Patent · US Active

Multiple edge drill

US9004825B2 · kind B2 · utility

7Cited by

15References

18Claims

0Family size

Assignee

Guehring OHG · DE

Inventor

Jochen Gruber · Sigmaringen, DE

Key dates

Filing date	Dec 28, 2010
Grant date	Apr 14, 2015
Priority date	—
Expiry date	Feb 12, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9097
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a multiple edge drill such as is especially used for machining difficult-to-machine, e.g. high-toughness materials, such as e.g. cast steel, steel for hardening and tempering or other difficult-to-machine steel materials including metallic cast materials, such as e.g. gray cast iron, and especially GGV or ADI cast iron. The facet is designed in such a manner that the main cutting edge has at least two main cutting edge sections that define point angles of different size, the radially outer point angle being smaller than the radially inner one, thereby obtaining a good cutting behavior and long service life of the tool.

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