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作者： Xu, Yundou Xu, Zhenghe Yang, Fan Mei, Youen Yue, Yi Zhou, Yulin Yao, Jiantao Zhao, Yongsheng Laboratory of Parallel Robot and Mechatronic System of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Qinhuangdao066004 China Shanghai Aerospace Equipment Manufacture Company Limited Shanghai201100 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China

In this paper, a 2R1T (two rotations and one translation) over-constrained parallel mechanism R(2RPR)R/SP with two ordered continuous rotational axes is proposed, which contains fewer joints, by concatenating a 2-degree-of-freedom (DOF) RR tilting head with orientation-adjusting capability, a novel 5-DOF hybrid manipulator is constructed. On this basis, optimize the sizes with the best performance of the motion/force transmissibility as the optimization target, and the design dimensions that meet the requirements of the workspace are obtained and the structural design is carried out. The static stiffness of the manipulator are analyzed, and the analysis results are verified by simulation and compared with the products that have been successfully applied in foreign countries. An iterative searching method is used to determine the workspace of the manipulator, and evaluate whether the workspace of the hybrid manipulator meets the requirements. © 2020, Springer Nature Singapore Pte Ltd.

关键词： Manipulators

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The Simulation Study On Cutting Patterns For Cutting Head Of Longitudinal Axial Roadheader

The Simulation Study On Cutting Patterns For Cutting Head Of...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Yuan Xiaoming Shen Minghui Zhang Lijie Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University

The simulation of drilling condition and swing condition is completed with *** cutting patterns of cutting process is drawn for cutting head of longitudinal axial *** variations of c

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Development and application of light-weight design of the aluminum alloy wheel

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2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012

作者： Hu, Jinhua Liu, Xinxin Sun, Huixue Zhu, Zhihua Li, Baohua Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Ministry of Education of China Qinhuangdao 066004 China Qinhuangdao Yanda Modern Integrated Manufacturing Technology Development Co. Ltd Qinhuangdao 066004 China Research and Design Department Citic Dicastal Co. Ltd Qinhuangdao 066004 China

ISBN: (纸本)9783037856697

In order to implement the optimization design for a forging aluminum wheel, the wheel's structural optimization design software, i.e. DWheel, was developed in this paper. DWheel was programmed based on C# and ANSYS applying the restrained variable-dimension method. The key data interface commands were introduced first. Subsequently, the software was applied on a forging wheel's structural optimization design. The optimized wheel passed the practical testings successfully. © (2013) Trans Tech Publications, Switzerland.

关键词： Structural optimization

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Effect of Rolling Reduction Rate on the Microstructure of Hot Rolling Stainless Steel Clad Plate 5

Effect of Rolling Reduction Rate on the Microstructure of Ho...

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2018 5th International Conference on advanced Composite Materials and Manufacturing Engineering, ACMME 2018

作者： Jin, Herong Zhang, Lei Yi, Yali Key Lab. of Advanced Forging and Stamping Technology and Science of Ministry of National Education Yanshan University Qinhuangdao066004 China Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China School of Mechanical Engineering Yanshan University Qinhuangdao066004 China

The macro-scale and meso-scale simulation models of stainless steel clad plate were established by DEFORM-3D. The multi-scale coupling simulations of clad plate with different rolling parameters were carried out. The seven pass hot rolling process of stainless steel clad plate was simulated by numerical simulation. By contrasting the vertical stress and the deformation resistance of cladding layer, the rolling reduction rate satisfying interface bonding was obtained. The grain distribution at the center of the substrate layer was analyzed and reasonable hot rolling reduction rates were selected considering their effects on the recrystallization volume percent and the grain size. The results show that the grain size decreases with the increase of reduction rate. However, too much reduction rate will decrease the rate of recrystallization volume percent and the refining effect of grain is not obvious. To ensure uniform grain size distribution, it is most reasonable to set the rolling temperature to 1150°C and the reduction rate to 50%. © Published under licence by IOP Publishing Ltd.

关键词： Stainless steel

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Effects of Cutting Angle on Load Characteristics of Picks on Roadheader

Effects of Cutting Angle on Load Characteristics of Picks on...

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第六届工程机械与车辆工程新进展国际学术会议

作者： Yuan Xiaoming Zhao Shiyi Sun Kunxing Zhang Lijie Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University

The horizontal yaw cutting condition of the picks was analyzed to study the load characteristics of a roadheader’s cutting *** on theoretical calculation,the range of the cutting angle was cert

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The Research on The Seawater Desalination System of Electro Hydraulic Proportional Valve Controlled Hydraulic Cylinder

The Research on The Seawater Desalination System of Electro ...

