Relevant bibliographies by topics / Forging valve

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Forging valve'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Forging valve"

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Dworzak, Łukasz, Marek Hawryluk, and Marta Janik. "The Impact of the Lubricant Dose on the Reduction of Wear Dies Used in the Forging Process of the Valve Forging." Materials 14, no. 1 (January 4, 2021): 212. http://dx.doi.org/10.3390/ma14010212.

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The paper presents the results of research on the influence of the settings of lubrication and cooling system parameters (solenoid valve opening time and lubricant feed pressure in terms of its quantity) in order to select the optimal lubricating conditions and thus reduce the wear of the dies used in the first forging operation of the valve forging made of high-nickel steel. Based on the observation of lubrication in the industrial process, it was found that a significant part of the lubricant fails to reach the die cavity, reaching the outside of it, which causes die wear due to seizure resulting from adhesion of the forging material to the tool surface as well as high lubricant consumption and dirt in the press chamber. The authors proposed their own mobile lubricating and cooling system, which allows for a wide range of adjustments and provided with automatic cleaning procedures of the entire system, unlike the fixed lubrication system used so far in the industrial process. First, tests were carried out in laboratory conditions to determine the highest wettability and the lubricant remaining inside the tool cavity. These tests determined the lubrication system parameter settings that ensured that the greatest amount of lubricant remains in the cold die cavity without the forging process. Then, to verify the obtained results, tests were carried out in the industrial process of hot die forging of valve forgings for short production runs of up to 500 forgings. The results were compared with the measurement of changes in the geometry of tools and forgings based on 3D scanning and surface topography analysis with the use of SEM (Scanning Electron Microscope). For the best results (the variant of the setting of the dose and the time of exposure to lubricant), the forging process was carried out with the use of a new tool up to the maximum service life.
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Huang, Zhi De. "Microstructure and Properties of Forging Engine Valve Seat." Advanced Materials Research 335-336 (September 2011): 552–55. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.552.

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Microstructure and properties of Forging high Cr cast iron were investigated according to the requirements for production and application of engine valve seat. It is found that the microstructure of Forging high Cr cast iron consists of tempering martensite, M7C3 carbide and austenite. The strength ,and plasticity and hardness of Forging high Cr cast iron after heat treating is higher than that of centrifugal casting high Cr cast iron. So the Forging high Cr cast iron can meet the application demand of the engine valve seat.
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Dong, Rong Bao, Zheng Chun Li, Wen Xin Xu, and Miao Xie. "Simulation Analysis of Large Forging Equipment Cartridge Valve." Advanced Materials Research 619 (December 2012): 439–42. http://dx.doi.org/10.4028/www.scientific.net/amr.619.439.

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For the purpose of optimizing the dynamic characteristics of large forging equipment multilevel cartridge valves, according to the structure and principle of the Rexroth’s LC series cartridge elements, using AMESim simulation software, the influence of forging equipment cartridge valves switching characteristics be discussed respectively from the damping R2, the damping R1, the load pressure. The results show that the damping R1, the damping R2, the system pressure, and the work load to cartridge valves switching characteristics have certain effect. The research gives a method for analyzing and adjusting the cartridge valve response characteristics.
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Yang, Yang, Li Wen Zhang, Zhi Zhu, and Jian Lin Zhang. "FE Simulation of Die Forging Process for High Pressure Valve Body." Advanced Materials Research 763 (September 2013): 207–10. http://dx.doi.org/10.4028/www.scientific.net/amr.763.207.

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In this paper, based on the finite element (FE) software Deform 3D, the simulation of the die forging process of a high pressure valve body was conducted. The deformation field and the metal flow field of billet were obtained and analyzed in detail. In addition, the effect of upsetting depth on the die forging process of high pressure valve body was also discussed. This study can provide a good guide for the following researches and practical industry.
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Zhang, Jian Lin, Li Wen Zhang, Yang Yang, and Zhi Zhu. "Simulation and Optimization of Die Forging Process for High Pressure Valve Bonnet." Advanced Materials Research 652-654 (January 2013): 2053–56. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.2053.

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In this paper, the multi-stage die forging process of a high pressure valve bonnet was simulated by 3D coupled thermal-mechanical rigid-viscoplastic finite element (FE) method. The deformation and the metal flow field of billet were obtained. Based on the simulation, two optimized schemes were put forward for improving the yield. Both of them can save material and ensure the stability of billet during the forging process. The study can provide scientific theory foundation for practical engineering applications.
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CZYŻEWSKI, P., and A. KOCAŃDA. "Computer modelling of valve lever forging with various preforms." Archives of Civil and Mechanical Engineering 8, no. 3 (January 2008): 33–40. http://dx.doi.org/10.1016/s1644-9665(12)60161-7.

