Статті в журналах: "Clamping structure"

1

Chou, Bai Ge, Heng Zhi Cai, Gang Zhou, Ya Jun Zhang, and Jian Zhuang. "Design and Motion Simulation of the Clamping Mechanism of Micro-Structure Injection Molding Machine." Advanced Materials Research 945-949 (June 2014): 670–75. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.670.

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Micro-structure injection molding machine is mainly used for processing the plastic products in micron-size or with micro-structures. This paper focuses on the design and control of the clamping mechanism of micro-structure injection molding machine. Firstly, the deformation of the clamping mechanism was analyzed. The simulation results shows that the clamping force is 5.0051×105N, and it’s bigger than the design value 500kN. Secondly, the kinetic characteristic of the clamping was simulated by ADAMS software. The curves of the displacement, velocity, clamping force of moving platen were analyzed. Thirdly, the control model of clamping mechanism was established. And the LQR controller was designed and simulated by Matlab. The rise time is 0.010s, the settling time is 0.026s and the steady-state is 0.307m.

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2

Xu, Xun, Haidong Yu, Yunyong Li, and Xinmin Lai. "Compliant assembly deviation analysis of large-scale thin-walled structures in different clamping schemes via ANCF." Assembly Automation 40, no. 2 (November 3, 2019): 305–17. http://dx.doi.org/10.1108/aa-01-2019-0018.

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Purpose The structure stiffness is greatly affected by the fixture constraints during assembly due to the flexibility of large-scale thin-walled structures. The compliant deformation of structures is usually not consistent for the non-uniform stiffness in various clamping schemes. The purpose of this paper is to investigate the correlation between the assembly quality and the clamping schemes of structures with various initial deviations and geometrical parameters, which is based on the proposed irregular quadrilateral plate element via absolute nodal coordinate formulation (ANCF). Design/methodology/approach Two typical clamping schemes are specified for the large-scale thin-walled structures. Two typical deviation modes are defined in both free and clamping states in the corresponding clamping schemes. The new irregular quadrilateral plate element via ANCF is validated to analyze the compliant deformation of assembled structures. The quasi-static force equilibrium equations are extended considering the factors of clamping constraints and geometric deviations. Findings The initial deviations and geometrical parameters strongly affect the assembly deviations of structures in two clamping schemes. The variation tendencies of assembly deviations are demonstrated in details with the circumferential clamping position and axial clamping position in two clamping schemes, providing guidance to optimize the fixture configuration. The assembly quality of structures with deviations can be improved by configuration synthesis of the clamping schemes. Originality/value Typical over-constraint clamping schemes and deviation modes in clamping states are defined for large-scale thin-walled structures. The plate element via ANCF is extended to analyze the assembly deviations of thin-walled structures in various clamping schemes. Based on the proposed theoretical model, the effects of clamping schemes and initial deviations on the deformation and assembly deviation propagation of structures are investigated.

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3

Van Doan, Do, Adam Szeleziński, Lech Murawski, and Adam Muc. "Modelling Method of Dynamic Characteristics of Marine Thin-Walled Structure." Journal of KONES 26, no. 4 (December 1, 2019): 39–46. http://dx.doi.org/10.2478/kones-2019-0087.

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AbstractThin-walled structures are very popular in industries, especially in the field of shipbuilding. There are many types of equipment and structures of ships, which are made up of thin-walled structures such as hull, deck and superstructure. Therefore, the analysis and understanding of the static and dynamic characteristics of a thin-walled structure are very important. In this article, we focus on vibration analysis of a typical thin-walled structure-rectangular plate, a basic structure of the hull. Vibration analysis of a rectangular thin plate is conducted by two methods: numerical modelling method of the finite element on Patran-Nastran software platform and experimental method implemented in the laboratory of Gdynia Maritime University. Thin rectangular plate is fixed one end by four clamping plates and is modelled with finite elements and different meshing densities. The numerical model of thin rectangular plate is divided into four cases. Case 1, thin rectangular plate, and clamping plates are modelled with two-dimensional elements. Case 2, the rectangular thin plate is modelled with two-dimensional elements; the clamping plates are modelled with three-dimensional elements. Case 3, both the rectangular thin plate and clamping plates are modelled with three-dimensional elements. Case 4, the rectangular thin plate, and clamping plates are modelled with three-dimensional elements with larger mesh density to increase the accuracy of the calculation results. After that, the results of vibration analysis according to the numerical modelling method on Patran-Nastran software platform for these cases were compared with the measurement results. From there, assess the accuracy of analysis results of selected numerical model methods and the ability to widely apply this numerical model method to other marine structures.

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4

Deng, Jie, Shijing Zhang, Yiqing Li, Xuefeng Ma, Xiang Gao, Hui Xie, and Yingxiang Liu. "Development and experiment evaluation of a compact inchworm piezoelectric actuator using three-jaw type clamping mechanism." Smart Materials and Structures 31, no. 4 (March 11, 2022): 045020. http://dx.doi.org/10.1088/1361-665x/ac59da.

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Abstract A compact inchworm piezoelectric actuator using three-jaw type clamping mechanism is developed in this study. Different from the previous inchworm piezoelectric actuators constructed with guiding structures, the proposed actuator can drive an output shaft to realize linear motion without other auxiliary structures based on the automatic centering and guidance functions of the designed three-jaw type clamping mechanism, and a compact structure is obtained. The configuration of the actuator is presented to describe the operating principle in detail. Then the structures of the clamping and actuating units are designed by the assistance of finite element simulations. A prototype is fabricated and a compact structure is achieved with outer diameter of 34 mm and length of 40 mm. The experiments are performed to investigate the characteristics, a maximum speed of 155.5 μm s−1 and a thrust force of 12.3 N are achieved. The experimental results confirm that the proposed inchworm actuator can achieve a compact structure by adopting the designed three-jaw type clamping mechanisms, it has great potential in integration with precision equipment, which is conductive to apply in the fields of biological manipulation robots and aerospace devices.

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5

Srikanta Murthy, Avinash, Norhafiz Azis, Salem Al-Ameri, Mohd Mohd Yousof, Jasronita Jasni, and Mohd Talib. "Investigation of the Effect of Winding Clamping Structure on Frequency Response Signature of 11 kV Distribution Transformer." Energies 11, no. 9 (September 2, 2018): 2307. http://dx.doi.org/10.3390/en11092307.

