Patent · US Active

Methods for increasing the fatigue life, of crankshafts

US8011096B2 · kind B2 · utility

8Cited by

2References

19Claims

0Family size

Assignee

MASCHINENFABRIK ALFING KESSLER GMBH

Inventors

Alfons Reeb · Aalen, DE
Jochen Schmidt · Trochtelfingen, DE
Alexis Boemcke · Dortmund, DE

Key dates

Filing date	Feb 5, 2005
Grant date	Sep 6, 2011
Priority date	—
Expiry date	Jul 13, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49863
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a method for increasing the bending strength and the endurance limit of crankshafts by locally restricted hammering in areas of high stress, such as grooves, the mouths of bores and cross-sectional transition zones, in which method pressure impulse machines or beating devices comprising heating tools are employed. The pressure impulse machines or beating devices only execute a relative displacement of the beating tool against the surface of the crankshaft segment to be processed when the compressive stress is introduced between the heating tool and said surface of the crankshaft segment to be processed. The invention also relates to a device for increasing the endurance limit of crankshafts.

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