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Статті в журналах з теми "Hydraulic crimping"

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Автор: Grafiati

Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

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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.

Patel, Jigisha, and Tirthankar Ghosh. "Assessment of noise-induced hearing loss (NIHL) of weaving factory workers in West Bengal, India - a pilot study." International Journal of Occupational Safety and Health 13, no. 1 (January 1, 2023): 69–77. http://dx.doi.org/10.3126/ijosh.v13i1.42281.

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Introduction: Excessive noise exposure is one of the majorly considered occupational stress for industrial workers. The operation of steel weaving machinery producing a high level of noise such as weaving machines, crimping machines, and hydraulic press machines for a prolonged period increases the risk of developing noise-induced hearing loss (NIHL). The main aim of the study was to assess the auditory health of the workers exposed to a high level of noise in a steel weaving factory and the prevalence of NIHL among workers. Methods: 26 subjects in the age group of 25-55 years from a steel weaving industry of Chinsurah town, Hooghly district of West Bengal were randomly selected with 5 years of exposure for the study. The control group was selected from the same age group, socioeconomic status and geographical location and having no history of such exposure. The physiological parameters of the workers, noise levels in the workplace and auditory functions and the risk of NIHL were assessed by standardized protocol and statistically analyzed. Results: The study indicated that steel weaving factory workers had significantly reduced hearing functionality at 4000Hz and 6000Hz in the left ear respectively. It also revealed that the workers were exposed to high noise exposure of 131dB near weaving machine, 113dB at crimping machine, and 84dB at hydraulic press machine respectively. Conclusion: A high level of noise exposure leads to deterioration in the hearing capabilities of the steel weaving industrial workers. Implementation of ergonomic interventions in the workplace and the use of personal protective equipment (PPE) may decrease the prevalence of NIHL and can help to prevent hearing loss in workers.

Wang, Shiyan, Youliang Gao, Peijian Xu, Xinyu Xiang, and Haijun Shen. "Automatic Monitoring and Control System Based on Automatic Control for Transmission Line Engineering Traverse Spread." Journal of Physics: Conference Series 2558, no. 1 (August 1, 2023): 012027. http://dx.doi.org/10.1088/1742-6596/2558/1/012027.

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Abstract This paper proposes the investigation of an automatic monitoring system of transverse diffusion of transmission line engineering based on automatic control, intending to enhance the safety of power grid operation and the effectiveness of detecting parameters like the size of the opposite side of the crimped wire. Using the same microcomputer as the primary control device, a transmission line automatic compression control system is constructed in this paper. It has three infrared sensors that can measure three groups of distances, an electric sensor that measures the hydraulic pump’s output, and an electric drive that controls the hydraulic pump’s opening and closing. The upper computer can count the number of wire movements and measure the distance traveled by each step of the wire. The lower machine moves the metal directly depending on the instructions from the upper computer, measures the hydraulic pump’s pressure, and measures the length of three distinct groups of hexagonal metal. Time pressure and three wire groups that are not connected are also visible in the lower computer’s serial port. This system reduces collision costs, saves a lot of labor, increases engineering and production efficiency, and can be useful in wire crimping technology.

Convelbo, C., P. Guetat, M. Cambillau, B. Allam, P. Bruneval, A. Lafont, and R. Zegdi. "Crimping and deployment of balloon-expandable valved stents are responsible for the increase in the hydraulic conductance of leaflets." European Journal of Cardio-Thoracic Surgery 44, no. 6 (April 3, 2013): 1045–50. http://dx.doi.org/10.1093/ejcts/ezt175.

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Kumar, Aniruddha, Amit Kulshrestha, Sachin Aher, Ashish V. Kolhatkar, V. V. Jayaraj, V. Karthik, D. B. Sathe, and R. B. Bhatt. "On the modification of wire wrapping process for fast Breeder reactor fuel Pins: Replacing hydraulic crimping with resistance spot welding." Nuclear Engineering and Design 411 (September 2023): 112441. http://dx.doi.org/10.1016/j.nucengdes.2023.112441.

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Soepardi, Sugiono, Kadi Istrianto, M. Zainal Fanani, Markus Samu Samu, Suharyanto Suharyanto, and Robet Perangin-angin. "Engineering Purse Line Hauler Machine For Hydraulic Axle Capstan On Mini Purse Seine Boat." PELAGICUS 4, no. 2 (May 31, 2023): 69. http://dx.doi.org/10.15578/plgc.v4i2.12279.

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Purse seine or purse seine is one of the dominant fishing tools for catching pelagic (surface) fish which operates by circling schools (schooling) of fish. In the process of circling a school of fish, the bottom must be crimped immediately and quickly using a crimping rope or what is usually called a "drawstring" so that the fish remain in the circle and do not escape. This research was conducted from August to October 2019 on the north coast of Pekalongan, Java Sea. The application of hydraulically powered capstan axle crimp rope pulling machines on small scale vessels is expected to increase effectiveness, operational safety and efficiency of time and energy. Especially for purse seine ships <30GT and can increase catches which in turn can increase fishermen's income. Based on the test results, it was found that the driving diesel RPM without a pulling load = 1303 / 1530 RPM; Maximum RPM of the winding capstan spool when without a pulling load = 45 / 51.5 RPM; Maximum speed of winding capstan spools without tension load = 40.5 / 58.5 meters/minute; RPM of the driving diesel when pulling the purse seine line = 1500 RPM; Maximum RPM of the capstan winder spool when pulling the purse seine line at an average load = 43.2 RPM; Maximum RPM of the capstan winder spool when pulling the heaviest load (maximum) purse seine crimp rope = 40.1 RPM; Maximum pulling speed of the towing machine at the average load of pulling the purse seine crimp rope = 40.07 meters/minute; Maximum pulling speed of the towing machine when the heaviest load is pulling the purse seine crimp rope = 37.2 meters/minute; Load towing capability = detected ± 1000kg.

