Готові списки джерел за темами / Hydraulic crimping

Добірка наукової літератури з теми "Hydraulic crimping"

Автор: Grafiati

Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

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Статті в журналах з теми "Hydraulic crimping":

Kaithari, Dr Dinesh Keloth. "Hydraulic Jack operated Hose Crimping Machine." International Journal of Students' Research in Technology & Management 3, no. 8 (November 5, 2015): 455–58. http://dx.doi.org/10.18510/ijsrtm.2015.385.

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The present paper deals with developing of a crimping machine that can crimp hydraulic hoses with its fitting without the use of electricity. Detailed literature review indicates the fabrication of crimping machine that operates with electricity that inspired the authors to develop a hydraulic crimping machine that works without electrical power. Such a crimping machine is very useful when the rig is in movement and suitable for emergency crimping work in order to avoid shutdown time.The author has used Autodesk inventor software for designing critical components of the machine and obtained safety factor more than one for all the critical components. Safety factor less than one leads to the unsafe working condition of the critical parts. Fabrication of the whole assembly has been completed successfully for the required crimping for a hose size of 19.05 mm. The crimping machine has been tested successfully for crimping the required hose size. The design of the machine can be altered so that it can accommodate different die sizes in order to crimp hoses of different sizes.

Wei, Zhou Ling, and Bo Fu. "Design and Analysis of Nut Crimping Machines." Applied Mechanics and Materials 233 (November 2012): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amm.233.88.

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In view of the growing market demand for self-locking nuts and the relative backward processing technology, a nut crimping machine was studied. According to the working principle of nut crimping and performance requirements, the body structure of the nut crimping machine was designed. The stress analysis of the main stressed components was performed using simulation Xpress function of SolidWorks. Results show that body structure has high strength and rigidity. Based on electro-hydraulic proportional technology, the hydraulic control circuit was developed. The design results improve the control precision on speed and pressure of the nut crimping machine and ensure the quality of self-lucking nuts.

Yao, Y., A. Z. Qamhiyah, and X. D. Fang. "Finite Element Analysis of the Crimping Process of the Piston-slipper Component in Hydraulic Pumps." Journal of Mechanical Design 122, no. 3 (September 1, 1999): 337–42. http://dx.doi.org/10.1115/1.1286188.

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Hydraulic pumps and motors are widely used in mobile equipment for construction, mining and agriculture. The piston-slipper component is one of the critical parts of a hydraulic pump. A crimping process is used for connecting the piston to the slipper component. Like most of the manufacturing processes that involve large deformations, high stresses are created in the slipper and piston during the crimping process. This paper presents a finite element method for the analysis of the stresses, strains, and forces associated with the crimping process. This method can be used in the optimization of the piston, slipper and die designs. The commercial finite element package ANSYS was used to simulate the crimping process. The simulation procedure is used to obtain a better understanding of the effect of the die geometry on the crimping process. [S1050-0472(00)00303-2]

Valliere, Kevin W. "Development of a Hydraulic Crimping Tool." Applied Occupational and Environmental Hygiene 18, no. 1 (January 2003): 16–17. http://dx.doi.org/10.1080/10473220301393.

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Ye, Zhongfei, Kai Pang, Yuanxiang Du, Guifeng Zhao, Shao Huang, and Meng Zhang. "Simulation Analysis of the Tensile Mechanical Properties of a Hydraulic Strain Clamp-Conductor System." Advances in Materials Science and Engineering 2020 (April 9, 2020): 1–19. http://dx.doi.org/10.1155/2020/4591812.

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Herein, a three-dimensional (3D) finite element model of a strain clamp-conductor system is established, with an NY-300/40 compression-type strain clamp taken as an example. The tensile load-carrying capacity of the strain clamp under standard crimping conditions is analyzed with LS-DYNA software, and the simulation results are compared with the experimental results to verify the accuracy of the model. On this basis, the tensile load-bearing capacity and failure mode of the strain clamp-conductor system are analyzed when the crimping length between the steel anchor and steel core is insufficient. Studies have shown that the grip strength of a strain clamp is provided mainly by the crimping between the steel anchor and the steel core. Under standard crimping conditions, the tensile load-bearing capacity of the strain clamp can meet the design requirements. Moreover, because the crimping length between the steel anchor and steel core is sufficient, the strain clamp fails due to aluminum strand breakage rather than the steel core being pulled out of the steel anchor. When the crimping length is insufficient, the grip strength of the strain clamp decreases with decreasing crimping length. Although the absolute value of the grip strength does not decrease significantly, the failure mode gradually changes from the breakage of the aluminum strands to the steel core being pulled out of the steel anchor. For the NY-300/40 compression-type strain clamp, the corresponding critical crimping length (i.e., when the change in failure modes occurs) between the steel core and the steel anchor is 50∼60 mm.

