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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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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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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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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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An automated arc spray tooling system for rapid die-making of large-sized automobile body panels

HE Zhong-yun, LU Bing-heng, WANG Yi-qing, HONG Jun, TANG Yi-ping

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2,   Pages 209-214 doi: 10.1007/s11465-006-0012-4

Abstract: A creative robot wrist consisting of link mechanisms and a novel robot motion control method based on the cross-sectional vector contours of an STL-formatted model was proposed. By using the wrist and the control method, an industrial robot with five degrees of freedom for rapid tooling using metal arc spraying and electric brush plating techniques was developed. The wrist of the robot including a specially designed link mechanism can maintain the position of the spraying point on the surface of the master pattern whatever the orientation of the gun. Therefore, the kinematic nonlinear coupling between the position mechanism and orientation mechanism in a traditional robot can be avoided. The only input of the control system is the STL-formatted 3D CAD model of the pattern. Without the need of any manual programming, the metal arc spraying and brush plating (if necessary) processes can be performed automatically and efficiently after receiving the 3D CAD data of the pattern. Using this robot system in new car development and trial production, the cost and lead-time can be reduced substantially as compared with the conventional tool making method.

Keywords： industrial     position mechanism     orientation     surface     cross-sectional    

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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: Several 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 vibration

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

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Improving buckling critical stress of sheet with the elasti cpressure on the surfaces of sheet and it ’ s application

Song Aiping,Wang Longtai,Li Jizhong,Wang Shufeng

Strategic Study of CAE 2009, Volume 11, Issue 2,   Pages 53-59

Abstract: Based on the result, a novel stamping die was developed.The die can be reconfigured quickly and can suppress the wrinkling of sheet.

Keywords： wrinkling     critical stress     die     stamping process    

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Review of small aspheric glass lens molding technologies

Shaohui YIN,Hongpeng JIA,Guanhua ZHANG,Fengjun CHEN,Kejun ZHU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 66-76 doi: 10.1007/s11465-017-0417-2

Abstract: lens are greatly affected by various key technologies for glass lens molding, including glass and mold-diematerial forming, mold-die machining, and lens molding.

Keywords： aspheric glass lens     mold-die manufacturing     lens molding     molding process simulation    

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The Theoretic Evaluation and Verification for the Necking Force of the Cone-shaped Concave Die

Hu Chengwu,Luo Wenbo,Peng Yanrong

Strategic Study of CAE 2005, Volume 7, Issue 6,   Pages 54-56

Abstract:

Necking force is the main failure factor to the unstabitily of the thin-wall cylindrical parts. In order to improve the calculation precision of the necking force , Сторожев and Унксов separately put forward two different calculation methods about the necking force of the thin-wall cylindrical parts which take into consideation the thickness changing, the hardening effect and the friction function. In this paper, the results of the two calculation methods are analyzed by example,and are compared with experimented data. The results of two calculation methods are close to each other, and tally with experimented data.

Keywords： necking force     theoretic evaluation     verification    

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Mechanism of hot-deformation and magnetic domains of anisotropic die-upset rare earth permanent magnets

Li Wei,Zhu Minggang

Strategic Study of CAE 2011, Volume 13, Issue 10,   Pages 4-12

Abstract: It is found that the strain activation energy of the die-upset Nd-Fe-B magnets is about 380 kJ/mol basedimportant role in the coercivity mechanism and the corresponding maximum application temperature for the die-upset

Keywords： nanoscale Nd-Fe-B magnets     hot press-hot deformation     anisotropy     magnetic domains    

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Research of 1 770 MPa galvanized steel wire for stay cable of domestic bridges

Ding Feng,Sang Chunming,Zhou Daiyi,Bai Bingdong

Strategic Study of CAE 2009, Volume 11, Issue 3,   Pages 57-64

Abstract: The three key technologies based on the research are: "Double tension + limiter die" process

Keywords： galvanized steel wire     torsion     double tension     limiter die     gravel wiping    

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A Cyber-Physical Routing Protocol Exploiting Trajectory Dynamics for Mission-Oriented Flying Ad Hoc Networks Article

Die Hu, Shaoshi Yang, Min Gong, Zhiyong Feng, Xuejun Zhu

Engineering 2022, Volume 19, Issue 12,   Pages 217-227 doi: 10.1016/j.eng.2021.10.022

Abstract:

As a special type of mobile ad hoc network (MANET), the flying ad hoc network (FANET) has the potential to enable a variety of emerging applications in both civilian wireless communications (e.g., 5G and 6G) and the defense industry. The routing protocol plays a pivotal role in FANET. However, when designing the routing protocol for FANET, it is conventionally assumed that the aerial nodes move randomly. This is clearly inappropriate for a mission-oriented FANET (MO-FANET), in which the aerial nodes typically move toward a given destination from given departure point(s), possibly along a roughly deterministic flight path while maintaining a well-established formation, in order to carry out certain missions. In this paper, a novel cyber-physical routing protocol exploiting the particular mobility pattern of an MO-FANET is proposed based on cross-disciplinary integration, which makes full use of the mission-determined trajectory dynamics to construct the time sequence of rejoining and separating, as well as the adjacency matrix for each node, as prior information. Compared with the existing representative routing protocols used in FANETs, our protocol achieves a higher packet-delivery ratio (PDR) at the cost of even lower overhead and lower average end-to-end latency, while maintaining a reasonably moderate and stable network jitter, as demonstrated by extensive ns-3-based simulations assuming realistic configurations in an MO-FANET.

