Precision and efficiency of laser assisted jet electrochemical machining

Pająk, P.; Silva, A.K.M. De; Harrison, David K.; McGeough, J. A.

doi:10.1016/j.precisioneng.2005.09.006

Cited by 100 publications

(60 citation statements)

References 11 publications

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“…Laser-assisted EJM [38][39][40][41] has been employed as a 'focussing' tool to enhance the conductivity at the centre of the electrolyte jet, through a localised temperature increase. This serves to normalise the effective current density outside of the central machining region to reduce overcut.…”

Section: Profile Fidelity Enhancementsmentioning

confidence: 99%

Transitory electrochemical masking for precision jet processing techniques

Mitchell-Smith

Speidel

Clare

2018

Journal of Manufacturing Processes

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a b s t r a c tElectrochemical jet processing techniques provide an efficient method for large area surface structuring and micro-milling, where the metallurgy of the near-surface is assured and not adversely affected by thermal loading. Here, doped electrolytes are specifically developed for jet techniques to exploit the Gaussian energy distribution as found in energy beam processes. This allows up to 26% reduction in dissolution kerf and enhancements of the defined precision metric of up to 284% when compared to standard electrolytes. This is achieved through the filtering of low energy at discrete points within the energy distribution curve. Two fundamental mechanisms of current filtering and refresh rate are proposed and investigated in order to underpin the performance enhancements found using this methodology. This study aims to demonstrate that a step change in process fidelity and flexibility can be achieved through optimisation of the electrochemistry specific to jet processes.

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Section: Profile Fidelity Enhancementsmentioning

confidence: 99%

Transitory electrochemical masking for precision jet processing techniques

Mitchell-Smith

Speidel

Clare

2018

Journal of Manufacturing Processes

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“…[28][29][30][31][32][33][34][35][36][37][38][39][82][83][84][85][86][87][88][89][90][91] The University of Edinburgh, Glasgow Caledonian University, and Philips Dap BV reported hybrid systems that combine focused laser beams for drilling and a jet electrolyte for machining together, as shown in Fig. 8.…”

Section: Subtractive/assistivementioning

confidence: 99%

“…8. [28][29][30]82 The main purpose of this hybrid processes is to improve of the precision and machining efficiency. Using this process, an improvement in precision of 38-65% compare with laser only process was reported, and the volumetric removal rate was increased by 54%.…”

Section: Subtractive/assistivementioning

confidence: 99%

Hybrid manufacturing in micro/nano scale: A Review

Chu

Kim

Lee

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

156

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In this paper, a total of 57 micro and nano scale hybrid manufacturing processes are reviewed. These processes are categorized in terms of process timing and process type. Process timing is one of the most important aspects of manufacturing, and three different process schemes -concurrent, main/assistive (M/S) separate, and main/main (M/M) separate -are considered. The process type is categorized as either geometrically additive or subtractive, and all hybrid processes are categorized into combinations of additive, subtractive, and assistive process. Features and advantages are described for each of these classifications. Machining is found to be the most common process for both micro and nano-scale hybrid manufacturing. Of micro scale hybrid manufacturing schemes, 74.4% use assistive processes as a secondary process because the main purpose of most micro scale hybrid manufacturing is to improve the quality of the process. In nano scale manufacturing, 61.5% of hybrid manufacturing schemes employ assistive processes, since these processes typically focus on the fabrication of parts that are difficult to fabricate using a single, existing process. Based on a summary of published work, future trends in hybrid manufacturing at the micro and nano scale are suggested.

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“…In the experiment by Pajak et al (2006) and De Silva et al (2011), a laser beam was coaxially aligned with an electrolyte jet creating a non-contact tool-electrode, in which case the dissolution in the localised zone was intensified (Kozak and Oczos, 2001). Consequently, the material removal rate increased and furthermore, the localisation enhanced machining accuracy by reducing stray machining action (De Silva et al, 2004).…”

Section: Laser Assisted Ecmmentioning

confidence: 99%

A review of hybrid manufacturing processes – state of the art and future perspectives

Zhu

Dhokia

Nassehi

et al. 2013

International Journal of Computer Integrated Manufacturing

253

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Today, hybrid manufacturing technology has drawn significant interests from both academia and industry due to the capability to make products in a more efficient and productive way. Although there is no specific consensus on the definition of the term 'hybrid processes', researchers have explored a number of approaches to combine different manufacturing processes with the similar objectives of improving surface integrity, increasing material removal rate, reducing tool wear, reducing production time and extending application areas. Thus, hybrid processes open up new opportunities and applications for manufacturing various components which are not able to be produced economically by processes on their own. This review paper starts with the classification of current manufacturing processes based on processes being defined as additive, subtractive, transformative, joining and dividing. Definitions of hybrid processes from other researchers in the literature are then introduced. The major part of this paper reviews existing hybrid processes reported over the past two decades. Finally, this paper attempts to propose possible definitions of hybrid processes along with the authors' classification, followed by discussion of their developments, limitations and future research needs.

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Precision and efficiency of laser assisted jet electrochemical machining

Cited by 100 publications

References 11 publications

Transitory electrochemical masking for precision jet processing techniques

Transitory electrochemical masking for precision jet processing techniques

Hybrid manufacturing in micro/nano scale: A Review

A review of hybrid manufacturing processes – state of the art and future perspectives

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