Integrated steel multi-ribbed multi-cavity roll-formed profile

Abstract

An integrated steel multi-ribbed, multi-cavity roll-formed profile includes a multi-cavity box body. The multi-cavity box body is a closed multi-cavity structure formed by bending a single sheet of material through multiple bends. The two ends of this sheet are welded to the top of the middle cavity, with the weld seam located at the center of the top surface of the multi-cavity box body. The cross-section of the multi-cavity box body is divided into an odd number of closed cavities, with a minimum of three cavities, and they are symmetrical from left to right. The multi-cavity structure provides stable support and significantly improves the bending resistance and energy absorption of the roll-formed profile during collisions.

Description

Technical Field

[0001] This utility model relates to an integrated steel multi-ribbed multi-cavity roll-formed profile, and in particular, an integrated steel multi-ribbed multi-cavity roll-formed profile, belonging to the field of automotive profile processing technology. Background Technology

[0002] With increasing global emphasis on environmental protection and energy conservation, lightweighting has become a crucial development direction for the automotive industry. Currently, domestically produced automobiles have achieved significant growth in production, sales, and market share, particularly excelling in the new energy vehicle sector. Consequently, new energy vehicles place higher demands on battery pack protection, body structural strength, and lightweighting, prompting companies to develop more advanced structural profiles and processing technologies. To meet the requirements of lightweight body structures, traditional methods typically employ aluminum alloy profiles. However, due to the low strength of aluminum alloys, thicker profiles are required, necessitating more complex multi-cavity structures to further enhance strength, leading to high manufacturing costs. Secondly, the predominantly steel body structure presents challenges in connecting dissimilar materials like steel and aluminum, such as electrochemical corrosion at the steel-aluminum interface. Steel-aluminum connections can only be achieved through adhesive bonding, bolting, and riveting, resulting in low strength at the connection points, complex processing procedures, and increased overall vehicle manufacturing costs. Furthermore, aluminum profiles are difficult to repair after collisions, potentially requiring replacement of the entire component, increasing repair costs. As the strength of high-strength steel continues to improve, its advantages are becoming increasingly prominent. For example, steel... Components such as automotive anti-collision beams and sill reinforcement beams often feature single-cavity or simple profile structures. These structures, in order to meet strength requirements, are often quite heavy, hindering lightweight automotive design. Secondly, their structural strength is insufficient; single-cavity structures have limitations in bending and torsional resistance, making it difficult to meet the high strength and safety requirements of modern automobiles. Furthermore, the higher the strength of high-strength steel, the more difficult it is to process; traditional stamping processes are insufficient to meet its forming requirements, resulting in low production efficiency, low material utilization, and high costs. To address the increasing demands of automakers for lightweight and high-strength components, the development of multi-cavity, multi-ribbed roll forming technology has been driven. Multi-cavity, multi-ribbed integrated roll forming technology is an advanced manufacturing technology developed based on traditional profile processing techniques, combined with the modern automotive requirements for lightweighting, high strength, and high safety. It not only enables the forming of complex cross-sectional structures, significantly improving component performance, but also effectively reduces costs. Beyond the automotive field, multi-cavity, multi-ribbed roll forming technology can also be applied to aerospace, rail transportation, and other fields, promoting lightweight development in these industries and possessing broad application prospects. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an integrated steel multi-ribbed multi-cavity roll-formed profile, which can improve the performance of the profile, reduce the weight of the vehicle body, and achieve the goal of lightweighting.

[0004] The problem described in this utility model is solved by the following technical solution:

[0005] An integrated steel multi-ribbed multi-cavity roll-formed profile includes a multi-cavity box body; the multi-cavity box body is a closed multi-cavity structure formed by bending a single sheet of material through multiple bends, with both ends of the sheet welded to the top of the middle cavity, and the weld seam located at the center of the top surface of the multi-cavity box body; the cross-section of the multi-cavity box body is divided into an odd number of closed cavities, with a minimum of three cavities, and they are arranged in a left-right symmetrical manner.

[0006] An integral steel multi-ribbed multi-cavity roll-formed profile, wherein the central cavity of the multi-cavity box is square or circular, and the top of the central cavity is welded to the center of the top surface of the outer side wall of the multi-cavity box; the top surface of the multi-cavity box is a straight horizontal plane or, based on the horizontal plane, the central part is an inwardly concave arc surface.

