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Journal articles on the topic 'Punching machine'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Tang, Zi Long, and Jian Chang Yuan. "Modal Experiment and Analysis of Needle-Punching Machine." Advanced Materials Research 605-607 (December 2012): 1257–60. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.1257.

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Modal analysis is a main method of researching the dynamic performance of the system structure. The deformation of Needle-punching machine frames in the work will affect the whole machine performance, which would seriously influence acupuncture frequency, reduce production efficiency. At the meantime, machine life will be shortened. Here, Needle-punching machine modal experiment has been done, the static natural frequencies and modal deformation animation of frame also has been calculated, that provides a reliable guide and basis for the actual work of deformation for needle-punching machine.

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2

Guo, Yi, Zhi Qiang Li, and Jin Chao Shi. "A Hole-Punching System for the Pot-Seedling Hole-Punching Machine." Applied Mechanics and Materials 380-384 (August 2013): 160–63. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.160.

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[Purpos in order to solve design problems of the hole-punching system for the pot-seedling hole-punching machine, a system featuring reliable operation, simple structure and stable performance has been designed in accordance with working requirements. [Metho MATLAB is used for accurate calculation of the cam profile, with the calculated results imported to SolidWorks to produce cam profile curves. Such curves are then modified according to working requirements, thereby to build a 3D model for the cam mechanism. Finally, a 3D model for the complete hole-punching system is built with SolidWorks. [Result The hole-punching system designed herein is applied to the pot-seedling hole-punching machine and after performance test has proven to be able to meet working requirements and work reliably. [Conclusion The design of this system can provide theoretical basis and reference for related research.

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3

Chen, J. P. "Fault Diagnosis Model for Hydraulic Punching Machine." Materials Science Forum 626-627 (August 2009): 523–28. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.523.

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A modeling method termed as the discrete time hybrid Diagnosis (DTHD) is presented to constructure models for a hydraulic punching machine. The DTHD method is an extension of the works on FDD (the fault detection and diagnosis) which are based on FSM-based modeling. FDD of DTHD models are suited for real time systems because of their capability of detecting faults leading to failures in terms of erroneous delays and deadlines. The occurrences of faults or failures are represented for individual system components by categorizing the set of states of each individual system component model into normal or failed conditions of various types. The condition corresponding to the states (of a component model) are represented by an unmeasurable variable. The components are then composed to produce the overall representation of failures on the whole system model with a single unmeasurable variable.

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4

Makaryants, Georgy M., Andrey B. Prokofiev, and Evgeny V. Shakhmatov. "Vibroacoustics Analysis of Punching Machine Hydraulic Piping." Procedia Engineering 106 (2015): 17–26. http://dx.doi.org/10.1016/j.proeng.2015.06.004.

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5

Tripathi, Premshanker R. "Automation by CAM in Punching Press Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. 5 (May 31, 2021): 1569–74. http://dx.doi.org/10.22214/ijraset.2021.34605.

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6

Wang, Li Hua, and Xiao Qiang Wu. "The Design of Control System of Piston Pin Punching Recess Automatic Drilling Dedicated Machine Tool." Applied Mechanics and Materials 651-653 (September 2014): 895–98. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.895.

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The piston pin punching recess automatic drilling machine tool, is a dedicated machine tool designed and manufactured to solve the possess of piston pin punching recess. This paper studies the design of the dedicated machine’s control system, which uses open CNC technology, hydraulic technology, PLC technology, electrical technology, and human-machine interface technology. The control system can achieve the automation of feeding and blanking process. Replace of control panel, adopting touch screen to achieve operational control, and monitor the status of real-time job on the machine.

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7

Rui, Li Niu, and Peng Qu Quan. "PLC-Based Stamp Puncher." Applied Mechanics and Materials 470 (December 2013): 689–92. http://dx.doi.org/10.4028/www.scientific.net/amm.470.689.

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In order to facilitate the Notes user, this paper describes a bill automatic punching machine control system as a design core of PLC.And it introduces the working principle in detail and the main technical parameters of the control system .Meanwhile the thesis illustrates the design process of bill automatic punching machine control system from two aspects of hardware and software.

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8

Kang, Chang Lin, Bin Yao, and Dong Sheng Zhang. "A Technology of CNC Punching of Chinese Characters." Applied Mechanics and Materials 321-324 (June 2013): 1831–35. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.1831.

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The punching process with CNC is getting more and more important in the modern metal stamping field. But it is still difficult to realize NC punching the Chinese characters in manufacturing. Furthermore, it is expensive for processing forms of Chinese characters like thread cutting, laser cutting, etc. In addition, the ability to process the characters in a large size is restricted by the efficiency and the size of the machine. Therefore, this paper shows the details about programmable automation which is used in the characters processing on CNC punching machine. The content includes: getting the font parameter of character from DXF file, building the curve function for contour of characters, and creating G code for NC punching process. This technic provides a new method on processing big-size Chinese characters. And this technology can improve the efficiency and precision, and reduce the distortion of contour gotten by traditional program.

