Real-Time Feed Rate Control for Rotating Cutting Tools
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current cutting processes using rotating cutting tools face challenges in managing chatter vibrations, leading to reduced productivity and compromised workpiece quality due to conservative cutting conditions applied to mitigate tool and workpiece damage.
Innovation Solution
A method for real-time adjustment of the feed rate of rotating cutting tools, involving vibration data collection, chatter vibration trend analysis, and feed rate adjustments within limited ranges to optimize productivity while monitoring and controlling chatter vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the feed rate is increased to improve productivity, then the material removal rate increases, but chatter vibrations occur leading to tool damage and degraded process quality
Solution Approach 1:
The patent applies dynamics by transitioning from static feed rate settings to dynamic real-time adjustment. The feed rate is continuously modified based on live vibration monitoring, allowing the system to adapt to changing cutting conditions. This enables operation at higher feed rates while maintaining process stability through active feedback control.
Solution Approach 2:
The patent implements feedback control by monitoring vibration signals during cutting and using this information to adjust the feed rate. The vibration sensor provides continuous feedback about chatter conditions, and the control system responds by modifying the feed rate to suppress vibrations, thereby maintaining process quality while maximizing productivity.
2Reliability
If conservative cutting conditions are applied to avoid chatter vibrations, then process quality is maintained, but productivity is degraded
Solution Approach 1:
The system transitions from static conservative settings to dynamic adjustment, allowing the feed rate to vary in real-time based on actual vibration conditions. This enables the system to operate at higher feed rates when conditions permit while automatically reducing to conservative levels when chatter occurs, thereby improving overall productivity while maintaining quality.
Solution Approach 2:
The system performs self-adjustment by automatically modifying the feed rate based on its own vibration monitoring. This self-service capability eliminates the need for manual intervention or overly conservative preset values, allowing the system to optimize its own performance in real-time and achieve higher productivity without sacrificing process quality.
3Duration of action of stationary object
If manual recommended cutting conditions are used, then tool lifespan is maximized under static load, but dynamic chatter vibrations cause tool damage
Solution Approach 1:
The patent uses vibration feedback to detect chatter conditions and automatically adjusts the feed rate to suppress vibrations. This feedback mechanism protects the tool from chatter-induced damage while allowing operation at higher feed rates, thereby extending tool lifespan through active vibration control rather than relying solely on conservative static settings.
Solution Approach 2:
The system takes preliminary anti-action by detecting early signs of chatter through vibration monitoring and proactively adjusting the feed rate before severe vibrations occur. This preventive approach protects the tool from damage by addressing vibration issues in their initial stages, extending tool lifespan more effectively than reactive measures.
Data Source
AI summary
Disclosed are a method for setting a feed rate of a rotating cutting tool in real time and a device for controlling a feed rate of a rotating cutting tool in real time. The method includes: a vibration data collecting operation (S20) of collecting vibration information from a sensor installed in a machine tool (100); a chatter vibration trend diagram deducing operation (S30) of deducing a chatter vibration trend diagram (G) by simplifying an increase and a decrease of chatter vibration based on the collected vibration data; a chatter vibration trend determining operation (S40) of determining whether an inclination of the chatter vibration trend diagram (G) is increased or decreased; and tool feed rate adjusting operations (S51 and S52) of adjusting a feed rate of the tool to be decreased when the inclination of the chatter vibration trend diagram (G) is increased.