[0007] The integrated steel multi-ribbed multi-cavity roll-formed profile has five cavities inside the multi-cavity box. The rightmost end of the lower left cavity is welded to the leftmost end of the lower right cavity, and the weld is the lowest end of the middle cavity. The bottom surfaces of the lower left and lower right cavities are both horizontal. The left and right ends of the middle cavity are welded to the side walls of the multi-cavity box, respectively. The left side is the left weld and the right side is the right weld. The upper and lower ends of the left weld correspond to two cavities, and the upper and lower ends of the right weld correspond to the other two cavities.

[0008] The integrated steel multi-ribbed multi-cavity roll-formed profile has three sidewall configurations on its left and right sides: vertical, inclined, and folded. In the vertical configuration, the two outermost sidewalls are vertical surfaces. In the inclined configuration, the two outermost sidewalls are inclined surfaces, with the distance between the lowest points of the two inclined surfaces being greater than the distance between the highest points of the two inclined surfaces. In the folded configuration, the left sidewall is divided by the left weld seam, with the upper section being a vertical surface and the lower section being an inclined surface. The distance between the lowest point of the inclined surface and the perpendicular bisector of the multi-cavity box is greater than the distance between the highest point of the inclined surface and the perpendicular bisector of the multi-cavity box. The right sidewall is symmetrical to the left sidewall about the perpendicular bisector of the multi-cavity box.

[0009] The multi-cavity structure of this invention can provide stable support, significantly improving the bending resistance and energy absorption of the roll-formed profile during the collision process; the product has high strength and high rigidity, significantly improving the structural stability of the product.

[0010] The multi-cavity structure designed in this utility model has the following beneficial effects:

[0011] (1) Bending resistance: The multi-cavity structure can effectively disperse and absorb impact force through the distribution of multiple independent cavities, thereby improving bending resistance;

[0012] (2) Torsional performance: Multi-ribbed structures (such as reinforcing ribs, ribs, etc.) can enhance the torsional performance of the profile and improve the overall structural stability;

[0013] (3) Lightweighting: By optimizing the cross-sectional design, the amount of material used is reduced while maintaining or improving the structural strength, the goal of lightweighting is achieved. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the drooping shape of the left and right side walls of the roll-formed profile of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the inclined shape of the left and right side walls of the roll-formed profile of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the folded shape of the left and right side walls of the roll-formed profile of this utility model. Detailed Implementation

[0017] See Figure 1 , 2 and Figure 3 This utility model includes a multi-cavity box body; the multi-cavity box body is a closed multi-cavity structure formed by bending a piece of plate through multiple bends, the two ends of the plate body are welded to the top of the middle cavity, and the weld is at the center of the top surface of the multi-cavity box body; the cross-section of the multi-cavity box body is divided into an odd number of closed cavities, with a minimum of three cavities, and they are symmetrical from left to right.

[0018] The central cavity of the multi-cavity box is square or circular, and the top of the central cavity is welded to the center of the top surface of the outer wall of the multi-cavity box; the top surface of the multi-cavity box is a straight horizontal plane or, based on a horizontal plane, the central part is an inwardly concave arc surface; when the top surface is straight, the profile is easy to install; if the central part is an inwardly concave arc surface based on a horizontal plane, this serves to enhance the collapse effect; Figure 1 For example, Figure 1 The top surfaces of the first and third ones from left to right are straight horizontal planes, while the second and fourth ones are curved surfaces with an inward concave center, based on the horizontal plane.

[0019] When the central cavity is circular, it can serve as an additional functional hole for the vehicle body; for example, as a door sill beam structure, it can realize functions such as cooling pipes and exhaust pipes, which conforms to the integrated design of roll forming, reduces the difficulty of vehicle body space layout, can significantly reduce the number of parts and assembly processes, and improve production efficiency.

[0020] The multi-cavity box contains five cavities. The rightmost end of the lower left cavity is welded to the leftmost end of the lower right cavity, and the weld is at the lowest end of the middle cavity. The bottom surfaces of the lower left and lower right cavities are both horizontal. The left and right ends of the middle cavity are welded to the side walls of the multi-cavity box, respectively. The left side is the left weld, and the right side is the right weld. The upper and lower ends of the left weld correspond to two cavities, and the upper and lower ends of the right weld correspond to the other two cavities.