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9

G, Veeresha. "Design and Fabrication of Cost-Effective Agriculture Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (September 30, 2021): 284–88. http://dx.doi.org/10.22214/ijraset.2021.37942.

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Abstract: Mulching has long been used to conserve soil moisture, manage weeds, modify soil temperature, and create a microclimate for plants. There are a variety of strategies for improving crop growing conditions, including increasing productivity and reducing the amount of water necessary to grow the crops. However, mulching paper, also known as agricultural film, is one of the most effective ways to cover the soil and keep the crop in the right environment This mulching paper comes in a varietyof varieties, but because plastic mulching is well-known for requiring less effort, we've chosen to work on an automatic mulching paper laying machine that also includes a drip laying attachment. Moisture in the soil is critical for crop survival in arid environments. Mulching with plastic paper film around theroot area of plants prevents weed growth while also storing water and preventing soil dehydration, however this method takes a lot of money and time. So the 'Mulching paper laying machine with hole punching' will save money and time because it will handle both chores at once, laying mulching paper and punching holes in the ground. A body, a mainframe with hoeing blades, hole punching wheels, drip role holder, and punching mechanism make up the plastic mulch laying machine. The mulch was laid on the prepared plantation bed by the machine in conjunction with the drip pipe. This will lay mulch onthe bed without destroying it, as well as punch the holes to the desired dimensions. The product might be used in agriculture to grow tomatoes, watermelons, muskmelons, and other hybrid varieties of crops. Bylowering the capital cost and time of laying the mulching paper using the most convenient way, as well as installing the drip irrigation pipe in one pass of the machine, it will be simple for the farmer. (Key words: agriculture, mulching paper, weed control)

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10

Youssef, Mohamad EL, AbdelKader Benabou, Thierry Coorevits, Adrien Van Gorp, Stéphane Clenet, Pierre Faverolle, Jean-Claude Mipo, Yannick Lavalley, and Thomas Lecuppe. "Punching effect directly on electrical machine stator strips." International Journal of Applied Electromagnetics and Mechanics 61 (July 24, 2019): S107—S114. http://dx.doi.org/10.3233/jae-191291.

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11

Ye, Yunyue. "New punching machine driven by linear induction motor." Chinese Journal of Mechanical Engineering (English Edition) 13, no. 03 (2000): 224. http://dx.doi.org/10.3901/cjme.2000.03.224.

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12

Sun, Dong. "Adaptive Coupling Control of Two Working Operations in CNC Integrated Machines*." Journal of Dynamic Systems, Measurement, and Control 125, no. 4 (December 1, 2003): 662–65. http://dx.doi.org/10.1115/1.1636779.

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To reduce work in progress in the plastic industry, integrated CNC punching and cutting machines have been used recently to combine a number of individual operations into one operation. Application of such integrated machines is confronted with a challenging problem of synchronizing two-axis motions. In this paper, an adaptive coupling controller is utilized to synchronize punching and cutting operations of the integrated CNC machine. The controller incorporates cross-coupling technology into adaptive control design, through feedback of position errors of two motion axes and the differential position error between two axes. It has been shown that the proposed controller guarantees asymptotic convergence to zero of both position errors and the synchronization error. Implementation of this new controller in real-time operations of commercial integrated CNC machines, highlights advantages of the proposed approach.

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13

Tang, Jing Jing, Wei Zhong Wu, and Hai Xiang Dong. "Research on Punching and Hot-Pressing Process and Related Mechanism for Easy Tear Lid." Advanced Materials Research 490-495 (March 2012): 2848–52. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.2848.

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In traditional processing technology for easy tear lid, punching and hot-pressing are separated. They are finished by different mechanisms. There are some producing problems because of separated processing stages. In order to solve the problems, an innovated processing technology and the related mechanism for easy tear lid's forming are proposed in this paper. The new processing technology combines punching with hot-pressing; it can raise the rate of production. The related mechanism not only assures the accuracy of the lid’s forming, but also simplifies the structure of forming machine, making overall arrangement of machine become more reasonable.

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14

Sutton, P. A., O. Clifford, and T. R. C. Davis. "A New Mechanism of Injury for Scaphoid Fractures: ‘Test Your Strength’ Punch-Bag Machines." Journal of Hand Surgery (European Volume) 35, no. 5 (June 2010): 419–20. http://dx.doi.org/10.1177/1753193409352713.

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We investigated the mechanism of injury in a consecutive series of 153 confirmed scaphoid fractures. We found that ten (6%) occurred as a result of using a ‘test your strength’ punch-bag machine, a device found in public houses and amusement arcades. Clinicians should be aware that scaphoid fractures can occur as a result of punching these machines or other similar objects.

