One-Piece Vehicle Front Wall With Thickened Footwell Structure
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Solution Overview
Problem
Current motor vehicle body manufacturing methods for self-supporting structures, such as front walls, face challenges in achieving cost-effective production while enhancing crash safety and passenger compartment safety, particularly in the underfloor region and front footwell area, where existing methods require multiple components and welding, leading to increased production costs and potential corrosion issues.
Innovation Solution
A one-piece sheet metal forming component for the front wall is developed, where the partition wall and footwell metal sheet are connected in a single press stroke, with varying wall thickness and tensile strength regions, eliminating the need for additional cross members and allowing for localized reinforcing patches and integrated forming geometries to enhance rigidity and crash performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple separate components are used for the front wall and footwell metal sheet, then manufacturing flexibility and ease of assembly are improved, but production costs increase and corrosion resistance deteriorates due to required welding joints
Solution Approach 1:
The patent merges the front wall and footwell metal sheet into a single integrated component manufactured in one press stroke. This eliminates the welding joint between these components, preventing corrosion at the joint while maintaining manufacturing efficiency through single-step production.
Solution Approach 2:
The patent segments the integrated component into regions with different wall thicknesses and material properties. The footwell metal sheet has greater wall thickness than the partition wall, creating optimized zones for different functional requirements while maintaining structural integrity.
2Strength
If additional cross members are installed in the transition region, then structural rigidity and crash safety are improved, but device complexity and production costs increase
Solution Approach 1:
The patent integrates the cross member function directly into the transition region of the single-piece component. The transition region itself provides the structural reinforcement that would otherwise require a separate cross member, eliminating additional components while maintaining crash safety.
Solution Approach 2:
The transition region serves multiple functions simultaneously: it connects the partition wall to the footwell metal sheet, provides structural reinforcement, and eliminates the need for a separate cross member. This multi-functional design reduces component count while maintaining strength.
3Strength
If the footwell metal sheet has greater wall thickness, then crash safety and rigidity are improved, but weight increases
Solution Approach 1:
The patent applies different wall thicknesses to different regions of the component. The footwell metal sheet has greater wall thickness for enhanced crash safety in the passenger compartment area, while the partition wall has reduced wall thickness to minimize weight. This local differentiation optimizes the strength-to-weight ratio.
Data Source
AI summary
A front wall for a motor vehicle, which has a partition wall to an engine compartment located at the front in the longitudinal direction (x) of the motor vehicle, wherein the partition wall is oriented in the installed state in the vertical direction (z) of the motor vehicle and, connected to it in one piece, has a front region of a footwell metal sheet, wherein the footwell metal sheet runs at least in portions in the longitudinal direction (x) of the motor vehicle, the front wall being produced as a one-piece sheet-metal forming component, in particular in a single press stroke, characterized in that the footwell metal sheet has a greater wall thickness and/or tensile strength than the partition wall.