Journal articles: 'Press-hydraulic method'

1

Zhu, Peihao, Lianhong Zhang, Rui Zhou, Lihai Chen, Bing Yu, and Qizhi Xie. "A Novel Sensitivity Analysis Method in Structural Performance of Hydraulic Press." Mathematical Problems in Engineering 2012 (2012): 1–21. http://dx.doi.org/10.1155/2012/647127.

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Sensitivity analysis plays a key role in structural optimization, but traditional methods of sensitivity analysis in strength and stiffness are time consuming and of high cost. In order to effectively carry out structural optimization of hydraulic press, this paper presents a novel sensitivity analysis method in structural performance of hydraulic press, which saves a great deal of time and design costs. The key dimension parameters of the optimization of design variables, which remarkably impact on the structural performance of hydraulic press, are efficiently selected. The impact order of various sensitivity parameters in strength and stiffness of machine tools is consistent with the sensitivity ranking of regression analysis. The research results provide the basis for the hydraulic machine design and references in research of machine tools and equipment.

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Zhong, Jun, Kai Zhao, Zhi Feng Liu, and Hong Bao. "Redesign Method of Hydraulic Press’s Moving Beam." Advanced Materials Research 889-890 (February 2014): 198–202. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.198.

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In order to achieve the goal of saving energy and materials, hydraulic sheet metal drawing press are selected as the research objects. Testing technologies are used to obtain hydraulic press's distribution ratio of forming craft's energy consumption so that the importance of moving beam's structure optimization is revealed. Finite element method is used to comprehensively analyze the stress and displacement activity of original beam, mapping out the place of redundant material in the structure. Then, moving beam's structure is optimized by the method of Topology Optimization, and got redesigned on this basis. Thus, the redesigned hydraulic presss moving beam not only satisfies the basic requirement of safety and reliability, but also reduces 433.19 t carbon emissions during the service life of hydraulic press.

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Chen, Hui, Jian Ping Tan, Jin Li Gong, Xian Yue Cao, and Ji Neng Zhou. "Research on Mathematic Model and Measuring Method of Moving Beam Attitude in Large Forging Hydraulic Press." Applied Mechanics and Materials 128-129 (October 2011): 1213–16. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.1213.

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The moving beam of large forging hydraulic press is taken as a research object. A mathematic model of moving beam’s six freedom degrees attitude is established. According to the mechanical feature and special working conditions of large forging hydraulic press, a non-contacted method for moving beam attitude measuring which based on machine vision is proposed. The basic principle and composition of the system are introduced. The system is applied in 300MN large forging hydraulic press, and large amounts of monitoring data are collected which confirm that the measuring method is effective. The research result is helpful for the safety operation and maintenance of large forging hydraulic press.

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Han, Jiang, Hai Jin Huang, Lian Xia, and Hua Zhai. "Fault Diagnosis Method for Automotive Panel Processing Equipment Hydraulic System Based on Rough Sets - Neural Networks." Key Engineering Materials 522 (August 2012): 546–51. http://dx.doi.org/10.4028/www.scientific.net/kem.522.546.

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The application, which the intelligence is used in the fault diagnosis, is the main direction of research currently, especially in the fault diagnosis of large mechanical equipment. In order to improve hydraulic system failure diagnosis of high-speed deep drawing hydraulic press, reduce the efficiency and accuracy of difficulty diagnostic staff. By using rough sets theory combining neural network and the method of large NC hydraulic press, hydraulic system fault diagnosis of diagnosis. This paper established based on rough set - neural network fault diagnosis model, and the following hydraulic cushion hydraulic system as an example, the diagnosis in establishing the fault table based on the rough set theory to fault table attribute reduction and generating rules, will rule input to the BP neural network was trained learning. Get in neural network after the test data repository and simulation. Test results show that the method for the diagnosis of high-speed deep drawing hydraulic press hydraulic system fault is effective.

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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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Li, Z. H., Y. L. Chen, S. Li, and D. S. Bi. "Predict Stiffness of Hydraulic Press with Movable Eccentricity Loading Considering Uncertainty by Monte Carlo Simulation." Materials Science Forum 697-698 (September 2011): 721–25. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.721.

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The stiffness analysis method considering uncertainty parameters of frame hydraulic press with movable eccentricity loading in the early design stage was proposed. The mathematical analytical stiffness of the upper beam with movable eccentricity loading was built. The adaptive Monte Carlo Method was used to calculate the interval of the stiffness with random parameters. The result shows that the stiffness appears higher when the eccentricity increasing. The approach has been tested by measuring the stiffness of a 10000kN frame hydraulic press and a 15000kN frame hydraulic press.

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Zhu, Pei Hao, Lian Hong Zhang, Bing Yu, and Qi Zhi Xie. "Tie Rod Preload Analysis of a 100MN Hydraulic Press." Applied Mechanics and Materials 121-126 (October 2011): 3632–36. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3632.

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The classical preload design method of prestressed frame of hydraulic presses is based on the assumption that the beams of the frame are rigid, which is not agree with practice. In order to eliminate the unbalance load of the frame of a 100MN hydraulic press due to improper prestressing, tie rod preload distribution in prestressing of the frame is researched with respectively mechanics of materials and the finite element methods. According to mechanics of materials and finite element analysis results, reasonable tie rod preloads and sequence of preloading are obtained and the unbalance load of the frame of the hydraulic press is solved. It also provides references for the preload design of prestressed frame of hydraulic presses.

