Uncured Composite Cutting via Magnetic Groove Guidance
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Solution Overview
Problem
Conventional composite material processing is time-consuming and expensive, particularly due to the need for separate lay-up, curing, and trimming processes, which can be inefficient and costly, especially when dealing with large or complex shapes.
Innovation Solution
A method and tool that utilize a surface with grooves filled with a sacrificial material and magnetic material to guide a cutter, allowing for precise cutting of uncured composite materials without the need for numerically controlled programming, using a self-teaching program to generate cutting paths and reduce processing time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If composite material is laid up directly on a curing tool, then the cycle time includes both curing time and lay-up time, but this increases processing time and expense
Solution Approach 1:
The process is segmented into separate lay-up and curing operations performed on different tools. The lay-up tool is dedicated to placing composite materials while the curing tool is dedicated to curing, allowing parallel processing and eliminating the overlap of operations that would extend cycle time.
Solution Approach 2:
The composite material is laid up in advance on a lay-up tool before being transferred to the curing tool. This preliminary action allows the lay-up operation to be completed and verified before the material enters the curing process, enabling better process control and parallel operation scheduling.
2Manufacturing precision
If numerically controlled lay-up tools are used, then composite material can be laid up to desired shape, but this increases time and expense
Solution Approach 1:
The desired shape and positioning information is pre-programmed into the numerically controlled lay-up tool. This preliminary preparation of toolpaths and parameters allows the actual lay-up operation to proceed automatically with high precision without requiring manual measurement or adjustment during the process.
Solution Approach 2:
Manual or operator-guided positioning is replaced with numerically controlled automated positioning systems. The NCT tool uses programmed coordinates and automated mechanisms to place materials with precise positioning, eliminating the need for manual measurement and reducing both time and human error.
3Manufacturing precision
If conventional trimming is performed after curing, then composite material can be trimmed to final shape, but this adds additional processing steps and time
Solution Approach 1:
The composite material is positioned and shaped during the lay-up process itself rather than being trimmed after curing. Excess material is removed or adjusted while in the uncured state, allowing the final shape to be achieved as part of the lay-up operation rather than as a separate post-processing step.
Solution Approach 2:
The positioning and shaping operations are merged with the lay-up process. The same NCT tool that places the material also performs positioning and preliminary shaping, combining multiple functions into one integrated operation rather than requiring separate trimming equipment and operations after curing.
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 approach enables accurate cutting of uncured composite materials with reduced time and resource investment, achieving near-net shapes with improved efficiency and cost-effectiveness, suitable for large or complex structures like aircraft components.
Implementation Method 1
A cutter having a guide is positioned relative to the uncured composite material, the guide configured to detect the magnetic material
Data Source
AI summary
A method of cutting an uncured composite material is presented. The uncured composite material is positioned onto a surface of a tool and over a groove in the surface, the groove having a groove filler and magnetic material within the groove. A cutter having a guide is positioned relative to the uncured composite material, the guide configured to detect the magnetic material. The uncured composite material is cut above the groove using the cutter as the cutter moves along a path defined by the groove, the cutter guided by the guide detecting the magnetic material in the groove.