Готові списки джерел за темами / Welding generator

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Добірка наукової літератури з теми "Welding generator"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Welding generator"

1

Ji, Ling. "Control System Design Based on MSP430 Microcontroller." Advanced Materials Research 1030-1032 (September 2014): 1438–41. http://dx.doi.org/10.4028/www.scientific.net/amr.1030-1032.1438.

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Single-chip microcomputer MSP430F44 is the core control chip of the multifunction TIG welding controller, MCU is produced by TI and 16-bit flash type, the chip control system uses C430 language to modular software programming, coordination with other subroutines by the main program module , through a simple interface conditioning circuitry on a TIG welder can achieve a variety of welding processes, the welding flexible demand is satisfied. One of the most important module of the welding current waveform generator module, the welding waveform parameters are automatically generated by two way, one is the welding methods, the other is the welding parameters, then judge the input signal of the welding gun, when the gun is pressed, the corresponding waveform output; the welding current waveform output can be achieved using this software, is displayed on the welding current waveform generator.
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2

Kardyś, W., A. Milewski, P. Kogut, and P. Kluk. "Universal Ultrasonic Generator for Welding." Acta Physica Polonica A 124, no. 3 (September 2013): 456–58. http://dx.doi.org/10.12693/aphyspola.124.456.

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3

Kardyś, W., and A. Milewski. "Efficiency Measurements of Ultrasonic Generator for Welding." Acta Physica Polonica A 128, no. 2 (September 2015): 456–61. http://dx.doi.org/10.12693/aphyspola.128.456.

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4

Dzendubaev, A.-Z. R. "Asynchronous welding generator with condenser self-excitation." Welding International 19, no. 1 (January 2005): 73–74. http://dx.doi.org/10.1533/wint.2005.3415.

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5

Marin, Robert Cristian, Iulian Ştefan, Răzvan Ionuţ Iacobici, and Sorin Vasile Savu. "Preliminary Research for Development of MW-TIG Hybrid Welding System." Advanced Materials Research 1164 (June 23, 2021): 9–15. http://dx.doi.org/10.4028/www.scientific.net/amr.1164.9.

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Анотація:
The paper aims to report preliminary researches towards to development of new hybrid welding system by coupling a microwave beam with a TIG torch. The main research was focused on the designing of hybrid system as well as to establish the heating/welding mechanism by coupling two different thermal sources. Therefore, a specific welding chamber was designed taking into consideration the limitations provided by microwave waveguide technical specs, geometrical shape and dimensions of the TIG torch as well as the temperature monitoring during welding process and video surveillance for data recording. A microwave generator with adjustable power from 0 to 1250 W was coupled with a TIG torch and welding power source in order to establish the main parameters for hybrid system. The preliminary researches reported that the MW-TIG hybrid welding could be applied to eutectic joining of materials using low power (up to 600 W) injected from microwave generator as well as low welding current (up to 20 A). The flow of shielding gas have been established initially to 2 l/m. The research related to stabilization of MW-WIG plasma arc have been studied by increasing the flow of shielding gas up to 10 l/m. The results have shown that the microwave generator and TIG torch can be coupled to obtain hybrid-welding process without any matching tuning devices but with risks for damaging the microwave generator. Further researches will be done in order to design auxiliary devices to optimize the hybrid-welding process and to avoid any unwanted plasma arc discharge from welded base materials to microwave generator. In terms of temperature monitoring, an infrared pyrometer has been used. The IR pyrometer was targeted to the base materials in order to be able to measure their temperature without any influences from plasma arc. The results obtained have shown a stable plasma at average microwave power around 400 W even without any TIG current.
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6

Kravcova, E. G., Yu F. Kaizer, V. S. Tynchenko, S. Ch Mongush, S. N. Katargin, and P. Yu Vaitekunaite. "Device for connecting elements of main oil and gas pipelines using electron beam welding." Journal of Physics: Conference Series 2094, no. 4 (November 1, 2021): 042014. http://dx.doi.org/10.1088/1742-6596/2094/4/042014.

