Abstract

The operations of the machine, such as milling or drilling are the processes of shape transformation in which the metal is removed from the material stock to generate a part. The contact amongst the work piece and the generating tool creates substantial force. The study intends to examine and analyze different techniques of the model-based procedure control. Moreover, this research also aims at assessing a feature based approach, i.e., CNC approach. The program of CNC consists of a combination of machine specific instructions and machine specific codes. After reviewing the manuals of all modern CNC units from the different manufacturers, no efficient cycle was found for boring and counter-boring holes using a milling cutter. This research encapsulates the an investigation for the development of general programming algorithm, which is applied for boring or counter-boring many holes of different diameters using only one standard milling cutter. This algorithm has been integrated to produce a user-defined cycle (G888) and a subroutine for boring or counter-boring holes to achieve specific counter-bore diameters with accurate tolerance and good surface finishing. This programming algorithm can be equipped with our user-defined cycle (G881) to enable the machining of many counter-bore holes lying in a straight line (row/column/diagonal) or holes lying in regular or inclined matrix form. The algorithm can also be equipped with the presented user-defined cycle (G890) to machine counter-bore holes that form a circular pattern.

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