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第六届工程机械与车辆工程新进展国际学术会议

作者： ZHANG Qisheng LI Wenlei LIU Feng ZHAO Jingyi Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University)

The shortage of water resources is a major challenge of the world,seawater desalination is the best way to solve the crisis of water *** osmosis membrane desalination equipment needs to

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Near-α Ti60 alloy dwell fatigue basal slip-induced cracking: faceted crack initiation and local strain evolution

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Journal of Materials science & technology 2025年

作者： Boning Wang Weidong Zeng Zibo Zhao Runchen Jia Jianwei Xu Qingjiang Wang Heng Li State Key Laboratory of Solidification Processing School of Materials Science and Engineering Northwestern Polytechnical University Xi’an 710072 China Defense Technologies Innovation Center of precision forging and ring rolling School of Materials Science and Engineering Northwestern Polytechnical University Xi’an 710072 China Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment Northwestern Polytechnical University Xi’an 710072 China Shi Changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Basal fracture due to dwell fatigue (DF) is primary cause of core material failure during aero-engine service, which highlights the importance of understanding the crack initiation mechanism. In this study, the relationship between activation of plastic slip within the [0001] basal plane orientation, local strain and crack initiation in near-α Ti60 alloys was investigated using coupled in situ and high-resolution digital image correlation (HR-DIC) methods. The results show that basal slip is preferentially activated resulting into a higher shear strain in DF compared to [10 1 ¯ 0] prismatic orientation grains. Two types of cracking induced by strong basal slip were identified in grains with medium to high basal Schmidt factor (SF): slip transgranular cracking and basal twist grain boundary (BTGB) cracking. The slip deformation and strain evolution of the two types of cracks before and after their initiation were observed for the first time on the sample surface by in-situ dwell, which provides experimental and theoretical support for their formation mechanism. In order to constitute potential locations for crack nucleation, these regions have high local and shear strains during the basal slip stage prior to crack initiation. The higher local strain in the former is attributed to the intrusion and extrusion mechanism of the slip bands, while the latter is attributed to the inconsistency of the slip deformation of the microscopic dislocations on both sides of the BTGB making the GB slip-shear. Additionally, the incoordination on both sides of the GB, coupled with the inherently low cleavage energy, makes the BTGB more susceptible to cracking compared to slip transgranular cracking. No elemental segregation or β-phase influence was observed at the grain boundary interface. This study provides new insights into the mechanisms involved basal slip-induced cracking in Ti alloys subjected to dwell loadings.

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Differential evolution based quantum genetic algorithm and its application

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Journal of Computational Information Systems 2014年第1期10卷 1-8页

作者： Jiang, Wanlu Zhang, Sheng Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Edu. of China Yanshan University Qinhuangdao 066004 China

In the traditional quantum genetic algorithm, the rotation angle and direction of the quantum rotation gate should be looked up from the lookup table which has been designed according to the specific problem. However, this way to solve optimization problems has strong pertinence and poor efficiency so as to miss the global optimal value. For overcome this drawback, the rotation angle and the direction of the quantum rotation gate is determined with the differential evolution algorithm instead, which is a high-efficiency and adaptable evolutionary algorithm. The improved algorithm is applied to solve the function optimization problem, and the numerical results indicate that the improved algorithm has more efficiency and the stronger global optimal capacity. The improved algorithm can be used to optimize the rolling schedule of the tandem cold rolling mills, and the experiment demonstrates that the quantum genetic algorithm based on the differential evolution algorithm is an effective and feasible intelligence method for rolling schedule optimization. Copyright © 2014 Binary Information Press.

关键词： Table lookup

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Health status assessment of axial piston pump under variable speed

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High technology Letters 2020年第3期26卷 315-322页

作者： Guo Rui Li Hucheng Zhao Zhiqian Zhang Rongbing Zhao Jingyi Gao Dianrong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power'Transmission and Control Yanshan UniversityQinhuangdao 066004P.R.China State key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027P.R.China Key Labratory of Advanced Forging&Stamping Teclnology and Science Yanshan UniversityQinhuangdao O66004P.R.China Hebei Key Laboratory of Special Delivery Equipment Yanshan University Qinhuangdao 066004P.R.China

The axial piston pump usually works under variable speed *** is important to evaluate the health status of the axial piston pump under the variable speed *** at the characteristic signals obtained under different wear levels of the port plate,a feature signal extraction method under variable speed conditions is ***,the combination of complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)energy spectrum and fast spectral kurtosis principle is used to accurately extract the intrinsic mode function(IMF)component containing the sensitive information of the degraded ***,the aspect ratio analysis method of the angle domain variational mode decomposition(VMD)is used to process the feature index containing the sensitive information of the degraded *** order to evaluate the health status of the axial piston pump under variable speed,the vibration reliability analysis method for axial piston pump based on Weibull proportional failure rate model is *** experimental results show that the proposed method can accurately evaluate the health status of the axial piston pump.

关键词： axial piston pump variable speed condition order ratio variational mode decomposition(VMD)in angle domain health status assessment

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A Remotely Driven Finger Rehabilitation Robot for Passive and Active Rehabilitation 12

A Remotely Driven Finger Rehabilitation Robot for Passive an...

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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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