Circuit arrangement for an adjusting drive for a press ram adjustment

US4481847A · kind A · utility

Assignee

• L. Schuler GmbH · DE

Inventors

• Franz Schneider · Göppingen, DE
• Ewald Bergmann · Rechberghausen, DE
• Gerhard Gering · Süßen, DE

Key dates

• Filing date: Apr 15, 1982
• Grant date: Nov 13, 1984
• Expiry date: Apr 15, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/87
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A circuit or control arrangement for an adjusting drive of a press ram of a high-speed cutting press which includes top and bottom dies respectively attached to the press ram and a platen of the press with the top die being adapted to dip or penetrate during a cutting process into the bottom die. An arrangement is provided for maintaining the depth of penetration of the upper die means into the lower die means to a constant value in dependence upon an operating condition of the high-speed cutting press. The maintaining arrangement may include at least one limit switch operatively connected with an oscillator stage which provides adjusting signals to the drive motor. In lieu of a limit switch, a cutting force measuring sensor member may be interconnected with an evaluator circuit and the oscillator means so as to control the drive motor.