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Journal articles on the topic 'Mechanical press'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Ishiguro, Minoru, Kazuki Dan, Shin-ichiro Kaneko, Yotsumi Yoshii, Tomoki Tajiri, and Yoshinori Sakamoto. "Snow Consolidation Properties by using Mechanical Press Machine." Journal of the Institute of Industrial Applications Engineers 7, no. 3 (July 25, 2019): 83–90. http://dx.doi.org/10.12792/jiiae.7.83.

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2

Camossi, Roberto. "Mechanical low‐noise press." Journal of the Acoustical Society of America 93, no. 6 (June 1993): 3536–37. http://dx.doi.org/10.1121/1.405370.

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3

Li, Chang Long, Qing He, Zhi Gang Zhang, Qin He Zhang, and Jian Hua Zhang. "An Analysis of Unloading for Mechanical Press." Advanced Materials Research 569 (September 2012): 437–41. http://dx.doi.org/10.4028/www.scientific.net/amr.569.437.

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In order to analyze the advanced unloading problem of the large-scale press machine under nominal pressure, a straight side four point press of 8000kN has been taken for example. The model of the connector is constructed in Abaqus and the stiffness of the connector has been analyzed. The dynamic model of press machine impacting mechanism is constructed in ADAMS and the constraints is added into the model, meanwhile, the simulation model of the hydraulic protective system of the mechanical press is constructed in AMESim. Finally, the combined simulation of the hydraulic and mechanical system is realized, thus the actual stamping process of mechanical press is accurately simulated. The conclusion shows that the improper pre-pressure selection is the main reason for the unloading problem. And the correct pre-pressure value is obtained.

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4

Gao, Shiming, and Lothar Budde. "Mechanism of mechanical press joining." International Journal of Machine Tools and Manufacture 34, no. 5 (July 1994): 641–57. http://dx.doi.org/10.1016/0890-6955(94)90049-3.

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5

Wu, Guo Feng, Qian Lang, Bin Wang, Yi Fei Jiang, and Jun Wen Pu. "Chemical Modification of Poplar Wood on the Mechanical Properties." Advanced Materials Research 194-196 (February 2011): 1815–18. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1815.

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In this research, the chemical and multilayer hot-press drying was used to modify poplar wood. The timbers were compressed and dried in the multilayer hot-press drying kiln. The combination of chemical modification and hot-press drying can improve the mechanical properties. The influence of chemical and hot-press drying on the compressive strength parallel to grain, the bending strength, the density, the water absorbent and the crystallinity of poplar wood have been investigated in this study. The chemical treated conditions close to real technological regimes selected. The samples were impregnated with three conditions. The samples were dried in a hot-press drying kiln for 130hrs. It was showed that the urea carbamate and hot-press drying treatment increase the properties. The density and mechanical properties increased with increasing urea carbamate, while the water absorption decreased. The crystallinity is 37.03%, 37.11%, 37.78%, separately, compared with the natural wood of 35.09%. The TAG showed the thermal stability increased.

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6

Soong, Ren-Chung. "ON THE NEW MECHANICAL PRESS WITH A PLANETARY GEAR TRAIN." Transactions of the Canadian Society for Mechanical Engineering 40, no. 1 (March 2016): 45–58. http://dx.doi.org/10.1139/tcsme-2016-0004.

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A new 1-DOF mechanical press with a geared eight-bar linkage mechanism is presented. The proposed press can generate the required kinematic and dynamic performance for drawing, stamping, deep drawing, and precision cutting processes by simply adjusting the offset of the ram. The press consists of an elementary planetary gear train with a pair of planet gears, a slider-crank mechanism, and a slider-crank mechanism with a variable-length crank. The configuration and a solid model are described, and a kinematic analysis, dynamic analysis, and optimized dimensional synthesis of the press are discussed. Examples are provided to verify the feasibility and effectiveness of the design methodology. The proposed press could lead to more flexible and cost-effective applications.

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7

Song, Wei, Shuo Liu, Hongjun Pan, and Shiqiang Zhu. "Investigation on the design of hydraulic high-speed punching press with a large press force and a long press stroke." Advances in Mechanical Engineering 8, no. 12 (December 2016): 168781401668360. http://dx.doi.org/10.1177/1687814016683601.

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High-speed punching presses are widely applied in modern manufacture industry, especially in occasions of automatic production with a large or a super large quality. To obtain a better production efficiency and a wilder application in industries, it is meaningful to develop the high-speed punching presses with a large press force and a long press stroke. Considering the limitations of mechanical and servo high-speed punching presses, hydraulic technology is the most possible way to develop the high-speed punching press with a large press force and a long press stroke so far. This article has proposed a hydraulic operating principle based on the hydraulic vibration technology for the development of the high-speed punching press with a press force of 1250 kN, a press stroke of 50 mm, and a press velocity of 1000 hpm. With a simulation model built under the AMESim environment, performances of the system are obtained and analyzed. Then, parameter optimization is also carried out and discussed. Finally, the operating principle and the parameters are refined. The obtained results have proved that the design meets the aimed performances of the high-speed punching press.

