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Journal articles on the topic 'Servo press'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Behrens, Bernd-Arno, Richard Krimm, and André Höber. "Auslegung von Servopressenantrieben/Design of Servo Press Powertrains." wt Werkstattstechnik online 110, no. 06 (2020): 445–49. http://dx.doi.org/10.37544/1436-4980-2020-06-85.

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Die Auslegung des Antriebsstrangs einer Servopresse stellt einen komplexen Prozess dar. Aufgrund der konstruktiven Wechselwirkung der Komponenten ist dieser mit einer potenziell großen Anzahl von Iterationsstufen, häufig auch im Kontakt mit Zulieferern, verbunden. Im Beitrag wird ein Softwaretool vorgestellt, das den Entwicklungsprozess einer Servo- presse beschleunigt und variabler gestaltet. Im Rahmen des Vorhabens wurde neben einem parametrischen Motormodell ein variables mechanisches Modell eines Servopressen-Antriebsstrangs erstellt und validiert.   The design of a servo press drive is a complex process. Due to the interaction of the design components in the drive train, it is subject to a potentially large number of iteration stages, often also in contact with suppliers. This article presents a software tool that accelerates the development process of an electrical servo press drive. Within the presented research project, a parametric motor model and a mechanic model of a servo press powertrain were developed and validated.

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2

Lu, Wen Qi, Yu Wen Hu, Hu Liu, Wei Min Shi, and Xu Dong Hu. "Analysis of Drive Performance of Servo System for Servo Press." Advanced Materials Research 614-615 (December 2012): 485–92. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.485.

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Based on the constant speed driving mode of servo motor, analysis of capacitor energy storage device’s parameter design was made, and then a group of reasonable capacitor energy storage parameters were given. Based on the parameters, to realize variable speed driving and multi-adaptability of the press, it put emphasis on analysis of the servo driver’s control parameters and the press’s output ability. And important conclusion was also provided. To confirm the accuracy of the conclusion, the special permanent magnet AC servo system was designed and experiment was carried on it. The results prove that the designed capacitor energy storage device can satisfy the power and control request of press stamping. Analysis on control parameters of the servo driver and output ability of the press is reasonable, which provides the reference for the development of servo press’s flexibility.

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3

Xia, Lian, Yang Xiao, Gui Shan Li, Hua Zhai, and Jiang Han. "Research of New Servo-Hydraulic Press Based on the AC Servo Motor Control." Key Engineering Materials 522 (August 2012): 542–45. http://dx.doi.org/10.4028/www.scientific.net/kem.522.542.

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Servo-hydraulic press is a kind of hydraulic press which has feedback device and can detect and feedback signals. Nowadays traditional servo-hydraulic press based on proportion-al servo valve control has been often used,but the study of this article is a new servo-hydraulic press based on the AC servo motor control. In this article, the hydraulic system of new servo-hydraulic press,and the electrical control system including the hardware component and software system have been mainly designed.

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4

Chen, Shang Liang, Dinh Hoai Nam, and Nguyen Van Thanh. "Synchronous Controller for Dual Servo Motor in Servo Press." Applied Mechanics and Materials 494-495 (February 2014): 1175–81. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1175.

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This study shows the results of double servomotors synchronization controller (SC) for Mirco-precision servo press. Two systems are used in this study, one is the master motor and another is the slave motor. Each system is designed separately. Also, it is necessary to use the synchronous controller to minimize the synchronization error and the motion command is transmitted simultaneously to two motors. The control system for the master motor includes a feedback controller (FB) and a zero phase error tracking controller (ZPET). For the slave motor, only velocity is controlled. The feedback controller is a cascade control structure, velocity and position controller. It can make the output follows the command. In order to reduce synchronized motion error, two servomotors are synchronized by the SC. The results of simulation reveal that the performance of the overall control system is improved compare to open loop, the synchronous position error between two sliders were less than 4μmm.

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5

ENDOU, Junichi. "Innovation of Press Working by Servo Press." Journal of the Japan Society for Technology of Plasticity 49, no. 565 (2016): 100–104. http://dx.doi.org/10.9773/sosei.49.100.

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6

OSAKADA, Kozo. "Innovation of Press-Work with Servo Press." Journal of the Japan Society for Technology of Plasticity 49, no. 565 (2016): 99. http://dx.doi.org/10.9773/sosei.49.99.