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15

Jaysrichai, Tossaphon, Kachonsak Srikongphan, and Pornchalit Jurarakpong. "A Development Machine for Measuring the Precision and the Response Time of Punches." Open Biomedical Engineering Journal 13, no. 1 (December 31, 2019): 151–57. http://dx.doi.org/10.2174/1874120701913010151.

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Objective: To develop and evaluate the device for measuring precision (in percentage) and response time (in seconds) of punches. Methods: Researchers cooperated with Sports Authority of Thailand and the Amateur Boxing Association of Thailand in development. Results: Robo-Boxing Trainer machine consisted of four targets. Each punching target has eight sensors and eight LED lights. Operating software, which programmed by PLC-CX programmer and DOPSoft (delta), can set the punching series and alarm signals. It recorded the response time from the starting signal to making contact with the target, calculating precision in percentage. This software could be set and recorded maximal 40 series and maximal 100 punches in each punching series. Researchers compared the accuracy of counting time with Digital Oscilloscope and tested the efficiency of sensors’ cutting signal. This study found the counting time to be of high accuracy (100% and 98.8%). The cutting sensors' signal test found to be efficient. Conclusion: Robo-Boxing Trainer machine, which is high in accuracy, may help to test and improve a boxer’s skills. Also, it can apply to train for other related sports.

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16

Chang, De Gong, Guang Zhen Zhou, Hong Yun Dou, and C. C. Wang. "Virtual Prototype Analysis for the Manipulator of Punching Machine." Key Engineering Materials 561 (July 2013): 609–13. http://dx.doi.org/10.4028/www.scientific.net/kem.561.609.

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In this paper, the 3D model was built by the software Pro/E. Virtual Prototype analysis for the manipulator of punching machine was carried out by the software ADAMS. The force, torque and angular velocity were calculated respectively under the step5 driving function condition. Through analysis and comparison, the result shows that the working condition was better when the step5 function was applied. This laid the foundation of the manipulator driving programming.

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17

Xie, Jun Hui, and Jian Chang Yuan. "Vibration Analysis of Needle-Punching Machine Slider-Crank Mechanism." Applied Mechanics and Materials 215-216 (November 2012): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.730.

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After analysis of the movement characteristics of needle-punching machine slider-crank mechanism in theory, a slider-crank mechanism acceleration curve had been rendered by MATLAB software and acceleration movement curve had been drawn after the measurement of acceleration of slider-crank mechanism by ADAMS simulation software. Through the comparison between the two results, a conclusion had been drawn. Finally, 3 advice of minishing vibration had been given according to the conclusion of calculation of acceleration by Quality Substitution Method,the first advice is the quality and site of the balance block are chose appropriately,the second advice is the weight of the slider and the connecting rod need to be reduced by choosing appropriate material.

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18

., Pratik D. Tak. "POKA YOKE IMPLIMENTATION ON PUNCHING MACHINE: A CASE STUDY." International Journal of Research in Engineering and Technology 04, no. 02 (February 25, 2015): 98–106. http://dx.doi.org/10.15623/ijret.2015.0402014.

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19

Cho, Hyun-Seob, and In-Ho Ryu. "Development of Inverter Control System for Speed Control Punching Machine." Journal of the Korea Academia-Industrial cooperation Society 9, no. 3 (June 30, 2008): 628–31. http://dx.doi.org/10.5762/kais.2008.9.3.628.

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20

Rao, Jun. "Punching Machine Driver Research Based on Pulse Electromagnetic Force Actuator." Applied Mechanics and Materials 416-417 (September 2013): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.78.

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Punch variety of drives, hydraulic, motor type is also commonly used. Conventional press drives both in terms of simplicity of the structure also in terms of effectiveness of control are present many problems. As is a background on the background of press drive innovative design, research on pulsed electric-magnetic field driven punch. Thanks to electro-magnetic direct drive, the system structure is simple, convenient control flexible, changing the timing and amplitude of excitation pulse, can change the speed and direction of movement of permanent magnet ring and have the output force of significant features. From the design on the effect of pulse electromagnetic drive punch, its index relative to the mechanical structure has improved, such as stamping frequencies up to 300 times/min, noise less than 80dB, volume reduction of cent, reduce the weight of 60%. This structure can greatly improve the working speed of the punch, while simplifying punch drive mechanical structure.

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21

Alaneme, K. K., B. O. Adewuyi, and F. A. Ofoegbu. "Failure analysis of mould dies of an industrial punching machine." Engineering Failure Analysis 16, no. 7 (October 2009): 2043–46. http://dx.doi.org/10.1016/j.engfailanal.2009.01.006.

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22

Li, Cheng Qun, and Yu Long Wu. "Production Research of PLC-Based Disc Motor Punching-Winding Machine." Advanced Materials Research 490-495 (March 2012): 1680–84. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1680.

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Disc motor is a kind of motor which have a short axial dimensions and large start torque, it is widely used in machinery and equipment. Production quality of the motor stator and rotor determine the disc motor's performance .The motor stator and rotor which is produced by the method of punching-winding combined, have a high precision of motor underline slot and the motor performances good. Apply the PLC control system on the stator and rotor production, have a high degree of intelligence, easy to operate, realized the automation of the stator and rotor production and increased the productivity.