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Abstract The article deals with the problem of connecting pipelines in the oil and gas industry. To improve the quality of welds on the oil pipeline, the article proposes an alternative method of welding and venting the beam into the atmosphere. This method includes a mobile installation for electron beam welding, in which, in manual mode, it is possible to adjust the seam speed, penetration depth, change the trajectory of the weld and the position of the installation relative to the pipe axis. Guns with a plasma cathode, which allow welding products in the atmosphere, are considered. The power of the generators is also calculated, and the generators are selected corresponding to the put forward requirements. In the course of the work, the authors are designing an electron beam welding unit, which in the future is planned to be developed as a mobile one. The mobile installation includes: a generator directing the belt to the pipe, a horizontal displacement motor, a welding positioner, an electron gun with a plasma cathode.
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Sharonov, N. I., and M. G. Sharapov. "Modernization of digital beam welding scanning." Voprosy Materialovedeniya, no. 2(94) (January 10, 2019): 161–66. http://dx.doi.org/10.22349/1994-6716-2018-94-2-161-166.

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Анотація:
Instead of outdated GUR-1, scanning electron beam control generator, a modernized system is proposed using digital beam control along special semi-elliptical welding trajectory. The new system has successfully passed approbation when welding aluminum on an ELU-20.
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Gandy, D., G. Frederick, and K. Coleman. "Repair welding technologies for heat recovery steam generator tubing." Energy Materials 1, no. 2 (June 2006): 127–35. http://dx.doi.org/10.1179/174892306x99714.

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9

Shen, Yu Long, Ji Pu Liu, Yi Xin Shi, Bo Dai, Liang Su, and Wen Bo Ma. "Study on the Residual Stress Test of Welded Joints for Wind-Driven Generator Base and Numerical Analysis." Applied Mechanics and Materials 127 (October 2011): 549–54. http://dx.doi.org/10.4028/www.scientific.net/amm.127.549.

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Анотація:
In order to know the concrete distribution of welding residual stresses in Megawatt wind turbine’s basis, Msc.Marc codes by finite element method were applied to simulate temperature and stress field of the base’s welded joints which were appeared on the screen by 3D real-time dynamic numerical, the distribution of welding temperature field and the residual stress is obtained and then the test results of welding residual stress are checked by Blind-hole method. The welding residual stress in the condition of anneal and non-anneal was comparatively analysed. The results show that the transverse and longitudinal residual stresses in the area near the weld are comparatively larger, and the variation trend of the transverse and longitudinal residual stresses in the area far away from the weld are nearly the same. It means that the FEM determination results coinciding with test results are available for reference to the design of the Wind-driven generator welding structure.
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10

Guo, De Peng, Xiao Ming Qian, Mao Lin Li, Wen Guang Zhang, Hong Wei Cai, and Gang Jin. "Examination and Repair on the Tube-Tube Sheet Welding Deviation of Steam Generator." Advanced Materials Research 803 (September 2013): 404–8. http://dx.doi.org/10.4028/www.scientific.net/amr.803.404.

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Tube-Tube sheet welding area of Steam Generator is one of the most fallibility positions in the first loop of Nuclear Power Plant. To make sure the Secondary side hydro-test of on site of Steam Generator is successful at the first round, the relative parties organize to check the 8948 Tube-Tube sheet sealing welding area before the test. Through the introduction of the Checking progress, for example, Defect confirming, Defect location, Defect dealing, Defect repair and other progress, the basic reason of deviation has been analyzed. And also, some discussions and concerns were given which will very useful as an experience feedback.
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Дисертації з теми "Welding generator"

1

Любарський, Борис Григорович. "Моделювання та розробка комбінованого збудження зварювальних генераторів постійного струму з метою поліпшення їх техніко-економічних показників". Thesis, НТУ "ХПІ", 2001. http://repository.kpi.kharkov.ua/handle/KhPI-Press/5320.

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Анотація:
Дисертація присвячена питанням підвищення ККД зварювальних генераторів постійного струму. З метою підвищення ККД запропонована нова комбінована електромагнітна та магнітоелектрична система збудження зварювального генератора. Розроблена методика розрахунку електромагнітних характеристик генератора за результатами розрахунку магнітного поля методом скінчених елементів. Проведено аналіз впливу торцевих полів розсіювання на адекватність моделі постійного магніту прийнятої при розрахунку магнітного поля. Розроблена математична модель залежності усталеності горіння дуги від довжини повітряного зазору та струму збудження. Створена загальна схема розрахунку зварювального генератора. Розроблено та створено експериментальний зварювальний генератор з комбінованим збудженням та проведено його випробування. Створена модель дослідного зварювального генератора.
The dissertation is devoted by a problem of increase efficiency of welding generators of a direct current. With the purpose of increase efficiency the offered new combined electromagnetic and permanent magnet system of excitation of the welding generator. The design procedure of electromagnetic characteristics of the generator on results of calculation of a magnetic field is created by a method of final elements. The analysis of influence of face fields of dispersion on adequacy of model of a constant magnet accepted is carried spent at calculation of a magnetic field. The mathematical model of dependence of stability of burning of an arch from length of an air backlash and a current of excitation is developed. The general circuit of calculation of the welding generator is created. The experimental welding generator with the combined excitation is developed and created and its tests are carried spent. The created model of the experienced welding generator.
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Weimann, David Herbert. "A study of welding procedure generation for submerged-arc welding process." Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317488.

