Experimental Analysis of Laser and Scanner Control Parameters During Laser Polishing of H13 Steel

Miller, J. D.; Tutunea‐Fatan, O. Remus; Bordatchev, Evgueni V.

doi:10.1016/j.promfg.2017.07.029

Cited by 14 publications

(12 citation statements)

References 12 publications

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“…Except the spot irradiation and scanning speed, the surface polishing strategy was similar to previous works [11][12][13], and the polishing parameters were optimized and given in Table 2. To polish rapidly, the scanning speed was setup over 600% higher than previous works [3,14]. Total 36 specimens were polished, each specimen was polished more than 3 times in different regions in order to make an error bar of roughness measurement.…”

Section: Cw Laser Polishing Using Different Sopt Diametersmentioning

confidence: 99%

“…∆ 1 is the step-over of the CW laser, ∆ 2 is that of the pulsed laser, and L O is the overlap between both beams. The trajectory of CW laser is zigzag [3], and that of pulsed laser is the combination of zigzag and square wave. x is a half wavelength of the square wave.…”

Section: Trajectory Of Zigzag-square Wave Of Dual-beammentioning

confidence: 99%

“…The zigzag trajectory is a common practice in laser processing [3,18]; however, the pulsed laser is following up with the CW laser with its own square wave route besides the zigzag trajectory, its route network should be optimized individually. According to the route network optimization of previous works [19,20], the offset contours of laser scanning trajectory are marked in four directions, which are from left to right, from right to left, from top to bottom and from bottom to top, and the endpoints and intersections are connected in turn.…”

Section: Trajectory Of Zigzag-square Wave Of Dual-beammentioning

confidence: 99%

“…One new approach to automate this work is rapidly polishing by means of laser radiation. This is why, in recent years, laser polishing has become more widely used due to the ability to quickly and efficiently polish surfaces [3]. Besides metal, laser is able to polish non-metal materials, ultrafast lasers have been used to produce complex shapes in glass [4] while CW lasers have been used for polishing them with extremely low surface roughness [5].…”

Section: Introductionmentioning

confidence: 99%

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Experiment Study of Rapid Laser Polishing of Freeform Steel Surface by Dual-Beam

et al. 2019

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One of the challenges regarding widespread use of parts made from alloy steel is their time-consuming polishing process. A rough freeform surface of part has been often expected to be polished rapidly up to a smooth surface finish. The focus of this study is to develop a fast polishing method of freeform surface by using dual-beam lasers. The dual-beam laser system consists of continuous laser (CW) and pulsed laser based on a five-axis CNC device. In this study, a series of experiments of CW laser polishing present the effects of different spot irradiation on surface topography, then the combination trajectory of zigzag and square waveform of pulsed laser is explored to realize a “melting peak for filling into valley” (MPFV) method. The polishing experiment on a semisphere of S136H steel polished by dual-beam shows that a rough semisphere surface was rapidly polished from initial state value of Sa (=877 nm) to post-polished value of Sa (=142 nm), and the polishing efficiency is as high as 2890 cm2/H.

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Section: Cw Laser Polishing Using Different Sopt Diametersmentioning

confidence: 99%

Section: Trajectory Of Zigzag-square Wave Of Dual-beammentioning

confidence: 99%

Section: Trajectory Of Zigzag-square Wave Of Dual-beammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experiment Study of Rapid Laser Polishing of Freeform Steel Surface by Dual-Beam

et al. 2019

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“…Toward modeling and developing the LAMP process and investigating the effect of this process on the mechanical properties of AM materials, several studies have recently been carried out [35][36][37][38][39][40][41][42][43][44][45][46]. Chow et al [47] demonstrated the application of pulsed laser (PL) for both micro-milling and micro-polishing processes by changing the focal offset distance between the laser focus and the part surface.…”

Section: Introductionmentioning

confidence: 99%

A Novel Laser-Aided Machining and Polishing Process for Additive Manufacturing Materials with Multiple Endmill Emulating Scan Patterns

et al. 2021

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In additive manufacturing (AM), the surface roughness of the deposited parts remains significantly higher than the admissible range for most applications. Additionally, the surface topography of AM parts exhibits waviness profiles between tracks and layers. Therefore, post-processing is indispensable to improve surface quality. Laser-aided machining and polishing can be effective surface improvement processes that can be used due to their availability as the primary energy sources in many metal AM processes. While the initial roughness and waviness of the surface of most AM parts are very high, to achieve dimensional accuracy and minimize roughness, a high input energy density is required during machining and polishing processes although such high energy density may induce process defects and escalate the phenomenon of wavelength asperities. In this paper, we propose a systematic approach to eliminate waviness and reduce surface roughness with the combination of laser-aided machining, macro-polishing, and micro-polishing processes. While machining reduces the initial waviness, low energy density during polishing can minimize this further. The average roughness (Ra=1.11μm) achieved in this study with optimized process parameters for both machining and polishing demonstrates a greater than 97% reduction in roughness when compared to the as-built part.

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Laser polishing: a review of a constantly growing technology in the surface finishing of components made by additive manufacturing

Gisario

Barletta

Veniali

2022

Int J Adv Manuf Technol

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Additive manufacturing is a vanguard production technology that has contributed greatly to speed up replacing on the market of complex-shaped components. A delicate and unavoidable phase of additive technology is that relating to the post-processing of the components, especially the finishing process. Post-processing needs to be automated and made scalable so that the technology can actually be adopted also for mass production. In this respect, an emerging post-processing technology suitable for surface finishing, not in contact and easily automatable, is the one that involves the use of laser sources, known by the name of laser polishing. Laser polishing is spreading, in fact, more and more strongly, in the field of manufacturing as a valid alternative to conventional technologies for the surface finishing of metallic components obtained by additive processes. Laser polishing is widely considered very suitable to improving the surface finish of metal components. When compared with the conventional finishing technologies, laser polishing has many benefits in terms of costs and process times especially if automated, through the use of CNC systems and scanning heads. In this manuscript, the knowledge of this technology is deepened through a review of the relevant literature that highlights the aspects of the interaction of the laser beam with the metal alloys most frequently used in 3D printing, without neglecting the importance of the thermo-mechanical properties that derive from it. The analysis conducted on the technology of laser polishing aims therefore at evaluating the potential applications in industrial engineering, mainly with regard to the surfaces quality achievable as a result of the polishing of metal components fabricated by additive manufacturing.

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Experimental Analysis of Laser and Scanner Control Parameters During Laser Polishing of H13 Steel

Cited by 14 publications

References 12 publications

Experiment Study of Rapid Laser Polishing of Freeform Steel Surface by Dual-Beam

Experiment Study of Rapid Laser Polishing of Freeform Steel Surface by Dual-Beam

A Novel Laser-Aided Machining and Polishing Process for Additive Manufacturing Materials with Multiple Endmill Emulating Scan Patterns

Laser polishing: a review of a constantly growing technology in the surface finishing of components made by additive manufacturing

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