Anticipatory Online Compensation of Tool Deflection Using a Priori Information from Process Planning
Abstract
:1. Introduction
1.1. Recontouring by Automated Machining
1.2. Adaptive Machining Approaches for High Geometrical Accuracy
1.3. Objective and Approach
2. Machine Tool Prototype Neximo
2.1. Properties
2.2. Dynamic Positioning Response
3. Deflection Compensation
3.1. Reactive Deflection Compensation
3.2. Anticipatory Deflection Compensation
- The infrastructure of the CRC 871 provides geometry data of each blade after welding, which are then used offline for an individual path planning and NC code generation process. This also includes tool-workpiece-intersection calculations. The virtual workpiece twin then contains all these data.
- Before machining, the process force prediction initially loads the planned tool path in the form of WCS-coordinates (xi, yi, zi) together with the calculated engagement conditions (depth of cut ap, entry angle φe of the cutting edge) from the virtual workpiece twin.
- At runtime, the process force prediction receives the latest cutter positions and process parameters from the NC control. The planned tool path data are synchronised with these values and extrapolated into the future within the prediction horizon.
- The corresponding future engagement conditions are then used to calculate process forces based on a suitable process force model. The output value may, for example, be a force value Fy, +3, which corresponds to the force prediction for a point in time that lies 3 ms in the future.
- The further application of this force value corresponds exactly to the reactive compensation, as described in the previous section.
4. Experimental Setup
5. Results
5.1. Reactive Deflection Compensation
5.2. Anticipatory Deflection Compensation
6. Conclusions and Outlook
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Denkena, B.; Bergmann, B.; Schumacher, T. Anticipatory Online Compensation of Tool Deflection Using a Priori Information from Process Planning. J. Manuf. Mater. Process. 2021, 5, 90. https://doi.org/10.3390/jmmp5030090
Denkena B, Bergmann B, Schumacher T. Anticipatory Online Compensation of Tool Deflection Using a Priori Information from Process Planning. Journal of Manufacturing and Materials Processing. 2021; 5(3):90. https://doi.org/10.3390/jmmp5030090
Chicago/Turabian StyleDenkena, Berend, Benjamin Bergmann, and Tim Schumacher. 2021. "Anticipatory Online Compensation of Tool Deflection Using a Priori Information from Process Planning" Journal of Manufacturing and Materials Processing 5, no. 3: 90. https://doi.org/10.3390/jmmp5030090