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Gontarz, A. "Forming process of valve drop forging with three cavities." Journal of Materials Processing Technology 177, no. 1-3 (July 2006): 228–32. http://dx.doi.org/10.1016/j.jmatprotec.2006.04.053.

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Pham, D. T., and M. H. Wu. "Diagnosis of Faults in the Fuel Injection System of a Forging Machine Using Fuzzy Sets Theory." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 208, no. 2 (May 1994): 123–29. http://dx.doi.org/10.1243/pime_proc_1994_208_316_02.

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This paper describes a diagnostic system for the fuel injection module in a high-speed forging machine. The system is based on the use of fuzzy sets techniques, with a fuzzy set representing each fault in the module. Empirical membership functions for the different fuzzy sets are employed to locate faults according to conditions observed on the forging machine. Two types of faults can be handled: faults due to one of more valves in the fuel injection module remaining in their unenergized state and faults caused by a valve being stuck in the energized state. Details of the diagnostic methods for both fault types are presented following a brief review of the operating principle of the forging machine.
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Jeong, H. S., J. R. Cho, Nak Kyu Lee, and H. C. Park. "Simulation of Electric Upsetting and Forging Process for Large Marine Diesel Engine Exhaust Valves." Materials Science Forum 510-511 (March 2006): 142–45. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.142.

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The manufacturing process of the exhaust valve in large marine diesel engines consists of an upset forging and final forming process. In the past, the exhaust valves in large marine diesel engines have been made through free forging by using the stretch forming method. This method has used the ingot and the billet as a preliminary forming process. Nimonic 80A, a superalloy, is presently used for the material of the exhaust valve. For the forming method of the valve, the electric upset method is used. Solid bar is raised up to the forming temperature by using electric energy and is continually deformed by upset pressure. The electric upsetting processing is a useful method for the high quality of exhaust valves in large marine diesel engines. It can keep the continuous grain flow, excellent mechanical property, and corrosion resistance because of the elaborate macrostructure of the valve face. The purpose of this paper is to predict the optimum process condition through simulation of the exhaust valve with a diameter of 73mm. The experimental result of an exhaust valve with a diameter of 19mm is in good agreement with the simulation result using the “QForm” that can solve electric upsetting problems. Finally, the optimal manufacturing process of the electric current and the upset load are surveyed.
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Yu, Hai Ning. "The Engine Valve Umbrella Head Hot Forging Die Improvement Measures." Advanced Materials Research 740 (August 2013): 694–97. http://dx.doi.org/10.4028/www.scientific.net/amr.740.694.

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When using monolithic hot die to forge the umbrella head of valve parts, hot die of a short life. Through the analysis of factors caused by mold, the structure design, mold material, mold manufacturing and use to take certain measures, the production practice showed that die fatigue crack generation and extended time to prolong service life, obviously improved.
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Dissertations / Theses on the topic "Forging valve"

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King, Stephen G. (Stephen George) 1974. "Using value stream mapping to improve forging processes." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34772.

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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2004.
Includes bibliographical references (p. 79-81).
Value stream mapping is a technique that uses icons to map the flow of product through a manufacturing system. These icons are aided by summary statistics to further detail the specific manufacturing system. The value stream mapping process usually consists of defining the current state of the system and then, using the principles of lean manufacturing, mapping an improved future system state. Although this is the popular technique, variants and refinements of it exist. This work examines the various techniques of value stream mapping and the methods used to evaluate value stream maps to improve manufacturing systems. The past and current research into value stream mapping and the methods to analyze these maps are compared and contrasted. A set of core analysis questions is developed that summarize the various value stream mapping methodologies. The application of these questions to an enhanced value stream map is developed as a tool, hybrid value stream mapping. Hybrid value stream mapping is then used to analyze the current state value stream map of a manufacturing process, the forging of automotive ring gears. The answers to the core analysis questions enabled the identification of weaknesses in the manufacture of ring gears and suggested system-wide problems. To further clarify and suggest means to rectify these weaknesses, methods beyond the scope of value stream mapping were utilized. By using systems based on standard inventory theory, economic production quantities, techniques to improve information visibility, and methods to enhance production equipment savings of over $4.7 million net present value were discovered for the ring gear production process.
by Stephen G. King.
S.M.
M.B.A.
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Havelka, Milan. "Proces dekomprese v hydraulických systémech tvářecích strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232006.

