Method for determining the position of a punch of a powder press

US6442859B1 · kind B1 · utility

Assignee

• Wilhelm Fette GmbH · DE

Inventors

• Jurgen Hinzpeter · Schwarzenbek, DE
• Ingo Schmidt · Schwarzenbek, DE
• Jörg Reitberger · Hamburg, DE
• Ulrich Gathmann · Hamburg, DE
• Klaus Russmann · Schwarzenbek, DE
• Thomas Pannewitz · Klein Pampau, DE
• Stephan Mallon · Schwarzenbek, DE
• Alexander Oldenburg · Schwarzenbek, DE

Key dates

• Filing date: Apr 18, 2000
• Grant date: Sep 3, 2002
• Expiry date: Apr 18, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2999/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for determining the position of a punch with respect to a die in a powder press with the following steps:storing a reference measure in a computer corresponding to a predetermined relatively small distance of the punch to the upper edge or lower edge of the die,storing a reference offset in the computer by counting the pulses of an incremental path sensor actuated by the punch on raising the punch from the reference measure to an index pulse,measuring the position of the punch above the reference offset using an absolute path sensor which evaluates the path of the adjusting piston for the punch and whose readings are inputted into the computer, andinputting the pulses of the incremental path sensor into the computer as soon as the actual position of the punch is equal or smaller than the sum measure of the reference offset and the reference measure.