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8

Poller, T., T. Basler, M. Hernes, S. D’Arco, and J. Lutz. "Mechanical analysis of press-pack IGBTs." Microelectronics Reliability 52, no. 9-10 (September 2012): 2397–402. http://dx.doi.org/10.1016/j.microrel.2012.06.079.

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9

Ge, Zheng Hao, Wen Jing Ma, Kai Kai Zhang, and Wei Huang. "Mechanism Design and Dynamic Analysis of Hybrid Cam-Linkage Mechanical Press." Key Engineering Materials 474-476 (April 2011): 803–6. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.803.

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This paper proposes a new structure of hybrid cam-linkage mechanical press. First of all, the design process is introduced and positive movement simulation is done separately for hybrid cam-linkage mechanism and hybrid seven-bar mechanism in Pro/Mechanism. Through comparing the curves of slider’s output displacement, velocity and acceleration, it comes to the conclusion that the slider of hybrid cam-linkage mechanical press has better output motion characteristics. Then power and torque distribution of servo motor and general motor of the hybrid cam-linkage mechanical press is studied in ADAMS based on the simulation results. At last, torque of general motor and servo motor in practical work is analyzed by taking cold extrusion press as an example.

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10

Yang, Han, and Xiang Hong Zhang. "Study on Intelligent Control System of Mechanical Press." Applied Mechanics and Materials 110-116 (October 2011): 3204–9. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3204.

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In view of digitized heavy-duty mechanical driving technology of alternating current servo machine from the connection between innovative and high technology and conventional mechanical technology, we regard it as the main drive of mechanical press machine, which can improve greatly the performance and intelligent level of press machine. The thesis studies the control system of servo spiral coining machine. We design the hardware of control system based on the scheme about “PC+moving controller”, take GT 200-SV moving controller as upper control unit, alternating current servo driver and special alternating current servo electrical machinery as actuating element to constitute full-closed loop control system. On the basis of it, we choose Visual C++ 6.0 as development tool on the software, adopt modularized and object-oriented design procedures to design control system software.

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11

Azpilgain, Zigor, R. Ortubay, A. Blanco, and Inaki Hurtado. "Servomechanical Press: A New Press Concept for Semisolid Forging." Solid State Phenomena 141-143 (July 2008): 261–66. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.261.

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Semisolid forging process requires special movement of the ram, until now only achievable with hydraulic presses. The upper die, placed on the press ram, must move fast during forming of the component in order to reduce segregation phenomena, and, once the part is shaped, the die must squeeze the material so that the contraction of the material is overcome and no shrinkage defects are formed. Traditional mechanical presses are not able to reproduce this kind of cycles, only possible with hydraulic presses. The introduction of servo motors in mechanical presses makes possible the achievement of those requirements, and, therefore, the use of these presses for the semisolid forging processes. The main characteristic of this type of machines is the elimination of the flywheel and the clutch; in the solution proposed by the press builder Fagor, the AC servo motor drives the ram of the press by using a transmission based on gears and a crank. This paper presents some of the results achieved during the semisolid forging of A356 aluminium alloy using a 400 tons Fagor servo motor driven mechanical press installed at the University of Mondragon.

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12

Knight, Earl W. "Recent Advances in Mechanical Dewatering of Digested Sludge." Water Science and Technology 21, no. 10-11 (October 1, 1989): 1441–46. http://dx.doi.org/10.2166/wst.1989.0340.

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The present sludge processing operations at the District consist of heated anaerobic digestion, dewatering by centrifugation, and air drying. A critical unit operation in the overall sludge processing train is the mechanical dewatering step. Typically, sludge dewatering by the District's existing centrifuges produces a cake having a solids content of 15%. Four different types of mechanical sludge dewatering machines were evaluated in a pilot test program to determine if these machines could produce cakes having greater solids contents than that produced from the existing centrifuges. The machines tested were two modified versions of the conventional horizontal solid bowl centrifuge design, a screw press, and a diaphragm filter press. The two modified centrifuges produced cakes having average solids contents of 20% and 29.4%, respectively; the screw press produced a cake having an average solids content of 17.5%, and the diaphragm filter press produced a cake having an average solids content of 29.4%. Based on the pilot test program, a test evaluation program was conducted using full-scale centrifuge machines of the modified designs. The preliminary results of this test program confirmed that centrifuges can produce a cake with a solids content approximately equal to or greater than 30%.

