Press machine and method of detecting abnormality in press machine

Abstract

A press machine includes: a detection unit that detects a load value during press working on a workpiece material; a storage unit that stores load values for one cycle of the press machine detected by the detection unit in association with identification information of a die attached to the press machine during detection of the load values; a calculation unit that calculates eccentric loads for predetermined press angles based on the stored load values for one cycle of the press machine and generates eccentric load distribution data for each die; a determination unit that determines an abnormality based on the eccentric loads for the predetermined press angles obtained based on the load values for one cycle of the press machine detected by the detection unit and the eccentric load distribution data corresponding to a die attached to the press machine during the detection of the load values; and a notification unit that notifies of the abnormality based on a determination result of the determination unit.

Dependencies are inferred from the claim text.