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3

Farjad, Shervin. "Analysis of metal vapour generation by laser ablation." Access electronically, 2007. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080325.110711/index.html.

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4

LANGENOJA, MARKUS, and KARLSSON VINCENT ÖHRVALL. "Next generation high productivity submerged arc welding." Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148055.

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Анотація:
The task of designing concepts for the next generation of submerged arc welding heads was given by ESAB. ESAB is a global company manufacturing welding equipment for a wide span of industries and uses. In October 2011, ESAB introduced a new technology called Integrated Cold Electrode™, abbreviated and trademarked as ICE™. ICE™ is a technique which utilizes three electrodes in a highly productive and stable process. The current state of the ICE™ technique focuses on welding thick plates with conventional joint types such as x- and v-joints. The next phase in the development of the technique is to be able to weld milled 16/8°-joints which are developed by German company Graebner. This kind of joint determines the requirements of the next generation of ESAB’s equipment for submerged arc welding.Simultaneously as designing the welding torch being able to weld the 16/8°-joint, a concept for a highly customizable modular head was developed enabling the possibility to tailor the submerged arc welding process according to the customer’s precise needs.A progressive conceptual development has been conducted in close collaboration with ESAB. Theoretical models have been developed to evaluate thermal-electric behavior of the welding torches to obtain plausible dimensions for the electric conductors to withstand the effects caused by joule heating. Deliverables for the project has been well defined 3D CAD-models while a prototype was not included in the scope of the project.One concept for the 16/8° joint is presented as the Narrow Joint Concept, NJC, which fulfills the requirements specified. The NJC is developed with focus on smart design with low manufacturing cost as well as ease-of-use for the operator. NJC brings ICE™ into narrow joints.The Modular Head Concept, MHC, presents an idea how to create a fully customizable process with the possibility to emulate the ICE™ technique
Uppdraget att utveckla nästa generation pulverbågsutrustning gavs av företaget ESAB. ESAB är ett globalt företag som tillverkar svetsutrustning för ett brett spann av branscher och användningsområden. I oktober 2011 lanserade ESAB en ny teknik vid namn Integrated Cold Electrode™, ICE™. ICE™ är en teknik som utnyttjar tre stycken elektroder i en högproduktiv och stabil svetsprocess. I dagsläget fokuserar ICE™-tekniken på att svetsa konventionella fogtyper såsom x- och v-fogar i tjocka plåtar. Nästa fas i utvecklingen av tekniken är möjligheten att svetsa frästa 16/8°-fogar som det tyska företaget Graebner utvecklar. Denna typ av foggeometri ger kraven för ESAB’s nästa generation pulverbågsutrustning.Simultant togs koncept fram för att möjliggöra skräddarsydd utrustning efter kunders specifika processbehov.En progressiv konceptutveckling har utförts i nära sammarbete med ESAB. Teoretiska modeller har tagits fram för att utvärdera de termo-elektriska egenskaperna hos de utvecklade svetshuvudena så att dessa kan motstå den resistiva uppvärmningen som sker i de elektriska ledarna. Då en prototypframtagning ej låg inom ramen för arbetet har detaljerade 3D CAD-modeller producerats.Konceptet för 16/8°-fogen kallas Narrow Joint Concept, NJC, och uppfyller de uppställda kraven. NJC är framtaget med fokus på smart konstruktion där låg tillverkningskostnad och enkel användning har premierats. NJC sammanfogar ICE™ och smala fogar.Det modulära konceptet kallat Modular Head Concept, MHC, representerar en idé för att skapa skräddarsydda lösningar efter kunders behov. MHC äger förmågan att fungera som ett ICE™-huvud.
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Abu, Bakar Nooh. "ESWELPD : an expert system for the generation of welding procedure of arc welding processes." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/33209.

