Airplane Fuselage Sector Positioning Device
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Solution Overview
Problem
Existing positioning systems for sectors in airplane fuselage production do not allow for relative positioning adjustments to correct dimensional tolerances or positioning errors, limiting the precision of the lamination mandrel's sectors and guides.
Innovation Solution
A positioning device is integrated between the mobile and fixed parts of each sector's guide, enabling adjustments along two directions (x, y) within a plane perpendicular to the guide's axis, using a central body with adjustable catch bodies to secure the sector's position, allowing for precise alignment and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid connection between sector and guide is used, then structural stability is improved, but positioning precision deteriorates due to inability to correct dimensional tolerances and positioning errors
Solution Approach 1:
The connection between sector and guide is transformed from static rigid to dynamic adjustable. The positioning device allows the sector to be positioned relative to the guide in two directions (x, y) within plane RP, enabling correction of dimensional tolerances while maintaining structural integrity during operation.
Solution Approach 2:
The positioning system is segmented into independent adjustable components: a central body with adjustable position within seat (42), multiple catch bodies (53) that can be independently positioned, and release elements (68) for each catch body. This segmentation allows precise incremental adjustment to correct positioning errors.
2Manufacturing precision
If adjustable positioning device is added, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The positioning device is divided into modular components: central body, multiple independent catch bodies, and release elements. Each catch body can be independently adjusted and locked, allowing precise positioning without requiring a completely complex adjustment mechanism for the entire system.
Solution Approach 2:
The catch bodies are designed as simple, replaceable components that can be easily manufactured and adjusted. Rather than using complex permanent adjustment mechanisms, the system uses simple catch bodies that can be repositioned and locked into place, reducing overall system complexity while maintaining precision.
Data Source
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AI summary
Positioning system of sectors of a device for producing an airplane fuselage. The lamination mandrel (4) comprises a plurality of sectors (12) borne by a supporting structure and mobile along guides (17) borne by the supporting structure (10) between: an expanded lamination position and a contracted disassembling position. Each guide (17) comprises a fixed part (17g) borne by the supporting structure (10) and a mobile part (18) sliding along/with respect to the fixed part (17g) in a rectilinear direction H. Between a portion of each mobile part (18) facing towards the respective sector (12) and the stiffening structure (21) a positioning device (P) is provided which allows adjustment of the position of the sector (12) with respect to the guide in two directions (x,y) which lie in a plane RP perpendicular to the axis H of the guide (17).