The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1997
Filed:
Sep. 06, 1995
Brij Bahadur Seth, Canton, MI (US);
Youssef Ali Hamidieh, Bloomfield Hills, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A system and method for characterizing a machining process using techniques of mechanical signature analysis produces discriminants based on vibrational activity, measured at various positions on a machine tool. The system and method provide a complete characterization of an industrial machine tool including the machining structure, tooling, fixturing, workpiece, and operating environment under transient and steady state conditions both with and without machining loads. The method includes selection of appropriate sensors (24), sensor locations (24), mounting methods (24), signal conditioning (26), and data acquisition (28) and analysis (30) based upon the particular type of machine and machining process. The vibration signature analysis includes both time and frequency domain analysis. Dynamic stiffness measurements (36) are utilized in combination with data gathered from the machine tool during idle and machining periods to generate uniform discriminants (32) which provide an indication of machine operation. Machine information, including the uniform discriminants, is preferably stored in a database for future comparison and trending.