Article
Polymer Science
Dongwon Yun, Jong-Bong Kim
Summary: This study analyzes the hot embossing process of PMMA film using computational analysis method to quickly find the optimal process conditions. The developed constitutive model considers strain, strain rate, temperature-dependent stress and softening of the flexible film, accurately describing the behavior of PMMA materials. The proposed method allows for a precise analysis of the film change phenomenon during the hot embossing process.
Article
Green & Sustainable Science & Technology
Jianzhi Li, Kang Yang, Guihao Lian, Feng Gong, Gao Yang
Summary: This study proposes a two-stage gravity-assisted hot embossing process for the fabrication of high-quality glass micro-pillar arrays in a rapid and green manner. Experimental results show that by optimizing the process parameters, the embossed glass micro-pillars achieve high transfer ratios in height and diameter, with low surface roughness and minimal warpage. The proposed hot embossing process has strong industrialization potential for producing high-quality glass microstructures more cleanly and sustainably.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Multidisciplinary
Lihua Li, Jian Zhou
Summary: The newly developed hot embossing technique using CBG heating has been successfully applied in the fabrication of microlens arrays, showing high replication fidelity with some geometric warpage. By conducting thermo-mechanical coupled finite element modeling and trial simulations, an appropriate compensation curvature was determined to significantly decrease the warpage in re-embossed microlens arrays. This demonstrates the feasibility of a simulation-oriented compensation scheme to improve the quality of optics embossed by this innovative technique.
Article
Chemistry, Multidisciplinary
Jaishree, A. Bhandari, N. Khatri, Y. K. Mishra, M. S. Goyat
Summary: Over the past few decades, superhydrophobic coatings (SHCs) have attracted scientists and researchers due to their wide range of applications in various fields. Different techniques have been attempted to fabricate SHCs, but most of them have limitations. The hot embossing (HE) technique, however, shows great potential in replicating micro-nanofeatures on polymeric surfaces. This review article focuses on the recent advancements in HE-operated polymeric SHCs and their applications.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Computer Science, Artificial Intelligence
Kuo Lu, Jin Xie, Risen Wang, Lei Li, Wenzhe Li, Yuning Jiang
Summary: This study proposes a method to control microforming accuracy by optical detection of microforming heights in real-time, improving efficiency and precision in the hot-embossing process. Using intelligent algorithms and models, precise adjustment of process parameters is achieved, enabling control of microforming heights within allowable error limits under unstable hot-embossing conditions.
JOURNAL OF INTELLIGENT MANUFACTURING
(2022)
Article
Engineering, Electrical & Electronic
Mohammad Mashhadban Koochaksaraei, Isa Ahmadi, Ramin Hajian, Mohammad Mostafa Mohammadi
Summary: This paper investigates the effects of pressure and temperature on the dimensions of microchannels and proposes the optimal conditions of temperature and pressure for forming microchannels on poly methyl methacrylate (PMMA).
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Xiaomin Huang, Yong Zang, Hongchao Ji, Baoyu Wang, Hailong Duan
Summary: This paper introduces the application and manufacturing process of conjunction gears, focusing on the hot forging process and microstructure changes after forging. Through finite element numerical simulation and experimental research, the optimal forging process parameters are obtained, and the quenched structure after hot forging is observed.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Haifeng Yang, Jingbin Hao, Haoda Wang, Mengsen Ding
Summary: In this study, a new metal micro-mold manufacturing method using laser shock imprinting (LSI) on the surface of metal foil is proposed. The strength of the mold increased after laser shocking, and a copper foil with a flat back was selected as the final metal micro-mold based on analysis and numerical simulation. The metal micro-mold produced via LSI showed high accuracy and molding stability, with potential applications in roll-to-roll hot embossing.
Article
Chemistry, Physical
Tsung-Chia Chen, Jyun-Jie Lian, Cheng-Chi Wang
Summary: This study investigates the influence of different outer diameters, outer threading pitches, tube thicknesses, and friction factors on the stainless steel micro round tube external threading process. The corrected model consistently yields lower torque/stress/strain compared to other models, indicating the applicability of size effect in the forming process.
Article
Chemistry, Physical
Yongqi Lv, Siqi Zhao, Tao Liu, Huichao Cheng, Jinglian Fan, Yuanchun Huang
Summary: In this study, fine-grained pure tungsten was fabricated using a sol drying reduction low-temperature sintering method, and hot isothermal compression tests were performed. The constitutive equation and finite element model were used to investigate the influence of rolling process parameters on temperature, strain, density, and rolling force. The formation mechanism of rolling damage was also analyzed. The results provide guidance for the optimum design of the hot rolling process of pure tungsten.
Article
Engineering, Industrial
Jie Gao, Yujun Deng, Linfa Peng, Peiyun Yi, Zhongqin Lin
Summary: This paper presents the successful preparation of PTFE films with hierarchical structure using micro powder hot embossing (mPHE) process, discusses the influence of processing parameters and particle size on forming qualities, and proposes a dimensionless indicator to describe the hierarchical character and characterize the relationship between wetting states and forming quality. Tests on mechanical and chemical durability verify the practical application value of the prepared PTFE films.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jing Wang, Hua-Min Liu, She-Fei Li, Wan-Jun Chen
Summary: This paper analyzes the cold roll forming of a complex section of stainless steel SUS301L-ST and proposes a floating roll device for complex sections. By using a 3D finite element model and conducting an orthogonal experiment, the optimal parameters for the complex section are derived. The results provide a theoretical basis for practical production.
Article
Mechanics
Fan Zhang, Yaoyao Ye, Mengze Li, Han Wang, Liang Cheng, Qing Wang, Yinglin Ke
Summary: This paper focuses on understanding the evolution mechanism of micro curing residual stress in medium-temperature cured composites (T700/7901) under out-of-plane tension and its impacts on mechanical responses. An integrated multi-scale framework is established to predict the development of micro residual stress during curing, and experimental and analytical methods are used to verify the model. The results reveal the evolution of micro curing residual stress and demonstrate the necessity of considering curing residual stress in designing and evaluating composites.
COMPOSITE STRUCTURES
(2023)
Article
Automation & Control Systems
Hai Gong, Hua Tang, Tao Zhang, Fei Du, Xiaolong Liu, Yunxin Wu
Summary: In this study, the roll bending process was used to reduce the quenched residual stress of a large aluminum alloy ring, resulting in a change from arch-shaped to N-shaped stress distribution and a decrease in residual stress values. The increase in roll winding number improved stress uniformity, while the stress reduction amplitude remained consistent. Analysis of stress and strain distribution after roll bending revealed the mechanism behind the N-shaped residual stress distribution.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Zhongquan Yu, Chundong Zhu, Mingchao Chen, Site Luo, Chong Ma
Summary: This study investigates the double-roll rotary forging technology of large-diameter thin-walled discs by establishing a 3D finite element model. The distribution of stress field and velocity field, as well as the impact of die preheating and initial workpiece size on uniformity and maximum axial load, were studied.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