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7

ISHIKAWA, Takashi. "Metal Forming Using Servo Press." Journal of the Japan Society for Technology of Plasticity 49, no. 565 (2016): 114–17. http://dx.doi.org/10.9773/sosei.49.114.

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8

Li, Jian Ying, Tian Ye Yang, Yan Wei Wang, Zhi Yong Mao, and Li Gang Wu. "Study of Electro-Hydraulic Force Servo System Based on Flow Press Servo Valve and Neural Network Intelligent Control Strategy." Applied Mechanics and Materials 427-429 (September 2013): 1167–70. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1167.

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The flow press servo valve has very special work principle, and it now is widely used in the electro-hydraulic force servo system as main and kernel part. According to its special work principle, electromagnetic basic theory and the flow continuity equation, the mechanics analysis of every main part of the flow press servo valve was finished; the author built the mathematic model of the flow press sever valve. During the process of building model, the author took into account the load torque on the torque motor keeper and the total load torque of torque motor. On the other hand, the neural network intelligent control strategy was used in the force servo system to improve the whole system performance. The mathematic model of the electro-hydraulic force servo system controlled by the flow press servo valve with the neural network control strategy was built. The simulation curves and the experiment curves were accord compared by system simulation and experiment results, so we can know also that the mathematic model of the flow press sever valve and the electro-hydraulic force servo system controlled by this kind of valve with the neural network intelligent control strategy are correct.

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9

Watanabe, Akihiro, Yuji Kotani, Hisaki Watari, and Takehiro Shimizu. "Evaluation of Press Formability Using Servo Die Cushion in Deep Drawing." Materials Science Forum 654-656 (June 2010): 322–25. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.322.

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Manufacturing process using servo press machines have been highlighted in car manufacturers and other industries in Japan. It is necessary to establish an appropriate press working conditions for manufacturing highly accurate products with great extra value. Our aim is to investigate into effects of variable BHF (blank holding force) on press formability, comparing to using a conventional press machine. In this study, FEM analyses of deep drawing process using a variable BHF system has been conducted to demonstrate the effectiveness of a servo die cushion on formability. According to experimental results obtained with a servo die cushion, it is found that maximum load subjected to dies was reduced by 11.8 %, when using a servo press with a servo die cushion comparing to a conventional press.

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10

Qiu, Ying, Wei Min Li, and Zhi Wei. "Performance Analysis of Triangular Elbow Servo Press." Applied Mechanics and Materials 577 (July 2014): 240–43. http://dx.doi.org/10.4028/www.scientific.net/amm.577.240.

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The objective of this paper is to study performance of triangular elbow transmission mechanism for servo press. Then kinematics models are deduced and given. Kinematics curves along slider motion direction are drawn. Moreover, under the same driving condition, the effects of different link ratios on slider output motion are examined and compared with common six bar transmission mechanism in the article. Through motion curves comparison, it can be seen that this triangular elbow mechanism has significant force increasing effect and good quick-return characteristics. In addition, we carried on triangular elbow servo press virtual design and simulation. The case study provides more visual and reliable decision basis for designer. The results would be useful reference for optimization design of transmission mechanism.

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11

YAGI, Takashi. "Tool Engineering Utilizing Servo-Driven Press." Journal of the Japan Society for Technology of Plasticity 47, no. 546 (2006): 564–68. http://dx.doi.org/10.9773/sosei.47.564.

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12

Feng, Jing Chang, Xiang Dong Kong, Jin Zhang, Li Juan Wang, and Chun Qing Liu. "Analysis of Hydraulic Press Servo System Based on Robust Controller." Applied Mechanics and Materials 644-650 (September 2014): 421–28. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.421.

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This paper researches and analyzes the modeling of electro-hydraulic proportional servo system to improve the characteristics of forging hydraulic servo control system and meet their requirements of forging a variety of materials. Based on robust compensator design, PID control strategy is proposed with uncertain disturbance of hydraulic press hydraulic servo system and the response characteristics of the system is simulated and analyzed. The results show that hydraulic press servo system which uses robust compensator has better performance than the traditional PID control and the chattering is eliminated. The test results and simulation results are compared by building simulation test system of 60MN hydraulic press electro-hydraulic proportional control system.

