High precision drilling with short-pulsed solid-state lasers

Abeln, Tobias; Radtke, Joachim; Dausinger, Friedrich

doi:10.2351/1.5059302

Cited by 24 publications

(8 citation statements)

References 4 publications

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“…The major problem is the melt produced by using long pulsed lasers. Irregular and incomplete melt expulsion affects the shape of the hole, produces recast layers and may even partially close a hole during the drilling process that is open initially as discussed in (Abeln et al, 1999;Govorkov et al, 2001). In the present study, variation of the cladding diameter and hole shape is examined under different laser parameters.…”

Section: Resultsmentioning

confidence: 95%

Characterization of the drilling alumina ceramic using Nd:YAG pulsed laser

Kacar

Mutlu

Akman

et al. 2009

Journal of Materials Processing Technology

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Section: Resultsmentioning

confidence: 95%

Characterization of the drilling alumina ceramic using Nd:YAG pulsed laser

Kacar

Mutlu

Akman

et al. 2009

Journal of Materials Processing Technology

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“…Here the experience has been gained that the copper-vapor laser is not suitable for industrial mass production up to now. Combined with a short-pulse solid-state-laser a special process method -so called helical drilling -was developed [4]. In helical drilling a focused laser beam cuts ist spiral path to create the contour of the hole.…”

Section: Laser Drilling and Precision Cuttingmentioning

confidence: 99%

Laser with Bosch: a flexible tool in serial production of an automotive supplier

Rapp

2003

SPIE Proceedings

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Laser technology in Bosch-production has an already over twenty-five year old tradition and with the advancement of laser beam sources and process engineering always new ranges of application have been found. The advantages of the laser as a tool for material processing lie in the fact that it fulfills the Bosch-specific requirements regarding the product spectrum (small, heat sensitive construction units) and serial production strategies (line manufacturing with high numbers of pieces) by favorable process advantages, like short process times, small energy input and good automizability. The main operational areas of the laser are at present in the product ranges automotive equipment and electronics. Especially in the fuel injection technology manufacturing is hard to imagine without laser material processing. Lasers are used with Bosch in various ways for welding, marking, surface treatment, soldering and drilling. In addition trimming and scribing of semiconductor elements is applied for controllers and sensors. Laser cutting -with the exeption of precision cutting of rotational symmetric parts -is used only in the manufacturing of prototypes because it is uneconomic in mass production compared to punching and has no technological advantages. Future main areas of development will be microjoining and -ablation, joining of plastics and surface finishing.

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“…For dielectric materials, this is not the case in visible and near JR wavelength range. If irradiated with high enough intensity, however, ceramics decompose and produce metallic surface layers limiting optical penetration depth6' [7] In both material groups of technical interest, metals and ceramics, penetration depth is determined by the thermal one, therefore. This thermal penetration is given by the thermal diffusivity K and the pulse length tH 1th = 2ic provided m is longer than the electron/photon relaxation time being in the order of 10 ps.…”

Section: Reduction Of Pulse Lengthmentioning

confidence: 99%