Hole punch for high-pressure shaping tool

US6260393A · kind A · utility

Assignee

• Schuler Hydroforming GmbH & Co. KG · DE

Inventors

• Bernd Engel · Stuttgart, DE
• Martin Lackner · Olpe, DE

Key dates

• Filing date: Aug 18, 2000
• Grant date: Jul 17, 2001
• Expiry date: Aug 18, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T83/9476
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A punch assembly for a high-pressure shaping tool having a seat opening into the tool has a guide sleeve fitted in the seat, centered on an axis, and having a radially outwardly directed outer surface radially confronting an inner surface of the seat. A punch is axially displaceable in the sleeve. A clamping element engaged radially between the inner seat surface and the outer sleeve surface retains the sleeve in the seat. The seat is formed with a radially inwardly open groove and the element is a ring engaged in the seat. A screw can serve for pressing the ring radially against the punch. Alternately the ring is pressed radially against the punch by fluid pressure applied radially outside the ring. The ring is elastomeric and is normally of C-section.