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the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 289-298 doi: 10.1007/s11465-016-0393-y

Abstract: Existing literature indicates that tensile properties exhibit strong dependence on the rotational speed, traverse speed, and axial force of the tool that was used.is employed to produce the functional relationships between tensile properties and the three inputs (rotationalspeed, traverse speed, and axial force) of the FSW process.A high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min.

Keywords： tensile properties     ultimate tensile strength     tensile elongation     friction stir welding     tool rotationalspeed     genetic programming     welding speed    

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Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-021-0671-1

Abstract: The axial piston pumps in aerospace applications are often characterized by high-speed rotation to achieveduring operation, leading to considerable churning losses (more than 10% of total power losses) at high rotationalThe churning losses deserve much attention at the design stage of high-speed axial piston pumps, butThe calculated drag torque agrees well with the experimental data over a wide range of rotational speedsThe presented analytical model provides practical guidelines for reducing the churning losses in high-speed

Keywords： axial piston pump     rotating parts     high rotational speed     churning losses     drag torque    

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Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 305-309 doi: 10.1007/s11465-009-0036-7

Abstract: Its critical speed is calculated by a new calculation method with roller bearing stiffness and dampingare numerically studied, and the influences of an oil film and damping on the critical speed are alsoRegular curves of the relationship between the geometric parameters and the system critical speed areThe results show that with increasing roller length and radial load, the critical speed increases; andThis means that an oil film will decrease the critical rotational speed of the rotor system.

Keywords： roller bearing     bearing-rotor system     design value     critical rotational speed    

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Cutting heat dissipation in high-speed machining of carbon steel based on the calorimetric method

QUAN Yanming, HE Zhenwei, DOU Yong

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 175-179 doi: 10.1007/s11465-008-0022-5

Abstract: The cutting heat dissipation in chips, workpiece, tool and surroundings during the high-speed machiningWater is used as the medium to absorb the cutting heat; a self-designed container suitable for the high-speedchips, and two other containers are adopted to absorb the cutting heat dissipated in the workpiece and toolThe temperature variations of the water, chips, workpiece, tool and surroundings during the closed high-speedthe main cutting force is obtained according to the measured cutting force and predetermined cutting speed

Keywords： cutting system     medium     temperature     flux     tool    

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Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 116-122 doi: 10.1007/s11709-008-0015-9

Abstract: The bending and rotational capacities of the composite connections were measured in terms of beam curvatures

Keywords： rotational     effective     deflection calculation     semi-continuous composite     full-scale semi-rigid    

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Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 28-33

Abstract:

Based on how to improve the inherent thermal performance of high speed high precision machine tools

Keywords： high speed high precision machine tool     thermal characteristic analysis     thermal structure optimization    

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Energy saving design of the machining unit of hobbing machine tool with integrated optimization

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0694-2

Abstract: The machining unit of hobbing machine tool accounts for a large portion of the energy consumption duringAn integrated optimization model for reducing tool displacement and energy consumption is developed onResults show that the energy consumption and tool displacement of the machining unit are reduced, indicating

Keywords： energy saving design     energy consumption     machining unit     integrated optimization     machine tool    

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Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 410-416 doi: 10.1007/s11465-012-0341-4

Abstract: The present investigation aims at developing a magneto rheological (MR) fluid damper for suppressing toolwere conducted to arrive at a set of electrical, compositional and shape parameters that can suppress toolIt was observed that the use of MR fluid damper reduces tool vibration and improves the cutting performance

Keywords： tool vibration     magneto rheological damper     hard turning     surface finish     tool wear    

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Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotational

Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 66-80 doi: 10.1007/s11465-019-0570-x

Abstract: The parallel spindle heads with high rotational capability are demanded in the area of multi-axis machineparallel spindle heads and the corresponding collaborative 5-axis manipulators with 2-dimension (2D) large rotationalIn order to construct 2D rotational degrees of freedom (DOF), a platform with 2-dimension revolute jointsIn order to provide constant rotational axis for the platform, a class of redundant limbs are designedThe results show that these manipulators have large 2D rotational angles than the traditional A3/Z3 heads

Keywords： parallel mechanism     redundant mechanism     large rotational angles     machine tools     2R1T spindle head     collaborative    

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Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 610-621 doi: 10.1007/s11465-020-0596-0

