High-strength roll-formed section with projection nut
The "目"-shaped high-strength roll-formed profile formed by splicing and welding solves the problem of easy deformation of aluminum profiles, improves the safety and lightweight effect of battery casing, simplifies the production process and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGYUN INDAL CORP
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-12
AI Technical Summary
The aluminum profiles used in existing car door sills are prone to deformation during side impacts and side pillar impacts, which can lead to damage to the battery casing. Furthermore, traditional stamped sheet metal has low strength and high cost, which is not conducive to the lightweighting of new energy vehicles.
High-strength roll-formed profiles with projection weld nuts are used. The profiles are formed by welding "日"-shaped and "C"-shaped roll-formed beams to increase the peak contact force and overall strength, control the deformation sequence, and improve bending resistance and stiffness.
It improves the impact safety of the battery casing, reduces material weight, simplifies the manufacturing process, reduces costs, and achieves lightweighting.
Smart Images
Figure CN224349004U_ABST
Abstract
Claims
1. A high-strength roll-formed profile with projection weld nuts, characterized in that: The roll-formed profile is formed by welding a "day"-shaped roll-formed beam and a "C"-shaped roll-formed beam. The overall cross-section of the roll-formed profile is "eye"-shaped, including a first cavity (101), a second cavity (102) and a third cavity (103) arranged side by side. The first cavity (101) and the second cavity (102) are separated by a first intermediate reinforcing rib (1). The second cavity (102) and the third cavity (103) are separated by a second intermediate reinforcing rib (2). A projection welding nut (4) is welded on the right vertical rib (3) of the third cavity (103). The projection welding nut (4) is located inside the third cavity (103). A pre-punched hole is provided at the position where the projection welding nut (4) is welded on the right vertical rib (3).
2. The high-strength roll-formed profile with projection welded nut according to claim 1, characterized in that: The "day"-shaped roll-formed beam is a closed structure formed by cold bending a steel plate multiple times, including a first intermediate reinforcing rib (1), a middle upper horizontal rib (6), a second intermediate reinforcing rib (2), a first welding hook edge (7), a second welding hook edge (8), a right upper horizontal rib (9), a right vertical rib (3), a right lower horizontal rib (10) and a middle lower horizontal rib (11); the first welding hook edge (7) and the second welding hook edge (8) are respectively welded to the right lower horizontal rib (10) and the second intermediate reinforcing rib (2); the second intermediate reinforcing rib (2), the middle upper horizontal rib (6), the first intermediate reinforcing rib (1) and the middle lower horizontal rib (11) enclose the second cavity (102) in sequence; the right lower horizontal rib (10), the right vertical rib (3), the right upper horizontal rib (9) and the second intermediate reinforcing rib (2) enclose and form the third cavity (103).
3. The high-strength roll-formed profile with projection welded nut according to claim 2, characterized in that: The "C"-shaped roll-formed beam is formed by cold bending multiple times, including a third welding hook edge (12), a left upper horizontal rib (13), a left vertical rib (14), a left lower horizontal rib (15) and a fourth welding hook edge (16). The third welding hook edge (12) and the fourth welding hook edge (16) are respectively welded to the top end and the bottom end of the first intermediate reinforcing rib (1).
4. The high-strength roll-formed profile with projection welded nut according to claim 3, characterized in that: The length of the first welding hook edge (7) ≥ 5 mm, the length of the second welding hook edge (8) ≥ 4 mm, and the lengths of the third welding hook edge (12) and the fourth welding hook edge (16) are both ≥ 4 mm.
5. The high-strength roll-formed profile with projection welded nut according to claim 4, characterized in that: The first cavity (101) is rectangular or trapezoidal, the second cavity (102) is rectangular or irregular, and the third cavity (103) is rectangular or trapezoidal.
6. The high-strength roll-formed profile with projection welded nut according to claim 5, characterized in that: The included angle c formed by the third welded hook edge (12) and the upper left horizontal rib (13) is 30~135°, and the included angle f formed by the lower left horizontal rib (15) and the fourth welded hook edge (16) is 30~135°. The included angle c and the included angle f are the same or different. The included angle a formed by the upper middle horizontal rib (6) and the second middle reinforcing rib (2) is 30~135°, and the included angle b formed by the lower middle horizontal rib (11) and the second middle reinforcing rib (2) is 30~135°. The included angle a and the included angle b are the same or different. The included angle d formed by the upper right horizontal rib (9) and the right vertical rib (3) is 30~135°, and the included angle e formed by the lower right horizontal rib (10) and the right vertical rib (3) is 30~135°. The included angle d and the included angle e are the same or different. The included angle c≤a≤d; the included angle f≤b≤e.