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13

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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14

Taoka, Hideki, Hiroyuki Nobuta, Hideo Meguri, and Yoshihiro Kageyama. "Optimization of Motion Control in High-Speed Servo Press Line." International Journal of Automation Technology 4, no. 5 (September 5, 2010): 439–46. http://dx.doi.org/10.20965/ijat.2010.p0439.

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Honda Engineering Co., Ltd. developed an innovative servo press line that achieves the world’s highest level of productivity in producing deep-drawn automotive body panels. The innovative press production system was made so that the press forming conditions and panel transfer motions are adjusted to the dies very accurately for each part to be produced. The servo press line is planned to be expanded to Honda’s production plants on a global scale while allowing further evolution.

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15

Murakami, Tomohiro, Ming Yang, Hiroshi Kishi, Sigeki Mori, Masahiro Ohkawa, and Eiichi Fujino. "Reducing Blanking Vibration with Active Vibration Control Using a Servo Press." Key Engineering Materials 716 (October 2016): 510–20. http://dx.doi.org/10.4028/www.scientific.net/kem.716.510.

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Blanking noise and blanking vibration are causes of pollution. At the same time, blanking vibration disturbs the high precision of a press work product, and shortens the life expectancy of the press machine and the press die. Recently, the use of a servo press has been developed to improve these problems, using low speed blanking and pulse vibration banking. However, these methods lengthen the blanking time, so it is necessary to control the servo press properly in the case of blanking. In this study, we describe a principle for the reduction of blanking vibration when using a servo press, and we propose an active vibration control method for the reduction of blanking vibration. We used a crank servo press of 450kN in an experiment, which has a pulse motion of 10Hz. We conducted a simulation and an experiment of blanking using an active vibration control method, which we named “counter pulse blanking.” We confirmed that counter pulse blanking is effective in reducing vibration as a result of the simulation and the experiment.

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16

SUZUKI, Yuichi, and Yoshio IWATA. "411 Cycle-time shortening of AC servo press by servo parameter adjustment." Proceedings of Conference of Hokuriku-Shinetsu Branch 2005.42 (2005): 125–26. http://dx.doi.org/10.1299/jsmehs.2005.42.125.

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17

Zhang, Juan, and Xing Song Wang. "Model Reference Adaptive Motion Control Research of Servo Press." Applied Mechanics and Materials 532 (February 2014): 212–17. http://dx.doi.org/10.4028/www.scientific.net/amm.532.212.

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Servo press is a new developing trend in forming equipment. In order to improve the position control accuracy, the movement rule of crank press slide block is analyzed. In view of the servo press poison PID control algorithm parameters cant realize real-time adjustment, model reference adaptive control strategy is presented, and a real-time control experiment platform is established in xPC target environment based on MATLAB RTW. The experiment results shows that the model reference adaptive control strategy is of higher accuracy and better robustness than the PID control strategy.

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18

Yi, Jian Jun, Fei Luo, Bai Yang Ji, Hui Jiang, and Shao Li Chen. "Developing a DSP-Based Control System of Servo Punch Press Using Model-Based Method." Advanced Materials Research 663 (February 2013): 465–69. http://dx.doi.org/10.4028/www.scientific.net/amr.663.465.

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Servo punch press uses a servo motor to drive. It can set different stroke length and velocity according to different production requirements, and can always ensure the formation precision of the bottom dead center. It has the advantages of high efficiency, high precision and low noise, and it presents the development trend of punch press. The key point of the servo punch press development is its control system. According to the functional requirements and technical performance of the servo punch press, the general approach of the servo punch press material forming control law is discussed in this paper. The development platform based on DSP control system has built up as well. By means of the Simulink and the Target for TI C2000 tools in Matlab, the dynamic model of punch press system and controlling model, including forming model, DSP-based controller model and plant model,etc., have been designed. Base on this, the forming characteristics of different materials, forming control algorithms have been studies through simulation and virtual experiments.The controller algorithm can be transferred automatically to the target controller. This approach can reduce developing time and costs of servo punch press control system and improve developing efficiency.

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19

ANDO, Hiroyuki. "Use for Servo Press in Forging Process." Journal of the Japan Society for Technology of Plasticity 50, no. 577 (2009): 81–82. http://dx.doi.org/10.9773/sosei.50.81.

