Machining Control Using Instantaneous Workpiece Mass and Inertia
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Solution Overview
Problem
Existing machining methods fail to efficiently adapt control parameters to the dynamically changing mass and moment of inertia of a workpiece during processing, leading to inefficiencies and potential damage risks.
Innovation Solution
A method and device that dynamically adapt control parameters based on the instantaneous mass and moment of inertia of the workpiece using a geometric model, allowing for continuous optimization of machining systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control parameters are set defensively based on maximum mass, then system safety is improved, but machining efficiency deteriorates
Solution Approach 1:
The control parameters are dynamically adapted during machining based on the instantaneous mass of the workpiece. As material is removed, the mass decreases and control parameters are automatically adjusted, allowing the system to operate at optimal performance levels throughout the machining process rather than being constrained by maximum mass settings.
Solution Approach 2:
The system uses feedback from the geometric model to continuously determine the instantaneous mass of the workpiece during machining. This feedback loop enables real-time adjustment of control parameters, allowing the system to respond to changing mass conditions and optimize performance accordingly.
2Adaptability or versatility
If control parameters are updated at selected time points, then adaptability is improved, but control precision deteriorates
Solution Approach 1:
The system continuously determines the instantaneous mass of the workpiece throughout the machining process using the geometric model, rather than updating parameters only at selected time points. This continuous adaptation ensures both high adaptability and precise control by maintaining up-to-date control parameters at all moments during machining.
3Measurement precision
If separate test runs are conducted to measure mass, then measurement accuracy is improved, but productivity deteriorates
Solution Approach 1:
Instead of conducting separate physical test runs to measure mass, the system creates and uses a geometric model (a digital copy) of the workpiece to determine the instantaneous mass during machining. This virtual model allows accurate mass determination without requiring additional physical measurements or test runs, thereby maintaining both measurement accuracy and productivity.
Data Source
AI summary
In a method for machining a workpiece with a machining system, the machining system is controlled with at least one control parameter, which is then adapted during machining of the workpiece based on an instantaneous mass of the workpiece or based on an instantaneous moment of inertia of the workpiece. The instantaneous mass of the workpiece or the instantaneous moment of inertia of the workpiece are dependent on a machining progress and are ascertained with reference to a geometric model of the workpiece to be machined based on a density of the workpiece and an instantaneous shape of the workpiece as determined with reference to the geometric model of the workpiece. The geometric model is updated with reference to a machining simulation.