Vibration Display Device for Machine Tool Chatter Detection
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Solution Overview
Problem
Existing vibration information display devices for machine tools do not effectively and instantly notify operators of chatter vibrations during unattended operations, making it difficult to promptly address process abnormalities and tool damage.
Innovation Solution
A vibration information display device equipped with vibration detection, acquisition, and storage units, along with a display control unit that instantly displays chatter vibration information on a monitor, including trajectory information of the tool's blade edge, and provides countermeasures to restrain chatter vibrations, enabling operators to take immediate action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration information is continuously monitored and displayed during unattended operations, then operators can promptly detect chatter vibrations and process abnormalities, but information overload occurs making it difficult to identify critical issues
Solution Approach 1:
The patent extracts and displays only the most critical vibration information - specifically when vibration amplitude exceeds threshold A or rate of change exceeds threshold B - rather than continuously displaying all vibration data. This extraction principle filters out non-critical information while preserving essential abnormality detection capability.
Solution Approach 2:
The patent applies different display qualities to different vibration states: critical abnormalities (exceeding thresholds) receive prominent display with immediate notification, while normal vibrations are not displayed. This local quality differentiation ensures operators focus on critical issues without information overload.
2Reliability
If operators continuously monitor vibration information during processing, then chatter vibrations can be detected early, but operator attention is required throughout the entire processing time which is impractical for long processing operations
Solution Approach 1:
The patent implements automatic feedback mechanisms where the vibration detection unit continuously monitors and automatically notifies operators only when critical thresholds are exceeded. This feedback system eliminates the need for continuous operator attention while maintaining reliable chatter detection through automated threshold-based alerts.
3Loss of information
If all vibration data is recorded and displayed, then complete processing history is available for analysis, but the volume of data makes it difficult to quickly identify critical chatter vibration events
Solution Approach 1:
The patent extracts only critical vibration events exceeding predefined thresholds from the complete processing history, separating essential abnormality data from routine operational data. This extraction enables quick identification of chatter vibration events while maintaining complete historical records for comprehensive analysis when needed.
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 device allows for immediate notification of process abnormalities and automatic vibration restraint during unattended operations, optimizing processing by providing operators with essential information and countermeasures without requiring advance preparation.
Implementation Method 1
a vibration detection unit 13 configured to detect the chatter vibrations
Data Source
AI summary
A vibration information display device includes a monitor, a vibration information acquisition unit, an operating information acquisition unit, a storage unit, and a display control unit. The monitor displays information on the chatter vibrations. The vibration information acquisition unit acquires vibration information when the chatter vibrations are detected. The operating information acquisition unit acquires operating information of the machine tool when the chatter vibrations are detected. The storage unit stores the acquired vibration information and operating information. The display control unit displays the vibration information and the operating information stored in the storage unit on the monitor. Alternatively, the display control unit displays the vibration information stored in the storage unit on the monitor together with trajectory information of a blade edge of the tool included in the operating information.