Integrally Cast Bumper Beam with Multi-Alloy Regions
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Solution Overview
Problem
Current vehicle bumper systems face challenges in reducing manufacturing costs and improving energy absorption properties while maintaining performance, as they require multiple materials and complex assembly processes.
Innovation Solution
A bumper beam and crash box system made from multiple metal alloys, where different regions are cast integrally with each other, allowing for specialized performance and mass characteristics, such as crush and energy transfer, without the need for additional fasteners like welding or adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple materials and complex assembly processes are used in current bumper systems, then structural integrity and energy absorption can be maintained, but manufacturing costs and complexity increase
Solution Approach 1:
The patent combines multiple alloy regions into a single integrally cast bumper beam, eliminating the need for separate components and fasteners. The bumper beam is manufactured as one unified piece with different alloy compositions in different regions, merging what would traditionally be multiple parts requiring welding or adhesive bonding.
Solution Approach 2:
The patent employs composite alloy design where the bumper beam contains multiple alloy regions (e.g., aluminum alloy in energy-absorbing sections, steel alloy in high-strength sections) within a single component. This allows each region to be optimized for its specific function while being manufactured as an integral structure.
2Strength
If traditional manufacturing methods with multiple fasteners are used, then assembly strength can be achieved, but manufacturing costs and time increase
Solution Approach 1:
The invention eliminates fasteners (welds, adhesives, mechanical fasteners) by integrating the crash box and bumper beam into a single integrally cast component. This removes the need for separate assembly operations and fastening materials, reducing both cost and manufacturing steps while maintaining structural strength through the monolithic construction.
Solution Approach 2:
The patent extracts and eliminates the fastening system entirely from the bumper assembly. By casting the crash box and bumper beam as one integral piece, the invention removes the need for welds, adhesives, and mechanical fasteners that would otherwise be required to join separate components.
3Ease of manufacture
If homogeneous alloy is used throughout the bumper beam, then manufacturing is simpler, but energy absorption and mass characteristics cannot be optimized for different regions
Solution Approach 1:
The patent applies local quality by assigning different alloy compositions to different regions of the bumper beam based on functional requirements. Energy-absorbing sections use aluminum alloy with specific properties, while high-strength sections use steel alloy, allowing each region to be optimized for its specific role in crash performance.
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
This approach reduces manufacturing steps and costs, results in a stronger, lighter, and more cost-effective bumper system with improved energy absorption properties compared to prior designs, and allows for weight reduction without compromising structural integrity.
Implementation Method 1
metal casting a bumper beam having at least a first portion comprised of a first alloy and a second portion comprised of a second alloy that is different than the first alloy
Data Source
AI summary
A bumper beam system is provided that includes a bumper beam that is cast from metal and has at least a first portion comprised of a first alloy and a second portion comprised of a second alloy that is different than the first alloy. Furthermore, a crash box is provided that comprises a first portion comprised of a first alloy and a second portion comprised of a second alloy that is different than the first alloy. Additionally, a bumper beam system is provided that has a bumper beam and a crash box. The bumper beam includes at least a first bumper beam portion that is comprised of a first bumper beam alloy, and the crash box includes at least a first crash box portion that is comprised of a first crash box alloy. Methods of manufacturing the bumper beam system and crash boxes are also provided.