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23

Sathish, T., N. Sabarirajan, and S. Karthick. "Analysis and design of smart paper punching machine for spiral binding." Materials Today: Proceedings 33 (2020): 2564–66. http://dx.doi.org/10.1016/j.matpr.2019.12.105.

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24

P, NAGAPRAKASH, C. MATHALAI SUNDARAM, A. VENNIMALAI RAJAN, J. CHAKRAVARTHY SAMY, and DURAI A. Vembathu Rajesh. "Design and Fabrication of Computerized Numerical Control Based Pneumatic Punching Machine." INTERNATIONAL JOURNAL OF RECENT TRENDS IN ENGINEERING & RESEARCH 05, no. 06 (June 30, 2019): 11–16. http://dx.doi.org/10.23883/ijrter.2019.5056.fbzhb.

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25

Cheng, Jun Hong, Mu Liang, and Dong Kai Liang. "Punching Process and Technical Equipment of High-Density Sub-Mesh Plate." Advanced Materials Research 468-471 (February 2012): 2732–35. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.2732.

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According to the problems in the process of high-density mesh plate that mesh holes of plate is too density and the device screw bar is not long enough for the original equipment, a set process is used to overcome the problems of lying out and fixing for punchers. A simple special tool is designed. Fixed and slide ruler mechanisms are installed in the original machine. Repeat-orientation and several division methods are used, and the stroke of the original machine is increased two times, which successfully solves the processing problems and creates good economic benefits.

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26

Özdilli, Özgür. "Design and manufacture of automatic plastic valve welding machine." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 235, no. 4 (January 27, 2021): 1017–26. http://dx.doi.org/10.1177/0954408920988214.

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Plastic welding method is a widely used technology for the welding of pressure and vacuum bags using plastic valves. Conducting this process with traditional methods creates disadvantages in terms of production speed, product quality and economical aspects. Today, assembly costs make up the majority of total production costs, manufacturers pay more attention to assembly automation and work in this direction in order to reduce costs, speed up the production process and increase efficiency. In this study, it is aimed to design and manufacture a single Automatic Valve Welding Machine that can do all of these operations and integrated automation system instead of cutting, punching and plastic welding process that can be performed with multiple machines and workers. In this context, a new automated machine was designed in 3 D, and engineering analyzes were carried out to manufacture a prototype. In design, the machine has been made suitable for developing technology by using PLC (Programming Logic Controller) and pneumatic system. In addition, static analyzes of the machine were made. With the inclusion of a production-specific automatic controlled plastic welding machine, manufacturing can be done faster, with higher quality, lower costs and less wastage compared to the traditional manufacturing process.

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27

Kumala Sriwana, Iphov, and Nadya Syauqillah. "Analysis of Overall Effectiveness on Hall Separator Punching Machine at PT. DNIA." IOP Conference Series: Materials Science and Engineering 847 (May 28, 2020): 012035. http://dx.doi.org/10.1088/1757-899x/847/1/012035.

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28

Ji-li, Wang, Yang Zhao-jun, Chen Fei, Li Guo-fa, and Chen Chuan-hai. "Minimum Effort Reliability Allocation Method Considering Fuzzy Cost of Punching Machine Tools." Journal of Applied Sciences 13, no. 20 (October 1, 2013): 4107–13. http://dx.doi.org/10.3923/jas.2013.4107.4113.

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29

Lü, Xiao Lian, Meng Zang, Xiao Rong Lü, and Wei Ming Wu. "Design of the Plant Spacing Adjustable Dibbler." Applied Mechanics and Materials 574 (July 2014): 239–42. http://dx.doi.org/10.4028/www.scientific.net/amm.574.239.

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According to the problems that caving device of the mulching film and punching planter that hard to adjust the plant distance problem and the low frequency of use at present, the plant spacing adjustable dibbler was designed for continuously adjustable planting distance of the caving device. The adjustable dibbler can be realize continuous adjustable of plant spacing in certain range, when the planter was working. It is to achieve the aim of a machine used several purposes, expand the scope of use, and improve the frequency of use. By the UGNX virtual prototyping technology, completed the design of the overall structure of the adjustable dibbler. The study provides reference for the design and development of the mulching film and punching planter.

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30

Liu, Si Yu, Pei Feng, and Chong Chang Yang. "The Study Based on LABVIEW of the Positioning Accuracy of Spinneret Microporous Fine Machine." Advanced Materials Research 712-715 (June 2013): 1347–50. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1347.

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The microporous on spinneret has the characteristics of high precision, small pore size and large quantity. Spinneret microporous finishing operation is mainly used for removing the burr formed on the spinneret silk surface after micropores drilling and punching. The burrs seriously affect the quality of the spinning fibers. Micropore spinneret finishing plays a vital role in improving the quality of processing micropore. This paper introduces a system consisting of the spinneret micropore fine machine,then focuses on fine machine positioning system and proposes a high-precision positioning method of the microporous.

