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

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 (rotationalA 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 rotational    

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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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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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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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Iterative HOEO fusion strategy: a promising tool for enhancing bearing fault feature

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0725-z

Abstract: As parameter independent yet simple techniques, the energy operator (EO) and its variants have received considerable attention in the field of bearing fault feature detection. However, the performances of these improved EO techniques are subjected to the limited number of EOs, and they cannot reflect the non-linearity of the machinery dynamic systems and affect the noise reduction. As a result, the fault-related transients strengthened by these improved EO techniques are still subject to contamination of strong noises. To address these issues, this paper presents a novel EO fusion strategy for enhancing the bearing fault feature nonlinearly and effectively. Specifically, the proposed strategy is conducted through the following three steps. First, a multi-dimensional information matrix (MDIM) is constructed by performing the higher order energy operator (HOEO) on the analysis signal iteratively. MDIM is regarded as the fusion source of the proposed strategy with the properties of improving the signal-to-interference ratio and suppressing the noise in the low-frequency region. Second, an enhanced manifold learning algorithm is performed on the normalized MDIM to extract the intrinsic manifolds correlated with the fault-related impulses. Third, the intrinsic manifolds are weighted to recover the fault-related transients. Simulation studies and experimental verifications confirm that the proposed strategy is more effective for enhancing the bearing fault feature than the existing methods, including HOEOs, the weighting HOEO fusion, the fast Kurtogram, and the empirical mode decomposition.

Keywords： higher order energy operator     fault diagnosis     manifold learning     rolling element bearing     information fusion    

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New method for computer numerical control machine tool calibration: Relay method

LIU Huanlao, SHI Hanming, LI Bin, ZHOU Huichen

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 301-304 doi: 10.1007/s11465-007-0053-3

Abstract: Relay measurement method, which uses the kilogram-meter (KGM) measurement system to identify volumetric errors on the planes of computer numerical control (CNC) machine tools, is verified through experimental tests. During the process, all position errors on the entire plane table are measured by the equipment, which is limited to a small field. All errors are obtained first by measuring the error of the basic position near the original point. On the basis of that positional error, the positional errors far away from the original point are measured. Using this analogy, the error information on the positional points on the entire plane can be obtained. The process outlined above is called the relay method. Test results indicate that the accuracy and repeatability are high, and the method can be used to calibrate geometric errors on the plane of CNC machine tools after backlash errors have been well compensated.

Keywords： positional     volumetric     information     process     repeatability    

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Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution Article

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 591-598 doi: 10.1631/FITEE.1500454

Abstract: the proof mass of vibratory gyroscopes, but it did not achieve high resolutions in angle detection of rotationaldifferential capacitive detection structure is presented to measure the tilt angle of the rotor of a novel rotational

Keywords： Micro-angle detection     Differential capacitive structure     Rotational gyroscope     Structure optimization    

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Design and Fabrication of Multiphase Composite Ceramic Tool Materials

Xu Chonghai,Ai Xing

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 71-74

Abstract: between the mechanical properties and the material compositions of the multiphase composite ceramic toolThen, an advanced Al2〇3—SiC-(W,Ti)C multiphase composite ceramic cutting toolproposed in the present study is reasonable and feasible for the design of multiphase composite ceramic tool

Keywords： ceramic tool material     multiphase composite     material design     model     mechanical property    

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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: during operation, leading to considerable churning losses (more than 10% of total power losses) at high rotationalThe calculated drag torque agrees well with the experimental data over a wide range of rotational speeds

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

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Title Author Date Type Operation

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

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

Journal Article

Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

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

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

Iterative HOEO fusion strategy: a promising tool for enhancing bearing fault feature

Journal Article

New method for computer numerical control machine tool calibration: Relay method

LIU Huanlao, SHI Hanming, LI Bin, ZHOU Huichen

Journal Article

Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Journal Article

Design and Fabrication of Multiphase Composite Ceramic Tool Materials

Xu Chonghai,Ai Xing

Journal Article

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

Journal Article