TOOL LIFE MANAGING APPARATUS FOR STEPPED TOOL

摘要

Provided is a tool life managing apparatus for a stepped tool capable of appropriately managing the tool life of each blade provided to the stepped tool and reducing cost and work for blade replacement. A tool life managing apparatus 1 manages the tool life of a stepped tool 10 provided with a plurality of replaceable blades in a multi-stage manner, and includes: a blade data storing unit 32 that stores, for each of the plurality of blades, a threshold concerning the tool life of the blade, an evaluation value indicating the degree of use at present of the blade, and a level distance from a leading-end blade; an accumulated machining count value acquiring unit 45 that acquires accumulated machining count values of a working machine 5 before and after machining by the stepped tool 10; an evaluation value updating unit 46 that updates the evaluation value of each blade on the basis of the accumulated machining count values, the evaluation value, and the level distance; and an evaluation value determining unit 47 that determines whether or not the updated evaluation value reaches the threshold.