Laser-assisted Milling of Advanced Materials

Brecher, Christian; Emonts, Michael; Rosen, Chris-Jörg; Hermani, Jan-Patrick

doi:10.1016/j.phpro.2011.03.076

Cited by 66 publications

(33 citation statements)

References 4 publications

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“…The 30 % reduction in cutting force measured during LAML of Ti-64 is not as large as the 60 % reduction observed during milling of Inconel 718 [22] or the 40 % reduction during milling of a Ti-64 alloy [24]. This is mainly a result of differences between laser power and configuration during machining.…”

Section: Cutting Forcementioning

confidence: 72%

“…A numerical database for predicting a heat-affected zone was created based on the modeling work and experimentally validated using optical inspection of machined workpiece cross-sections. Brecher et al [22] integrated a laser into a milling machine spindle and performed LAML experiments on an Inconel 718 workpiece. Through coordination of laser heating during tool rotation and workpiece interaction, cutting force was reduced.…”

Section: Introductionmentioning

confidence: 99%

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Laser-assisted milling of Ti-6Al-4V with the consideration of surface integrity

Hedberg

Shin

Liangji

2015

Int J Adv Manuf Technol

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Titanium alloys are well known for their excellent strength-to-weight ratio and corrosion resistance and is highly sought after in the aerospace industry. This study focused on experimental evaluation of laser-assisted milling (LAML) of a Ti-6AL-4V (Ti-64) workpiece which uses localized preheating of the workpiece by a laser and characterizes the improvements to the machinability of these metals. The benefits of LAML are quantified for laser parameters which are shown to maintain final surface integrity of the heat-treatable workpiece after the machining process. Laser parameters are determined based on temperature prediction modeling. Laser preheating is shown to reduce cutting force during the machining process. Machinability improvement is characterized through inspection of flank wear on the cutting tool using LAML and traditional machining methods and comparing total tool life. Systematic characterization of samples is performed using hardness measurements, scanning electron microscopy (SEM), and X-ray diffraction (XRD) to ensure that material properties remained unaltered as a result of laser preheating. An economic analysis is performed for LAML to characterize the improvement obtained despite the additional costs associated with the laser equipment.

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Section: Cutting Forcementioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Laser-assisted milling of Ti-6Al-4V with the consideration of surface integrity

Hedberg

Shin

Liangji

2015

Int J Adv Manuf Technol

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“…It is significant to set cutting parameters which guarantee the highest durability and the largest volume of cut material simultaneously to minimalize costs of cutting. Finishing of very hard materials is good known aspect in industrial application but its costs are significant part of final product price [13,17]. Finishing is characterized by numerous disadvantages including:…”

Section: Introductionmentioning

confidence: 99%

“…[17] At the Poznan University of Technology, studies on turning of cladded cemented carbides layers are being conducted. Attempts are successfully implemented both in classic turning and laser assisted machining.…”

Section: Introductionmentioning

confidence: 99%

Tool life of diamond inserts after laser assisted turning of cemented carbides

Kieruj

Kukliński

2017

MATEC Web Conf.

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Abstract:The paper presents results and discussion on parameters influence on tool life when turning laser cladded cemented carbides under laser assisted machining (LAM) conditions. The layers are known as Technolase 30S. This material is widely recognized as hard-to-cut. The experimental investigation was carried out with diamond inserts. The laser power density, feed rate and laser scanning speed were analysed. Flank wear (VBc) indicator was measured and cutting tool life was calculated. It was proved that Technolase 30S can be machined with LAM technology. The laser enhanced turning is more efficient than conventional turning and grinding.

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“…However, as ceramics exhibit high levels of hardness and brittleness, machining them has usually been performed using a diamond grinding process that costs more than 60 % of the entire machining cost [3][4][5]. There are also many problems related to the long machining time.…”

Section: Introductionmentioning

confidence: 99%

A study on the development of milling process for silicon nitride using ball end-mill tools by laser-assisted machining

Kim

Lee

2014

Int J Adv Manuf Technol

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Silicon nitride is a non-oxide ceramic that represents strong characteristics in high strength, abrasion resistance, corrosion resistance, and thermal shock resistance at high temperatures and that has been widely used in the industry. However, it also exhibits high levels of hardness and brittleness, and machining of silicon nitride is usually implemented using a diamond grinding process. This presents difficulties in machining due to increased machining cost and time, and a machining method to reduce these is needed. Current studies on an alternative approach to the problem have been focused on laser-assisted machining (LAM) methods that facilitate machining by softening a workpiece using a laser heat source. The advantages of a LAM process are decreases in tool wear and cutting force and reductions in catastrophic tool failures and the occurrence of chatter. In this study, a high-power diode laser (HPDL) is used as a heat source for machining of silicon nitride. Machining experiments were carried out using cubic boron nitride (CBN) tools. The proper laser power for the experiment was determined through thermal analysis. A back-and-forth laser-path preheating method was newly proposed to obtain sufficient temperature for softening the silicon nitride. Machining experiments were performed using back-and-forth method and insulation material for protecting heat. The machining of silicon nitride was performed successfully by a laser-assisted milling (LAMill) process using a CBN ball end-mill tool, which is stable at high temperatures. In the machining with applying three times of a back-and-forth laser-path preheating process, tool breakage and gas marks were not occurred at the 170 W for processing a depth of cut of 0.15 mm. It is expected that the results of machining experiments can be used to process the various shape of silicon nitride material.

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Laser-assisted Milling of Advanced Materials

Cited by 66 publications

References 4 publications

Laser-assisted milling of Ti-6Al-4V with the consideration of surface integrity

Laser-assisted milling of Ti-6Al-4V with the consideration of surface integrity

Tool life of diamond inserts after laser assisted turning of cemented carbides

A study on the development of milling process for silicon nitride using ball end-mill tools by laser-assisted machining

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