Tools for machining bores

US5322398A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hermann Schmidt · Linz, DE
• Dieter Aulich · Gomaringen, DE
• Peter Essig · Karlsruhe, DE

Key dates

• Filing date: Jun 29, 1992
• Grant date: Jun 21, 1994
• Expiry date: Jun 29, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/909
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The tool for machining bore transitions includes a holder drivable rotatably through at least one rotation, and drivable in an advance stroke and in a return stroke; and a spring wire having at least two resilient arms with overlapping movable free end, the spring wire being bent into a hairpin shape so as to have a stem or bent end portion structured to be inserted and held in the holder and a cutting medium provided on the free ends of the resilient arms for machining the bore transitions. The holder can advantageously be provided with a slot for the stem, threaded bolts which engage between the resilient arms of the spring wire and a spring which spring-loads the side of the spring wire inserted in the slot.