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Laser Polishing of Directed Energy Deposition Metal Parts:A Review

Additive Manufacturing Frontiers 2024年第4期3卷 141-154页

作者： Baosheng Guan Lanyun Qin Guang Yang Yuhang Ren Xiangming Wang School of Mechatronics Engineering Shenyang Aerospace UniversityShenyang110136China Key Laboratory of Rapid Development&Manufacturing Technology for Aircraft(Shenyang Aerospace University) Ministry of EducationShenyang110136China Shenyang Aircraft Design Institute Shenyang110035China

Additive manufacturing(AM)is a reliable technique for constructing highly complex metallic *** energy deposition(DED)is one of the most common technologies used for AM-printed metal ***,issues such as weak binding,poor accuracy,and rough surfaces still affect the final *** limitations in the metal-feed DED process indicate that post-processing techniques are required to achieve high quality in terms of both mechanical properties and surface *** contact-based post-processing methods have several drawbacks,including difficulties in accessing complex shapes,environmental impact,high time consumption and cost,and health risks for *** address these problems and improve surface quality,a laser polishing process has been *** melting or ablating the material with a laser,the laser-polishing process enables the smoothing of the initial *** should be noted that there are currently no reviews focusing specifically on laser polishing as a surface treatment technology for the DED ***,this review presents a unique examination of the mechanisms and primary user-set parameters for both continuous wave(CW)and pulsed laser *** objective is to demonstrate the capabilities of each process and the benefits of using them for the surfaces of DED metal ***,existing knowledge and technology gaps are identified,and future research directions are discussed.

关键词： Additive manufacturing Surface finishing Direct energy deposition Continuous wave laser polishing Pulsed laser polishing

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Towards the development of Resilient Manufacturing Systems: A Systematic Literature Review

Towards the Development of Resilient Manufacturing Systems: ...

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2024 International Conference on Science, Engineering and Business for Driving Sustainable development Goals, SEB4SDG 2024

作者： Magodi, Yvonne Daniyan, Ilesanmi Mpofu, Khumbulani Ale, Felix Tshwane University of Technology Department of Industrial Engineering Pretoria South Africa Achievers University Department of Mechanical & Mechatronics Engineering Owo Nigeria National Space Research & Development Agency Department of Engineering & Space Systems Abuja Nigeria

ISBN: (纸本)9798350358155

In this era of global competitiveness, volatility, and uncertainty there is an increasing quest for the development of resilient manufacturing systems that are resistant to disruptions or that are quick to recover from disruptions. Resilient manufacturing systems are crucial, and this was accentuated during the covid-19 pandemic and the war between Russia and Ukraine, where global value chains were severely disrupted. These events exposed the loopholes in the manufacturing system and presented a gap to improve the manufacturing systems. This study reviewed some existing solutions geared towards achieving resilient manufacturing. A systematic literature review method was used to gather information on the state of the art and the requirements necessary for the development of resilient manufacturing systems. The reviewed literature inclines to the use of big data analytics, machine learning and artificial intelligence as viable options to achieving resilient manufacturing. This study also highlights different resilient manufacturing frameworks and approaches that manufacturing industries can adopt or adjust based on their unique requirements. Future studies can consider the application of resilient manufacturing strategies to achieve a robust manufacturing system using a specific case study. © 2024 IEEE.

关键词： Smart manufacturing

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A Novel Rehabilitative Soft Robotics Knee Brace for ACL deficient patients

A Novel Rehabilitative Soft Robotics Knee Brace for ACL defi...