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31

Hakim, Luqman Abdul, and Rino Andias Anugraha. "Perancangan Sistem Otomasi Untuk Kartu Tekstil Jacquard Pada Mesin Punching Untuk Di PT Buana Intan Gemilang." Jurnal Rekayasa Sistem & Industri (JRSI) 4, no. 01 (July 19, 2017): 68. http://dx.doi.org/10.25124/jrsi.v4i01.249.

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Indonesia’s textile industry has been successfully being the fifth ranked textile product exporter country by contributed Gross Domestic Bruto (GDP) which is 9% in non-oil industry. As the rapid development of technology, its encouraging textile industry to be able to implement it into the production process, its automation system regarding can improve the productivity. PT. Buana Intan Gemilang is one of textile industry which manufactures greige, sajadah, and curtains fabric within various pattern. Increasing demand regarding pattern therefore company should intensify productivity of machine, operator, and system in order to produce pattern card called jacquard card in thousand amounts. The Problem statement which showed is the manufacturing process is still manual rely on recur the operator’s activities, inconsistent cycle time that occurs on incapacity production target. Automation system design on punching machine using a Programmable Logic Controller (PLC) as the primary controller with using User Requirement Spesification (URS) for providing the solution in designing automated system implemented to solve the problem. According to conducted research it can be conclude that, automation system design for jacquard on punching machine at PT.Buana Intan Gemilang has been accomplished and decrease the cycle time around 10 seconds/card. By using automation system on jacquard card production is expected to increase the production capacity and eliminate the workload of operator therefore offer benefit and productivity of company.

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32

Hu, Si Qian, Hai Ping Wang, Yu Min Zhang, and Xin Zou. "Polytetrafluoroethylene Mesh for Many Types of Blueprinting Machine: Preparation and Characterization." Advanced Materials Research 317-319 (August 2011): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.48.

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Adopting domestic polytetrafluoroethylene (PTFE) turning plate as materials, a new isosceles triangle macroporous mesh was designed. The correspond mould and the special fixtures for continuous punching of ultra-thin plastic sheet were successfully developed. The PTFE mesh was manufactured through computer numerically controlled (CNC) punch. In terms of electronic universal testing machines and microcomputer differential thermal balance, mechanical properties and thermostability of the PTFE mesh were studied. The results indicated that the tensile strength of PTFE mesh is 11.98 MPa which is greater than the literature value of 7.77 MPa, and its heat-resisting performance is excellent without decomposition prior to 312 oC.

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33

Moreno, Aitor, Gorka Velez, Aitor Ardanza, Iñigo Barandiaran, Álvaro Ruíz de Infante, and Raúl Chopitea. "Virtualisation process of a sheet metal punching machine within the Industry 4.0 vision." International Journal on Interactive Design and Manufacturing (IJIDeM) 11, no. 2 (June 6, 2016): 365–73. http://dx.doi.org/10.1007/s12008-016-0319-2.

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34

Wetzig, Andreas, Jan Hauptmann, Patrick Herwig, Eckhard Beyer, Wieland Bundschuh, Simon Volk, and Mark Hemberger. "Inline High Speed Laser Cutting of Band Material." Materials Science Forum 854 (May 2016): 237–42. http://dx.doi.org/10.4028/www.scientific.net/msf.854.237.

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Laser cutting is introduced as an alternative technique to manufacture typical metallic punching and bending parts. Assets and drawbacks of high speed laser cutting technologies like Remote Laser Cutting and laser fusion cutting by means of a high dynamic form cutter are discussed. Finally, the concept of the world´s first industrial inline reel to reel laser cutting machine for metal strips is presented.

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35

Zheng, Hong, Guo Rui Wu, and Wei Hua Xu. "Study on Machinery Manufacturing CAD/CAM NC Machining Technology." Advanced Materials Research 875-877 (February 2014): 983–87. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.983.

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With the development of computer technology, CAD / CAM technologies have been widely used in the machinery manufacturing industry. They have brought fundamental changes to product design and manufacturing method. Based on the characteristics of punching machine processing technology, the main content of this paper is the study on boards CAM key technology taking NC machining applications for boards punching as the background. This study takes VC + + software as the platform and widely applies VC + + development tools and OpenGL technology in the process of developing graphical simulation system. The purpose of this study is to achieve drawing function, automatically extract pixels in AutoCAD graph such as holes, and automatically generate NC machining program by the extracted pixels on the basis of the pixel extraction. This can ensure the uniqueness and accuracy of the data, so as to improve the efficiency of programming.

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36

Javed, M., S. Hemington-Gorse, and K. Shokrollahi. "A new recreational mechanism for the boxer’s knuckle: cause for concern?" Annals of The Royal College of Surgeons of England 93, no. 5 (July 2011): e55-e56. http://dx.doi.org/10.1308/147870811x583250.

