• Title/Summary/Keyword: Indirect forging

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A study on a hot forging process monitoring for measurement of indirect forging force in flange bolt forming of titanium alloys (티타늄 합금 플랜지 볼트 성형에서의 단조력 간접 측정을 위한 열간 단조 공정 모니터링에 관한 연구)

  • Ha, Seok-Jae;Choi, Doo-Sun;Lee, Dong-Won;Song, Ki-Hyeok
    • Design & Manufacturing
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    • v.15 no.1
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    • pp.14-20
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    • 2021
  • The objective of this study is to introduce the new possibility of sensing technology based on inductive displacement sensors to monitor the status of wheel position in the hot forging process. In order to validate effectiveness of proposed sensing technology, the indirect forging force measurement with displacement sensor was applied into a typical closed hot forging die-set used for the manufacturing of flange bolts. The locations to implement the displacement sensor were selected carefully by simulating forming process and static structural. From the measurement results of the forging force change during one hot forging cycle, it was found that the proposed monitoring system can provide useful information to understand the detailed behaviors of die-set in the closed hot forging process.

Indirect Forging Process with Aluminum Rheology Material by Electromagnetic Stirring System (전자교반을 응용한 알루미늄 레오로지 소재의 간접단조공정)

  • Oh, S.W.;Kang, S.S.;Kang, C.G.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2007.05a
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    • pp.135-138
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    • 2007
  • A semi-solid forming processing has been developed for manufacturing near net-shape components. The semi-solid forming has two methods. One is thixo-forming with reheating prepared billet, the other is rheo- forming with cooled melt until semi-solid state. In indirect forging processing, this experiment used aluminum rheology materials by electromagnetic stirring system. Rheology material is made by A16061. An experiment has variation factors which are pressure, solid-fraction, stirring current and stirring time. Forged samples are found microstructures and mechanical properties. Forged samples are accomplished heat treatment T6 for high mechanical properties.

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Development of Forging Parts for Solar Electrode Body Using Oxygen-Free Copper Material (무산소동 소재를 활용한 태양광 일렉트로드 바디 단조 부품 개발)

  • Park, Dong-Hwan;Tak, Yun-Hak
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.15 no.3
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    • pp.28-35
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    • 2016
  • Forging operations are non-stationary processes occurring because of indirect pressure, generally, under conditions of three-dimensional stress and deformation. Furthermore, due to friction and the constraints of die geometry, deformation is not homogeneous. Material flow and deformation are largely determined by the shape of the tools. It is well known that net-shape forging can improve the mechanical strength of the final product as well as reduce material waste. Oxygen-free copper that is used for electrical and electronic components has excellent electrical and thermal conductivity. Oxygen-free copper parts have a low productivity in cutting process. Thus, the forging process is performed in order to improve the low productivity in cutting process. The forging of oxygen-free copper for electrode body parts was modeled using finite element simulation and forging experiments that were conducted for producing electrode body parts at room temperature. In order to reduce the cost of cutting products, the forging was performed in a closed cavity to obtain near-net or net-shape parts.

Application development of 7050Al alloy in small arms. (소화기용 7050 Al합금소재의 적용성 개발)

  • 김헌규;최중환
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1996.11a
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    • pp.1093-1097
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    • 1996
  • The Substitution development of 7075-T6 Al alloy to 7050-T74 Al alloy in small arms to improve anti-stress corrosion cracking was processed along with mass productivity consideration. To meet 7050 Al alloy material characteristics Indirect extrusion type was adopted and local heating above recrystalization temperature in forging process had to be avoided. The T74 aging treatment was 12$0^{\circ}C$ -6hrs and 175$^{\circ}C$ -12hrs and was appropriate for both machanical and anti-cohesion properties. In accessment of field application test 7050Al alloy made parts of small arms showed equivalent or better performance than 7075 Al alloy.

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