Tool Holder Damping Mounting Body for Vibration and Heat Isolation
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Solution Overview
Problem
Existing damping devices for tool holders, such as boring heads and collet chucks, are ineffective in reducing vibrations caused by cutting forces and machining speeds, especially in tool holders with long lengths and small diameters, due to suboptimal positioning and heat transmission issues that can damage temperature-sensitive damping components.
Innovation Solution
A damping device with a mounting body that adapts to small tool diameters and lengths, featuring a housing with a lubricant conduit and a thermal insulating pad or receptacle to prevent overheating, allowing direct mounting of small diameter tools and maintaining damping effectiveness while protecting sensitive components from heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If damping means is positioned at the end housing of tool holder, then assembly is simplified, but damping effectiveness is reduced for long tool holders with small diameter tools
Solution Approach 1:
The damping device is divided into two main segments: a mounting body that attaches to the tool holder body, and a damping means housed within the mounting body. This segmentation allows the damping means to be positioned optimally near the tool while maintaining simple assembly through the mounting body interface.
Solution Approach 2:
The mounting body acts as an intermediary element between the tool holder and the damping means. It provides a standardized interface for assembly while enabling flexible positioning of the damping means closer to the tool, thus resolving the contradiction between assembly simplicity and damping effectiveness.
2Strength
If tool is mounted by shrinking at the end of long tool holder, then small diameter tools can be secured, but heat is transmitted to temperature-sensitive damping components
Solution Approach 1:
The damping means is extracted from the end housing and relocated to the mounting body, which is positioned away from the tool mounting location. This extraction removes the heat-sensitive damping components from the direct path of heat transmission during shrinking operations.
Solution Approach 2:
The mounting body serves as a thermal intermediary, positioning the damping means at a distance from the heat source (tool mounting area) while still maintaining mechanical connection to the tool holder. This spatial separation protects damping components from excessive heat.
3Reliability
If damping means is positioned close to cutting tool, then vibration suppression is improved, but heat from tool mounting damages damping components
Solution Approach 1:
The device exhibits local quality differentiation: the mounting body is positioned to provide optimal damping near the tool for vibration suppression, while the damping means itself is housed in a location (mounting body) that is thermally protected from the heat source at the tool mounting area.
Solution Approach 2:
The solution resolves the spatial conflict by utilizing the longitudinal dimension of the tool holder. The mounting body is attached to the tool holder body at a position that is both close enough to the tool for effective vibration damping and far enough from the tool mounting end to avoid heat damage.
4Stability of the object's composition
If elastically deformable elements act only on ends of damping member, then retention is achieved, but rigidity adjustment is suboptimal
Solution Approach 1:
The damping member features a conical shape with a greater diameter at one end than at the other. The elastically deformable elements act on the conical surface, distributing forces more effectively across the damping member's generatrix, which improves rigidity adjustment compared to acting only on flat ends.
Solution Approach 2:
The conical geometry of the damping member allows for parameter variation along its length, with the diameter changing from one end to the other. This geometric parameter change enables more effective force distribution and rigidity control when elastically deformable elements act on the conical surface.
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 suppresses vibrations near the cutting tools on tool holders of varying lengths and diameters, ensuring the longevity of damping components by maintaining them away from excessive heat, thus enhancing the operational stability of machine tools.
Implementation Method 1
a thermal insulating pad or receptacle to prevent overheating
Implementation Method 2
at least one means elastically deformable, at least near each end
Implementation Method 3
damping device for tool holders... allowing their rigidity to be adapted to the working conditions
Data Source
Figure 1~4
Figure 5~7
AI summary
The holder (1) has a damping device (2) that is housed in a mounting body (3), where the mounting body is equipped with a lubricant supply duct. A front end of the supply duct is provided with a mounting nozzle (4), where another end of the duct is connected to a circular lubricant supply groove provided on a front face of the holder. The mounting body includes a receiving housing for receiving the damping device, where the mounting body is in a form of receptacle with a thin thickness wall.