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Yu, H. B., Y. C. Li, and Chun Zhang. "Conceptual Design for Upper Beam of Hydraulic Press." Materials Science Forum 697-698 (September 2011): 414–19. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.414.

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Conceptual design method for the upper beam of the press is proposed. Based on the technical parameters (nominal load and tablesize) and press structural scheme (number and layout of the hydraulic cylinder), simplified mechanical model of upper beam is established and then the conceptual design model is derived. According to the model, conceptual prototype with equivalent moment of inertia of the cross section is achieved. The structure prototype of upper beam is then obtained based on the conceptual prototype by introducing the design rules and experience and solving an optimization model. The method is applied to the structure prototype design of upper beam of a 100MN hydraulic press.

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Huang, Zhi Cheng, and Ze Lun Li. "Studies on the Influence of the Frame Structure’s Deformation of the Automatic Hydraulic Tile Press on Energy Consumption." Applied Mechanics and Materials 103 (September 2011): 41–45. http://dx.doi.org/10.4028/www.scientific.net/amm.103.41.

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The influence of the frame structure’s deformation of the automatic hydraulic tile press on energy consumption has long been neglected. In this paper, a case study in two common beam-column types hydraulic automatic tile press, get the deformations of the columns produced by the tensile by using the finite element method, and then calculate their energy consumption due to deformations. Through analysis and comparison, provide a reference for future design and selection of the hydraulic automatic tile press.

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10

Chen, Hui, Jian Ping Tan, Jin Li Gong, Zhao Qiang Shu, Xian Yue Cao, and Ji Neng Zhou. "Design of New Condition Monitoring System and Data Analysis in Large Forging Die Hydraulic Press." Advanced Materials Research 311-313 (August 2011): 1546–50. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1546.

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The mechanical characteristics and extremely hard working conditions of large die hydraulic press are considered. The limitations of traditional condition monitoring method are analyzed. A new condition monitoring system which consists of a digital and non-contact method for measuring column stress and a digital method for measuring moving beam’s spatial altitude based on machine vision is proposed. The basic principle and composition of the system are introduced in detail. The system is applied in 300MN large forging hydraulic press, and large amounts of monitoring data are collected. Data analysis is carried out. The laws of column stress distribution in different working conditions are found out. At last, some recommendations are proposed which is helpful for the safety operation and maintenance of large hydraulic press.

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11

Li, Chang Bin, Ai Guo Wu, and Chun Yan Du. "Speed Control of Hydraulic Press via Adaptive Back-Stepping." Applied Mechanics and Materials 40-41 (November 2010): 46–51. http://dx.doi.org/10.4028/www.scientific.net/amm.40-41.46.

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This paper is concerned with speed control of hydraulic press system. First, the mathematical model of hydraulic press is derived from its physical characteristics. Then, based on this model, the so-called back-stepping approach is used to design a speed controller. Moreover, in order to overcome the unknown deformation resistance and some other resistance, an adaptive control scheme is introduced to this controller. Finally, a real hydraulic press model is used to validate the proposed method. Simulation results show that the adaptive controller deals with the nonlinearity effectively, and the tracking performance of the system is good.

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Wang, Jicai, and Chen Chen. "A Nonlinear Vibration Compensation Method for Engineering Forging Hydraulic Press Using Tabu Search Algorithm." Mobile Information Systems 2022 (May 2, 2022): 1–10. http://dx.doi.org/10.1155/2022/3731211.

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The research on the nonlinear vibration compensation method in the field of forging hydraulic press is still in the blank stage. This paper studies the nonlinear vibration compensation problem of forging hydraulic press under the action of a kind of nonlinear external system and realizes the increase of a kind of nonlinear vibration in the nonlinear system of a hydraulic press. This paper proposes two methods to solve the nonlinear relationship. One is to concatenate an inverse function of a nonlinear relationship and synthesize it to obtain a linear relationship. While another is to acknowledge its nonlinear relationship and determine its output based on its nonlinear relationship. Furthermore, this paper chooses the tabu search algorithm to solve the compensation problem of nonlinear vibration and improves its search neighborhood to solve the problem of vibration range selection, analyses the vibration reinforcement calculation, and describes the specific steps of applying the tabu search algorithm. Finally, MATLAB is used to simulate and validate the designed method. The simulation results show that the method can suppress nonlinear vibration and the corresponding compensation effectiveness, proving the design method’s rationality.

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13

Xu, Teng, Qinxiang Xia, Xiaoyu Wu, Jiaqi Ran, Feng Gong, and Chunying Lee. "Influence of Hydraulic Domain on Vibration Control and Overload Prediction of High-Speed Punching Press: Multidomain Modelling and Experiment." Shock and Vibration 2019 (September 19, 2019): 1–9. http://dx.doi.org/10.1155/2019/8547104.

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By the multidomain modelling method, the vibration of a high-speed punching press was modelled and simulated, and the influence of the hydraulic system on the vibration of the punching press and the protection efficiency of the punching press under the overload condition was discussed. The multidomain simulation results were compared with the experimental results to the validity of the multidomain model on a punching press with a hydraulic system for vibration reduction function.

