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12th International Conference on CYBER technology in Automation, Control, and Intelligent Systems, CYBER 2022

作者： Wang, Hongbo Du, Jiazheng Zhang, Yongshun Tian, Yu Zhang, Dagan Ning, Yuansheng Niu, Jianye Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Yanshan University Qinhuangdao066004 China Academy for Engineering and Technolgy Fudan University Shanghai200433 China Shanghai Clinical Research Center for Aging and Medicine Shanghai200040 China Yanshan University Key Laboratory of Advanced Forging and Stamping Technology Science of Ministry of Education Qinhuangdao066004 China

ISBN: (数字)9781665472678

ISBN: (纸本)9781665472678

In this paper, a finger rehabilitation robot with flexion/extension function is developed. This device consists of a four-finger mechanism and a thumb mechanism. The four-finger mechanism is modular designed, and consists of the metacarpophalangeal joint mechanism and the proximal interphalangeal joint mechanism. The thumb mechanism has an active degree of freedom (DoF). The hardware system and software system of the finger rehabilitation robot were built, and preliminary experiments were carried out, including the passive and active movement of the single joint and the multi-finger movement. The results show the range of motion of this robot can meet the requirements of the rehabilitation, and it is able to carry out active rehabilitation training by means of the human-machine contact force, and it has the ability to realize occupational therapy training for grasping objects in different shapes. © 2022 IEEE.

关键词： Degrees of freedom (mechanics)

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Design and experimental study of the remote control for a novel patient transfer apparatus 5

Design and experimental study of the remote control for a no...

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2020 5th International Seminar on Computer technology, Mechanical and Electrical Engineering, ISCME 2020

作者： Tian, Yu Wang, Hongbo Zhang, Yongshun Tian, Junjie Du, Jiazheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao Hebei China Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao Hebei China

This paper introduces the design of the remote control for a novel patient transfer apparatus. First, the overall design of the control system is put forward based on the working principle, and design requirements of the apparatus. Second, voltage regulator circuit of the remote control based on the MC34063 is designed to fit for the OLED displayer, parameters such as the filter capacitor have been determined. Next, wireless communication unit adopted CC1110 and the communication instruction code is introduced. Then, the interaction interface of the remote control is finished to facilitate the implementation of the adjustment functions. finally, a simulation and a real experiment has been completed, it indicates the correctness of the voltage regulator circuit and the effectiveness of the remote control respectively. © Published under licence by IOP Publishing Ltd.

关键词： Remote control

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Multi-point flexible straightening process by reciprocating bending for metal profiles

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Transactions of Nonferrous Metals Society of China 2021年第7期31卷 2039-2050页

作者： Xue-ying HUANG Jun ZHAO Gao-chao YU Qing-dang MENG Zhen-kai MU Yan-jun LIU Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of EducationYanshan UniversityQinhuangdao 066004China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

A multi-point flexible straightening process characterized by reciprocating bending is ***,the process is analyzed in terms of deformation mechanism and verified by numerical simulations and physical experiments of the straightening of a series of metal profiles with different materials and initial ***,the relationship between the bending radius and the times of reciprocating bending required to unify the curvature is discussed,and the distribution of residual stress after straightening is *** results show that the reciprocating bending process can eliminate the difference of the initial curvature,make the curvature of each section tend to be uniform;the times of reciprocating bending to reach the uniform curvature decreases with the decrease of bending *** straightness of the straightened profile obtained from the experiment and simulation is less than 0.2%,demonstrating a good feasibility of this method.

关键词： multi-point flexibility metal profile reciprocating bending curvature unification over-bending straightening straightness

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Type synthesis of deployable mechanisms for ring truss antenna based on constraint-synthesis method

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Chinese Journal of Aeronautics 2020年第9期33卷 2445-2460页

作者： Bo HAN Yundou XU Jiantao YAO Dong ZHENG Luyao GUO Yongsheng ZHAO Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan UniversityQinhuangdao 066004China Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of National Education Yanshan UniversityQinhuangdao 066004China

Space deployable antenna is the key equipment in realizing the communication and data transmission between the spacecraft and the *** order to enrich the configurations of deployable antennas,the type synthesis of deployable mechanisms for ring truss antenna is conducted in this ***,the principle of the constraint-synthesis method based on screw theory is briefly described,the structure of the ring truss deployable antenna and its folding principle are analyzed,and the ring truss mechanism is divided into upper edges,lower edges and ***,based on the constraint-synthesis method,the type synthesis of the basic unit edges is carried out,a series of basic unit mechanisms are obtained from combining the basic unit edge mechanisms,and five mechanism units with fewer joints and simple structures are ***,simulation models of the five ring truss deployable mechanisms are built in Solidworks and Matlab software,and the deploying process is verified by the movement ***,mechanism characteristics of the five mechanisms are analyzed and discussed,and a prototype is manufactured,verifying the analysis in this *** research provides a new way for the type synthesis of spatial deployable mechanisms,and the ring truss deployable mechanisms obtained in this study can be well applied in the field of aerospace.