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Traumatic injuries of the metacarpophalangeal joints are a common occurrence in professional and recreational sports such as boxing and martial arts, especially the fourth and fifth metacarpals. Injury usually results from a forceful impact with a clenched fist. The spectrum of injuries varies from simple skin laceration to extensor mechanism disruption, dorsal capsule rupture, metacarpal fractures and carpometacarpal joint injuries. These injuries are well documented in boxers as well as in patients who had been involved in fights and assaults. We report on two patients sustaining similar injuries to the dorsum of the hand but following punching of a recreational ’punching machine’. We describe the patterns of injury encountered and summarise the treatment. For clinical and safety reasons as well as the potential medicolegal implications, we believe it is important to highlight this mechanism of injury.

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Feng, Pei, Si Yu Liu, and Chong Chang Yang. "The Study of the Development of the Spinneret Automatic Fine Machine Based on Properties of Mechanical Materials." Applied Mechanics and Materials 327 (June 2013): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.327.333.

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Spinneret automatic fine machine uses the host computer to control machinery to accurately punch pear-shaped needle into each micropores on the spinneret. It can not only remove the burrs formed in the production process of the spinneret, better able to make each of the microporous achieve the required size and dense material properties by punching. It can replace manual operation, improve the finishing efficiency and precision and have solved many defects in manual finishing operation. This paper focuses on the hardware and operating system of the spinneret finishing machine, also tests and verifies various parameters.

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Shah, Sahas Bikram, Paavo Rasilo, Anouar Belahcen, and Antero Arkkio. "Modeling of Losses Due to Inter-Laminar Short-Circuit Currents in Lamination Stacks." Electrical, Control and Communication Engineering 3, no. 1 (August 1, 2013): 31–36. http://dx.doi.org/10.2478/ecce-2013-0012.

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Abstract The cores of electrical machines are generally punched and laminated to reduce the eddy current losses. These manufacturing processes such as punching and cutting deform the electrical sheets and deteriorate its magnetic properties. Burrs are formed due to plastic deformation of electrical sheets. Burr formed due to punching on the edges of laminated sheets impairs the insulation of adjacent sheet and make random galvanic contacts during the pressing of stacked sheets. The effect of circulating current occurs if the burrs occur on the opposite edges of the stacks of laminated sheets and incase of bolted or wielded sheets, induced current return through it. This induced current causes the additional losses in electrical machine. The existence of surface current on the boundary between two insulated regions causes discontinuity of tangential component of magnetic field. Hence, based on this principle, the boundary layer model was developed to study the additional losses due to galvanic contacts formed by burred edges. The boundary layer model was then coupled with 2-D finite element vector potential formulation and compared with fine mesh layer model. Fine mesh layer model consists of finely space discretized 950028 second order triangular elements. The losses were computed from two models and were obtained similar at 50 Hz. The developed boundary layer model can be further used in electrical machines to study additional losses due to galvanic contacts at the edges of stator cores.

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Anisimov, Alexander V., and Feliks Ya Rudik. "Results of Theoretical Definition of Structural and Kinematic Parameters of Peeling Machine Working Elements." Engineering Technologies and Systems 30, no. 4 (December 30, 2020): 594–608. http://dx.doi.org/10.15507/2658-4123.030.202004.594-608.

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Introduction. Peeling the moistened grains before grinding allows removing most of the outer shells with impurities on them from the grain surface. At the present time, the most commonly used machines for peeling are devices operating on the principle of “compression and friction”, in which the grains move along the friction surfaces of the working bodies. The aim of this study is to define and select structural and kinematic parameters of the machine working bodies, which would most effectively perform the process of peeling, and to make energy assessment of grain peeling. Materials and Methods. To identify the dependence of the machine design and operating parameters on the inclination angle and punching angle of the sieve cylinder, a diagram of the movement of the grain along the inclined cylinder was drawn up using elements of the theory of the motion of material point on rough surfaces. The motion of grains on the cylinder surface is analyzed by the methods of analytical dynamics. Results. The values of the geometric parameters of the particle position at point A are expressed as a function of the cylinder inclination angle α and the angle characterizing the shape of the inclined line of stamping of the cylinder β. Energy assessment of grain peeling process was made. With the radius of the sieve cylinder R0 = 0.135 m, the width of the working annular gap к = 0.01 m, the length of the cylinder L = 0.4 m, the horizontal arrangement of the cylinder, the angular velocity of the shaft ω = 90 rad/s, the angle of inclination of the stamping β = 22º, the calculated power was P = 4.5 kW. Discussion and Conclusion. As a result of analyzing the motion trajectory of the grain located on the cylinder surface, there have been proposed the formulas relating the shape of the inclined punching line of the cylinder, characterized by the angle β, to the inclination angle α, the radius R0 of the cylinder, the shaft angular velocity and the grain frictional properties. The obtained analytical dependencies can be used for the approximate definition of the peeling machine design and kinematic parameters.

