Sheet Metal Rim Profile Segmentation for Beam Strength
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Solution Overview
Problem
Existing metal containers for sensitive equipment lack sufficient beam strength and watertight sealing in their rim profiles, particularly when made from aluminum sheet material, which can lead to deformation and leakage during transportation and storage.
Innovation Solution
A container design featuring a rim profile formed by folding sheet metal into two separate enclosed zones with intersecting runs, where the first run includes vertical, horizontal, and additional sections, and the second run meets the first at a junction, enhancing strength and allowing for a watertight seal with a nested lid profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple folded rim profile is used to reduce manufacturing complexity, then ease of manufacture is improved, but beam strength and structural integrity deteriorate
Solution Approach 1:
The rim profile is divided into two separate runs of material that are fixed together at the junction. The first run extends from the outer wall inward and upward, while the second run extends downward to meet the first run, creating two enclosed zones. This segmentation allows each run to be formed independently through folding, maintaining ease of manufacture while the combined structure provides enhanced beam strength.
Solution Approach 2:
The rim profile utilizes multiple dimensional layers by creating a multi-level folded structure with runs extending in different directions (inward, upward, downward). The first horizontal section and second horizontal section are positioned at different elevations, creating a three-dimensional profile that increases structural rigidity and beam strength without complicating the manufacturing process.
2Weight of moving object
If the rim profile is made lighter to reduce container weight, then weight is reduced, but resistance to deformation and structural integrity worsen
Solution Approach 1:
The rim is segmented into two runs that create two enclosed zones, distributing structural loads more effectively. This allows the use of lighter sheet material while maintaining strength, as the segmented structure prevents stress concentration that would occur in a single continuous fold.
Solution Approach 2:
The rim profile functions as a composite structure where two runs of material are joined to create a combined structural element. This composite approach allows the use of lighter materials while achieving the structural integrity of a heavier single-piece construction, as the joined runs work together to resist deformation forces.
3Strength
If a complex multi-zone folded rim profile is implemented to increase beam strength, then strength is improved, but manufacturing complexity increases
Solution Approach 1:
The rim profile is designed to be self-forming through a sequence of folds in the sheet material. The folding process itself creates the complex multi-zone structure without requiring additional tools, fixtures, or assembly steps. The material serves its own structural purpose, forming the strengthened rim profile through its own geometry rather than requiring external reinforcement elements.
4Ease of manufacture
If the rim profile uses fewer folds to simplify manufacturing, then ease of manufacture is improved, but watertight sealing capability deteriorates
Solution Approach 1:
The segmentation into two runs creates two enclosed zones that work together to provide sealing surfaces. The first enclosed zone and second enclosed zone are formed by the respective runs of material, creating multiple barriers against water penetration while maintaining a relatively simple folded structure that is easy to manufacture.
Data Source
Figure 1
AI summary
A container body 1 has a rim profile formed by folding sheet metal material. The profile defines at least two separate zones 14, 15 which are completely enclosed by the folded material and two runs of the material 5, 10 meet at the junction 16 between the two zones 14, 15 and are welded to one another at that junction. A lid 2 also has a rim profile folded from sheet material.