Helically Bent Sheet Metal Container Welded Joint
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Solution Overview
Problem
Existing containers made from helically bent sheet metal strips face limitations in achieving large storage volumes and increased mechanical stability while ensuring tightness and media resistance, particularly when dealing with thicker sheet metals, as the known seam systems fail to provide adequate mechanical stability for applications like storing fluid media.
Innovation Solution
A container design featuring a welded joint with a first weld seam applied from the outside and a second weld seam applied from the inside, creating a homogeneous fully fused joint that eliminates gap regions and enhances load-bearing capacity and tightness, allowing for larger container sizes and thicker wall thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If seam connection systems are used to join border portions of helically bent sheet metal strip, then production is simple and rapid, but mechanical stability and tightness are insufficient for large container volumes and thick sheet metals
Solution Approach 1:
The patent replaces the mechanical seam connection system with a welded joint system. The welded joint provides superior mechanical strength and reliability for thick sheet metals while maintaining production efficiency. The welding process creates a fusion bond that is stronger than mechanical interlocking, resolving the contradiction between ease of manufacture and mechanical stability.
2Reliability
If two separate weld seams are used to connect overlapping border regions, then fluid-tight connection is achieved, but gap regions remain that are susceptible to corrosion
Solution Approach 1:
The patent merges the two separate weld seams into a single continuous weld seam that runs through the overlapping region. This continuous weld eliminates the gap region between the first and second weld seams, preventing corrosion while maintaining fluid-tightness. The overlapping border portions are joined in a single welding operation, creating a homogeneous welded joint without discontinuities.
3Strength
If welded joints replace seam connections for thick sheet metals, then mechanical stability and tightness are significantly improved, but production complexity increases
Solution Approach 1:
The patent changes the welding parameters and process configuration to simplify production. By using a single continuous weld seam instead of two separate welds, the welding process becomes more straightforward and easier to control. The method allows for automated welding operations and reduces the complexity of positioning and aligning multiple weld seams, thereby reducing production complexity while maintaining high mechanical stability.
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 provides a reliable, high-strength, and leak-proof connection that supports large container dimensions with increased mechanical stability and purity, addressing the limitations of previous seam systems by ensuring absolute tightness and resistance to corrosion.
Implementation Method 1
the border portions, which run adjacently one above another in terms of height, of the sheet metal strip are connected to one another via a welded joint
Data Source
AI summary
A container is produced from a single-layered, helically bent sheet metal strip. In the strip's upper or lower border region a first helically running border portion of the strip is bent out via a helically running outwardly bent edge with a curved region toward the outside of the container as a protruding flange. A second helically running border portion is in the lower/upper border region. The border regions each border one another adjacently height-wise and are connected to one another in a fluid-tight manner via a continuous, helically running welded joint. The second border portion runs rectilinearly in the plane of the strip and the welded joint has a first and a second weld seam. The first and second weld seams are applied from the outside and the inside of the container, respectively, and the two weld seams are fused to each other in the weld route thereof.