Conservative-force-controlled feed drive system for down milling

Abstract

Reviewed in this paper are the results of theoretical and experimental investigation of a novel down milling method. The method is based on controlling feed speed using conservative forces, where the active force which provides motion is the horizontal component of the cutting force. Feed motion is therefore realized without any active forces (active drive systems), while the feed speed is regulated by precision breaking of the workpiece, which is possible through hydraulic damping. In addition to the basic theoretical model of the feed drive system, the paper also presents the dynamic model of the drive system, taking into consideration fluid compressibility. Based on the model proposed, a physical instance of the feed drive system was designed, built and tested. The results of preliminary experimental investigation speak in favour of the proposed theoretical model, which enables practical application of this type of feed drive systems. © 2011 Journal of Mechanical Engineering. All rights reserved.