Shrink-Fit Chuck Sleeve Structure for Vibration Damping
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Solution Overview
Problem
Clamping chucks used in high-speed cutting operations, such as milling, often experience significant vibration issues due to the rigid clamping of tool shanks, which can lead to adverse torsional and rolling vibrations, affecting machining quality and tool life.
Innovation Solution
A tool-clamping chuck design featuring an inner and outer sleeve, both made of electrically conductive material, joined without play, which reduces vibration transmission through a frictional boundary layer, and an outer sleeve supported axially on the clamping chuck basic body, enhancing damping capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid clamping structure is used to apply high holding forces, then the tool is precisely guided and machining accuracy is improved, but vibration problems increase significantly
Solution Approach 1:
The sleeve portion is divided into an inner sleeve and an outer sleeve that are joined without play. This segmentation creates a boundary layer between the two sleeves that dampens vibrations while maintaining the overall rigid clamping structure necessary for precise tool guidance and high machining accuracy.
Solution Approach 2:
The chuck employs a composite structure with inner and outer sleeves made of different materials or with different properties. This composite construction allows the outer sleeve to provide rigid clamping for precision while the interface between sleeves provides vibration damping, resolving the contradiction between rigidity and vibration resistance.
2Ease of manufacture
If a single-piece sleeve structure is used for simple construction, then manufacturing is easier, but vibration damping capability is reduced
Solution Approach 1:
The sleeve is segmented into inner and outer components that can be manufactured separately and then joined without play. This maintains relative manufacturing simplicity while introducing vibration-damping capability through the boundary layer at the interface between the two sleeves.
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
This configuration significantly reduces damaging vibrations, ensuring precise tool guidance and improved machining quality by applying large clamping forces while effectively damping vibrations.
Implementation Method 1
the inner sleeve and the outer sleeve are in non-releasable contact with each other during normal operation, for example are pressed together
Implementation Method 2
This configuration results in a considerable reduction in the tendency of the tool-clamping chuck for damaging vibrations
Implementation Method 3
The sleeve portion forms a tool-holding fixture for frictionally locking fixing of the tool shank in a press fit by shrink-fitting
Data Source
AI summary
A clamping chuck for clamping tools having a tool shank includes a sleeve portion which is open at its free end, is preferably composed of electrically conductive material and forms a tool-holding fixture for frictionally locking fixing of the tool shank in a press fit by shrink-fitting. The sleeve portion, preferably over an entire axial length of the tool-holding fixture, includes an inner sleeve and an outer sleeve. The outer sleeve receives the inner sleeve in an operationally ready state, is joined thereto without play, and is preferably also composed of an electrically conductive material.