Reconfigurable Composite Tool Shaping With Vacuum-Tight Surfaces
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Solution Overview
Problem
Existing morphable tools and mandrels for manufacturing composite structures are either soft and flexible, lacking vacuum tightness, or rigid but with surface discontinuities that compromise vacuum integrity.
Innovation Solution
A method involving localized heating and mechanical manipulation of a rigid, impermeable tool to reconfigure its shape, allowing for vacuum-tight formation of composite structures with varying contours using a shaping machine and automated shaping members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing tools are made from soft and flexible materials to allow morphing, then adaptability is improved, but vacuum tightness deteriorates
Solution Approach 1:
The tool's physical state is changed through localized heating, transitioning from a rigid state to a compliant state that allows morphing. This parameter change enables the tool to achieve adaptability only when needed, while maintaining vacuum tightness in its default rigid state.
Solution Approach 2:
The tool transitions from a static rigid structure to a dynamic structure that can change its shape and compliance characteristics. By incorporating heating elements and control systems, the tool can dynamically adjust its properties to enable morphing while maintaining vacuum integrity through active control.
2Reliability
If existing rigid tools are used, then vacuum tightness is improved, but adaptability deteriorates due to lack of flexibility
Solution Approach 1:
The tool's rigidity parameter is dynamically changed through localized heating. When heating is applied to specific regions, those areas become compliant enough to allow contour variation, while unheated regions maintain their rigid, vacuum-tight properties.
Solution Approach 2:
Different regions of the tool have different properties - heated regions become compliant for shaping, while unheated regions remain rigid for maintaining vacuum integrity. This local differentiation allows the tool to simultaneously achieve adaptability where needed and vacuum tightness where required.
3Adaptability or versatility
If existing morphable tools are made completely flexible, then adaptability is improved, but manufacturing precision deteriorates
Solution Approach 1:
The tool's stiffness parameter is selectively changed through controlled heating. By applying heat only to specific regions and controlling the temperature and duration, the tool achieves sufficient compliance for shaping while maintaining overall structural rigidity for precision.
Solution Approach 2:
The tool provides dynamic control over its compliance characteristics, allowing it to be flexible only when and where needed for shaping operations, while maintaining rigidity elsewhere to ensure manufacturing precision and geometry accuracy.
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
Enables the formation of composite structures with precise geometries while maintaining vacuum integrity, facilitating efficient and accurate manufacturing processes.
Implementation Method 1
localized heating a portion of the tool to yield a heated portion of the tool
Data Source
AI summary
A method for configuring a shape of a tool from an initial shape to a reconfigured shape includes localized heating a portion of the tool to yield a heated portion of the tool and mechanically manipulating the heated portion of the tool to achieve the reconfigured shape.