The quality improvement of laser rubber removal for laminated metal valves

Li, Guang; Gao, Wenyan; Zhang, Lin; Wu, Xin‐Ping; Zhang, Lu; Wei, Zhipeng; Li, Benhai; Xue, Yan; Wang, Junlong; Wang, Xiaohua

doi:10.1016/j.optlastec.2020.106785

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…The maintenance work of removing paint always requires a period with conventional methods such as sandblasting, paint removal solvent, and sanding process [25,26]. Thus, the application of laser for paint removal work is promising for this purpose.…”

Section: Resultsmentioning

confidence: 99%

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

2021

Int. j. technol. eng. stud.

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This research aims to study the effect of nanosecond laser parameters on the paint removal process and obtain a set of parameters that would result in the highest paint removal efficiency. In this study, the effect of laser paint removal parameters such as power, defocus distance, and the number of loops are studied with an optical microscope to observe surface features. The laser paint removal process is conducted using the IPG YLM 200/30 -Q pulsed fiber laser machine. The process sample was examined with an optical microscope to analyze the effectiveness of this laser paint removal process. The results indicated that the power and number of loops significantly enhance the paint removal process. The selection of correct frequency, power, hatching distance, scanning speed, and defocus distance also play a significant part in the efficiency of the laser paint removal process.

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Section: Resultsmentioning

confidence: 99%

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

2021

Int. j. technol. eng. stud.

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“…The absorption of this structure by the subsequent laser irradiation increased sharply to approximately 100%. According to Equation ( 5) and the description of references [13,28,36], the temperature rises on the surface of aluminum alloy material can reach 796.22 • C under the action of 0.2 J/cm 2 laser energy, which exceeds the melting point of aluminum material 660 • C. This can better explain the experimental phenomenon in which the threshold value of a large amount of particle contaminants generated on the surface of the aluminum alloy in Figures 3-5 is near 0.2 J/cm 2 .…”

Section: Discussionmentioning

confidence: 99%

“…In Figure 2a, thermal ablation occurred on the surface of the aluminum alloy under irradiation of a high-energy laser. Under lower laser energy, the thermal ablation effect was less significant, and there was no obvious ablation trace, as shown in Figure 2b [27,28]. However, a clear demarcation line for the laser irradiation could be observed under a microscope.…”

Section: Laser Damage Morphology Microstructurementioning

confidence: 93%

The Characterization of Laser-Induced Particles Generated from Aluminum Alloy in High Power Laser Facility

Miao,

Zhou,

Zhu

et al. 2023

Materials

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Aerosol particle contamination in high-power laser facilities has become a major cause of internal optical component damage resistance and service life reduction. In general, contaminating particles primarily originate from stray light; therefore, it is crucial to investigate the mechanism and dynamics of the dynamic contaminating particle generation to control the cleanliness level. In this study, corresponding research was conducted on experiments and theory. We investigated the particle generation and surface composition modification under the action of a laser. We employed various surface analytical methods to identify the possible variations in the aluminum alloy surface during laser irradiations. A theoretical model for particle ejection from aluminum alloy surfaces was established by taking the adhesion force and laser cleaning force (due to thermal expansion) into account. The results show that the threshold energies for contamination particle generation and damage are around 0.1 and 0.2 J/cm2, respectively. Subsurface impurities are the primary source of particles, and particle adhesion density is related to surface roughness. Pollution particle generation and splashing processes include temperature increases, phase changes, impact diffusion, and adhesion. The results provide a reference for the normal operation of high-energy laser systems. The results also suggest that the laser irradiation pretreatment of aluminum alloy surfaces is essential to improve the cleanliness level.

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“…These studies mainly focused on how to efficiently remove glue below the damage threshold of metal; however, it is necessary to intensively study the influence of laser degumming on the substrate performance. As outlined in our previous essay [ 23 ], thermal effects from laser accumulation still exist, which can lead to changes in metallographic structures, matrix hardness, and even the destruction of the workpiece. The wet-type laser degumming method was difficult to achieve in engineering applications, as it generated waste liquid and caused secondary pollution [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

“…As outlined in our previous essay [ 23 ], thermal effects from laser accumulation still exist, which can lead to changes in metallographic structures, matrix hardness, and even the destruction of the workpiece. The wet-type laser degumming method was difficult to achieve in engineering applications, as it generated waste liquid and caused secondary pollution [ 23 ]. In this paper, we conducted dry-type laser degumming experiments on 2Cr13 stainless valves using a cold air gun to achieve local cooling by heat convection with strong air flow.…”

Section: Introductionmentioning

confidence: 99%

Investigations on 2Cr13 Stainless Valves after Dry-Type Laser Degumming

Zhang

et al. 2022

Micromachines

Self Cite

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The disabled glue on valve surfaces is known to reduce aircraft durability and performance. In this paper, glue contaminants were removed from 2Cr13 stainless valves by dry-type laser processing with a cold air gun and compared with the chemical soaking method. The laser-processed surface was examined by white-light interferometer, scanning electron microscopy, energy dispersive spectroscopy, X-ray diffractometer, hardness tester, and metallographic microscopy. The substrate surface became a little smoother but also had deeper dips due to laser thermal melting. After laser degumming, the new constituent was found in the laser-irradiated region and analyzed as FeCr0.29Ni0.16C0.06, since the ratio of chemical compositions changed. Based on our simulation and experiments, the temperature of the workpiece was effectively controlled by the cold air gun, and its physical properties, including hardness and metallographic structure, were hardly changed. It was shown that laser degumming provides an alternative method for metal valve cleaning.

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The quality improvement of laser rubber removal for laminated metal valves

Cited by 11 publications

References 19 publications

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

The Influence of Nanosecond Fibre Laser on the Removal of Paint on Metallic Surface

The Characterization of Laser-Induced Particles Generated from Aluminum Alloy in High Power Laser Facility

Investigations on 2Cr13 Stainless Valves after Dry-Type Laser Degumming

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