Modular Blade Flexure Assembly for Replaceable Precision Blades
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Solution Overview
Problem
Existing blade flexure assemblies are limited by machining tolerances and surface finishes, leading to variability in performance and strength, and are often permanently assembled, making it difficult to accommodate design changes without fabricating new assemblies.
Innovation Solution
A modular blade flexure assembly design featuring removable flexure blades with distinct curved sections, clamping blocks with different curvatures, and fasteners that allow for adjustable positioning and replacement of blades, mimicking the performance of monolithic assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If monolithic fabrication or brazing is used, then the device achieves permanent assembly and structural integrity, but it prevents replacement of flexure blades and requires new fabrication for design changes
Solution Approach 1:
The device is divided into separate modular components: mounting structures, flexure blades, and clamping blocks. This segmentation allows individual replacement of flexure blades while maintaining the overall assembly, resolving the contradiction between permanent assembly stability and replacement capability.
Solution Approach 2:
The clamping blocks provide a dynamic, adjustable connection between mounting structures and flexure blades. The clamping force can be applied or released to enable installation or removal, transforming the connection from static (permanent) to dynamic (reversible), thus allowing both stable assembly and easy replacement.
2Stability of the object's composition
If monolithic fabrication is used, then the device achieves continuous structure, but machining tolerances and surface finishes limit repeatability and accuracy
Solution Approach 1:
By segmenting the device into separate components (mounting structures, flexure blades, clamping blocks), each component can be manufactured with tighter tolerances independently. The modular assembly allows for better control of manufacturing precision compared to monolithic fabrication, where errors accumulate across the entire continuous structure.
Solution Approach 2:
The design allows changing geometric parameters of individual components (such as blade curvature, thickness, or clamping force) without redesigning the entire assembly. This enables optimization of manufacturing precision for each component separately and facilitates adjustments to achieve desired repeatability and accuracy.
3Stability of the object's composition
If subtractive or additive manufacturing is used for monolithic fabrication, then the device achieves integrated structure, but it prevents use of more applicable materials for intermediate blades
Solution Approach 1:
The intermediate flexure blades are segmented as separate replaceable components rather than being integrated into a monolithic structure. This allows selection of different materials for different components based on their specific functional requirements, such as using high-strength alloys for blades while using other materials for mounting structures or clamping blocks.
Solution Approach 2:
The modular design enables the use of composite material systems where different components are made from different materials optimized for their specific functions. For example, flexure blades can be made from materials with specific fatigue properties while mounting structures use materials optimized for rigidity, creating a composite assembly with superior overall performance.
4Strength
If brazed assembly is used, then the device achieves permanent connection, but it prevents removal and replacement of intermediate blades
Solution Approach 1:
The connection between mounting structures and flexure blades is made dynamic through the clamping block mechanism. The clamping force provides sufficient connection strength during operation, but can be easily released to allow removal and replacement of blades, eliminating the need for permanent brazed connections.
Solution Approach 2:
Clamping blocks serve as intermediary components between mounting structures and flexure blades. These intermediaries provide the connection function during operation while enabling easy disassembly when replacement is needed, acting as a mediator between the need for strong connection and the need for ease of repair.
Data Source
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AI summary
A blade flexure assembly that includes first and second mounting structures. Two or more flexure blades are connected to and extend between the first and second mounting structures. Clamping blocks clamp the flexure blades to the mounting structures. The modular design of the assembly provides for replacing one or more of the flexure blades to adjust one or more functional aspects of the assembly.