On-Machine Trueing/Dressing of Metal Bond Grinding Wheels by Electro-Discharge Machining

Abstract

This paper describes a newly proposed method for carrying out effective and precise trueing and dressing of metal bond grinding wheels on an NC grinding machine or a machining center by utilizing wire or die sinking electro-discharge machining(EDM). The main feature of this method is that a staple ED unit is mounted on the NC table of the grinding machine. Thereby trueing for eliminating the eccentricity of wheels and for generating or correcting profiled wheels is carried out by the help of NC movement of the table, keeping the grinding wheel on a machine spindle. In order to prevent the influence of wear of a block electrode in die sinking EDM, another new method is proposed for shaping or correcting the form of the electrode with a cutting tool on the grinding machine by the help of NC movement of the table. The superior effects of the proposed methods have been confirmed in the case of grinding of ceramic material with cast iron fiber bond diamond wheels.