关键词： Constraint-synthesis method Deployable mechanism Ring truss antenna Screw theory Type synthesis

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Study on the Microstructure and Properties of Eh40/2205 Interface with Fe, Co, Ni Composite Interlayer

SSRN

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SSRN 2024年

作者： Zhang, Biao Feng, Kangkang Shen, Xiaolong Yi, Yali Jin, Herong School of Mechanical Engineering Yanshan University Qinhuangdao066004 China Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of National Education Yanshan University Qinhuangdao066004 China

The impact of dual and triple-layer composite interlayer (CI), constructed from Fe, Co, and Ni foils, on the microstructure and mechanical properties of the interface of EH40/2205 clad plates was investigated. The findings indicated that all groups of CI had achieved metallurgical bonding between EH40 and 2205. Specifically, the Ni layer, which had been positioned close to the composite layer 2205, had hindered the diffusion of Ni and Cr, enhancing the plasticity of the clad plate. The Fe layer, situated between Ni and Co, had increased the hardness of the CI by 180~190HV through solid solution strengthening. The Co layer, located near the base layer EH40, had been approximately 70HV harder than the Ni layer, increasing the ultimate tensile strength (UTS) and ultimate shear strength (USS) of the clad plate by about 20%. Among the schemes, EH40/Co/Fe/Ni/2205 had been the preferred option, with a UTS of 549MPa and a USS of 704MPa. © 2024, The Authors. All rights reserved.

关键词： Microstructure

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Cyclic Hardening/Softening of a TRIP Duplex Stainless Steel 13th

Cyclic Hardening/Softening of a TRIP Duplex Stainless Steel

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13th International Conference on the technology of Plasticity, ICTP 2021

作者： Jin, Miao Chen, Lei Zou, Zongyuan Hao, Shuo Li, Qun Zhao, Shiyan Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University Qinhuangdao066004 China

ISBN: (纸本)9783030753801

Recently, a series of duplex stainless steels (DSSs) have been developed by replacing Ni–Mo with Mn–N, which makes DSS more economical and produces TRIP effect with higher strength and plasticity. In this work, the mechanical properties of a TRIP-assisted DSS under monotonic and cyclic loading conditions were studied and the micro-structure under cyclic loading was analyzed by transmission electron microscopy (TEM). The test steel exhibits enhanced mechanical properties and a typical "three-stages" hardening characteristic due to TRIP effect under monotonic loading conditions. Cyclic hardening/softening characteristics of the test steel are affected by strain amplitude and the number of cycles. With smaller strain amplitude, cyclic hardening occurs first, and then shifts to cyclic softening and gradually trends to stabilization. With larger strain amplitude, after initial rapidly cyclic hardening, the test steel still changes to cyclic softening, however, no stabilization occurs until failure. The dislocation walls in ferrite during cyclic deformation are responsible for the overall cyclic softening of the test steel;While austenite produces Ε martensite transformation at larger strain amplitude, which suppresses the cyclic softening, so that with an increase in strain amplitude the cyclic softening rate increases rapidly, followed by a slow increase and a final decrease. © 2021, The Minerals, Metals & Materials Society.

关键词： High resolution transmission electron microscopy

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Three-roller continuous setting round process for longitudinally submerged arc welding pipes

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Transactions of Nonferrous Metals Society of China 2021年第5期31卷 1411-1426页

作者： Xue-ying HUANG Jun ZHAO Gao-chao YU Qing-dang MENG Zhen-kai MU Rui-xue ZHAI Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of Education of ChinaYanshan UniversityQinhuangdao 066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

In order to solve the problems of excess ovality and cross-section distortion of longitudinally submerged arc welding pipes after forming,a new three-roller continuous setting round process was *** process can be divided into three stages:loading stage,roll bending stage and unloading *** on the discretization idea,the mechanical model of the primary statically indeterminate problem of the longitudinally submerged arc welding pipes at the roll bending stage was established,and the deformation response was *** simulation and theoretical results show that there are three positive bending regions and three reverse bending regions along the circumference of the *** loading force of each roller shows growth,stability and downward trend with *** error between the theoretical fitting curve and the simulated data point is very small,and the simulation results verify the reliability of the theoretical *** experimental results show that the residual ovality decreases with the increase of the reduction,and the reduction of the turning point is the optimum *** addition,the residual ovality of the pipe is less than 0.7%without cross-section distortion,which verifies the feasibility of this process.

