https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1275&context=mechengfacpub

Review of Electrochemical and Electrodischarge Machining

Film cooling holes are widely used in the aerospace industry, and their fabrication requires high machining speed and accuracy, as well as good surface quality. Tube electrode high-speed electrochemical discharge drilling (TSECDD) is a promising hybrid machining method for the fabrication of film cooling holes in difficult-to-machine superalloys. An electrochemical reaction can occur if a low-conductivity salt solution is used in the drilling. Materials can also be removed at a high speed using electrical discharge machining (EDM). Thus, TSECDD and electrochemical machining (ECM) can be combined into a unique machining process using a low-conductivity salt solution. This machining process achieves both a high machining speed and good surface finish. In this study, the material removal mechanism of TSECDD was studied using a low-conductivity salt solution, and comparisons with high-speed electrical discharge drilling were made. The performance of the process was investigated using salt solutions of various conductivities. The results show that there are different material removal mechanisms in the frontal gap and the lateral gap and that, in the latter, there is a transition from EDM to ECM. Experiments conducted using TSECDD confirm that the use of this process with a low-conductivity salt solution can improve the machining surface and machining efficiency achieved. The results also show that the use of a low-conductivity solution improves the material removal rate, the hole diameter, and the taper angle.

Tube electrode high-speed electrochemical discharge drilling using low-conductivity salt solution

Electrical discharge machining has emerged as one of the most accepted non-traditional machining methods that have the capability of attaining complex shapes and better feature size in difficult-to...

Micro-electrical discharge machining of difficult-to-machine materials: A review:

Technology development has led to the need of micro and miniaturized products in the field of automobile, aerospace, electronics, medical implants, biomedicine, robotics, and so on. Micromachining is the key technology to satisfy the need of the industry in terms of functionality and miniaturization in size. In this article, state-of-the-art review on tool-based micromachining processes such as microturning, microdrilling, micromilling, electric discharge micromachining (Micro-EDM), and electrochemical micromachining (Micro-ECM) has been carried out. The review begins with an overview of micromachining, classifications, and discussions about different aspects of tool-based micromachining processes. The research works carried out for the past 10 years are analyzed in terms of materials perspective, process parameters, size effects, performance characteristics, condition monitoring, product development, micro features generation, and fabrication of micro tools. A statistical analysis has been performed with...

A Review on Current Research Aspects in Tool-Based Micromachining Processes

Electric discharge machining (EDM) is a material removal process that is especially useful for difficult-to-cut materials with complex shapes and is widely used in aerospace, automotive, surgical tools among other fields. EDM is one of the most efficient manufacturing processes and is used to achieve highly accurate production. It is a non-contact thermal energy process used to machine electrically conductive components irrespective of the material’s mechanical properties. Studies related to the EDM have shown that the process performance can be considerably improved by properly selecting the process material and operating parameters. This paper reviews research studies on the application of EDM to different grades of stainless steel materials and describes experimental and theoretical studies of EDM that have attempted to improve the process performance, by considering material removal rate, surface quality and tool wear rate, amongst others. In addition, this paper examines evaluation models and techniques used to determine the EDM process conditions. This review also presents a discussion on developments in EDM and outlines the likely trend for future research.

Advanced Electric Discharge Machining of Stainless Steels: Assessment of the State of the Art, Gaps and Future Prospect.

Micro-electrical discharge machining (EDM) and micro-electrochemical machining (ECM) combined milling for 3D micro-structure is investigated in this paper. These processes that consist of micro-EDM shaping and micro-ECM finishing are carried out in sequence on the same machine tool with the same electrode but different dielectric medium. The processing conditions are investigated experimentally by the cavity milling. The electrode which was used both in micro-EDM and micro-ECM processes is online fabricated by using an anti-copying block. The EDMed surface roughness of 0.707 μm Ra is lowered to 0.143 μm Ra by applying micro-ECM finishing. Meanwhile, the size and shape of the workpiece by combined milling is controlled precisely, which is much better than that machined merely by micro-ECM. As the large machining parameter values, the machining efficiency is also improved. In order to verify the combined machining performance, some 3D micro-structures were fabricated. The results show that the machining precision and shape accuracy is much better than that machined merely by micro-ECM milling, which can be exactly controlled. Since the EDMed recast layer and surface defects are removed completely, the surface quality and mechanical property of the workpiece is improved, which is better than that machined merely by micro-EDM. It proves that this combined milling method is possible and useful in the field of 3D metallic micro-structure milling.

