Transient, three-dimensional heat transfer model for the laser assisted machining of silicon nitride: I. Comparison of predictions with measured surface temperature histories

Rozzi, Jay C.; Pfefferkorn, Frank E.; Incropera, F. P.; Shin, Yung C.

doi:10.1016/s0017-9310(99)00217-3

Cited by 140 publications

(82 citation statements)

References 15 publications

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“…This result brings into question the conclusion of their first model [14,15], which predicted a sharp drop in temperature with an increase in the rotational speed of the workpiece. Indeed, if the speed increases, the heat input due to the laser decreases, but the heat generated in the primary zone increases.…”

Section: Tðxyztþmentioning

confidence: 86%

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Comprehension of chip formation in laser assisted machining

Germain

Santo

Lebrun

2011

International Journal of Machine Tools and Manufacture

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Laser Assisted Machining (LAM) improves the machinability of materials by locally heating the workpiece just prior to cutting. Experimental investigations have confirmed that the cutting force can be decreased, by as much as 40%, for various materials. In order to understand the effect of the laser on chip formation and on the temperature fields in the different deformation zones, thermo-mechanical simulations were undertaken. A thermo-mechanical model for chip formation was also undertaken. Experimental tests for the orthogonal cutting of 42CrMo4 steel were used to validate the simulation. The temperature fields allow us to explain the reduction in the cutting force and the resulting residual stress fields in the workpiece.

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Section: Tðxyztþmentioning

confidence: 86%

“…This solution is very general but it can be optimized for the LAM process. Analytical studies of laser heating in terms of LAM have been conducted at the University of Purdue by Rozzi et al [14,15]. They determined the temperature field (3D) induced by a laser beam in a bar of silicon nitride in motion.…”

Section: Tðxyztþmentioning

confidence: 99%

Comprehension of chip formation in laser assisted machining

Germain

Santo

Lebrun

2011

International Journal of Machine Tools and Manufacture

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“…LAM is especially suitable for dealing with difficult-to-machine materials by preheating and softening the workpiece surface before the subsequent conventional material removal processes. Due to the importance of temperature distribution near the local cutting zone during LAM, a lot of efforts have been made to simulate the temperature distribution caused by laser radiation along with subsequent cutting operations on various difficult-to-machine materials [1][2][3]. These thermal models can help to identify the effect of operational parameters (both laser-related processing parameters and machiningrelated processing parameters) on the temperature distribution at the cutting zone and is reversely able to provide guidelines on parameter selection for optimizing the machining process.…”

Section: Matec Web Of Conferencesmentioning

confidence: 99%

“…Actually, laser power, laser spot diameter, preheat time, laser-tool lead are the main operational parameters for laser assisted machining process as well as the thermal absorption rate. The thermal response of the rotating opaque cylindrical workpiece subjected to laser radiation with and without materials removal process has been analysed with a transient, three-dimensional heat transfer model by Rozzi et al [1,2]. The model geometries are shown in Fig.…”

Section: Temperature Field Near the Location Of Lammentioning

confidence: 99%

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Laser-assisted machining process simulation for precision mould/die manufacturing

Zeng

Qin

2015

MATEC Web of Conferences

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Abstract. Laser-assisted machining (LAM) is a kind of thermally assisted manufacturing process which preheats workpiece material with a highly-localized laser beam and then is followed by a conventional machining operation. It could greatly improve the machinability and gives better machining quality, especially suitable for hard-to-cut materials such as superalloys, tool steels. For manufacturing the high-precision moulds/dies that could fabricate micro and precision components, the thermal assistance at the local cutting zone, will help to lower the cutting force and consequently improve the internal surface quality of the machined moulds/dies. In this paper, a numerical study of the laser-assisted cutting of plastic mould steel NAK80 is reported. The simulation of LAM of NAK80 is realized by combining two procedures: simulation of moving laser heat source applied on the local surface of workpiece which causes the corresponding temperature field arise and material soften, and simulation of the subsequent cutting processes. This research will offer the die/mould manufacturers a more efficient planning tool for the fabrication of the micro, precision dies/moulds of high surface quality, and hence, for forming the high-quality micro components as well as for longer die/mould life.

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