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4th IEEE advanced Information Management, Communicates, Electronic and Automation Control Conference, IMCEC 2021

作者： Wang, Mingzhao Rong, Wenjuan Wang, Jialin Wang, Yongwei Sa, Yingying Ma, Yinuo State Key Laboratory of Advanced Forming Technology Equipment Beijing China Beijing National Innovation Institute of Lightweight Ltd. Beijing100083 China

ISBN: (纸本)9781728185347

The three-dimensional features of the single track forming result are one of the key factors for metal 3D printing, while few studies are carried out to predict the three-dimensional features in liquid metal jetting printing area. In this paper, the results of the single track forming are scanned by 3D displacement sensor to obtain accurate 3D model. Based on the 3D model, the average width and average height are logically selected to demonstrate the three-dimensional features. To predict the type and size of the single track forming result, 2 neural networks are designed, which both contain 2 hidden layers. After training and testing, the Classification model of the two Multi-Input-Multi-Output neural networks has more than 90% accuracy in the classification prediction of the single channel forming results, and the average prediction errors of the average width and average thickness in the size prediction model are limited to 6%. © 2021 IEEE.

关键词： Liquid metals

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Super-Wetting Interface Engineering of Space-Confined Micron-Sized Alloying Anodes for High-Performance Sodium-Based Dual-Ion Batteries

SSRN

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SSRN 2025年

作者： Liu, Bei Yan, Kunye Shang, Jian Fan, Yixuan Shi, Lei Pan, Qingguang Jiang, Chunlei Tang, Yongbing Advanced Energy Storage Technology Research Center Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China University of Chinese Academy of Sciences Beijing100049 China Guangdong Key Laboratory for Processing and Forming of Advanced Metallic Materials School of Mechanical & Automotive Engineering South China University of Technology 381 Wushan Guangzhou510640 China

Poor electrolyte wettability has been identified as a critical issue, leading to uneven interfacial reactions and stress distribution that ultimately cause structural failure in micron-sized alloying anodes. To tackle this, a super-wetting interface engineering strategy has been proposed. This strategy aims to create an electrolyte-philic interface to boost reaction homogeneity and speed up reaction kinetics during alloying, potentially enhancing the performance and reliability of micron-sized alloying anodes in high-performance sodium-ion storage devices, which is crucial for advancing energy storage technologies. This investigation allows for the extensive application of this strategy for micron-sized alloying anodes, contributing to the advanced, efficient high-performance sodium-ion storage devices for energy storage needs like electric vehicles and grid storage. © 2025, The Authors. All rights reserved.

关键词： Sodium-ion batteries

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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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The Design of An Intelligent Self-Reconfigurable Single-Module Robot

The Design of An Intelligent Self-Reconfigurable Single-Modu...

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Electronic technology and Information Science (ICETIS), International Conference on

作者： Zezheng Xing Qiuwei Zheng Lang Xiong Yundou Xu Laboratory of Parallel Robot and Mechatronic System of Hebei Province Yanshan University Qinhuangdao China School of Mechanical Engineering Yanshan University Qinhuangdao China Key Laboratory of Advanced Forging & Stamping Technology Science (Yanshan University) Ministry of Education of China Qinhuangdao China

ISBN: (数字)9798350388343

ISBN: (纸本)9798350388350

Self-reconfigurable robot is a typical modular robot, which is composed of a large number of identical modules based on cell design idea. Perform a job by combining it as a whole while working. At present, the carrying capacity of the self-reconfigurable robot is limited and the degree of intelligence is not high, which leads to the limited working ability of the self-reconfigurable robot. Therefore, an intelligent single-module self-reconfigurable robot is designed in this paper. Firstly, a high stiffness bidirectional butt locking mechanism is designed for the connection between modules. Secondly, aiming at the task of quick survey of fire rescue environment, the identification and distance detection of ignition point and rescue personnel are designed in the fire environment. The BI _ A * algorithm is used to complete the single-module path planning of the self-reconfigurable robot, and the Multi_ Bi _ A * algorithm is proposed for the optimal path planning of the collection of multi-module self-reconfigurable robots. Finally, the functional verification of the prototype is completed by using a single three-room model experiment platform.

