Abstract
This article is about the implementation of an acquisition system for the measurement of micro-electro discharge machining process parameters and the statistical analysis of their influence on the process performance. The micro-electro discharge machining drilling of 316L stainless steel with copper tubular electrodes was studied and the exchanged power was taken into account as a comprehensive variable able to represent the effect of the peak current and voltage on the final result. The direct proportionality between the exchanged power and the nominal process parameters was verified. A linear and non-linear regression approach was used in order to obtain predictive equations for the most important aspects of micro-electro discharge machining process, such as the machining time and the electrode wear.
Highlights
The need for products containing micro-features has shown a noticeable and continuous growth in many fields of application, and within the different types of micro-feature, the need for products containing microholes has shown remarkable growth in some industrial sectors.[1]
Since microEDM involves the use of electrical discharges, it allows the machining of metals and all the conductive
In Yu et al.,[9] the authors carried out an experimental study in order to investigate the influence of the process parameters on the machining characteristics of micro-electro discharge machining (EDM)
Summary
The need for products containing micro-features has shown a noticeable and continuous growth in many fields of application, and within the different types of micro-feature, the need for products containing microholes has shown remarkable growth in some industrial sectors.[1]. In Yu et al.,[9] the authors carried out an experimental study in order to investigate the influence of the process parameters on the machining characteristics of micro-EDM They demonstrated the close relationship existing between the performance and the pulse energy, the dielectric, and the debris distribution. This aspect is significant if we consider that different actual conditions can occur using the same nominal parameters, due to minimal physical local differences of both the workpiece and electrode For this reason, a dedicated data acquisition system was implemented: the system is able to directly measure and to record the peak current and voltage signals during operation, to filter and analyze them in order to obtain reliable information about the micro-drilling process.
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