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20

NISHIMURA, Hisashi, Youichi UENO, Yoshikiyo TAMAI, Toshiharu SUGANUMA, Isamu MATSUO, and Chikara MURATA. "Characteristic of Servo Press and Processing Example." Journal of the Japan Society for Technology of Plasticity 50, no. 586 (2015): 986–91. http://dx.doi.org/10.9773/sosei.50.986.

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21

Yu, Sui Ran, and Yun Wei Lu. "Design Task Decomposition in the Servo Press." Applied Mechanics and Materials 34-35 (October 2010): 1966–72. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1966.

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This research is to find a design method for the large scale and complex product system. Thus, we made an approach to possibly better solution with limited time, limited resources and limited costs. This paper aims to find a method to quantify the solving process of the first stage in the concurrent design – “task decomposition”, in order to make preparations necessary for the next two stages -“concurrent task process” and “convergent coordination”. According to product's functional unit, we first decentralized complex product system into sub-modules. Then determine the importance and coherence among these sub-modules by using analytic hierarchy (AHP). Combining the results of the two judgments, we further classify the sub-modules to form distributed sub-systems, so that different design teams can work more effectively and more efficiently during their respective period. Finally, we verify the usefulness and effectiveness of the distributed method with an example of design task decomposition in servo press.

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22

Yu, Sui Ran, and Yun Wei Lu. "Design Task Decomposition in the Servo Press." Applied Mechanics and Materials 34-35 (October 2010): 981–87. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.981.

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This research is to find a design method for the large scale and complex product system. Thus, we made an approach to possibly better solution with limited time, limited resources and limited costs. This paper aims to find a method to quantify the solving process of the first stage in the concurrent design – “task decomposition”, in order to make preparations necessary for the next two stages -“concurrent task process” and “convergent coordination”. According to product's functional unit, we first decentralized complex product system into sub-modules. Then determine the importance and coherence among these sub-modules by using analytic hierarchy (AHP). Combining the results of the two judgments, we further classify the sub-modules to form distributed sub-systems, so that different design teams can work more effectively and more efficiently during their respective period. Finally, we verify the usefulness and effectiveness of the distributed method with an example of design task decomposition in servo press.

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23

MATSUMOTO, Ryo. "Indentation Joining with Oscillation Using Servo Press." JOURNAL OF THE JAPAN WELDING SOCIETY 83, no. 3 (2014): 195–98. http://dx.doi.org/10.2207/jjws.83.195.

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24

TSO, Pei-Lum, and Cheng-Ho LI. "Study of Servo Press with a Flywheel." Journal of Advanced Mechanical Design, Systems, and Manufacturing 2, no. 1 (2008): 1–11. http://dx.doi.org/10.1299/jamdsm.2.1.

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25

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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26

Murata, Chikara, Yuichi Hashimoto, Hiroki Sunagawa, and Kazuhiro Ichikawa. "Visualized press working and new feedback control for servo press." Procedia Manufacturing 15 (2018): 1033–40. http://dx.doi.org/10.1016/j.promfg.2018.07.390.

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27

Behrens, B. A., R. Krimm, J. Jocker, and T. Nitschke. "Leistungsverzweigter Servopressenantrieb*/Power-split servo press drive - Control of a new servo press drive with mechanical power split." wt Werkstattstechnik online 105, no. 05 (2015): 291–96. http://dx.doi.org/10.37544/1436-4980-2015-05-43.

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Am Institut für Umformtechnik und Umformmaschinen der Leibniz Universität Hannover wird zurzeit an einer neuartigen Antriebslösung für Servopressen gearbeitet, welche die Vorteile von Servopressen und Exzenterpressen mit Schwungradantrieb vereint. Ziel ist, sowohl bei der Anschaffung als auch im Betrieb Kosten einzusparen. Für die Ansteuerung der Antriebsmotoren wurde ein spezielles Regelkonzept erarbeitet, das sich deutlich von bestehenden Regelungssystemen heutiger Servopressen abgrenzt.   At the Institute of Forming Technology and Machines (Leibniz Universität Hannover), a new drive concept for servo presses is being developed which combines the advantages of servo presses with a high dynamic powertrain and flywheel based eccentric presses. This is intended to save acquisition and operating costs. To control the drive engines, a special control concept has been developed which is completely different from control systems of modern servo presses.

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28

Engel, Bernd, Sebastian Kersten, and Peter Kopfer. "Process-Controlled Forming Using an Intelligent Tool on a Servo Press." Key Engineering Materials 622-623 (September 2014): 780–87. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.780.

