Study on the Optimum Cutting Parameters of an Aluminum Mold for Effective Bonding Strength of a PDMS Microfluidic Device

Yousuff, Caffiyar Mohamed; Danish, Mohd; Ho, Eric Tatt Wei; Basha, Ismail Hussain Kamal; Hamid, Nor Hisham

doi:10.3390/mi8080258

Cited by 30 publications

(19 citation statements)

References 43 publications

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“…In general, the use of the highest cutting speed and the lowest depth of cut are found to favor the improvement of the cut stack quality. Such findings have also been seen in the machining of other metals and alloys as reported in the literature [49,50].…”

Section: Machined Surface Qualitysupporting

confidence: 77%

Orthogonal cutting mechanisms of CFRP/Ti6Al4V stacks

Mansori

Chen

et al. 2019

Int J Adv Manuf Technol

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The enhanced mechanical/physical properties and improved functionalities have made the carbon fiber-reinforced polymer/ titanium alloy (CFRP/Ti6Al4V) stacks very attractive to the modern aerospace industry. However, the current knowledge of machining CFRP/Ti6Al4V stacks remains insufficient to guide their industrial applications. The main contribution of the present paper lies in the scientific understanding of the coupling effects and underlying mechanisms dominating the stack chip formation and cutting response transfer via the orthogonal cutting method. A particular focus was placed on the identification of the impact of different cutting sequence strategies (i.e., cutting from CFRP to Ti6Al4V and from Ti6Al4V to CFRP) on the stack machinability. The orthogonal cutting tests were carefully performed on a shaper machine tool using the polycrystalline diamond (PCD)-tipped inserts. The present study covers a variety of aspects in the CFRP/Ti6Al4V machining including the chip removal process, cutting forces, chip features, bouncing-back phenomenon and machined surface quality. The results discussed in this work allow for a better cutting understanding of CFRP/Ti6Al4V stacks and could advance the state of knowledge of the subject area.

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Section: Machined Surface Qualitysupporting

confidence: 77%

Orthogonal cutting mechanisms of CFRP/Ti6Al4V stacks

Mansori

Chen

et al. 2019

Int J Adv Manuf Technol

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“…an overhead spindle for securing and rotating the cutting tool. Modern mills employ computer numerical control (CNC) that automates the process to improve the repeatability and precision and reduce human error [27,28]. After the fabrication of mold, PDMS polymer mixed in a 10:1 ratio with the curing agent was casted on the aluminum master, degassed in a vacuum chamber, and baked in an oven for 2 h at 65 • C. Thereafter, PDMS was peeled off from the mold and bonded to a flat, thick PDMS layer using an Oxygen plasma unit (PDC-002, Harrick Plasma, Ossining, NY, USA).…”

Section: Device Fabricationmentioning

confidence: 99%

High-Throughput Particle Concentration Using Complex Cross-Section Microchannels

et al. 2020

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High throughput particle/cell concentration is crucial for a wide variety of biomedical, clinical, and environmental applications. In this work, we have proposed a passive spiral microfluidic concentrator with a complex cross-sectional shape, i.e., a combination of rectangle and trapezoid, for high separation efficiency and a confinement ratio less than 0.07. Particle focusing in our microfluidic system was observed in a single, tight focusing line, in which higher particle concentration is possible, as compared with simple rectangular or trapezoidal cross-sections with similar flow area. The sharper focusing stems from the confinement of Dean vortices in the trapezoidal region of the complex cross-section. To quantify this effect, we introduce a new parameter, complex focusing number or CFN, which is indicative of the enhancement of inertial focusing of particles in these channels. Three spiral microchannels with various widths of 400 µm, 500 µm, and 600 µm, with the corresponding CFNs of 4.3, 4.5, and 6, respectively, were used. The device with the total width of 600 µm was shown to have a separation efficiency of ~98%, and by recirculating, the output concentration of the sample was 500 times higher than the initial input. Finally, the investigation of results showed that the magnitude of CFN relies entirely on the microchannel geometry, and it is independent of the overall width of the channel cross-section. We envision that this concept of particle focusing through complex cross-sections will prove useful in paving the way towards more efficient inertial microfluidic devices.

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“…The respective solution is a cutting speed of 400 m/min, feed rate of 23.71 μm/rev and depth of cut of 25 microns. The optimum average surface roughness parameter is 0.50 µm, the optimum maximum height roughness parameter is 4.16 µm and optimum material removal rate is 239.03 mm 3 /min. The contour plot and ramp function plot respective to the optimum solution is shown in Figure 14 and 15, respectively.…”

Section: Optimization Of Surface Roughness Parameters and Materials Rementioning

confidence: 99%

“…The application of such manufacturing is delicate and requires the use of micro-turning and micro-milling processes. Notable industries are biomedical, defense, aerospace and electronics industries [3]. Though there is a large degree of similarity between traditional turning and micro-turning, turning at the micro scale needs to be accurate as well as precise, causing the necessity for ultra-precision machining [4].…”

Section: Introductionmentioning

confidence: 99%

Investigations on Surface Roughness and Tool Wear Characteristics in Micro-Turning of Ti-6Al-4V Alloy

et al. 2020

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Micro-turning is a micro-mechanical cutting method used to produce small diameter cylindrical parts. Since the diameter of the part is usually small, it may be a little difficult to improve the surface quality by a second operation, such as grinding. Therefore, it is important to obtain the good surface finish in micro turning process using the ideal cutting parameters. Here, the multi-objective optimization of micro-turning process parameters such as cutting speed, feed rate and depth of cut were performed by response surface method (RSM). Two important machining indices, such as surface roughness and material removal rate, were simultaneously optimized in the micro-turning of a Ti6Al4V alloy. Further, the scanning electron microscope (SEM) analysis was done on the cutting tools. The overall results depict that the feed rate is the prominent factor that significantly affects the responses in micro-turning operation. Moreover, the SEM results confirmed that abrasion and crater wear mechanism were observed during the micro-turning of a Ti6Al4V alloy.

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Study on the Optimum Cutting Parameters of an Aluminum Mold for Effective Bonding Strength of a PDMS Microfluidic Device

Cited by 30 publications

References 43 publications

Orthogonal cutting mechanisms of CFRP/Ti6Al4V stacks

Orthogonal cutting mechanisms of CFRP/Ti6Al4V stacks

High-Throughput Particle Concentration Using Complex Cross-Section Microchannels

Investigations on Surface Roughness and Tool Wear Characteristics in Micro-Turning of Ti-6Al-4V Alloy

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