Method and apparatus for grinding cams with concave sides

US5899797A · kind A · utility

Inventor

• Erwin Junker · Baden-Baden, DE

Key dates

• Filing date: Jan 23, 1997
• Grant date: May 4, 1999
• Expiry date: Jan 23, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24B19/12
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A grinding machine includes a bed, structure for supporting a camshaft on the bed, a carriage displaceably mounted on the bed to permit movement relative to the camshaft in a radial direction of the camshaft, first and second grinding spindles respectively having a rough-grinding disc and a finish-grinding disc, a headstock having the first and second grinding spindles mounted therein and the first and second grinding spindles respectively having first and second spindle axes aligned to intersect each other at an angle. The second grinding spindle also has a third grinding which has a third diameter smaller than a first diameter of the rough-grinding disc, greater than a second diameter of the finish-grinding disc and equal to substantially twice a concavity radius and of a cam to be ground and a width narrower than a cam width. A method of grinding the cam includes first rough grinding the cam from an untreated configuration using the rough-grinding disc to an intermediate configuration using the rough-grinding disc, then rough grinding the cam to a modified intermediate configuration using the third grinding disc, wherein the modified intermediate configuration defines a concave …