Milling Device Dynamic Rotor Oscillation Control
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Solution Overview
Problem
Conventional milling devices face challenges in adjusting milling parameters during operations due to changes in material properties, such as temperature and humidity, leading to non-uniform grain size and inefficient milling processes.
Innovation Solution
A milling device equipped with a sensor to measure material properties in real-time and a control module to adjust parameters like oscillation angle, frequency, and rotation speed, allowing for dynamic control of the rotor assembly and screen assembly movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If milling parameters are fixed during operation, then the device structure is simple, but the grain size uniformity deteriorates as material properties change
Solution Approach 1:
The milling device implements dynamic adjustment of milling parameters during operation. The rotor assembly's oscillation amplitude and frequency can be varied in real-time based on material properties, transforming a static system into a dynamic one that adapts to changing conditions, thereby maintaining grain size uniformity throughout the milling process
Solution Approach 2:
The system incorporates feedback mechanisms where material properties (such as temperature and humidity) are monitored during milling, and this information is used to automatically adjust milling parameters. This closed-loop control ensures that grain size uniformity is maintained by responding to actual material state changes
2Manufacturing precision
If milling parameters are adjusted during operation to maintain grain size uniformity, then grain size uniformity is improved, but the device complexity increases
Solution Approach 1:
The invention changes physical parameters of the milling system during operation, specifically varying the oscillation amplitude and frequency of the rotor assembly. These parameter changes are implemented through a control system that adjusts motor speed and oscillation characteristics, enabling adaptation to material property changes without requiring complete system redesign
Solution Approach 2:
The milling device is designed with multi-functionality, where the same rotor assembly and drive mechanism can operate in different modes (different oscillation amplitudes and frequencies) to handle varying material properties. This universal design allows a single device to maintain grain size uniformity across different milling stages and material conditions
3Productivity
If high rotation speed is used to increase productivity, then milling efficiency is improved, but temperature increase becomes harmful to material quality
Solution Approach 1:
The rotor assembly performs periodic oscillating movements in addition to rotation, creating cycles of high-intensity milling followed by brief periods where material can redistribute and cool. This periodic action pattern allows maintaining high average productivity while preventing continuous temperature buildup that would harm heat-sensitive materials
Data Source
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AI summary
A milling device (1) for performing a milling operation comprising a milling unit (2) comprising a housing (3) defining a milling chamber (16) that can be filled with a material to be milled, a rotor assembly (4) rotatably mounted in the housing (3), and a screen assembly (13) for fractionating the material milled by the rotor assembly (4) in movement and extending below the rotor assembly (4); and a drive unit (20) adapted for controlling the movements of the rotor assembly (4) relative to the screen assembly (13) during the milling operation; wherein said drive unit (20) is configured to produce an oscillating movement of the rotor assembly (4), the oscillating movement having an oscillation angle that can be varied during the milling operation when controlling the movements of the rotor assembly (4) relative to the screen assembly (13). The milling device (1) has improved milling efficiency.