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With regard to the climate change as well as the shortage and increase in price of natural resources, efficient resource management becomes more and more important, also for production processes. More than half of the sheet metal used in the automotive industry is wasted. Considering the amount of energy and the added value associated to the discards, enormous savings are possible. The approach of this research work is to avoid waste during a forming process by means of a continuous process monitoring and a self-learning intelligent tool interacting with the servo press. The flexibility of the servo press, which is so far used to optimize the single press stroke, only, shall be exerted to respond on altering material properties of blank sheets and the thereby changing forming behaviour. The sample process includes a two-tiered bending process, in which a conventional punch performs the pre-bending in the first step and an independent servo axis the compensation-bending in the second step. If an inadmissible bending angle is measured after the second step, the servo press stops automatically and the additional servo axis performs a teaching-stroke to adjust the compensation angle. After that, the continuous process starts again. This paper presents the springback compensation strategy which uses flexible correction algorithms based on data of the on-line process monitoring as well as data of the previous bending steps. Finite Element Analyses are carried out to validate the strategy.

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29

Chen, Hong Ming, Chun Sheng Shen, and Ting En Lee. "Implementation of Precision Force Control for an Electro-Hydraulic Servo Press System." Applied Mechanics and Materials 190-191 (July 2012): 806–9. http://dx.doi.org/10.4028/www.scientific.net/amm.190-191.806.

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Based on the fuzzy method, a PC-based precision force control scheme is proposed for the electro-hydraulic servo press system. The main feature of proposed scheme is to develop a composite control of relief valve and flow servo valve. With the feedback of force sensor, the fuzzy-based control system is realized by LabVIEW for achieving the precision force control of hydraulic cylinder. In the experiments, a practical platform of hydraulic servo press system is used to demonstrate the effectiveness of proposed scheme. The testing results indicate the accurate output responses.

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30

Ichikawa, Kazuhiro, Chikara Murata, and Tatsuya Takahashi. "Nonsimultaneous Press Forming Using 4-axes Direct Drive Digital Servo Press." Procedia Engineering 81 (2014): 1669–74. http://dx.doi.org/10.1016/j.proeng.2014.10.210.

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31

Watanabe, Akihiro, Y. Kotani, K. Nishimura, Hisaki Watari, and Takanori Yamazaki. "Effects of Elastic Behaviour of Dies and Servo Press Machine on Deep Drawing Process." Advanced Materials Research 89-91 (January 2010): 621–26. http://dx.doi.org/10.4028/www.scientific.net/amr.89-91.621.

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Characteristic features of elastic deformation of dies and presses during deep drawing were measured to examine the effects of elastic deformation of the press and dies on product accuracy. Strains were measured on the press including dies, a slide and a bolster of a servo press. A strain magnitude of 63 ×10-6 was obtained when the slide position was at the lowest point. Two slide motions of the servo press were selected to determine appropriate manufacturing conditions. An elastic deformation analysis of the die structure was then performed by CAD simulation. To find an appropriate die structure model, the vertical displacement of the die structure in the CAD simulation was compared to the experiment results. It was found that the vertical displacement of the die structure was 0.147 [mm] at the top surface of the die when considering elastic deformation of the die structure as well as the bolster of the servo press.

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32

Yeung, W. K., J. P. Li, K. He, Y. X. Luo, C. T. Kong, and R. Du. "Control System Design for a New Servo Press." IFAC Proceedings Volumes 41, no. 2 (2008): 5782–87. http://dx.doi.org/10.3182/20080706-5-kr-1001.00975.

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33

KOGA, Nobuhiro, Masaaki KUBO, and Kunlachart JUNLAPEN. "Burr-Free Shearing Using NC Servo Press Machine." Journal of the Japan Society for Technology of Plasticity 48, no. 558 (2007): 645–49. http://dx.doi.org/10.9773/sosei.48.645.

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34

SAKAGUCHI, Minoru. "High Function and Value Forming by Servo Press." Journal of the Japan Society for Technology of Plasticity 49, no. 565 (2016): 110–13. http://dx.doi.org/10.9773/sosei.49.110.