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The research is focused on the development of an expert system to generate welding procedures for arc welding processes. The system has been developed on an IBM AT microcomputer, using an expert system shell KES (Knowledge Engineering System), a product of Software Architecture & Engineering Inc. The system is primarily intended for novice users, hence good 'help' facilities and graphical representations are provided in the system.
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Guendouze, Cheikh. "Computer assisted generation of parameters for resistance spot welding." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319943.

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7

Dawson, Huw. "Friction stir welding of ODS steels for future generation nuclear reactors." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/friction-stir-welding-of-ods-steels-for-future-generation-nuclear-reactors(2603016f-6763-43d1-98ef-753e110b8791).html.

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In this project, we have successfully joined MA956 Oxide Dispersion-Strengthened (ODS) steel plates using Friction Stir Welding (FSW). ODS steels are prime candidate materials for the fuel cladding in Generation IV nuclear fission reactors and as first wall components in nuclear fusion reactors. This is due to their exhibiting excellent high temperature strength and creep behaviour, together with enhanced resistance to radiationinduced void swelling. ODS steels are heavily reliant on a fine dispersion of (Y-Al-O) nanooxide particles to provide the aforementioned properties. This, however, makes ODS steels particularly problematic to join. Most joining techniques melt the material along the joint line, but this would severely alter or deplete the nano-oxide dispersion and hence be highly detrimental to the material’s performance in a nuclear environment. FSW is a solid-state joining technique, and therefore can join ODS steel without melting the material. Although FSW can potentially alter the microstructure of the base material and affect the distribution of nano-oxide particles, if a sufficient number of nano-sized particles and a sufficiently homogeneous dispersion remain after the welding process, then a major roadblock for the implementation of ODS steels will have been removed. The research of this thesis focused on the impact of FSW on: i) the microstructure, ii) the mechanical properties, iii) the residual stresses, and iv) the abnormal grain growth behaviour of ODS steels; utilizing a wide array of techniques to assess the micro-to-nano scale structure and the properties of the base material and welds, including optical, scanning and transmission and electron microscopy, X-ray and neutron diffraction, small-angle neutron scattering, tensile testing and micro-hardness measurements. We also produced welds with systematic changes to the tool traverse speed and rotation speed to investigate the impact of changing the welding parameters on the weld microstructure, and therefore optimise the process parameters for enhanced radiation and mechanical performance of the ODS steel welds.
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Livingston, Richard Verile. "Comparison of Heat Generation Models in Finite Element Analysis of Friction Welding." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7686.

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Finite element models of friction welding can be used to estimate internal conditions of welds which are useful for weld analysis and developing experimental welding procedures. Many modeling techniques are used to accomplish these goals, each with relative strengths and weaknesses. A comparative analysis of friction welding models using different heat generation methods is presented. The three different heat generation methods examined were viscoplastic friction, constant steady-state generation, and experimentally measured power data. The models were compared against each other using three output measurements: temperature, axial force, and upset. The friction model predicted temperatures within 40 degrees C. Temperature accuracy improved at a higher upset rate and higher spindle speed, when weld samples heated up faster. The model was excellent at predicting upset, with accuracy within 1.5%. Maximum force was predicted within 9-18%. The constant heat generation model typically predicted temperatures within 30 degrees C. Upset was estimated within 7%. Maximum force was predicted within 12% at high feed rates, but accuracy dropped to 28% when feed rate was reduced. The motor power model was the most accurate model at estimating temperature, with a typical accuracy within 25 degrees C. Axial upset was predicted within 5%. Maximum force was predicted within 1-8%, with greater accuracy occurring at higher feed rates.
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9

Taylor, W. A. "Generation of welding procedures for the submerged arc process using expert system techniques." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381901.

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Mi, Bao. "Implementation of Fiber Phased Array Ultrasound Generation System and Signal Analysis for Weld Penetration Control." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/5275.