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13

Shang, Wan Feng. "Dynamic System of a Mechanical Press Driven by SRM for Flexible Process." Advanced Materials Research 625 (December 2012): 37–40. http://dx.doi.org/10.4028/www.scientific.net/amr.625.37.

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The paper presents a mechanical press driven by Switched Reluctance Motor (SRM) and researches on its tracking performance and operating noise. A position servo control system is proposed with a hybrid closed-loop structure to achieve flexible process of servo press. Based on the working bench, experiments are made to measure the tracking performance and operating noise of the press. Experimental results indicate the press driven by SRM has better tracking performance and lower working noise.

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14

Zhang, WW, XS Wang, ZR Wang, SJ Yuan, ZB He, G. Liu, and K. Dai. "Mechanical analysis on the cylinder-crown integrated hydraulic press with a hemispherical cylinder." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 3 (June 5, 2014): 407–16. http://dx.doi.org/10.1177/0954406214537800.

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As a new press, cylinder-crown integrated hydraulic press (CCIHP) is analyzed firstly in this paper. The hydraulic cylinder consists of a hemispherical shell, which also functions as a main proportion of press crown. Compared with the conventional hydraulic press which has a hydraulic cylinder mounted in the press crown, the structure and force distribution of CCIHP are significantly different. First, the section modulus of the hemispherical crown is much larger than that of the conventional rectangle crown because the hydraulic cylinder and press crown are manufactured into a solid part and have a higher geometry centroid. Therefore, the hemispherical crown has lower tensile bending stress and a higher safety factor from the strength point of view when the same bending moment is applied. Second, under the conditions of same value in terms of the allowable stress, internal pressure and internal radius, the wall thickness of hemispherical hydraulic cylinder could be much thinner than that of the conventional hydraulic cylinder. Both of the reasons mentioned above can result in a weight reduction of the press. Also, the cylinder and the press crown can be reinforced by each another, as a result, the material strength capacity is better utilized. As a prototype, the 6300 kN CCIHP with hemispherical hydraulic cylinder, which is the first one of this kind press designed and manufactured by Harbin Institute of Technology (HIT) is introduced in this paper. Finite element analysis for CCIHP has shown that both the stress and displacements on the press during the loading process are allowable, even if eccentric force is loaded. Finally the priority application range of CCIHP has also been proposed.

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15

Li, Shi Long, and Zhi Gang Hu. "Finite Element Analysis of Press Casing of Screw Press." Applied Mechanics and Materials 201-202 (October 2012): 513–16. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.513.

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The pressing chamber is the heart of the screw press, it forms the drainage barrel and has to contain the operating forces of the press. As press casing is an integral part of pressing chamber, the strength of the press casing ensures normal operation of the press. The mechanical models of pressing chamber of the ZX10 type press created in MATLAB 7.0 for linear programming, and the 3D model of the press casing created in UG NX4.0 software were imported into ANSYS 9.0 software and a linear static finite element analysis was performed. The visual deflection patterns the part experiences under "real world" loading conditions were obtained so as to complete the security check of strength.

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16

Fan, Suo, Jian Hua Mo, and Zong Qiang Wang. "The Application of Toggle Mechanical Press in Hot Forming of High Strength Steel." Advanced Materials Research 1063 (December 2014): 358–61. http://dx.doi.org/10.4028/www.scientific.net/amr.1063.358.

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This paper discusses mechanical digital servo press control system and operating characteristics and adaptability to the hot forming requirements of high strength steel using the toggle mechanical presses [1-4]. A servo motor drive control strategy is made to adapt the stamping process. This paper describes results acquired by applying toggle mechanical servo press developed by author to the hot forming of high strength steel [5-7].

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17

Osakada, K., K. Mori, T. Altan, and P. Groche. "Mechanical servo press technology for metal forming." CIRP Annals 60, no. 2 (2011): 651–72. http://dx.doi.org/10.1016/j.cirp.2011.05.007.

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18

Reddy, Dr Chanda V. "IOT Based Ambulatory Bag Mechanical Ventilator." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (August 31, 2021): 1435–39. http://dx.doi.org/10.22214/ijraset.2021.37526.

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Abstract: The IoT-based Ambu bag mechanical ventilator is a ventilator that automates the process of hand press mechanism using the rack and pinion mechanism. The circulatory motion of the rack is converted into linear motion which helps to press the Ambu bag. The proposed project works on three modes of operation that is child-adult and elder which is set wrt to the breaths per minute. There are two states of operation one normal state where the normal working is evidenced whereas the other operation mode is emergency where the buzzer is themed on in case of emergency. All the parameters are displayed on LCD and connected to the IoT cloud to communicate remotely in the end device Keywords: Ambulatory Bag, IoT network, Rack and Pinion mechanism, Manual resuscitator, mechanical ventilators

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19

Fiebig, Wieslaw, and Jakub Wrobel. "Use of mechanical resonance in impact machines." MATEC Web of Conferences 211 (2018): 17006. http://dx.doi.org/10.1051/matecconf/201821117006.

