METHOD AND SYSTEM FOR REAL-TIME STATISTICAL PROCESS MONITORING OF STAMPING PRESS PROCESS

摘要

Method and system for monitoring the operation of a stamping press preferably for forming automobile parts, such as fenders and quarter panels, based on a plurality of features extracted from a press signature. The method includes defining the plurality of features, each feature representing a parameter associated with the process of forming the parts, and operating the stamping press so as to produce a predetermined number of production parts while collecting a production operating signature. The method also includes extracting the feature values from the production operating signature to obtain production feature values, and comparing the production feature values to predetermined operating limits which represent limits within which acceptable parts are formed. Two feature values of particular interest are sheet metal blank thickness and hardening coefficient of the sheet metal which are estimated from data obtained from at least two punch locations.