Dual-Sided Vacuum Carrier for Composite Panel Tooling

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Solution Overview

Problem

The manufacturing of composite parts, especially in large applications like aircraft, faces challenges with accuracy and deformation during post-cure processes, leading to increased costs and tooling footprint due to the need for precise positioning and shimming.

Innovation Solution

A flexible dual-sided vacuum plate carrier is used to secure the composite part to a layup mandrel, preventing flexing and deformation by converting the mandrel into a post-cure tool, reducing the need for additional tooling and shimming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual tools and areas are provided for post-cure processes, then the part can be properly positioned for inspection and scanning, but the production area footprint substantially increases

Engineering Contradiction:
Improvepositioning accuracyVSAvoidproduction area footprint
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The layup mandrel is designed to serve multiple functions: it acts as both the forming tool during composite layup and as a positioning tool during post-cure processes such as inspection and scanning. This multi-functionality eliminates the need for separate dedicated tools and areas for post-cure operations, thereby substantially reducing the production area footprint while maintaining positioning accuracy.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Productivity

If the part is removed from the layup mandrel, then the part can be processed further, but the part is subject to flexing and deformation reducing accuracy

Engineering Contradiction:
Improveprocessing continuityVSAvoiddimensional accuracy
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The part remains secured to the layup mandrel through post-cure processes such as inspection and scanning before being removed for further processing. This preliminary positioning action ensures the part maintains its precise dimensional accuracy and orientation during critical post-cure operations, preventing flexing and deformation that would occur if the part were removed earlier.

Inventive Principle:
Principle #10Preliminary action

3Manufacturing precision

If post-cure scanning is used to map surfaces, then the amount of sacrificial shimming can be determined, but additional time and resources are required increasing costs

Engineering Contradiction:
Improvesurface mapping accuracyVSAvoidassembly time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent replaces the traditional mechanical shimming process with a digital scanning and mapping system. The layup mandrel with integrated positioning features enables precise digital mapping of part surfaces, which then guides automated or semi-automated assembly processes. This substitution of mechanical shimming with digital measurement and control reduces both the time required and the resources needed while maintaining or improving surface mapping accuracy.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

4Reliability

If traditional post-cure processes are used, then the part can be inspected, but flexing and deformation occur reducing machining accuracy

Engineering Contradiction:
Improveinspection qualityVSAvoidmachining accuracy
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The inspection process is merged with the positioning system by integrating scanning capabilities directly onto or in conjunction with the layup mandrel. The part remains securely positioned on the mandrel during inspection, and the mandrel's positioning features ensure that the part maintains its precise orientation and location. This merging eliminates the need to remove and reposition the part, thereby preventing flexing and deformation that would compromise machining accuracy.

Inventive Principle:
Principle #5Merging (Combining)

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

This solution enhances the utility of existing tools, reduces the tooling footprint, and achieves greater accuracy in machining by minimizing deformation and shimming, thereby lowering production costs and improving precision.

Implementation Method 1

each vacuum gripper of the set of vacuum grippers connected to a pneumatic system with induction of a vacuum on both sides of the flexible carrier to grip the layup tool and the composite part

Methodology Applied
Scientific EffectVacuum: Vacuum

Data Source

PatentEP3862172B1Composite panel tooling system and method
Publication Date: 2023.06.21 THE BOEING CO
  • EP3862172B1 patent drawingFigure 1
  • EP3862172B1 patent drawingFigure 2
  • EP3862172B1 patent drawingFigure 3

AI summary

A composite panel tooling system (100) includes a forming platform (102) having a contoured surface (104) configured to support a layup of composite material to form a contoured composite part. The system further includes a flexible carrier (110) removably disposed on the contoured surface and comprising a frame, where the frame is configured to receive a set of double-sided vacuum grippers (402) within a set of apertures defined within the frame, and where each double-sided vacuum gripper of the set of double-sided vacuum grippers is configured to connect to a pneumatic system to induce a vacuum on a first side of each vacuum gripper for gripping the contoured surface and on a second side of each vacuum gripper for gripping a surface of the contoured composite part after the contoured composite part has been formed.