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This thesis consists of two main parts. The first part is a theoretical analysis, or a literary research, it is focused on the physical properties of the fluid, which have direct impact on the decompression. The aim of the second part is to evaluate the measurement of the forging valve and subsequently simulate the issue by means of CFD. The first simulations were performed for the maximal valve stroke and used for the CFD solver setup calibration. The subsequent analyses dealt with possible openings of the valve. In the final chapter the theoretical impact of the liquid compressibility and of the undissolved air is discussed. The results of the thesis can prove useful for the new valve setting in hydraulic circuit or for possible geometry modification.
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Deshpande, Mayur Nandkumar. "IMPROVEMENTS IN HOT FORGING PROCESS - USING ALTERNATIVE DIE MATERIALS AND FINITE ELEMENT ANALYSIS FOR WEAR PREDICTION AND DIE DESIGN OPTIMIZATION." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1293467038.

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You, Chen-wei, and 游振偉. "Study on the formability of magnesium alloy for valve side cover under hot forging." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/49186518068343976645.

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碩士
國立臺灣科技大學
機械工程系
98
This study investigates the formability of AZ31 and AZ61 magnesium alloy for valve side cover under hot forging. Finite element software, DEFORM, is applied to simulate the forming behaviors. The process parameters of simulation considered in this study are established material mechanical properties, heating temperatures of the sheet, punch speeds, constant friction factor, preform shape of billets. The variation of forming loads and completeness of filling in the die cavity are discussed under different process parameters. The experimental conditions are set according to the optimal simulation results. Hot forging experiments are carried out to study the formability of magnesium alloy for valve side cover. Finally, from the measured result of hardness and metallographic observation of forged part, the influence of forming temperatures on the strengths and microstructures of magnesium alloy for valve side cover under forging process can be evaluated. The experimental results are compare with the DEFORM simulation results. The obtained forging loads and completeness of filling are in good agreement with the simulation results. The validity of the simulation model established in this study can be confirmed.
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Su, Cyun-Fong, and 蘇群峰. "Study on the formability of magnesium alloy for valve cover under hot forging process." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/25436346803715738577.

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碩士
國立臺灣科技大學
機械工程系
98
The study investigates the mechanical properties and forming characteristics of AZ31 and AZ61 magnesium alloys under hot forging. Firstly, finite element software DEFORM is applied to simulate the deformation behaviors of magnesium alloys valve cover under different process parameters. Process parameters considered in the simulation are materials heating temperatures, lubricants and punch speeds. The optimal forging condition can be obtained from evaluation of the completeness of filling of material in die cavity, forming load and stress and strain distribution. From the hardness distribution, material flow pattern and observation of microstructure of forged parts, we try to find out the factor that influence the formability of magnesium alloys valve cover. Finally, by comparing the analytical results of DEFORM simulation and the experimental results. We try to figure out the method that can manufacture valve cover perfectly with low forging load.
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C, Hsieh C., and 謝君政. "The Analysis of the Critical Value for the Mold Design Parameters of the Forward Extrusion Cold Forging Process." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/29856502101638165470.

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碩士
建國科技大學
機械工程系暨製造科技研究所
101
The process of cold forging process is widely used in the industry. The process is fast and has high-precision and high strength. Cold forging process depends critically on the mold design. So how to predict the forming results of the workpieces correctly is the key point of die design of the cold forging process. Forward extrusion process is one of the classical cold forging processes. Whether the workpiece will rupture or overflow in the process is mainly depend on the tapered angle and the section reducing rate. The purpose of this study is to construct the criterion for mold design parameters of the forward extrusion process. We use Solidworks CAD software to generate the figures of molds and workpieces. The material of workpieces is S45C carbon steel. And the material of mold is SKD11. We use “Simufact” forging software to simulate the forging frocesses. Three kinds of tapered angle and five kinds of section reducing rate are chosen to be simulated. The simulation results are exported. And then we use neural network to simulate these results. According to the trained neural network, we can construct a limit curve of parameters for the forward extrusion process. The limit curve of parameters for the forward extrusion process can be checked by some other kind of tapered angle and section reducing rate. The simulation results for those parameters by “Simufact” is consistent with the limit curve. Keywords: cold forging, forward extrusion, artificial neural network.
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Irwin, Sean Michael. "Forging pathways to sustainable food systems and rural poverty reduction: insights from a social and economic value chain analysis of aquaculture in the Bolivian Amazon." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/9699.