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Анотація:
The overall purpose of this research is to develop a real-time ultrasound based system for controlling robotic weld quality by monitoring the weld pool. The concept of real-time weld quality control is quite broad, and this work focuses on weld penetration depth monitoring and control with laser ultrasonics. The weld penetration depth is one of the most important geometric parameters that define the weld quality, hence remains a key control quantity. This research focuses on the implementation and optimization of the laser phased array generation unit and the development of signal analysis algorithms to extract the weld penetration depth information from the received ultrasonic signals. The system developed is based on using the phased array technique to generate ultrasound, and an Electro-Magnetic Acoustic Transducer (EMAT) as a receiver. The generated ultrasound propagates through the weld pool and is picked up by the EMAT. A transient FE model is built to predict the temperature distribution during welding. An analytical model is developed to understand the propagation of ultrasound during real-time welding and the curved rays are numerically traced. The cross-correlation technique has been applied to estimate the Time-of-Flight (ToF) of the ultrasound. The ToF is then correlated to the measured weld penetration depth. The analytical relationship between the ToF and penetration depth, obtained by a ray-tracing algorithm and geometric analysis, matches the experimental results. The real-time weld sensing technique developed is efficient and can readily be deployed for commercial applications. The successful completion of this research will remove the major obstacle to a fully automated robotic welding process. An on-line welding monitoring and control system will facilitate mass production characterized by consistency, high quality, and low costs. Such a system will increase the precision of the welding process, resulting in quality control of the weld beads. Moreover, in-process control will relieve human operators of tedious, repetitive, and hazardous welding tasks, thus reducing welding-related injures.
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Книги з теми "Welding generator"

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Gases, American Welding Society Project Committee on Fumes and. Methods for analysis of airborne particulates generated by welding and allied processes. Miami, Fla: AWS, 1997.

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2

Mosesov, Marat. Fundamentals of metal science and welding. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1085480.

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Анотація:
The textbook discusses the properties of metals used in construction, methods of their production and processing, as well as methods and technical means of performing welded joints. The presented material meets the requirements of the federal state educational standards of higher education of the latest generation and the programs of the courses "Technology of structural materials" and "Metal Science and Welding", taught to students of the faculties "Industrial and Civil Engineering", "Hydraulic Engineering", "Heat and Gas Supply and Ventilation", "Construction of unique buildings and structures", as well as to first-year students of the Faculty" Mechanization, Automation and Electrification of Construction " and undergraduates studying the course of metal structures and technologies of structural materials. It will be useful for students in mastering the lecture material, conducting laboratory work and completing diploma projects, as well as for students of advanced training courses and retraining of construction specialists.
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3

E, Knoll Robert, ed. Weldon Kees and the midcentury generation: Letters, 1935-1955. Lincoln: University of Nebraska Press, 1986.

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4

Adaskin, Anatoliy, Aleksandr Krasnovskiy, and Tat'yana Tarasova. Materials science and technology of metallic, non-metallic and composite materials:the technology of manufacturing blanks and parts. Book 2. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1143897.

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Book 2 presents the technologies for manufacturing blanks and parts from metal materials: casting, welding, pressure treatment and cutting. The basics of electroplating technology are given. The technologies of manufacturing parts from non-metallic materials are considered: plastics, rubber, glass, as well as composite materials. The technologies combining the production of composite materials and parts from them are shown. The textbook is supplemented with two chapters reflecting the trends in the development of technology and technology (chapter 28 " Nanostructured materials. Features. Technologies for obtaining. Areas of application", chapter 29 "Additive manufacturing"). Meets the requirements of the federal state educational standards of higher education of the latest generation. For bachelors and undergraduates studying in enlarged groups of training areas 15.00.00 "Mechanical Engineering" and 22.00.00 "Materials Technologies". It can be used for training graduate students of machine-building specialties, as well as for advanced training of engineering and technical workers of machine-building enterprises.
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5

Power Generation: Core Research from TWI (TWI Core Research). Woodhead Publishing, 2000.

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6

The 2006-2011 World Outlook for Direct Current Arc Welding Generators Excluding Stud Welding Equipment. Icon Group International, Inc., 2005.

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7

Parker, Philip M. The 2007-2012 World Outlook for Direct Current Arc Welding Generators Excluding Stud Welding Equipment. ICON Group International, Inc., 2006.

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8

Bakar, Nooh Abu. ESWELPD: An expert system for the generation of welding procedure of arc welding processes. 1990.

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9

Society, American Welding. Methods for Sampling Airborne Particulates Generated by Welding and Allied Processes (ANSI/Aws). American Welding Society, 1985.

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10

Methods for Sampling Airborne Particulates Generated by Welding and Allied Processes (F1.1-92). American Welding Society, 1992.

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Частини книг з теми "Welding generator"

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Lauer, Sascha, Sebastian Rieck, Martin-Christoph Wanner, and Wilko Flügge. "Partial Automated Multi-Pass-Welding for Thick Sheet Metal Connections." In Annals of Scientific Society for Assembly, Handling and Industrial Robotics 2021, 399–410. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-74032-0_33.

