Establishing the electrical discharges weight in electrochemical discharge drilling

Abstract

The electrochemical discharge machining (ECDM) offers an alternative to high technology equipments for drilling of small diameter holes in the case of difficult to machine materials. For a machining system based on the semidielectric liquid use and on the electric discharges initiated by contact break-out, the weight factor of the electrodes contact period is evaluated and the weight factor of the electrical discharges during this contact period is expressed. The paper presents some geometrical considerations which permit to conclude that the material removal rate depends on the characteristics of the motion and on some dimensions of the elements belonging to the crank mechanism. The influence of the input parameters on the axial electrode -tool wear and on the drilling speed is discussed.

Electrochemical discharge machining: A review on preceding and perspective research

“…They attempted to improve the machining accuracy using coaxial flushing of electrolyte. Later, machining of steel has been reported by several researchers; 68–74 observed axial tool wear rate (TWR) in machining of small holes on steel plate 68–72 and HAZ mechanism. 73,74 Coteata et al 68 studied drilling speed and axial TWR in machining of small holes on steel plate.…”

“…However, the use of large diameter tool electrode in ECDM experienced low TWR due to better heat dissipation. 69 On the contrary, Chavoshi and Behagh 71 studied axial TWR in ECDM and revealed that axial TWR is utmost influenced by voltage, capacitance as compared to other process parameters, that is, electrolyte density, tool electrode diameter. Furthermore, these results were aligned with the experimental observation reported by Huang et al 72 They studied effect of tool rotation speed, voltage and tool electrode diameter on axial TWR in drilling of small holes on stainless steel plate and concluded that voltage is dominant factor for the prediction of axial TWR.…”

Development and Manufacturing of Arduino Based Electrochemical Discharge Machine

“…The shaft rotary motion of the milling machine is converted in a linear alternative motion through a crank mechanism. The cathode was connected to the rod of the crank [30]. Coteata et al manufactured hybrid ECDM setup with passivating electrolyte and a rotating tool for drilling process [31].…”

Electrochemical discharge machining: A review

“…Spring-fed cylindrical hollow brass tool and spring-fed cylindrical abrasive tool were used to drill aluminium oxide (Al2O3). Coteate et al emphasized the effects of some parameters (the voltage, the electrode tool diameter and the work liquid density) on the electrode tool wear [24], the effects of the input parameters on the tool wear and on the drilling speed [25], the effects of the voltage, the capacity of electric circuit on tool wear [11]. They also designed, built and tested an in-house equipment on ECDD process with passivating electrolyte [26].…”