Compact Vibration-Damped Tool Chuck for High-Speed Machining
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Solution Overview
Problem
Tool chucks used for high-speed machining tools, such as milling cutters, experience vibrations due to bending and torsional oscillations, which limit machining precision and tool service life, and existing vibration-damped designs are often too long and cumbersome.
Innovation Solution
A compact tool chuck design featuring a vibration-damping component, such as a heavy metal annular disk, strategically placed near the transition between the base body and sleeve section, with a cavity that is short along the axis of rotation, effectively reducing vibrations by acting as a vibration absorber and providing prestress to the sleeve section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If elongated mass elements are incorporated into the tool chuck to reduce vibrations, then vibration damping effect is improved, but the length of the tool chuck increases considerably
Solution Approach 1:
The patent applies local quality by concentrating the vibration-damping function in a specific localized region (the transition area between base body and sleeve section) rather than distributing mass elements along the entire length. The cavity with the vibration-damping component is positioned precisely where the bending axis passes through, creating a localized counterbalance that addresses vibrations without requiring overall lengthening of the tool chuck.
Solution Approach 2:
The patent transitions from the conventional one-dimensional arrangement (elongated mass elements along the axis of rotation) to a three-dimensional solution by creating a cavity with radial and axial dimensions. The vibration-damping component is arranged in a cavity that extends radially from the outer peripheral surface, utilizing spatial volume rather than linear extension to achieve the necessary mass distribution for vibration damping.
2Ease of manufacture
If the cavity is positioned far from the transition between base body and sleeve section, then manufacturing is easier, but vibration damping effectiveness is reduced
Solution Approach 1:
The patent applies preliminary action by positioning the cavity and vibration-damping component in advance at the optimal location (the transition area between base body and sleeve section) where the bending axis passes through. This pre-positioning ensures that the counterbalance effect is maximized from the outset, addressing vibrations effectively while the cavity is formed during the manufacturing process itself.
3Length of moving object
If the sleeve section is made compact in the axial direction, then the tool holder length is reduced, but the vibration damping capability is compromised
Solution Approach 1:
The patent applies the nesting principle by placing the vibration-damping component inside a cavity that is integrated into the sleeve section structure. The cavity begins in the region of the transition from the base body to the sleeve portion and extends along the axis of rotation towards the tool receptacle, with the cavity length being less than 2/5 of the tool holder length. This nested arrangement allows the vibration-damping component to be housed within the compact sleeve section without increasing the overall axial length.
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 compact tool chuck design significantly reduces vibrations, enhancing machining precision and tool service life while maintaining a compact form factor, as the vibration-damping component effectively absorbs and counteracts disturbing vibrations without increasing the tool chuck's length.
Implementation Method 1
A cavity is formed in the tool chuck in which a vibration-damping component is arranged... the vibration-damping component effectively absorbs and counteracts disturbing vibrations
Implementation Method 2
the mass or natural frequency behavior of which improved the overall vibration behavior of the tool chuck
Implementation Method 3
the cavity, and thus the spatial location of the vibration-damping component it houses, is concentrated in the immediate vicinity of the transition from the base body to the sleeve section
Data Source
Figure 1~2
Figure 3~5
Figure 5a~5c
AI summary
A tool chuck (1) for clamping a tool in a machine tool, said tool chuck having a main body (2) and a sleeve part (3) which projects therefrom and forms a tool receptacle (4) for frictionally securing a tool shaft. In the tool chuck is formed a cavity in which a vibration-damping component (7) is provided.