Technical model of micro Electrical Discharge Machining (EDM) milling suitable for bottom grooved micromixer design optimization

Sabotin, Izidor (author), Tristo, Gianluca (author), Valentinčič, Joško (author)

In this paper, development of a technical model of micro Electrical Discharge Machining in milling configuration (EDM milling) is presented. The input to the model is a parametrically presented feature geometry and the output is a feature machining time. To model key factors influencing feature machining time, an experimental campaign by machining various microgrooves into corrosive resistant steel was executed. The following parameters were investigated: electrode dressing time, material removal rate, electrode wear, electrode wear control time and machining strategy. The technology data and knowledge base were constructed using data obtained experimentally. The model is applicable for groove-like features, commonly applied in bottom grooved micromixers (BGMs), with widths from 40 to 120 µm and depths up to 100 µm. The optimization of a BGM geometry is presented as a case study of the model usage. The mixing performances of various micromixer designs, compliant with micro EDM milling technology, were evaluated using computational fluid dynamics modelling. The results show that slanted groove micromixer is a favourable design to be implemented when micro EDM milling technology is applied. The presented technical model provides an efficient design optimization tool and, thus, aims to be used by a microfluidic design engineer.

• Language: English
• Keywords: micromachining, micro EDM milling, empirical modelling, micromixer, design for manufacturing, computational fluid dynamics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 20 str.
• Numbering: Vol. 11, iss. 6, art. 594
• PID: 20.500.12556/RUL-127109
• UDC: 519.6:532(045)
• ISSN on article: 2072-666X
• DOI: 10.3390/mi11060594
• COBISS.SI-ID: 20114691
• Publication date in RUL: 18.05.2021

Record is a part of a journal

• Title: Micromachines
• Shortened title: Micromachines
• Publisher: Multidisciplinary Digital Publishing Institute (MDPI)
• ISSN: 2072-666X
• COBISS.SI-ID: 523276825

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 16.06.2020

Secondary language

• Language: Slovenian
• Keywords: mikroizdelava, mikro elektroerozijsko dolbenje, empirično modeliranje, mikromešalnik, dizajn za izdelavo, numerična analiza dinamike tekočin

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0248
• Name: Inovativni izdelovalni sistemi in procesi

• Funder: EC - European Commission
• Funding programme: H2020
• Project number: 811040
• Name: Chair Of Micro Process Engineering and TEchnology
• Acronym: COMPETE