Vibrating Handpiece Tool Frequency Control for Heat Reduction
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Solution Overview
Problem
Handpiece-type high-frequency vibration apparatuses generate excessive heat when the tool frequency is tuned to its resonance frequency, affecting cutting ease and time.
Innovation Solution
A method that adjusts the tool frequency by adding a predetermined frequency to the resonance frequency in a non-contact state and adjusts the resonance frequency to match the added frequency during cutting, reducing heat generation and enhancing cutting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the frequency of the tool is tuned to the resonance frequency of the tool, then cutting efficiency is improved, but heat generation of the tool becomes high
Solution Approach 1:
The patent applies dynamics by making the vibration frequency adjustable rather than fixed at resonance. The control unit dynamically changes the vibration frequency based on operational conditions, allowing the system to operate at added frequencies during non-contact states to reduce heat while maintaining cutting efficiency when contact is made. This transforms a static resonance-based system into a dynamic frequency-controlled system.
Solution Approach 2:
The patent changes the frequency parameter from a fixed resonance frequency to a variable frequency that can be set to resonance frequency or added frequency (resonance frequency + predetermined frequency). This parameter change allows the system to optimize between heat reduction and cutting efficiency by selecting appropriate frequency values based on operational requirements.
2Power
If the frequency of the tool is tuned to the resonance frequency of the tool, then cutting energy is high, but heat generation increases excessively
Solution Approach 1:
The patent implements periodic action by alternating between non-contact states (where added frequency is used to reduce heat) and contact states (where resonance frequency provides cutting energy). The control unit periodically adjusts the frequency based on the contact state, creating a rhythmic pattern of frequency adjustment that manages heat generation while maintaining cutting capability.
Solution Approach 2:
The patent applies preliminary anti-action by using added frequency during non-contact states to prevent excessive heat generation before cutting begins. This preliminary frequency adjustment counteracts the potential heat problem before it occurs, allowing the system to then switch to resonance frequency for cutting without carrying over excessive heat conditions.
3Temperature
If the vibration frequency is adjusted to reduce heat, then heat generation is suppressed, but cutting facilitation may be reduced
Solution Approach 1:
The patent uses feedback by having the control unit monitor the contact state between the tool and object, then automatically adjusting the vibration frequency accordingly. When contact is detected, the system switches to resonance frequency to facilitate cutting; when no contact is present, it uses added frequency to reduce heat. This closed-loop feedback ensures both heat suppression and cutting facilitation are achieved at appropriate times.
Solution Approach 2:
The system dynamically adapts the vibration frequency based on real-time operational conditions. The control unit continuously adjusts the frequency parameter to match the current state (contact or non-contact), ensuring optimal performance for each condition. This dynamic adjustment resolves the contradiction by making the frequency responsive to actual cutting needs rather than fixed.
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 approach reduces tool heat and improves cutting efficiency by optimizing the tool's vibration frequency, allowing for effective cutting with reduced energy consumption and minimal tissue damage.
Implementation Method 1
a handpiece including a vibrating body that ultrasonically vibrates
Implementation Method 2
the frequency of the tool is tuned to a resonance frequency of the tool
Implementation Method 3
driving the vibrating body, in a cutting state of cutting the object by the tool, such that the resonance frequency of the tool in the cutting state increases and approaches the added frequency
Data Source
AI summary
The handpiece-type high-frequency vibration apparatus includes a roughly cylindrical housing 10 configuring a handpiece, a holding member 11, a tool 12, a controller 20 and an excitation device 21. In a non-contact state before the tool 12 is brought into contact with an object, the controller 20 drives the excitation device 21 so as to vibrate the tool 12 at an added frequency fp for which a predetermined frequency fs is added to a first resonance frequency fr1 of the tool 12. In a cutting state where the tool 12 is in contact with the object by a load that enables cutting of the object by the tool 12, the controller 20 controls drive of the excitation device 21 such that a third resonance frequency fr3 of the tool 12 increases and coincides with the added frequency fp, and increases a vibration frequency of the tool 12.