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This paper presents an investigation on the sensitivity of frequency response of a 500 kVA, 11/0.433 kV distribution transformer with and without the presence of a winding clamping structure. Frequency response analysis (FRA) measurements of multiple test configurations were carried out with and without the presence of a winding clamping structure. Statistical analyses based on Pearson’s correlation coefficient (PCC), Spearman’s correlation coefficient (SCC), Kendall’s correlation coefficient (KCC), cross-correlation coefficient (CCF), root mean square error (RMSE), absolute sum of logarithmic error (ASLE), hypothesis test (F-test) and relative factor (RF) were applied to determine the effect of the winding clamping structure. It was found that the removal of the winding clamping structure has an impact on the frequency response signature at the frequency less than 2 kHz during offline measurement. It was found that ASLE and F-test are suitable methods that can be used to indicate the variation of frequency response caused by clamping structure removal of the distribution transformer under study.

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6

Baek, Soo-Whang, and Keun-Young Yoon. "Improving the Hybrid Electromagnetic Clamping System by Reducing the Leakage Flux and Enhancing the Effective Flux." Energies 12, no. 19 (October 1, 2019): 3762. http://dx.doi.org/10.3390/en12193762.

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In most industrial fields, mechanical clamping methods are traditionally used to transport heavy loads such as steel structures by fastening the load using bolts and nuts. However, this method can lead to industrial accidents during load transfer and does not consider the weight of the load. Recently, permanent magnet clamping methods have been proposed to prevent such accidents; for example, hybrid electromagnetic clamping systems (H-EMCSs), which combine permanent magnets and electromagnets and can adjust the clamping force according to the load weight. However, few studies have attempted to improve the electromagnetic structure and effective magnetic flux of H-EMCS. Specifically, H-EMCSs control the clamping force using several hybrid electromagnetic modules (H-EMMs); however, the leakage magnetic flux increases with an increasing number of H-EMMs. Therefore, the clamping force should be improved to avoid increasing the leakage magnetic flux. In this study, we propose a novel H-EMM structure and improve its electromagnetic force characteristics by changing the core shape and dimension effect in order to reduce the leakage flux and maximize the effective magnetic flux. Furthermore, we verify the improved electromagnetic force properties by experimentally validating the proposed model. This research can improve the safe and effective transfer of industrial loads.

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7

Sutcliffe, Brian T., and R. Guy Woolley. "Molecular structure calculations without clamping the nuclei." Physical Chemistry Chemical Physics 7, no. 21 (2005): 3664. http://dx.doi.org/10.1039/b509723c.

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8

Liu, Ming Zhu, Long Bin, and Ke Kuan Wang. "The Clamping Force of a Deepwater Flange Connecting Tool and the Bearing Capacity of the Pipeline." Advanced Materials Research 466-467 (February 2012): 799–803. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.799.

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A clamping mechanism for use in relatively the bearing capacity of the pipneline is described. The force analysis of the clamping mechanism is performed according to the operation of the deepwater flange connecting tool, and the clamping force of the clamping mechanism is determined according to the ultimate working condition of the deepwater flange connecting tool. At the same time, the strength and stability of the pipeline are also calculated using the thin-wall strength theory, and it is proved that the clamping force of the clamping is appropriate. The findings provide a theoretical basis for structure design and optimization of the clamping of the deepwater flange connecting tool.

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9

He, Qin, Qian Su, Ming Qin Zhang, Rui Jun Zhang, and Sheng Qu. "The Innovative Design of New-Style Clamping Automobile Tires Conveyance Based on TRIZ." Advanced Materials Research 335-336 (September 2011): 69–73. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.69.

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Abstract. This part analyzed clamping automobile tires conveyance’s research situation, summarized its failure problem and occurrence cause, and selected the important failure problem by RPN method; and then solved creatively clamping lever roller’s wear, clamping lever’s excessive damage owing to rise and decrease slightly, the automobile conveyance’s excessive damage owing to the car’s rollover and clamping lever’s bearing load unevenly; in the end, proposed the conceptual design of new-style clamping vertically automobile tires conveyance. The conveyance have a simple structure, decrease the clamping lever’s and car tire’s wear, avoid cantilever phenomenon owing to rise and decrease slightly, decrease the clamping lever’s strength and stiffness.

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10

Wang, Wenming, Shimin Zhang, Deguo Wang, Li Lin, Xiaoxiao Zhu, and Yingchun Chen. "Synchronous clamping control of marine umbilical cable tensioner." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 10 (December 14, 2012): 2328–36. http://dx.doi.org/10.1177/0954406212471104.

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The umbilical cable tensioner is a core component of deep-water oil and gas development, and it can lay and recover the umbilical cables to ensure the transmission of communication signals, electric signals or liquid injection. The displacements of tensioner’s clamping hydraulic cylinders, which are not synchronized as the nonlinear electro-hydraulic control system, results in the occurrence of the crawler mechanism’s stuck phenomenon or cause umbilical cable deformation or even cause damage by the extrusion in the umbilical cable’s clamping process. To ensure synchronous clamping, the structure scheme of umbilical cable tensioner, crawler mechanism, clamping mechanism and the hydraulic system of synchronous clamping control is designed in this study. This article also analyzes the function of structure parameters and hydraulic cylinders’ displacement, speed and acceleration, and builds the synchronous clamping mechanical model to reveal crawler mechanism’ clamping law. The study proposes the control strategy including the fast moving stage, the working stage and the pressuring stage based on proportional–integral–derivative control, and analyzes the characteristics of synchronous clamping control by building the synchronous clamping experimental platform in the lab environment. The experimental data shows that the tensioner’s hydraulic cylinders have excellent synchronous clamping performance and the theoretical analysis is feasible. The research has important guiding significance for the tensioner design, and provides theoretical support for the laying of the deep-sea umbilical cables.

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11

Wen, Huai Xing, and Wen Sheng Wang. "The Research on the Robot Vision System Based on the Target Clamping Technology." Advanced Materials Research 430-432 (January 2012): 1929–34. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1929.

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Introduces the structure and the components of industrial robot vision system. Through designing the gripping point, the location of the clamping point can be planned out in the clamping operation, and then by visual recognition algorithms to calculate the coordinate figure of the clamping point relative to the camera. Then the calculated values would transmitted to computer, by whose control of the robot’s move can the operation of clamping on the target object be achieved.

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12

Wang, Gang, Wei Guo Zhang, Zhi Yuan Lu, and Ming Yu Zhao. "Virtual Design and Test of Manipulator’s Clamping Mechanism for Carrying Cylindrical Lithium Battery." Applied Mechanics and Materials 241-244 (December 2012): 1828–34. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.1828.

