Ultra-short pulsed laser conditioning of metallic-bonded diamond grinding tools

Ackerl, Norbert; Warhanek, Maximilian; Gysel, Johannes; Wegener, Konrad

doi:10.1016/j.matdes.2020.108530

Cited by 15 publications

(3 citation statements)

References 34 publications

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“…Deng et al [16] investigated the influence of the spot overlap, line overlap, power, and scan cycles on bond smoothness of the grinding wheel and found that the laser scan cycle should be carefully controlled to obtain well-controlled grain protrusion height. Furthermore, Ackerl et al [17,18] developed a multi-axis synchronized motion platform to improve the profile accuracy of shaped wheels. Various cross-sectional shapes of grooves fabricated by laser have been reported in [19,20].…”

Section: Introductionmentioning

confidence: 99%

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Geng

Tong

Huang

et al. 2022

Int J Adv Manuf Technol

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Freeform surfaces including both the aspherical and prismatic concave/convex have been widely utilized in optical, electronical, and biomedical areas. Most recently, it is reported that grinding with structured wheels provides new possibility to generate patterns on hard and brittle materials. This paper reports the latest research progress on micro-grooving glass ceramic using laser structured diamond grinding wheels. A nanosecond pulse laser is firstly integrated into an ultra-precision machine tool and used for the in-line conditioning of super abrasive grinding wheels, i.e., truing, dressing, and profiling/texturing. Meanwhile, an offset compensation method, considering the shifting depth of focus (DoF) at different laser irradiation positions, is proposed to accurately generate various profiles on the periphery of the grinding wheels. Three types of patterns (riblets, grooves, and pillars) are successfully fabricated on the ceramic substrate using the laser textured grinding wheels. The results indicate that the integrated laser system offers high flexibility and accuracy in shaping super abrasive grinding wheels, and the grinding using textured grinding wheels provides a promising solution to generate functional microstructures on hard and brittle materials.

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Section: Introductionmentioning

confidence: 99%

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Geng

Tong

Huang

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Their results indicated that the laser scan cycle should be carefully controlled to obtain good grain protrusion height. Furthermore, Ackerl et al [21,22] developed a multi-axis synchronized motion platform to improve the profile accuracy shaped by laser. Various cross-sectional shapes of grooves have been reported in [23,24].…”

Section: Introductionmentioning

confidence: 99%

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Geng¹,

Tong²,

Zhong³

et al. 2021

Preprint

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The freeform surfaces including both the aspherical and prismatic concave/convex have been widely utilized in optical, electronical, and biomedical areas. Most recently, it is reported that grinding with structured wheels provides new possibility to generate patterns on hard and brittle materials. This paper reports the latest research progress on micro-grooving glass ceramic using laser structured bronze bond diamond grinding wheels. A nanosecond pulse laser is firstly integrated into an ultra-precision machine tool and used for the in-line conditioning of super abrasive grinding wheels, i.e. truing, dressing, and profiling/texturing. Meanwhile, an offset compensation method, considering the shifting depth of focus (DoF) at different laser irradiation position, is proposed to accurately generate various profiles on the periphery of the grinding wheels. Three types of patterns (riblets, grooves, and pillars) are successfully fabricated on the ceramic substrate using the laser textured grinding wheels. The results indicate that the integrated laser system offers high flexibility and accuracy in shaping super abrasive grinding wheels, and the grinding using textured grinding wheels provide a promising solution to generate functional structures on hard and brittle materials.

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“…However, increasing the number of pulses with sub-nanosecond spaced ultra-short pulses is still a matter of controversy, where the enhanced efficiency for punching could not be observed for multi-pulse 2.5D strategies [28]. In terms of ablation strategy the laser energy can be distributed on axisymmetric workpieces by a spindle axis without using galvo scanners [29]. Besides orthogonal machining a quasi-tangential irradiation condition under glancing incidence is possible.…”

Section: Introductionmentioning

confidence: 99%

Evolution of microstructures on stainless steel induced by ultra-short pulsed laser ablation

et al. 2020

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Ultra-short pulsed laser ablation of stainless steel is accompanied by the evolution of different microstructures. Depending on the fluence, accumulated energy and number of laser passes cones from impurities, laser induced periodic surface structures, cone-like protrusion (CLP), and thermal bumps evolve at the surface. These often unwanted morphologies can be induced or inhibited by carefully choosing the strategy and laser parameters. The investigated range reveals a small processing window for defined 515 nm sub 1 ps ablation leading to low surface roughness using circular polarization. Hitherto, the origin and dependencies of CLP are still not well understood and for the first time a precursor ripple structure reported. These precursor ripples reveal supra-wavelength periodicity with about 2 μm spacing and evolve earliest after the second layer of ablation. Potentially, low spatial frequency laser-induced periodic surface structure generated with the first laser pass with pulse and hatch overlap are the root cause of CLP evolution. Moreover, the CLP growth is grain orientation and strongly polarization state dependent. Preferentially, CLP start to evolve at the {110} planes of the face-centered cubic crystals of the inspected austenitic stainless steel and linear polarized laser radiation revealing a 1:1 aspect ratio of 10 μm. A nanoindentation study at the interface near region on cross-sections reveals robust mechanical properties of this CLP structure.

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Ultra-short pulsed laser conditioning of metallic-bonded diamond grinding tools

Cited by 15 publications

References 34 publications

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Micro-grooving of brittle materials using textured diamond grinding wheels shaped by an integrated nanosecond laser system

Evolution of microstructures on stainless steel induced by ultra-short pulsed laser ablation

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