[0021] The side walls on the left and right sides of the multi-cavity box have three forms: vertical, inclined, and folded. In the vertical form, the two outermost side walls of the multi-cavity box are vertical planes. In the inclined form, the two outermost side walls of the multi-cavity box are inclined planes, and the distance between the lowest points of the two inclined planes is greater than the distance between the highest points of the two inclined planes. In the folded form, the left side wall is divided by the left weld seam. The upper part of the left side wall is a vertical plane, and the lower part is an inclined plane. The distance between the lowest point of the inclined plane and the perpendicular bisector of the multi-cavity box is greater than the distance between the highest point of the inclined plane and the perpendicular bisector of the multi-cavity box. The right side wall is symmetrical to the left side wall about the perpendicular bisector of the multi-cavity box. Figure 1 This is a schematic diagram of a multi-cavity box with vertical side walls on both sides and welded on both sides.

[0022] With the side walls on both sides of the multi-cavity box in a folded state, the welding position serves as the dividing line. One half is a vertical plane support wall, and the other half is an inclined support arm with a certain angle. The inclined support arm can serve as a crushing guide, effectively dispersing and transmitting collision force, improving the strength and stiffness of the cross-sectional structure, and further enhancing the energy absorption effect of the collision. Figure 3 This is a schematic diagram showing the folded side walls of the left and right sides of a multi-cavity box.

[0023] With the side walls on both sides of the multi-cavity box being inclined, the roll-formed profile presents a symmetrical trapezoidal structure. The trapezoidal structure enhances the crushing and guiding function, further disperses and transmits the collision force, and greatly improves the strength, stiffness and energy absorption effect of the cross-sectional structure. Figure 2 This is a schematic diagram showing the inclined side walls on the left and right sides of a multi-cavity box.

Claims

1. A one-piece steel multi-ribbed, multi-cavity roll-formed profile, characterized in that: It includes a multi-cavity box body; the multi-cavity box body is a closed multi-cavity structure formed by bending a piece of plate through multiple bends. The two ends of this plate body are welded to the top of the middle cavity, and the weld is located at the center of the top surface of the multi-cavity box body. The cross-section of the multi-cavity box body is divided into an odd number of closed cavities, with a minimum of three cavities, and they are symmetrical from left to right.

2. The one-piece steel multi-web multi-cavity roll formed section according to claim 1, wherein: The central cavity of the multi-cavity box is square or circular, and the top of the central cavity is welded to the center of the top surface of the outer wall of the multi-cavity box; the top surface of the multi-cavity box is a straight horizontal plane or, based on the horizontal plane, the central part is an inwardly concave arc surface.

3. The one-piece steel multi-web multi-cavity roll formed section according to claim 2, wherein: The multi-cavity box contains five cavities. The rightmost end of the lower left cavity is welded to the leftmost end of the lower right cavity, and the weld is at the lowest end of the middle cavity. The bottom surfaces of the lower left and lower right cavities are both horizontal. The left and right ends of the middle cavity are welded to the side walls of the multi-cavity box, respectively. The left side is the left weld, and the right side is the right weld. The upper and lower ends of the left weld correspond to two cavities, and the upper and lower ends of the right weld correspond to the other two cavities.

4. The one-piece steel multi-web multi-cavity roll formed section according to claim 3, wherein: The side walls on the left and right sides of the multi-cavity box have three forms: vertical, inclined, and folded. In the vertical form, the two outermost side walls of the multi-cavity box are vertical planes. In the inclined form, the two outermost side walls of the multi-cavity box are inclined planes, and the distance between the lowest points of the two inclined planes is greater than the distance between the highest points of the two inclined planes. In the folded form, the left side wall is divided by the left weld seam. The upper part of the left side wall is a vertical plane, and the lower part is an inclined plane. The distance between the lowest point of the inclined plane and the perpendicular bisector of the multi-cavity box is greater than the distance between the highest point of the inclined plane and the perpendicular bisector of the multi-cavity box. The right side wall is symmetrical to the left side wall about the perpendicular bisector of the multi-cavity box.

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