Rectilinear Winding for Composite Rod Inserts
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Solution Overview
Problem
Existing manufacturing techniques for mechanical components with ceramic fibers in a metal matrix are limited in producing components that effectively transmit tensile and compressive loads in one direction, particularly for oblong shapes like rods, which require different properties than circular components.
Innovation Solution
A method involving winding coated filaments in a rectilinear direction to create a composite insert, followed by hot isostatic compaction and machining, to produce mechanical components like rods that can efficiently transmit tensile and compressive loads in one direction, along with a specialized winding device to facilitate this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional circular winding techniques are used, then circular components such as shafts and cylinders can be produced, but oblong components like rods that require directional load transmission cannot be effectively manufactured
Solution Approach 1:
The patent transitions from conventional circular winding to rectilinear winding, adding a dimensional change in the winding pattern. Coated filaments are wound in straight lines parallel to the rod's longitudinal axis rather than in circular patterns, enabling the manufacture of oblong components with optimized directional strength for load transmission.
2Strength
If ceramic fibers are used to provide high strength, then tensile and compressive strength are significantly improved, but the fibers must be coated with metal and embedded in a metal matrix to prevent fiber-to-fiber contact and provide protection
Solution Approach 1:
The patent employs a composite material structure consisting of ceramic fibers coated with metal layers and embedded in a metal matrix. The ceramic fibers (such as silicon carbide) provide high strength, while the metal coating and matrix provide protection and prevent direct fiber-to-fiber contact, creating a synergistic composite that achieves both high strength and structural integrity.
Solution Approach 2:
Different regions of the composite structure have different properties: the ceramic fibers provide high strength in specific directions, the metal coating provides oxidation resistance and protection, and the metal matrix provides ductility and connects the brittle ceramic fibers. Each component serves its specific function locally within the composite structure.
3Weight of moving object
If the mechanical component is designed for minimal mass and size, then weight is reduced, but manufacturing precision and alignment of fibers with load direction must be optimized to maintain strength
Solution Approach 1:
The manufacturing process uses a dynamic winding system where the rectilinear winding can be adjusted in real-time to optimize fiber alignment with the load direction. The winding device can adapt the filament placement to match the principal stress trajectories, ensuring optimal strength-to-weight ratio while maintaining precise fiber orientation.
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 method enables the creation of mechanical components with enhanced strength and directional load transmission capabilities, suitable for aeronautical applications such as undercarriages and turbomachines, while maintaining minimal mass and size.
Implementation Method 1
a step of hot isostatic compaction of the first container
Data Source
AI summary
A method of manufacturing a mechanical component, and winding device to implementing the method. The component includes at least one insert of metal matrix composite, within which matrix ceramic fibers extend, the composite insert obtained from a plurality of coated filaments each including a ceramic fiber coated with a metal sheath. The method manufactures an insert preform by winding a bonded lap or bundle of coated filaments about a cylindrical component. At least some of the winding is performed in at least one rectilinear direction. The method further inserts the insert preform in a first container; performs hot isostatic compaction of the first container; and machines the first container to form a rectilinear insert.