Damped Rotating Tool Holder With Through-Tube Joint Structure
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Solution Overview
Problem
Conventional grinding processes suffer from low material removal rates and inadequate damping of vibrations in high-performance grinding, leading to unsatisfactory results and potential tool damage due to imbalances in rotating tools.
Innovation Solution
A holder for rotating tools featuring a modular design with a hollow cylindrical base and a through-tube clamped against the base, incorporating damping elements and a coolant system, which dissipates energy at joints and provides high stiffness and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damping element is provided inside the holder base body, then vibrations are dampened to some extent, but the damping effect is insufficient for high-performance grinding vibrations
Solution Approach 1:
The holder is divided into multiple segments: a hollow cylindrical base body, a through-tube arranged at a distance from the cylindrical shell, and multiple damping elements positioned between them. This segmentation creates multiple damping interfaces that collectively address the insufficient damping effect of a single damping element design.
Solution Approach 2:
The through-tube acts as an intermediary element arranged in the cavity of the holder base body at a distance from the cylindrical shell. Damping elements are positioned between the through-tube and the cylindrical shell, creating an intermediate damping structure that effectively mitigates high-performance grinding vibrations without direct contact between the through-tube and the shell.
2Device complexity
If a one-piece receiving base design is used, then the structure is simple, but weight reduction and damping characteristics are limited
Solution Approach 1:
The receiving base is transformed from a one-piece design to a segmented structure with a hollow cylindrical base body and a separate through-tube arranged within its cavity. This segmentation reduces material usage and holder weight while creating damping interfaces between components.
Solution Approach 2:
The hollow cylindrical base body design creates an inherent porous-like structure with the through-tube arranged within its cavity. This internal cavity structure reduces weight while providing space for damping elements that improve damping characteristics without compromising structural integrity.
3Length of moving object
If the holder is designed for high-performance grinding with long rigid structure, then deep and difficult-to-access surfaces can be machined, but vibrations from imbalances lead to unsatisfactory results and potential tool damage
Solution Approach 1:
The long rigid holder structure is segmented into a hollow cylindrical base body and a through-tube arranged within the cavity. This segmentation reduces the holder's overall mass and moment of inertia, thereby reducing vibrations caused by imbalances during high-performance grinding operations while maintaining the necessary length for accessing deep surfaces.
Solution Approach 2:
The holder employs a composite structure with the through-tube arranged in the cavity of the hollow cylindrical base body, creating a multi-component system. This composite design provides both the necessary rigidity for long holders and reduced mass for vibration mitigation, achieving a balance between structural requirements and vibration control.
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 achieves improved damping characteristics, increased stiffness, and effective coolant distribution, reducing vibrations and enhancing the grinding process efficiency while minimizing tool damage.
Implementation Method 1
energy is dissipated at joints or at the interfaces between components
Implementation Method 2
the resulting joints, cause a damping effect, which is known as joint damping, because energy is dissipated at joints
Implementation Method 3
the through-pipe or coolant pipe can thus convey coolant from one end of the mounting base
Implementation Method 4
Coolant can be guided from the work spindle-side interface to the grinding wheel support via an internal channel
Data Source
Figure 1
Figure 1a
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AI summary
The invention relates to a holder for rotating tools. The holder has a rotationally symmetrical, hollow cylindrical base body. A through-tube, in particular clamped against the base body, is arranged in the cavity of the base body, spaced apart from the cylindrical surface of the (hollow cylindrical) base body.