Method for machining workpieces

US8409423B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Erwin Bayer · Dachau, DE
• Martin Bussmann · Markt Indersdorf, DE
• Thomas Kraenzler · Salem, DE
• Albin Platz · Mering, DE
• Juergen Steinwandel · Überlingen, DE

Key dates

• Filing date: Oct 13, 2005
• Grant date: Apr 2, 2013
• Expiry date: Aug 17, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23H3/02
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A method for machining workpieces provides a machining electrode, which is guided at a specific distance to the workpiece. An electrolyte is provided between the workpiece and the machining electrode, through which an operating current flows between the machining electrode and the workpiece. The operating current results from an operating voltage (UA), which is produced at the machining electrode, the workpiece being connected to ground. To perform the machining procedure, the distance between the machining electrode and the workpiece is regulated and the operating voltage (UA) is determined in such a way that the resulting operating current is a DC current or a pulsed DC current—i.e., the operating voltage is a DC voltage of fixed or specific dimension. A measuring voltage (UM) is superimposed on the operating voltage (UA) for producing the operating current. The measuring current resulting because of the application of the measuring voltage (UM) is detected and the distance between the machining electrode and the workpiece is concluded from the relationship between the measuring voltage (UM) and the measuring current.