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Journal of Beijing Institute of Technology 2023年第5期32卷 640-652页

作者： Li Jiang Tao Wang qingxue huang School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China College of Intelligent Manufacturing Chengdu Technological UniversityChengdu 611730China College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China

In this paper,the main researches are focused on the horizontal nonlinear vibration characteristics of roll systems for rolling mill,mainly including the study of forced vibration and free vibration of the roller.Firstly,the nonlinear damping parameters and nonlinear stiffness parameters within interface of the rolling mill are both considered,and a fractional-order differential term is also introduced to model the horizontal nonlinear vibration.Secondly,the averaging method is introduced to solve the forced vibration system of the mill roll system,and the amplitude-frequency characteristic curves of the system are obtained for different orders,external excitation amplitudes,stiffness and fractional order coefficients.Thirdly,the amplitude-frequency and phasefrequency characteristics of the free vibration of the mill roll system are investigated at different fractional orders.Then,the accuracy of the averaging method for solving the dynamic characteristics of the system is verified by numerical analysis,and the effect of the fractional differential term coefficients and order on the dynamic characteristics of the roll system are investigated.Finally,the time-frequency characteristics and phase-frequency characteristics of free vibration systems at different fractional orders are studied.The validity of the theoretical study is also verified through experiments.

关键词： roller system fractional-order average method forced vibration free vibration

Recent advances and trends in roll bonding process and bonding model:A review

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Chinese Journal of Aeronautics 2023年第4期36卷 36-74页

作者： Zixuan LI Shahed REZAEI Tao WANG Jianchao HAN Xuedao SHU Zbigniew PATER qingxue huang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030002China Institute of Materials Science Technische Universita¨t DarmstadtDarmstadt 64287Germany Faculty of Mechanical Engineering&Mechanics Ningbo UniversityNingbo 315211China Faculty of Mechanical Engineering Lublin University of TechnologyLublin20618Poland

This review presents a thorough survey of the roll bonding process with a focus on the bimetallic bars/tubes as well as the bonding models and criteria.The review aims to provide insight into cold,hot and cryogenic bonding mechanisms at the micro and atomic scale and act as a guide for researchers working on roll bonding,other joining processes and bonding simulation.Mean-while,the shortcomings of roll bonding processes are presented from the aspect of formable shapes,while bonding models are shown from the aspect of calculation time,convergence,interface behav-ior of dissimilar materials as well as hot bonding status prediction.Two well-accepted numerical methodologies of bonding models,namely the contact algorithm and cohesive zone model(CZM)of bonding models and in simulations of the bonding process are highlighted.Particularly,recent advances and trends in the application of the combination of mechanical interlocking and metallurgical bonding,special energy fields,gradient structure,novel materials,green technology and soft computing method in the roll bonding process are also discussed.The challenges for advancing and prospects of the roll bonding process and bonding model are presented in an attempt to shed some light on the future research direction.

关键词： Bimetallic Bonding mechanism Bonding model Numerical simulation Roll bonding process

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 79-92页

作者： Yuanming Liu Zhenhua Wang Tao Wang Jie Sun Xianguang Zheng Dianhua Zhang qingxue huang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT-UOW Joint Research Center Taiyuan University of TechnologyTaiyuan 030024China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

Variable gauge rolling is a new process to obtain a plate for which the thickness changes continuously by continuously and dynamically adjusting the roll gap upward and downward in the rolling process.This technology is an efective method for producing lightweight,low-cost,and economical plates.However,variable gauge rolling is an unsteady process,and the changes in the force and deformation parameters are complex.In this research,based on the minimum energy theory of the variational principle and considering the characteristics of the roll movement and workpiece deformation comprehensively,the internal plastic deformation,friction,shear and tension powers,and the minimum result of the total power functional in upward and downward rolling are obtained with the frst integral and then with a variation of adopting the specifc plastic power and strain rate vector inner product.The analytical results of the deformation and force parameters are also established using the variational method.Then the precision of this model is certifed using the measured values in a medium plate hot rolling plant and the experimental data for Tailor Rolled Blank rolling.Good agreement is found.Additionally,the variation rule of bite angle,neutral angle,and location neutral points are shown,and the change mechanism of the friction parameter on the stress state efect coefcient is given in variable gauge rolling.This research proposes a new mathematical model for rolling process control that provides a scientifc basis and technical support for obtaining an accurate section shape in variable gauge rolling production.