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Increasing the social, economic, and environmental sustainability of food systems while making them productive enough to feed a future global population of 9 billion is one of the most significant challenges facing humanity. Aquaculture is touted as a food system that can make a profound contribution to this challenge, but much more research is needed to understand how it can develop sustainably. In central Bolivia, an aquaculture system is emerging that is generating opportunities for empowerment, food security, and poverty reduction. However, pathways that lead to the capture of these opportunities while avoiding challenges are not well defined. It is also unclear how the trajectory of growth can be supported so that aquaculture in the region can sustainably contribute to rural development. The purpose of this study, therefore, was to determine how rural small-scale aquaculture systems can contribute to food production while also being environmentally, socially, and economically sustainable. To do so, a new holistic value chain analysis that incorporates horizontal linkages (gender, food security, poverty analysis, and socio-political context) was developed and utilized. It included semi-structured interviews with 40 central Bolivian aquaculture producers, 40 farmers who did not produce aquaculture fish, 26 people employed in the aquaculture value chain, and 18 aquaculture system key informants. The study found that aquaculture in central Bolivia tends to have a positive effect on system participants and has a low environmental impact. It also identified improvements that the system could make to improve its productivity and sustainability. Beyond the central Bolivian aquaculture system specifically, the research makes an important and valuable contribution to knowledge by identifying and explaining the linkages between local and regional food systems in the global South, and sustainable development outcomes. This research provides insight for development researchers and practitioners looking to improve the productivity and sustainability of aquaculture systems. This research also improves our understanding of how food system development can generate empowerment, food security, and poverty reduction more broadly.
Graduate
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Books on the topic "Forging valve"

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Board, Conference, and Sales Organization Conference (1998 : New York, N.Y.), eds. Forging an effective sales organization. New York, NY: Conference Board, 1999.

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Forgiving and Hopeful (Value Builders). David C. Cook Publishing Company, 1995.

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Eisenberg, Melvin A. Other Limitations on Expectation Damages. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199731404.003.0020.

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Chapter 20 concerns limitations on expectation damages other than the principle of Hadley v. Baxendale and the certainty principle. The most significant limitation is that generally speaking, under the common law each party to a dispute pays its own litigation costs—attorney’s fees, expert fees, and so forth—win or lose. Oher limitations include the time value of forgone gains—especially since even if prejudgment interest is granted, it will generally be at a lower rate than the actual market rate for interest—and the risk of the promisor’s insolvency. Accordingly, a promisee will never be indifferent between performance and damages.
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Watson, Marilyn. Teaching Children How To Be Friends. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190867263.003.0005.

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The skills for forming and maintaining true friendships in which all parties in the friendship benefit are quite complex. Helping students learn to like, value, and respect one another, regardless of their differences, is an important part of creating a caring classroom that benefits the learning and development of all students. Engaging students in activities that help them get to know one another and appreciate their similarities and differences provides teachers with many natural opportunities to teach their students how to interact with others in friendly, caring, and respectful ways. When students learn to work collaboratively with all the other students in the classroom, they not only learn academic skills, but also they also learn the meaning of friendship—that friends listen, help, and forgive.
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Wright, Jennifer Cole, ed. Humility. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190864873.001.0001.

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This volume will explore humility as a virtue from a multidisciplinary perspective. Specifically, we will explore humility within different religious/spiritual traditions, arguing that it involves an appropriate alignment with God and/or a higher spiritual power, one in which we occupy rightful space, have proper self-regard, and receptive intelligence to the living world around us. We will also explore humility more secularly, examining its epistemic value in the development of knowledge, as well as the important role it has to play in politics, competitive activities, and business management, helping us keep our accomplishments in proper perspective, be less self-occupied, and display a willingness to help (and forgive) others. Finally, we will consider whether humility is the most important virtue—foundational to the mature development and expression of all other virtues and to moral exemplarity more generally.
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Scuriatti, Laura. Mina Loy's Critical Modernism. University Press of Florida, 2019. http://dx.doi.org/10.5744/florida/9780813056302.001.0001.

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In Mina Loy’s Critical Modernism, Laura Scuriatti argues that Loy’s corpus of works produces a kind of “critical” modernism, making the case that Loy’s corpus exhibits a skeptical, detached attitude toward its own simultaneous celebration and criticism of modernist aesthetic paradigms. Most modernist works are self-reflexive in this regard, but Loy’s corpus creates for itself a space of dis-affiliation, which combines critique with self-critique, rather than forging a space of rebellion and antagonism. Scuriatti investigates the notions of the masterpiece and the sacred art object, especially in their relation to the market; the figure of the author and the value of authorship; the embattled relationship between art and politics; the artwork's relationship to national language, identity and rootlessness. Scuriatti provides a new, in-depth investigation of specific aspects of the Florentine and Italian context in particular, which have so far been neglected by scholarship. Specifically, attention is devoted to the Florentine avant-garde journal Lacerba, and to the works of Giovanni Papini, Ada Negri and Enif Robert. The volume presents new insights into Loy’s feminism and argues that her texts respond to the rewriting of Otto Weininger’s then widely influential theories in the magazine Lacerba. Drawing on Adriana Cavarero’s, Luisa Muraro’s and Teresa de Lauretis’s claims, this study also rethinks the concept of eccentricity, conceived not as “aberrant”, but as consciously anti-normative, anti-idealistic and self-critical, in relation to modernist aesthetics. It shows that Loy’s texts present dialogic, “narratable,” “eccentric” selves and subjectivities, which create uncomfortable critical spaces within modernism as a broad movement.
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Lister, Matthew. Contract, Treaty, and Sovereignty. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190922542.003.0015.

