Laser polishing of additive manufactured tool steel components using pulsed or continuous-wave lasers

Yung, Kam Chuen; Zhang, Shishun; Duan, Lingjie; Choy, H. S.; Cai, Zhixiang

doi:10.1007/s00170-019-04205-z

Cited by 58 publications

(18 citation statements)

References 68 publications

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“…In addition, the internal surface of CCC has high surface roughness [ 76 , 77 , 78 ] and result in reduction in mold life due to stress concentration [ 79 , 80 , 81 , 82 ]. Thus, surface improvement of the CCC by abrasive flow machining [ 83 ], electrochemical polishing [ 84 ], chemical polishing [ 85 ], laser polishing [ 86 ], ultrasonic cavitation abrasive finishing [ 87 ], or abrasive blasting [ 88 ] is also an important research topic. These issues are currently being investigated and the results will be presented in a later study.…”

Section: Resultsmentioning

confidence: 99%

Improving Cooling Performance of Injection Molding Tool with Conformal Cooling Channel by Adding Hybrid Fillers

Kuo

2021

Polymers

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Silicone rubber mold (SRM) is capable of reducing the cost and time in a new product development phase and has many applications for the pilot runs. Unfortunately, the SRM after injection molding has a poor cooling efficiency due to its low thermal conductivity. To improve the cooling efficiency, the thermal conductivity of the SRM was improved by adding fillers into the SRM. An optimal recipe for fabricating a high cooling efficiency low-pressure injection mold with conformal cooling channel fabricated by fused deposition modeling technology was proposed and implemented. This study proposes a recipe combining 52.6 wt.% aluminum powder, 5.3 wt.% graphite powder, and 42.1 wt.% liquid silicon rubber can be used to make SRM with excellent cooling efficiency. The price–performance ratio of this SRM made by the proposed recipe is around 55. The thermal conductivity of the SRM made by the proposed recipe can be increased by up to 77.6% compared with convention SRM. In addition, the actual cooling time of the injection molded product can be shortened up to 69.1% compared with the conventional SRM. The actual cooling time obtained by the experiment is in good agreement with the simulation results with the relative error rate about 20%.

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Section: Resultsmentioning

confidence: 99%

Improving Cooling Performance of Injection Molding Tool with Conformal Cooling Channel by Adding Hybrid Fillers

Kuo

2021

Polymers

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“…43,46 According to these two melting methods, the entire laser polishing process can be divided into coarse polishing (based on the SOM mechanism) and delicate polishing (based on the SSM mechanism). Yung et al 47 combined the two mechanisms to carry out coarse and delicate polishing for tool steel, that is, polishing the same workpiece twice. The results showed that the roughness decreased from the original 12 to 0.7 μm.…”

Section: Laser Polishing Mechanismmentioning

confidence: 99%

Laser polishing of additive manufactured Ti6Al4V alloy: a review

Zuo

2021

Opt. Eng.

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Additive manufactured Ti6Al4V alloy has excellent comprehensive properties and has broad application prospects in the aerospace, biomedicine, and other fields. However, the fabricated components are too rough to use directly. So, a corresponding postprocess is needed urgently. The conventional finishing process cannot meet the requirements of green and efficient processing because of its time consumption, environmental pollution, and low productivity. Laser polishing, as a highly efficient and noncontact post-treatment technology, has attracted more and more attention in the polishing of additive manufactured Ti6Al4V alloy. The research of laser polishing of Ti6Al4V alloy in recent years has expatiated and includes laser polishing mechanisms, surface roughness and morphology, microstructure, mechanical properties, and finite element simulation analysis during laser polishing. Furthermore, the existing challenges of laser-polished Ti6Al4V alloy are summarized, and future development directions are proposed.

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“…By substituting the orthogonal experimental results into Eq. (20) and Eq. (21), the range analysis results of the surface roughness of the 304 stainless steel after UVLP processing are shown in Table 8 and Fig.…”

Section: B Range Analysis Of Orthogonal Experimentsmentioning

confidence: 99%

“…Ramos and Bourell [19] proposed that laser polishing metal materials should be divided into two processes: shallow surface melting (SSM) and surface over melt (SOM). Yung et al [20] used pulsed lasers and continuous-wave lasers to polish tool steel components respectively under different technological conditions and obtained excellent surface quality. Mai and Lim [21] studied laser polishing of 304 stainless steel and analyzed the surface morphology, reflectivity, hardness, and corrosion resistance of 304 stainless steel after polishing.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study of Ultrasonic Vibration-Assisted Laser Polishing 304 Stainless Steel

Kang

Zou

et al. 2020

IEEE Access

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With the increasing requirements for the surface quality of the workpiece, many kinds of hybrid manufacturing have developed recently. Ultrasonic vibration-assisted laser polishing (UVLP) is a new hybrid manufacturing method. Different from the traditional method of applying ultrasonic vibration on the workpiece, this paper applies ultrasonic vibration on the lens. Besides, the thermal mechanisms of the 304 stainless steel polished by traditional laser polishing (TLP) and UVLP were analyzed to reveal the influence of ultrasonic vibration on the polishing effect. The ultrasonic vibration lens transforms the laser polishing into an intermittent polishing process, which affects the laser energy density and the quality of the polished surface. This research was focused on the experimental analysis of the surface morphology and surface roughness of the 304 stainless steel that was processed by UVLP, and compared with TLP. And the effects of laser power, scanning speed, focus offset, and amplitude on the quality of the polished surface were obtained. The preferred process parameters of UVLP 304 stainless steel were obtained by the range analysis and variance analysis of the orthogonal experiment. Experimental results have shown that UVLP can reduce the surface roughness of 304 stainless steel from 2.777 μm to 0.512 μm at most. Thermal mechanism analysis results were verified by experimental results. Choosing appropriate processing parameters can effectively improve the quality of the polished surface, making the processing effect of UVLP significantly better than TLP.

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Laser polishing of additive manufactured tool steel components using pulsed or continuous-wave lasers

Cited by 58 publications

References 68 publications

Improving Cooling Performance of Injection Molding Tool with Conformal Cooling Channel by Adding Hybrid Fillers

Improving Cooling Performance of Injection Molding Tool with Conformal Cooling Channel by Adding Hybrid Fillers

Laser polishing of additive manufactured Ti6Al4V alloy: a review

Theoretical and Experimental Study of Ultrasonic Vibration-Assisted Laser Polishing 304 Stainless Steel

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