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AssigneeFord Global Technologies, LLC
InventorsBrij Bahadur Seth, Youssef Ali Hamidieh
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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.
A method for characterizing a machine tool system including a machine tool having a plurality of cooperating elements defining a machine tool structure, tooling connected to the machine tool structure for performing a machining operation on a workpiece, and fixturing connected to the machine tool structure for securing the workpiece during machining, the method comprising:
A method for characterizing a machining process using a limited number of discriminants, the machining process being performed on a workpiece by a machine tool having a plurality of cooperating components defining a machine tool structure, the method comprising:
A system for characterizing a machine tool system including a machine tool having a plurality of cooperating elements defining a machine tool structure, tooling connected to the machine tool structure for performing a machining operation on a workpiece, and fixturing connected to the machine tool structure for securing the workpiece during machining, the system comprising:
Dependencies are inferred from the claim text.