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Designed a manipulator’s clamping mechanism for a cylindrical electric vehicle lithium battery carrying, made virtual structure design with software UG, realized the UG and ADAMS data exchange with Parasolid format, carried on virtual dynamic simulation for clamping force and contact constraint with ADAMS, virtually tested and analyzed force in coordination with kinetic parameters of clamping mechanism, finally, design of the clamping mechanism meets the requirements of large-scale battery inspection and maintenance of production lines.

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13

Song, Qiang, Guang Ju Si, Dong Ning Su, and Kang Min Zhong. "Green Manufacturing: A Lever-Wedge Self-Locking Force Amplifying Clamping Device Driven by Linear Motor." Applied Mechanics and Materials 44-47 (December 2010): 522–26. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.522.

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Here introduces a kind of clamping device which is driven by linear motor and makes use of lever-wedge serial mechanism to amplify input force and to realize self-locking. We analyze its working principle and structure feature, give the calculation formulas of force amplification coefficient and output force. Compared with hydraulic clamping device or pneumatic clamping device, this kind of clamping device has the advantages: few conversion segments, no energy consumed during machining and no environment pollution.

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14

Qi, Ruolong, Xinyuan Mao, Ke Zhang, and Renbo Xia. "Accurate Clamping Method of Multipoint Flexible Fixture for Large Complex Surface." Mathematical Problems in Engineering 2021 (July 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/5568801.

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In the field of aviation and astronautics, large complex surface parts such as aircraft cabin cover are complex, varying in model, and produced in small batch. In order to reduce fixture cost and improve production efficiency, a variable multipoint and multi-DOF supporting fixture is designed. The coordinate system of the complex structure fixture is defined, and the kinematics of the multibody structures driven by air cylinders are modeled according to the topological principle. With the help of this data structure, fast and optimal search for clamping state can be realized. With the dichotomy method, the driving amount of the electric cylinder of the suction cups and the two rotation angles of two rotation axes at the end of the linkages are solved accurately. Based on the digital twin simulation method, the precise clamping motion of flexible fixture is calculated for an aircraft cockpit cover with a software developed by the authors in C++ language on the Visual studio platform. The distance between the clamping point and the surface was verified with a laser tracker. Finally, the practical experiment of a real cockpit cover clamping proves the practicability and effectiveness of the proposed method.

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15

Guo, Hun, Dun Wen Zuo, Guo Xing Tang, Min Wang, and Yang Jing Guo. "Analysis of Optimal Clamping Schemes for Aero-Multi-Frame Monolithic Components." Key Engineering Materials 375-376 (March 2008): 445–48. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.445.

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Many thin-walled aero-parts have complex structure, and high machining accuracy is required. But because of their poor rigidity, it is easy to bring machining deformation caused by the existence of the clamping residual stress, and influences machining accuracy of workpiece. At the present time it is a focal point how to reduce the deformation the machined surface. Present studies mainly focus on the influences of clamping points, clamping order and clamping force on residual stresses. It is few studied for clamping schemes how to influence the residual stresses and the fatigue resistance of the machined parts. To reflect the relationship between clamping schemes and residual stresses and fatigue resistance, finite element models with different clamping schemes were built and the clamping process was simulated. A conclusion is obtained that it is advisable to adopt even and symmetry distributed clamps and multi-point clamps to reduce the workpiece distortion of aero-multi-frame components due to the clamping. This study conclusion has been validated by the actual production.

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16

Yu, Jin, Xiu Feng Zhu, and Yan Liang Gao. "The Analysis of Optimal Clamping Scheme Based on Genetic Algorithm." Advanced Materials Research 1055 (November 2014): 218–23. http://dx.doi.org/10.4028/www.scientific.net/amr.1055.218.

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This paper indicates a kind of research on the optimization of clamping scheme for the joint thin-walled parts in milling process .The three-dimensional model of four-flute end mill and the part are made by UG. The effect of different clamping scheme on the deformation of joint structure is simulated by the finite element analysis software ABAQUS. With the purpose of getting the minimum of the average deformation, MATLAB genetic algorithm optimizes the clamping scheme and acquires the best clamping scheme. The simulation and optimization provide an effective method for controlling the deformation due to different clamping scheme of aeronautic joint-shaped workpiece.

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17

Ren, Y., and C. F. Beards. "An Experimental Study on the Dynamic Response of a Beam Structure Containing a Pseudo Joint." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 208, no. 5 (September 1994): 321–28. http://dx.doi.org/10.1243/pime_proc_1994_208_134_02.

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The effects of frictional damping on the dynamic response of a beam structure have been investigated. The frictional damping was contributed from the slip mechanisms in a ‘pseudo’ joint, that is a joint that did not take any static load. Using pseudo joints for vibration control has significant advantages over using joints that are designed both to take static load and to introduce frictional damping; because there is almost no restriction on the configuration of the pseudo joint, the undesirable side effects related to the frictional damping such as fretting corrosion of contact surfaces and loss of static stiffness are zero if the frictional damping from a pseudo joint is utilized. An ‘optimum’ clamping force was found which minimized the magnitude of the frequency response function (FRF) of the structure under excitation. A reduction of about 20 dB in the amplitudes of the FRFs was achieved by adjusting the clamping force at the joint. Frictional damping was found to be significant over the measured frequency range of 20-2000 Hz, and it was particularly effective over the range of 20-1000 Hz. The magnitudes of the FRFs of the structure were determined by the ratio of clamping force to excitation force. They were insensitive to the change of clamping force near its optimum value; also the optimum clamping force was not sensitive to small modifications to the structure. Therefore, utilizing frictional damping in pseudo joints is an effective technique for vibration control.

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18

Deng, Yuan Chao. "A Theoretic Study on Cam-Clamping Device." Advanced Materials Research 295-297 (July 2011): 1536–39. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1536.

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A theoretical study has been made on the cam-clamping device. In this article, we consider specifically the calculations of cam geometry, calculations of clamping force and clamping torque, conditions for self-locking, and conditions for contact strength. Machine fixtures are essential in the process of mechanical manufacturing. There are many different types of fixtures, such as manual jig, pneumatic clamps, hydraulic fixtures, electric fixtures, etc. There are also many ways of clamping, such as incline clamp, screw clamp, eccentric circle clamp, hinge clamp [1], among which the eccentric circle clamp finds wide applications, especially in fast-clamping devices. Although the circular eccentric fixture possesses the advantages of simple structure, convenient manufacturing, and low cost, it suffers the drawbacks of small clamping force, short clamping-surface travel distance, and unreliable self-locking mechanism. The cam-clamping device discussesed in this article involves replaceing the eccentric circle with a cam, as shown in Fig. 1. The cam profile curve can be designed according to any requirements. The advantages of this replacement are obvious, in addition to preserving the advantages of the circular eccentric fixture, the cam-clamping can be designed according to the actual needs of clamping paths and selection of the appropriate cam profile to improve the self-locking.

