Turning insert

US11642727B2 · kind B2 · utility

Assignee

• AB Sandvik Coromant · SE

Inventors

• Adam JOHANSSON · Sandviken, SE
• Ronnie Lof · Sandviken, SE
• Joe Truong · Sandviken, SE

Key dates

• Filing date: Apr 16, 2019
• Grant date: May 9, 2023
• Expiry date: Jun 6, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23B2205/12
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A turning insert includes a top surface, an opposite bottom surface, and a reference plane located parallel to and between the top and the bottom surfaces. A nose portion includes a convex nose cutting edge, and a first and a second cutting edge. The nose cutting edge connects the first and second cutting edges. The first and second cutting edges form a nose angle of 71-85° relative to each other. The nose portion has a third convex cutting edge adjacent to the first cutting edge and a fourth cutting edge adjacent to the third convex cutting edge. The fourth cutting edge forms an angle of 10-30° relative to a bisector. The distance from at least a portion of the fourth cutting edge to the reference plane increases at an increasing distance from the nose cutting edge. A second protrusion is arranged between the nose cutting edge and the first protrusion.