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Human-Computer Interaction, Optimization and Robotic Applications (HORA), International Congress on

作者： Hamid Naghibi Husain Khambati Andrea Ryolo Momen Abayazid Robotics and Mechatronics Group University of Twente Enschede The Netherlands VDL Enabling Technology Group Technology and Development Eindhoven The Netherlands

ISBN: (数字)9798350394634

ISBN: (纸本)9798350394641

Anterior Cruciate Ligament rupture is one of the most common injuries contributing to osteoarthritis progression due to knee motion alteration. Reconstructive surgery often fails to recover the intact knee stability. Rehabilitative treatments as a non-invasive solution can used to strengthen the Hamstring muscles which contributes to the anterior-posterior stability. These exercises are very time and cost expensive . in order to overcome the non-effective passive knee braces in the market, in the current study A soft robotics knee brace was developed in order to improve anterior-posterior stability by contributing to Hamstring muscles group activation. The soft robotics knee brace can be actuated inside MRI which enables direct evaluation of the effectiveness. In order to validate the effectiveness of the developed knee brace two experiments were performed, seated leg curl and gait analysis. The outcomes confirmed that the soft robotics knee brace could reduce the Hamstring group activation.

关键词： Knee Magnetic resonance imaging Surgery Soft robotics Muscles Potentiometers Stability analysis

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High Precise Laser Glass Cutting for Future Display 59th

High Precise Laser Glass Cutting for Future Display

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59th International Symposium, Seminar and Exhibition, Display Week 2022

作者： Jung, Woohyun Kim, Hyungsik Voronov, Alexander Park, Sunggyu Ryu, Jekil Jeong, Seongho Roh, Cheoilae Equipment Core Technology Development Team Mechatronics Technology Research Center Samsung Display 1 Samsung-ro Giheung-gu Youngin-si17713 Korea Republic of

As one of the various attempts to reduce the size of display bezel, high-precision glass cutting process is required to be developed for future displays. In this study, the Bessel-beam Laser Cutting (BLC) process has been studied, which is capable of minimizing the thermal deformation of the black matrix (BM) material on glass. In an experimental setup composed of IR ps laser with bessel-beam optics, the smallest thermal degradation of BM and the highest cutting precision are achieved as 40pm and 10pm, respectively. When reducing thermal effects caused by high-order beams without sacrificing glass breaking strength, effective heat affected zone (HAZ) could be reduced nearby 30um width from the cutting line. This high precision cutting technology will contribute to realize extremely narrow bezel display near future. © 2022 SID.

关键词： Laser materials processing

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Photoacoustic endoscopic probe based on lens scanning using a laterally tunable electrowetting liquid lens

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Optics Express 2025年第10期33卷 21016-21029页

作者： Seo, Seungwan Lee, Kiri Yoo, Sung Keun Eom, Jonghyun Park, Yangkyu Medical Device Development Center OSONG Medical Innovation Foundation Cheongju-si28160 Korea Republic of Intelligent Technology Research Center Korea Photonics Technology Institute Gwangju61007 Korea Republic of Department of Mechatronics Engineering Chonnam National University 50 Daehak-ro Jeonnam Yeosu59626 Korea Republic of Corporate Growth Support Center Jeonnam Yeosu Industry-University Convergence Agency 17 Samdong 3-gil Chonnam Yeosu59631 Korea Republic of

Most existing photoacoustic endoscopies (PAEs) rely on external scanning methods, which can result in a bulky and complex probe. We propose a laterally tunable liquid lens that enables direct focal point shifting, eliminating the need for an external scanning mirror. This reduces system size and enhances endoscopic applications. Ray tracing analysis and experiments confirmed the lens’s tunability, achieving 20 mm axial shifting and 4.42° lateral tilting at 45.3 Vrms. Integrated into a probe, the lens significantly improved photoacoustic imaging, yielding nearly four times the signal intensity of conventional stage scanning. Therefore, the proposed lens holds great potential for compact PAE. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Endoscopy

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88-3: Fast Selective Laser-Induced Etching and Asymmetric 3D Hologram Laser Beam for Narrow Bezel Thin Display†

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SID Symposium Digest of Technical Papers 2024年第1期55卷 1226-1229页

作者： Hyungsik Kim Jeongho Kim Konstantin Mishchik Seunghoon Jang Seyeon Hwang Kisang Lee Woohyun Jung Junghwa You Jekil Ryu Seongho Jeong Cheollae Roh Equipment Core Technology Development Team Mechatronics Technology Center Samsung Display 1 Samsung-ro Giheung-gu Youngin-si Gyeonggi-do 17713 South Korea

