Machining Tool Drum Vibration Control
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Solution Overview
Problem
Existing machining devices for removing hard materials like concrete, rock, and minerals face critical operating points that lead to either reduced efficiency or device damage, necessitating optimized operating parameters to avoid these issues.
Innovation Solution
Incorporating measuring sensors for translational and rotational vibrations, a vibration analysis module, and a controller module to dynamically adjust rotational and relative speeds based on vibration spectra, allowing for real-time optimization of machine parameters such as rotational speed and feed speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher rotational speeds and feed rates are used to increase removal rates, then productivity improves, but device damage and tool wear occur due to critical operating points
Solution Approach 1:
The patent implements a feedback control system using vibration sensors to continuously monitor the machining process. The measured vibrations are fed back to the control device, which automatically adjusts operating parameters (rotational speed, feed rate) to keep the system away from critical operating points, thereby preventing device damage while maintaining high productivity
Solution Approach 2:
The system dynamically adjusts operating parameters in real-time based on measured vibrations. Instead of using fixed parameters, the rotational speed and feed rate are continuously adapted according to the current vibration state, allowing the system to operate at optimal points that maximize removal rate while avoiding critical conditions that cause damage
2Productivity
If operating parameters are optimized for maximum removal rate, then productivity improves, but the system may encounter critical operating points causing damage
Solution Approach 1:
Vibration sensors provide continuous feedback about the machining state, enabling the control system to detect approaching critical operating points and adjust parameters preemptively, thus avoiding damage while maintaining high removal rates
Solution Approach 2:
The system uses the harmful vibrations that signal approaching critical points as useful information. By monitoring these vibrations, the control device can detect critical conditions and adjust parameters to avoid damage, converting the harmful effect into a protective mechanism
3Reliability
If vibration analysis and real-time control are implemented, then operational efficiency and service life improve, but device complexity increases
Solution Approach 1:
The machining system performs self-diagnosis and self-adjustment through integrated vibration sensors and control algorithms. The system automatically monitors its own state and adjusts operating parameters without external intervention, extending service life while adding only minimal complexity through software-based control
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 approach enhances operational efficiency by minimizing wear and maximizing removal rates, optimizing machine behavior, and extending device service life by controlling harmonics and sub-harmonic vibrations, thereby improving the overall machining process.
Implementation Method 1
measuring sensors for measuring the translational vibration of the device and/or at least one measuring sensor for determining the rotational vibration of the tool drum
Data Source
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AI summary
The invention relates to a method and a device for machining materials by milling and/or drilling, in particular for removing rock, concrete, minerals or coal, having a tool drum (10) in which a plurality of tool shafts (9) which bear machining tools (7) at their ends projecting from the tool drum (10) are mounted such that they can be driven in rotation. A drive element (12) for the tool shafts and the tool drum (13) can be rotated relative to each other, and the drum carrier can be moved relative to the material by using a movement device (6, 7). By means of a control device, the speed of the relative movement between tool carrier (2) and material and the rotational speed of the tool drum (10) can be varied. In order to avoid critical operating points, the device is assigned at least one measuring sensor (30) for measuring the natural translational vibration and/or at least one measuring sensor (32; 34) for determining the rotational vibrations of the tool drum (10), and the control device has at least one vibration analysis module, by means of which, in a vibration analysis, a vibration spectrum can be determined, and at least one controller module, by means of which drive parameters can be or are controlled as a function of the vibrations determined by the analysis module.