Article
Engineering, Mechanical
Lei Cao, Xu Li, Qinglong Wang, Dianhua Zhang
Summary: This work discusses the importance of the friction characteristics of rolling interface in rolling stability, introduces a new unsteady lubrication model, develops a dynamic chatter model, analyzes the main process parameters affecting mill stability, and investigates the changes in parameters and tribological characteristics during unstable rolling processes. The conclusion is that the rapid changes in lubrication state and friction stress lead to intensified vibration.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Zhi-ying Gao, Bo Tian, Yang Liu, Li-yuan Zhang, Mao-lin Liao
Summary: The study focused on chatter instability in a 5-stand cold tandem rolling mill and successfully suppressed the chatter while improving rolling efficiency through an optimization model, providing valuable insights for intelligent manufacturing of the rolling process.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Yan-li Xin, Zhi-ying Gao, Bo Tian, Qing-dong Zhang
Summary: This article introduces the deterioration of equipment and product quality caused by chatter or slip instability in the high-speed cold tandem rolling process of thin plate, and proposes a novel approach to calculate the speed-dependent friction coefficient. The influence of friction coefficient on the instability of slip and chatter is investigated, and technical strategies are proposed to suppress these instabilities in the actual rolling process.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Engineering, Manufacturing
Jianlin Sun, Yanan Meng, Boming Zhang
Summary: The dispersion of nano-MoO3 in water reduces friction coefficients and wear volume, while increasing loadbearing capacity. The optimal concentration of MoO3 additive in water-based fluid is found to be 0.4 wt.%.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Mechanical
L. J. M. Jacobs, K. N. H. Van Dam, D. J. Wentink, M. B. De Rooij, J. Van der Lugt, D. J. Schipper, J. P. M. Hoefnagels
Summary: An integrated digital image correlation method was used to analyze the cold rolling process, which provided clear visualization of the geometry of the roll bite and the inlet zone. The study revealed a novel finding that, despite the use of coils and entry tension, the strip can enter the rolling mill asymmetrically, resulting in an uneven lubricant film thickness between the top and bottom strip surfaces.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Xing Lu, Jie Sun, Zhen Wei, Guangtao Li, Dianhua Zhang
Summary: This paper introduces a new model to predict the minimum friction coefficient in rolling mills, improving friction balance and designing optimal rolling conditions to expand the stability range of the friction.
TRIBOLOGY INTERNATIONAL
(2021)
Review
Materials Science, Multidisciplinary
Chuhan Wu, Liangchi Zhang, Peilei Qu, Shanqing Li, Zhenglian Jiang
Summary: The paper provides a comprehensive review on the multiscale characterisation of interface stresses in cold rolling, considering factors such as random asperity deformation and lubrication. It discusses multiscale modelling of rolling under different lubrication regimes and summarizes open problems for further studies in the field.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Automation & Control Systems
Wenying Zeng, Jinkuan Wang, Yan Zhang, Yinghua Han, Qiang Zhao
Summary: This paper presents a model-free controller based on Deep Deterministic Policy Gradient (DDPG) for thickness and tension control in the unsteady rolling process of cold rolling. By utilizing strategies such as dividing state space variables with the mechanism model, defining reward function and state normalization, the DDPG controller copes with random disturbance and complex uncertainties, achieving better accuracy, stability, and rapidity than the proportional integral (PI) controller.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Wei Wang, Penghui Gong, Tingli Hou, Qingjuan Wang, Yuan Gao, Kuaishe Wang
Summary: The BP/TiO2 nanocomposites as water-based lubrication additives show promising results in reducing friction coefficient and wear rate, as well as decreasing rolling force and surface roughness during the rolling process.
Article
Engineering, Mechanical
Chuhan Wu, Liangchi Zhang, Peilei Qu, Shanqing Li, Zhenglian Jiang
Summary: This research investigates the effects of elastic work rolls on the hydrodynamic lubrication of high-speed rolling of hard steel strips using an innovative numerical method and finite element analysis. The analysis demonstrates that the hydrodynamic pressure is more affected by the yield strength of the metal strip and roll radius in lubricated strip rolling with a fixed rolling gap.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Automation & Control Systems
Zoheir Babajamali, Mohamad Khaje Khabaz, Farshid Aghadavoudi, Fatemeh Farhatnia, S. Ali Eftekhari, Davood Toghraie
Summary: This paper investigates the multi-objective optimization of tandem cold rolling settings for reductions and inter-stand tensions using NSGA-II and Pareto-optimal front. The study suggests total power consumption and uniform power distribution as objective functions and selects reduction thicknesses and inter-stand tensions as problem decision variables. The paper introduces analytical formulations to determine rolling forces and power and defines the main variables, objective functions, and constraints for the optimization problem. The results show improved performance compared to the initial rolling line settings and propose an optimized rolling schedule with reduced power consumption and more uniform power distribution.
