Procedure for deep rolling crankshafts

US7779660B2 · kind B2 · utility

Assignee

• HEGENSCHEIDT-MFD GmbH & CO. KG · DE

Inventors

• Ralf Freitag · Grevenbroich, DE
• Roland Heffe · Korschenbroich, DE
• Alfred Heimann · Aachen, DE
• Theo Nijssen · Roermond, NL
• Frank Risters · Erkelenz, DE
• Juergen Winnertz · Erkelenz, DE

Key dates

• Filing date: Feb 1, 2006
• Grant date: Aug 24, 2010
• Expiry date: Dec 16, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D7/08
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for deep rolling the passes or radii on the transitions between journal and cheeks or flanges of crankshafts by means of a deep rolling device (1) of a deep rolling machine, said deep rolling device having a lazy tongs-type design. The deep rolling device (1) has two tongs arms (2, 3) that are articulated to each other via a pivot joint (24). The corresponding outer ends (4, 5, 9, 10) of the tongs arms (2, 3) are provided with a deep rolling tool (6) or a force generator (11) for generating the deep rolling force. A measuring tape (18) and a sensor (19) which are provided on the pivot joint (24) are used to measure the impression depth of the deep rolling rollers (12) under the effect of the deep rolling force. A measuring device (22) mounted on the exterior (21) of a tongs arm (2) is used to measure the degree by which the tongs arm (2) bends under the effect of the deep rolling force.