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19

Lu, Lin, Ming Di Wang, and Kang Min Zhong. "Two-Position and Highly-Efficient Clamping Device Based on Lever-Toggle Force Amplifier Driven by Pneumatic Muscle." Advanced Materials Research 201-203 (February 2011): 2841–45. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2841.

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The clean compressed air is taken as power transmission medium in pneumatic clamping devices, and when cutting after clamping the workpiece, the energy are not consumed any more. So it can be said that it is a green clamping technology. However, a low pressure of pneumatic driving makes a lot of pneumatic fixtures too bulky in size.A new innovation design idea of clamping mechanism based on pneumatic muscle and the eternallever-toggle force amplifier is described in this paper, in which the pneumatic muscle is instead of traditional rigid cylinder. The pneumatic muscle has some features such as extremely simple structure, good flexibility, the big ratio of output force and diameter/weight, etc. Thus, this device can get much greater clamping force on the condition of reducing the size and weight of the structure definitely. In addition, using two pneumatic muscles alternately, it can enable the time of processing a workpiece to overlap with the time of unloading another workpiece, and which can improve the production efficiency significantly.

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20

Алиев and M. Aliev. "Design and Principle of Operation of the Clamping Mechanism Artificial Urinary Sphincter A-1." Journal of New Medical Technologies 20, no. 4 (December 20, 2013): 123–26. http://dx.doi.org/10.12737/2746.

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The paper deals with the methods of treating urinary incontinence in the men. The analysis of parameters of available artificial urinary sphincters is carried out. The paper describes the reasons for improving clamping mechanism of the sphincter. It shows the structure of a new clamping mechanism and its operating principle. The device provides urinary control preventinginvolunta-ry leakage of urine from the bladder. As a result of experimental study, parameters of urethra compression and optimal filling of the clamping mechanism were defined. The paper describes the design advantages of the new clamping mechanism of artificial urinary sphincter A-l.

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21

Li, Zheng, Zhirong Su, Liang Zhao, Haitao Han, Zhanyu Guo, Yuyang Zhao, and Hexu Sun. "Design and Locomotion Study of Stick-Slip Piezoelectric Actuator Using Two-Stage Flexible Hinge Structure." Micromachines 12, no. 2 (February 4, 2021): 154. http://dx.doi.org/10.3390/mi12020154.

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A novel piezoelectric actuator using a two-stage flexure hinge structure is proposed in this paper, which is used in a compact and high-precision electromechanical field. The two-stage flexure hinge structure is used to provide horizontal thrust and vertical clamping force to the driving feet, which solves the problems of unstable clamping force and insufficient load capacity in traditional stick-slip piezoelectric actuators. Firstly, the main structure of the driver and the working process under the triangular wave excitation voltage are briefly introduced. Secondly, after many simulation tests, the structure of the actuator is optimized and the stability of the structure in providing clamping force is verified. Finally, through the research of the operating performance, when the amplitude is 150 V and the frequency is 3.25 kHz as the excitation source, the maximum speed can reach 338 mm/s and can bear about 3 kg load. It can be seen from the analysis that the two-stage flexure hinge structure can improve the displacement trajectory.

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22

Gong, Hai Xia, Lin Peng, Pei Ran Jiang, and Li Quan Wang. "Mechanics Analysis on Leveling Tool of Offshore Jacket Platform." Applied Mechanics and Materials 44-47 (December 2010): 1223–28. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1223.

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The paper aimed to leveling operation of offshore jacket platform, studied mechanics principle of the leveling tool. When the clamp blocks inserted into the pile wall in leveling operation, the pile’s surface presented some indentations of elastic-plastic deformation, which can increase the cross-lifting force but the clamp is susceptible to be damaged certainly. So, special clamping block was designed including its material and mechanical structure, and force analysis of the pile under the action of the clamping blocks was finished, and dynamics simulation of contact process between the clamping block and the pile was finished too. An experimental prototype was developed to verify the clamping principle. Experimental results show that the clamping principle is correct and the leveling tool can meet actual needs.

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23

Prydalnyi, Borys. "MECHATRONIC DEVICE FOR TWO-STAGE CLAMPING OF CYLINDRICAL OBJECTS IN MACHINE TOOL SPINDLES." Journal of Mechanical Engineering and Transport 13, no. 1 (2021): 118–23. http://dx.doi.org/10.31649/2413-4503-2021-13-1-118-123.

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The design of an electromechanical device for fixing cylindrical objects in the spindle units of technological equipment is presented. The new two-stage concept of the clamping process with a separated first stage is developed. The design of the presented mechanism provides advanced capabilities for control and regulation of its operating characteristics. The control system with the possibility of carrying out the first stage of clamping in automatic mode and without connecting to the upper-level control system in a technological machine is proposed. The involvement of electrical devices for the conversion and transmission of energy instead of their mechanical analogues is used as one of the promising ways to increase the performance efficiency of machine units. It helps to simplify and expand control capabilities, as well as reduce energy losses during intermediate transformations. The absence of mechanical energy converters in the proposed structure helps to reduce energy losses on intermediate transformations. The simplicity of the design expands the possibilities of integration of the proposed clamping mechanism into the structure of both new and existing technological machines in order to modernize it. This allows to achieve technical results, such as an expansion of the metalworking machines functionality, increase the level of automation of the clamping process and the accuracy of clamping objects in spindle units. The task is achieved by equipping the jaw of the clamping chuck with a special mechanism for identifying the presence of the object for clamping. For this goal, the clamping jaw is equipped with a probe that is capable of simultaneous force interaction with the object and the plunger. The plunger is rigidly attached to the magnetic element whose magnetic field has the possibility to interact with the magnetic field sensor. The sensor transmits its electrical signals to the control system of the device. The research results are aimed at meeting the requirements for effective control of clamping mechanisms with the possibility of automatic operation according to a preset algorithm for maintenance of optimal characteristics of a clamping process and a wide range of optional settings.

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24

Li, Xiang Yang, and Jing Liu. "Frequency Response of Longitudinal Magnetoelectric Effect in Piezoelectric-Magnetostrictive Clamping Structure Coupled through Normal Stress." Applied Mechanics and Materials 530-531 (February 2014): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amm.530-531.37.

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Magnetoelectric (ME) materials have attracted continuous attention due to their potential applications in the fields of sensors, actuators, and transducers. A large ME coupling originated from a clamping structure was reported. ME coefficient of 0.95V cm1Oe1was obtained without amplifier at the planar acoustic frequency 60 KHz. The results show that large ME coupling can be obtained in the clamping structure through normal stress, and longitudinal ME effect could be better than transverse ME effect.

