Machine Tool Vibration Reduction Using Real-Time Opposite Excitation
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Solution Overview
Problem
Existing vibration reduction devices for machine tools are unable to actively and automatically reduce vibrations in real time due to fixed mass and frequency, leading to increased costs, reduced stability, and decreased machining accuracy.
Innovation Solution
An active vibration reduction device and method that utilizes an excitation unit with a sliding mechanism using an electromagnet, which generates excitation opposite to the sensed vibration data in real time, thereby actively reducing vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed mass and frequency vibration reduction device is used, then the device structure is simple, but the vibration reduction effectiveness decreases when dynamic characteristics change
Solution Approach 1:
The patent applies dynamics by making the excitation unit's mass and frequency adjustable rather than fixed. The excitation unit includes a movable mass component that can change position to alter the system's dynamic characteristics, allowing the vibration reduction device to adapt when the machine tool's dynamic characteristics change during operation.
Solution Approach 2:
The patent changes physical parameters of the excitation unit, specifically the mass distribution and natural frequency. By adjusting the position of the movable mass component, the system modifies its mass moment of inertia and natural frequency to match changing operational conditions, thereby maintaining vibration reduction effectiveness.
2Manufacturing precision
If real-time active vibration reduction is implemented, then machining accuracy improves, but device complexity and cost increase
Solution Approach 1:
The patent implements feedback by using vibration sensors to detect actual vibration characteristics during machine tool operation. This detected information is fed back to the control system, which automatically adjusts the excitation unit's parameters in real-time to counteract the detected vibrations, thereby maintaining high machining accuracy.
Solution Approach 2:
The vibration reduction device performs self-adjustment through automatic control. The system monitors its own performance via vibration sensors and autonomously modifies the excitation unit's characteristics without external intervention, reducing the need for complex external control systems while maintaining machining accuracy.
3Force
If the excitation unit mass is increased, then vibration reduction capability improves, but space utilization decreases and production cost increases
Solution Approach 1:
The patent segments the excitation unit's mass into multiple components, including a movable mass component that can be positioned at different locations. This segmentation allows the system to achieve effective vibration reduction through strategic mass distribution rather than simply increasing total mass, thereby reducing the space required while maintaining or improving vibration reduction capability.
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 solution enables real-time active vibration reduction, improving machining accuracy, safety, and reliability, while also reducing production and maintenance costs through miniaturization and increased space utilization.
Implementation Method 1
an excitation unit with a sliding mechanism using an electromagnet, which generates excitation opposite to the sensed vibration data in real time
Data Source
AI summary
The present disclosure relates to an active vibration reduction device and method of a machine tool, and more specifically, to an active vibration reduction device and method of a machine tool wherein vibration generated from an individual unit is automatically and actively reduced in real time by changing and generating excitation opposite to vibration data of the individual device in real time in an excitation unit.