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It is a common charge that treaties, perhaps especially recent treaties relating to economic activity, provide unreasonable restrictions on the sovereignty of the state parties. When a tribunal judging a dispute on an economic treaty tells a state that it may no longer make decisions such as to accept or reject genetically modified foods, allow internet gambling, or produce generic drugs, the citizens of the state may rightfully think they have lost important aspects of sovereignty to bodies that do not have legitimate authority to govern. This, in turn, makes negotiating treaties, despite their obvious value, much harder than it otherwise would be, leading to decreased cooperation and the forgoing of potentially significant gain. This chapter argues that these worries may be dealt with by importing certain ideas from contract theory and using them to interpret treaties. Contracts have the seemingly paradoxical ability to increase the autonomy of the signers by allowing them to bind themselves to perform certain future actions. But, the ability of contracts to perform this function would be greatly reduced if the only possible remedy for breach were specific performance. Yet, an analogous approach to treaties is common among many important theorists of international law, who demand the equivalence of specific performance in the case of treaties. This chapter will show how importing ideas from contract law can help ensure that treaties, especially economic treaties, are sovereignty-enhancing for states in a way that is similar to the way that contracts may be autonomy-enhancing for individuals.
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Kekes, John. Hard Questions. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190919986.001.0001.

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The hard questions are: Is there an absolute value? Must we conform? Do we owe what our country asks of us? Is justice necessary? How should we respond to evil? Is it right to forgive wrong actions? Is shame good? Should we be true to who we are? Do good intentions justify bad actions? Should moral evaluations be overriding? These questions are hard because each has several reasonable but conflicting answers. Their conflicts show that we are ambivalent about what answer we should give when we have to make important decisions whose consequences affect us, our relationships, and our attitude to the society we live in. The aim of this book is to show how hard questions can be reasonably answered. Comparisons are central to the approach of this book. Each chapter is concerned with two conflicting answers that have been given to one of the hard questions by those who had to face the question in different anthropological, historical, and literary contexts. These comparisons are central to the evaluations of the answers. They enable us to learn from the successes and failures of others how we can form a deeper understanding of the reasons for and against the answers we might give. The comparisons enlarge how we see the possibilities and limits of life. By learning from others, we can decide more reasonably how we should respond to the hard questions we face.
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Book chapters on the topic "Forging valve"

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Jeong, H. S., J. R. Cho, Nak Kyu Lee, and H. C. Park. "Simulation of Electric Upsetting and Forging Process for Large Marine Diesel Engine Exhaust Valves." In Materials Science Forum, 142–45. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-995-4.142.

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Sainio, Liisa-Maija, Sami Saarenketo, Niina Nummela, and Taina Eriksson. "Forging the Link between Business Model and Value Chain Constructs in the Context of an Internationalizing Entrepreneurial Firm — A Case Study." In Firm-Level Internationalization, Regionalism and Globalization, 163–76. London: Palgrave Macmillan UK, 2011. http://dx.doi.org/10.1057/9780230305106_11.

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Marrone, Daniel. "The Rhetoric of Failure." In Forging the Past. University Press of Mississippi, 2016. http://dx.doi.org/10.14325/mississippi/9781496807311.003.0005.

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This chapter considers the frequent revaluation of success and failure in Seth’s narratives, placing him in a Chekhovian tradition of storytelling that is characterized by “the irony of unfulfillment.” An examination of the “rhetoric of failure” – which David M. Ball identifies in the work of cartoonist Chris Ware – is framed by a critical approach that borrows from Francesco Orlando’s study of obsolete objects in literature. For Orlando, the failure of the obsolete body is the failure to function, a failure which is directly related to the passage of time. Many of Seth’s characters value objects precisely because of their age. The twilight, in-between tone of Seth’s work is accompanied by a strong impulse to save. Seth’s work repeatedly depicts an uncertain transmutation: failure develops in the direction of ambivalence, until it ultimately coincides with its opposite. Though such inversions are not stable, failures and obsolete objects are briefly redeemed.
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Wang, Xinyun, Lei Deng, and Jinbo Li. "Residual Stress During Stamping-Forging of 2024 Aluminum Alloy Sheet." In Encyclopedia of Aluminum and Its Alloys. Boca Raton: CRC Press, 2019. http://dx.doi.org/10.1201/9781351045636-140000209.

