• Title/Summary/Keyword: Die plate

Search Result 169, Processing Time 0.026 seconds

Investigation into Effect of the Shape of Lip Die on Flow Characteristic in the Extrusion of Plate Wider than the Diameter of the Round Billet Using Lip Die (립(Lip) 금형을 이용한 원형 빌렛 직경 이상의 판재 압출에서 금형 형상이 금속 유동에 미치는 영향에 대한 연구)

  • 김경진;이창희;양동열
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2003.10a
    • /
    • pp.265-268
    • /
    • 2003
  • In the extrusion process, the working material is forced to flow through a die with the desired profile. In general, the width of an extruded section is limited to about an inch less than the diameter of the round billet. But through the lip die, material is spreaded to produce a wider extruded section than the diameter of round billet. In this study, the extrusion process of an aluminum plate using the lip die is investigated. The width of the extruded plate is 450mm that is formed from the round billet with a diameter of 250mm. The flow characteristic through the lip die is considered to produce the wide-extruded plate with a small billet using rigid plastic FE analysis. Based on the result of FE analysis, new designs of lip die are proposed.

  • PDF

Optimization of the Shape of Lip Die in the Extrusion of Plate Wider than the Diameter of the Round Billet using a Lip Die (립(Lip)금형을 이용한 원형 빌렛 직경 이상의 판재압출에서 립금형 형상의 최적화)

  • Kim K.J.;Lee S.R.;Yang D.Y.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2004.10a
    • /
    • pp.115-119
    • /
    • 2004
  • In the extrusion process, the working material is forced to flow through a die with the desired profile. In general, the width of an extruded section is limited to about an inch less than the diameter of the round billet. But through the lip die, material is spreaded to produce a wider extruded section than the diameter of round billet. In this study, the extrusion process of an aluminum plate using the lip die is investigated. The width of the extruded plate is 450mm that is formed from the round billet with a diameter of 250mm. The flow characteristic through the lip die is considered to produce the wide-extruded plate with a small billet using rigid plastic FE analysis. Based on the result of FE analysis, an optimized design of the lip die is then proposed.

  • PDF

Kinematic Analysis of a Double-Action Link-Type Die Set for the Enclosed Die Forging (폐쇄단조용 복동링크식 다이세트의 기구학적 해석)

  • Park Rae-Hun;Jun Byoung-Yoon;Lee Min-Cheol;Joun Man-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.30 no.10 s.253
    • /
    • pp.1293-1297
    • /
    • 2006
  • In this paper, kinematic analysis of a double-action link-type die set for enclosed die forging is carried out. The structure of the die set and its operational principle during enclosed die forging are introduced in detail. A closed-form solution of the relative velocity of the middle plate with respect to the upper plate after the upper and lower dies are enclosed is given in terms of the link lengths and the distance from the lower pin to the upper pin of the link system. The effect of the link lengths on both strokes and velocities is investigated. It has been shown that the relative velocity of the middle plate with respect to the upper plate varies almost linearly with the stroke of the upper plate.

A Study on the Blanking Characteristic of Anti- Vibration Sheet Metal (제진 강판의 블랭킹 가공 특성에 관한 연구)

  • 이광복;이용길;김종호
    • Transactions of Materials Processing
    • /
    • v.12 no.8
    • /
    • pp.724-729
    • /
    • 2003
  • In order to study the shearing characteristic of anti-vibration sheet metal which is used to reduce vibration noise, a blanking die was manufactured to blank a workpiece. The variables employed in this study were clearance, type of stripper plate, position of the rubber layer and type of the die design. These variables were used to study the effects on burr height, blank diameter and camber height. In the case of burr height from experimental investigation, the push-back die, combined with a movable stripper plate, showed greater burr height. The rubber-top position of a workpiece resulted in better qualities regardless of working variables. In the comparison of diameter measurement, the use of the push-back die with a fixed stripper plate, with a 4.5% clearance, showed better accuracy. For comparing camber height, the push-back die resulted in less cambering than the drop-through die. Also, the larger the clearance, the greater was the camber height. Considering experimental results, the shearing of anti-vibrational sheet metal is best achieved when the rubber layer is laying on the top, blanked with a fixed stripper plate in a push-back die, with a 4.5% clearance.

A Study on Forming Characteristics in Plate Type Cross Rolling Process (평판형 전조압연의 성형특성 연구)

  • Yoon D. J.;Lee G. A.;Lee N. K.;Choi S.;Lee H. W.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2005.05a
    • /
    • pp.329-332
    • /
    • 2005
  • Cross rolling process is one of incremental forming processes to form an axi-symmetric shaped metal component. It can be classified into two types according to the shape of dies, which are a drum type (roll type) and a plate type (straight type). It can also be classified into a wedge type and a ramp type processes according to deformation characteristics of a material. The ramp type die is applied to plate type cross rolling process in cold forming process for forming of teeth of gear or bolt, while the wedge type die is generally utilized to drum type and plate type cross rolling processes in hot forming process. A shape of the ramp type die is usually same as final shape of a product at every section of a progressing direction, while the shape of the wedge type die has different shapes in a progressing direction. In this paper, a rolling of neck part in a ball stud component has been carried out using the plate type cross rolling process with a ramp shaped die. Forming characteristics have been performed using finite element analysis in order to obtain a proper preform for the ramp type plate cross rolling process.