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An innovative method exploiting mechanical resonance in machines drive systems, especially useful in impact machines, has been developed. Accumulation of energy at resonance can be applied to the drive system in a similar way as flywheels in eccentric presses. Under resonance conditions, the total energy consumption of the oscillating mass is equal to the energy lost due the damping forces. Energy accumulated in the oscillator can be several times greater than the energy supplied continuously to the oscillator. The developed method can be used in many applications, especially in impacting machines. Finally, the energy demand of resonance punching press will be compared with the energy demand of eccentric press.

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20

Gao, Jun, Cheng Lin Zhang, Shu Xia Lin, and Li Qun Ruan. "Process Parameter Determination of AZ31B Sheet Forming under Mechanical Press." Applied Mechanics and Materials 229-231 (November 2012): 2493–96. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2493.

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At present, most studies on magnesium alloy sheet forming were carried under hydraulic press. In this paper, differential temperature forming of AZ31B magnesium alloy sheet under the J23-63 mechanical press were carried out. Through an orthogonal test about studying the influence of process parameters on AZ31B magnesium alloy sheet drawing, some conclusions were drawn, which are: the influence of drawing temperature on sheet forming is the biggest, then the drawing die clearance, and lubricant respectively; the optimal process parameters combination is drawing temperature of 310°C, 1.10t die clearance, and 8mm die radius in this test.

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21

Wang, Hai Ttao, Yi Hong Liu, Yong Wang, Hui Juan Chen, Yan Qiu, and Yi Wang Bao. "Mechanical Properties of Dental Porcelain Discs by Different Producing Methods." Key Engineering Materials 544 (March 2013): 271–75. http://dx.doi.org/10.4028/www.scientific.net/kem.544.271.

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The conventional method of producing porcelain standard disc specimens is based on the dental lab method for bilayer ceramic crowns, in order to reflect the clinical using condition. However heavy task is facing to the researchers, which is producing a large amount of the specimens efficiently. The press molding method is used to produce dental porcelain disc specimens in this study. Then, the basic mechanical properties of two groups of porcelain specimens were tested respectively, comparing with handmade and press molding method. The density was measured by Archimedes' method, the flexural strength was tested by biaxial bending test, and the hardness was checked by microhardness tester. The micro features of the specimens before and after bending test were observed under optical microscope and SEM. The results showed that there was no significant difference in the flexural strength, microhardness and density of porcelain discs made by two methods. Air pores were found in all specimens with size between 5-50 micrometers. The size and distribution of pores in the specimens by press molding method are more homogeneous than handmade method. Producing dental porcelain discs for laboratory testing specimens by press molding method was much easy than handmade method. Furthermore, the mechanical properties and microstructures of the specimens made by handmade method and press molding method were almost same.

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22

W.M, Nazri, Nur Sakinah M.T, and Jamalu K. "Mechanical and Physical Properties of Kelempayan (Neolamarckia Cadamba) Particleboard." International Journal of Engineering & Technology 7, no. 4.26 (November 30, 2018): 209. http://dx.doi.org/10.14419/ijet.v7i4.26.22169.

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The aim of this study was to investigate the role of the particle size, board density, resin content and hot press temperature on the properties of particleboard composite. Single-layered Kelempayan (Neolamarckia cadamba) particleboards bonded with phenol formaldehyde (PF) resins were manufactured. The boards were fabricated with three different particle sizes (0.5, 1.0 and 2.0 mm), two different board densities (600 and 700 kgm-3), two different resin contents (9 and 11%) and two different hot press temperatures (155 and 165˚C). The boards produced were evaluated for their modulus of elasticity (MOE), modulus of rupture (MOR), internal bond (IB) and thickness swelling (TS) in accordance with the Malaysia Standards. The study revealed that boards from smaller particles, higher resin contents and higher hot press temperatures gave higher MOE, MOR, IB and improved the TS. However, boards with higher densities gave higher MOE, MOR, IB and TS. Overall, the boards with the particle size of 0.5 mm, board density of 700 kgm-3, resin content of 11% and 165˚C of hot press temperature exhibited the greatest performance and were able to fulfill the Malaysia Standard specifications for furniture grade used in dry (PF1) and humid (PF2) and also for load-bearing applications in dry (PS1).

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23

Łatas, Waldemar. "Optimal positions of translational vibration absorbers in vibroisolation of mechanical press." MATEC Web of Conferences 285 (2019): 00008. http://dx.doi.org/10.1051/matecconf/201928500008.

