Recent trends, opportunities and other aspects of micro-EDM for advanced manufacturing: a comprehensive review

Abstract

Micro-electrical discharge machining is an indispensable tool to manufacture the component or parts of components at the micro-level with reasonable accuracy and precision. This article reports a comprehensive overview of micro-EDM along with their recent trends and key challenges. The sparking phenomenon, physical principle of material removal, process capabilities and flexibility with the other machining process are discussed in the initial part of the paper. Major development issues associated with nano-EDM are reviewed, and suggested solutions are proposed. Research and technology gaps enabling the transition from micro-EDM to nano-EDM are examined. The impact of discharge power technology and dielectric circulation is explored. Moreover, this review article explores the sustainability of the system (micro-EDM) through green manufacturing. A state-of-the-art has been studied in various aspects of micro-EDM. The promising future research scope is also noted in micro-EDM as well as in nano-EDM based on the electrical discharge.

Research on micro-EDM discharge state detection technology based on inter-electrode impedance variation characteristics

“…Fig. 12 Hardware system architecture of impedance detection module STM32F103 is selected as the core chip of the detection system. 232 unit realizes the communication function between the detection system and the pulse control board, and obtains the power control parameters related to the pulse control board.…”

“…At present, the main technology methods that can be used for micro structure parts machining includes micro laser machining technology [4,5], micro milling technology [6,7], micro electrochemical machining technology [8], ion beam and electron beam machining technology [9], micro ultrasonic machining technology [10,11] and so on. Micro-EDM technology [12,13] has the advantages of no macro cutting force, non-contact, low requirements for tool strength and stiffness, wide application range of materials and can process deep micro holes and special-shaped cavity dies. It shows a good technical potential in the field of micro scale manufacturing, and is one of the effective means to solve the problem of micro manufacturing of difficult processing materials and micro scale structural parts.…”

Surface texturing of non-toxic, biocompatible titanium alloys via electro-discharge

“…In this process current, voltage, pulse duration, conductivity, polarity and dielectric medium are the significant factors effecting material removal rate (MRR) or machinability (Kumar. S, 2020, Kumar. D, 2020.…”

Experimental investigation on the performance variations of three different work piece materials in EDM with variation of thermo-physical properties

“…Yadav et al [19] compared the pongamia and jatropha dielectric medium with usual kerosene and claimed that due to the use of pongamia and jatropha, TWR was decreased, MRR was increased. Kumar et al [20] reported an overview of micro-EDM with key challenges and recent trends. They studied the gap between micro and nano-EDM.…”