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Zhao, Rongli, Sujuan Wang, Xin Chen, Ziqiang Yin, Jiewu Leng, and Xiafeng Zhang. "Development of a micro punching machine tool for micro lens array on steel mold." International Journal of Advanced Manufacturing Technology 106, no. 9-10 (January 15, 2020): 4307–20. http://dx.doi.org/10.1007/s00170-019-04809-5.

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Selvi, Lukman, Endra Joelianto, and Edi Leksono. "Time Optimization Analysis Using Hybrid Simulated Annealing and Genetics Algorithm For CNC Punching Machine." Journal of Physics: Conference Series 1230 (July 2019): 012089. http://dx.doi.org/10.1088/1742-6596/1230/1/012089.

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Ashwin, Das. "Low Cost Automated Hammering Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 20, 2021): 1514–17. http://dx.doi.org/10.22214/ijraset.2021.34854.

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This Project focus on cad modeling, design, and fabrication of the automatic hammering machine. Our primary goal for this is to design is to eliminate man power and utilize electrical energy for automatic hammering machine. Besides, we tend to obtain the maximum torque by minimizing the r.p.m. of gear which a result it can also control the impact velocity for hammering torque force as per required design of gear and r.p.m., In our project, we are using torque force to perform various manufacturing operations in industries like riveting, upset forging, punching, etc. Also, the time required for operation is less so it is useful in mass production. In this project, we have devised a solid model of project assembly by using Solid works Software. The model consists of a motor, shaft, hammer, spring, pulley, mechanical counter. From this, we erect a conceptual model of an automatic hammering machine. As this s operation is repetitive much more human effort is required which drains energy as well as time. By keeping in mind these parameters, a worker can use this machine to increase productivity. Moreover, if a handicapped person if willing to perform such operation can perform this operation with ease. It is simple in construction and compact in design highly qualified workers are not required. There are various benefits that when industry views while using automated systems. These benefits can be very helpful in the long period. It can be the best and long-lasting product.

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Lin, Jia Horng, An Pang Chen, Jan Yi Lin, Ting An Lin, and Ching Wen Lou. "Manufacturing Technique and Physical Properties of Environment-Protective Composite Nonwoven Fabrics." Advanced Materials Research 287-290 (July 2011): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.154.

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Rapid technical advancement threatens the earth ecology, driving people by degrees to develop green energy and green products. Tencel® fiber uses natural fibers. Products made of Tencel® fiber could be biodegraded, which solves the problems for the increasing consumptions of disposable nonwoven product. In this research, Tencel® fiber, polylactic acid (PLA) fiber, and high absorbent fiber (HAF) were used to produce Tencel®/PLA/HAF composite nonwoven fabrics. Among the nonwoven processing parameters, to increase the Tencel® fiber content helped heighten the water absorbency. When there were 80 wt% Tencel® fibers, the basis weight was 100 g/m2 and the needle-punching density was 300 needle/cm2, the Tencel®/PLA/HAF composite nonwoven fabric exhibited the optimum water absorbency in cross machine direction (CD), which was 5.0 cm. The air permeability of the Tencel®/PLA/HAF composite nonwoven fabrics reached 164.4 cm3/cm2/s when the basis weight was 100 g/m2 and the needle-punching density was 300 needle/cm2

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Li, Jia-Hsun, Ching-Wen Lou, Jing-Chzi Hsieh, and Jia-Horng Lin. "Using unwrapped filament tows to strengthen sandwich composites: Puncture and bursting resistance." Journal of Industrial Textiles 49, no. 10 (December 8, 2018): 1374–88. http://dx.doi.org/10.1177/1528083718817553.

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The combination of appropriate materials and structural design can compensate for flaw of a single pattern, providing the products with better functionalities. In this study, the custom-made nonwoven fabric machine can unwrap the filament tows before needle punching stage. Sandwich composites are proposed, consisting of two nonwoven fabrics as surface layers and laminated loops of filaments as the core. The puncture resistance of the sandwich composites are examined in terms of weight of filament loops and needle-punching depth, examining their influences. The employment of filaments has a remarkable influence on the mechanical performance of the composites. GF4G has static puncture resistance, dynamic puncture resistance, and bursting strength that are 89%, 30%, 88% higher than those of GF1G; 332%, 127%, and 500% higher than those of 2G; and 671%, 400%, and 1260% higher than those of G. Using filaments to reinforce nonwoven fabrics only requires simple equipment and easy operation. Furthermore, based on the requirements of different final products, diverse filaments and multiple parameters can be combined, thereby providing the composites with efficient production, solid reinforcement, and broad applications.

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Wojtkowiak, Dominik, Krzysztof Talaśka, Ireneusz Malujda, and Grzegorz Domek. "Analysis of the influence of the cutting edge geometry on parameters of the perforation process for conveyor and transmission belts." MATEC Web of Conferences 157 (2018): 01022. http://dx.doi.org/10.1051/matecconf/201815701022.

