Metal Fiber Cushion Member for Low-Distortion Alignment
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Solution Overview
Problem
Devices with asymmetric structures face challenges in maintaining symmetry due to the large repulsive force and minute distortion caused by conventional cushion members like metal plate springs and washers, which are difficult to design and install without causing misalignment.
Innovation Solution
A non-woven fabric cushion member made from entangled metal fibers with specific compressive deformation ratios and space factors, allowing for compressive deformation without significant repulsive force, thereby minimizing distortion and eliminating the need for accommodation grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional cushion members (metal plate springs, washers) are used, then they can maintain parallelism of compressive members, but they generate large repulsive forces and cause minute distortion due to asymmetric structures
Solution Approach 1:
The invention changes the material parameters from conventional metal plate springs to a specific foam material with controlled compressive deformation characteristics (5-80% deformation ratio at 1 MPa load). This parameter change reduces the repulsive force while maintaining the parallelism maintenance function, as the foam material deforms more compliantly under load compared to rigid metal springs.
Solution Approach 2:
The invention uses a composite structure combining a foam material core with outer metal plates. The foam material provides compliant cushioning with reduced repulsive force, while the metal plates maintain structural integrity. This composite approach resolves the contradiction by allowing the inner foam layer to deform and reduce repulsive force while the outer metal layers maintain parallelism.
2Strength
If conventional cushion members (metal plate springs, washers) are used, then they can support compressive loads, but they cause minute distortion between members due to asymmetric device structures
Solution Approach 1:
The invention changes the material from rigid metal to compliant foam with specific deformation characteristics. The foam material's ability to deform 5-80% under 1 MPa load allows it to accommodate asymmetric structures without transmitting distortion, thereby improving alignment precision while maintaining compressive load support capability through the foam's inherent strength and the outer metal plate reinforcement.
3Adaptability or versatility
If asymmetric device structures are used, then design flexibility is improved, but it becomes difficult to maintain symmetry and causes distortion with conventional cushion members
Solution Approach 1:
The invention uses foam material with controlled compressive deformation parameters (5-80% at 1 MPa) that allows the cushion member to adapt to asymmetric device structures. The foam's compliant nature enables it to deform and conform to asymmetric geometries while maintaining functional parallelism, thus supporting design flexibility without sacrificing symmetry maintenance.
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 cushion member effectively reduces distortion between members by compressively deforming under load, restoring shape over time, and providing excellent cushioning properties without generating repulsive forces, thus ensuring precise alignment and stability in asymmetric devices.
Implementation Method 1
when the cushion member is compressed, the cushion member undergoes compressive deformation and the following compressive deformation ratio is 5% to 80%: Compressive deformation ratio = (T0-T1)/T0×100
Implementation Method 2
after the load is restored, the following restoration ratio at 72 hours after release of the load is 15% to 100%: Restoration ratio = (T2-T1)/(T0-T1)×100
Data Source
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Figure 5
AI summary
The present invention provides a cushion member and a stage member provided with the cushion member, the cushion member including a non-woven fabric formed by binding or entangling metal fibers, wherein when the cushion member is compressed, the cushion member undergoes compressive deformation and the following compressive deformation ratio is 5% to 80%: Compressivedeformationratio=T0−T1/T0×100, T0: film thickness of cushion member before application of load, and T1: film thickness of cushion member after application and release of load.