Abstract: The design, fabrication, and testing of soft sensors that measure elastomer curvature and mechanical finger bending are described in this study. The base of the soft sensors is polydimethylsiloxane (PDMS), which is a translucent elastomer. The main body of the soft sensors consists of three layers of silicone rubber plate, and the sensing element is a microchannel filled with gallium-indium-tin (Ga-In-Sn) alloy, which is embedded in the elastomer. First, the working principle of soft sensors is investigated, and their structure is designed. Second, the relationship between curvature and resistance is determined. Third, several sensors with different specifications are built in accordance with the structural design. Experiments show that the sensors exhibit high accuracy when the curvature changes within a certain range. Lastly, the soft sensors are applied to the measurement of mechanical finger bending. Experiments show that soft curvature sensors can effectively reflect mechanical finger bending and can be used to measure the bending of mechanical fingers with high sensitivity within a certain working range.

Keywords： soft sensor     Ga-In-Sn alloy     strain sensing     curvature sensing     mechanical finger bending    

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Study on High Efficiency Machining Technology and Its Applications

Ai Xing

Strategic Study of CAE 2000, Volume 2, Issue 11,   Pages 40-51

Abstract: machining field and the focus of the majority of cutting technology research has been directed toward high-speedThey include mainly the fundamental theory of high-speed machining, new system for development of ceramiccutting tool materials as well as the theories and techniques of electrical-discharge grinding machining

Keywords： high efficiency machining     high-speed machining     ceramic cutting tool material     electrical-discharge grinding    

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A novel six-legged walking machine tool for

Jimu LIU, Yuan TIAN, Feng GAO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 351-364 doi: 10.1007/s11465-020-0594-2

Abstract: This study proposes a novel six-legged walking machine tool consisting of a legged mobile robot and aportable parallel kinematic machine tool.of the large workspace of the legged mobile platform and the high precision of the parallel machine toolFinally, an application scenario is shown in which the walking machine tool steps successfully over ahierarchical motion planning scheme and demonstrate the extensive potential of the walking machine tool

Keywords： legged robot     parallel mechanism     mobile machine tool     in-situ machining    

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Green catalytic engineering: A powerful tool for sustainable development in chemical industry

Kequan Chen, Dangguo Cheng, Chong Peng, Dan Wang, Jintao Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 835-837 doi: 10.1007/s11705-018-1756-1

Abstract:
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A PLATFORM TO AID SELECT THE OPTIMAL TOOL TO DESIGN GUIDE RNAS

Frontiers of Agricultural Science and Engineering   Pages 296-305 doi: 10.15302/J-FASE-2022479

Abstract:

● Summaries on sgRNAs design.

Keywords： CRISPR/Cas     Aid-TG     gene editing     sgRNA design     web server    

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Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 431-437 doi: 10.1007/s11465-010-0110-1

Abstract: transformation matrix (HTM) method are applied in establishing the kinematic error model of five-axis machining toolmodel, a new method for the kinematic error separation in five-axis numerical control (NC) machining toolto measure the relative distance between the spindle and the worktable in the motion of NC machining tooltelescoping double ball bar is substituted into the model to obtain kinematic error of NC machining toolis high precision and can be applied to effectively and conveniently measure the five-axis machining tool

Keywords： error modeling     error separation     telescoping double ball bar     five-axis numerical control (NC) machining tool    

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Title Author Date Type Operation

the tensile properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational speed

Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO

Journal Article

Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Journal Article

Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Journal Article

Cutting heat dissipation in high-speed machining of carbon steel based on the calorimetric method

QUAN Yanming, HE Zhenwei, DOU Yong

Journal Article

Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Journal Article

Thermal characteristic analysis and thermal design technology for high speed high precision machine tools

Gao Jianmin,Shi Xiaojun,Xu Aiming and Zhao Boxuan

Journal Article

Energy saving design of the machining unit of hobbing machine tool with integrated optimization

Journal Article

Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Journal Article

Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotational

Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO

Journal Article

Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Journal Article

Study on High Efficiency Machining Technology and Its Applications

Ai Xing

Journal Article

A novel six-legged walking machine tool for

Jimu LIU, Yuan TIAN, Feng GAO

Journal Article

Green catalytic engineering: A powerful tool for sustainable development in chemical industry

Kequan Chen, Dangguo Cheng, Chong Peng, Dan Wang, Jintao Zhang

Journal Article

A PLATFORM TO AID SELECT THE OPTIMAL TOOL TO DESIGN GUIDE RNAS

Journal Article

Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Journal Article