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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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15

Wu, Xiao Hong, and Xiao Jun Lin. "Design of the Hydraulic Press Assembling the Coupling Based on the Virtual Prototype Technology." Applied Mechanics and Materials 44-47 (December 2010): 1080–83. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1080.

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In this paper, the hydraulic press to assemble the coupling is designed after its structure characterisdic and work method is introduced. The press mounting device is used to assemble the coupling of a small generator drived by hydraulic oil. In design, the entity model is established using 3D design software Pro/E, and the dynamic and kinimatic characteristics of the virtual prototype of the hydraulic press are simulated in software ADAMS. Thus all kinds of design defects are deleted at the initial stage of the design, the design period can be shorten, the efficiency of design can be raised, and the best and innovative products can be obtatined.

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16

Pan, Yuan. "The Fatigue Life Research on the Crossbeam of Automatic Hydraulic Tile Press." Advanced Materials Research 605-607 (December 2012): 832–36. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.832.

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Taken a certain type of crossbeam of automatic hydraulic tile press as research object, discussed its comprehensive fatigue life by using damnification-limit design method and Finite element. It provided some theory basis and reference for automatic hydraulic tile press’s safe operation and fatigue lift design.

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17

Han, Wen Jia, Da Sen Bi, Sen Li, Ya Bin Guan, and Guang Yang. "Lower Beam of the Heavy Isothermal Forging Hydraulic Press Compare between Rigidity Test and Simulated Result." Applied Mechanics and Materials 577 (July 2014): 166–69. http://dx.doi.org/10.4028/www.scientific.net/amm.577.166.

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Hydraulic press occur elastic deformations in the working status. The deformation will affect the precision of the products. This paper expounds the method of using Laser tracker test rigidity of THP11-10000A isothermal forging hydraulic press. And we test the deformation of the lower bean, fit the date and compare with fitting of the finite element simulation results. The validity and the accuracy of the simulation results are verified.

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Zeng, Yi Shan, and Jun Qian. "Research on Case-Based Reasoning Parametric CAD Design System for Small Hydraulic Press." Applied Mechanics and Materials 37-38 (November 2010): 990–93. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.990.

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In order to satisfy the needs of small hydraulic press enterprises, a case-based reasoning design method is proposed, which introduces the techniques of parametric design, finite element analysis and optimization. The parametric CAD design system for small hydraulic press is developed based on SolidWorks by using VC++. And this system is composed of parametric design, database, finite element analysis and optimization. Customers’ feedbacks show that the parametric CAD design system has greatly enhanced the efficiency of the design.

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Wei, Wei. "Structure Optimization for Hydraulic Press Based on Approximate Model." Applied Mechanics and Materials 442 (October 2013): 287–90. http://dx.doi.org/10.4028/www.scientific.net/amm.442.287.

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A method of structure optimization for hydraulic press is proposed in order to reduce mass while assuring adequate stiffness. Upper beam and lower beam are determined as optimal objects by mass analysis. Key geometric parameters of upper beam and lower beam which have relatively larger impacts on mass and stiffness are extracted as design variables. In order to research relationship between stiffness, mass and design variables, command batch file is built by python language to implement automatic finite element analysis in ABAQUS. Orthogonal experimental design is used to generate samples of design variables. Calculating data are dealed with second order stepwise regression and mathematical model for structure optimization is established by regression equations. The goal of structure optimization is to decrease total mass of hydraulic press while assuring adequate stiffness. Particle swarm optimization is used to solve the mathematical model. The total mass of hydraulic press is decreased by 3.1% and its stiffness is adequate to ensure the forming precision when solving process is finished.

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Singh, U. P., and P. P. Miller. "Design Analysis of a Twin Head Horizontal Hydraulic Press." Journal of Engineering for Industry 114, no. 3 (August 1, 1992): 289–93. http://dx.doi.org/10.1115/1.2899794.

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Because of economical reasons, use of the single or multi-head hydraulic press is finding popularity in recent times in assembly work for automotive parts in particular. As this type of press offers opportunity for large parts to be assembled with ease, their design and performance poses complexity and challenge to press designers in regard to the high precision required by assembly work. This paper deals with the design analysis of a twin head horizontal press using the finite element method. The three-dimensional finite element model, developed for the press, gives quantitative results useful to press designers. Some suggestions are made to improve the stiffness and torsional rigidity of the press.

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Iwański, Marek, Anna Chomicz-Kowalska, Piotr Ramiączek, Krzysztof Maciejewski, and Mateusz Iwański. "The influence of laboratory compaction methods on the physical and mechanical properties of foamed bitumen recycled mixes." Budownictwo i Architektura 13, no. 1 (March 11, 2014): 053–62. http://dx.doi.org/10.35784/bud-arch.1924.

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This study attempts to evaluate the influence of two advisable methods for compacting laboratory specimens of road base recycled mixes with foamed bitumen (MCAS) and bitumen emulsion (MCE). The obligatory regulations for this technology permit fabrication of the specimens using either an impact Marshall compactor or a static hydraulic press. The research showed that the compaction method influenced both the physical and mechanical properties of samples regardless of the type of bitumen binder. What is more, the structure of the material changed after the impact compaction process, which manifested in fact that many of the aggregate particles were crushed in its course. Better strength and resistance to moisture damage was observed in samples prepared in the hydraulic press. This was associated with lower void contents obtained in this compaction method.

