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J. Manuf. Mater. Process. 2018, 2(1), 19; https://doi.org/10.3390/jmmp2010019

Prediction of Feed-Rate Slowdowns in Precise Micromilling Processes

1
Institute of Machining Technology (ISF), TU Dortmund University, D-44227 Dortmund, Germany
2
Department of Computer Science (FI), TU Dortmund University, D-44227 Dortmund, Germany
*
Author to whom correspondence should be addressed.
Received: 31 January 2018 / Revised: 7 March 2018 / Accepted: 9 March 2018 / Published: 14 March 2018
(This article belongs to the Special Issue Precision Manufacturing)
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Abstract

In a production of filigree and complex geometries, different NC-controlled processes such as laser cutting, EDM milling, and micromachining require a constant feed rate to ensure high-quality manufacturing results. Due to the technically limited acceleration ability of the machine tool axes, the nominal feed cannot always be achieved. This in particular is the case when the machine tool has to perform a significant change of direction in corners. In this paper, the impact of too low feed rates on the process of precise micromilling of a hardened high-speed steel AISI (M3:2) 63 ± 1 HRC) is discussed. An unattained feed rate leads to a ploughing dominated process with a high burr formation resulting in a huge potential loss of micromilling processes. Furthermore, a simulation approach is presented which allows the prediction of the actually achieved feed rate. The developed machine model provides a reliable method to identify critical areas in the entire NC program. View Full-Text
Keywords: hard machining; micromilling; ploughing; feed-rate analysis hard machining; micromilling; ploughing; feed-rate analysis
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Meijer, A.; Krebs, E.; Wiederkehr, P.; Biermann, D. Prediction of Feed-Rate Slowdowns in Precise Micromilling Processes. J. Manuf. Mater. Process. 2018, 2, 19.

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