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35

SUGANUMA, Toshiharu. "Application of Servo Press to Sheet Metal Forming." Journal of the Japan Society for Technology of Plasticity 49, no. 565 (2016): 118–22. http://dx.doi.org/10.9773/sosei.49.118.

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36

MATSUNO, Shuichi. "Evolutionally-Advanced High Speed Servo Tandem Press Line." Journal of the Japan Society for Technology of Plasticity 52, no. 600 (2011): 168–70. http://dx.doi.org/10.9773/sosei.52.168.

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37

KAWAMOTO, Kiichiro. "History and Future Application of AC Servo Press." Journal of the Japan Society for Technology of Plasticity 52, no. 600 (2011): 174–76. http://dx.doi.org/10.9773/sosei.52.174.

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38

YANG, Ming, and Hisashi NISHIMURA. "Advanced Application of Servo-press in Metal Forming." Journal of the Japan Society for Technology of Plasticity 55, no. 645 (2014): 897–901. http://dx.doi.org/10.9773/sosei.55.897.

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39

ISHIKAWA, Takashi, and Takahiro ISHIGURO. "High Precision Cold Forging by Using Servo Press." Journal of the Japan Society for Technology of Plasticity 55, no. 645 (2014): 902–6. http://dx.doi.org/10.9773/sosei.55.902.

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40

MATSUMOTO, Ryo. "Enhancement of Forging Limit by Using Servo Press." Journal of the Japan Society for Technology of Plasticity 58, no. 674 (2017): 187–91. http://dx.doi.org/10.9773/sosei.58.187.

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41

SHINOMIYA, Naruaki, and Nobuhiko SHIRAKAWA. "928 Impact Extrusion of A1070 by Servo Press." Proceedings of the Materials and processing conference 2012.20 (2012): _928–1_—_928–5_. http://dx.doi.org/10.1299/jsmemp.2012.20._928-1_.

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42

Xia, Qin Xiang, Teng Xu, Zhen Shi Li, and Wei Ping Ruan. "Influence of Slide Stroke Curves on Forming Quality of Box Shaped Part during Deep Drawing." Advanced Materials Research 562-564 (August 2012): 1177–81. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1177.

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To explore the influence of slide stroke curves on deep drawing and solve the problems of cracking and wrinkling during drawing, the deep drawing processes of box shaped part with the conventional mechanical press and servo press were simulated, respectively. The variation rules of cracking and wrinkling for box shaped part by different slide stroke curves were obtained. It shows that the qualified parts can be obtained more easily when drawing with servo presses by decreasing the rotational speed of servo motor at the forming stage due to its variability; drawing cycle can be shorten effectively by adjusting the variable displacement-velocity curves of servo press.

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43

Li, Bin, Dong Xiang Shao, Guang Lin Wang, and Hui Feng Wang. "Development of the Control Section for a New Armature Components Assembly Machine and its Application Test." Key Engineering Materials 522 (August 2012): 373–77. http://dx.doi.org/10.4028/www.scientific.net/kem.522.373.

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The armature components are the core component of the electro-hydraulic servo valve [. Its manufacturing and assembly accuracy directly affects the performance of the servo valve. The domestic existing electro-hydraulic servo valve armature assembly pressure equipment is so far behind that it is difficult to meet production requirements. For the needs of a servo valve production firm, authors department developed the armature components automatically press machine. In order to achieve automation and intelligent of press process, this article supports a electronic control system for the press machine to further improve its ability. And on the basis of certain experiments, the author proves the good performance of the pressure machine.

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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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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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Sanada, K. "A method of designing a robust force controller of a water-hydraulic servo system." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 216, no. 2 (March 1, 2002): 135–41. http://dx.doi.org/10.1243/0959651021541507.

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Robust force control of a water-hydraulic servo system is discussed. The system treated in this paper is a model of a moulding press used for a fabrication process of large-scale integration packages. The whole surface of a wafer is covered with a thin plastic layer by the press. The performance of force control is important to obtain sufficient quality. The press is driven by a ram cylinder and a water-hydraulic servo valve. Considering the uncertainty caused by the flow characteristics of the valve in the overlap region and the mechanical stiffness of the press, a method of designing a robust force controller is proposed by applying H∞ control theory. Qualitative evaluation of modelling error is the key to the design of the robust controller. The performance of the robust controller is examined using an experimental water-hydraulic servo system set-up. It is illustrated how the system responses are influenced by the weighting function parameters of H∞ control theory.