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AbstractThe production of tubular-node-connections, which are required for the construction of offshore wind energy plants or converter platforms, is subject to high manufacturing standards. The welding process is currently carried out manually and requires a great deal of experience on the part of the welder. In this process, one or more branch member pipes are welded to a base pipe, which vary in their diameters and alignment to each other. This results in a small batch size for which no standard automation solution can be considered. The approach of a pre-defined offline path-planning is not expedient, since the weld metal forms differently with the multiple curved geometries and the desired target result cannot be achieved with an integrated compensation. The approach for automation combines the experience of a skilled welder with the accuracy of an industrial-robot. For implementation, the robot system moves along the welding contour with a 2D-profile sensor. The joint profile is recorded at defined measurement points. Parallel to the seam cross-section, the current gradient of the geometry in relation to the horizontal plane is stored. After all the information has been generated, it is visualized for the operator in a graphical user interface. The operator can use his experience in the field of welding technology and can carry out the positioning of the weld seam in every single scan generated. The decisions on positioning are stored in the system and serve as a base for a future implementation of an automatic system for positioning welding beads on multi-curved contours.
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Meuser, Robert B. "Shell Hoop Prestress Generated by Welding." In Supercollider 3, 413–17. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3746-5_41.

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Yang, Ju-wen, Shuang-yan Li, Mao-long Zhang, Li-li Wang, and Wen-yang Zhang. "Welding Process and Welding Consumable of Generation III Nuclear Island Main Equipment." In Proceedings of The 20th Pacific Basin Nuclear Conference, 435–50. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-2317-0_42.

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Zhivov, Alexander. "Processes and Contaminant Generation in Welding Shops." In SpringerBriefs in Applied Sciences and Technology, 19–23. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77295-6_4.

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Lv, Na, and Shanben Chen. "Channel Generation Mechanism and Modeling for Arc Sound Signal During GTAW." In Key Technologies of Intelligentized Welding Manufacturing, 37–49. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2002-0_4.

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Mandziej, Stan T. "Remnant Life Estimation for Repair Welding in Thermal Power Generation." In Design, Fabrication and Economy of Metal Structures, 263–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36691-8_40.

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Kwieciński, Krzysztof, Mirosław Łomozik, Michał Urzynicok, and Paola Mariani. "Welding New Generation Steel PB2 Using Conventional Welding with and without PWHT with Use of Temper Bead Technique." In Design, Fabrication and Economy of Metal Structures, 495–500. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36691-8_75.

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Lee, Jang Hyun, Kyung Ho Lee, and Chan Woo Lee. "Analysis of Residual Stresses in Multi-Pass Welding Using Element Generation Technique." In Experimental Mechanics in Nano and Biotechnology, 1287–90. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-415-4.1287.

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Blight, J., and R. Rougier. "THOR 2 — Tig Hyperbaric Orbital Robot Second Generation Automatic Hyperbaric Welding System." In The European Oil and Gas Conference, 404. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-010-9844-1_57.

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Mahmood, Moazzam, Vijay K. Dwivedi, and Rajat Yadav. "Effect of Current on the Hardness of Weld Bead Generated by TIG Welding on Mild Steel." In Lecture Notes in Mechanical Engineering, 739–45. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4320-7_65.

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Тези доповідей конференцій з теми "Welding generator"

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Jatoth, Rajender, and Manisha Dubey. "High Voltage Trigger Generator for Magnetic Pulse Welding System." In 2022 IEEE International Students' Conference on Electrical, Electronics and Computer Science (SCEECS). IEEE, 2022. http://dx.doi.org/10.1109/sceecs54111.2022.9740759.

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Hill, R. "Welding solutions for turbine generator plant repair, upgrade and life extension." In International Conference on Life Management of Power Plants. IEE, 1994. http://dx.doi.org/10.1049/cp:19941099.

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Rossillon, Frédérique, and Lionel Depradeux. "Simplified Computation of the Welding Process on a Steam-Generator Divider Plate." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-97238.

