Model based compensation of geometrical deviations due to process forces

• Autorzy: Denkena B. , Dahlmann D. , Peters R. , Witt M.
• Języki publikacji: EN

Abstrakty

EN

Machining accuracy can be considerably affected by deflections of machine tool components and the workpiece. This work presents a new approach for real-time deflection compensation, based on control integrated models. A real-time material removal rate (MRR) simulation determines the depth of cut which is used for process force calculation by Kienzle-Equations. Machine tool and workpiece deflections are then derived from a mechanical model using the calculated process forces. For this purpose, control based signals are used as model inputs. The total deviation is sent to the position controller as a setpoint offset. A dynamometer was applied to validate the simulated process forces. The presented approach was validated for cylindrical turning operations on chucked steel shafts. The experiments were carried out on a high-precision slant bed lathe. The results show, that geometrical errors could be reduced by more than 70% on average.

Słowa kluczowe

EN

model based compensation; reduction of geometrical errors; real-time model

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2017
• Tom: Vol. 17, No. 1
• Strony: 5--16
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Denkena B.

• Leibniz Universität Hannover, Institute of Production Engineering and Machine Tools (IFW), Germany

autor

Dahlmann D.

• Leibniz Universität Hannover, Institute of Production Engineering and Machine Tools (IFW), Germany

autor

Peters R.

• Leibniz Universität Hannover, Institute of Production Engineering and Machine Tools (IFW), Germany

autor

Witt M.

• Leibniz Universität Hannover, Institute of Production Engineering and Machine Tools (IFW), Germany

Bibliografia

• [1] CARRINO L., GIORLEO G., POLINI W., PRISCO U., 2002, Dimensional errors in longitudinal turning based on the unified generalized mechanics of cutting approach. Part I: Three-dimensional theory, International Journal of Machine Tools & Manufacture, 42, 1509-1515.
• [2] DENKENA B., LITWINSKI K.M., BROUWER D., BOUJNAH H., 2013, Design and analysis of a prototypical sensory Z-slide for machine tools, Prod Eng., 7/1, 9-14.
• [3] HESSELBACH J., 2011, Adaptronik für Werkzeugmaschinen, Shaker Verlag, Aachen.
• [4] HOFFMANN F., 2008, Optimierung der dynamischen Bahngenauigkeit von Werkzeugmaschinen mit der Mehrkörpersimulation, Dr.-Ing. Diss, RWTH Aachen.
• [5] KEISER R., 2007, Kompensation von statischen und dynamischen Verlagerungen im Fräsprozess, Dr.-Ing. Diss. RWTH Aachen.
• [6] KIENZLE O., 1952, Die Bestimmung von Kräften und Leistungen an spanenden Werkzeugen und Werkzeugmaschinen, VDI-Z, 94/11-12, 299-305.
• [7] KORAJDA B., 2007, Steuerungstechnische Verfahren zur echtzeitfähigen Kompensation der Fräserabdrängung, Dr.-Ing. Diss. Universität Stuttgart.
• [8] LIU Z.Q., 2001, Methodology of parametric programming for error compensation on CNC centers, Int. Journal of Adv. Manufacturing Technology, 17, 570-574.
• [9] LIU Z.Q., 1999, Repetitive measurement and compensation to improve workpiece machining accuracy, Int. Journal of Adv. Manufacturing Technology, 15, 85-89.
• [10] MAYER J.R.R., PHAN A.V., CLOUTIER G., 2000, Prediction of diameter errors in bar turning: a computationally effective model, Applied Mathematical Modelling, 24, 943-956.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).