure with at least one annular door ring; wherein the butt joint seam between two adjacent door ring pieces is located outside the area where the door ring fillet on the door ring piece is located.

2. The door ring structure of claim 1, wherein the plurality of door ring members includes a-pillar reinforcement, a roof rail rear section, a B-pillar reinforcement, and a sill reinforcement that are butt-joined in order; the side of the upper side beam reinforcement, which is close to the A column reinforcement, is provided with a first door ring fillet, the rear section of the upper side beam is close to the upper side beam reinforcement and one side of the B column reinforcement is provided with a second door ring fillet, the side of the threshold reinforcement, which is close to the B column reinforcement and one side of the A column reinforcement, is provided with a third door ring fillet, and one end of the A column reinforcement, which is close to the threshold reinforcement, is provided with a fourth door ring fillet.

3. The door ring structure of claim 2, wherein a side of the upper edge beam rear section remote from the upper edge beam reinforcement has a first extension, and a fifth door ring fillet is provided between the first extension and the side of the upper edge beam rear section remote from the upper edge beam reinforcement; a second extension is arranged on one side of the threshold reinforcement, which is far away from the A column reinforcement, and a sixth door ring fillet is arranged between the second extension and one side of the threshold reinforcement, which is far away from the A column reinforcement;

the door ring structure further comprises a C-shaped column assembly, one end of the C-shaped column assembly is in butt joint with the first extension portion, and the other end of the C-shaped column assembly is in butt joint with the second extension portion.

4. A door ring structure according to claim 3, wherein the C-pillar assembly comprises a C-pillar connector and a C-pillar reinforcement; one end of the C column connecting piece is in butt joint with the first extension part, and the other end of the C column connecting piece is in butt joint with one end of the C column reinforcing piece; the other end of the C column reinforcement is in butt joint with the second extension part.

5. The door ring structure of claim 4, wherein an end of the C-pillar connector adjacent to the first extension has a seventh door ring fillet, and an end of the C-pillar connector adjacent to the C-pillar reinforcement has a ninth door ring fillet; an eighth door ring fillet is arranged at one end, close to the second extension part, of the C column reinforcement.

6. A method of designing a door ring structure, the door ring structure having at least two door ring rounded corners, the method comprising:

determining stress states of different areas of the door ring structure based on impact forces born by the different areas and expected deformation modes of the different areas;

based on the stress states of the different areas and the setting positions of the door ring fillets in the different areas, carrying out structural division on the door ring structure to obtain the structural shape of each door ring in the plurality of structural members; and abutting and connecting two adjacent door ring pieces.

7. The method of designing a door ring structure according to claim 6, wherein the door ring structure comprises: the A column reinforcement and the upper side beam reinforcement are in butt joint connection;

the structural division is carried out on the door ring structure based on the stress states of different areas and the setting positions of the door ring fillets in different areas, and the structural division comprises the following steps:

based on the area where the A-pillar reinforcement and the roof side rail reinforcement are located receives a frontal collision and an offset collision, a first door ring fillet is arranged on the roof side rail reinforcement, and a butt joint seam of the A-pillar reinforcement and the roof side rail reinforcement is arranged outside the area where the first door ring fillet is located.

8. The method of designing a door ring structure according to claim 7, further comprising: the upper side beam rear section is in butt joint with the upper side beam reinforcement, and the B column reinforcement is in butt joint with the upper side beam rear section;

the structural division is carried out on the door ring structure based on the stress states of different areas and the setting positions of the door ring fillets in different areas, and the structural division comprises the following steps:

based on the roof side rail reinforcement with the roof side rail rear section place the regional roof pressure that bears, with the roof side rail rear section with the region that the B post reinforcement is located bears the roof pressure, will second door ring fillet setting is in on the roof side rail rear section, and will the roof side rail reinforcement with the butt joint seam setting of roof side rail rear section is in outside the region that the second door ring fillet is located, will the butt joint seam setting of B post reinforcement with the roof side rail rear section is in outside the region that the second door ring fillet is located.

9. The method of designing a door ring structure according to claim 8, further comprising: the threshold reinforcement is in butt joint with the B-pillar reinforcement at one end and the A-pillar reinforcement at the other end;

the structural division is carried out on the door ring structure based on the stress states of different areas and the setting positions of the door ring fillets in different areas, and the structural division comprises the following steps:

based on the side collision bearing of the B-pillar reinforcement and the area where the threshold reinforcement is located, arranging a third door ring fillet on the threshold reinforcement, and arranging a butt joint seam of the B-pillar reinforcement and the threshold reinforcement outside the area where the third door ring fillet is located;

based on the A column reinforcement and the area where the threshold reinforcement is located bears side collision, the fourth door ring fillet is arranged on the A column reinforcement, and the butt joint seam of the A column reinforcement and the threshold reinforcement is arranged outside the area where the fourth door ring fillet is located.

10. The method of designing a door ring structure according to claim 9, wherein the door ring structure further comprises a C-pillar assembly; a first extension part is arranged on one side, far away from the upper side beam reinforcement, of the upper side beam rear section, and a second extension part is arranged on one side, far away from the A column reinforcement, of the threshold reinforcement; one end of the C column assembly is in butt joint with the first extension part, and the other end of the C column assembly is in butt joint with the second extension part;

the structural division is carried out on the door ring structure based on the stress states of different areas and the setting positions of the door ring fillets in different areas, and the structural division comprises the following steps:

based on the fact that the area where the rear section of the upper side beam and the C column assembly are located bears the jacking pressure, a seventh door ring fillet is arranged on the C column assembly, and a butt joint seam of the rear section of the upper side beam and the C column assembly is arranged outside the area where the seventh door ring fillet is located;

based on the threshold reinforcement and the region where the C-pillar assembly is located receives a side impact collision, an eighth door ring fillet is arranged on the C-pillar assembly, and a butt joint seam of the threshold reinforcement and the C-pillar assembly is arranged outside the region where the eighth door ring fillet is located.

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