Cutting element, tool, and method for producing a helically extending, trapezoidally undercut groove in a cylindrical surface of a bore

US10710178B2 · kind B2 · utility

Assignees

• Guehring KG · DE
• Grob-Werke GmbH & Co. XG · DE

Inventors

• Michael Duck · Adairsville, US
• Bernhard Gand · Eschweiler, DE
• Michael Mueller · Dresden, DE
• Christoph Moerz · Bohmte, DE

Key dates

• Filing date: Sep 5, 2017
• Grant date: Jul 14, 2020
• Expiry date: Sep 5, 2037

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23B2251/28
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A cutting element for a tool to create a helically extending, trapezoidally undercut groove in a cylindrical surface of a bore. The cutting tool, preferably configured as a cutting insert, has groove-cutting teeth to create a symmetrically cross-sectioned groove which are arranged in series in a division harmonized with the pitch of the groove to be created. These groove-cutting teeth comprise at least one pre-machining tooth to create and machine a base groove and several trapezoidal teeth following the at least one pre-machining tooth, which have a tooth head profile which expands trapezoidally in cross-section in the vertical direction of the tooth with two flanks delimiting a flank angle for further machining the base groove to a trapezoidally undercut final cross-section. The flank angle delimited by the two flanks increases from at least one trapezoidal tooth to a following trapezoidal tooth to a defined final dimension.