Laminated manufacturing and milling electrical discharge dressing of metal-bonded diamond grinding wheels

Abstract

Metal-bonded diamond wheels are widely used in high-precision grinding of hard and brittle materials; unfortunately, they are difficult to true and dress. This paper addresses this problem in that it proposes a variation on the electrical discharge dressing technique. The advantages of the proposed method are discussed and an electrode compensation model is formulated. The topography and surface profile of the diamond wheel are analysed as a function of various dressing parameters. The performance of the wheel after dressing is evaluated using experimentally measured grinding forces and surface roughness values. It is shown that the proposed method is a viable technique for the truing and dressing of diamond grinding wheels.

Grinding and Dressing Tools for Precision Machines

“…The principle of noncontact electrical discharge dressing is schematically illustrated in Fig. 16 (Xu et al 2012). Just like the electrical discharge machining, a voltage is applied between the tool electrode and the grinding wheel that closely immersed inside a tank full of dielectric medium.…”

“…Contact discharge dressing is a very efficient method for metal bond grinding wheels, but due to the periodicity of the discharge, the periodic discharge grooves are The process involved in EDD a metal-bonded diamond grinding wheel (Xu et al 2012) easy to be produced on the surface of the dressed grinding wheel, which may affect the accuracy of dressed grinding wheel (Guo et al 2010). In order to evenly distribute the sharpened blade edges on the grinding wheel, the bipolar chip electrode assembly is used to insert into the resin bond cup wheel and form a mixed electrode as shown in Fig.…”

Determination of process parameters for microchannel fabrication by microelectro-discharge machining

“…Micro-EDM (µEDM) has the capability of producing complex geometries in hard materials such as polycrystalline diamond cutting tools 3 and dressing of metal-bonded diamond grinding wheels. 4 Micromachining of ferrous metals by conventional methods is hindered by the chemical affinity of diamond tools and carbon, which leads to excessive wear and premature failure of tools. 5 This is not an issue with µEDM.…”

Experimental Investigation on Bronze-Bonded CBN Formed Grinding Wheel by Means of Electro-Discharging Dressing

“…Then many scholars have done many efforts on achieving EDD technology over the following years. This technique has been studied and widely applied in the field of diamond grinding wheel dressing [4][5][6]. Meanwhile, the selections of electrodes [7], dielectric medium [8] and electrical parameters [9] have been discussed.…”