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Stamping-forging processing can significantly reduce the residual stress of sheet metal parts. First, the variation of residual stress field during stamping-forging processing and the influence of relative bending radii and forming temperature on the residual stresses of stamping-forged V-shaped parts have been studied by finite-element analysis. Then, the stamping-forging processing has been employed in the forming of 2024 aluminum alloy square cups with nonuniform thickness to investigate the effects of process parameters, such as punch radius, die entrance radius, and die corner radius, on the residual stresses of stamping-forged square cups. The optimum process parameters of stamping-forging have been obtained, which can produce square cups with low residual stresses, that is, the maximum residual stress value can be reduced from 190 MPa for deep drawn square cups to around 60 MPa for stamping-forged square cups. Therefore, it is indicated that the stamping-forging processing can significantly reduce the residual stress of sheet metal parts.
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Thackeray, David. "Between Geneva and Ottawa." In Forging a British World of Trade, 48–77. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198816713.003.0002.

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The interwar years marked the completion of attempts to establish a system of preferential trade within the British Empire, and the newly formed Imperial Economic Committee sought to present a modern vision of empire, in cooperation with the League of Nations. However, while Britannic sentiment remained strong in the Dominions, there was a new sense of scepticism regarding the British World’s cohesion and its future economic prospects. The League of Nations also provided new opportunities to challenge Britain’s economic leadership. Understandings of preferential trade were reshaped during the First World War and its aftermath, with increased attention focused on imperial modernization through ‘scientific’ management and the value of grading tariffs to aid relations with ‘friendly’ nations. During the 1930s it became increasingly clear that imperial cooperation could do little to solve key economic problems connected to production and food supplies, which needed to be tackled through broader international agreements.
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Hale, Benjamin. "Return to the Paleocene." In The Wild and the Wicked. The MIT Press, 2017. http://dx.doi.org/10.7551/mitpress/9780262035408.003.0002.

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This chapter introduces the reader to philosophical and ethical inquiry by forging a distinction between descriptive and normative claims, as well as explanatory and justificatory arguments. It utilizes cases of paleontological discovery and climate communication to argue that “catastrophe reasoning” about climate change is not only politically but also ethically problematic. In this respect, it relies on the current climate discussion to frame the general argument criticized in this book: that the mere demonstration of nature’s value is enough to generate obligations to protect nature.
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Apostolou, Dimitris, Gregoris Mentzas, and Wolfgang Maass. "Knowledge Networking for Collaborative Commerce." In Advances in Electronic Business, Volume 1, 183–221. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-381-4.ch007.

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This chapter aims to describe interorganizational “knowledge networks” and demonstrate how they have ushered in a new paradigm of collaborative business by forging links between internal and external knowledge and information resources. The overall aim is to classify and review various approaches in interorganizational knowledge networking whose objectives may span a multitude of needs: from “loose” information sharing that may be not connected to financial transactions between the networking organizations to “tight” knowledge exchanges that are related to commercial transactions and enable the creation of value from leveraging the interchange of knowledge assets.
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"“Proust” Questionnaire." In Nostalgia for the Future, edited by Angela Ida De Benedictis and Veniero Rizzardi, 391–94. University of California Press, 2018. http://dx.doi.org/10.1525/california/9780520291195.003.0060.

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This chapter presents Nono's answers to a variety of questions. Among these questions are: What for you is the greatest disaster? Where would you like to live? What is your idea of perfect happiness? What errors do you forgive most readily? Your favorite heroes in literature? Your best-loved historical figure? Your most popular heroines in poetry? Your favorite painters? Your favorite composers? What qualities do you most value in men? What qualities do you most value in women? Your favorite occupation? Who would you have liked to be? The main trait of your character? What do you value most in your friends? Your greatest mistake? What historical figure do you despise the most?
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Beglin, David. "Unconditional Forgiveness and Normative Condescension." In Oxford Studies in Agency and Responsibility Volume 7, 259–82. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192844644.003.0012.

