Reducing surface roughness of metallic freeform-fabricated parts using non-tactile finishing methods

Ramos‐Grez, Jorge; Bourell, David L.

doi:10.1504/ijmpt.2004.004944

Cited by 102 publications

(49 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figs. 7-9 show clearly the transition from SSM to SOM regime, with the conclusion that the regimes expected by Ramos et al [11] are present in the laserpolishing process.…”

Section: Discussion Of Experimental Resultssupporting

confidence: 75%

“…When the process parameters are optimum the laser beam only melts material on the peaks, and due to capillary pressure the melted material fills the valleys, producing a smoother topography than previously [11].…”

Section: Basic Criteria Of the Laser-polishing Processmentioning

confidence: 98%

“…Some papers [11] have predicted two different process regimes for the laser-polishing process. Depending on the thickness of the melted layer, it is possible to identify two different regimes: shallow surface melting (SSM) and surface over melt (SOM).…”

Section: Basic Criteria Of the Laser-polishing Processmentioning

confidence: 99%

See 2 more Smart Citations

Laser polishing of tool steel with CO2 laser and high-power diode laser

Ukar

Lamíkiz

Lacalle

et al. 2010

International Journal of Machine Tools and Manufacture

136

View full text Add to dashboard Cite

“…Figs. 7-9 show clearly the transition from SSM to SOM regime, with the conclusion that the regimes expected by Ramos et al [11] are present in the laserpolishing process.…”

Section: Discussion Of Experimental Resultssupporting

confidence: 75%

Section: Basic Criteria Of the Laser-polishing Processmentioning

confidence: 98%

See 1 more Smart Citation

Laser polishing of tool steel with CO2 laser and high-power diode laser

Ukar

Lamíkiz

Lacalle

et al. 2010

International Journal of Machine Tools and Manufacture

136

View full text Add to dashboard Cite

“…Some studies focus on SLS polished surfaces optimization [8][9][10] and less are concentrated on ALM laser polished surfaces. 11 Laser polishing optimizations 12,13 of surfaces of thick section parts are proposed and it tends to limit aeronautic and biomechanical applications of laser polishing process.…”

Section: Problematicmentioning

confidence: 99%

Laser polishing of additive laser manufacturing surfaces

Rosa

Mognol

Hascoët

2015

Journal of Laser Applications

127

View full text Add to dashboard Cite

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

show abstract

“…Principle of polishing laser radiation in cross section [5] The process parameters optimization aims to obtain a laser beam that only melts the surface peaks of the material; due to capillary pressure the melted material fills the valleys producing a smoother topography with respect to the initial one [6]. In literature recent researches are available on both metallic materials and coating focusing their attention on different type of metals as titanium [7,8] and nickel [9] as well as on coating as Hastelloy C22 [10], ceramic materials [11] and tungsten carbide coating [12,13].…”

Section: Introductionmentioning

confidence: 99%

Nd:YOV4 laser polishing on WC-Co HVOF coating

Giorleo¹,

Ceretti²,

Montesano³

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. WC/Co coatings are widely applied to different types of components due to their extraordinary performance properties including high hardness and wear properties. In industrial applications High Velocity Oxy-Fuel (HVOF) technique is extensively used to deposit hard metal coatings. The main advantage of HVOF compared to other thermal spray techniques is the ability to accelerate the melted powder particles of the feedstock material at a relatively high velocity, leading to obtain good adhesion and low porosity level. However, despite the mentioned benefits, the surface finish quality of WC-Co HVOF coatings results to be poor (Ra higher than 5 μm) thus a mechanical polishing process is often needed. The main problem is that the high hardness of coating leads the polishing process expensive in terms of time and tool wear; moreover polishing becomes difficult and not always possible in case of limited accessibility of a part, micro dimensions or undercuts. Nowadays a different technique available to improve surface roughness is the laser polishing process. The polishing principle is based on focused radiation of a laser beam that melts a microscopic layer of surface material. Compared to conventional polishing process (as grinding) it ensures the possibility of avoiding tool wear, less pollution (no abrasive or liquids), no debris, less machining time and coupled with a galvo system it results to be more suitable in case of 3D complex workpieces. In this paper laser polishing process executed with a Nd:YOV4 Laser was investigated: the effect of different process parameters as initial coating morphology, laser scan speed and loop cycles were tested. Results were compared by a statistical approach in terms of average roughness along with a morphological analysis carried out by Scanning Electron Microscope (SEM) investigation coupled with EDS spectra.

show abstract

Reducing surface roughness of metallic freeform-fabricated parts using non-tactile finishing methods

Cited by 102 publications

References 0 publications

Laser polishing of tool steel with CO2 laser and high-power diode laser

Laser polishing of tool steel with CO2 laser and high-power diode laser

Laser polishing of additive laser manufacturing surfaces

Nd:YOV4 laser polishing on WC-Co HVOF coating

Contact Info

Product

Resources

About