Laser Beam Micro Drilling – a Review

Pattanayak, Suvranshu; Panda, S.

doi:10.1007/s40516-018-0072-4

Cited by 24 publications

(7 citation statements)

References 71 publications

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“…MRR is found increasing with increase in gas pressure, because higher the pressure greater the kinetic force of gas that efficiently expels the molten material outside the hole cavity. Pattanayak and Panda 41 and Panda et al 19 reported the similar results. It is also evident that MRR is more influenced by gas pressure than the gas flow rate.…”

Section: Investigationsupporting

confidence: 58%

An integrated analysis of productivity, hole quality and cost estimation of single-pulse laser drilling process

Sarfraz

Shehab

Salonitis

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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Laser drilling is a well-established manufacturing process utilised to produce holes in various aeroengine components. This research presents an experimental investigation on the effects of laser drilling process parameters on productivity (material removal rate), hole quality (hole taper) and drilling cost. Single-pulse drilling was employed to drill a thin-walled Inconel 718 superalloy plate of 1 mm thickness using pulsed Nd:YAG laser. The experiments were designed using Box-Behnken statistical approach to investigate the impacts of pulse energy, pulse duration, gas pressure and gas flow rate on the selected responses. Multi-objective optimisation was performed using response surface methodology (RSM) based grey rational analysis (GRA) to identify optimal drilling conditions aiming to maximise the MRR and minimise hole taper and drilling cost. The optimal combination of drilling parameters was found as pulse energy of 20 J, pulse duration of 6 ms, gas pressure of 100 psi and gas flow rate of 40 mm3/s. A detailed cost analysis identified labour cost, gas consumption and machine costs as the major cost elements of the laser drilling process.

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Section: Investigationsupporting

confidence: 58%

An integrated analysis of productivity, hole quality and cost estimation of single-pulse laser drilling process

Sarfraz

Shehab

Salonitis

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…TAM is a method of locally preheating the material using various heat sources, such as laser, induction, and plasma, ahead of the cutting tool. In particular, as laser technology has improved, many researchers have studied LAM, which effectively preheats the difficult-to-cut materials using a laser beam with high density energy [1,2]. While the demand for difficult-to-cut materials is increasing in various fields, such as automobile and aerospace industries, they remain difficult to process because of their high hardness and brittleness.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Thermal Effect by Multi Heat Sources and Machining Characteristics of Laser and Induction Assisted Milling

Lee

2019

Materials

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Thermally assisted machining (TAM) is an effective method for difficult-to-cut materials, and works by locally preheating the workpiece using various heat sources, such as laser, induction, and plasma. Recently, many researchers have studied TAM because of its low manufacturing costs, high productivity, and quality of materials. Laser assisted machining (LAM) has been studied by many researchers, but studies on TAM using induction or plasma heat sources, which are much cheaper than lasers, have been carried out by only a few researchers. Lasers have an excellent preheating effect, but are expensive, and the temperature of the heated workpiece drops quickly. Here, multi heat sources were used to solve the shortage in supplied heat source with a single heat source. Induction was applied as an additional heat source. The purpose of this study is to analyze the thermal effect and temperature distribution of single heat source and multi heat sources, and compare the machining characteristics according to heat source types. In order to analyze the preheating effect according to the feed rate of the heat sources, a temperature measurement experiment using thermocouples was carried out, and the efficiency of the thermal effect using multi heat sources was verified. In addition, the effectiveness of the thermal analysis results was verified by comparison with the measured temperature distribution. The machining characteristics of Inconel 718 and Ti-6Al-4V with laser, induction, and laser-induction assisted milling (LIAMill) were analyzed, by cutting force and surface roughness.

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“…Laser-drilled holes can be considerably smaller as compared to those produced with conventional drilling tools [7]. Hole diameters from hundreds of nanometers up to several tens of millimeters can be easily fabricated using different laser drilling techniques [8]. When the hole diameter is less than 1 mm (but larger than the sub-μm range), then this process is termed as laser microdrilling.…”

Section: Introductionmentioning

confidence: 99%

“…When the hole diameter is less than 1 mm (but larger than the sub-μm range), then this process is termed as laser microdrilling. This technique has been tested in many different materials (metals, polymers, ceramics, or composites), and for many industrial applications [8], such as in in fuel injector nozzles, microfluidic devices, and in electronic packaging materials. Nasrollahi et al developed a two-side laser processing method to drill 250-µm thick silicon nitride (Si 3 N 4 ) substrates [9].…”

Section: Introductionmentioning

confidence: 99%

Laser Microdrilling of Slate Tiles

et al. 2019

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Slate is a natural rock usually used in roofs, façades, and for tiling. In spite of this broad use, the production process of slate tiles requires substantial improvements. An important quantity of slate from the quarry is wasted during the manufacturing of the final product. Furthermore, processes are not automatized and the production lead times can be considerably shortened. Therefore, new processing methods to increase productivity, reduce costs and to provide added value to the final slate product are required. Drilling is an important part of these manufacturing processes. Conventional drilling processes usually cause the breaking of the slate tiles; then, even a higher quantity of material is wasted. To overcome these problems, lasers emerge as a feasible tool to produce holes in this material, since mechanical stresses are not induced on the workpiece. In this work, we have studied the CO2 laser microdrilling of slate tiles. We used a Design of Experiments (DOE) methodology to determine the influence of the laser processing parameters on the hole quality. This work demonstrates the capability of a CO2 laser to produce holes in slate with less than 100 microns in diameter, avoiding any fracture, and with a processing time of less than 50 ms per hole. Finally, this process demonstrates the viability of the production of high-density micron-sized holes in a slate tile for water draining purposes.

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Laser Beam Micro Drilling – a Review

Cited by 24 publications

References 71 publications

An integrated analysis of productivity, hole quality and cost estimation of single-pulse laser drilling process

An integrated analysis of productivity, hole quality and cost estimation of single-pulse laser drilling process

A Study on the Thermal Effect by Multi Heat Sources and Machining Characteristics of Laser and Induction Assisted Milling

Laser Microdrilling of Slate Tiles

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