关键词： Surveys Target recognition Prototypes Programming Multitasking Stability analysis Path planning

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Enhancing Thermal Stability of Laser-Powder Bed Fusion Fabricated High Entropy Alloy by Introducing Elemental Segregation Using in-situ Alloying

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SSRN 2024年

作者： Zhu, Xiangjian Niu, Mengchao Liu, Shan Yu, Yanan Han, Luyi Zhao, Guoqun Wang, Guangchun State Key Laboratory of Advanced Equipment and Technology for Metal Forming Shandong University Shandong Jinan250061 China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Shandong Jinan250061 China Department of Mechanical Engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Hong Kong The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen518057 China Hebei Key Laboratory of Material Near-net Forming Technology Hebei University of Science and Technology Hebei Shijiazhuang050000 China

A method is proposed to enhance the thermal stability of laser-powder bed fusion fabricated (L-PBFed) alloys by incorporating Al element segregation through in-situ alloying. The high entropy alloy (HEA) with Al segregation was prepared through in-situ alloying of mixed powders of AlSi10Mg and FeCoCrNi, and the enhanced thermal stability of the grain boundary (GB) and dislocation in high-temperature annealing at 1000 °C and 1200 °C is verified and studied. Experimental characterization and molecular dynamics (MD) simulations revealed that the introduced Al segregation exists in two forms of B2/BCC phases, one in banded shape in the FCC matrix and the other as particles at GBs. At elevated temperatures, short-range uphill diffusion occurs within the banded B2/BCC phase, resulting in the formation of dispersed or mesh-like B2/BCC phases of higher Al and Ni content, along with the generation of dislocations. Additionally, long-range diffusion of Al atoms, originating from the aggregated region of banded B2/BCC, travels to the matrix, utilizing GBs as rapid channels. This diffusion stabilizes GBs by reducing their cohesive energy and maintaining the nailing effect of the B2/BCC phase at GBs. Consequently, the mechanical property exhibits remarkable resistance to softening compared to the traditional L-PBFed alloys. This study demonstrates that element segregation introduced by in-situ alloying serves as an effective approach to enhance the thermal stability of L-PBFed alloys. Furthermore, the proposed theory of sustained phase transitions offers insights into understanding the transitions of heterogeneous alloys fabricated through in-situ alloying at elevated temperatures. © 2024, The Authors. All rights reserved.

关键词： Molecular dynamics

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Bending damage of 3D printing T-beam 8

Bending damage of 3D printing T-beam

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2022 8th International Forum on Manufacturing technology and Engineering Materials, IFEMMT 2022

作者： Wu, Siyuan Shan, Zhongde Chen, Ken Zhou, Dongming Liang, Wei Wu, Xiaochuan State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science & Technology Group Co. Ltd. Beijing100044 China Department of Mechanical Engineering Tsinghua University Beijing100084 China College of Mechanical & Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China Beijing National Innovation Institute of Lightweight Ltd. China

3D printing of continuous fiber reinforced resins offers a new approach of designing and manufacturing composite materials. The study applied 3D printing method to fabricate T-beam structures, and investigated the damage process and damage morphology of T-beams under three-point bending loads. Meanwhile acoustic emission was taken advantage of to study the damage process, and principal component analysis and k-means clustering algorithm was used to analyze the signals and classify the damage. The results indicate that the fabrication of continuous fiber-reinforced T-beams can be achieved by 3D printing, and the presence of rib height can significantly improve the bending load capacity by approximately 400% and reduce the maximum deflection by 51%. The analysis of the acoustic emission data indicates that the T-beam bending damage modes includes matrix cracking, interlayer delamination, fiber and resin debonding, fiber cracking and fiber fracture, and the classification results can well explain the bending damage process of the T-beam. © Published under licence by IOP Publishing Ltd.

关键词： Resins

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Pulsed current-assisted twelve-roll precision rolling deformation of SUS304 ultra-thin strips with exceptional mechanical properties

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International Journal of Extreme Manufacturing 2024年第4期6卷 291-305页

作者： Wanwan Fan Tao Wang Jinxiong Hou Zhongkai Ren Qingxue Huang Guanghui Wu College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyYingze West Street 79Taiyuan 030024Shanxi ProvincePeople's Republic of China Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education Taiyuan University of TechnologyYingze West Street 79Taiyuan 030024Shanxi ProvincePeople's Republic of China National Key Laboratory of Metal Forming Technology and Heavy Equipment Taiyuan University of TechnologyYingze West Street 79Taiyuan 030024Shanxi ProvincePeople's Republic of China College of Aeronautics and Astronautics Taiyuan University of TechnologyYingze West Street 79Taiyuan 030024Shanxi ProvincePeople's Republic of China

Innovative pulsed current-assisted multi-pass rolling tests were conducted on a 12-roll mill during the rolling deformation processing of SUS304 ultra-thin *** results show that in the first rolling pass,the rolling reduction rate of a conventionally rolled sample(at room temperature)is 33.8%,which can be increased to 41.5%by pulsed current-assisted rolling,enabling the formation of an ultra-thin strip with a size of 67.3μm in only one rolling *** three passes of pulsed current-assisted rolling,the thickness of the ultra-thin strip can be further reduced to 51.7μ*** clearly compare the effects of a pulsed current on the microstructure and mechanical response of the ultra-thin strip,ultra-thin strips with nearly the same thickness reduction were *** was found that pulsed current can reduce the degree of work-hardening of the rolled samples by promoting dislocation detachment,reducing the density of stacking faults,inhibiting martensitic phase transformation,and shortening the total length of grain *** a result,the ductility of ultra-thin strips can be effectively restored to approximately 16.3%while maintaining a high tensile strength of 1118 ***,pulsed current-assisted rolling deformation shows great potential for the formation of ultra-thin strips with a combination of high strength and ductility.

