Robotic Laminator with Sensor-Guided Cutting for Composite Layup
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Solution Overview
Problem
Conventional automated tape lamination machines face challenges in accurately placing plies on contoured surfaces without wrinkles or excessive overlap, leading to reduced lay-down rates and structural integrity issues due to the rigidity of unidirectional tape and the need for narrower course materials.
Innovation Solution
A system comprising a robotic vehicle, end effector, sensor, and cutting system that generates a partial vacuum to advance ply material along a layup form, senses the edge of previously applied courses, and cuts profiles to maintain tight tolerances and prevent overlap, allowing for precise placement and increased lay-down rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If narrower course material is used to prevent overlap and divergence on contoured items, then manufacturing precision is improved, but productivity deteriorates due to reduced lay-down rates
Solution Approach 1:
The system performs preliminary cutting of the course material into precise segments before application. The cutting device trims the edges of the course material in advance, ensuring that when the material is applied to the contoured form, it fits precisely without overlap or divergence, thereby maintaining high precision while allowing the use of wider course material that improves lay-down rate
Solution Approach 2:
The sensor system provides real-time feedback on the position and alignment of the course material during application. This feedback loop allows the control system to adjust the cutting parameters and application positioning dynamically, ensuring precise course placement even on contoured surfaces, thus resolving the contradiction between precision and productivity
2Manufacturing precision
If force is applied to deviate from the natural path of course material, then course alignment on contoured surfaces is improved, but the material develops wrinkles or bridges due to exceeding flexing capacity
Solution Approach 1:
The system changes the physical parameters of the course material by pre-cutting it into specific segments with controlled dimensions. This parameter modification allows the material to conform to contoured surfaces without excessive force, preventing wrinkles and bridges while maintaining precise alignment through the cutting device that trims material to exact fit dimensions
Solution Approach 2:
The course material is segmented into smaller sections through the cutting device before application. This segmentation reduces the overall flexibility requirement for each segment, allowing them to be applied to contoured surfaces with minimal force, thereby preventing wrinkles and bridges while maintaining precise alignment through controlled segment placement
3Productivity
If wider course material is used to increase lay-down rate, then productivity is improved, but manufacturing precision deteriorates due to increased tendency to wrinkle and diverge
Solution Approach 1:
The cutting device performs preliminary trimming of wider course material to precise dimensions before application. This preliminary action allows the use of wider course material for higher lay-down rates while ensuring that each segment is precisely sized to fit the contoured surface without divergence or overlap, thus maintaining manufacturing precision
Solution Approach 2:
The system replaces manual or conventional mechanical alignment methods with an automated sensor-based positioning system. The sensor detects the position of the course material and the cutting device adjusts accordingly, providing precise control over material placement even when wider course material is used, thereby maintaining precision while improving productivity
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
The system enables accurate and efficient placement of plies with reduced voids and increased structural integrity by maintaining tight tolerances and minimizing wrinkles, enhancing the fabrication of composite items, particularly in aerospace applications.
Implementation Method 1
A partial vacuum is generated between a ply material and a layup form
Data Source
AI summary
A system to fabricate a composite item includes an end effector, robotic vehicle, sensor, and cutting system. The end effector applies a course to a layup form. The robotic vehicle positions the end effector. The sensor senses an edge of a previously applied course. The cutting system cuts a profile on the course in response to the sensed edge.