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Precision forging technology for aluminum alloy

Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 25-36 doi: 10.1007/s11465-018-0477-y

Abstract: However, during forging processes, underfilling, folding, broken streamline, crack, coarse grain, andSeveral advanced precision forging technologies have been developed, including closed die forging, isothermaldie forging, local loading forging, metal flow forging with relief cavity, auxiliary force or vibrationloading, casting-forging hybrid forming, and stamping-forging hybrid forming.or combining precision forging technologies with other forming technologies.

Keywords： precision forging     aluminum alloy     closed die forging     flow control forging     hybrid-forming technology    

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The Near β Forging Overthrows the Conventional Forging Theory and Develops a New Tri-modal Microstructure

Zhou Yigang,Zeng Weidong,Yu Hanqing

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 61-66

Abstract:

The near beta forging for titanium alloys proposed by the authors has overthrown the conventionalforging theory in the following two aspects: firstly, the material is heated and forged at 10〜15℃ belowbeta transus temperature and then water cooled; secondly, the heat treatment technology after forgingtransformation, defomation and strengthening and toughening theory, materials forged by the near beta forgingThe near beta forging is applicable not only to alpha-beta alloy, but also to alpha, near alpha and near

Keywords： titanium alloy     near beta forging     tri-modal microstructure    

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Interfacial heat transfer coefficient between metal and die during high pressure die casting process

GUO Zhipeng, XIONG Shoumei, CHO SangHyun, CHOI JeongKil

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 283-287 doi: 10.1007/s11465-007-0049-z

Abstract: focused on the determination of the interfacial heat transfer coefficient (IHTC) between metal and dieduring the high pressure die casting (HPDC) process.Casting thickness played an important role in affecting the IHTC between the metal and die not only intendencies of the metal solid fraction were found between castings with different thicknesses and the die

Keywords： so-called     calculation     inverse     interfacial     aluminum    

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An energy consumption prediction approach of die casting machines driven by product parameters

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 868-886 doi: 10.1007/s11465-021-0656-0

Abstract: Die casting machines, which are the core equipment of the machinery manufacturing industry, consume greatThe energy consumption prediction of die casting machines can support energy consumption quota, processNevertheless, due to the uncertainty and complexity of the energy consumption in die casting machinesConsequently, a systematic energy consumption prediction approach for die casting machines, involvingproduct, die, equipment, and process parameters, is proposed.

Keywords： die casting machine     energy consumption prediction     product parameters    

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Ultrasonic measurement of tie-bar stress for die-casting machine

Frontiers of Mechanical Engineering doi: 10.1007/s11465-021-0663-1

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Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 134-141 doi: 10.1007/s11708-015-0354-x

Abstract: A series of experiments were conducted on a closed loop PHP with 5 turns made of copper capillary tube

Keywords： closed loop pulsating heat pipe     thermal performance     operation limit     thermography    

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Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

LU Xiao-chun, GUO Sheng, RUAN Feng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 80-84 doi: 10.1007/s11465-005-0021-8

Abstract:

A comprehensive evaluation system of die quality, a multiplayer hierarchical amendment index systemaccording to the characteristics of cold stamping die production, an evaluation standard referring toThe applications show that the system can be used to evaluate the die quality objectively, fairly, and

Keywords： scientific evaluation     stamping     multiplayer hierarchical     technique     evaluation standard    

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Improvement of the cascading closed loop cycle system

ZHANG Guoqiang, CAI Ruixian

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 341-346 doi: 10.1007/s11708-007-0051-5

Abstract: Aspen Plus was used to simulate and get more information about the cascading closed loop cycle (CCLC)
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Dynamic simulation of a space gas-cooled reactor power system with a closed Brayton cycle

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 916-929 doi: 10.1007/s11708-021-0757-9

Abstract: Space nuclear reactor power (SNRP) using a gas-cooled reactor (GCR) and a closed Brayton cycle (CBC)

Keywords： gas-cooled space nuclear reactor power     closed Brayton cycle     system startup and shutdown     positive reactivity    

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General closed-form inverse kinematics for arbitrary three-joint subproblems based on the product of

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0681-7

Abstract: The novel algebraic geometric (NAG) methods that obtain the general closed-form inverse kinematics forindicating that the inverse solutions are consistent with the given joint angles validate the general closed-formAdditionally, the mean and maximum of the master–slave tracking experiment for the closed-form solutionThe experiments results demonstrate that the closed-form solution is superior to the compensation methodThe results verify the proposed general closed-form inverse kinematics based on the NAG methods.

