Investigation of Electro-Discharge Mechanical Dressing (EDMD) of Diamond Abrasive Wheels with Conductive Bonds Using Brush Electrodes

Abstract

The authors have presented a new method of electro-discharge mechanical dressing of ultra-hard abrasive tools with metal bonds in which brush electrodes were used. This kind of machining is denoted as EDMD (electro-discharge mechanical dressing) and combines features of electro-discharge machining with mechanical treatment so that thin layers of the bond are removed. Moreover, the brush electrode offers the additional possibility of introducing the advantageous (having the anchorage of the abrasive grains in mind) state of compressive stress and strain hardening of the outer layer of the bond.

Analysis of mechanical effects of wire electrodes in micralloyoing process using electrical discharge

“…W zależnosci od warunków prowadzenia procesu włókna oddziałowywują na powierzchnię poprzez wyładowania elektryczne i przenoszenie masy z katody do anody [6,7]. W innych przypadkach druciki wywieraja na powierzchnie nacisk w połączeniu z przepływającym prądem -mamy wtedy do czynienia z oddzaływaniami elektromechanicznymi [7,12].…”

Influence of the of electrical discharge alloying methods on the surface quality of carbon steel

“…One of them is electrical discharge alloying [6,10], which can be performed using different tool electrodes, e.g. a rotary disc brush, a vibrating rod and a monolithic electrode practically of any shape.…”

Electrical discharge dressing metal-bonded diamond grinding wheels with various mediums

“…They show many important advantages compared with conventional SiC grinding wheels, such as high grinding efficiency, long working life, low grinding forces, ideal surface quality, and wear-resistant ability. 1,2 However, it is very difficult to true and dress (T/D) superabrasive grinding wheels because superabrasive grit is one of the highest hardness materials, and the geometry tolerance requirement of grinding wheel is very strict. 3 Mechanical T/D methods with single-tip diamond tool or SiC wheel show obvious disadvantages involving poor wear resistance of the T/D tool, high working force, and insufficient grinding chip cavities.…”