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J. Manuf. Mater. Process. 2018, 2(3), 46; https://doi.org/10.3390/jmmp2030046

Process Forces Analysis and a New Feed Control Strategy for Drilling of Unidirectional Carbon Fiber Reinforced Plastics (UD-CFRP)

1
Institute for Machine Tools and Production Processes, Chemnitz University of Technology, 09111 Chemnitz, Germany
2
Fraunhofer Institute for Machine Tools and Forming Technology, 09126 Chemnitz, Germany
*
Author to whom correspondence should be addressed.
Received: 17 May 2018 / Revised: 10 July 2018 / Accepted: 11 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue New Findings and Approaches in Machining Processes)
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Abstract

Reliable machining of carbon fiber-reinforced plastics (CFRP) is the key for application of these lightweight materials. Due to its anisotropy, CFRP is a very difficult material to machine because of occurring delamination and fiber-pullouts. The tool design is especially crucial to minimize and to avoid these processing errors. In this paper a process analysis for drilling is shown for better understanding of the chip formation. Drilling of unidirectional CFRP enables the investigation of the effect of fiber orientation on the chip formation process. In theory, the amount of cut fibers and the cutting angle to the main cutting edge determine the cutting force. Experimental tests with varied macroscopic drill geometries verify this theory. Based on these detected relationships, the tool loads can be calculated for a successful tool design. View Full-Text
Keywords: drilling; CFRP; tool design; fiber cutting angle drilling; CFRP; tool design; fiber cutting angle
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Sauer, K.; Dix, M.; Putz, M. Process Forces Analysis and a New Feed Control Strategy for Drilling of Unidirectional Carbon Fiber Reinforced Plastics (UD-CFRP). J. Manuf. Mater. Process. 2018, 2, 46.

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