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Numerical approach of adaption the cutting path to the thermo-elastic deformation in milling process

Presentation held at XXVIII CIRP Sponsored Conference on Supervising and Diagnostics of Machining Systems; March 14th, 2017, Karpacz
Numerischer Ansatz zur Adaption der NC-Bahn an die thermo-elastischen Verformungen während des Fräsprozesses
 
: Putz, Matthias; Ihlenfeldt, Steffen; Glänzel, Janine; Unger, Roman

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Präsentation urn:nbn:de:0011-n-5195159 (1.3 MByte PDF)
MD5 Fingerprint: f71edd0f1dcfdc890dc421fb3953fef3
Erstellt am: 21.11.2018


2017, 16 Folien
Conference on Supervising and Diagnostics of Machining Systems <28, 2017, Karpacz>
Englisch
Vortrag, Elektronische Publikation
Fraunhofer IWU ()
adaptive finite element; milling; tool center point; thermo-elastic correction

Abstract
Based on the method of adaptive finite elements (FEM) a correction approach has been considered to identify the influence of thermo-elastic workpiece deformations during the production process milling. The focus is a simulation-based tolerance variation calculation of cutting paths, which is caused by the heat input of the machine tool. Therefore a mathematical method is developed to numerically depict the progress of the miller with different curves A(t), B(t) and C(t). These curves are used to map the state of the milling path during the production process as well as to compare the current workpiece contour and the target workpiece contour. The tool center point (TCP) correction results from mapping of time-dependent deformation fields from the FE simulation. The aim is, on the one hand, to make statements before the production about keeping the tolerance, and on the other hand, to derive other correction approaches for the adaption of the cutting path coordinates. Based on these mathematically model an optimization algorithm for milling curve adaption is to develop. Using this optimization approach an adjusted milling curve will be computed, so that after cooling down of the workpiece the resulting milling curve matches the planned milling curve.

: http://publica.fraunhofer.de/dokumente/N-519515.html