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The paper deals with the problem of optimizing the positions of dynamic vibration absorbers in a mechanical press subjected to harmonic excitation force. Assuming flat motion of a rigid body and small vibrations, a discrete linear dynamic model of the press with absorbers is constructed. Using the results of numerical calculations, the optimal positions of the single or two vibration absorbers tuned to the excitation frequency, for different direction of excitation force, are obtained.

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24

Pan, Xiao Bin, Rong Zhou, Yang Pan, and Guo Ping Li. "A New Redundant Device for Monitoring Mechanical Press Slider Second Fall." Applied Mechanics and Materials 397-400 (September 2013): 166–71. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.166.

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this paper designs a redundant second fall detection device. On the basis of the traditional mechanical press slider second fall detection device, this new type device adds an MCU detection unit independent of traditional PLC system. Using the magnetic rotary encoder to replace traditional photoelectric encoder, realize non-contact measuring angle, which can reduce the probability of component failure. Compared with the traditional second fall detection device, this kind of redundant type second fall protection device can greatly increase the safety performance of the mechanical press.

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25

Pan, Xiao Bin, Xiao Mo Shu, and Guo Ping Li. "Dynamic Adjustment Method of Mechanical Press Slide Height Based on Linear Encoder." Applied Mechanics and Materials 397-400 (September 2013): 340–43. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.340.

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It is very important to control mechanical press slide height precisely when it works because it will lead to loss of stamping accuracy while the slide height error appears. The paper designed a novel controlling device based on linear encoder to adjust slide height dynamically. Equipped with high-precision linear encoder on the mechanical press slide, the height of slide measured by micro-controller real-timely, the device drives the controlling motor to adjust the position of slider if slide height error occurs.

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26

Guo, W. Z., K. He, K. Yeung, and R. Du. "A New Type of Controllable Mechanical Press: Motion Control and Experiment Validation." Journal of Manufacturing Science and Engineering 127, no. 4 (July 21, 2004): 731–42. http://dx.doi.org/10.1115/1.1954791.

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This paper is the second part of our study on designing a new type of metal forming press. In the first part of the study (Du, R., and Guo, W. Z., 2003, ASME J. Mech. Des., 125(3), pp. 582–592), a new controllable mechanical press is introduced that consists of a large constant-speed motor (CSM) and a small variable-speed servomotor (VSM). The CSM provides up to 80% of the power while the VSM tunes the motion of the ram. This new design has a number of advantages: it is flexible (i.e., its ram motion is programable), fast (its speed is limited only by the mechanical motion), and energy efficient (the CSM can use a large flywheel to ease the large instantaneous metal forming force). This paper focuses on the motion control and experiment validation. First, the inverse kinematics is presented, which gives the relationship between the ram travel and (i) the input angular displacements, velocities, and accelerations of the two motors. Next, a trajectory-planning method is given. Then, the sensitivity analysis is carried out, which helps to determine the key dimensions of the press and the error compensation scheme. Finally, two experiments are shown to demonstrate that the new press can accomplish different tasks.

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27

Liu, Xi Jun, Lin Xiang Liu, and Yu Mei Wang. "Based on Experiment of Constitutive Model of Load-Bearing Insulation Masonry." Applied Mechanics and Materials 204-208 (October 2012): 1089–93. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.1089.

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In order to obtained the constitutive equations of thermal insulation masonry, the four masonry with different angles has pressed. Study on thermal insulation of masonry compressive mechanical parameters of constitutive equation and two-stage by compression stress-strain curves obtained in the servo press machine tests and data processing. The Basic mechanics parameters can be provided for finite element analysis of thermal insulation composite wall. The experiments showed that the constitutive model is discretization and the maximum stress and strain by press machine testing is different from brick masonry. The constitutive model is close with curve by press machine testing. The performance of mechanics in thermal insulation wall can be application by the stress-strain curves of thermal insulation of masonry. The stress-strain curves based experiments can be used finite element analysis of thermal insulation wall.

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28

Zhu, Jian Feng, Na Han, Kun Wang, and Fen Wang. "Fabrication of Ti₂AlN by Mechanical Alloying and Hot Press Sintering." Advanced Materials Research 194-196 (February 2011): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.425.

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The dense layered ternary Ti2AlN ceramics were successfully synthesized by a combination of mechanical alloying and hot press sintering from the mixture of Ti and Al in nitrogen milling atmosphere. The phase transformation and morphology characteristics in mechanical alloying and subsequently hot press sintering were studied by using XRD and SEM as well as EDS. The results show that Ti(Al,N) amorphous powders were synthesized successfully by mechanical alloying. When the as milled powders were hot pressed at 1200 °C for 1 h, full dense and highly pure layered ternary Ti2AlN ceramic was synthesized.

