Life Raft Buoyancy Tube Seam Layout for Automated Assembly
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Solution Overview
Problem
Existing inflatable life rafts face manufacturing challenges due to complex seam construction, including long assembly times, seam alignment difficulties, and low automation potential, leading to reduced production rates and increased manufacturing complexity.
Innovation Solution
A toroidal polyhedron buoyancy tube design with continuous seam joining process, utilizing non-overlapping elongated seams to form a life raft, allowing for efficient and automated manufacturing without seam cross-overs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If complex seam construction is used in inflatable life rafts, then structural integrity is improved, but manufacturing time increases and production rate decreases
Solution Approach 1:
The buoyancy tube is divided into multiple panels (first panel, second panel, third panel, fourth panel) that are connected through seams. This segmentation allows for modular construction where each panel can be manufactured and prepared separately, then assembled through standardized seam connections, improving both structural integrity and manufacturing efficiency.
Solution Approach 2:
The panels are pre-configured with specific edge configurations (first edge, second edge, third edge, fourth edge) and seam locations before assembly. The seams are positioned and configured in advance during panel fabrication, allowing for automated or semi-automated assembly processes that reduce on-site construction time while maintaining structural requirements.
2Strength
If complex seam construction with multiple overlapping seams is used, then structural integrity is improved, but seam alignment difficulty increases and automation potential decreases
Solution Approach 1:
The panel edges are configured with asymmetric features (first edge, second edge, third edge, fourth edge with distinct characteristics) that enable unambiguous alignment during assembly. The seam configurations differ between panels but follow a systematic pattern that guides automated or manual alignment processes, reducing alignment complexity while maintaining structural integrity.
Solution Approach 2:
Alignment features and seam positions are pre-configured on each panel during manufacturing. The panels arrive at the assembly stage with predetermined seam locations and edge configurations that facilitate straightforward joining, eliminating the need for complex real-time alignment procedures.
3Strength
If traditional seam joining processes are used, then structural integrity is maintained, but manufacturing time increases
Solution Approach 1:
Seams are pre-positioned and pre-configured on panels during panel fabrication. The seam locations, lengths, and configurations are determined and prepared in advance, allowing for rapid assembly operations where panels are simply joined at predetermined locations rather than requiring measurement and positioning during assembly.
Solution Approach 2:
The buoyancy tube is divided into multiple panels with standardized seam connections. This segmentation allows for parallel manufacturing of panels and streamlined assembly processes where multiple panels can be joined simultaneously or in a standardized sequence, reducing total assembly time while maintaining structural integrity through consistent seam construction.
Data Source
AI summary
Disclosed is a buoyancy tube for a life raft having: a first panel including: a first panel top edge and a first panel bottom edge, the first panel top edge defines a first repeating pattern, and the first panel bottom edge defines a second repeating pattern that is a rotated version of the first panel top edge; a second panel that has a same shape as the first panel, the first and second panels connected by a first elongated seam and a second elongated seam that are non-overlapping with one another, the first and second panels, when connected, define outer an inner boundaries of the life raft, the outer boundary defines an outer polygon having outer sides and the inner boundary defines an inner polygon having inner sides such that each of the plurality of outer sides is parallel with one of the plurality of inner sides.