Here we demonstrate fast selective laser-induced etching (SLE) process with three-dimensional (3D) hologram optics to reduce display bezel thickness with cost effective methods. To apply fast SLE for display manufacturing, one-side etching process should be presumed to protect display active area. We developed one-side selective laser-induced etching with asymmetric 3D hologram laser beam satisfying with commercial mechanical strength. Faster etch process having etch rate 10 µm/min than common SLE, 1~3 µm/min was developed. Furthermore, we achieve that bezel thickness is 100 µm shorter than wheel scribing and CNC grinding.

关键词： Selective laser-induced etching (SLE) Diffractive optics Hologram optics Laser materials processing Laser cutting Micro machining Transparent materials Glass etching

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Assessment of Carbon Fibre Composites for Product development in Aerospace and Transportation Industries

Assessment of Carbon Fibre Composites for Product Developmen...

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2024 International Conference on Science, Engineering and Business for Driving Sustainable development Goals, SEB4SDG 2024

作者： Ogundare, Korede J. Ale, Felix Yusuf, Olatunbosun T. Olatoyinbo, Seyi F. Daniyan, Ilesanmi A. African University of Science & Technology Department of Systems Engineering Institute of Space Science & Engineering Abuja FCT Nigeria National Space Research and Development Agency Abuja FCT Nigeria Achievers University Department of Mechanical & Mechatronics Engineering Ondo State Owo Nigeria

ISBN: (纸本)9798350358155

The need to develop high-performing materials coupled with effective component recovery into service at the end-of-life (EOL) is essential to reduce waste generation and achieve a circular economy. Less-performing materials may promote indiscriminate disposal of components made from them at the end of their life, thereby increasing the cost of manufacturing. It can also make the environment less friendly. This study assesses the applicability of carbon fibre composites for product development in the aerospace and transportation sectors. A literature review on carbon fibre applications in the transportation and aerospace sectors was conducted. The study also presents a process design for processing carbon fibre with a potential for energy saving. The findings indicate that carbon fibre boasts of a high strength-to-weight ratio and thus suitable for transportation and aviation applications. However, its processing is energy-intensive and has no effective recycling options. This study also provides theoretical and empirical findings drawn from the literature on the feasibility of fibre composites for component development in the aerospace and transportation industries. The results and findings of this study can promote manufacturing sustainability and the concept of circular economy with improvement in the performance and useful life of components developed from carbon fibre. It can also assist the manufacturing industries in making effective decisions relating to component recovery. © 2024 IEEE.

关键词： Circular economy

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Design and Static Analysis of a High-performance Float Arm of Wave Energy Converter 32nd

Design and Static Analysis of a High-performance Float Arm o...

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32nd International Ocean and Polar Engineering Conference, ISOPE 2022

作者： He, Guanghua Liu, Chaogang Yu, Hai Zhang, Zhigang Luan, Zhengxiao He, Yang School of Mechatronics Engineering Harbin Institute of Technology Heilongjiang Harbin China Weihai Science and Technology Innovation Development Center Shandong Weihai China Shandong Institute of Shipbuilding Technology Shandong Weihai China

ISBN: (纸本)9781880653814

Based on the engineering background of the point-absorber wave energy converter (WEC), a variable-section float arm of the WEC is proposed. To obtain the basic mechanical properties of the structure under the wave load, the overlapping-grid technology is used to carry out the hydrodynamic analysis of the float by the commercial software STAR-CCM+, and the stress analyses of a constant-section float arm and a variable-section float arm are carried out by another commercial software ABAQUS. The results show that: both the stress peaks of the constant-section float arm and the variable-section float arm appear at the connection between the float arm and the base, where stress concentration is easy to happen. The float arm should be reinforced here in the design and manufacture. The stress peak and deflection peak of the variable-section float arm proposed in the present study are lower than those of the constant-section float arm. The high-stress area of the variable-section float arm is smaller than that of the constant-section float arm, and the stress distribution is effectively improved. Compared with the constant-section float arm, the variable-section float arm has better bending resistance and reliability, and can adapt to a more complex marine environment. © 2022 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Static analysis