Keywords： inverse kinematics     Paden–Kahan subproblems     three-joint subproblems     product of exponential     closed-form    

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Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 1,   Pages 48-52 doi: 10.1007/s11465-018-0493-y

Abstract: The first, second, and third parts were produced by low-pressure die casting (Al-12Si-0.8Cu-0.5Fe-0.9Mg-0.7Ni-0.2Zn alloy), die casting (A356, Al-7Si-0.3Mg), and semi-solid casting (A356, Al-7Si-0.3Mg), respectivelyUnlike die casting (second part), low-pressure die casting (first part) significantly reduced the formation

Keywords： near-net shape casting     aluminum parts     casting defects     low pressure die casting     die casting     semi-solid    

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Effect of Joule heating on electro-osmotic flow in a closed-end micro-channel with isothermal and convective

Liang ZHAO, Linhua LIU,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 381-388 doi: 10.1007/s11708-009-0057-2

Abstract: The effect of Joule heating on the steady state electro-osmotic flow in a closed-end micro-channel ison the induced pressure gradient is also studied, which is very important for the application of the closed-end

Keywords： closed-end micro-channel     electrical double layer     electro-osmotic flow     induced pressure gradient     Joule    

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Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1222-1237 doi: 10.1007/s11709-021-0773-1

Abstract: The influence of closed and open surface flaws on the stress distribution and failure in rock specimensThe simulated specimens include those with closed flaws and those with open flaws on the surface.Numerical results show significant differences in the stress, displacement, and failure behavior of the closed

Keywords： surface flaw     heterogeneity     circular hole     numerical modeling     relative displacement    

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Multiobjective image recognition algorithm in the fully automatic die bonder

JIANG Kai, CHEN Hai-xia, YUAN Sen-miao

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 313-316 doi: 10.1007/s11465-006-0026-y

Abstract: It is a very important task to automatically fix the number of die in the image recognition system ofa fully automatic die bonder.

Keywords： clustering     different     recognition algorithm     Algorithm     multiobjective    

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PWR-FBR with closed fuel cycle for a sustainable nuclear energy supply in China

XU Mi

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 129-134 doi: 10.1007/s11708-007-0016-8

Abstract: From the thermal reactor to the fast reactor and then to the fusion reactor; this is the three-step strategy that has been decided for a sustainable nuclear energy supply in China. As the main thermal reactor type, the commercialized development phase of the pressurized water reactor (PWR) has been stepped up. The development of the fast reactor (FBR) is still in the early stage, marked by China experimental fast reactor (CEFR), which is currently under construction. According to the strategy study on the fast reactor development in China, its engineering development will be divided into three steps: the CEFR with a power of 65 MWt/20 MWe; the China prototype fast reactor (CPFR) with a power of 1 500 MWt/600 MWe; and the China demonstration fast reactor (CDFR) with a power of 2 500 3 750 MWt/1 000 1 500 MWe. With regards to the fuel cycle, a 100 t/a PWR spent fuel reprocessing pilot plant and a 500 kg/ a MOX fabrication plant are under construction. A project involving the construction of an industrial reprocessing plant and an MOX fabrication plant are also under application phase.

Keywords： reactor development     reprocessing     MWt/600     demonstration     three-step strategy    

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Title Author Date Type Operation

Precision forging technology for aluminum alloy

Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA

Journal Article

The Near β Forging Overthrows the Conventional Forging Theory and Develops a New Tri-modal Microstructure

Zhou Yigang,Zeng Weidong,Yu Hanqing

Journal Article

Interfacial heat transfer coefficient between metal and die during high pressure die casting process

GUO Zhipeng, XIONG Shoumei, CHO SangHyun, CHOI JeongKil

Journal Article

An energy consumption prediction approach of die casting machines driven by product parameters

Journal Article

Ultrasonic measurement of tie-bar stress for die-casting machine

Journal Article

Experimental investigations on operating characteristics of a closed loop pulsating heat pipe

Yu WANG

Journal Article

Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

LU Xiao-chun, GUO Sheng, RUAN Feng

Journal Article

Improvement of the cascading closed loop cycle system

ZHANG Guoqiang, CAI Ruixian

Journal Article

Dynamic simulation of a space gas-cooled reactor power system with a closed Brayton cycle

Journal Article

General closed-form inverse kinematics for arbitrary three-joint subproblems based on the product of

Journal Article

Determining casting defects in near-net shape casting aluminum parts by computed tomography

Jiehua LI, Bernd OBERDORFER, Daniel HABE, Peter SCHUMACHER

Journal Article

Effect of Joule heating on electro-osmotic flow in a closed-end micro-channel with isothermal and convective

Liang ZHAO, Linhua LIU,

Journal Article

Analysis of stress and failure in rock specimens with closed and open flaws on the surface

Journal Article

Multiobjective image recognition algorithm in the fully automatic die bonder

JIANG Kai, CHEN Hai-xia, YUAN Sen-miao

Journal Article

PWR-FBR with closed fuel cycle for a sustainable nuclear energy supply in China

XU Mi

Journal Article