Process and machine for the electric discharge machining of cutter plates

US5326954A · kind A · utility

Assignee

• Vollmer Werke Maschinenfabrik GmbH · DE

Inventors

• Peter Lenard · Biberach, DE
• Norbert Bailer · Biberach an der Riß, DE

Key dates

• Filing date: Dec 23, 1992
• Grant date: Jul 5, 1994
• Expiry date: Dec 23, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23H9/00
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

For the electric discharge machining of cutter plates (60) by means of an electrode wire (50) a respective cutter plate (60) is rotated under program control about a workpiece axis (A) and is adjusted rectilinearly with respect to the electrode wire (50) along at least one of three axes (X, Y, Z) of a rectangular coordinate system, among them one axis (X) which is parallel to the workpiece axis (A). During the machining of a flank (64) adjacent a cutting edge (66), the cutter plate (60) is rotated in such manner about the workpiece axis (A) that the point at which the electrode wire (50) intersects the cutting edge (66) always lies on a tool axis (E) which extends at right angles to the electrode wire (50) and to two axes (X, Y) of the coordinate system. During the machining of portions of the flank (64) which are located adjacent portions of the cutting edge (66) not in parallel with the workpiece axis (A), the electrode wire (50) is rotated about the tool axis (E).