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Xu, Wu Jiao, Ke Wei Chen, and Yong Feng Ding. "Structural Optimization on the Hydraulic Press by FEM and Mathematical Programming Algorithm." Advanced Materials Research 291-294 (July 2011): 2579–85. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2579.

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Structure strength and deformation of the preliminary hydraulic press design have been calculated by the finite element method, in which two working conditions have been considered, i.e. the centre-point load condition and the eccentric load condition. To solve the surplus structure strength globally and the localized stress concentration, the combined methodology of mathematical programming algorithm and the FEM has been utilized to redesign the hydraulic press. The optimization result shows that the mass of the press has been reduced greatly and the localized stress concentration has been eliminated. Besides that, the strength and stiffness in the optimized structure still meet the performance requirements.

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Iwański, M., and A. Chomicz-Kowalska. "Evaluation of the pavement performance." Bulletin of the Polish Academy of Sciences Technical Sciences 63, no. 1 (March 1, 2015): 97–105. http://dx.doi.org/10.1515/bpasts-2015-0011.

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Abstract This paper focuses on evaluation of two laboratory-based methods of compaction of foamed bitumen and bitumen emulsion mixes: impact compaction with a Marshall hammer and static compaction using a hydraulic press. The investigated compaction methods were assessed in terms of their impact on the physical and mechanical properties of produced laboratory specimens, including: air void content, indirect tensile strength before and after conditioning in water (ITSdry, ITSwet), tensile strength ratio (TSR), and indirect tensile stiffness modulus (ITSM) at 0°C, 10°C and 20°C. The statically compacted specimens attained higher levels of mechanical properties and resistance to moisture damage, which was associated with a lower content of air voids in the specimens formed using a hydraulic press. Authors present a calculation showing that a mechanistic design based on the laboratory static press compaction method leads to overestimation of fatigue cracking resistance of the road base.

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Rabadán, Adrián, Manuel Álvarez-Ortí, José E. Pardo, Ricardo Gómez, Arturo Pardo-Giménez, and Miguel Olmeda. "A comprehensive approach to pistachio oil production." British Food Journal 119, no. 4 (April 3, 2017): 921–33. http://dx.doi.org/10.1108/bfj-08-2016-0373.

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Purpose The high content of unsaturated fatty acids and the elevated presence of bioactive compounds make pistachio oil a healthy product with great commercial potential. One of the primary constraints for its production is the lack of information regarding oil extraction from an industrial perspective. The purpose of this paper is to ensure the success of pistachio oil production at a commercial scale, attention should be paid to the effect of the main extraction procedures on the characteristics of oil, the consumer acceptance of these oils and their production cost. Design/methodology/approach Comparison and evaluation of the physicochemical and sensory characteristics and production cost of oil extracted using two different production lines (hydraulic press and screw press) are considered here. Findings Slight differences were found in the physicochemical analysis, but significant differences were identified in the sensory analysis. Consumer judges preferred the oil extracted with the hydraulic press. According to production costs, the break-even value that makes screw press extraction sustainable is €70.4 per litre, while for the hydraulic press it is €91.0 per litre, mainly due to a lower extraction yield and the longer extraction time required. As production costs of both methods are high, pistachio oil quality should prevail, making the use of the hydraulic press more advisable. Originality/value Although significant research has been conducted to analyse pistachio oil composition and nutritional value, little attention has been paid to differences that appear regarding consumer preferences and production costs depending on the production method used. This paper provides a comprehensive approach to high-quality pistachio oil production from an industrial perspective.

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Zhang, Xiao Dong, and Jin Jin Zhang. "Dynamic Design of Six-Station Automatic Hydraulic Stretching Machine." Key Engineering Materials 522 (August 2012): 256–59. http://dx.doi.org/10.4028/www.scientific.net/kem.522.256.

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Hydraulic stretch forming is a very important technology. Punch press has achieved multi-station automatic processing in the press area, which has greatly improved the efficiency. However, the main domestic stretching machine is single-stretching hydraulic machine at present. Compared with punch press, hydraulic stretching machines take less space and have better security, but they make less efficiency and have lower degree of automation. Hence, in order to take the advantage of hydraulic stretching machines and enhance the automation level, studies on multi-position automatic stretching machine occupies an important position. This paper proposes a design scheme of Six-station Automatic Hydraulic Stretching Machine (SAHSM) according to the practical production. The overall 3D structure of SAHSM is designed based on Solidworks to prove the theoretical possibility of the program. Then modal analysis is operated based on FEA of the key components of stretching machine module to improve reliability of the product and overcome the disadvantage of the traditional checking method, the first two-order modes are obtained to prove the impossibility of the resonance. At last, ADAMS-based virtual prototype is analyzed to demonstrate the feasibility and effectiveness of the SAHSM dynamic design proposed in this paper

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Zheng, Li Ming, Shen Hua Yang, and Wen Ming Jin. "Dynamic Co-Simulation of Fracture Splitting Machine for Connecting Rods." Applied Mechanics and Materials 20-23 (January 2010): 294–98. http://dx.doi.org/10.4028/www.scientific.net/amm.20-23.294.