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25

Zhang, Ke, Sheng Hao Tong, Ye Tian, and Jia Sun. "The Optimum Design for Clamping Mechanism of Wind Power Maintenance Lifting Platform." Applied Mechanics and Materials 684 (October 2014): 286–90. http://dx.doi.org/10.4028/www.scientific.net/amm.684.286.

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Using ProE software establish the digital prototype of wind power maintenance lifting platform and the clamping mechanism, import the clamping mechanism into ANSYS to analysis the static strength. Select the forced major important parts in clamping mechanism,hydraulic cylinder connecting pin board,use the Design Explorer modules in ANSYS Workbench introducing the response curves to do the optimum design, set the thickness of hydraulic cylinder connecting pin board and the work position of the hydraulic cylinder for the input parameters variable,with pin board by stress as output parameter variable, from nine groups of data, selecting the smallest stress group as the new design, analysis and calculate again. Results show that by stress of the optimized clamping mechanism is obviously improved, and the structure of whole clamping mechanism more reasonable and compact.

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26

Li, Longfei, Ming Lei, Yaoming Xie, Henry F. Schaefer, Bo Chen, and Roald Hoffmann. "Stabilizing a different cyclooctatetraene stereoisomer." Proceedings of the National Academy of Sciences 114, no. 37 (August 28, 2017): 9803–8. http://dx.doi.org/10.1073/pnas.1709586114.

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An unconventional cis-cis-cis-trans or (Z,Z,Z,E) structure B of cyclooctatetraene (COT) is calculated to lie only 23 kcal/mol above the well-known tub-shaped (Z,Z,Z,Z) isomer A; one example of this type of structure is known. The barrier for B returning to A is small, 3 kcal/mol. However, by suitable choice of substituents, the (Z,Z,Z,E) isomer can be made to lie in energy below the tub-shaped structure. Steric, clamping, and electronic strategies are proposed for achieving this. In the steric strategy, the C8H4(CH3)2(C(tBu)3)2 structure B is predicted to lie 21 kcal/mol below structure A, which is separated from form B only by a small barrier. A simple clamping strategy, effective for COT planarization, does not influence the A/B isomerization much. But, if the clamping group is aromatic (a fused benzene, pyrrole, thiophene, furan), the subtle interplay of potential aromaticity with clamping can be used to confer persistence if not stability on the (Z,Z,Z,E) isomer. An electronic strategy of a different kind, push–pull substitution on the COT ring, was not very effective in stabilizing the B form. However, it led us to vicinal amine–borane-substituted normal COTs that proved to be quite good at activating H2 in a frustrated Lewis pair scenario.

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27

Chen, Jian, Jin Wang, Guo Dong Lu, and Zheng Qi Ling. "Research on the Key Technologies for New Large Dual-Platen High-Precision Clamping System." Advanced Materials Research 97-101 (March 2010): 64–68. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.64.

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Анотація:

High- precision and large scale are the developing trend for injection molding machine clamping system .This paper compared the characteristics of three-platen toggle and dual-platen hydraulic clamping system. The key impact factors that effecting plastic parts` precision from clamping system were discussed systematically first time. Based on these analyses, a new clamping system has been proposed and manufactured to improve the plastics parts` precision, including three new technologies: new type dual-platen structure, parallelism adaptive correction technology and numerical controlled hydraulic servo system technology. It has been applied in practical machine successfully, and experiment result proves that it is effective enough to satisfying the high-precision molding of large plastics parts.

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28

Bai, Hua, and Yi Du Zhang. "Research on Thermally Induced Deformation of Reinforcing Plate Based on Finite Element Simulation." Applied Mechanics and Materials 197 (September 2012): 139–43. http://dx.doi.org/10.4028/www.scientific.net/amm.197.139.

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The change of ambient temperature will cause deformation during the machining process of large-scale aerospace monolithic component. Based on finite element simulation, thermally induced deformation of reinforcing plate is studied in such aspects as reinforcement structure, clamping method and temperature change, and contact function in finite element software is used to simulate the unilateral constraint between workpiece and worktable. The results indicate that reinforcing plate will produce warping deformation due to the change of ambient temperature. Different reinforcement structures and clamping methods have important influence on the deformation positions and degrees, and the deformation is proportional to the temperature change.

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29

Zhang, Hua Wei, Wei Xia, and Zhi Heng Wu. "Finite Element Analysis and Topology Optimization of the Clamping Unit in a Two-Platen Injection Machine." Applied Mechanics and Materials 117-119 (October 2011): 1535–42. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.1535.

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In this paper, the clamping unit of a two-platen injection molding machine was modeled by Pro/ENGINEER, and was imported to Altair HyperWorks. In HyperMesh module, the finite element model was set up, ANSYS has been used in the finite element analysis of the clamping unit and the deformation and stress results were obtained. Based on the topology optimization of HyperWorks/OptiStruct, recommendations to improve the structure of the clamping mechanism are presented; the results showed that less material was used while its performance was maintained.

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30

Yang, L., S. Mei, x. Shu, and w. Luo. "Design of Clamp Flip Mechanism of Automatic Sleeve Slit Machine." Grand Altai Research & Education / Наука и образование Большого Алтая, no. 2(13) (December 7, 2020): 63–68. http://dx.doi.org/10.25712/astu.2410-485x.2020.02.008.

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Shirts belong to the traditional classic clothing, men's shirts to grasp the details is particularly important, sleeve is an important element of men's shirts, its structure and technological form determines the quality and style of shirts. A sewing machine actuator — automatic sleeve machine cloth flip mechanism are studied in this paper. Through the cooperation of pneumatic claw and stepping motor driving synchronous belt, the clamping mechanism completes the flip and overlay of large sleeve slit. By studying the realization mode of folding function, the motion of the clamping mechanism is analyzed, the turning path is designed, the transmission scheme of clamping and flipping is designed, the structure form of the mechanism is determined, the component parameters are calculated and selected, and the mechanism simulation is carried out.

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31

Xu, Qi Rui, and Fan Wu. "Removal Method of Core Shaft of Primary Mirror." Key Engineering Materials 552 (May 2013): 221–26. http://dx.doi.org/10.4028/www.scientific.net/kem.552.221.