Strelbitskyi, Viktor. "ДОСЛІДЖЕННЯ НЕСПРАВНОСТЕЙ ГІДРАВЛІЧНИХ РУКАВІВ ПРИ ЕКСПЛУАТАЦІЇ ВИЛОЧНИХ НАВАНТАЖУВАЧІВ В МОРСЬКИХ ПОРТАХ". International scientific and technical conference Information technologies in metallurgy and machine building, 24 квітня 2024, 120–23. http://dx.doi.org/10.34185/1991-7848.itmm.2024.01.020.

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This study focuses on hydraulic hoses utilized in the hydraulic systems of forklifts. The investigation examined 8 forklifts, each with a loading capacity of 10 tons. The check took place every six months over a three-year span. Before and after each shift, the forklift operator performed visual checks and hydraulic system and brake а inspections. The research findings indicated that the most frequent hose malfunction was a result of a rupture. The failure rate noticeably increased during the winter, attributable to the low temperatures' adverse effect on the hoses' physical and mechanical properties. Another common area of hydraulic hose failure is due to substandard crimping and minimal fitting depth in the sleeves..

"Test and Determine the Strength of Ferrule Joint Pipe Fitting." International Journal of Engineering and Advanced Technology 8, no. 6S2 (October 10, 2019): 758–61. http://dx.doi.org/10.35940/ijeat.f1275.0886s219.

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The tube connections in the cooling system are joints where a sleeve is crimped on the tube and then the tube is fitted between a nut and connector to ensure a leak proof joint. Earlier the crimping was done manually but the joints leaked in the field. A hydraulic tool is now available for crimping. The ability of the joint to prevent leakage depends on how well the sleeve 'bites' in the tube and how well the tube retains its original shape after crimping. These in turn depend on the (i) Material of the tube (ii) Material of the sleeve. Difference between the hardness of the sleeve and tube (with the sleeve being harder than the tube) Crimping pressure. Change in these parameters leads to different depth and amount of 'bite' and the extent to which the tube retains its original shape. A measure of the strength of the crimped joint is the amount of axial force needed to 'Pull Out' the sleeve after it has been crimped onto the tube. To create a variety of crimped joints where the parameters were varied. The size of the tube and thus that of the sleeve was not varied in order not to introduce additional variance in the parameters. A test set up to be created to hold a tube with both ends having a crimped joint in a tensile testing machine.

Sun, Mingcheng, Che Tan, Wei Tan, Di Wu, and Chaoqun Zhang. "Ultrasonic Imaging Detection of Strain Clamp Hydraulic Crimping Quality on Transmission Line." DEStech Transactions on Engineering and Technology Research, eeec (January 18, 2019). http://dx.doi.org/10.12783/dtetr/eeec2018/26882.

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GULYAKIN, ILYA, ANNA LANTSOVA, LYUDMILA NIKOLAEVA, MARIA DMITRIEVA, NATALIYA OBOROTOVA, OLGA ORLOVA, and NATALIA ZHURAVLEVA. "FEATURES OF THE DEVELOPMENT OF A LYOPHILIZED INJECTABLE DOSAGE FORM OF THE ORIGINAL ANTICANCER DRUG LCS-1208." International Journal of Applied Pharmaceutics, July 7, 2021, 102–5. http://dx.doi.org/10.22159/ijap.2021v13i4.41371.

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Objective: Development of a lyophilized injectable dosage form LCS-1208, an original antitumor drug based on an indolocarbazole derivative. Methods: The prepared solution of the injectable dosage form LCS-1208 is transferred to sterilizing filtration, which is carried out under vacuum on a «Stericup» filter unit with a filter pore size of 0.22 μm. The sterile solution of the injectable dosage form LCS-1208 is poured into sterile vials using a dispenser and lyophilized in a freeze-drying chamber. At the end of drying, the preparation is corked in the chamber of a sublimation unit using a hydraulic device and transferred to crimping with aluminum caps using a seaming machine. Quantitative determination of the drug content was determined by spectrophotometry using a standard sample at λ = 320±2 nm. The pH was determined by potentiometry. Results: A freeze-drying regimen for the injectable dosage form LCS-1208 has been developed. The required solution freezing temperature was established taking into account the presence of 2 eutectic zones: a solution of LCS-1208 in DMSO (-35 ÷-32) °С, an aqueous solution of Kollidon 17PF (-10 ÷-8) °С. As a result of a series of experiments, the optimal lyophilization regime was chosen that does not require preliminary freezing in a low-temperature chamber, with freezing on the shelves of freeze-drying at a temperature of-47 °C without their preliminary cooling. The most acceptable vial filling volume was determined, amounting to 3 ml, and the rate of temperature rise during secondary drying of the preparation was justified. When using the developed regime of lyophilization of the LCS-1208 solution, it was shown that it can be sublimated while preserving the initial qualitative and quantitative characteristics. Conclusion: In this article, using the example of creating a lyophilized injectable dosage form LCS-1208 (the original antitumor drug from the indolocarbazole group), the main problems that arose during the lyophilization of the selected composition of the model solution, as well as ways to improve the process.