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The fracture splitting (FS) method is a bran-new processing technique in the automobile engine connecting rod manufacturing industry, FS is one of three pivotal working procedures, and press speed is one of the key influence factors of FS process. In order to realize parameters of press speed and pull cylinder working pressure, dynamic simulation of hydraulic system has been carried out. Simulation results indicated that press speed of pull cylinder was about 130mm/s, which was between 120mm/s and 150mm/s that was not only good for controlling FS quality, but also not leading irrational design of hydraulic system. The working pressure of pull cylinder was between 10MPa and 14MPa, which was suitable for FS processing. The hydraulic system of FS machine can satisfy the basic requirements of connecting rods FS process. This paper has provided reliable theoretic basis for the design of FS machine for connecting rods.

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Wei, Wei. "Structural Optimization for Upper Beam of Isothermal Hydraulic Press." Applied Mechanics and Materials 423-426 (September 2013): 1936–39. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.1936.

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A method of structural optimization for upper beam is proposed in order to satisfy the requirements of high stiffness and light weight of isothermal hydraulic press. Finite element analysis mold is established in ABAQUS by analyzing structural features and load conditions of hydraulic press. When original structure is retained, stiffness and strength of upper beam are checked based on finite element analysis mold. Key factors influencing stiffness and mass are extracted and analysis results are obtained by experiment design. Mathematical model for structural optimization is established by second order stepwise regression model. The goal of structural optimization is to increase stiffness of upper beam while mass is set as constraint. The stiffness of upper beam is increased by 7.04% and its mass remains unchanged basically when structural optimization is finished.

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Zuliyati, Zuliyati, Edwin Djoenaedi, and Hutomo Rusdianto. "Peningkatan produktifitas proses produksi sampul raport melalui teknologi tepat guna." Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) 4, no. 1 (March 12, 2021): 128. http://dx.doi.org/10.33474/jipemas.v4i1.8996.

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The purpose of this activity is the empowerment of small industries, especially in the cover craftsmen and report cards “GiGa” as service partners. The method used is technology guidance through the application of appropriate technology, assistance in the use of multi-use press machines using hydraulic, e-commerce, financial administration and management assistance. The precise technology of a multipurpose automatic press machine with a hydraulic machine can be used to produce a wide range of quality cover products with an effective and efficient production system. The results of this activity are increasing the ability of independent and resilient partners and increasing the role of the micro industry in development, creating job opportunities, increasing income for cover and report card craftsmen “GiGa” in particular and the country in general, thus realizing a better economy. The output of this activity is an automatic multi-use press machine using hydraulic, effective and efficient production processes, quality cover products.

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Naeem, Moahamed A., Hamdy A. Zahran, and Minar M. M. Hassanein. "Evaluation of green extraction methods on the chemical and nutritional aspects of roselle seed (Hibiscus sabdariffa L.) oil." OCL 26 (2019): 33. http://dx.doi.org/10.1051/ocl/2019030.

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Roselle is one of the valuable plants grown in some regions of Egypt, which is used to make juices or as natural food color additive. Roselle seeds are waste, which can be used as a source of non-traditional oil, nutritious or functional compound. The evaluation of green extraction methods including supercritical CO2 (SC-CO2), screw, hydraulic press comparing to traditional method on oil yield, total phenolics, antioxidant activity (DPPH) and oxidative stability of roselle seeds oil were investigated. Fatty acid composition and tocopherol of the oil were also determined. The results showed that the roselle seeds oil extracted by solvent gave the highest oil content and extraction rate (17.98 and 98.34%, respectively) and the lowest peroxide and acid value. SC-CO2 gave the higher content of alpha, gamma, and delta tocopherol comparing to the other extraction methods. Fatty acid showed that linoleic acid, an essential fatty acid, was dominant followed by oleic and palmitic acids. These fatty acids were higher amounts in oil extracted by SC-CO2, followed by cold-press comparing to solvent extraction. The maximum stability (20 h), higher TPC (22.18 mg GAE/g) and antioxidant activity (DPPH, 65.15) were observed in oil extracted by SC-CO2 followed by hydraulic-press, solvent extraction and finally screw-press. The results revealed that SC-CO2 method is more efficient in determination of total tocopherol, oxidative stability, TPC and radical scavenging activity than the other extraction methods. Cold press extraction methods gave higher oil yield than SC-CO2 and more economically than other methods.

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Widiyarti, Galuh, Andini Sundowo, Euis Filailla, and Joddy Arya Laksmono. "The Mechanically Extraction Process of Gambier (Uncaria gambier Roxb.) from Limapuluh Kota, West Sumatera and Its Antioxidant activity." Journal of Pure and Applied Chemistry Research 9, no. 1 (April 30, 2020): 8–15. http://dx.doi.org/10.21776/ub.jpacr.2020.009.01.509.

