A contribution to the understanding of chip formation mechanism in high-speed cutting of hardened steel

Dolinšek, Slavko; Ekinović, Sabahudin; Kopač, Janez

doi:10.1016/j.jmatprotec.2004.07.144

Cited by 48 publications

(17 citation statements)

References 11 publications

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“…Indeed, chip genesis is accompanied by some interrelated mechanisms such as localized shear, adiabatic shear, and also a catastrophic shear zone in the form of extensive cracks (see, for example, reference [10]). According to Dolinšek et al [11], chips are formed segmentally and the morphology of their formation is a result of the changeable cutting conditions, which mainly depend on the following: (a) mechanical, thermal, and thermochemical characteristics of the work material; (b) cutting conditions; (c) changes in sliding characteristics at the primary shear zone; (d) changes in the tribological circumstances at the tool-chip interface; (e) the possible interactions between the primary and secondary shear zone and the dynamic behaviour of the machine-tool system and its linkage with the cutting process.…”

Section: Resultsmentioning

confidence: 99%

Experimental and numerical study of chip formation during straight turning of hardened AISI 4340 steel

Belhadi¹,

Mabrouki²,

Rigal³

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part B:

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The present paper is a contribution to the investigation of physical phenomena accompanying sawtooth chip formation in the case of hard turning. The study concerns the machining with coated carbide of tempered AISI 4340 steel with a Rockwell C hardness of 47 HRC. The main idea in this paper deals with the establishment of a direct relationship between serrated-chip morphology simultaneously with force component signals derived from acquisition at high frequency and with the width of facets detected on a workpiece machined surface. This experimental work was supported by a numerical simulation based on Abaqus/ Explicit software. Numerical results dealing with effect of temperature evolution on the chip morphology show that the beginning of the sawtooth chip initiation is due to an adiabatic shear at the tool tip with propagation pathway towards the free surface. In addition, computed results have a good corroboration with those obtained experimentally.

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Section: Resultsmentioning

confidence: 99%

Experimental and numerical study of chip formation during straight turning of hardened AISI 4340 steel

Belhadi¹,

Mabrouki²,

Rigal³

et al. 2005

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…In many papers dealing with cutting operations, the aim usually declared is to study the chip morphology by considering working parameters and physical properties of the machined material [1][2][3][4]. The study of chip morphology is not an objective in itself.…”

Section: Introductionmentioning

confidence: 99%

A contribution to a qualitative understanding of thermo-mechanical effects during chip formation in hard turning

Mabrouki

Rigal

2006

Journal of Materials Processing Technology

160

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“…It can be seen that the serrated type of chip was formed for A2017-T3, while the flow type of chip was formed for A2017-O, regardless of cutting speed. In high-speed cutting of Ti-6Al-4V (12) (14) and chromium-molybdenum steel (15) , the distance between peak and valley of the serrated chip enlarges and the segment of the serrated chip becomes clear as the cutting speed increases. However, for A2017-T3, such a clear change in shape of the serrated chip with the cutting speed did not appear in this cutting speed range.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Heat Treatment Condition upon the High-Speed Cutting Mechanism of Aluminum Alloy A2017

Sando

Higashi

Shinozuka

2012

JAMDSM

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This paper discusses the influence of heat treatment condition of aluminum alloy upon cutting mechanism. The orthogonal cutting experiments of A2017-T3 and A2017-O with a cutting speed of from 0.5 m/s to 160 m/s are conducted. The experiments obtain the following results: A2017-T3 forms discontinuous and serrated chip, while A2017-O forms continuous flow-type chip, regardless of cutting speed. The tendencies of the changes in shear angle, cutting forces, friction angle and the shear stress on the shear plane with the cutting speed are the same between A2017-T3 and A2017-O, when the cutting speed is less than 80 m/s. The significant dissimilarities in the cutting mechanism, however, between A2017-T3 and A2017-O come to appear gradually, when the cutting speed exceeds 80 m/s. For A2017-T3, the shear stress on the shear plane is steady, and the friction angle at the tool-chip interface increases slightly in such a high-speed cutting condition. In contrast, for A2017-O, the shear stress on the shear plane rises gradually, while the friction angle keeps decreasing with the cutting speed. An analysis based on the simple shear model shows that the shear strain rate at the shear zone reaches up to 10 7 1/s when the cutting speed is beyond 80 m/s. The appearance of these dissimilarities in the cutting mechanism due to the difference in the heat treatment conditions will depend on the characteristics of dynamic plastic behavior and dynamic friction property of aluminum alloy appearing at high-strain-rate fields.

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A contribution to the understanding of chip formation mechanism in high-speed cutting of hardened steel

Cited by 48 publications

References 11 publications

Experimental and numerical study of chip formation during straight turning of hardened AISI 4340 steel

Experimental and numerical study of chip formation during straight turning of hardened AISI 4340 steel

A contribution to a qualitative understanding of thermo-mechanical effects during chip formation in hard turning

Influence of the Heat Treatment Condition upon the High-Speed Cutting Mechanism of Aluminum Alloy A2017

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