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The integrity of structures in nuclear power plants has to be assessed to meet given safety criteria. For a better understanding of the in-service loads in welded areas of PWRs components, the residual stresses resulting from the welding process have to be estimated. For that purpose, numerical simulations of welding have proved efficient but still require some improvement in terms of computation time reduction to be widely used in an industrial context. This paper focuses on the residual stress fields in a double V butt weld on a steam generator divider plate. To set a reference, a 2D simulation of multi-pass welding was performed taking into account the whole non-linear thermo-mechanical history. Two simplified method were then carried out to estimate the residual stress field. The first method consists of modeling macro-beads by merging passes together. The second considers only a reduced number of appropriately selected passes in the analysis. Both methods are confronted to the full multi-pass simulation, set as a reference simulation, and their respective efficiency and robustness are discussed. The main feature of this work, the RNP method, based on a reduced number of appropriately selected passes, gives a good reproduction of the stress fields and strongly reduce the computation time. A significant improvement is observed: CPU time is divided by 10 times with this predictive method.
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Park, Kwang Soo, Chang Sig Kong, Seon Ho Lee, and Woo Sung Kim. "Development of Repair Technologies for J-Groove Welds of Drain and Instrument Nozzle in Steam Generator." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75817.

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SG drain & instrument nozzles and their welds fabricated with alloy 600 and alloy 82/182 is susceptible to Primary Water Stress Corrosion Cracking (PWSCC). In Korea, the cracks due to PWSCC were discovered in the drain nozzle of Yongkwang units 3 & 4. Doosan has developed a system for steam generator to repair damaged drain nozzle & welds and to prevent further damage on the instrument nozzle & welds. The repair system consists of machining, welding equipment and installation tool for this equipment. The machining equipment is used to remove the nozzle and J-groove welds. The process is called mechanical machining and the main equipment is installed on steam generator’s outer wall. The welding equipment is designed for the machined J-groove welds and overlay. The auto welding equipment consists of welding head, controller, monitoring tool and Gas Tungsten Arc Welding (GTAW) power supply. Doosan has developed remote welding process using the monitoring tool. The installation tool consists of automatic installment tool for instrument nozzle and manual installment tool for drain nozzle. Doosan successfully completed a mockup test and field application for Yongkwang unit 3.
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Zhao, Liang, Jianqun Hu, Zhigang Wu, and Xin Wang. "Maintenance Strategy for Branch Connection on the Hot Leg of Steam Generator in CANDU 6." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29700.

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A maintenance strategy to repair or modify the dissimilar weld on the branch connection of the steam generator hot leg in CANDU6 was developed. The repair method is to add a carbon steel pipe spool as a transition fitting to transfer the dissimilar weld to shop welding, and the modification method is to use the backup tap fabricated during plant installation, so that the weld quality would be superior comparing with field welding, and the quantity of argon gas getting into the primary heat transport system would be reduced simultaneously. A gasbag is used to isolate the branch connection for welding performance when the primary heat transport system is drained to low level state during the prolonged shutdown. If the gasbag could not work, a nonstandard pipe fitting with O-ring should be used to isolate the branch connection.
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Nicak, Tomas, Matthias Hu¨mmer, and Elisabeth Keim. "Numerical Simulation of the Weld Residual Stresses for a Man-Hole Drainage Nozzle in a Steam Generator: Design Comparison." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26119.

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The numerical welding simulation has developed very rapidly during the last few years. The problem complexity has increased from simple 2D axis-symmetric or cross-section models to full 3D models, which can describe the entire welding process more realistically — including start-stop effects. As recent research projects indicate, a quantitative assessment of the residual stresses magnitude by means of a 3D analysis is possible. Moreover, the structure integrity with respect to fatigue, fracture or Stress Corrosion Cracking (SCC) processes can be evaluated based on the welding simulation results superimposed with the operating load (or any arbitrary disturbance transient load). This makes a more accurate life time prediction of the welded components possible. Furthermore, in order to minimize the residual stresses in components, a parametric study can be performed considering important input data like heat input or bead sequencing. It would make the development of virtual welding procedures possible, which can essentially help to cut the design and operating costs. In this paper a full 3D numerical welding simulation for a man-hole drainage nozzle in a steam generator will be presented. Two design options are considered. The residual stresses are calculated by means of an uncoupled transient thermal and mechanical FE analysis using the ABAQUS code. The paper will present a robust procedure allowing reasonable predictions of the residual stresses for complex structures in industrial practice.
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Chen, Rong, Wen Xiang Hua, Yan Lei Yang, and Xiao Zhong He. "Missile Probability Analysis of Welding Nuclear Turbine Rotor." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26723.

