Patent · US Active

Cutting tool

US8042442B2 · kind B2 · utility

0Cited by

21References

16Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Robert KIRSCHNER · Olching, DE
Roland Hemper · Tutzing, DE

Key dates

Filing date	Feb 1, 2005
Grant date	Oct 25, 2011
Priority date	—
Expiry date	Nov 26, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T83/9452
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A cutting tool, particularly for steel sheet billets, having a cutting blade fastened to a blade holder and a pressure cushion which is arranged on sides of the blade holder and, when the cutting blade penetrates into the material to be punched, is pressed onto the latter in the area of the useful punched part. During the passage of the cutting blade, a high-quality edge of the useful punched part is largely kept free of an interfering burr and elevation formation by the pressure cushion material being displaced radially outward during the punching stroke, such that the cutting blade is acted upon by pressure in the lateral direction under an increasing elastic deflection of the cutting blade edge.

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