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29

Yu, Jun, Li Chao Zhang, Yu Sheng Shi, Hai Yang Xiong, and Zu Ye Zhao. "Research on Velocity-Displacement Curve for Mechanical Linkage Servo Press." Applied Mechanics and Materials 446-447 (November 2013): 678–82. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.678.

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With main transmission system structural form of main servo motor-worm and worm gear commutation reducer-transmission screw-linkage force increasing mechanism, mathematical model of linkage force increasing mechanism is established to obtain the relationships of the velocity and displacement between nut and slide. Velocity and displacement of feature points of slide on the velocity-displacement curve inputted by user transform into which of nut by binary search algorithm and linear interpolation calculation. The feature points of nut transform into the velocity and displacement arrays of points based on S-curve, and then the arrays of points transfer through UDP protocol to lower computer. After the linear fine interpolation by Siemens Simotion D425 motion controller, slide moves according to the setting velocity-displacement curve. The experimental results show that slide moves smoothly, which meets specific technology requirements. The achievements have been successfully applied to a self-developed 2000KN mechanical linkage servo press in a production line of hot forming technology for more than one year, which extends the technology application scope of traditional mechanical press, and improves product quality.

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30

SATO, Takashi, Daisuke MIZUSHIMA, Hiroya MURAKAMI, and Naoto OHTAKE. "Press Fitting and Mechanical Clinching by Ultrasonic Vibration." Journal of the Japan Society for Technology of Plasticity 53, no. 618 (2012): 611–15. http://dx.doi.org/10.9773/sosei.53.611.

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31

Hlaváč, Jan, and Milan Čechura. "Direct Drive of 25 MN Mechanical Forging Press." Procedia Engineering 100 (2015): 1608–15. http://dx.doi.org/10.1016/j.proeng.2015.01.534.

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32

Yang, Charles Q., Weishu Wei, and Gary C. Lickfield. "Mechanical Strength of Durable Press Finished Cotton Fabric." Textile Research Journal 70, no. 2 (February 2000): 143–47. http://dx.doi.org/10.1177/004051750007000209.

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33

Yang, Charles Q., Weishu Wei, and Gary C. Lickfield. "Mechanical Strength of Durable Press Finished Cotton Fabric." Textile Research Journal 70, no. 10 (October 2000): 910–15. http://dx.doi.org/10.1177/004051750007001010.

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34

Zheng, Enlai, Fang Jia, Hongwei Sha, and Suhao Wang. "Non-circular belt transmission design of mechanical press." Mechanism and Machine Theory 57 (November 2012): 126–38. http://dx.doi.org/10.1016/j.mechmachtheory.2012.07.004.

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35

Matthews, Jermey N. A. "Mechanical metamaterials roll off the 3D printing press." Physics Today 68, no. 9 (September 2015): 26–27. http://dx.doi.org/10.1063/pt.3.2910.

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36

Chung, Chin-Sung, Baeg-Soon Cha, and Ho-Kyung Kim. "OPTIMUM JOINING CONDITIONS IN A MECHANICAL PRESS JOINT." Materials and Manufacturing Processes 16, no. 3 (June 30, 2001): 387–403. http://dx.doi.org/10.1081/amp-100107382.

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37

Zhauyt, Algazy, Assel Mukasheva, Saduakhas Japayev, Gulnara Abdraimova, Batyrkhan Kyrykbaev, Kuatbek Kozhamberdiyev, and Bagdat Uskembayeva. "A dynamic analysis of six-bar mechanical press." Vibroengineering PROCEDIA 13 (September 26, 2017): 249–54. http://dx.doi.org/10.21595/vp.2017.18853.

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李, 杭. "Design and Analysis of Mechanical Press Experimental Platform." Mechanical Engineering and Technology 09, no. 03 (2020): 207–18. http://dx.doi.org/10.12677/met.2020.93022.

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Kang, In-Sook, Charles Q. Yang, Weishu Wei, and Gary C. Lickfield. "Mechanical Strength of Durable Press Finished Cotton Fabrics." Textile Research Journal 68, no. 11 (November 1998): 865–70. http://dx.doi.org/10.1177/004051759806801112.

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Sopilkin, G. V., A. D. Zhaivorenko, V. A. Sidorov, V. I. Isaenko, and V. N. Zolotukhin. "Diagnosing mechanical equipment in a tube-press shop." Metallurgist 35, no. 5 (May 1991): 85. http://dx.doi.org/10.1007/bf01155050.

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Ibhadode, A. O. A., and T. A. Dean. "Simulation and Experimental Verification of Completely Closed Cavity Die Forging on a Mechanical Press." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 203, no. 1 (February 1989): 17–32. http://dx.doi.org/10.1243/pime_proc_1989_203_042_02.