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In this paper, a 1000MW nuclear turbine LP welded rotor was analyzed to assure the missile safety of the turbine, which is required by the Nuclear Regulatory Commission (NRC). Finite element analysis method was used to estimate the stress level of the rotor. Stress corrosion cracking (SCC) was considered as the main reason of the rotor failure. The probabilistic method was used to assess the missile safety of the turbine rotor. The high speed turbine rotor is one of the key components of the turbine-generator system which was related closely to the safety and economy of the Power Plant’s operation. In this paper the rotor design & analysis process for the Shanghai Turbine Plant’s nuclear 1000MW power station is described. The operation of the turbine rotors of the nuclear power plant suffered from the severe stresses because of high temperature and high speed during start-up, shutdown and load changes. The moisture steam environment due to the low nuclear steam temperature also increase the probability of the fatigue failure of the turbine rotor. The integrity of the turbine rotor was threatened by the material deterioration caused by fatigue and moisture corrosion of the rotor at some critical locations. The fatigue mechanisms of the turbine rotor are described. Key factors that influence missile probability are discussed. Rotor damage due to SCC is discussed and analyzed to evaluate the probability of the nuclear turbine rotor.
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Soh, Na-Hyun, Nam-Su Huh, and Jun-Seok Yang. "Effect of the Groove Shape on Residual Stress Distribution of Narrow Gap Welds." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57195.

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Recently, in Korea, the reactor coolant main loop piping and the steam generator have been connected with narrow gap welding (NGW) method after the replacement of steam generator of Korean nuclear power plants. The NGW method has many advantages, for instance, the reduction of welding time and the shrinkage of weld, and the small deformation of a component resulting from the small groove angle and welding bead width. In the actual welding process with NGW, some different groove shapes have been adapted. Noting that the distribution of a weld residual stress is significantly affected by welding conditions, for instance, shape of weld groove, direction of welding and width of weld groove etc., the weld residual stress due to NGW with different welding conditions should be accurately investigated for its application to life assessment considering actual conditions since these residual stress distributions can affect the susceptibility of parent and weld material to the primary water stress corrosion cracking (PWSCC) which is one of main issues in the nuclear component integrity. In this context, the present paper investigates the distribution of the weld residual stress as well as the deformation behavior of ER308L weld due to NGW using the nonlinear 2-dimensional (2-D) finite element (FE) analysis in which the detailed actual welding process of NGW was simulated. In particular, the effect of shape of weldment, i.e., the shape of welding groove (“single-side weld” and “double-side weld”) and the width of weld, on the residual stress is emphasized. Based on the FE results, the relevant groove shape is discussed in the sense that it provides lower residual stress values at the inner surface of pipe, which might reduce susceptibility to PWSCC.
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Takase, Kazuyuki, Toshiharu Muramatsu, Takahisa Shobu, and Kazuyuki Tsukimori. "Computational Simulations on Melting Process of Fine Metal Powders With Laser Irradiation Welding." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-13219.

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At the commercial use stage in sodium-cooled fast breeder reactors, securing maintenance and repair better than an equal to that of present water-cooled reactors is needed. Especially a repair technology that secures the plant integrity for long-term operation period becomes indispensable in the heat exchanger tubes of the steam generator that form the boundary of sodium and water coolants. Then the present study focused on the standardization of welding technology with a laser. An experimental study regarding the welding of a stainless steel plate with the laser using fine metal powders is being performed. Moreover, a numerical study is performed to simulate the welding of the fine metal powder on the stainless steel plate. The fine metal powder is made of iron, and is heated by the laser beam, and then melts exceeding the melting temperature. This paper reports the computational results of the welding phenomenon of some metal powders which changes from solid to liquid and liquid to solid. The results were compared with the experimental results qualitatively.
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van Gestel, Ron, and Sjef Mattheij. "Rotor Repairs." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-351.

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Often, turbine and generator rotors are produced from a single forging or from two forged bearing ends with a stack of discs in between. As with many other components in rotary equipment these precision machined forgings can be damaged or worm during operation. Due to the sensitivity of the material to any kind of heat treatment, including welding, repair of this damage presents a challenge for repair engineers. This paper will give a general overview of repair. Repair may include welding, heat treatment, plasma spraying, shaft straightening, stress relieving, etc. Some recent repairs will be discussed.
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Звіти організацій з теми "Welding generator"

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John N. DuPont. Review of Dissimilar Metal Welding for the NGNP Helical-Coil Steam Generator. Office of Scientific and Technical Information (OSTI), March 2010. http://dx.doi.org/10.2172/984549.

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CROWDER, STEPHEN V., LOUIS A. MALIZIA, JR, and JOSEPH A. ROMERO. Characterization of the Precision Laser Beam Welding Process for the MC4368A Neutron Generator. Office of Scientific and Technical Information (OSTI), September 2001. http://dx.doi.org/10.2172/787636.

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