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Thermal and tool wear characterization of graphene oxide coated through magnetorheological fluids on cemented carbide tool inserts

Thiyagu M., Karunamoorthy L., Arunkumar N.

Archives of Civil and Mechanical Engineering

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2019

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Vol. 19, no. 4

1043--1055

EN

The proposed work is about the investigation of nano-textured tool insert with magnetor-heological-based graphene coating process. The comparative study on nano-textured car-bide insert with unpolished one for turning duplex stainless steel (S31803/2205) is made by conducting number of experiments with Box–Behnken design using response surface methodology. An array of sensor based on the conductive element of chromel and alumel core integrated through DC magnetron sputtering on the rake surface of the tool insert. The performance of the proposed sensor was evaluated from the obtained thermo-electromotive force on tool chip contact interference and the temperature measurements taken at the contours of multiple points with respect to the tool wear. Results obtained clarify that with the rise in cutting tool temperature leads to the rise in tool wear based on the adhesion and abrasion. It has been found that the graphene coated tool inserts provides high wearable resistances with flank wear of 0.298 mm at 21st pass. The cutting tool temperature is found to spread uniformly with a value of 202 8C for graphene coated inserts for cutting speed of 55 m/min. Microstructural images taken proved that the formation of cementite and carbides with inter metallic compounds (IMCs) produced during the tool chip interface leads to the strengthening of tool tip in reducing the tool-wear. Also the occurrence of ultrafine grain boundaries on the tool tip occurs increasing the formation of covalent bonds in providing the robust resistance against tool wears.

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Dłutak modułowy z ostrzami o bocznych powierzchniach przyłożenia ukształtowanych promieniem

Wieczorowski K., Siecla R.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2008

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z. 75 [259]

243-253

PL

W pracy przedstawiono koncepcję konstrukcji dłutaków z ostrzami ukształtowanymi promieniem na bocznych powierzchniach przyłożenia. Omówiono problem kształtowania zarysu krawędzi skrawającej ostrza dłutaka oraz wskazano na możliwości wykonawcze noży tego typu. Podano sposób ukształtowania powierzchni natarcia noży dłutaków z promieniem utworzonym na bocznej powierzchniami przyłożenia.

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Forming of the flanks of hobs cutting edges using a disk-type grinding wheel

Nieszporek T., Piotrowski A.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2002

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z. 58 [193]

265-272

EN

The element determining the accuracy of machining a gear wheel is the cuttiug edge of the hob. A cutting edge is a result of the intersection of the surface of attack by the hob cutting edge flank. The flanks of hobs can be formed by using grinding wheels, disk-type grinding wheels and finger-type grinding wheels. For small module hobs this is the disk-type grinding wheel of a rectilinear axial profile. However to increase the accuracy of the cutting edge we propose application of the disk-type grinding wheel of a circular axial profile, which makes it possible to receive the hobs of the AAA class accuracy. The proposed changes have been verified trough the computer program "Analysis of hob profiles" developed by the authors of this study and in the series of experimental tools.