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The structure of core shaft combined with mercury belt is widely used as the primary mirror supporting structure of 1 meter class and 2 meter class large aperture telescope currently. In order to reduce the structure jitter of primary mirror, the fitting clearance between core shaft and shaft sleeve is very small, so clamping stagnation occurs during installation and disassembling process of core shaft. The removal method of clamping stagnation of core shaft is introduced. Mechanical analysis of core shaft and primary mirror is applied to make sure that the primary mirror is safe. Some tools are designed specially, and the process and the attention points to remove core shaft are introduced. In this way, the clamping stagnation of core shaft can be removed easily. The core shaft of 1 m class primary mirror was removed by the method and the primary mirror was excellent without damage.

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32

Prydalnyi, Borys, and Heorhiy Sulym. "Identification of Analytical Dependencies of the Operational Characteristics of the Workpiece Clamping Mechanisms with the Rotary Movement of the Input Link." Acta Mechanica et Automatica 15, no. 1 (March 1, 2021): 47–52. http://dx.doi.org/10.2478/ama-2021-0007.

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Abstract The research is devoted to the problem of determining the efficiency of the workpiece fixing mechanism operation. Improving characteristics of workpiece fixing is one of the required conditions to increase the cutting modes, which may help to enhance the machining productivity. The study investigates the main characteristics and general features of a new structure of clamping mechanisms with electromechanical actuators for fixation of rotation bodies. The main advantages of using electromechanical clamping actuators with self-braking gear are presented. Two simplified dynamical models for the description of different stages of the clamping process are developed. The calculation scheme was formulated to find out how the mass-geometric parameters of mechanism elements should influence the main characteristics of the clamping mechanisms of this type.

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33

Liu, Xiao Gen, and Yi Wang Bao. "Reliability Evaluation of Glass Curtain Wall via Vibration Detection." Key Engineering Materials 492 (September 2011): 410–14. http://dx.doi.org/10.4028/www.scientific.net/kem.492.410.

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Developing efficient onsite damage detection and safety evaluation methods for glass curtain wall is still a challenging task. In this work, a simple approach to predict the failure and risk of falling down of curtain wall glass was developed through the relationship between the natural frequency changes and the declined reliability of the structures. Natural frequencies of the curtain wall glass under various clamping conditions were determined using dynamic tests. It was discovered that, with the decrease of the clamping force at the boundary of the glass specimen, the measured natural frequencies decreased linearly. Thus, the in-service capacity in edge clamping (e.g. boundary is loosed or failure of the supporting structure) of the curtain wall glass can be identified by its natural frequency changes. The expected lowest safety natural frequency of a curtain wall glass (given elastic parameters, shape and size) is given. The implementation of this detection method is described, and the practicability and feasibility validated.

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34

Li, Ying Jun, Fang Wang, Qi Zhang, Chang Cun Li, and Yong He. "The Research of Grouting Sandblasting Carrying Manipulator Based Wax Casting-Line." Applied Mechanics and Materials 496-500 (January 2014): 557–60. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.557.

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Mechanization and automation are the general trend of Investment casting in the world. The paper briefly discusses the sandblasting process of investment, and introduces the shell casting process. Carrying manipulator design is proposed to complete the investment casting process. The terminal arm and other major components of structural design are discussed. The terminal clamping structure is modeled. The parameters of the terminal clamping structure are designed. The research can provide some reference for the development and design of grouting sandblasting carrying manipulator based wax casting-line.

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35

Sha, Yong Bai, Xiao Peng Wan, and Xiao Ying Zhao. "The Structure Design of the Mechanical Clamping Claw of the Automatic Arranging Drill Pipe System." Advanced Materials Research 510 (April 2012): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.510.165.

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This paper presents the structure design, the working principle and the relevant calculation of the mechanical clamping claw of the land rigs automatic arranging drill pipe system. Applying the Generative Structural Analysis module of the CATIA, we can get the Von Mises stress image to show the stress distribution. The finite element analysis provides a simple effective method for the design of the structure of the mechanical clamping claw. Through this device the drill pipe can be transferred automatically and circularly from the rat hole to the pipe racking system and from pipe racking system to the mouth of the well.

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36

Wu, Peng, Na Xue, Yun Cai Lu, Chao Yu, and Yi Ming Wu. "Study on Typical Compact Structures and Faults of 220kV Cable-Conductor Bushings." Applied Mechanics and Materials 672-674 (October 2014): 803–9. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.803.

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According to two typical COT bushing faults, three typical 220kV cable-conductor bushings (COT, TOM and BRDLW) widely used in the power grid are analyzed about bushing compact structure. Bushing pressing structure, installation clamping force, deformation deviation and sealing system are discussed in the paper. The study found that the installation clamping force and the reeds adjustment range of COT bushing is smaller than others. The manufacturability deviation and the poor condition will cause hidden trouble to the bushing sealing system. Last, several suggestions about bushing maintenance are given for the COT bushing.

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37

Park, Kwan Sik, Jae Hyuk So, Keun Yeong Oh, and Kang Min Lee. "Analysis Study on Axial Force in Bolted Connection under Fatigue Load." Applied Mechanics and Materials 858 (November 2016): 57–60. http://dx.doi.org/10.4028/www.scientific.net/amm.858.57.

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Анотація:

High-strength bolted connection is widely used for steel structure construction. Because high-strength bolted connection has simple constructability and structural qualification. Especially friction type with high-strength bolted connection has high stiffness and fatigue strength. At this time, initial clamping force is one of main factor to affect the strength and deformation behavior of connection. Therefore, the objective of this study is to investigate reduction of initial clamping force in high-strength bolted connection under fatigue load. And the parameter of this study is the size of the bolt and 3 types of initial clamping force. The analysis is used the finite element analysis program ANSYS Workbench.

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38

Liu, Kai, Hai Ying Zhou, and Ming Jiang. "Research on Device of Hydraulic Pushing." Advanced Materials Research 580 (October 2012): 260–62. http://dx.doi.org/10.4028/www.scientific.net/amr.580.260.

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The new device of hydraulic pushing device achieves enclasping of clamping device and steel rail locking effect by the wedge clamping on the both side of the steel rail, so as to provide thrust and pulling force action point for the cylinder of hydraulic equipment. Compare with other devices, the new type of device has more advantages like : simple structure, reliable clamp, easy erection and high efficiency. To further optimize the mechanical clamping device, the pressure and the friction coefficient of the wedge. the shell and the rail were analyzed emphatically. Combining experimental data and the reasonable angle of wedge and optimizing design direction was applied.

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39

Fares, Oday Saad, and Jasim Farhood Hussen. "High gain multiphase boost converter based-on capacitor clamping structure." Indonesian Journal of Electrical Engineering and Computer Science 24, no. 2 (November 1, 2021): 689. http://dx.doi.org/10.11591/ijeecs.v24.i2.pp689-696.