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A mathematical model for mechanical press forging is developed and applied to solid cylindrical shapes forged in a sprung completely closed cavity die. It is used to investigate the effects of various process variables on the forging process. Cold and hot forging tests, using commercially pure aluminium and AISI 1045 steel respectively, were carried out on a 2000 kN mechanical press. Experimental results compared well with those obtained from the theoretical model.

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Liu, Chen, Sheng-Dun Zhao, and Jing-Xiang Li. "Design and analysis of a novel seven-bar mechanical servo press with dual motors inputs." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 231, no. 20 (June 2, 2016): 3855–65. http://dx.doi.org/10.1177/0954406216653777.

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This paper proposes a novel high capacity servo press system with two servo motor inputs and high ratio force amplifier mechanism for metal forming. First, the press structure was expressed. The force amplifier was made of seven-bar mechanism which possesses quick-return character and high ratio force amplifier. The symmetric structure balanced the force in horizontal direction, and dispersed the forces on two transmission routes. In theoretical study of the new structure, kinematic and dynamic analyses were obtained by examining the geometry of the structure. The performance of press was discussed by example demonstration. Finally, the kinematic experiments and metal forming experiments were carried out on the prototype machine by using grating scale system. The measured data match the theoretical calculation well, which validates the feasibility of this new press mechanism.

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Chen, Gui Hua, and Dan Dan Wang. "Mechanical Properties of Rice Straw Particle/HDPE Composites." Applied Mechanics and Materials 457-458 (October 2013): 227–30. http://dx.doi.org/10.4028/www.scientific.net/amm.457-458.227.

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The rice-straw particle /HDPE composites were made by compression molding process. Effects of the content of the rice-straw particle, the dosage of the titanate coupling agent and the time of hot-press were analyzed. Mechanical properties of the composites were tested, such as MOR, MOE by universal material testing machine. The result showed that rice-straw particle /HDPE composites have relatively good mechanical properties. The effect of the content of the rice-straw particle on the MOR and MOE of rice-straw particle /HDPE composites are very significant.The mechanical properties of the composite material improved by adding titanate coupling agent. The optimized processing conditions are that the content of the rice-straw particle is 50%,the dosage of the titanate coupling agent is 3%,the time of hot-press is 4 min.

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Del Prete, Antonio, and Teresa Primo. "Sheet Metal Forming Optimization Methodology for Servo Press Process Control Improvement." Metals 10, no. 2 (February 19, 2020): 271. http://dx.doi.org/10.3390/met10020271.

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In sheet metal forming manufacturing operations the use of servo presses is gaining more interest due to the opportunity to improve process performance (quality, productivity, cost reduction, etc.). It is not yet clear how to proceed in the engineering process when this type of operating machine is used to achieve the maximum possible potential of this technology. Recently, several press builders have developed gap- and straight-sided metal forming presses adopting the mechanical servo-drive technology. The mechanical servo-drive press offers the flexibility of a hydraulic press with the speed, accuracy and reliability of a mechanical press. Servo drive presses give the opportunity to improve the productivity of process conditions and improve the quality of stamped parts. Forming simulation and numerical optimization can be useful tools to define beforehand the optimal process parameter set-up in terms of servo press downward curve properties. This is done by carrying out a sensitivity analysis of the forming parameters having influence on said curve. The authors have developed a numerical methodology able to analyze the influence factors, for comparison with the degrees of freedom made available by the usage of a servo press, in terms of stroke profile management, to obtain an optimized process parameters combination.

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Ge, Xin Fang, Yuan Shen, and Chan Gan Zhu. "The Optimal Combination of the Planar Bar Group on an Eight-Link Mechanical Press Based on MSDV." Applied Mechanics and Materials 271-272 (December 2012): 1183–89. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1183.

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Based on the MSDV (the minimum sum of the displacement variance), the optimal combination of the bar group on a planar eight-link mechanical press is studied in this paper. Firstly, we establish the kinematic equations of a simplified planar eight-link by dividing the planar eight-link into three modules and resolving them step by step. With the established kinematic equations, we simulate the movement of the planar eight-link and obtain its curve of displacement, velocity and acceleration. Final, we get the optimal combination of the eight-link mechanical press based on MSDV. The simulation of the optimal planar eight-link bar group indicates that the displacement curves of the four eight-links included in a eight-link mechanical press almost coincide.

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He, Kai, and Ru Du. "A Simple Parameter Calibration Method for a Novel Controllable Mechanical Metal Forming Press." Materials Science Forum 505-507 (January 2006): 943–48. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.943.