A study of micro-EDM and micro-ECM combined milling for 3D metallic micro-structures

Electric spark and electrochemical composite machining method of micro-electrode

The invention discloses an on-line preparation method of a side wall insulated micro tool electrode based on micro-arc oxidation, belongs to the field of micro special machining, and aims to solve the problem of poor precision of the micro machining caused by the need of the conventional side wall insulated electrode off-line preparation method for secondary clamping. The method is realized based on an on-line preparation device of the micro-arc oxidized side wall insulated micro tool electrode. Firstly, a blank of the tool electrode is fixedly arranged at the lower end of a Z shaft of a bed; a reverse copying block is connected with a power signal output end of a high-frequency pulse power supply; the Z shaft of a machine tool rotates at a high speed to perform electrical discharge on-line grinding on a block electrode with the tool electrode blank; then the side wall of the tool electrode is subjected to micro-arc oxidation on-line insulation preparation; an insulating ceramic film is oxidized on the outer surface of the tool electrode blank; on-line preparation of the micro-arc oxidized side wall insulated micro tool electrode is realized. The method is applicable to on-line preparation of the tool electrode.

On-line preparation method of side wall insulated micro tool electrode based on micro-arc oxidation

The invention discloses a self-induced electric discharge machining method of a metal-ceramic functionally graded material, relates to a machining method of a metal-ceramic functionally graded material and solves the problems that: the traditional mechanical machining method depending on the strength and the hardness of a tool is difficult to realize the re-machining of the metal-ceramic functionally graded material. The machining method comprises the following steps that: firstly, the metal-ceramic functionally graded material and a tool electrode are respectively connected with positive andnegative electrodes of a pulse power supply, and then a workpiece is immersed in a kerosene working liquid; and secondly, a feed mechanism is used for driving the tool electrode to approach the workpiece, and the pulse power supply is connected so as to gradually complete the discharge machining of a meal layer, a gradient layer and a ceramic layer. According to the self-induced electric discharge machining method of the metal-ceramic functionally graded material, without the aid of an auxiliary electrode, a metal matrix of the material itself is used as a self-induced source of ceramic machining, so that the stability and the continuity of the self-induced discharge process are ensured, the connotation of the electric discharge machining technology is enriched, and simultaneously, the application of novel materials is promoted. The self-induced electric discharge machining method provided by the invention is used for machining the metal-ceramic functionally graded material.

Self-induced electric discharge machining method of metal-ceramic functionally graded material

The invention discloses a bipolar electrode device for electric spark hole machining for an insulating ceramic material, which relates to the field of machining, and aims at solving the problems of incapacity of continuously machining and bad stability of the existing material electric spark hole machining for insulating ceramics. According to the bipolar electrode device disclosed by the invention, insulating ceramic machining is realized by virtue of spark discharge between bipolar electrodes, and hole machining can be carried out on various insulating ceramics difficult to machine; during a hole machining process for insulating ceramics, due to the periodic polar conversion of the bipolar electrodes I and II, the two bipolar electrodes are equal in loss, and continuous electric spark hole machining for insulating ceramics is realized; moreover, the bipolar electrode device disclosed by the invention is simple in structure and stable in working, and the stability is increased by 20% on year-on-year basis. The bipolar electrode device disclosed by the invention is suitable for the field of machining.

Bipolar electrode device for electric spark hole machining for insulating ceramic material

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Xiaolong He

Author Tools

Chat about Author