Proceedings of the 15th International Conference on Manufacturing Systems – ICMaS

Published by Editura Academiei Române, ISSN 1842-3183

Volume No. 1,  2006

"Politehnica" University of Bucharest, Machine and Manufacturing Systems Department

Bucharest, Romania, 26 – 27 October, 2006

Abstract: This paper presents a study of various methods suitable for automatic tool failure monitoring in thread tapping. To facilitate a specific diagnosis scheme for the tapping process the tow steps were taken: pattern recognition and fuzzy system. They should be evaluated based on success rate, sensivity and robustness. For example, in pattern recognition, large variance of a process conditions, and hence, is ineffective. In fuzzy systems, a small fuzzy degree indicates inaccuracy. From a tapping test the five tapping conditions were obtained: normal, tap wear, misalignment, hole oversize and hole undersize.

Dr. eng. Alexandru DORIN, Professor, "Politehnica" University

of Bucharest, Machine and Production Systems Department.

Dr. eng. Tiberiu DOBRESCU, Associate Professor, "Politehnica"

University of Bucharest, Machine and Production Systems

Department, E-mail: tibidobrescu@yahoo.com.

Ddr. eng. Andreea NICULAE, Assistant, "Politehnica" University

of Bucharest, Descriptive Geometry and Engineering

Graphics Department.