Exterior Vehicle Part Assembly Using Global Datum Alignment
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Solution Overview
Problem
Traditional vehicle assembly methods face inefficiencies and challenges in automating the precise alignment and attachment of exterior vehicle components due to material variety, precise alignment needs, and the requirement for durable attachment methods, leading to potential errors and inconsistencies in fit and finish.
Innovation Solution
Utilizing a global datum as a universal reference point for positioning exterior vehicle parts within an automated assembly cell, coupled with advanced adhesive technologies like structural adhesives and tacking solutions, to ensure precise and repeatable placement of components, decoupling underlying structure tolerances, and enabling automation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional welding and manual assembly methods are used for exterior vehicle parts, then flexibility in handling various materials and complex geometries is maintained, but manufacturing precision and consistency deteriorate due to compounding errors and difficulty in automation
Solution Approach 1:
The patent introduces a global datum system as an intermediary reference framework that mediates between the vehicle body and exterior parts. This datum system provides a stable, automated reference for positioning, enabling robotic systems to achieve precise alignment without being constrained by the complexity of manual methods or the tolerances of the underlying structure.
Solution Approach 2:
The patent replaces traditional mechanical alignment methods (manual measurement, physical fixtures) with an automated vision and positioning system that references the global datum. This substitution enables consistent, high-precision alignment while facilitating full automation of the assembly process.
2Device complexity
If traditional fasteners and clips are used for attaching exterior parts, then mechanical strength and durability are ensured, but device complexity and serviceability deteriorate due to numerous discrete joining parts
Solution Approach 1:
The patent merges multiple discrete joining functions (alignment, positioning, attachment) into a single integrated adhesive bonding process. The global datum system ensures precise alignment, while structural adhesives provide both attachment and sealing functions, eliminating the need for separate fasteners, clips, and gaskets.
Solution Approach 2:
The patent changes the fundamental attachment parameter from mechanical (fasteners, clips) to chemical (adhesive bonding). This parameter change reduces the number of parts while maintaining or improving attachment durability, as structural adhesives provide continuous bonding and stress distribution across the entire joint surface.
3Productivity
If the entire vehicle is moved for assembly operations, then all components are accessible for assembly, but productivity and energy efficiency deteriorate due to handling the full vehicle weight and footprint
Solution Approach 1:
The patent segments the assembly process into two stages: first, the vehicle body is assembled to the global datum in the body assembly area; second, exterior parts are brought to the body in automated exterior part assembly areas. This segmentation eliminates the need to move the entire vehicle, improving productivity by reducing handling weight and enabling specialized automated assembly cells.
Data Source
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AI summary
The present disclosure relates to an automated system and method for assembling exterior vehicle parts to a vehicle assembly structure. The system utilizes an automated assembly cell with fixtures corresponding to each exterior vehicle part and references a global datum for precise alignment. Exterior vehicle parts are secured to fixtures using vacuum clamps or other means, and a structural adhesive is applied to either the part or a part-receiving location on the vehicle assembly structure. The parts are then moved into their nominal positions relative to the global datum, thereby compressing the adhesive and completing the installation. The method improves assembly efficiency by compensating for substructure irregularities with an engineered adhesive gap and allows for continued assembly during adhesive curing through tacking operations. This technology streamlines the vehicle assembly process, enhances quality, and increases production rates by reducing manual labor and potential for error.