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<p>In the last few years, the non-isolated dc converters involving high voltage gain with adequate performance are becoming quite popular in industrial applications. This is resulting in high voltage and current stress on the power device (switches and diodes), as well as a limited output voltage with a high duty cycle. This paper proposes a multi-phase non-isolated boost converter that uses capacitor clamping to increase output voltage while reducing stress across the power device. There are two stages in the proposed converter (first stage is three inductors and three switches and the second stage is clamper circuit of three capacitors and three diodes). The proposed converter is high voltage gain, with low voltage stress through switches transistors. To justify the theoretical analysis, the concept was validated through mathematical analysis and by simulation using MATLAB/SIMULINK. The results carried out the results permit the converter behavior and performance to be accurately.</p>

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40

Ul Hassan, Noor, Murat Kilic, Emin Okumus, Bahadir Tunaboylu, and Ali Murat Soydan. "Experimental determination of optimal clamping torque for AB-PEM Fuel cell." Journal of Electrochemical Science and Engineering 6, no. 1 (April 21, 2016): 9. http://dx.doi.org/10.5599/jese.198.

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<span lang="EN-GB">Polymer electrolyte Membrane (PEM) fuel cell is an electrochemical device producing electricity by the reaction of hydrogen and oxygen without combustion. PEM fuel cell stack is provided with an appropriate clamping torque to prevent leakage of reactant gases and to minimize the contact resistance between gas diffusion media (GDL) and bipolar plates. GDL porous structure and gas permeability is directly affected by the compaction pressure which, consequently, drastically change the fuel cell performance. Various efforts were made to determine the optimal compaction pressure and pressure distributions through simulations and experimentation. Lower compaction pressure results in increase of contact resistance and also chances of leakage. On the other hand, higher compaction pressure decreases the contact resistance but also narrows down the diffusion path for mass transfer from gas channels to the catalyst layers, consequently, lowering cell performance. The optimal cell performance is related to the gasket thickness and compression pressure on GDL. Every stack has a unique assembly pressure due to differences in fuel cell components material and stack design. Therefore, there is still need to determine the optimal torque value for getting the optimal cell performance. This study has been carried out in continuation of development of Air breathing PEM fuel cell for small Unmanned Aerial Vehicle (UAV) application. Compaction pressure at minimum contact resistance was determined and clamping torque value was calculated accordingly. Single cell performance tests were performed at five different clamping torque values i.e 0.5, 1.0, 1.5, 2.0 and 2.5 N m, for achieving optimal cell performance. Clamping pressure distribution tests were also performed at these torque values to verify uniform pressure distribution at optimal torque value. Experimental and theoretical results were compared for making inferences about optimal cell performance. A clamping torque value of 1.5 N m was determined experimentally to be the best for getting optimal performance as well as uniform pressure distribution for this specific fuel cell.</span>

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41

Zeng, Qing Liang, Jing Cui, and Wen Ming Zhao. "Simulation Analysis for Hydraulic Clamping Force of Bidirectional Hydraulic Lock' Valve Spool Based on Fluent." Advanced Materials Research 542-543 (June 2012): 1091–95. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.1091.

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Bidirectional hydraulic lock is a key component of hydraulic system of the truck crane[1]. By using Fluent software, this paper simulates and analyses the hydraulic clamping phenomenon, which happens in the truck crane outrigger bidirectional hydraulic lock's spool in the case of taper exists, as well as the center lines of spool and valve sleeve are eccentric, and the effect of different kinds of pressure-equalizing grooves on hydraulic clamping force, then concludes that the number, the shape and the size of pressure-equalizing grooves, and whether pressure-equalizing grooves are concentric can take effect on clamping force, thus a new way is prompted to improve the structure of bidirectional hydraulic lock.

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42

Watson, M. A., K. J. Mathias, N. Maffulli, and D. W. L. Hukins. "The effect of clamping a tensioned wire: Implications for the Ilizarov external fixation system." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 217, no. 2 (February 1, 2003): 91–98. http://dx.doi.org/10.1243/09544110360579295.

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Анотація:

This study demonstrates that clamping a tensioned wire can cause a reduction in wire tension. Tension (about 1275 N) was applied to a wire that was subsequently clamped, using cannulated bolts, to the steel half-ring of an Ilizarov external fixator. The tension in the wire was monitored before, during and after clamping. The apparatus was disassembled and the deformations in the wire caused by the clamps were measured. This experiment was repeated 15 times. When the wire was clamped to the frame, the wire tension was reduced by 22 ± 7 per cent (mean ± standard deviation, SD). The drop in wire tension was linearly correlated ( r = 0.96; p < 0.001) with the deformation caused by the bolts. A finite element (FE) model of the wire was also constructed. The model was pre-stressed (tensioned), and the clamping effect replicated. This analysis showed that clamping the wire could be considered to squeeze the wire outwards (like toothpaste from a tube) and so reduce its tension during fixator assembly. To assess the magnitude of this effect in the clinical situation, the FE model analysis was repeated to replicate clamping a 1.8-mm-diameter wire to a 180-mm-diameter steel Ilizarov ring component. The analysis showed that for these conditions the tension reduced by 8–29 per cent. The results of this study highlight a general engineering problem: how can a tensioned wire be secured to a structure without an appreciable loss of tension? If the performance of the structure depends on the wire tension, this performance will change when the wire is secured.

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43

Si, Guang Ju, Kang Min Zhong, and Jun Peng Jia. "Two-Point Floating Clamping Device Based on Fixed Cylinder with Double-Piston and Toggle-Lever Force Amplifier." Advanced Materials Research 201-203 (February 2011): 2220–23. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2220.

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Two-point floating clamping device, widely used in manufacturing field, can effectively ensure the same clamping force on different workpieces or different surfaces in one workpiece. But due to the application of unitary suspended articulated cylinder, traditional two-point floating devices have disadvantages such as poor working status, great impaction, vibration and noise. A kind of innovatively designed two-point floating clamping devices, with rigidly fixed cylinder replacing unitary suspended articulated cylinder, is presented in this paper. To solve the problem of insufficient degrees of freedom, three different methods are applied. This device has significant advantages in compact structure, small impaction and vibration noise. Moreover, the working principle and mechanical calculation formulas are presented in this paper, which is instructive to the industrial field.

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44

Li, Shi Quan, Bei Chen, and Gui Hua Xie. "Finite Element Analysis of Anchorage Structure for FRP Tendon." Advanced Materials Research 1088 (February 2015): 858–61. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.858.

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FEM is important research method for the design of the new structural, which with practicality and repeatability. FEM model of the anchorage is established by ANSYS. Extracting and fitting the radial stress distribution curve of the surface of the metal tube clamping. The impact of clip inclination, cone angle difference and pretension to radial stress are analyzed.