Keywords： Cyber-physical system     Flying ad hoc network (FANET)     Routing protocol     Trajectory dynamics     Unmanned aerial vehicle (UAV)    

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Genetic variants in the ADD1 and GNB3 genes and blood pressure response to potassium supplementation

Dai-Hai YU PhD, Jian-Feng HUANG MD, Ji-Chun CHEN MS, Jie CAO MS, Shu-Feng CHEN PhD, Dong-Feng GU MD, PhD, for the GenSalt Collaborative Research Group, De-Pei LIU PhD, Lai-Yuan WANG PhD, Jing CHEN MD, MSc, Jiang HE MD, PhD, Cashell E. JAQUISH PhD, Dabeeru C. RAO PhD, Charles GU PhD, James E. HIXSON PhD, Chung-Shiuan CHEN MS8, Paul K. WHELTON MD, MSc9,

Frontiers of Medicine 2010, Volume 4, Issue 1,   Pages 59-66 doi: 10.1007/s11684-010-0015-8

Abstract: Dietary potassium-supplementation has been associated with a decreased risk of hypertension and other cardiovascular outcomes. However, blood pressure (BP) responses to potassium supplementation vary among individuals. This study was designed to examine the association between 12 single nucleotide polymorphisms (SNPs) in the adducin 1 alpha (ADD1) and guanine nucleotide binding protein (G protein) beta polypeptide 3 (GNB3) genes and systolic BP (SBP), diastolic BP (DBP), and mean arterial pressure (MAP) responses to potassium-supplementation. We conducted a 7-day high-sodium intervention (307.8 mmol sodium/day) followed by a 7-day high-sodium with potassium-supplementation (60 mmol potassium/day) among 1906 Han Chinese participants from rural north China. BP measurements were obtained at the end of each intervention period using a random-zero sphygmomanometer. We identified significant associations between ADD1 variant rs17833172 and SBP, DBP, and MAP responses to potassium-supplementation (all <0.0001) that remained significant after adjustment for multiple comparisons. In participants that were heterozygous or homozygous for the G allele of this marker, SBP, DBP, and MAP response to potassium-supplementation were −3.52 (−3.82, −3.21), −1.41 (−1.66, −1.15) and −2.12 (−2.37, −1.87), respectively, as compared to the corresponding responses of 1.99 (0.25, 3.73), −0.65 (−0.10, −0.21), and −0.23 (−0.37, 0.83), respectively, for those who were homozygous for A allele. In addition, participants with at least one copy of the G allele of rs12503220 of the ADD1 gene had significantly increased DBP and MAP response to potassium-supplementation ( = 0.0041 and 0.01, respectively), which was also significant after correction for multiple testing. DBP and MAP responses to potassium-supplementation were −1.36 (−1.63, −1.10) and −2.07 (−2.32, −1.82) for those with at least G allele compared to corresponding responses of 0.86 (−0.68, 2.40) and −0.45 (−1.74, 0.84) for those who were homozygous for A allele. In summary, our study identified novel associations between genetic variants of the ADD1 gene and BP response to potassium-supplementation, which could have important clinical and public health implications. Future studies aimed at replicating these novel findings are warranted.

Keywords： blood pressure     genetics     polymorphism     die-tary potassium     potassium sensitivity     adducin 1 alpha (ADD1)    

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Title Author Date Type Operation

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

Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

LU Xiao-chun, GUO Sheng, RUAN Feng

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

Multiobjective image recognition algorithm in the fully automatic die bonder

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

Journal Article

An automated arc spray tooling system for rapid die-making of large-sized automobile body panels

HE Zhong-yun, LU Bing-heng, WANG Yi-qing, HONG Jun, TANG Yi-ping

Journal Article

Precision forging technology for aluminum alloy

Lei DENG, Xinyun WANG, Junsong JIN, Juchen XIA

Journal Article

Improving buckling critical stress of sheet with the elasti cpressure on the surfaces of sheet and it ’ s application

Song Aiping,Wang Longtai,Li Jizhong,Wang Shufeng

Journal Article

Review of small aspheric glass lens molding technologies

Shaohui YIN,Hongpeng JIA,Guanhua ZHANG,Fengjun CHEN,Kejun ZHU

Journal Article

The Theoretic Evaluation and Verification for the Necking Force of the Cone-shaped Concave Die

Hu Chengwu,Luo Wenbo,Peng Yanrong

Journal Article

Mechanism of hot-deformation and magnetic domains of anisotropic die-upset rare earth permanent magnets

Li Wei,Zhu Minggang

Journal Article

Research of 1 770 MPa galvanized steel wire for stay cable of domestic bridges

Ding Feng,Sang Chunming,Zhou Daiyi,Bai Bingdong

Journal Article

A Cyber-Physical Routing Protocol Exploiting Trajectory Dynamics for Mission-Oriented Flying Ad Hoc Networks

Die Hu, Shaoshi Yang, Min Gong, Zhiyong Feng, Xuejun Zhu

Journal Article

Genetic variants in the ADD1 and GNB3 genes and blood pressure response to potassium supplementation

Dai-Hai YU PhD, Jian-Feng HUANG MD, Ji-Chun CHEN MS, Jie CAO MS, Shu-Feng CHEN PhD, Dong-Feng GU MD, PhD, for the GenSalt Collaborative Research Group, De-Pei LIU PhD, Lai-Yuan WANG PhD, Jing CHEN MD, MSc, Jiang HE MD, PhD, Cashell E. JAQUISH PhD, Dabeeru C. RAO PhD, Charles GU PhD, James E. HIXSON PhD, Chung-Shiuan CHEN MS8, Paul K. WHELTON MD, MSc9,

Journal Article