Topography modeling of laser polishing on AISI 316L milled surfaces

Rosa, Benoit; Hascoët, Jean-Yves; Mognol, Pascal

doi:10.1051/meca/2014003

Cited by 24 publications

(6 citation statements)

References 10 publications

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“…The final surface topography depends on LP parameters, strategy, material and initial topography. Unlike milled surfaces, which can be considered as a homogeneous laser-polished topography (Rosa et al , 2014), the DMD surface is more chaotic, heterogeneous and composed of two different textures (Figure 4) correlated with the process principle. The first one is directional and caused by the layer-by-layer deposition direction.…”

Section: Resultsmentioning

confidence: 99%

Modelling and optimization of laser polishing of additive laser manufacturing surfaces

Rosa¹,

Mognol²,

Hascoët³

2016

RPJ

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Purpose Direct metal deposition (DMD) with laser is an additive manufacturing process enabling rapid manufacturing of complex metallic and thin parts. However, the final quality of DMD-manufactured surfaces is a real issue that would require a polishing operation. Polishing processes are usually based on abrasive or chemical techniques. These conventional processes are composed by many drawbacks such as accessibility of complex shapes, environmental impacts, high time consumption and cost, health risks for operators, etc. […] This paper aims to solve these problems and improve surface quality by investigating the laser polishing (LP) process. Design/methodology/approach Based on melting material by laser, the LP process enables the smoothing of initial topography. However, the DMD process and the LP processes are based on laser technology. In this context, the laser DMD process is used directly on the same machine for the polishing operation. Currently, few studies focus on LP of additive laser manufacturing surfaces, and it tends to limit the industrial use of additive manufacturing technology. The proposed study describes an experimental analysis of LP surfaces obtained by DMD process. Findings The investigation results in the improvement of a complete final surface quality, according to LP parameters. For mastering LP processes, operating parameters are modelled. Originality/value This experimental study introduces the LP of thin and complex DMD parts, to develop LP applications. The final objective is to create a LP methodology for optimizing the final topography and productivity time according to parts’ characteristics.

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Section: Resultsmentioning

confidence: 99%

Modelling and optimization of laser polishing of additive laser manufacturing surfaces

Rosa¹,

Mognol²,

Hascoët³

2016

RPJ

Self Cite

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“…Indeed, the final topography optimisation needs the characteristics of the treated parts to take into account, and only a few studies take the initial topography (Rosa et al, 2014) and parts topology into consideration. Several analyses are based on thick parts section (Gisario et al, 2011;Hafiz et al, 2012).…”

Section: Problematicmentioning

confidence: 99%

Laser polishing of additive laser manufacturing surfaces: methodology for parameter setting determination

Rosa

Hascoët

Mognol

2020

IJMR

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This paper focuses on the improvement of thin and complex surfaces obtained with a direct metal deposition (DMD) process through the use of the laser polishing process on the same five-axis machine. This study aims at giving a methodology to determine laser polishing operating parameters and thus master the final topography improvement. On the basis of experiments and a polynomial regression method, the classification and methodology of some operating parameters models are obtained. The proposed methodology is efficient within the feasibility domain and several qualitative objective functions and interactions between the operating parameters are taken into consideration. The proposed operating parameters models, have a 77-100% correlation with experimental data. In parallel, this study shows an impact of the parts topology on operating parameter settings. On the basis of the operating parameter ranking, the proposed methodology allows the determination of behaviour models regarding new parameters setting and without additional experiments.

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“…Unlike milled surfaces, which can be considered as an homogeneous laser polished topography, 15 ALM surface is more chaotic, heterogeneous, and composed of two different textures (Fig. 4) correlated with the process principle.…”

Section: A Initial Topography Analysismentioning

confidence: 99%

Laser polishing of additive laser manufacturing surfaces

Rosa

Mognol

Hascoët

2015

Journal of Laser Applications

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127

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International audienceThe additive laser manufacturing (ALM) technique is an additive manufacturing process which enables the rapid manufacturing of complex metallic parts and the creation of thin parts so as, for example, to decrease parts weight for biomechanical or aeronautic applications. Furthermore, compared with selective laser sintering technology, the ALM process allows creating more huge parts and material gradient. However, for aesthetic or tribological functions, the ALM surfaces need an additional finishing operation, such as the polishing operation. Polishing processes are usually based on abrasive or chemical techniques. These conventional processes are composed by many drawbacks such as accessibility of complex shape, environmental impact, high time consumption and cost, and health risks for operators. In order to solve these problems and to improve surface quality, the laser polishing (LP) process is investigated. Based on melting material by laser, laser polishing process enables the smoothing of initial topography. However, the ALM process and the laser polishing processes are based on laser technology. In this context, the laser ALM process is used directly on the same machine for the polishing operation. Moreover, an alternation between both processes can be established during the manufacturing operation in order to treat nonaccessible surfaces. Currently, few studies focus on laser polishing of additive laser manufacturing surfaces, and it tends to limit the industrial use of additive manufacturing technology. The proposed study describes an experimental investigation of laser polishing surfaces obtained by additive laser manufacturing process. The investigation results in the improvement of complete final surface quality, according to laser polishing parameters. This experimental study introduces the laser polishing of thin section parts, in order to develop laser polishing applications. According to a manufacturing chain context, the final objective is to create a multiprocess mastery in order to optimize the final topography and productivity time

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Topography modeling of laser polishing on AISI 316L milled surfaces

Cited by 24 publications

References 10 publications

Modelling and optimization of laser polishing of additive laser manufacturing surfaces

Modelling and optimization of laser polishing of additive laser manufacturing surfaces

Laser polishing of additive laser manufacturing surfaces: methodology for parameter setting determination

Laser polishing of additive laser manufacturing surfaces

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