Auxetic Vibration-Absorbing Base for Thin-Wall Milling Accuracy
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Solution Overview
Problem
Existing milling devices for thin-walled parts suffer from complex structures and high energy consumption due to magnetorheological fluids and coils, leading to increased costs and reduced machining accuracy and efficiency.
Innovation Solution
A negative Poisson's ratio vibration absorbing base with integrated shape memory alloy components, including negative Poisson's ratio structures and bending beams, which absorb vibration energy without additional energy consumption, utilizing metal 3D printing for customization and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetorheological fluid, permanent magnets, and coils are used for vibration reduction, then vibration reduction performance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and removes the complex magnetorheological fluid system, permanent magnets, and coils from the vibration reduction device. Instead, it uses a simple rubber material layer that inherently provides vibration damping through its viscoelastic properties, eliminating the need for complex electromagnetic components while maintaining effective vibration reduction performance.
Solution Approach 2:
The patent replaces expensive, complex electromagnetic components with inexpensive rubber material that can be easily manufactured and replaced. The rubber layer provides sufficient vibration damping functionality without requiring costly magnets, coils, or magnetorheological fluids, making the device more economical and easier to manufacture.
2Reliability
If magnetorheological fluid and coils are used for vibration reduction, then vibration control is improved, but energy consumption increases
Solution Approach 1:
The rubber material layer provides passive vibration damping without requiring external energy input. It automatically absorbs and dissipates vibration energy through its inherent viscoelastic properties, eliminating the need for powered coils or magnetorheological fluid systems that consume electrical energy. The system serves itself by converting mechanical vibration energy into heat through internal friction within the rubber material.
3Reliability
If complex vibration reduction devices are used, then vibration reduction performance is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive electromagnetic components with inexpensive rubber material that can be easily manufactured through simple molding or adhesive bonding processes. The rubber layer provides sufficient vibration damping functionality without requiring costly magnets, coils, or magnetorheological fluids, making the device more economical and easier to manufacture.
Solution Approach 2:
The patent extracts and removes the complex magnetorheological fluid system, permanent magnets, and coils from the vibration reduction device. Instead, it uses a simple rubber material layer that inherently provides vibration damping through its viscoelastic properties, eliminating the need for complex electromagnetic components while maintaining effective vibration reduction performance.
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 base achieves effective vibration reduction, ensuring high machining accuracy and surface quality while reducing manufacturing and operational costs, with a simple structure that adapts to various thin-walled part types.
Implementation Method 1
Both the bending beams and the negative Poisson's ratio structure are made of shape memory alloy materials
Implementation Method 2
Each of the multiple vibration reducing units includes a negative Poisson's ratio structure
Data Source
AI summary
A negative Poisson's ratio vibration absorbing base and milling device for milling thin-walled parts are provided. The base comprises a bottom plate and a workpiece supporting plate. Vibration reducing units are provided between the bottom plate and the workpiece supporting plate. Each of the vibration reducing units comprises a negative Poisson's ratio structure. The negative Poisson's ratio structure is fixed on a first vertical plate. Top end of the first vertical plate is fixed to the workpiece supporting plate, and bottom end of the first vertical plate is fixed to the bottom plate. Both sides of the first vertical plate above the negative Poisson's ratio structure are provided with bending beams. One end of a bending beam of the bending beams is connected to the first vertical plate, and an other end of the bending beam is connected to the second vertical plate fixed on the bottom plate.