Cutting tool life tests of ceramic inserts for car engine sleeves

Abstract

This article is focused on the experimental determination of tool life tests for indexable ceramic cutting inserts. The set criterion of tool wear was = 0,6 mm (in accordance with ISO 3685) or 30 pieces of machined sleeves. After at least one of the mentioned parameters was achieved, the tests were stopped and evaluated. Two types of cutting material by Saint GobainAdvanced Ceramics s.r.o. Company – ZTA7NI andD250 were tested.We monitored their tool life at the same cutting parameters. The experiments were performed on machine tool – CHEMNITZ NILES N22. The machined material was the cast iron 25P mainly used for car engines. Tool wear was monitored on every fifth machined sleeve. Microgeometry was measured after tool wear test on each fifth sleeve. The aim was to determine the arithmetic tolerance of profile, the greatest height of profile and the external diameter . The measurement was carried out four times; arithmetic average was performed subsequently as it is shown in the tables.