Cold-Formed Sidewall Reinforcement with Local Transition Plates
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Solution Overview
Problem
Conventional vehicle body constructions face challenges in achieving optimal torsional rigidity and crash performance while minimizing material usage, particularly in areas like the transition sections between body components.
Innovation Solution
A tailor-made semi-finished product is designed with multiple blanks of varying steel compositions and thicknesses, incorporating reinforcement plates at specific transition sections to enhance torsional stiffness and crash performance through thermal joining before cold forming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional body construction is used, then high torsional rigidity is achieved through bulkhead areas, but material usage increases and lightweight design goals are compromised
Solution Approach 1:
The patent applies local quality by providing a reinforcing plate in at least one section of the tailor-made semi-finished product, specifically in transition areas between different body components (A-pillar, B-pillar, C-pillar, roof rack, sill). This localized reinforcement approach increases torsional rigidity only where needed rather than uniformly throughout the entire structure, thereby reducing overall material usage while maintaining required strength characteristics.
Solution Approach 2:
The patent utilizes composite materials by combining multiple blanks with different steel compositions and/or different thicknesses in a tailor-made semi-finished product. This allows optimization of material properties in different areas - using thinner, lighter materials where strength requirements are lower and thicker, stronger materials where reinforcement is needed, achieving a balance between torsional rigidity and material efficiency.
2Quantity of substance
If tailor-made semi-finished products with different blank thicknesses are used, then lightweight design is improved, but open nodes with low torsional stiffness are created at joint points
Solution Approach 1:
The patent addresses the weak torsional stiffness at open nodes by providing a reinforcing plate in at least one section, with particular emphasis on transition areas between different body components. This localized reinforcement strategy specifically targets the vulnerable joint points created by using thinner blanks elsewhere in the structure, restoring torsional stiffness where needed without compromising the overall lightweight design achieved through variable thickness blanks.
3Strength
If reinforcement plates are added to transition sections, then torsional rigidity and crash performance are improved, but device complexity increases
Solution Approach 1:
The patent merges the reinforcing plate with the tailor-made semi-finished product by materially connecting it to the plurality of blanks with different steel compositions and/or different thicknesses. This integration approach combines the reinforcement function with the existing lightweight structure, achieving improved crash performance and torsional rigidity without significantly increasing overall structural complexity, as the reinforcing plate becomes part of the unified semi-finished product rather than a separate additive component.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly improves torsional rigidity and crash performance by strategically doubling material in vulnerable areas, allowing for weight reduction and enhanced structural integrity.
Implementation Method 1
The reinforcement plate(s) are joined or bonded using a thermal joining process before cold forming the customized semi-finished product
Implementation Method 2
before cold forming the customized semi-finished product
Data Source
Figure 1~2
AI summary
The invention relates to a tailor-made semi-finished product (H, H') for the production of a cold-formed side wall reinforcement (10, 10') and a cold-formed side wall reinforcement (10, 10').