Wireless Torsional Vibration Tool for Large-Diameter Machining
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Solution Overview
Problem
Tools with large diameters are not effectively usable in vibratory operations due to their size and weight, causing significant repercussions on the machine during vibration mode.
Innovation Solution
A tool with a machine connection, a tool head having defined cutting edges, a vibration unit for rotational vibration, and an energy receiving device for wireless energy supply, designed to minimize the impact of vibration drive on the machine, utilizing torsional vibration with diameter-dependent amplitudes and resonance effects to enhance amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If tools with large diameters are used in vibratory operation, then the tool can handle larger workpieces and provide geometric translation at large circumference, but the tool size and weight cause strong repercussions on the machine
Solution Approach 1:
The patent applies torsional vibration to the tool shaft to enable large-diameter tools to be used in vibratory operation. The vibration unit generates controlled torsional vibrations that allow the tool to effectively engage the workpiece while the vibration isolates harmful repercussions from the machine structure. This enables tools with diameters greater than 20 mm to operate effectively without causing strong machine repercussions.
Solution Approach 2:
The patent introduces a vibration unit as an intermediary device between the drive system and the tool. This vibration unit generates and controls the torsional vibrations, acting as a mediator that enables the large-diameter tool to operate while minimizing the transmission of harmful vibrations to the machine structure. The vibration unit serves as the intermediate element that reconciles the conflict between tool size and machine stability.
2Force
If strong vibration drive is applied to achieve sufficient vibration amplitude, then the machining effectiveness improves, but the repercussions on the machine become stronger
Solution Approach 1:
The patent uses torsional vibration to achieve effective vibration amplitudes at the tool cutting edges while the vibration is localized to the tool shaft and does not strongly propagate to the machine structure. The torsional vibration mode allows the vibration energy to be concentrated where needed (at the cutting edges) while minimizing harmful repercussions on the machine.
Solution Approach 2:
The patent creates local vibration quality by generating torsional vibrations that are concentrated at the tool shaft and cutting edges, while the machine connection and supporting structure experience minimal vibration. The vibration characteristics are optimized locally at the tool level without strongly affecting the overall machine structure, allowing strong local vibration effects without strong global repercussions.
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 allows for the use of tools with large diameters in vibration mode with minimal repercussions on the machine, maintaining acceptable torsional vibration amplitudes and optimizing tool performance by positioning the tool head and vibration unit to align with resonance nodes and antinodes.
Implementation Method 1
an energy receiving device for receiving energy supplied wirelessly and supplying electrical energy to the vibration unit
Implementation Method 2
a vibration unit which is designed to set the tool head in a rotational vibration about the axis of rotation
Implementation Method 3
The torsional vibration shows diameter-dependent amplitudes. In the case of large diameters, the disadvantage of small amplitudes is compensated to some extent by the geometric translation at the large circumference. The amplitude can be increased further by utilizing resonance effects in a specific way.
Implementation Method 4
The machining is effected by a relative movement between the tool, in particular the cutting edge thereof, and the workpiece (cutting movement). It takes place with a certain removal rate with a certain tool wear
Data Source
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AI summary
A tool (20) has a machine-side machine connection (21) for connecting the tool to a machine tool (1) for driving the tool in rotation (27) about a rotation axis (29) and for advancing (26) the tool relative to a workpiece, a workpiece-side tool head (22) having one or more cutting edges (25) for machining a workpiece, wherein the diameter (D) of the tool head is greater than 20 mm and wherein the cutting edges (25) of the tool (20) are arranged such that they travel over an area perpendicular to the rotation axis (29), a vibration unit (23) which is designed to set the tool head into rotary vibration (28) about the rotation axis (29), and an energy reception device (24) for receiving wirelessly supplied energy and for supplying electrical energy to the vibration unit (23).