Patent · US Expired

Bending block for a bending device

US6658912B1 · kind B1 · utility

2Cited by

3References

11Claims

0Family size

Assignee

THYSSEN KRUPP STAHL AG · DE

Inventors

Thomas Flehmig · Ratingen, DE
Uwe Kneiphoff · Dinslaken, DE
Klaus Blümel · Dinslaken, DE
Klaus Göhler · Grimma, DE

Key dates

Filing date	Feb 27, 2002
Grant date	Dec 9, 2003
Priority date	—
Expiry date	Mar 1, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21D9/03
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a bending mandrel for a bending device and also to a bending method for pipes, more particularly pipes which have a large diameter-to-wall thickness ratio and are to be bent by a small radius, for example, of the order of magnitude of the pipe diameter. To this end use is made of a bending mandrel (5, 6) to whose rigid head (5) assembly (6) of springy sheet metal lamellae (6a, 6b) is attached to improve the bendability of the bending mandrel (5, 6) while maintaining a satisfactory supporting action, the lamellae (6a), with the exception of the outer lamellae (6b), having window-like cutaway portions (6c).

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