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This paper introduces a novel controllable mechanical metal forming press, which is a 2-DOF planar mechanism driven by a large constant speed motor and a small servomotor. The constant speed motor provides the main power while the servomotor tunes the trajectory and velocity of the punch in order to realize the controlled punch motion. The new press needs high accuracy, repeatability and resolution to guarantee the controlled punch motion. Improving manufacturing and assembly process could help it, but sometimes is very difficult and not feasible. Therefore parameter calibration has a significant effect on the accuracy, repeatability and resolution of the press. In this work, a simple parameter calibration method is presented without using complex and precise metrology system. Experiment results indicate that this kind of calibration method is fast, easy, accurate and cost effective.

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Jandaĉka, Daniel, and František Vaverka. "Validity of Mechanical Power Output Measurement at Bench Press Exercise." Journal of Human Kinetics 21, no. 1 (January 1, 2009): 33–40. http://dx.doi.org/10.2478/v10078-09-0004-7.

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Validity of Mechanical Power Output Measurement at Bench Press ExerciseIn sport training and rehabilitation practice, it is usual to use methods of mechanical muscle power output measurement, which are based mainly on indirect force measurement. The aim of this study was to verify the validity of indirect measurement for mechanical muscle power output with bench press exercise. As a criterion of validity, we selected a combination of kinematic and dynamic analyses. Ten men participated in this study. Average age of tested subjects was 28.0 ± 3.4 years. At mechanical power output measurement, these subjects lifted at maximum possible speed loads of 18, 26.5, 39.2 and 47.7 kg. Validity of mechanical power output measurement by means of a method using indirect force measurement was estimated using Spearmen's Correlation Coefficient. Factual significance of differences in average values of power output, force and velocity, measured by a method using indirect force measurement, in comparison to the selected criterion, was evaluated by means of effect of size. Power output measurement method using indirect force measurement showed lower values of force in relation to the criterion in the whole scope of selected loads. Velocity values in the whole scope of selected loads did not show any significant difference between the criterion and the verified method. The mechanical muscle power output measured by the method using indirect force measurement is lower in relation to the criterion, especially in the low scope of loads, where also validity rate was low (R = 0.5).

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Connolly, Patrick J. "Review of David Sytsma's Richard Baxter and the Mechanical Philosophers." Locke Studies 19 (January 19, 2019): 1–5. http://dx.doi.org/10.5206/ls.2019.6246.

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Upola, Heikki, ARI ÄMMÄLÄ, VEIKKO KANKAANPÄÄ, and MIRJA ILLIKAINEN. "Press wetting as an enhanced wetting method for baled OCC material." January 2017 15, no. 1 (February 1, 2016): 9–16. http://dx.doi.org/10.32964/tj15.1.9.

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A procedure to mechanically force water into the bale structures of old corrugated container (OCC) material was studied and evaluated in low-consistency pulping studies. Two mechanical methods were used in the study: (1) roll pressing of sheets and (2) press wetting of bales. Mechanical pressing was first used in simple roll tests to evaluate nip pressure as an enhanced effect on wetting. Repeated press wetting treatments were found to increase water penetration into the sheets and appeared to lower wet strengths. A simple laboratory-scale bale pressing device was constructed and the effect of different parameters in wetting method was studied. We found that when a bale was pressed under water, multiple pressings were needed to get efficient press wetting. Increased temperature was found to increase water penetration inside the porous structure of linerboard. We also discovered that there must be a delay between relaxation and pressing to allow water to travel within a board and to wet all surfaces. The wetting procedure also evaluated the weight of water inside the bale. Results showed that the amount of water could be used as an indicator of the pulping kinetics and energy consumption needed to disintegrate OCC. The enhanced method (i.e., hydraulic pressing) could provide efficient wetting on an industrial scale. With this method, a 30% savings in the energy consumption required in pulping unit operation is possible.

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Wang, Hua Jun, Yu Zhu Sun, Yan Zhao Wu, and Hua Chang Wang. "Thermomechanical Load Study on FGM Clad Hot Forging Die under Mechanical Press." Advanced Materials Research 291-294 (July 2011): 693–97. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.693.

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Hot forging die bear periodic thermal load and mechanical load during service, and bad work environment makes the service life of dies generally short. Hot forging die damages mainly appear in temperature fluctuation zone, and gradient composite materials cladding process can be used to do surface treatment on homogeneous hot forging die. This process can greatly decrease the peak value of temperature and stress and prolong the service life of hot forging die. FE model of hot forging process under mechanical press was build based on Deform-2D, temperature and stress field of homogeneous hot forging die and FGM surface cladding hot forging die under mechanical press were compared. Then the characters of thermomechanical load based on FGM surface cladding hot forging die were described, which provided foundation for design and manufacture of FGM hot forging die.

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