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Analysis of double diamond scissor-like isolator structure for passive vibration isolation of seating suspension system

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International Journal of Vehicle Noise and Vibration 2022年第3-4期18卷 139-165页

作者： Guo, Linchuan Bi, Fengrong Shu, Hongli Wang, Xu School of Engineering RMIT University Australia School of Mechanical Engineering Tianjin University Tianjin100083 China Jiangxi Professional Institute of Mechatronics Technology Nanchang North Development District ICP 05001964 Fenglin Road Jiangxi330013 China

This paper aims to identify the critical design parameters that affect the peak transmissibility ratio of seating suspension system and study the design parameter sensitivity. The design parameter sensitivity analysis can be applied for seat cushion design. The analytical model of the double diamond scissor-like isolator structure has been developed and validated by the MSC ADAMS simulation model. The driver’s head accelerations are simulated on the different ISO road classes and compared with the peak transmissibility ratio to evaluate the vibration isolation performance. The effects of structural parameters in the proposed system have also been studied through the validated analytical model to find out how to adjust the parameters to provide better vibration isolation performance. Copyright © 2022 Inderscience Enterprises Ltd.

关键词： Analytical models

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Heart Rate-Based Prediction of Daily Activity Levels Using Wearable Devices for Home Rehabilitation Process of Cardiac Patients 11

Heart Rate-Based Prediction of Daily Activity Levels Using W...

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11th International Conference on Electrical and Electronics Engineering, ICEEE 2024

作者： Yayli, Sahika Betul Yetimova, Yasemin Ozkan, Isil Balci, Ibrahim Cem Sayin, Irem Salturk, Serkan Aydin, Ipek Ebeoglu, Abdullah Omer Barman, Hasan Ali Uvet, Huseyin Artificial Intelligence & Digital Analytic Solutions Turkcell Technology Istanbul Turkey Rd Strategy and Business Development Turkcell Technology Istanbul Turkey Yildiz Technical University Department of Mechatronics Engineering Istanbul Turkey Yildiz Technical University Department of Informatics Istanbul Turkey Istanbul University - Cerrahpasa Faculty of Medicine Istanbul Turkey

ISBN: (纸本)9798350362541

This study aims to contribute to the literature by developing an advanced Long Short-Term Memory (LSTM) model that classifies and predicts the duration of patients' daily physical activities (resting, light, moderate, intense) using heart rate data. This approach is an innovative step towards personalizing cardiac rehabilitation programs and accurately monitoring patients' daily activity levels. The application of this model aims to allow healthcare professionals to objectively track patients' activity levels. Data collection was conducted at the Istanbul University - Cerrahpaşa, Cardiology Institute exercise test laboratory during the years 2023-2024. Heart rate (bpm) of the patients was recorded through a Garmin watch worn on the wrist during exercise tests conducted using the Modified Bruce Protocol. The study included patients aged between 18 and 85 with medium-risk pre-test probability for coronary artery disease. The collected data underwent preprocessing, including synchronization of heart rate data with exercise test records and removal of inconsistent or illogical data points. LSTM model was chosen for analyzing sequential data related to heart rate over time. The model consisted of two LSTM layers and one output layer, achieving a prediction accuracy of 59.1% on the test dataset. Further efforts are underway to enhance the model's performance within the project scope. This research underscores the importance of objective activity tracking and highlights the potential to fill existing gaps in this field. The developed model, based on heart rate data collected via wearables, is expected to serve as an objective tool for monitoring cardiac rehabilitation processes and daily activity levels. By evaluating data collected through wearables, the model facilitates the calculation of individuals' durations of rest, light, moderate, and high-intensity activities throughout the day, contributing to personalized health care practices. © 2024 IEEE.

关键词： Heart

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