  • PDF

Fabrication Process of Rheology Material Thin Plate Using Vacuum Low Pressure Die-casting Process with Electromagnetic Stirring (레오로지 박판의 전자교반을 응용한 진공 저압주조 제조공정)

  • Jang, Sin-Kyu;Bae, Jung-Woon;Jin, Chul-Kyu;Kang, Chung-Gil
    • Journal of Korea Foundry Society
    • /
    • v.32 no.1
    • /
    • pp.16-23
    • /
    • 2012
  • In this study, we develop the lower pressure die casting with rheo-forming process of A356 aluminum alloy and vacuum system which can control the crystal size and obtain the high strengthened-light material. Using this process, we fabricate the thin plate for bipolar plate through the low pressure die casting with electromagnetic stirring and vacuum-evacuation which can control the crystal grain by electromagnetic stirring. Thin plate ($110mm{\times}130mm{\times}1mm$) is fabricated by this process. The average Vickers hardness of thin plate is about 77 HV.

Development of Adjust Plate Progressive Die (자동차용 Adjust Plate Progressive 금형 개발)

  • Bae, Yong-Hwan;Ban, Gab-Su
    • Journal of the Korean Society of Safety
    • /
    • v.17 no.4
    • /
    • pp.1-4
    • /
    • 2002
  • A automatic production system was developed for high productivity and safety. The semi-progressive die was unfavorable for more productivity, safety, material extravagance and incongruent high-speed production. Developed progressive die is suitable for the high production and guarantee triple production by acceptance of three array type for automobile adjust plate. We adopt Pro-$Engineer{\circledr}$ for three dimensional computer aided design suitable for the disassembly and assembly evaluation. The conclusion of this study is as follow. First, press die parts solid modeling system is built by using Pro-$Engineer{\circledr}$ through this research and verified allowable tolerance and possibility of assembly and disassembly of parts. Therefore we can reduce die manufacturing time and cost. Second, We produce 1000 units pet hot coil 1ton by traditional method, but we can acomplish material saving effect about 12% as 120 units in case of new progressive die. Fourth, we acomplished manufacturing cost curtailment effect more than 20% in comparison with traditional method.

A Study on Micro Hole Punching with Soft Die Plate (소프트 다이 플레이트를 이용한 미세 구멍 펀칭 연구)

  • Yoo J. H.;Joo B. Y.;Jeon B. H.;Oh S. I.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2002.02a
    • /
    • pp.260-265
    • /
    • 2002
  • In micro hole punching process, it is very difficult to align punch with die hole. Misalignment can cause a falling-on in hole quality and breakage of punch and die. Micro punching using soft die plate without a die hole has a big advantage because it is not necessary to align punch with die hole and to consider die clearance. Soft die plates are made by polymers or hard rubbers which are softer than metals. In this study, several micro punching experiments are conducted. Micro punching test with some materials shows that micro hole punching is feasible with some soft die plates. Through the section shape obtained by mounting and polishing, the punched hole quality is measured and the shapes of burr and dome we studied.

  • PDF

A Study on the Blanking Characteristic of Anti- Vibration Sheet Metal (제진 강판의 블랭킹가공 특성에 관한 연구)

  • Lee K. B.;Lee Y. G.;Kim J. H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2003.08a
    • /
    • pp.29-34
    • /
    • 2003
  • In order to study the shearing characteristics of anti-vibration sheet metal which has been bonded by resin, a blanking die of 40.02mm was manufactured to blank a material and it is used to reduce vibrational noise. The variables employed in this study were 1) Clearance 2) types of stripper plate, and 3) types of the die design technique. These variables were used to study the effects on burr height, diameter of product, and camber height. Lastly, the effect of the position of the rubber during blanking was observed. In the case of burr height from experimental investigation, the push-back die, combined with a movable stripper plate, resulted in the concentration of additional pressure between the cutting edges, meaning the crack initiation was delayed. This result was not affected by lubrication, although appropriate lubrication is preferred to enable a longer lasting die in terms of wear, which results from the presence of adhesive as the sheet metal is blanked. In the comparison of diameter measurement, the push-back die, combined with the back pressure from the knock-out plate showed a favorable precision. The use of the push back die with a fixed stripper plate, with a $4.5\%$ clearance, showed better accuracy in the diameter measurement. For comparing camber height, the push back die resulted in less cambering than the drop-through die. Also, the larger the clearance, the greater was the camber height. Considering experimental results, the shearing of anti-vibrational sheet metal is best achieved when the rubber is laying on the top, blanked with a fixed-stripper plate in a push-back die, with a $4.5\%$ clearance.

  • PDF

Studies on the Forming Process for the Bipolar Plate of Fuel Cells

  • Jin, Chul-Kyu;Lee, Jun-Kyoung
    • Journal of the Korean Society of Industry Convergence
    • /
    • v.21 no.4
    • /
    • pp.175-181
    • /
    • 2018
  • Stamping process and rubber pad forming process were performed to manufacture the bipolar plate for fuel cells. For that, a vacuum die casting process and a semi-solid forming process wherein liquid-state materials were used were adopted. After preparing the blank with the stainless steel thin plate having a thickness of 0.1 mm, the bipolar plate channel was formed with the stamping process and rubber pad forming process. The depth of the bipolar plate channel prepared by the stamping method was 0.45 mm and the depth of the bipolar plate channel prepared by the rubber pad forming process was 0.41 mm. Meanwhile, with the vacuum die casting and semi solid forming, the bipolar plate having a channel depth of 0.3 mm, same as the size of the die, could be formed.