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Perforated belts, which are used in vacuum conveyor belts, can have significantly different mechanical properties like strength and elasticity due to a variety of used materials and can have different thickness from very thin (0,7 mm) to thick belts (6 mm). In order to design a complex machine for mechanical perforation, which can perforate whole range of belts, it is necessary to research the influence of the cutting edge geometry on the parameters of the perforation process. Three most important parameters, which describe the perforation process are the cutting force, the velocity and the temperature of the piercing punch. The results presented in this paper consider two different types of punching (a piercing punch with the punching die or with the reducer plate) and different cutting edge directions, angles, diameters and material properties. Test were made for different groups of composites belts – with polyurethane and polyester fabric, polyamide core or aramid-fibre reinforced polymers. The main goal of this research is to specify effective tools and parameters of the perforation process for each group of composites belts.

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Vu, Duy-Thang, and Nhat-Duc Hoang. "Punching shear capacity estimation of FRP-reinforced concrete slabs using a hybrid machine learning approach." Structure and Infrastructure Engineering 12, no. 9 (September 30, 2015): 1153–61. http://dx.doi.org/10.1080/15732479.2015.1086386.

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Mangalathu, Sujith, Hanbyeol Shin, Eunsoo Choi, and Jong-Su Jeon. "Explainable machine learning models for punching shear strength estimation of flat slabs without transverse reinforcement." Journal of Building Engineering 39 (July 2021): 102300. http://dx.doi.org/10.1016/j.jobe.2021.102300.

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Yang, Xiaolong, Shining Zhou, Zuyuan Yu, Jianzhong Li, Zhijie Zeng, Yingjie Xing, and Xin Liu. "WITHDRAWN: Development of a new micro punching machine with micro male and female dies fabricated online." Precision Engineering 51 (January 2018): 762. http://dx.doi.org/10.1016/j.precisioneng.2016.08.002.

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Shtuts, Andrii, and Maxim Sluzalyuk. "RESEARCH OF PUNCHING PROCESSES BY PACKING WITH USE OF SURFACE HEATING OF PREPARATIONS." Vibrations in engineering and technology, no. 2(97) (August 27, 2020): 138–48. http://dx.doi.org/10.37128/2306-8744-2020-2-15.

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Despite the fact that stamping processes have been around for a relatively long time and have significant advantages compared to traditional approaches, as well as high technical and economic indicators, this process is not widespread. The machine-building industry needs mass production and use of sophisticated parts of various designs. The need of Ukraine for the details of such a design varies significantly and can reach tens of millions of pieces. The need for ring blanks of type flanges (gear) of the total amount is more than 50% [1]. According to foreign enterprises, when cutting, the material utilization ratio is 40-50%, and when using stamping, it is pumped through using surface heating of workpieces - 75-80% [5]. If we take into account the use of energy for the production of steel and its processing per unit weight of the finished part, then it is 70–84 MJ / kg when machined, and 41–49 MJ / kg for plastic deformation. To improve the ductility and deformability of the material, it is advisable to use induction plants for heating carbon steel preforms before pressure treatment. Two types of fundamentally different heating options are used: pass-through, when the workpiece warms up to its entire thickness with a temperature difference between the surface and the core of 50-100 °, and surface, when you need to heat only a relatively small layer of metal to a certain depth. Before stamping, wetting requires the use of surface induction heating, which provides greater surface plasticity of the workpiece material without changing its structure [3]. In this regard, surface and end-to-end inductive heating installations are widely used in stamping processes for wetting. The absence of theoretically justified parameters of the regime leads to the use in practice of induction heating of systems with unsuccessful design solutions and relatively low technical and economic indicators. Thus, there is a need for relevant research aimed at determining the rational parameters of the heating mode, providing on this basis effective processing of workpieces.

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JAMROZIAK, Krzysztof, Sebastian KOZIOŁEK, and Tadeusz SMOLNICKI. "ANALYSIS OF PUNCHING PROCESS OF BALLISTIC SHIELD WITH THE USE OF FINITE ELEMENT METHOD." Scientific Journal of the Military University of Land Forces 165, no. 3 (July 1, 2012): 289–302. http://dx.doi.org/10.5604/01.3001.0002.3501.

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In the article the results description of punching into the composite ballistic shield with the use of sub-machine gun and 9mm Parabellum was presented. On the prepared measurement position using high-speed cameras and laser-vibrometer the process parameters of the ballistic shield and bullet deformation were recorded. An analyzed ballistic shield was a layered composite made from plain aramid fabrics connected with oneself with neoprene matrix. Received results from experimental examinations served for building numerical models with the use of Finite Element Methods. Based on the numerical models the FEM analysis was conducted. The main goal of the simulation was FEM implementation as a validation tool for comparison with the experiment.

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