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This chapter argues that the moral value of unconditional forgiveness is more complicated and constrained than it is often taken to be. When we unconditionally forgive, we engage with someone in a way that doesn’t take seriously their perspective about the meanings and values at stake in our relations with them. Other things being equal, this is problematic; it is normatively condescending, belittling the place of the other person’s moral agency in our relations with them. This doesn’t mean that unconditional forgiveness is always bad or impermissible. It does, though, complicate how we should think about its moral value.
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Pettigrove, Glen. "Fitting Attitudes and Forgiveness." In Forgiveness and Its Moral Dimensions, 57–82. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780190602147.003.0003.

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In philosophical discussions of wrongdoing, it is common to find people saying things such as, “If a person has been wronged, she should resent the wrongdoer.” Writers don’t always say why, but, if one wished to defend the claim, a promising place to turn would be to fitting attitude theories of value: One should feel anger or resentment, because that is the fitting (or accurate) response to wrongdoing. Fitting attitude theory can also help explain why some reasons for forgiving strike us as the wrong kinds of reasons. However, in spite of its attractions, I argue that fitting attitude theory fails to support the claim that those who have been wronged should be angry or resentful rather than forgiving. The argument highlights gaps that must be filled by any theory that attempts to move from judgments of fittingness to full-blown moral judgments.
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Conference papers on the topic "Forging valve"

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Hu, Jin-Hua, Shi-Peng Shi, Yun-Lai Ren, and Zhong-Hai Yu. "Multidirectional Forging Simulation Research on a Tee Joint Valve." In 2015 International Conference on Material Science and Applications (icmsa-15). Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/icmsa-15.2015.196.

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Jeong, H. S. "Microstructure Evolution of Superalloy for Large Exhaust Valve during Hot Forging." In MATERIALS PROCESSING AND DESIGN: Modeling, Simulation and Applications - NUMIFORM 2004 - Proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP, 2004. http://dx.doi.org/10.1063/1.1766606.

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Komatsu, Shunsaku, Shigeo Yahata, Kazuhiro Fukui, and Teruhiko Tokoshima. "Development of Aluminum Alloy Roller Type Valve Rocker Arm by Casting and Forging Technique." In SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1989. http://dx.doi.org/10.4271/890554.

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Chen, Guanyu, Yin Zhang, Li Ji, Rui Hou, and Jiangang Chang. "Study on new control system of electro-hydraulic proportional valve-control fast forging press." In 2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2016. http://dx.doi.org/10.1109/iciea.2016.7603588.

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Zhu, Muzhi, and Shengdun Zhao. "Dynamic Simulation of a Direct Drive Reversing Valve Based on the Hydraulic Die Forging Hammer." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66024.

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The direct drive reversing valve is designed in this paper to replace the main reversing valve of the hydraulic die forging hammer system, and a new drive method based on TPMLM (tubular permanent magnet linear motor) is suggested. To verify the feasibility of the drive method, the fluid force suffered by valve core is calculated by using control volume method. After that, force analysis is carried out on the valve core. Based on FLUENT, the flow field analysis inside the valve is conducted. And then theoretical calculation and simulation on the fluid force analysis are discussed. TPMLM (tubular permanent magnet linear motor) is selected as the driving device and it is analyzed by Maxwell 2D. The simulation results of TPMLM show that the magnetic flux density, back electromotive force and output force satisfy the requirement of the reversing valve.
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Zhu, Muzhi, Shengdun Zhao, and Peng Dong. "Modeling and simulation of a direct drive reversing valve for the hydraulic die forging hammer." In 2016 IEEE/CSAA International Conference on Aircraft Utility Systems (AUS). IEEE, 2016. http://dx.doi.org/10.1109/aus.2016.7748048.

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Cheng, Wing L. "Bulk Forming Simulation on High Performance Computers." In ASME 1994 International Computers in Engineering Conference and Exhibition and the ASME 1994 8th Annual Database Symposium collocated with the ASME 1994 Design Technical Conferences. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/cie1994-0452.

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Abstract Modeling of complicated three-dimensional bulk forming processes remains a challenge to scientists and engineers. Not only does it require a good mathematical model which gives an accurate geometric representation of the dies and the work-piece to capture the physics of the forming processes, it also needs the appropriate computers to carry out different parts of the modeling effort including the numerical simulation. This paper describes our experience on a computer analysis of a three-dimensional multi-stage forging process using an explicit finite element program and a combination of graphic workstations and supercomputers. A three-stage forging of a valve body was used to illustrate the simulation process. A Scalar Graphic Workstation was used in geometric modeling, numerical calculations for the first two stages of the forging process when a coarse model was adequate, and post-processing of the results. A CRAY Y-MP Supercomputer was required to simulate the third stage of the forging process when a fine mesh was needed to capture the details of the material flows. Data transfer was accommodated by a full T-1 communication line between the supercomputer and the workstation. The availability of the advanced software tools and these computer resources provides us the ability to model an entire range of bulk forming problems.
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Dong, Peng, Shengdun Zhao, Yongfei Wang, Peng Zhang, Xiaolan Han, Chen Liu, Dean Meng, and Yuanzhe Dong. "Design and Experimental Study of Radial Piston Pump With Valve Plate Distribution." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11286.

