• Title/Summary/Keyword: Mandrel Drawing

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Die Design in Mandrel Drawing by using Backward Tracing Scheme: A Case for Hollow Linear Motion Guide Rail (역추적 기법을 활용한 중공형 LM-Guide Rail의 맨드렐 인발 금형 설계)

  • Kim, B.M.;Kim, S.H.;Lee, K.H.
    • Transactions of Materials Processing
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    • v.26 no.5
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    • pp.300-305
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    • 2017
  • In this paper, a design method for an intermediate die was developed to manufacture a hollow linear motion guide rail in mandrel drawing process based on virtual die method and backward tracing scheme. FE simulations and mandrel drawing experiments using Mn55Cr carbon steel were performed to prove the effectiveness of the proposed design method. Results of FE simulations and experiments showed that the proposed design method could lead to drawn products with sound shape and the highest dimensional precision.

Effects of Mandrel and Die Shape in Seamless Tube Drawing (이음매 없는 관 인발에서 맨드렐과 금형 형상의 영향)

  • Lee, Y.S.;Yoon, S.H.;Yoon, D.J.
    • Transactions of Materials Processing
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    • v.20 no.8
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    • pp.562-567
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    • 2011
  • This paper deals with effects of certain important factors in a tube drawing operation, such as the use of a mandrel, die radius and tangential angle at die outlet, on the deformation behavior of a small-diameter seamless tube. Both experimental and finite element simulation studies are carried out to assess the effects of the above parameters. Experiments and finite element predictions are compared. The use of a mandrel simplifies the design of tube drawing, but also induces some difficulties from increased process complexity. The effects of die outlet tangential angle and radius are discussed in detail.

Design of mandrel in tube drawing process for automotive steering input shaft (자동차용 SIS 인발 공정에서의 맨드렐 형상 설계)

  • Kim S. W.;Lee Y. S.;Kwon Y. N.;Lee J. W.;Lee J. H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2005.10a
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    • pp.198-201
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    • 2005
  • Monobloc technology Provides a homogeneous material along the complete tubular shaft without any discontinuity between the interconnecting tube and the stems as is found when the tubes and stems have been Joined by welding. Cold tube drawing is a technique that can be applied for manufacturing of those monobloc tubular shafts with several advantages such as high productivity and cost reduction. The present study is concerned with the investigation about the process parameters related with tool configuration. In order to obtain successfully formed SIS(Steering Input Shaft) without any defects, advanced design of mandrel is presented and analyzed by the FEM and ductile fracture criterion in this paper.

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Die Design for Shape Drawing to Improve the Dimensional Accuracy of a Hollow LM-Guide Rail (중공형 LM-Guide Rail의 치수정밀도 향상을 위한 형상인발 금형 설계)

  • Park, J.H.;Lee, K.H.;Kim, S.M.;Kim, H.J.;Kim, S.J.;Kim, B.M.
    • Transactions of Materials Processing
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    • v.24 no.5
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    • pp.340-347
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    • 2015
  • Multi-pass shape drawing is used to manufacture long products of arbitrary cross-sectional shapes. This process allows smooth surface finishes and closely controlled dimensions of the cross-sectional shape. Tube shape drawing for hollow type products provides material savings and weight reduction. The intermediate die shapes are very important in multi-pass tube shape drawing. In the current paper, the design method for the intermediate dies in a tube shape drawing process is developed using a die offset for corner filling (DOCF) method. Underfill defects are related to the radial velocity distribution of each divided section in the deformation zone. The developed intermediate die shape design was applied to the two-pass tube shape drawing with fixed mandrel for manufacturing a hollow linear motion (LM) guide rail. The proposed design method led to uniform and steady metal flow at each divided section. FE-simulations and experiments were conducted to validate the effectiveness of the proposed method in multi-pass tube shape drawing process.

Analysis of Deformation of Brass Tube Drawn By Various Methods (인발 방법에 따른 황동관의 변형 해석)

  • ;Oh Kyu Hwan;Lee Dong Nyung
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1995.10a
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    • pp.76-85
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    • 1995
  • The general equation of homogeneous strin for tube drawing has been derived. This can be applied to the general tube drawing method for non-zero plug angle. Also, the derived equation can represent Blazynski's equations for the sinking and tube drawing with a constant plug diameter. The general tube drawing was divided into two steps, sinking and contact drawing zones. The derived equation can calculate the homogeneous strains of the two steps. The various tube drawing methods such as fixed tapered plug, fixed mandrel, fixed back tapered plug, and floating plug have been analysed by the equation and finite element analysis. From the FEM calculations, the total strains and drawing stresses are obtained and consequently the redundancy factor of various drawing methods was analysed. The fixed back tapered plug method showed the largest redundancy factor and the floating plug method had the largest drawing stress.

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Process Design of Monobloc Tube for Steering Input Shaft in Cold Drawing (일체형 스티어링 휠 튜브의 인발에 관한 연구)

  • Lee S. K.;Moon H. S.;Kim B. M.;Lee J. H.;Lee Y. S.
    • Transactions of Materials Processing
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    • v.14 no.9 s.81
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    • pp.779-784
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    • 2005
  • MTS(Monobloc Tube Shaft) has been used for the reduction in weight of shaft and increase in supply of power in the auto industry nowadays. Cold drawing process having high productivity and reduction in the cost has been regarded as the effective technology that is able to substitute for swaging process as forming MTS with constant outer diameter or hollow shaft without surface defects. The objective of this study is not only to (md out the optimal process conditions understanding the effect of process parameters on carrying out cold drawing process of SIS(Steering Input Shaft) but also to control the defects resulted from inappropriate process conditions. Therefore, the proper drawing conditions are presented using FE-Analysis and experiment in the paper.

Process design of Monobloc Tube for Steering Input Shaft in cold drawing (일체형 스티어링 휠 튜브의 인발공정 설계)

  • Moon H. J.;Lee S. G.;Lee J. H.;Lee Y. S.;Lee J. W.;Kim B. M.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2005.10a
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    • pp.431-434
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    • 2005
  • MTS(Monobloc Tube Shaft) has been used for the reduction in weight of shaft and increase in supply of power in the auto industry nowadays. Cold drawing process having high productivity and reduction in the cost has been regarded as the effective technology that is able to substitute for swaging process as forming MTS with constant outer diameter or hollow shaft without surface defects. The objective of this study is not only to find out the optimal process conditions understanding the effect of process parameters on carrying out cold drawing process of SIS(Steering Input Shaft) but also to control the defects resulted from inappropriate process conditions. Therefore, the proper drawing conditions are presented using FE-Analysis and experiment in the paper.

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Experimental Investigation on the Flow Control of Hub Clutch for Automobile (자동차용 허브 클러치의 유동제어에 관한 실험적 연구)

  • 박종남;김동환;김병민
    • Transactions of Materials Processing
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    • v.11 no.5
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    • pp.430-438
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    • 2002
  • This paper suggests the new technology to control metal flow in orther to change of the cold forging from conventional deep drawing forming. This technology can be summarized the complex forming, which consists of bulk forming and sheet forming, and multi-action forging, which be performed double action press. The proposed technology is applied to hub clutch model which is part of auto-transmission for automobile. The purpose of this study is to investigate the material flow behavior of hub clutch through control the relative velocity ratio and the stroke of mandrel and punch using the flow forming technique. First of all, the finite element simulations are applied to analyse optimal process conditions to prevent flow defect(necking defect etc.) from non-uniform metal flow, then the results are compared with the plasticine model material experiments. The punch load for real material is predict from similarity law. Finally, the model material experiment results are in good agreement with the FE simulation ones.