关键词： Variable gauge rolling Analytical solution Roll separating force Energy method Neutral point

Resonance and Bifurcation of Fractional Nonlinear Systems with Power Damping Term for Robot Grinding

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Journal of Beijing Institute of Technology 2023年第1期32卷 23-40页

作者： Wei Shi qingxue huang Jinzhu Zhang Tao Wang Ziliang Li Yanjie Zhang Xiaoyan Xiong College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Institute of Advanced Forming and Intelligent Equipment Taiyuan University of TechnologyTaiyuan 030024China

A fractional nonlinear system with power damping term is introduced to study the forced vibration system in order to solve the resonance and bifurcation problems between grinding wheel and steel bar during robot grinding.The robot,grinding wheel and steel bar are reduced to a spring-damping second-order system model.The implicit function equations of vibration amplitude of the dynamic system with coulomb friction damping,linear damping,square damping and cubic damping are obtained by average method.The stability of the system is analyzed and explained,and the stability condition of the system is proposed.Then,the amplitude-frequency characteristic curves of the system under different fractional differential orders,nonlinear stiffness parameters,fractional differential term coefficients and external excitation amplitude are analyzed.It is shown that the fractional differential term in the dynamic system is the damping characteristic.Then the influence of four kinds of damping on the vibration amplitude of the system under the same parameter is investigated and it is proved that the cubic damping suppresses the vibration of the system to the maximum extent.Finally,based on the idea that the equilibrium point of the system is the constant part of the Fourier series expansion term,the bifurcation behavior caused by the change of damping parameters in linear damping,square damping and cubic damping systems with different values of fractional differential order is investigated.

关键词： robot grinding fractional system average method power damping resonance and bifurcation

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数智化赋能传统产业转型升级

中国科学院院刊 2024年第7期39卷 1183-1190页

作者：臧冀原季桓永黄庆学中国工程院战略咨询中心北京100088 北京信息科技大学经济管理学院北京100192 太原理工大学机械与运载工程学院太原030024

传统产业是经济高质量发展的基本支撑和基本动力,其数智化过程是促进新、旧动能转换和全球价值链跃迁的重要抓手。文章从数字化、网络化、智能化角度解构数智化丰富内涵,在剖析数智化驱动我国传统产业转型升级的机制及路径基础上,分析... 详细信息

传统产业是经济高质量发展的基本支撑和基本动力,其数智化过程是促进新、旧动能转换和全球价值链跃迁的重要抓手。文章从数字化、网络化、智能化角度解构数智化丰富内涵,在剖析数智化驱动我国传统产业转型升级的机制及路径基础上,分析了当前传统产业数智化进程所面临的障碍。文章最后从(1)继续实施大规模技术升级工程,切实降低数智化改造成本;(2)完善赋能平台建设,优化服务评价体系;(3)打通数智化改造堵点,关键核心领域形成突破;(4)建立面向数智化前沿的复合型人才培养机制4个方面提出了数智化赋能传统产业转型升级的对策建议。

关键词：数智化数字化网络化智能化传统产业转型升级

Micro-hydromechanical deep drawing of metal cups with hydraulic pressure effects

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Frontiers of Mechanical Engineering 2018年第1期13卷 66-73页

作者： Liang LUO Zhengyi JIANG Dongbin WEI Xiaogang WANG Cunlong ZHOU qingxue huang School of Mechanical Materials Mechatronic and BiomedicalEngineering University of Wollongong Wollongong NSW 2522Australia School of Electrical Mechanical and Mechatronic System Universityof Technology Sydney NSW 2007 Australia School of Materials Science and Engineering Taiyuan University ofScience and Technology Taiyuan 030024 China