关键词： pulsedcurrent-assisted SUS304 ultra-thinstrip rolling reductionrate work-hardening mechanical properties

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Software and Application of Big Data Analysis Platform for Complex Casting Manufacturing Process Quality 75

Software and Application of Big Data Analysis Platform for C...

引用

75th World Foundry Congress, WFC 2024

作者： Zhou, Jianxin Zhou, Wenhao Yu, Peng Li, Wen Ji, Xiaoyuan Yin, Yajun Shen, Xu Zhang, Meijuan Qie, Xiwang Nan, Hai Zhu, Shouqin Xie, Mingguo Wang, Yu Li, Hulin Liu, Xiao Zhang, Baoming Yao, Gang Wang, Chuansheng Wang, Donghong Hu, Jianping Qian, Xuewen State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science & Technology Wuhan430074 China Baimtec Material Co. Ltd. Beijing100094 China Hefei Casting and Forging Factory of Anhui Heli Co. Ltd. Hefei230000 China Xi’an Aerospace Engine Co. Ltd. Xian710000 China CRCC High-Tech Equipment Co . Ltd. Kunming650215 China Guizhou Aircraft Engine Precision Casting Co. Ltd. Guiyang550014 China Wuxi Branch of FAW Casting Co. Ltd. Wuxi214177 China Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming Shanghai Jiao Tong University Shanghai200240 China Wuhan Yimo Technology Co. Ltd. Wuhan430074 China Wuhan Huazhu Information Technology Co. Ltd. Wuhan430074 China

The complex castings used in major equipment in industries such as aerospace, automotive, rail transportation, and engineering machinery are prone to defects such as porosity, deformations, and inclusions due to the coupling effects and fluctuations of key process parameters. This leads to common problems such as "key quality points exceeding standards" and large quality fluctuations, seriously affecting the reliability and stability of major equipment manufacturing products. In this paper, a systematic study on the model-method-technology of typical defect quality big data was conducted. Firstly, relevant models were constructed, such as the single piece quality tracing model, the multi-source heterogeneous information fusion model, the model of production parameters and intrinsic relationship of typical defects, and the model of comprehensive element time-varying disturbance and defect evolution mapping. Then, five key technologies were developed, including high-precision and efficient online monitoring and prediction of typical defects, tracing the causes of quality problems in multiple links, and quality control based on the relationship between production fluctuations and metallurgical defect evolution. Based on the above research, data collection, cleaning, mining, sensitivity analysis, and relationship modeling algorithms were established for the casting production process. Special core algorithms for predicting defects such as shrinkage, looseness, and gas entrapment were proposed, achieving high-precision prediction of typical defects. A "1+N" quality big data analysis software and hardware integrated platform was developed. After applying the integrated platform to the five major industries of aerospace, automotive, rail transportation, engineering machinery, and aerospace industries, the results showed an accuracy of quality prediction of ≥80% and a reduction in defects of ≥ 30%, leading to the formulation of solutions and key demonstrations in these indu

关键词： Aerospace industry

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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 ...

引用

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.

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Microstructure and Properties of Copper/Graphene Composites Prepared Via Powder Hot Extrusion

SSRN

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SSRN 2024年

作者： Chen, Kaili Dong, Jialiang Qiu, Cheng Luo, Zongqiang Zhang, Datong Guangdong Key Laboratory for Advanced Metallic Materials Processing and Forming National Engineering Research Center of Near-net-shape Forming for Metallic Materials South China University of Technology Guangzhou510640 China College of Material Science and Engineering Guizhou Minzu University Guizhou550025 China

Cu/Gr composites have been reported to have high mechanical properties and electrical conductivity, but some of the preparation methods are difficult to execute for industrial production. In this study, Cu/Gr composites were successfully prepared by direct hot extrusion without sintering, and then microstructure, mechanical properties, and electrical conductivity were investigated. Graphene and copper powder were mixed using ultrasonic vibration combined with a V-type mixer. The addition of graphene enhances the mechanical properties of the material, making it have a high electrical conductivity of 94%IACS, and the yield strength and tensile strength are 208 MPa and 233 MPa, respectively. © 2024, The Authors. All rights reserved.

关键词： Graphene

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