Author
R.F. Ávila
Bio: R.F. Ávila is an academic researcher from Universidade Federal de Minas Gerais. The author has contributed to research in topics: Cutting tool & Machining. The author has an hindex of 4, co-authored 4 publications receiving 391 citations.
Topics: Cutting tool, Machining, Tool wear, Drilling, Machinability
Papers
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TL;DR: In this paper, the machinability of hardened steels at different levels of hardness and using a range of cutting tool materials were evaluated. And the results indicated that when turning AISI 4340 steel using low feed rates and depths of cut, the forces were higher when machining the softer steel and that surface roughness of the machined part was improved as cutting speed was elevated and deteriorated with feed rate.
222 citations
TL;DR: In this paper, the performance of three types of cutting fluids (two emulsions and one synthetic fluid) were compared to dry cutting when continuous turning hardened AISI 4340 steel (49 HRC) using mixed alumina inserts.
131 citations
TL;DR: In this paper, the performance of cutting fluids employed under two distinct machining operations involving aluminium alloys was investigated and the results indicated that an increase in the flow rate of the mist led to lower feed forces but higher torque, power consumption and specific cutting pressure in the drilling operation.
Abstract: Purpose – The knowledge over the performance of cutting fluids when applied under different machining conditions (such as distinct work material and cutting parameters) is critical in order to improve the efficiency of most machining operations. This paper is concerned with the performance of cutting fluids employed under two distinct machining operations involving aluminium alloys: drilling of AA 1050‐O aluminium applying cutting fluid as a mist and turning of AA 6262‐T6 aluminium alloy using cutting fluids (as a flood) with distinct extreme pressure additives (chlorine, sulphur and phosphor).Design/methodology/approach – This work reports on a experimental study of the performance of cutting fluids when machining aluminium alloys.Findings – The results indicated an increase in the flow rate of the mist led to lower feed forces but higher torque, power consumption and specific cutting pressure in the drilling operation (AA 1050‐O aluminium). The surface finish was not drastically affected by the cutting ...
36 citations
TL;DR: In this article, a 3D surface topography measurement technique using a stylus-based profilometric data acquisition system was employed for characterizing the evolution of the crater wear volume in coated hard metal tools.
30 citations
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TL;DR: In this paper, a detailed analysis and adaptation of cutting parameters, cutting tools, machine tools and the production environment is mandatory to ensure an efficient process and successfully enable dry machining.
812 citations
TL;DR: In this paper, the applicability of vegetable oil-based metalworking fluids in machining of ferrous metals has been investigated and its performances with respect to the cutting force, surface finish of work piece, tool wear and temperature at the cutting zone have been investigated.
Abstract: The increasing attention to the environmental and health impacts of industrial activities by governmental regulations and by the growing awareness level in the society is forcing industrialists to reduce the use of mineral oil-based metalworking fluids as cutting fluid. Cutting fluids have been used extensively in metal cutting operations for the last 200 years. In the beginning, cutting fluids consisted of simple oils applied with brushes to lubricate and cool the machine tool. As cutting operations became more severe, cutting fluid formulations became more complex. There are now several types of cutting fluids in the market and the most common types can be broadly categorized as cutting oils or water-miscible fluids. In this review, the applicability of vegetable oil-based metalworking fluids in machining of ferrous metals has been undertaken. The advantages of metalworking fluids and its performances with respect to the cutting force, surface finish of work piece, tool wear and temperature at the cutting zone have been investigated. It has been reported in various literature that metalworking fluids, which are vegetable oil-based, could be an environmentally friendly mode of machining with similar performance obtained using mineral oil-based metalworking fluids.
302 citations
TL;DR: In this paper, the effects of cutting speed, feed rate, workpiece hardness and depth of cut on surface roughness and cutting force components in the hard turning were experimentally investigated.
287 citations
TL;DR: In this paper, multiple linear regression models and neural network models are developed for predicting surface roughness and tool flank wear in finish turning of AISI D2 steels using ceramic wiper (multi-radii) design inserts.
236 citations
TL;DR: In this paper, the impact of cutting parameters such as cutting speed, feed rate and depth of cut with machining force, power, specific cutting force, tool wear and surface roughness on work piece was established by multiple linear regression models.
223 citations