Cutting Tool Vibration Sensing for Soft-Material Impact Extraction
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Solution Overview
Problem
Existing cutting processing apparatuses face difficulties in accurately extracting the impact amount during cutting of materials with lower hardness than stainless steel, as the transmitted vibration is small, making it challenging to measure the impact amount effectively.
Innovation Solution
A cutting processing apparatus is designed with a sensor positioned near the fixing portion of the cutting object to detect vibrations, converting time waveform data to frequency data and extracting the impact amount, while the control circuit adjusts the processing speed based on the impact amount to account for fluctuating revolutions and cutting edge frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is positioned at the main shaft support portion to detect vibration, then the impact amount can be extracted for hard materials like stainless steel, but the vibration signal is insufficient for soft materials like aluminum or copper
Solution Approach 1:
The patent introduces a new intermediary element - a sensor mounting portion on the fixing jig that directly contacts the cutting object. This intermediary structure allows the sensor to detect vibrations transmitted through the fixing jig rather than through the main shaft support, providing a more direct vibration transmission path for soft materials that generates sufficient detection signals.
2Measurement precision
If the sensor is placed close to the cutting object to detect vibration, then the impact amount can be accurately detected for soft materials, but the sensor arrangement becomes more complex
Solution Approach 1:
The patent merges the sensor mounting function with the existing fixing jig structure by adding a sensor mounting portion to it. This integration allows the sensor to be positioned close to the cutting object for accurate vibration detection while utilizing the existing fixing jig as the mounting base, thereby reducing overall system complexity compared to adding a separate mounting structure.
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 allows for accurate detection and measurement of impact amounts, reducing the influence of material hardness on the extraction process and enabling precise control of processing speed, thereby improving the cutting efficiency and accuracy.
Implementation Method 1
a sensor that is arranged in the vicinity of a position on the fixing portion at which the cutting object is to be fixed, and configured to detect vibration of the cutting tool during cutting processing of the cutting object and output a monitoring signal
Data Source
AI summary
A cutting processing apparatus includes a cutting tool, a chuck portion, a feed mechanism, a fixing portion that fixes the cutting object, a stage that moves the fixing portion at a processing speed in a direction substantially orthogonal to a rotation axis of the chuck portion, a sensor that is arranged in the vicinity of a position on the fixing portion at which the cutting object is fixed, detects vibration of the cutting tool during cutting processing of the cutting object, and outputs a monitoring signal, and a control circuit that converts time waveform data of the monitoring signal to frequency waveform data and extracts an impact amount during cutting processing of the cutting object from the frequency waveform data.