Virtual Machining Feedback Control for Grinding Accuracy
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Solution Overview
Problem
Existing grinding simulation systems fail to accurately simulate real-world machining phenomena in machine tools, leading to inconsistencies in dimensional accuracy and properties of mass-produced workpieces.
Innovation Solution
A cyber-physical system that synchronizes a machine tool in the real world with a computer device in a virtual world to generate and predict actual machining phenomena, allowing for the output of optimal command values to correct and improve machining accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If grinding simulation is executed based on ideal machining phenomenon set in advance, then the simulation can be performed with predetermined parameters, but the simulation cannot accurately reflect actual machining phenomena that change from moment to moment in the real world
Solution Approach 1:
The system continuously acquires actual machining data from sensors during the grinding process and feeds this information back to update the simulation model in real-time. This closed-loop feedback mechanism allows the virtual machining phenomenon to reflect actual changing conditions, resolving the contradiction between using predetermined parameters and accurately representing dynamic real-world machining phenomena.
Solution Approach 2:
The system performs preliminary actions by pre-establishing the virtual machining model and simulation framework before actual machining begins. The model is then continuously updated with real-time data during machining, allowing the simulation to be prepared in advance while adapting to actual conditions as they develop.
2Device complexity
If the virtual machining phenomenon is generated based on ideal machining phenomenon, then the computation can be simplified, but the prediction of actual machining phenomenon deteriorates the dimensional accuracy and properties of workpieces
Solution Approach 1:
The system creates a virtual copy of the actual machining system including the machine tool, workpiece, and machining conditions. This virtual model replicates the physical system's behavior and is updated in real-time with actual machining data, allowing complex real-world phenomena to be simulated without requiring equally complex physical experimentation while maintaining accuracy in predicting workpiece dimensional accuracy and properties.
3Manufacturing precision
If mass-produced workpieces require uniform dimensional accuracy and properties, then consistent machining quality is needed, but actual machining phenomena that change from moment to moment cause variations in workpiece quality
Solution Approach 1:
The real-time feedback mechanism continuously monitors actual machining phenomena and updates the virtual model to reflect changing conditions. This allows the system to detect and compensate for variations in machining parameters, maintaining consistent workpiece quality despite moment-to-moment changes in the machining process by adjusting control commands based on simulated predictions.
Data Source
AI summary
A cyber-physical system type machining system includes: a machine tool disposed in a real world and including a machine body and a control device; and a computer device connected to communicate with the control device and including a processor and a memory storing a program for generating, in a virtual world, a virtual machining phenomenon corresponding to an actual machining phenomenon with regard to a workpiece and the machine body. The program, when executed by the processor, causes the computer device to perform: acquiring a command value in synchronization with the control device, the command value for controlling the machine body by the control device; generating a future virtual machining phenomenon, which is the virtual machining phenomenon in a future, based on the command value; and outputting, to the control device, an optimal command value for correcting the command value based on the future virtual machining phenomenon.