Micro-metal products have recently enjoyed high demand. In addition, metal microforming has drawn increasing attention due to its net-forming capability, batch manufacturing potential, high product quality, and rela- tively low equipment cost. Micro-hydromechanical deep drawing （MHDD）, a typical microforming method, has been developed to take advantage of hydraulic force. With reduced dimensions, the hydraulic pressure development changes; accordingly, the lubrication condition changes from the macroscale to the microscale. A Voronoi-based finite element model is proposed in this paper to consider the change in lubrication in MHDD according to open and closed lubricant pocket theory. Simulation results agree with experimental results concerning drawing force. Changes in friction significantly affect the drawing process and the drawn cups. Moreover, defined wrinkle indexes have been shown to have a complex relationship with hydraulic pressure. High hydraulic pressure can increase the maximum drawing ratio （drawn cup height）, whereas the surface finish represented by the wear is not linearly dependent on the hydraulic pressure due to the wrinkles.

关键词： micro-hydromechanical deep drawing micro-forming size effects lubrication Voronoi

Special issue： Near-net shaping technology

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Frontiers of Mechanical Engineering 2018年第1期13卷 1-2页

作者： Dequn LI Dongming GUO qingxue huang Yanchun LOU State Key Laboratory of Material Processing and Die & Mold Technology Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory for Precision & Non-traditional Machining of Ministry of Education Dalian University of Technology Dalian 116024 China Heavy Machinery Engineering Research Center of Education Ministry Taiyuan University of Science and Technology Taiyuan 030024 China Shenyang Research Institute of Foundry Shenyang 110022 China

Near-net shaping is an efficient, economical and environmentally-friendly approach to manufacture products which are very close to the final shape, reducing the need for surface finishing. It has become more and more important to use raw materials and energy in an optimal way. Near-net shaping technology has attracted increasing attention in both academic and industrial communities, especially in China, because China has become the world＇s largest regional market for main material forming methods, such as casting, forging and injection molding. The main objective of this special issue in Frontiers of Mechanical Engineering is to bring together the leading ideas, experience and research results of academic scientists and researchers on various aspects of near-net shaping technology. This special issue contains eleven papers contributed by prestigious experts from different countries, including four reviews and seven research articles. These papers cover a broad area of the near-net shaping technology,

关键词： Injection molding casting-forging Material forming raw material Forged Energy sources Casting Surface finish

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二十辊轧机辊系耦合振动特性及振动控制

振动与冲击 2024年第7期43卷 278-289页

作者：孔祥岚和东平徐慧东王涛黄庆学太原理工大学机械与运载工程学院太原030024 先进金属复合材料成形技术与装备教育部工程研究中心太原030024

精密极薄带因具备高精度、耐腐蚀、优异表面光洁度等性能,被广泛应用于微制造、微电子等高技术领域。二十辊轧机辊系的耦合振动对极薄带的生产有着重要的影响。考虑到轧制工艺和润滑状态等变化形成非线性轧制界面,建立了一种二十辊轧机... 详细信息

精密极薄带因具备高精度、耐腐蚀、优异表面光洁度等性能,被广泛应用于微制造、微电子等高技术领域。二十辊轧机辊系的耦合振动对极薄带的生产有着重要的影响。考虑到轧制工艺和润滑状态等变化形成非线性轧制界面,建立了一种二十辊轧机辊系耦合动力学模型。应用多尺度法求解主共振和内共振的幅频特性方程,分析了不同参数对幅频特性曲线的影响。基于奇异性理论探究了不同参数与系统分岔的关系。同时,根据李雅普诺夫一次近似稳定性判据,结合系统动相平面相轨迹图,对系统稳定性进行判断分析。然后,基于Washout filter控制器原理设计了一种状态反馈控制器,通过对系统进行状态空间表达式变换,分析了控制增益对幅频特性的影响。利用时域图、相位图、频谱图以及Poincaré截面图进行仿真对比,验证了所设计控制器的可行性和有效性,为二十辊轧机振动及其控制的研究提供了一定的理论指导。

