Anti-Vibration Tool Holder With Tunable Suspended Mass
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Solution Overview
Problem
Existing anti-vibration arrangements for tool holders during metal cutting operations, such as those using spring-mass systems with elastic supporting members, are limited in effectively suppressing vibrations, particularly in providing a versatile and efficient solution for various types of vibrations.
Innovation Solution
A tool holder with an anti-vibration arrangement featuring an elongated vibration absorbing mass and at least three non-torus shaped, resilient suspension members that are adjustable and elastically deformable, allowing for secure suspension within an interior cavity, thereby forming an oscillating space to reduce or eliminate vibrations without the need for viscous fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional elastic supporting members (annular structures or spherical bodies) are used in anti-vibration arrangements, then the structure is simple and easy to manufacture, but the vibration suppression effectiveness is limited and not versatile for various types of vibrations
Solution Approach 1:
The vibration absorbing mass is segmented into multiple sections with different densities arranged in sequence along the longitudinal axis. This segmentation allows the anti-vibration arrangement to handle different types of vibrations (lateral and torsional) more effectively, resolving the contradiction by improving vibration suppression through structural division rather than using a single simple elastic member
Solution Approach 2:
The suspension members are designed as resilient elements that can dynamically adapt to different vibration frequencies and types. The combination of segmented mass with resilient suspension members creates a dynamic system that can respond to various vibration conditions, improving versatility while maintaining reasonable structural complexity
Solution Approach 3:
The vibration absorbing mass uses composite structure with multiple materials of different densities (such as tungsten and stainless steel) arranged in segments. This composite approach enhances the anti-vibration performance for different vibration types while keeping the overall design practical and manufacturable
2Adaptability or versatility
If a vibration absorbing mass with complex segmented structure is used, then vibration suppression for various vibration types is improved, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The vibration absorbing mass is divided into multiple separable segments that can be manufactured independently and then assembled into the cavity. This segmentation improves versatility for different vibration types while facilitating easier manufacturing and assembly compared to a single complex piece
Solution Approach 2:
The segmented vibration absorbing mass design serves multiple functions: it can suppress both lateral and torsional vibrations, and the segments can be configured in different arrangements to address specific vibration problems. This multi-functionality achieves versatility without proportionally increasing manufacturing complexity
3Reliability
If viscous fluid is used in the cavity to dampen vibrations, then vibration suppression is enhanced, but the device complexity increases and fluid leakage becomes a concern
Solution Approach 1:
The viscous fluid is extracted/removed from the anti-vibration arrangement entirely. Instead, the patent uses a dry friction-based damping mechanism through the interaction between the segmented vibration absorbing mass and the cavity wall, eliminating the need for fluid containment systems while maintaining effective vibration suppression
Solution Approach 2:
The fluid-based damping system is replaced with a mechanical friction-based damping system. The segmented mass segments interact mechanically with the cavity wall through controlled friction, providing vibration suppression without requiring viscous fluids or complex fluid containment mechanisms
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 solution effectively reduces or eliminates vibrations in cutting tools by matching the vibration frequency of the vibration absorbing mass with the natural frequency of the cutting tool, providing a tunable and efficient anti-vibration mechanism suitable for both lateral and torsional vibrations, with the ability to adjust without disassembling parts.
Implementation Method 1
The at least three suspension members can be under compressive elastic deformation by contact against the inwardly facing cavity wall surface and the respective mass recess.
Implementation Method 2
a vibration absorbing mass having a mass central axis and comprising two axially opposite mass ends and at least three mass recesses
Implementation Method 3
The solution effectively reduces or eliminates vibrations in cutting tools by matching the vibration frequency of the vibration absorbing mass with the natural frequency of the cutting tool
Data Source
AI summary
An elongated tool holder includes a tool anti-vibration component having a mass housing portion and an anti-vibration arrangement. The anti-vibration arrangement includes an enclosed interior holder cavity formed in the mass housing portion. The anti-vibration arrangement also includes a vibration absorbing mass disposed within the holder cavity and elastically suspended therein by at least three non-torus shaped, resilient suspension members contacting an inwardly facing cavity wall surface. A cutting tool is provided with the tool holder.