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The extraction process from leaves and twigs of gambier (Uncaria gambier Roxb)plant was conducted mechanically by using traditional hydraulic press, conventional screw press, and modified twin-screw press. The leaves and twigs of gambier plant was obtained from traditional farmer in Limapuluh Kota, West Sumatera, Indonesia. The water, ash and catechin contents of the gambier extracts were analyzed based on SNI 01-3391-2000 using spectrophotometry and thermogravimetry method. Antioxidant activity analysis of the extracts was also performed by 1,1-diphenyl-2-picrylhidrazyl (DPPH) method and compared tovitamin C as a standard antioxidant. The analysis results showed that the extracts contain no ash. Meanwhile, the catechin and water contents of the extracts were approximately 50 and 13% thus the extracts were classified as quality gambier 2. Other than that, analysis result of catechin and epicatechin contents of the extracts using HPLC and compared to the reference materials showed that catechins contents of the extracts using traditional hydraulic press, conventionalscrew press, and modified twin-screw press give catechin content in about 94.296-95.030%. However, epicatechin was detected in a trace amount. The antioxidant activity of the extracts were 2.5 times stronger than reference. The IC50 value of 4.37-4.52 µg/mL and was categorized as active antioxidant.

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Kibazoni, Oscar, and Lonaard Damson. "Improvement of Hydraulic Press for Vegetable Oil Expression in Rural Areas." Tanzania Journal of Engineering and Technology 34, no. 1 (June 30, 2013): 55–62. http://dx.doi.org/10.52339/tjet.v34i1.459.

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Cultivation of oil producing crops especially Jatropha and croton as source of vegetable oil for biodiesel production is being encouraged in rural areas. To recover oil from seed, manual press is the feasible method in rural areas where there is no electricity. Research was conducted to improve hydraulic oil press machine for rural application. Factorsaffecting oil recovery were found to be: moisture content of seeds, operating pressure, seed oil content, and the amount of seeds pressed per batch. Percentage oil recovery was improved by reducing diameter of press cylinder, hence increasing expression pressure, and either reducing amount of seed processed per batch or placing disk within the seeds to improve oil flow. The maximum vegetable oil recovered from Jatropha seeds at a pressure of 20.8 MPa after improvement was 57.5% of the total oil in seeds. There was no significant difference in terms of oil recovery between pressing whole seeds or milled seeds. Suggested further improvement includes: higher pressure than 20.8 MPa, reduced radial distance travelled by oil and replacement of hydraulic jack with a self retracting double acting hydraulic power cylinder to reduce batch cycle.

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32

Chang, Qiu Xiang. "Flexible Module Optimization of Hydraulic Press Based on LSRM." Advanced Materials Research 308-310 (August 2011): 2297–301. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.2297.

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Many scholars have developed a lot of flexible modules used on Hydraulic press, but to reduce costs such as the producing cost and the transportation cost, the above modules, formed through continuation, should be optimized before put into the module library. This paper introduces a method which optimizes the continuation body of type YH30 by means of LSRM. And the contrast shows the new nodule has a well effect on optimizing structure and reducing costs and materials.

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Liu, Zhifeng, Yong Wang, Haihong Huang, Xinyu Li, Lei Li, and Dan Zhou. "An Energy Matching Method for Hydraulic Press Group Based on Operation Load Profile." Procedia CIRP 48 (2016): 219–23. http://dx.doi.org/10.1016/j.procir.2016.03.095.

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34

Li, Lei, Haihong Huang, Fu Zhao, John W. Sutherland, and Zhifeng Liu. "An Energy-Saving Method by Balancing the Load of Operations for Hydraulic Press." IEEE/ASME Transactions on Mechatronics 22, no. 6 (December 2017): 2673–83. http://dx.doi.org/10.1109/tmech.2017.2759228.

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35

Huang, Haihong, Xiang Zou, Lei Li, Xinyu Li, and Zhifeng Liu. "Energy-Saving Design Method for Hydraulic Press Drive System with Multi Motor-Pumps." International Journal of Precision Engineering and Manufacturing-Green Technology 6, no. 2 (March 6, 2019): 223–34. http://dx.doi.org/10.1007/s40684-019-00085-6.

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36

Lu, XinJiang, and MingHui Huang. "Novel multi-level modeling method for complex forging processes on hydraulic press machines." International Journal of Advanced Manufacturing Technology 79, no. 9-12 (March 11, 2015): 1869–80. http://dx.doi.org/10.1007/s00170-015-6970-0.

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37

Yan, Xiaopeng, Baijin Chen, Dongwei Zhang, Chengxing Wu, and Wanxian Luo. "An energy-saving method to reduce the installed power of hydraulic press machines." Journal of Cleaner Production 233 (October 2019): 538–45. http://dx.doi.org/10.1016/j.jclepro.2019.06.084.

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38

Yu, Dong Man, Cheng Si Li, Di Wang, and Xiao Jing Li. "Finite Element Analysis for Supporting Structure Based on COSMOS." Applied Mechanics and Materials 556-562 (May 2014): 1151–54. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1151.

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Hydraulic components are key components of hydraulic press, its design quality directly affect the performance of the host and service life. If the improper design, premature failure will cause large economic loss. So the modern design method to structure design, hydraulic components can improve the service life, increase the economic benefit is of great significance. Then Solidworks software is employed to establish the geometric model, through the interface with finite element software input into the finite element analysis software, the corresponding finite element analysis model is established. At last, through the software to the linear static analysis, the model to obtain the mechanical properties of the hydraulic components, it has reference significance to improve the design.