关键词： longitudinally submerged arc welding pipes three-roller continuous setting round statically indeterminate problem mechanical model ovality optimum reduction

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Mechanism Design and Walking Stability Study of (2UPS-U) +R Series-Parallel Hybrid Bionic Wheel-Legged Quadruped Robot*

Mechanism Design and Walking Stability Study of (2UPS-U) +R ...

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IEEE International Conference on Robotics and Biomimetics

作者： Shanshan Li Hongbo Wang Dong Li Minghao Li Lianqing Li Yu Tian Jianye Niu Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Yanshan University Qinhuangdao China Academy for Engineering & Technology Fudan University Shanghai China Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System and Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education of China Yanshan University Qinhuangdao China

In this paper, a bionic-based design of a series-parallel hybrid wheel-legged quadruped robot that can realize wheel-foot transformations is presented to achieve footed stable walking, and a method of measuring the static stability of the robot by the evaluation of the torque of the supporting leg rotor axis is proposed with the consideration of the robot's leg mass. Firstly, the whole robot position is solved; Secondly, the force on the robot during static walking is analyzed, and the stability of its static walking is also analyzed from the moment perspective; Finally, the stabilizing support region for static walking is solved, and the stabilizing support region for the robot in such a motion state is calculated. This paper provides high reference significance and value for the mechanism design and walking stability research of series-parallel hybrid wheel-legged quadruped robots.

关键词：

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Effect of temperature on the dispersion of graphene in graphene reinforced aluminum matrix composite 4

Effect of temperature on the dispersion of graphene in graph...

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2020 4th International Conference on Material science and technology, ICMST 2020

作者： Wang, Qiang Sun, Qingze Chen, Shengyong Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China

The influence of hot pressing temperature on the dispersion of graphene (GR) in GR reinforced aluminum matrix composites was investigate. The micro structure s of the sample were observed by optical microscope, scanning electron microscopy and energy dispersion spectrum, respectively. The temperature is hold at 640-750°C, and the interval is 10°C. The results show that GR is mainly distributed at the grain boundary at 640°C. And GR is dispersed in the aluminum matrix, without obvious agglomeration at the temperature from 670°C to 680°C. However, GR is agglomerated in the aluminum matrix and has obvious regional differentiation at 690-750°C, in which the concentrated area of GR is in the middle of the sample, and the dilution area in the rest. © 2020 Institute of Physics Publishing. All rights reserved.

关键词： Graphene

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Densification,microstructural features and tensile properties of selective laser melted AlMgSiScZr alloy from single track to block specimen

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Journal of Central South University 2021年第4期28卷 1129-1143页

作者： BI Jiang CHEN Yan-bin CHEN Xi STAROSTENKOV M D DONG Guo-jiang Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of Education Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China General Physics Department Polzunov Altai State Technical UniversityBarnaul 656038Russia

The selective laser melting(SLM)processed aluminum alloys have already aroused researchers’attention in aerospace,rail transport and petrochemical engineering due to the comprehensive advantages of low density,good corrosion resistance and high mechanical *** this paper,an Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy was fabricated via *** characteristics of single track at different process parameters,and the influence of hatch spacing on densification,microstructural features and tensile properties of block specimens were systematically *** hatch spacing has an influence on the overlap ratio of single track,and further affects the internal forming quality of printed *** a laser power of 160 W and scanning speed of 400 mm/s,the densification of block specimen increased first and then decreased with the increase of hatch *** nearly full dense specimen(98.7%)with a tensile strength of 452 MPa was fabricated at a hatch spacing of 80μ*** characteristics of dimple and cleavage on the tensile fracture of the AlMgSiScZr alloy showed the mixed fracture of ductility and brittleness.

关键词： selective laser melting aluminum alloy hatch spacing microstructural feature tensile properties

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