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He, Kai, Jiu Hua Li, Xie Feng Ou, and Ru Xu Du. "A New Type of Servo Direct Drive Turret Punch Press." Advanced Materials Research 139-141 (October 2010): 752–57. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.752.

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A new type of servo direct drive turret punch press is presented. A servomotor to drive the eccentric-toggle mechanism is used in our design, which combines the advantages of mechanical and hydraulic turret punch press. The displacement, velocity, and acceleration of the punch are calculated, through the kinematics analysis. So, the motion of the punch is controllable through the rotation of the servomotor. Then, the inverse kinematics analysis is studied in detail, and the corresponding motion of the servomotor can be gotten, for different punch motion curves, according to the production requirement. For example, when we design a motion of the punch for a particular stamping process, the motion of servomotor can be obtained through the inverse kinematics analysis. Finally, Output force is acquired by static force analysis, which decides the working capability of the mechanism.

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Shao, Jun Peng, Jian Ying Li, Zhong Wen Wang, and Gui Hua Han. "Research on Electro-Hydraulic Load Simulator Based on Building Model of Flow Press Servo Valve." Advanced Materials Research 129-131 (August 2010): 213–17. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.213.

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The model of flow press servo valve is built in this paper, during building the model, the author emphatically analyses the flow equation and force (torque) balance equation of every part of the valve, at the same time, all levels sub-models are organic combined according to power flow direction, signal flow direction of elements and causality, then we get the bond graph model of the flow press servo from this way. Adapting flow press servo valve and flow servo valve to concurrently control load system has its great advantage in restraining the superfluous force of the electro-hydraulic load simulator system, the performance such as load precision of system is enhanced greatly according to this method. Based on the system bond graph model, and by comparing the simulation curves and experiment curves, we can know that the simulation curves basically tally with the experiment curves, the bond graph models are validated right, which are flow press servo valve bond graph model and double valves concurrently control the electro-hydraulic load simulator system bond graph model. Simultaneity, the bond graph models in this paper take on generality, they are can be used on other aspects, such as other valve controlling cylinder system simulation, design and control strategy theory research.

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Gao, Jun, Guo Yi Yan, Gen Yun Peng, and Guan Nan Xi. "Experiment Study on Performances of Servo Pump Used in Hydraulic Press Machine." Advanced Materials Research 516-517 (May 2012): 892–95. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.892.

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As we known, the energy efficiency of pump-control system is higher than valve-control system. So, using pump-control system to replace valve-control system has a positive meaning to improve the energy efficiency in hydraulic press machine. In order to research the performance of servo pump used in hydraulic press machines, the present study is conducted. First, a test bench for comparison of pump-control and valve-control system is established. In this test bench, the pump of former valve-control system and the servo pump are settled. These two pumps are switched by solenoid to supply oil for the hydraulic system. Then, host PC, target PC, I/O board and other hard-wares are connected. Soft-wares and the corresponding driver board are applied to collect data. In order to test the performances of the pressure, velocity and displacement under the condition of the valve-control system and pump-control system, the two systems are tested with the same working conditions. The performance of repeatability and energy efficiency are also obtained. The results show that it’s feasible to apply servo pump to hydraulic press machine. And under the pump-control condition, the velocity and pressure performance of press machine is more stable.

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Zheng, Hong Bo, and You Song Sun. "Research on Pump-Controlled Servo Hydraulic Press and its Energy Consumption Experiments." Advanced Materials Research 988 (July 2014): 590–96. http://dx.doi.org/10.4028/www.scientific.net/amr.988.590.

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A solution was proposed to reform the traditional hydraulic presses by the technology of pump-controlled servo hydraulic power: PMSM(Permanent magnet synchronous servo motor ) and fixed displacement pump replaced the traditional inductive motor and fixed displacement pump as the power unit ; the electromagnetic reversing system, the rapid cylinder and the prefill system were kept; displacement sensors, pressure sensors and a proportional relief valve were added to the hydraulic system. A deep drawing process was taken as an example to analyze the energy consumption by experiments. The results indicated that in the same conditions the pump-controlled servo hydraulic press reached more than 20% energy saving effect in comparison with the traditional hydraulic press and had higher power factor. The main reasons for energy saving are the PMSM has higher efficiency and power factor, and the overflow loss, the standby loss are decreased.

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