DESIGNATION OF THE MINIMUM THICKNESS OF MACHINED LAYER FOR THE MILLING PROCESS OF DURALUMIN PA6

Abstract eng:
This article is to present the result of experimental research concerning measurements of the minimum thickness of machined layer to initiate the end milling process of duralumin PA6. The research was conducted in two stages at the laboratories of the Kielce University of Technology. The research required performance of machining tests that involved initiation of the milling process. The gradual initiation of the milling process was achieved thanks to a flowing change of machining depth by tilting the working surface of samples at a slight angle (Fig. 1). The designation of the minimum thickness of machined layer was implemented with the use of a 2D profile that represented the initiation zone of the machining process, which was achieved by measuring the working surface of samples with a skidless contact profilometer TOPO 01P. The results of experiments concerning the impact of feed and cutting speed on the value of the minimum thickness of machined layer have been presented in form of charts. Machining tests were conducted at a numerically controlled machining center AVIA VMC 800 with a milling head CoroMill 490 manufactured by Sandvik Coromant.

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