一种抗延迟开裂的超高强钢、变曲率汽车防撞梁
By cutting off the rounded corners of the inner arc surface of the anti-collision beam transition section and adding patch reinforcements, the molding difficulty and delayed cracking problem of ultra-high strength steel variable curvature anti-collision beam were solved, achieving higher safety and lighter weight effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGYUN INDAL CORP
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing ultra-high strength steel variable curvature anti-collision beams are difficult to form during processing and are prone to delayed cracking, affecting the safety of the entire vehicle. Traditional designs cannot meet both lightweight and safety requirements.
The inner arc surface of the anti-collision beam is rounded off and reinforced with patches. The strength of the reinforced patch material is lower than that of the main beam. Steel that is not sensitive to delayed cracking is used to reduce internal stress and improve resistance to delayed cracking.
The manufacturing difficulty of the crash beam was reduced, the resistance to delayed cracking was significantly improved, the overall vehicle safety requirements were met, and the impact resistance of the crash beam was maintained or improved.
Smart Images
Figure CN224511052U_ABST
Abstract
Claims
1. An ultra-high strength steel, delayed fracture resistant, variable curvature automotive bumper beam characterized by: The vehicle anti-collision beam includes a crossbeam body (1) and a patch reinforcement (2). The inner arc surface of the transition section at both ends of the crossbeam body (1) is rounded off. The patch reinforcement (2) is fixed at the rounded cut of the inner arc surface. The arc of the patch reinforcement (2) is the same as the arc of the transition section on the crossbeam body (1). The cross-section of the crossbeam body (1) is "U".
2. The delayed fracture resistant ultra-high strength steel, variable curvature automotive crash beam of claim 1, wherein: The length of the inner arc surface cut off at the transition section of the main body of the crossbeam (1) is the length of the transition section or extends 5~100mm to both sides of the transition section.
3. The ultra-high-strength steel, variable-curvature automotive crash beam with resistance to delayed cracking according to claim 2, characterized in that: The material strength of the patch reinforcement (2) is different from that of the main beam (1). The tensile strength of the patch reinforcement (2) is 450~1200MPa, the material thickness is 1.2~3.5mm, and the length is 20~200mm extended on both sides along the length of the cut section.
4. The delayed fracture resistant ultra-high strength steel, variable curvature automotive crash beam of claim 3, wherein: The patch reinforcement (2) is a "C"-shaped reinforcement plate that is snapped onto the inner arc surface of the cut-off transition section and welded to the main body of the crossbeam (1).
5. The ultra-high-strength steel, variable-curvature automotive crash beam with resistance to delayed cracking according to claim 3, characterized in that: The patch reinforcement (2) includes a first reinforcing metal plate (2-1) and a second reinforcing metal plate (2-2). Both reinforcing metal plates are configured as a "C" shape. The first reinforcing metal plate (2-1) is fastened to the recess in the middle of the "U"-shaped crossbeam body and welded to the two adjacent side walls of the two cavities adjacent to the crossbeam body. The second reinforcing metal plate (2-2) is fastened to the inner arc surface of the crossbeam body (1) and covers the first reinforcing metal plate (2-1).
6. The ultra-high-strength steel, variable curvature automotive crash beam with resistance to delayed cracking according to claim 3, characterized in that: The patch reinforcement (2) is tubular and includes eight identical metal tubes (2-3). The metal tubes (2-3) are fixed in pairs at the inner arc surface cut-off point of the transition section of the main body of the beam (1). The two metal tubes located in the same cavity at one end of the main body of the beam (1) are welded and fixed together. The metal tube wall is welded or riveted to the cavity wall of the main body of the beam.