Effect of the local friction and contact nature on the Built-Up Edge formation process in machining ductile metals

Atlati, Samir; Haddag, Badis; Nouari, Mohammed; Moufki, Abdelhadi

doi:10.1016/j.triboint.2015.04.024

Cited by 67 publications

(34 citation statements)

References 27 publications

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“…Atlati et al [15] investigated the built-up-edge (BUE) formation and tribological behaviour at the tool-work material interface when cutting 2024-T351 aluminium alloy using a cemented carbide WC/Co tool. They proposed a new concept of timedependent friction coefficient to represent varying contact conditions at the tool-work interface.…”

Section: Friction Effects In Fe Modelling Of Machiningmentioning

confidence: 99%

Advances in material and friction data for modelling of metal machining

et al. 2017

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Section: Friction Effects In Fe Modelling Of Machiningmentioning

confidence: 99%

Advances in material and friction data for modelling of metal machining

et al. 2017

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“…Simulations were run on commercial software DEFORM. In finite element simulation studies, a high friction factor (m) is used to create sticking conditions at the tool chip interface which yields a low velocity region in front of the cutting edge is assumed to behave like a BUE [23,25]. A high friction factor value of 0.95 was used in finite element simulations in order to examine the low-velocity region in front of the cutting edge and compare its dimensions with experimental measurements.…”

Section: Finite Element Simulation Model Of Microscale Machiningmentioning

confidence: 99%

“…In addition, BUE also affects the friction conditions at the tool-chip and toolworkpiece interfaces, where the cutting tool material is no longer directly in contact with the chip and the machined surface. Atlati et al [25] investigated the influence of BUE on friction conditions while macroscale machining of aluminum alloy by introducing a time-dependent friction concept to simulate BUE formation with a finite element simulation. They assumed that changing friction conditions affect the velocity distribution in front of the cutting tool and low velocity region in front of the tool simulates BUE formation.…”

Section: Introductionmentioning

confidence: 99%

Investigating the influence of friction conditions on finite element simulation of microscale machining with the presence of built-up edge

Oliaei

2016

Int J Adv Manuf Technol

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In micromachining, the uncut chip thickness is less than the cutting tool edge radius, which results in a large negative effective rake angle. Depending on the material properties, this large negative rake angle promotes built-up edge (BUE) formation. A stable BUE acts like a cutting edge and affects the mechanics of the process. The size of the BUE increases with increasing uncut chip thickness and cutting speed. It also creates a positive rake angle, but it decreases the clearance angle of the tool. A method of including BUE formation in finite element simulations is to use sticking friction conditions at the tip of the tool. However, this approach is shown to be insufficient to simulate BUE formation in microscale machining. Therefore, the cutting edge is modified with the experimental BUE size in the finite element simulations based on experimental measurements. The influence of friction models between BUE and the work material has been investigated, and the study identifies friction coefficients that yield good agreements with experimental results. The finite element model is shown to be capable of simulating process forces and chip shapes for uncut chip thickness values larger than minimum uncut chip thickness.

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“…During machining, high temperatures generated at the tool-chip interface resulted in some of the material melting. As a result, this material gradually attached to the cutting tool as a permanent structure in the form of bulk layer [5]. The existence of BUE is highly dependent on spindle speed and feed rate.…”

Section: Methodsmentioning

confidence: 99%

Observation of Built-up Edge Formation on a Carbide Cutting Tool with Machining Aluminium Alloy under Dry and Wet Conditions

et al. 2017

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Abstract. This paper presents the morphology of built-up edge (BUE) formation under wet and dry conditions with low and high cutting speeds. The workpiece materials and cutting tools selected for this work were aluminium alloy and canela carbide inserts graded PM25. The cutting tools underwent turning operation machining tests and their performance was evaluated by the flank wear and observation of the tool wear area. The machining tests were conducted at different spindle speeds and feed rates while the cut depth was kept constant. The analysis showed that formation of the BUE was dominant at low cutting speeds in dry conditions, but in wet conditions at high cutting speeds, a better performance was exhibited in terms of wear analysis.

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Effect of the local friction and contact nature on the Built-Up Edge formation process in machining ductile metals

Cited by 67 publications

References 27 publications

Advances in material and friction data for modelling of metal machining

Advances in material and friction data for modelling of metal machining

Investigating the influence of friction conditions on finite element simulation of microscale machining with the presence of built-up edge

Observation of Built-up Edge Formation on a Carbide Cutting Tool with Machining Aluminium Alloy under Dry and Wet Conditions

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