Patent · US Expired

Cutting insert with twisted relief surface

US5447396A · kind A · utility

9Cited by

7References

8Claims

0Family size

Assignee

SANDVIK AB · SE

Inventors

Goran Pantzar · Solna, SE
Per Nilsson · Sandviken, SE
Magnus Aspeby · Sandviken, SE

Key dates

Filing date	Jan 24, 1994
Grant date	Sep 5, 1995
Priority date	—
Expiry date	Jan 24, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T407/245
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A cutting insert, preferably for milling cutters, comprises an upper side or chip surface, a bottom surface and side surfaces extending between the upper and bottom surfaces. At least one of the side surfaces having a relief surface adjacent to a cutting edge, which relief surface is helically twisted along the cutting edge so that the relief or clearance angle decreases with increasing cutting depth. This arrangement makes it possible to obtain an equally large clearance along the cutting edge even with a negative inclination of the cutting insert in the milling cutter body.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.