Study on methods of enhancing the quality, efficiency, and accuracy of pulsed laser profiling

Zhou, Cong; Deng, Hui; Chen, Genyu

doi:10.1016/j.precisioneng.2016.02.005

Cited by 12 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In principle the fluence, pulse-to-pulse distance from laser repetition rate and scan speed leads to a certain overlap linked with the focal beam waist, which are the main parameters [18]. However, depending on the desired process either high material removal rate or surface quality can be reached for 2.5D orthogonal strategies [19] with many layers ablated accumulating stochastic deviations in material removal [20]. This leads to limiting constraints, where high average power must be distributed on the workpiece by high scan speeds and repetition rates [21].…”

Section: Introductionmentioning

confidence: 99%

“…Besides orthogonal machining a quasi-tangential irradiation condition under glancing incidence is possible. This allows the use of high average power at fast surface speeds leading to more competitive laser machining processes with decent surface quality and geometric conformity [20,30]. Especially, quasi-tangential laser machining has a huge potential and could utilize the high power nowadays available for ablation, but with increased complexity in the laser path and hatch calculation compared to 2.5D strategies [31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2020

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, the graphitization of the diamond grain persisted for all parameters with the broad characteristic Raman peak at 1582 cm −1 . A follow-up study from the same group (Zhou et al, 2016) investigated the graphite layer evolving under ambient, argon and grinding fluid condition. Nonetheless, a graphite layer was clearly detectable in the Raman spectra at all ablation conditions after laser manufacturing.…”

Section: Introductionmentioning

confidence: 99%

High-Precision Laser Conditioning of Diamond Grinding Wheels

Ackerl¹,

Warhanek²,

Gysel³

et al. 2019

Preprint

View full text Add to dashboard Cite

A novel approach for machining of cylindrical hard materials and arbitrary shapes is presented. Diamond grinding tools with complex geometry are manufactured with picosecond orthogonal and quasi-tangential combined laser ablation. This rapid and flexible approach for small-scale production of master tools for industrial production trumps conventional approaches. Hitherto, the overall process time is faster compared to conventional technologies with the benefit of free standing diamond grains. A laser manufacturing chain achieving an ablation rate of 35mm3/min with a maximal geometric deviation of 3μm is presented. The meta-stable diamond structure persists and is assessed via Raman spectroscopy. The final grinding tools is sharpened by a radial laser process removing preferentially the metal-based binding material. This isolates the statistically distributed diamond grains from the binder. Hence, high-precision diamond grinding wheels with a mean error of smaller 1μm over the complete contour can be manufactured.

show abstract

“…Other moves towards more precise non-contact manufacturing practices come from making sure the manufacturing tools are properly taken care of and through the use of new technologies in tool maintenance. An example of such efforts is the ones by Zhou et al [12], which has focused in augmenting the quality of laser profiling for dressing of grinding wheels by the variation of power to the laser, which shows high promise for alternatives to diamond dressing.…”

Section: Introductionmentioning

confidence: 99%

Multiple classification of the force and acceleration signals extracted during multiple machine processes: part 1 intelligent classification from an anomaly perspective

Griffin

Doberti

Hernández

et al. 2017

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

Study on methods of enhancing the quality, efficiency, and accuracy of pulsed laser profiling

Cited by 12 publications

References 9 publications

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

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

High-Precision Laser Conditioning of Diamond Grinding Wheels

Multiple classification of the force and acceleration signals extracted during multiple machine processes: part 1 intelligent classification from an anomaly perspective

Contact Info

Product

Resources

About