A study on the removal of infinitesimal particles on a wall by high-speed air jet―Measurements of adhesive force and particle removal rate―

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration of machining High-speed steel (HSS)/(M2) on the material removal rate (MRR), tool wear rate (TWR) and the surface roughness (Ra). Experiments have been designed and analyzed using Response Surface Methodology (RSM) approach by adopting a face-centered central composite design (FCCD). It is found that added graphite-silicon carbide mixing powder to the dielectric fluid enhanced the MRR and Ra as well as reduced the TWR at various conditions. Maximum MRR was (0.492 g/min) obtained at a peak current of (24 A), pulse on (100 µs), and powder concentration (10 g/l), minimum TWR was (0.00126 g/min) at (10 A, 100 µs, and 10 g/l), and better Ra was (3.51 µm) at (10 A, 50 µs, and 10 g/l).

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Enhancement of EDM Performance by Using Copper-Silver Composite Electrode

Engineering and Technology Journal ◽

10.30684/etj.v38i9a.1549 ◽

2020 ◽

Vol 38 (9A) ◽

pp. 1352-1358

Author(s):

Saad K. Shather ◽

Abbas A. Ibrahim ◽

Zainab H. Mohsein ◽

Omar H. Hassoon

Keyword(s):

Surface Roughness ◽

Material Removal Rate ◽

Material Removal ◽

High Speed ◽

Composite Electrode ◽

Removal Rate ◽

Pure Copper ◽

High Speed Steel ◽

Pulse On Time ◽

Pulse Off Time

Discharge Machining is a non-traditional machining technique and usually applied for hard metals and complex shapes that difficult to machining in the traditional cutting process. This process depends on different parameters that can affect the material removal rate and surface roughness. The electrode material is one of the important parameters in Electro –Discharge Machining (EDM). In this paper, the experimental work carried out by using a composite material electrode and the workpiece material from a high-speed steel plate. The cutting conditions: current (10 Amps, 12 Amps, 14 Amps), pulse on time (100 µs, 150 µs, 200 µs), pulse off time 25 µs, casting technique has been carried out to prepare the composite electrodes copper-sliver. The experimental results showed that Copper-Sliver (weight ratio70:30) gives better results than commonly electrode copper, Material Removal Rate (MRR) Copper-Sliver composite electrode reach to 0.225 gm/min higher than the pure Copper electrode. The lower value of the tool wear rate achieved with the composite electrode is 0.0001 gm/min. The surface roughness of the workpiece improved with a composite electrode compared with the pure electrode.

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Effect of Machining Parameters and Wear Mechanism in Milling Mold Steel AISI-P20 and AISI-1050

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.590.294 ◽

2014 ◽

Vol 590 ◽

pp. 294-298

Author(s):

Pichai Janmanee ◽

Somchai Wonthaisong ◽

Dollathum Araganont

Keyword(s):

Wear Mechanism ◽

Feed Rate ◽

High Speed ◽

Removal Rate ◽

Milling Process ◽

Depth Of Cut ◽

Machining Parameters ◽

Aisi P20 ◽

Steel Aisi ◽

Quality Surface

In this study, effect of machining parameters and wear mechanism in milling process of mold steel AISI-P20 and AISI-1050, using 10 mm twin flute type end mill diameter. The experimental results found that characteristics of milling surfaces and wear of the mill end were directly influenced by changes of parameters for all test conditions. As a result, the quality of milling surfaces also changed. However, mould steels which had the good quality surface is AISI-1050, with roughnesses of 2.120 μm. Quality milling surfaces were milled by using the most suitable parameter feed rate of 45 mm/min, a spindle speed of 637 rpm and a cut depth level of 3 mm, for both grades. Moreover, material removal rate and duration of the milling process, the milling end mills affect wear of the edge in every bite when the feed rate is low, high speed and level depth of cut at least. It was found that limited wear less will affect the surface roughness (Ra) represents the good quality surface.

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Removal of fine particles on a solid surface using high speed air jet.

Journal of the Society of Powder Technology Japan ◽

10.4164/sptj.33.597 ◽

1996 ◽

Vol 33 (7) ◽

pp. 597-598

Author(s):

Kuniaki GOTOH

Keyword(s):

Solid Surface ◽

High Speed ◽

Fine Particles ◽

Air Jet

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Spectral characteristics of optical discharge in a high-speed methane–air jet

Technical Physics Letters ◽

10.1134/s1063785017060281 ◽

2017 ◽

Vol 43 (6) ◽

pp. 551-553

Author(s):

V. N. Zudov

Keyword(s):

High Speed ◽

Spectral Characteristics ◽

Optical Discharge ◽

Air Jet

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Investigation of Surface Roughness and Material Removal Rate for High Speed Micro End Milling on PMMA

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1115.12 ◽

2015 ◽

Vol 1115 ◽

pp. 12-15

Author(s):

Nur Atiqah ◽

Mohammad Yeakub Ali ◽

Abdul Rahman Mohamed ◽

Md. Sazzad Hossein Chowdhury

Keyword(s):

Surface Roughness ◽

Material Removal Rate ◽

Feed Rate ◽

Material Removal ◽

High Speed ◽

End Milling ◽

Removal Rate ◽

Spindle Speed ◽

Depth Of Cut ◽

Micro End Milling

Micro end milling is one of the most important micromachining process and widely used for producing miniaturized components with high accuracy and surface finish. This paper present the influence of three micro end milling process parameters; spindle speed, feed rate, and depth of cut on surface roughness (Ra) and material removal rate (MRR). The machining was performed using multi-process micro machine tools (DT-110 Mikrotools Inc., Singapore) with poly methyl methacrylate (PMMA) as the workpiece and tungsten carbide as its tool. To develop the mathematical model for the responses in high speed micro end milling machining, Taguchi design has been used to design the experiment by using the orthogonal array of three levels L18 (21×37). The developed models were used for multiple response optimizations by desirability function approach to obtain minimum Ra and maximum MRR. The optimized values of Ra and MRR were 128.24 nm, and 0.0463 mg/min, respectively obtained at spindle speed of 30000 rpm, feed rate of 2.65 mm/min, and depth of cut of 40 μm. The analysis of variance revealed that spindle speeds are the most influential parameters on Ra. The optimization of MRR is mostly influence by feed rate. Keywords:Micromilling,surfaceroughness,MRR,PMMA

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