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Li, Xi Ning, Cheng Yu Jiang, and Zhong Qi Wang. "Study for Rectangular Box Drawing of Segmented Variable Blank Holder Force." Materials Science Forum 628-629 (August 2009): 523–28. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.523.

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The sheet forming simulation of rectangular box was conducted by finite element method (FEM), the forming process experiment, further, was investigated, so as to understand the effect of the form of blank holder and the manner of blank holder force (BHF) on the complicated parts forming. In my study, a kind of low carbon steel was investigated, and its mechanical properties were obtained by simple tension tests. The outermost contour of the blank shape was determined by “one step method”. Furthermore, the finite element model was constructed by ANSYS parametric design language (APDL), which has characteristic of grid meshing by Belytschko-Tsay (BT) shell element, applying anisotropic constitutive equation of Barlat yield criterion, dealing contact by penalty function method and using adaptive mesh algorithm in the simulation process. Then the forming process simulation of rectangular box with segmented variable BHF was conducted. On the basis of analyzing the work principle and technical parameters of XP3CEF-100 hydraulic press, the rectangular box drawing system of segmented VBHF was established, which was made of hydraulic press, rectangular box drawing die of segmented blank holder, hydraulic part of blank holder and control part. Finally the low carbon steel forming tests were fulfilled by the rectangular box drawing system on the basis of the simulation result.

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TROPP, Michal, and Ronald BASTOVANSKY. "APPLICATION OF HYDRAULIC CIRCUIT IN MECHATRONIC SYSTEMS." Journal of Technology and Exploitation in Mechanical Engineering 2, no. 1 (December 26, 2016): 5–10. http://dx.doi.org/10.35784/jteme.404.

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This paper focuses on the calculations of basic variables of the hydrostatic circuits in the mechatronic systems. These calculations are important for machines used for forming materials by means of great forces, e.g. hydraulic press. Due to differences in equipment design, lack of a universal method of calculation is noticeable. It is necessary to determine the coefficients required for the calculations in an experimental way.

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41

Deng, Ying Jian, and Z. W. Liu. "Fuzzy Reliability-Based Optimal Design for the Primary Cylinder of Giant Hydraulic Forging Press." Advanced Materials Research 44-46 (June 2008): 545–52. http://dx.doi.org/10.4028/www.scientific.net/amr.44-46.545.

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300MN forging hydraulic press is the essential equipment in our country national defense and the infrastructure, and the primary work cylinder is one important part of the hydraulic press. In view of the judgment on the Working States of the primary work cylinder whether safe existence fuzziness, which has carried on the fuzzy reliability analysis and computation to the primary work cylinder probability law design result and the method of safety coefficient design result, the computed result indicated that, the design result with traditional safety coefficient is conservative, but based on probability design result is not safe enough. At the same time, under the condition that don’t reduce the fuzzy reliability, which has carried on the optimal design based on the finite element software to the thickness of the primary work cylinder.

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42

Hu, Guo Jun, and Zhi Quan Hong. "Design of Cold Extrusion Die for the Precision Gears." Advanced Materials Research 215 (March 2011): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.215.208.

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In this paper, the analysis and method of forming for cold extrusion die of precision gears is analyzed. The basic principle and progress of gear closed forming based on exchanging axles on the common hydraulic press are introduced. The mould structure is introduced.

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Hou, Jiaoyi, Zengmeng Zhang, Hua Zhou, Dayong Ning, and Yongjun Gong. "Hydraulic systems control based on the characteristics of major-motion mechanism for an open-die forging manipulator." Advances in Mechanical Engineering 9, no. 2 (February 2017): 168781401769095. http://dx.doi.org/10.1177/1687814017690959.

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In the open-die forging process, the forging manipulator must cooperate closely with the forging press. Terrible working conditions of open-die forging have resulted in significant demand on the hydraulic control systems of the forging manipulator. This article analyzes the characteristics of major-motion hydraulic systems with the aim of proposing a novel hybrid serial–parallel heavy-duty forging manipulator. Kinematic and dynamic models of the major-motion mechanism are developed to investigate the control and comply with performance of hydraulic lifting, pitching, and buffering systems. Simulation shows that the three hydraulic systems are coupled in the position and posture control of the clamp. A separate posture control method based on the characteristic of the major-motion mechanism is designed for the hydraulic systems, and the position tracking performance of the hydraulic systems is studied in a stretching process of a plat-tool.

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44

Balakin, V. F., S. L. Stasevskyi, V. D, Dobriak, and Yu D. Uhriumov. "Improving the preparation of the liner for rolling on the pilger mill." Metallurgicheskaya i gornorudnaya promyshlennost, №4, 2018, no. 4 (August 2018): 39–44. http://dx.doi.org/10.33101/s04-38748594.