Pasynkov, Andrey A., Sergey V. Nedoshivin, and Nadezhda S. Pasynkova. "Isothermal Crimping of Thick-Walled Shells." Materials Science Forum 1037 (July 6, 2021): 293–99. http://dx.doi.org/10.4028/www.scientific.net/msf.1037.293.

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Products with varying cross-sectional height are used in various hydraulic pipelines [1-4]. These products are very easy to manufacture. However, when it comes to hydraulic pipelines of fuel systems, it is essential to use materials resistant to aggressive effects, which are rather difficult to handle [5-8]. In this case, one of the possible options for obtaining such products is hot forming, namely crimping. In view of this, the article considers the crimping of shells made of titanium 6Al-4V alloy. Various combinations of technological parameters and their influence on the flow of metal and the geometry of products are considered. Rational deformation-rate conditions of deformation are found.

Kim, Minseok, and Jiyeon Shim. "Selection of Magnetic Pulse Crimping Process Conditions to Improve Crimped Terminal Quality." Metals 13, no. 11 (November 17, 2023): 1903. http://dx.doi.org/10.3390/met13111903.

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The crimping of copper terminals via hand-operated and hydraulic compressors is used to generate a compressive force between a terminal and a wire, generally on a worksite. However, this equipment often causes compression defects because non-uniform pressure is applied to the terminal surface in the radial direction during crimping. When the crimped terminal is connected to electrical parts such as the power transmission system, a low-quality crimped terminal can separate from the wire strands, increasing resistance to current flow through the terminal, energy loss, and the risk of fire due to overheating. For this reason, Magnetic Pulse Crimping (MPC), which can yield highly durable crimped terminals with uniform quality, has recently been developed. This process uses only the magnetic force generated by high electromagnetic interaction between the crimping coil part and the surface of the terminal, without physical contact. The objective of this research was to confirm the superiority of the MPC process over the conventional crimping process and then analyze the effects of the main process parameters, including the crimping length and the charge energy on the crimping part, so that this new process can be applied at worksites. To realize these goals, copper terminals and 35 mm2 copper wire strands were employed, and various types of crimping parts were manufactured under different crimping conditions. In particular, the distribution of electromagnetic force on the crimped parts were analyzed via numerical analysis. The crimping part performance was improved when the MPC process was applied to terminal crimping. In particular, decreasing the crimping length led to increased crimping quality, while increasing the charge energy caused increases in the compression ratio and pullout strength. However, excessively high charge energy caused the edge to break the wire strands; therefore, it is important to select the proper charge energy.

Shirgaokar, Manas, Gracious Ngaile, Taylan Altan, Jang-Horng Yu, John Balconi, Richard Rentfrow, and W. J. Worrell. "Hydraulic crimping: application to the assembly of tubular components." Journal of Materials Processing Technology 146, no. 1 (February 2004): 44–51. http://dx.doi.org/10.1016/s0924-0136(03)00843-4.

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Klimova, L. G. "Effects of residual stresses on the bending stiffness of shafts strengthened by enveloping de-formation." Proceedings of Irkutsk State Technical University 25, no. 4 (September 1, 2021): 412–20. http://dx.doi.org/10.21285/1814-3520-2021-4-412-420.

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The aim was to study the effects of technological residual stresses on the bending stiffness of cylindrical parts of shafts and axes. Experiments were conducted for elongated cylindrical specimens made of steel grade 35 with a diameter of 30 mm using boring and turning methods. Specimens were annealed in a protective medium to remove initial residual stresses. Experiments were carried out using an Amsler laboratory hydraulic testing machine and VK8 grade hard-alloy matrices. The experiments showed that, for an extremely low degree of relative crimping of 0.1 to 0.5%, the size of the layer with tangential residual compression stresses gradually decreases. The stiffness of such cylindrical workpieces remains almost unchanged. An increase in relative crimping (from 0.5 to 1.2%) leads to a decrease in resi dual compression stresses on the part surface. The layer thickness with tangential residual compression stresses starts to increase. This leads to a decreased residual buckling and an increased bending stiffness. It was found that the degree of relative crimping has no effect on the variation of distribution depth of axial residual stresses. Optimal distribution of tangential residual compression stresses can be reached by increasing their depth. A linear relationship was found for relative crimping of 0.1 to 1.0%. The highest bending resistance was recorded for specimens strengthened by residual crimping of about 1.0%. By processing workpieces using enveloping deformation with crimping of 0.1% and loading them with a transverse force of 0.6 kN, bending distortion can be decreased and the strength of parts can be increased by 5 times. It was found that the bending stiffness of cylindrical shafts is greatly affected by residual compression stresses. The bedding depth of residual stresses has various effects on the stiffness of cylindrical parts. Thus, correct use of strengthening enveloping deformation can form a high-quality surface layer on parts with the pre-defined distribution of residual stresses.

Larin, Sergey Nikolaevich, Valery I. Platonov, and Olga A. Tkach. "Crimping Power Modes with Thinning of the Deformable Element of the Steel Pipe." Materials Science Forum 1037 (July 6, 2021): 233–38. http://dx.doi.org/10.4028/www.scientific.net/msf.1037.233.

