Machine Tool Vibration Phase Control for Composite Vibration Limits
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Solution Overview
Problem
Existing eccentric machining techniques face issues with composite vibration exceeding allowable ranges, leading to potential machine tool overload and inefficiencies due to uncontrolled composite vibration of the tool relative to the workpiece.
Innovation Solution
A control device that includes a vibration command generator, relative vibration command generator, and a vibration phase adjuster to adjust the phase of vibrations caused by these commands, ensuring the composite vibration remains within allowable limits by optimizing phase differences and amplitudes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tool is vibrated relative to the workpiece during eccentric machining, then machining effectiveness is improved, but composite vibration may deviate from allowable range
Solution Approach 1:
The control device adjusts vibration parameters (amplitude, frequency, phase) dynamically to maintain composite vibration within allowable ranges while preserving machining effectiveness. The system modifies vibration command parameters based on real-time conditions to prevent harmful vibration levels.
Solution Approach 2:
The system monitors composite vibration levels and uses this feedback to adjust vibration commands, ensuring that vibration remains beneficial for machining without exceeding harmful thresholds. The control device continuously regulates vibration parameters based on measured vibration states.
2Productivity
If vibration amplitude is increased to improve machining, then cutting performance is enhanced, but machine tool load increases
Solution Approach 1:
The control device optimizes vibration amplitude parameters to achieve effective cutting performance while minimizing excessive loads on the machine tool. By precisely controlling vibration parameters, the system maintains performance benefits without proportionally increasing mechanical stress.
Solution Approach 2:
The system dynamically adjusts vibration parameters during machining operations, allowing amplitude to vary based on real-time conditions. This dynamic control enables high cutting performance when needed while reducing load during less demanding operations, rather than maintaining constant high vibration levels.
3Adaptability or versatility
If uncontrolled composite vibration occurs, then machining flexibility is maintained, but fretting wear and precision deteriorate
Solution Approach 1:
The control device adjusts vibration parameters to keep composite vibration within ranges that prevent fretting wear while maintaining machining flexibility. By controlling vibration amplitude and frequency within specific boundaries, the system preserves adaptability without sacrificing precision.
Solution Approach 2:
The system uses vibration monitoring feedback to ensure composite vibration remains within precision-preserving ranges while maintaining machining flexibility. The control device regulates vibration parameters based on measured conditions to prevent harmful effects like fretting wear.
Data Source
AI summary
Provided are a control device and a computing device capable of adjusting synthetic vibration for a machine tool. This control device, which controls a machine tool, comprises: a vibration command generation unit that generates a vibration command for vibrating an implement of the machine tool or a workpiece; a relative vibration command generation unit that generates a relative vibration command for vibrating the implement and the workpiece relatively; and a vibration phase adjustment unit that adjusts the vibration phase of at least one of the vibration command and the relative vibration command on the basis of the vibration command and the relative vibration command.