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Abstract In the field of forging machinery and construction machinery, the hydraulic transmission has become the preferred transmission mode for its high efficiency. The hydraulic pump is the core component of the transmission system as the power component. It is also the main research focus in the field of hydraulic transmission in recent years. According to the axis direction of the piston and the drive shaft, the piston pump can be grouped into radial piston pump and axial piston pump. There are two shafts in the conventional radial piston pumps, which are distribution shaft and drive shaft to complete distribution the pump and transmission work, and the friction between the shoes and the stator is high for its high load and relative sliding speed. In order to reduce the impact of these drawbacks on pump performance, a valve plate is designed to distribute the oil to avoid the stress of the conventional distribution shaft in this paper. The working principle of the radial piston pump is discussed. An electro-hydraulic proportional servo control system was adopted to control the displacement of the pump. The design and manufacturing of the radial piston pump were completed. A test platform is carried out to test the performance and the variable displacement control system of the radial piston pump with a good test result. The radial piston pump has a certain novelty in structure and has practical value.
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Morgan, Michael J. "Effect of Hydrogen Isotopes on the Fracture Toughness Properties of Types 316L and 304L Stainless Steel Forgings." In ASME 2019 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/pvp2019-93702.

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Abstract Forged stainless steels are commonly used for the containment of hydrogen isotopes and fracture toughness properties are needed for structural integrity assessments. In this study, the effects of hydrogen and tritium precharging on the fracture-toughness properties of Types 316L and 304L stainless steel forgings were measured. The purpose of the study was to evaluate hydrogen and tritium effects on fracture toughness properties of: (1) Type 316 stainless steel stem-shaped and cup shaped forgings; and (2) Type 304L cylindrical block forgings with two different yield strengths. Arc-shaped fracture toughness specimens were cut from the forgings and precharged by exposing the specimens to hydrogen or tritium gas at 623K and 34.5 MPa. Tritium precharged specimens were aged at 193 K for 45 months prior to testing to build-in helium-3 from tritium decay. In the as-received condition, the J-Integral fracture toughness of the stem, cup, and block forgings were very high and exceeded 1200 kJ/m2 on average. The fracture toughness of specimens cut from the low yield strength Type 304L stainless steel block forging had the highest fracture toughness values and Type 316L stainless steel cup forging had the lowest. The reduced fracture toughness values were attributed to the large strain required to produce the cup forging and its high yield strength. Hydrogen precharging reduced the fracture toughness of the stem, cup, and block forgings to values between 34%–51% of a baseline value which was taken to be the fracture toughness value of the low yield strength block forging. Tritium precharging reduced the fracture-toughness values more than hydrogen precharging because of the effects of helium from radioactive decay of tritium. The fracture-toughness properties of tritium-precharged forgings ranged from 12% to 23% of the baseline values. In general, Type 316L stainless steel was more resistant to toughness reductions by hydrogen or tritium (and decay helium) than Type 304L stainless steel. Yield strength had only minor effects on fracture toughness for the precharged steels.
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Maitra, Debajyoti, and Phani P. Gudipati. "Stainless Steel Extrusions and Product Properties for High Pressure-High Temperature (HPHT) Applications." In ASME 2018 Symposium on Elevated Temperature Application of Materials for Fossil, Nuclear, and Petrochemical Industries. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/etam2018-6704.

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Extrusion process produces semi-finished product that provides significant savings in machining and fabrication of the finished components. Plymouth Engineered Shapes (PES) employs forward extrusion techniques to produce products up to 40 feet long that are utilized in power generation, nuclear, and petrochemical applications where it is critical to meet or exceed ASME piping, boiler and pressure vessels code specifications. The extrusion process has been successfully employed to manufacture components such as various types of valve bodies, manifolds, adapters and more that are targeted for elevated temperature applications up to 1200°F and under high pressures up to 10,000 PSIG. Critical product characteristics include flatness, straightness, twist, angularity, surface quality and dimensions over the full length. This paper presents an overview of the carbon steel and stainless steel extrusion process, the room temperature and elevated temperature mechanical properties, metallographic characterization, testing requirements and the applications of such products. Properties are also be compared to those produced by the conventional hot rolling and forging operations.
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