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Purpose. Based on the analysis of the features of the hot piligrim pipe rolling process, develop a new and improved method for preparing liners on the mandrel by compressing their hind ends with specialized strikers of a horizontal hydraulic press. Metodology. The solution to the problem of determining the average specific application on the contact of the liner with the mandrel during compression of its rear end by specialized press dies using the method of slip lines. Findings. The article presents the results of a theoretical determination of the average specific pressure and the width of the contact surface area between the sleeve and the mandrel when the rear end of the sleeve is compressed by specialized strikers of a horizontal hydraulic press. The results obtained allow us to determine the conditions for preventing the liner from slipping from the mandrel as they move toward the rollers in the braking phase. Originality. The main factors affecting the adhesion of the liner to the mandrel were determined, and the values of average specific pressures on the contact of the metal with the mandrel were calculated during the reduction by the profile dies, as well as the width of the contact area and the required thickness of the dies. It has been established that the thickness of the strikers of a double-sided press can be assumed to be the same for all sizes of sleeves of the assortment TPA 5-12 ''. Practical value. The results of the theoretical studies can be used to modernize and reconstruct a section of the off-site charging of a pilger mill TPA 5-12 '' by installing horizontal hydraulic presses with double-die profile dies. This will increase the productivity of the mill by preventing the sleeve from sliding down the mandrel during roll-up to the rolls by creating the necessary adhesion forces between the sleeve and the mandrel. In addition, it will facilitate the conditions of the seed regime piligrim rolling, which will reduce machine time and increase productivity. Key words: pipe, liner, pilgrim mill, hydraulic press, hammer head, mandrel, performance.

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Cai, Shao Qiu, Xu Hong Pan, Feng Nian Li, and Li Li Peng. "Comparison of Three Hydraulic Unloading Schemes for a Screw Press." Advanced Materials Research 418-420 (December 2011): 1717–20. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1717.

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The transient time of the clutch disengagement is of key importance, as far as controlling performance of clutch screw presses is concerned. Therefore the hydraulic unloading of the clutch for a screw press has been analyzed, by which three schemes of poppets were compared based on calculation and simulation. Thereafter we found it is the widely used mode of ‘pilot-main poppet valve’ that had much advantage. At the same time the paper can provide an analysis method and be as the instantiation references for the design of such systems.

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46

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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Yan, Xue Yuan, Ai Qi, Wei Lin, and Su Guo Wang. "Research on Design Method of Combined Steel Lead Energy Dissipation Structure." Applied Mechanics and Materials 71-78 (July 2011): 526–30. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.526.

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Construction and control principle of the new combined steel lead damper (NCSLD) were introduced, pseudo-static tests of NCSLD which would be used in the subsequent shaking table tests were carried out for the study of its mechanical properties using electro-hydraulic servo press-shear machine. Structural seismic design procedure using NCSLD is presented. An engineering example of seismic strengthening using NCSLD is provided. Results of tests and analyses indicate that NCSLD has full hysteresis loops which take on bilinearity; NCSLD is of strong energy dissipation ability and has obvious control effects for structural inter-story displacement and acceleration reactions.

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48

Wei, Wei. "Lightweight Design for Lower Beam of NC Isothermal Hydraulic Press." Applied Mechanics and Materials 470 (December 2013): 463–66. http://dx.doi.org/10.4028/www.scientific.net/amm.470.463.

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In order to satisfy the requirements of light weight and high stiffness for NC isothermal hydraulic press, a method of lightweight design for lower beam is proposed. Key geometric parameters of lower beam affecting mass and stiffness are extracted as design variables. Latin hypercube sampling is used to produce samples of design variables in order to explore relationship between stiffness, mass and design variables. Calculating data are processed with second order stepwise regression and regression equations for stiffness and mass are obtained. Mathematical model for lightweight design is established by regression equations. The goal of lightweight design is to decrease mass of lower beam while stiffness is set as constraint. When lightweight design is finished, the mass of lower beam is decreased by 11% and its stiffness remains unchanged.

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Chen, Qing Lin, and Shao Fen Lin. "Weight Reduction Design Methods of Wring Based on Load Spectrum." Advanced Materials Research 655-657 (January 2013): 340–48. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.340.

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The hydraulic systemic load spectrum of wring has been constructed by time with press and flow rate under deferent working condition on ship. The root mean square value of reel axial torque was calculated by weighted processing and was taken for the basis of the calculation on structure critical load. Based on the block of load spectrum, the virtual fatigue calculation showed the relation about the static strength and critical load block of load spectrum. Keeping the ratio of the static strength and critical load, the force analysis of wring reel aimed to the structure weight reduction by finite element analysis (FEA). The established wholly parametric and weight reduction model of wring structural part had been computed and meets the strength and stiffness requirement. The weight of this reel is reduced by 15.5 kg and lightweight effect is 8%. This method of weight reduction can be used to the reference on the design of hydraulic deck machinery of ship and hydraulic actuation construction machinery.

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Pan, Qing, Ming Hui Huang, and Yi Bo Li. "Modeling and Identification of Friction Behaviors of Hydraulic Forging Press Machine." Applied Mechanics and Materials 328 (June 2013): 77–83. http://dx.doi.org/10.4028/www.scientific.net/amm.328.77.

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A novel modified LuGre friction model is proposed by taking pressure of the cylinders into consideration. And a practical identification method to estimate the parameters associated with the modified friction model is presented. The validity of the modified model is investigated experimentally. It is shown that the modified LuGre model can demonstrate the comprehensive friction behaviors of the forging machine with a fairly good accuracy.

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Journal articles on the topic 'Press-hydraulic method'

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