Abrasive waterjet micro-machining of channels in metals: Comparison between machining in air and submerged in water

Haghbin, Naser; Spelt, J.K.; Papini, M.

doi:10.1016/j.ijmachtools.2014.09.012

Cited by 93 publications

(57 citation statements)

References 17 publications

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“…Recent developments in miniaturization particularly in miniaturized nozzles lead the water jet machining to realize the fabrication of micro-channels on variety of materials. Similarly, the abrasive water jet technology can be utilized for the purpose of micro-milling [5]. Abrasive particles in the form of a slurry have also been used to fabricate the microchannels and micro-holes through the machining process termed as abrasive slurry jet machining (ASJM).…”

Section: Introductionmentioning

confidence: 99%

A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

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Micro-channels have been fabricated in nickelbased superalloy (Inconel 718) through laser beam machining (LBM). Two machining mediums are employed: dry and wet medium. Under the dry medium, laser beam passes through air prior to strike with target surface while under wet medium, the laser beam first travels through a layer of distilled water and reaches the substrate after. For both the machining environments, effects of laser power, pulse repetition rate, and laser scan speed on machined channels' width, depth, and taperness are investigated. A comparison of parametric effects on machined channels' profiles has been carried out for the said machining conditions. The results reveal that LBM under distilled water is more productive than LBM under air environment. In one step, wet machining conditions allow to generate a set of two microchannels, and dry conditions generate one micro-channel. Further, to achieve the optimum dimensions of micro-channels, the appropriate level of each of the investigated laser parameter is proposed.

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Section: Introductionmentioning

confidence: 99%

A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

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“…The effective diameter of the slurry jet, d j , was determined (Fig. 4b) by measuring the width of slots cut through a high-density 3-mm-thick foam board (Renshape, Huntsman Advanced Materials) with a traverse velocity of V t =1000 mm/min as explained in detail in Haghbin et al [15]. As Fig.…”

Section: Resultsmentioning

confidence: 99%

High pressure abrasive slurry jet micro-machining using slurry entrainment

Haghbin

Ahmadzadeh

Spelt

et al. 2015

Int J Adv Manuf Technol

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A novel high-pressure (water pump pressure up to 250 MPa) abrasive slurry micro-machining (HASJM) system was introduced. By feeding a premixed slurry into the mixing chamber of a water jet machine with a micro-nozzle (mixing tube diameter of 254 μm), premature erosion of system components was avoided. An optimum erosion rate of 2.7 mg/g was reached when machining Al6061-T6 with a slurry of 25 μm aluminum oxide particles under conditions (slurry flow rate=200 g/min and water pump pressure=235 MPa) near to those which theoretically maximized momentum transfer between the inlet slurry and the water jet entering the mixing chamber from the orifice. It was found that when the standoff distance increased tenfold, the erosion rate almost doubled in glass, but decreased by 50 % in Al6061-T6, due to differences in the erosion at the jet periphery for the two materials. For aspect ratios greater than 0.9, high-quality symmetric channels with a centerline waviness below 6.9 μm and a centerline roughness below 1.1 μm could be produced using a single pass at a low traverse velocity of 40 mm/min. The use of multiple machining passes at a relatively high traverse speed (~1000 mm/min) was found to produce asymmetric channels when the aspect ratio was greater than 0.9, owing to jet deflection from steps formed on the cutting front. Channels produced by micro-milling Al6061-T6 and glass had a 50 % lower centerline waviness and 16 % lower centerline roughness than those made with the conventional abrasive water jet in which air and abrasive entered the mixing chamber.

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“…Recently, Abrasive Water Jet Machining (AWJM) has received considerable attention from industries owing to its beneficial characteristics in machining various materials, particularly difficult-to-machine and thermally sensitive materials [2]. AWJM uses the mechanical energy of the high velocity jet of water and abrasive to achieve material removal by impact erosion.…”

Section: Introductionmentioning

confidence: 99%

“…In abrasive water jet pocket milling (AWJPM), the waterjet is not allowed to pass all the way through the workpiece. The advantages of AWJPM are less burr information, minium thermal distortion, negligible tool wear, absence of tool breakage and tool deflection [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on pocket milling of titanium alloy using abrasive water jet machining

Kanthababu¹,

Ram²,

Emannuel³

et al. 2016

FME Transaction

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Abrasive waterjet micro-machining of channels in metals: Comparison between machining in air and submerged in water

Cited by 93 publications

References 17 publications

A comparison of laser beam machining of micro-channels under dry and wet mediums

A comparison of laser beam machining of micro-channels under dry and wet mediums

High pressure abrasive slurry jet micro-machining using slurry entrainment

Experimental investigations on pocket milling of titanium alloy using abrasive water jet machining

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