Low initial lubrication procedure in the machining of copper-nickel 70/30 ASTM B122 alloy

García-Martínez, Enrique; Miguel, V.; Manjabacas, M.C.; Martínez, A; Naranjo, Jesús Andrés

doi:10.1016/j.jmapro.2021.01.002

Cited by 15 publications

(10 citation statements)

References 25 publications

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“…The three main components of the cutting force and their evolution were registered by using a three-axis dynamometer, built by the research team, with a capability of measuring forces up to 5000 N and a resolution lower than 1 N. The dynamometer is composed for four strain-gauge load cells that were calibrated under static conditions and validated in previous studies [21]. The temperature for cutting operations with uncoated WC inserts was registered by using a natural workpiece-thermocouple technique formed by the contact pair workpiece-tool, that is, Ti48Al2Cr2Nb-WC/Co, verified for this kind of application in previous research [22].…”

Section: Experimental Methodologymentioning

confidence: 99%

Optimization of the Dry Turning Process of Ti48Al2Cr2Nb Aluminide Based on the Cutting Tool Configuration

et al. 2022

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Titanium aluminides are one of the most promising materials in aeronautical and automotive applications. However, their low machinability makes the processing of these alloys quite difficult under sustainability conditions, specially without lubrication. The current study focuses on the turning process of the Ti48Al2Cr2Nb gamma titanium aluminide under dry conditions. As far as we are aware, dry cutting is the most sustainable feature, although it has not been traditionally applied on titanium aluminides due to the accelerated tool wear that the material promotes. The main novelty of this work consists of providing a simple solution for reducing the tool wear based on the inclination of the cutting insert, what is evaluated in terms of tool wear and tool life, cutting forces, cutting temperature, surface integrity of the machined part, as well as its microhardness and microstructural effects. The results shown here clearly point out a better performance of the machining process. This fact could be understood if we take into consideration that an increment of the clearance angle from 6.3° to 11.6° and 15° increases the tool life by five and six times, respectively, using efficient cutting speeds, whose values have increased by 50% with respect to the original cutting conditions. This improvement is explained according to the reduction in the cutting temperature and friction forces in the flank face of the tool. In addition, the use of uncoated carbide inserts may lead to a better behaviour than the coated ones, considering the results obtained for a PVD TiAlN + AlCr2O3 coated insert herein researched.

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Section: Experimental Methodologymentioning

confidence: 99%

Optimization of the Dry Turning Process of Ti48Al2Cr2Nb Aluminide Based on the Cutting Tool Configuration

et al. 2022

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“…Following the methodology established by the authors previously [1], the turning tests conditions of ASTM B122 alloy, under fixed cutting speed of 67.7 m/min, are summarized in Table 1. Short cutting tests consisting of turning an axial length of 30 mm, were developed for each cutting condition.…”

Section: Methodology For the Surface Integrity Analysismentioning

confidence: 99%

“…The approach of this paper is applicable to other different materials, and it would allow us to understand if this lubrication technique could be used in the industrial field by substituting the traditional flood lubrication. In a previous study [1], it was found that LIL technique is effective on the reduction of the cutting forces in comparison with dry machining. Besides, for finishing operations, better results were achieved than with flood lubrication, which leads to important savings in lubricants and less environmental impact.…”

Section: Introductionmentioning

confidence: 96%

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Surface Integrity and Tool Wear Analysis on Turning of Copper-Nickel 70/30 ASTM B122 Alloy under Low Initial Lubrication

et al. 2021

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Traditional flood lubrication in machining processes is considered an unsustainable technique. In this paper, the low initial lubrication (LIL) technique is analysed during turning of cupronickel 70/30 alloy, in terms of surface roughness. A tribological analysis has been developed on a pin-on-disk tribometer comparing different lubrication systems, obtaining comparative results of friction and tool wear. It has been found that the tool wear is 73% lower in comparison to flood lubrication. LIL technique shows the ability to reduce the friction coefficient compared to dry machining and leads to improve tool wear in comparison with flood lubrication. The surface integrity evaluation of machined parts finds that the LIL technique can improve the surface roughness under specific machining conditions.

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“…Dry machining has always been a great challenge [20] because lubrication causes environmental problems [21] and, in some cases, is not even allowed. Thus, aspects related to lubrication in machining have also been widely explored by using techniques that seek to minimize the use of lubrication (minimum quantity lubrication) [22,23]. On the other hand, the need to increase productivity levels has not only resorted to the science of materials and technological processes to offer the industry the necessary means to produce with the necessary quality at increasingly competitive costs but also captured the attention of the industrial engineering field [24,25].…”

Section: Introduction and Scopementioning

confidence: 99%

Metal Machining—Recent Advances, Applications, and Challenges

Silva

2021

Metals

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Low initial lubrication procedure in the machining of copper-nickel 70/30 ASTM B122 alloy

Cited by 15 publications

References 25 publications

Optimization of the Dry Turning Process of Ti48Al2Cr2Nb Aluminide Based on the Cutting Tool Configuration

Optimization of the Dry Turning Process of Ti48Al2Cr2Nb Aluminide Based on the Cutting Tool Configuration

Surface Integrity and Tool Wear Analysis on Turning of Copper-Nickel 70/30 ASTM B122 Alloy under Low Initial Lubrication

Metal Machining—Recent Advances, Applications, and Challenges

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