Method and device for grinding central bearing positions on crankshafts

US6913522B2 · kind B2 · utility

Assignee

• Erwin Junker Maschinenfabrik GmbH · DE

Inventor

• Erwin Junker · Baden-Baden, DE

Key dates

• Filing date: Sep 10, 2002
• Grant date: Jul 5, 2005
• Expiry date: Sep 10, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24B5/421
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

An apparatus for grinding center bearings of crankshafts includes a clamping unit for clamping and driving a crankshaft; a grinding spindle, positionable perpendicular to the crankshaft; a plurality of grinding wheels on the grinding spindle, corresponding to the number of center bearings to be ground; a plurality of steadies, for supporting the crankshaft, opposite the grinding spindle; and an additional processing unit for performing preliminary grinding on the center bearing, by forming an elevated bearing seat for the steadies, opposite the bearing, such that the steadies are continuously guidable during grinding of the center bearings. In a method for grinding center bearings of a crankshaft using the apparatus, the center bearings are simultaneously ground using a multilayer grinding wheel set, and prior to a final grinding of the center bearings to their final dimensions, a bearing seat for a steady is ground on at least one center bearing.