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Adapter parts are common in hydraulic pipelines. They can connect pipes of different cross-sections. The article discusses the crimping of pipes. Its peculiarity is that the pipe section to be crimped undergoes thinning, which is ensured by the gap between the tools. This process was studied to determine the deformation forces and the influence of various parameters of the operation on its value.

Більше джерел

Дисертації з теми "Hydraulic crimping":

Le, Mentec Guichon Ronan. "Caractérisation et Optimisation d'assemblages sertis hydrauliquement." Electronic Thesis or Diss., Ecole centrale de Nantes, 2023. http://www.theses.fr/2023ECDN0044.

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Le sertissage de tubes représente un enjeu important en ingénierie car c’est un besoin récurrent dans presque toutes les industries ayant besoin de solidariser des pièces tubulaires entre elles. On retrouve notamment ces assemblages dans l’industrie navale de défense pour la propulsion des bâtiments de surface ou des sous-marins. Au fil des années, de nombreux chercheurs se sont intéressés aux liaisons serties avec pour but de déterminer les paramètres procédé, géométriques et matériaux prépondérants en vue de les dimensionner de façon optimale. Afin d’augmenter leur résistance, ils ont essayé d’implanter une gorge au sein de la liaison en préconisant certaines formes géométriques mais en occultant les critères de conception indispensables à la tenue de la liaison dans le temps. Plus tard, nous avons assisté à l'émergence des procédés dynamiques qui grâce aux grandes vitesses de déformations qu'ils génèrent, permettent de réduire le retour élastique dans certains cas. Cela peut donc être un autre moyen de rendre des liaisons serties plus résistantes. Le premier objectif de ce travail de thèse consiste à construire et fiabiliser un modèle numérique de simulation du sertissage par expansion hydraulique (quasi-statique) en vue de proposer un profil de gorge annulaire optimisé respectant des critères de conception. Le second axe vise à analyser dans quelle mesure le sertissage électrohydraulique (dynamique) présente des bénéfices supplémentaires en termes de résistance à l'arrachement et d'étanchéité en comparaison d’un procédé quasi-statique
Tube crimping is a major challenge in engineering because it is a recurring requirement in nearly all industries that need toconnect tubular parts together. These assemblies are particularly found in the defense naval industry for the propulsion of surface vessels or submarines. Over the years, numerous researchers have been interested in crimped joints with the aim of determining the predominant process, geometric, and material parameters for optimal sizing. To increase their strength, they have attempted to introduce a groove within the joint by recommending certain geometric shapes but neglecting essentialdesign criteria necessary for the long-term integrity of the assembly. Later, we witnessed the emergence of dynamic processes that, thanks to the high strain rates they generate, can reduce springback in certain cases. This can, therefore, be another way to produce crimped joints more resilient. The primary objective of this thesis work is to build and validate a numerical simulation model of crimping by hydraulic expansion (quasistatic) in order to propose an optimized annulargroove profile respecting design criteria. The second one aims to analyze to what extent electrohydraulic crimping (dynamic) offers additional benefits in terms of pull-out strength and tightness compared to a quasi-static process

Частини книг з теми "Hydraulic crimping":

Kaithari, Dinesh Keloth, Pradeep Kumar Krishnan, and Hisham Mohammed Salim Al Burtamani. "Recent Design and Development of Hydraulic Jack Operated Hose Crimping Machine." In Advanced Aspects of Engineering Research Vol. 16, 95–113. Book Publisher International (a part of SCIENCEDOMAIN International), 2021. http://dx.doi.org/10.9734/bpi/aaer/v16/1739c.

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Тези доповідей конференцій з теми "Hydraulic crimping":

Norquist, Eric D., Jonathon E. Slightam, and Mark L. Nagurka. "Modeling, Validation, and Investigation of an Electrohydraulic Crimping Hand Tool." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1653.

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Abstract Due to their high power density, hydraulic systems are increasingly adapted for human scale devices. For example, commercial and utility electricians use electrohydraulic cutting and crimping tools, rather than human powered tools, to cut and crimp wires that exceed 25mm in diameter. These tools greatly reduce worker-related fatigue and strain-type injuries. To improve electrohydraulic tool technology, there is a need to increase the number of applications from a single battery charge. This paper develops a high fidelity nonlinear lumped parameter model of an electrohydraulic crimping hand tool used by professional electricians. The eleventh-order model can predict tool performance with an average error of 6.9% and 4.4% with respect to the maximum energy consumption and crimp time, respectively. Simulation studies were conducted to investigate reducing the energy consumption of the tool. An independent parameter sweep was performed on the pump piston diameter. The gear ratio was a dependent parameter linked through the maximum motor torque. Increasing the pump piston diameter while increasing the gear ratio was shown to decrease the energy consumption of the tool during crimping applications. Simulations suggest that up to 30% energy can be saved per crimp by increasing the pump piston diameter and gear train ratio.