Article
Automation & Control Systems
Pengfei Wang, Jiannan Li, Xu Li, Shuwei Duan, Huagui Huang, Dewei Wang
Summary: In this study, a multi-objective optimization-based multi-stand coordinated control strategy and model have been proposed to improve the edge drop in cold rolling of silicon steel strip. The influence of each control stand work roll shifting on edge drop has been analyzed using a finite element model, and the control effectiveness of each work roll shifting actuator has been determined. A fitting model has been proposed to solve the limitation caused by the discrete change of efficiency factors in optimal adjustments. Based on this, a target model for edge drop control and an optimal adjustment model for work roll shifting of each stand have been formulated. A multi-objective optimal model for edge drop control has been established through the overall modeling method, and an improved penalty function algorithm has been developed to calculate the optimal adjustments. Experimental results show that the proposed strategy and model effectively improve the accuracy of edge drop control in silicon steel continuous cold rolling.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Industrial
Dominik Boemer, Yves Carretta, Maxime Laugier, Nicolas Legrand, Luc Papeleux, Romain Boman, Jean-Philippe Ponthot
Summary: This article introduces an advanced lubricated cold rolling model and validates it with a comprehensive data set, demonstrating the ability to predict the effects of various operating conditions on parameters such as rolling force and forward slip. The model requires calibration of specific parameters for each rolled product to accurately predict these effects.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Dong-xiao Hou, Liang Xu, Pei-ming Shi
Summary: A complex dynamic model was established based on the lubricant film thickness, vibrational forces, and main resonance equation in the rolling process. Numerical simulations were conducted to analyze the system's response curves under different conditions, providing theoretical support for mitigating rolling mill vibrations.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Takeshi Yamamoto
Summary: This study focuses on using a high-speed electric motor with a small reducer to achieve high-power transmission efficiency. By using a traction drive, which has low vibration noise, as the transmission element for high-speed reducers. The research developed a model that takes into account transient temperature changes and micro-surface geometry to increase the traction coefficient using a surface texture. Experimental results showed that the designed texture improved the traction coefficient by up to 19%.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Chemistry, Physical
Hamid Reza Hajibagheri, Ali Heidari, Rasool Amini
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Automation & Control Systems
Mohammad Reza Niroomand, Mohammad Reza Forouzan, Ali Heidari
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2019)
Article
Engineering, Mechanical
Behnam Hajshirmohammadi, Mohammad Reza Forouzan, Ali Heidari
TRIBOLOGY TRANSACTIONS
(2019)
Article
Engineering, Biomedical
Mohammad Reza Niroomand, Masoud Arabbeiki
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE
(2019)
Article
Engineering, Mechanical
Navid Ansaripour, Ali Heidari, Seyed Ali Eftekhari
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Wei-Mao Qian, Mohammad Hossein Vahid, Yu-Liang Sun, Ali Heidari, Reza Barbaz-Isfahani, Saeed Saber-Samandari, Amirsalar Khandan, Davood Toghraie
Summary: In this study, glass/epoxy nanocomposites reinforced with carbon nanotubes were fabricated and their mechanical properties were tested using tensile and bending tests. The results showed that samples reinforced with functionalized SWCNT exhibited better mechanical performance. Molecular Dynamics simulations confirmed the trends observed in the experimental results.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Biomedical
Xinmin Dong, Ali Heidari, Amin Mansouri, Wang Shen Hao, Mohammad Dehghani, Saeed Saber-Samandari, Davood Toghraie, Amirsalar Khandan
Summary: The fabrication of porous scaffold using synergic methods like 3D printing and freeze-drying technology improves the mechanical strength and biological behavior of bone implants. The combination of bioactive ceramic and polymer in the scaffold provides sufficient mechanical performance and healing properties for orthopedic applications.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ali Moradi, Ali Heidari, Kamran Amini, Farshid Aghadavoudi, Reza Abedinzadeh
Summary: Shot peening is a surface treatment process used to improve the mechanical properties of metallic alloys. Molecular dynamics simulation was used to study the effects of sphere particle diameter and impact velocity on residual stress and mechanical properties of titanium alloy Ti-6Al-4V. The study found that particle diameter, velocity, and molecular potential functions have a significant impact on residual stress, hardness, and surface roughness of the simulated titanium surface layer.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Mojtaba Momeni, Kamran Amini, Ali Heidari, Mohammad Khodaei
Summary: In this study, nano-biocomposites of polycaprolactone (PCL) and nanofluorapatite (nFA) were prepared and used for 3D printing scaffold fabrication. The analysis results confirmed the even distribution of nFA particles in the PCL matrix without chemical interaction. The addition of nFA improved the thermal and mechanical properties of the composites, with the best performance achieved in the PCL/20nFA composite.
JOURNAL OF BIONIC ENGINEERING
(2022)
Article
Materials Science, Characterization & Testing
X. Li, A. Heidari, S. M. Nourbakhsh, R. Mohammadi, D. Semiromi
Summary: This study investigates the strengthening of intervertebral discs using 3D printing technique, examines the mechanical properties and biological behavior of artificial discs, and analyzes the behavior of the artificial discs under different loads using Finite Element Method.
Article
Materials Science, Multidisciplinary
Ali Moradi, Ali Heidari, Kamran Amini, Farshid Aghadavoudi, Reza Abedinzadeh
Summary: Shot peening is a method to improve the mechanical properties of the surface. This study investigated the effects of shot peening parameters on the residual stress and mechanical properties of Ti-6Al-4V surface. The results showed that shot peening significantly increased the hardness and wear resistance of the material, and the impinging angle played a key role in the process.
KOVOVE MATERIALY-METALLIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Mojtaba Soleimanipour, Reza Abedinzadeh, Ali Heidari, Seyyed Ali Eftekhari
Summary: The study presents a numerical model for the friction stir extrusion process to produce wire from AA1050 aluminum alloy. The model was developed using finite element analysis and validated against experimental temperature measurements. The effect of process parameters on the outputs was investigated using Taguchi experiment design method and an orthogonal array.
Article
Metallurgy & Metallurgical Engineering
Ali Moradi, Ali Heidari, Kamran Amini, Farshid Aghadavoudi, Reza Abedinzadeh
Summary: Shot peening improves the microstructure, hardness, wear resistance, surface roughness, and compressive residual stress of Ti-6Al-4V alloy. The treatment refines grains and creates a compact layer of nanostructure on the surface, leading to significant improvements in surface properties.
METALLURGICAL RESEARCH & TECHNOLOGY
(2022)