Plastic Damping Plates for Versatile Chatter Suppression
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Solution Overview
Problem
Conventional damping apparatuses are limited in their ability to effectively suppress chatter vibration on workpieces with non-cylindrical shapes and long cylindrical workpieces, as they are specifically designed for hollow cylindrical shapes and lack versatility.
Innovation Solution
A damping apparatus comprising a plurality of damping plates with plasticity, held by a holding member to allow deflection, and a contact member that can be brought into contact with the workpiece to propagate vibration and absorb it through friction, supported by a mechanism that can be positioned and adjusted for optimal vibration suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a damping apparatus is designed specifically for hollow cylindrical shapes, then it can effectively suppress chatter vibration on cylindrical workpieces, but it cannot be applied to workpieces with non-cylindrical shapes, reducing versatility
Solution Approach 1:
The damping apparatus is designed with a universal structure that can adapt to different workpiece shapes. The holding member can clamp various shapes (cylindrical, rectangular, irregular), and the contact member can be positioned at optimal locations regardless of geometry. This multi-functional design allows the same apparatus to effectively damp vibrations on diverse workpiece types without requiring shape-specific configurations.
2Stability of the object's composition
If clamping means are used to clamp the end portion of a long workpiece, then the workpiece can be secured, but the non-clamped end has high degree of freedom, allowing self-excited vibration to occur
Solution Approach 1:
The damping apparatus acts as an intermediary element between the workpiece and the vibration suppression system. The contact member touches the workpiece surface at optimal positions to directly damp vibrations, while the holding member provides clamping force. This dual-function design allows the apparatus to both secure the workpiece and suppress vibrations at the unclamped end simultaneously.
3Reliability
If multiple damping apparatuses are disposed on a long workpiece to suppress vibration, then vibration suppression improves, but the complexity of positioning and adjusting each apparatus increases
Solution Approach 1:
The damping apparatus incorporates dynamic adjustment capabilities through movable contact members and adjustable holding members. The contact member can be positioned at optimal locations along the workpiece length, and the holding member can be adjusted to provide appropriate clamping force. This dynamic adjustability allows a single apparatus to effectively handle multiple vibration modes on long workpieces, reducing the need for multiple fixed apparatuses and simplifying the overall system.
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 apparatus effectively dampens vibrations on workpieces of various shapes by converting vibration energy into heat through friction between the damping plates, allowing for versatile application and improved vibration suppression on both cylindrical and non-cylindrical workpieces.
Implementation Method 1
friction between the damping plates caused by the vibration of the damping plates absorbs the propagated vibration energy
Data Source
AI summary
A damping apparatus includes a damping unit 30 composed of a plurality of damping plates 36 having plasticity, a holding member 31 holding at least one ends of the damping plates 36 in a manner to allow deflection of the damping plates 36 with the damping plates 36 laminated together, and a contact member 33 provided at a position spaced from a holding position of the holding member 31, and attached to an outermost one of the damping plates 36, or extending through and held by the damping plates 36 in such a manner that it can be brought into contact with the outermost one of the damping plates 36 and can be moved in an extending direction thereof. The damping unit 30 is supported by a support mechanism 2 in such a manner that the contact member 33 can be brought into contact with an object W.