Aluminum Front Body Structure With Ribbed Load Paths
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Solution Overview
Problem
Conventional vehicle front body structures made of steel have limitations in design freedom, leading to increased parts, weight, and manufacturing costs, with reduced coupling strength between components.
Innovation Solution
A front body structure using aluminum extrusion members for side members and aluminum die casting for mounting units, incorporating reinforcing ribs and coupling portions to integrate front structure parts, reducing the number of components and enhancing rigidity and crashworthiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional steel body parts are manufactured by press method and coupled by welding or bolting, then manufacturing process is established, but design freedom is limited, number of parts increases, manufacturing cost increases, weight increases, and coupling strength is reduced
Solution Approach 1:
The patent combines multiple separate body parts (side members, mounting brackets, reinforcement structures) into integrated aluminum extrusion members. The extrusion process allows complex three-dimensional shapes with built-in mounting features and reinforcement elements to be formed as single continuous structures, eliminating the need for separate components and their associated fasteners.
Solution Approach 2:
The patent transitions from steel material to aluminum material, changing the physical parameters of the body structure. This material parameter change enables both weight reduction and design flexibility, as aluminum extrusions can be formed into complex shapes more easily than steel press parts, and the extrusion process allows for integrated design of multiple functions in single components.
2Ease of manufacture
If conventional steel body parts are manufactured by press method and coupled by welding or bolting, then manufacturing process is established, but weight increases
Solution Approach 1:
The patent changes the material parameter from steel to aluminum, which has approximately one-third the density of steel. This fundamental material parameter change directly reduces the weight of body parts while the extrusion manufacturing process maintains ease of production through continuous forming operations.
Solution Approach 2:
By combining multiple separate parts into integrated aluminum extrusion members, the total material volume is reduced. The merged structures eliminate redundant material from separate components and fasteners, while the extrusion process efficiently forms complex integrated shapes in a single continuous operation.
3Ease of manufacture
If conventional steel body parts are manufactured by press method and coupled by welding or bolting, then manufacturing process is established, but coupling strength between body parts is reduced
Solution Approach 1:
The patent merges previously separate body parts into integrated aluminum extrusion members, eliminating the need for mechanical fasteners and welds. The continuous extruded structure provides inherent structural continuity and strength, with load paths flowing smoothly through the integrated geometry without interruption from fastener holes or weld seams.
Solution Approach 2:
The transition from steel to aluminum material, combined with the extrusion manufacturing process, changes the structural parameters to achieve strength through integrated geometry rather than through fastening mechanisms. The extrusion process creates optimized cross-sectional shapes that provide high strength-to-weight ratio and inherent structural integrity.
Data Source
AI summary
A front body structure for mounting front structure parts including a front back beam unit, a sub-frame, and a fender apron upper member thereon includes: front side members provided on left and right sides, respectively, in a width direction of a vehicle body while extending in a longitudinal direction of the vehicle body, each front side member being manufactured of an aluminum extrusion member; and mounting units coupled to front portions of the front side members, respectively, to mount the front structure parts thereon, each mounting unit being made of an aluminum material, wherein the mounting units form a plurality of load paths connected to the front side members through a plurality of reinforcing ribs outside the front side members.