关键词：二十辊轧机非线性轧制界面多尺度法幅频特性稳定性 Washout filter控制器

Experimental Investigation on Micro Deep Drawing of Stainless Steel Foils with Different Microstructural Characteristics

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 179-189页

作者： Jingwei Zhao Tao Wang Fanghui Jia Zhou Li Cunlong Zhou qingxue huang Zhengyi Jiang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT-UOW Joint Research Center Taiyuan University of TechnologyTaiyuan 030024China TYUT-UOW Joint Research Center University of WollongongWollongongNSW 2522Australia School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia Shanxi Provincial Key Laboratory on Metallurgical Device Design and Theory Taiyuan University of Science and TechnologyTaiyuan 030024China

In the present work,austenitic stainless steel(ASS)304 foils with a thickness of 50μm were first annealed at temperatures ranging from 700 to 1100℃for 1 h to obtain different microstructural characteristics.Then the effects of microstructural characteristics on the formability of ASS 304 foils and the quality of drawn cups using micro deep drawing(MDD)were studied,and the mechanism involved was discussed.The results show that the as-received ASS 304 foil has a poor formability and cannot be used to form a cup using MDD.Serious wrinkling problem occurs on the drawn cup,and the height profile distribution on the mouth and the symmetry of the drawn cup is quite non-uniform when the annealing temperature is 700℃.At annealing temperatures of 900 and 950℃,the drawn cups are both characterized with very few wrinkles,and the distribution of height profile,symmetry and mouth thickness are uniform on the mouths of the drawn cups.The wrinkling becomes increasingly significant with a further increase of annealing temperature from 950 to 1100℃.The optimal annealing temperatures obtained in this study are 900 and 950℃for reducing the generation of wrinkling,and therefore improving the quality of drawn cups.With non-optimized microstructure,the distribution of the compressive stress in the circumferential direction of the drawn foils becomes inhomogeneous,which is thought to be the cause of the occurrence of localized deformation till wrinkling during MDD.

关键词： Microforming Micro deep drawing Stainless steel foils Wrinkling Annealing Microstructure

Effect of Mechanical Surface Treatment on the Bonding Mechanism and Properties of Cold‑Rolled Cu/Al Clad Plate

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Chinese Journal of Mechanical Engineering 2020年第5期33卷 212-224页

作者： Jianchao Han Hui Niu Sha Li Zhongkai Ren Yi Jia Tao Wang A.I.Plokhikh qingxue huang College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment Ministry of EducationTaiyuan 030024China TYUT‑UOW Joint Research Centre Taiyuan University of TechnologyTaiyuan 030024China Bauman Moscow State Technical University(BMSTU) Moscow 105005Russian Federation

In the case of valuable cold-rolled Cu/Al clad plates,billet surface treatment before rolling is a significant process that can affect the bonding efficiency and quality.While the current studies primarily focus on the influence of rolling parameters,insufficient attention has been paid to surface treatment.In this study,the effects of mechanical surface treatment on the bonding mechanism and bonding properties of cold-rolled Cu/Al clad plates were investigated.The results showed that different mechanical surface treatments have significant effects on the surface morphology,roughness,and residual stress.In addition,the effect of surface mechanical treatment on bonding quality was also observed to be critical.When the grinding direction was consistent with the rolling direction(RD),the bonding quality of the Cu/Al clad plates was significantly improved.After surface treatment along the RD for 20 s,the Cu/Al clad plates showed the highest shear strength(78 MPa),approximately four times as high as that of the unpolished samples.Simultaneously,the peel strength of this process was also significantly higher than that achieved via the other processes.Finally,on the basis of the surface morphology,roughness,and residual stress,the effect of surface treatment on the bonding mechanism and bonding properties of Cu/Al clad plates was analyzed.This study proposes a deeper understanding of the bonding behavior and bonding mechanism for cold rolled clad plates processed via mechanical surface treatment.

关键词： Cu/Al clad plates Cold rolling bonding Surface treatment Bonding mechanism Bonding property