Rotary cutting tool, such as a drill, comprising an exchangeable cutting insert, and an exchangeable cutting insert

US8807888B2 · kind B2 · utility

Assignee

• KENNAMETAL INC. · US

Inventors

• Bernhard Borschert · Bamberg, DE
• Dieter Muhlfriedel · Ebermannstadt, DE
• Jürgen Schwägerl · Vohenstrauß, DE
• Ruy Frota de Souza · Latrobe, US
• Michael D. Shultz · Derry, US
• Michael R. McCormick · Greensburg, US
• Robert A. Erickson · Raleigh, US

Key dates

• Filing date: Feb 1, 2013
• Grant date: Aug 19, 2014
• Expiry date: Feb 1, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/9098
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A tool shank for use with a cutting insert in a rotary cutting tool includes a body having, and adapted to be rotated about, a central longitudinal tool axis, the body having a tip portion structured to receive at least a portion of the cutting insert therein. The shank also includes a pair of chip flutes formed in the body and a pair of recesses, each recess bordering a respective chip flute. Each recess includes a rim portion extending perpendicular to the tool axis and a bearing surface extending at an incline relative to the tool axis. Each rim portion is adapted to engage a corresponding surface on the cutting insert. Each bearing surface is adapted to engage a corresponding bearing surface on the cutting insert in a manner such that the cutting insert is pulled against the body when the rotary cutting tool is rotated about the tool axis.