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45

Guo, Wen Feng, Jian Jun Qu, Juan Ding, Yan Qin, and Yan Li. "Design of a Long Distance Unidirectional Piezoelectric Motor Based on Non-Resonant Inchworm Principle." Key Engineering Materials 572 (September 2013): 217–20. http://dx.doi.org/10.4028/www.scientific.net/kem.572.217.

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Анотація:

The advantages of linear piezoelectric motor which has low velocity, large output force, non-electromagnetic disturbance and high response speed are concerned wildly in astronautic industry and manufactural industry. A unidirectional and linear piezoelectric motor has been designed based on these advantages. The stiffness and resonant frequencies of the clamping structure and driving structure are calculated by mathematic model. The characteristics of long distance, slow velocity and large output force are realized. This motor can be used in the equipment which needs long distance, small inertia, large driving force and disposable movement. The stiffness and resonant frequencies of clamping structure and driving structure, no-load characteristic and motion characteristics under different loads are tested in the experiment. The results of the stiffness satisfy the theoretical design. The no-load resonant frequencies are high and the maximum resonant frequency dwindles with increasing load.

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46

Lord, Charles E., and Jem A. Rongong. "A tangential microslip model for circularly and elliptically loaded structures." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 6 (September 30, 2015): 900–909. http://dx.doi.org/10.1177/0954406215608409.

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Анотація:

It is well known that the noise and vibration control of structures is a continuing challenge. With many structures this is commonly achieved through passive vibration damping, often using viscoelastic materials. It is sometimes, however, that the use of such materials is not permitted as their properties change over time, or when they are subjected to low and high temperature environments. For these structures and structural elements, it is often that clamping or applied boundary conditions are critical for providing the energy dissipation through microslip. This makes it necessary to understand the level of damping that arises from the clamping zones. In general, the estimation of damping is complicated in that most structures are not unidirectionally loaded and can have a planar path of motion (e.g. gas turbine blades, circular motion valves). Although it is typical during experiments and simulations to reduce a structure into a single axis of excitation, this can often be an over simplification which does not describe the dynamics of the system; but should be included. This paper presents a biaxial planar motion tangential microslip model that accounts for the vibratory loads arising from circular and elliptical motion. This model vectorially decouples and reduces the planar vibratory circular and elliptical motion into two separate independent tangential microslip models. The models account for tip loading and for centroid loading within the microslip region of the clamping zone. Each analytical microslip model is presented and is compared to numerical simulations using finite elements. The analytical models are then coupled to demonstrate the net effect that various eccentricities have on the overall energy dissipation within the structure. The coupled models are then compared to numerical simulations using finite elements through ANSYS.

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47

Ding, Wen Hua, Hua Deng, Yi Zhang, and Yao Qing Ren. "Optimum Design of the Jaw Clamping Mechanism of Forging Manipulators Based on Force Transmissibility." Applied Mechanics and Materials 157-158 (February 2012): 737–42. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.737.

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Анотація:

In this paper, the jaw clamping mechanism of a forging manipulator is regarded as a slider-crank mechanism. First, the force Jacobian matrix of the mechanism is obtained according to the dual relationship of velocity Jacobian matrix and force Jacobian matrix. Then, the performance atlases of the global force transmission index and the input space index that represents the motion range of the jaw are drawn with different inputs for the mechanisms of the nondimensional parameters. Furthermore, we research the effect of these structure parameters of the mechanism on the gripping force transmission and input space, and find an optimal range in the force transmission atlas. Finally, we synthesize a detail optimal flowchart of the jaw clamping mechanism of forging manipulators based on force transmissibility. A jaw clamping mechanism of a forging manipulator is studied as an example, and results show that the method presented in this paper is effective for finding an optimal gripper mechanism. The research in this paper can be served as fundamentals of design and optimization of the jaw clamping mechanism of forging manipulators.

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48

Ding, Cai Hong, and Na Feng. "Study on the Mechanical Characteristics of an Electrode Tab-Clamp for Lithium-Ion Battery Formation." Applied Mechanics and Materials 249-250 (December 2012): 707–11. http://dx.doi.org/10.4028/www.scientific.net/amm.249-250.707.

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Анотація:

In the formation process of lithium-ion battery, the clamping force of the electrode tab-clamp is a very important factor for lithium-ion battery charge-discharge performance. Different from the traditional spring type tab-clamp, this paper proposes a leaf-spring type tab-clamp, that could produce the deformation of leaf-spring by the micro-motion of an actuating cylinder to provide a controllable clamping force of the tab-clamp upon the electrodes of lithium-ion battery. It is verified that the leaf-spring type structure is available and feasible through finite element analysis (FEA). According to the data from FEA, the relational expression between the clamping force and the micro-motion of the actuating cylinder is drawn out, and an impact analysis about design parameters to the clamping force is accomplished and some useful results are got. The study of this paper is helpful to guide mechanical design of the electrode tab-clamp for lithium-ion battery charging and discharging and to improve its mechanical performance.

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49

Zhou, Wan Chun, and Dong Min Liu. "The Creative Design of Injector Clamping Mechanism." Advanced Materials Research 418-420 (December 2011): 2166–69. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2166.

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Abstract. Analysis of a certain topological structure characteristics of clamping mechanism of injection machine, according to general principles, converts it into only containing Deputy General of the connecting rod and rotating chain. Bodies comprehensive theory of numbers after distribution combined with rod classes are general Atlas of kinematic chain. After identifying design constraints, on the redistribute members and turn the pair, you can get all man foot design requirements of viable specific Atlas of kinematic chains. Then every possible specific kinematic chain materialized to the schematic diagram of mechanism. Designers are on this basis through the kinematics and dynamics analysis to determine the best new clamping mechanism of injection machine.

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50

Su, Chang Qing, Jing Li, and Bao Rui Du. "Size Optimization of the Pillars in the Flexible Gripping Tooling Stent." Advanced Materials Research 538-541 (June 2012): 2754–58. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.2754.

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Анотація:

Large flexible clamping tooling stent is mostly volume which wasted a lot of materials. Structure size is to optimize the details of the flexible clamping tooling optimization design. It is by changing the properties of the structural unit - for example, the shell element thickness, the cross-sectional properties of the beam element, the stiffness of the spring element and the quality of the mass element to achieve a certain design requirements (such as stress, mass, displacement)。This design is use of hyper mesh software to optimize the size of the pillar on the flexible clamping tooling bracket. The pillars can be as a shell for analysis, a stress constraint is specified materials at least, reduce the weight of the parts, save the cost of production to achieve the optimization purposes.

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