• Title/Summary/Keyword: PAM-STAMP

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Finite Element Analysis for Forming Processes of $\Omega$-type Bellows Tube (오메가형 벨로즈관의 성형을 위한 유한요소해석)

  • 이정훈;김낙수;전병희
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1997.03a
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    • pp.165-170
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    • 1997
  • The study presents an computer-aided analysis and its design for the forming process of $\Omega$-type bellows tube. Finite element analysis was carried out to perform the process simulation. Based on the analytic results of various conditions, the forming conditions used for angled U-type bellows tube were settled. The 3D modeling was constructed by I-DEAS and PAM-STAMP was used for process simulation. It is concluded that the spring back of formed bellows influences $\Omega$-shape and these results can be used for the process design.

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A Study on the Superplastic Sheet Forming by the FEM and Experiment (초소성 판재 성형을 위한 유한요소 해석 및 실험에 관한 연구)

  • Lee, Seung-Jun;Lee, Jung-Hwan;Lee, Young-Seon
    • Proceedings of the KSME Conference
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    • 2000.04a
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    • pp.866-872
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    • 2000
  • Superplastic forming processes by characteristic of low flow stress and high elongation have advantages to reducing on production cost and weight because of the product of complex form could be made in one part. However superplastically termed part has a characteristic of non-uniform thickness distribution along forming direction. Especially. since the thickness distribution affects on mechanical properties of product. the uniform thickness is very important. There are two solution procedure of implicit and explicit procedure to analyze the superplastic forming. In this study to analyze the thickness distribution two kinds of commercial programs of DEFORM and PAM-STAMP which implicit and explicit code are used respectly. The results from the two Programs were compared with eath other As a result implicit code were more suitable than explicit code for superplastic forming analysis.

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Optimal Blank Design using Virtual Try-Out Method (가상 트라이 아웃 방법을 이용한 최적 블랭크 설계)

  • Ko, Dae-Lim;Jung, Dong-Won
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.7 no.4
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    • pp.31-36
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    • 2008
  • Sheet metal forming has some merits that are less loss of materials in process, less time-consuming and it makes mass product possible. The product produced by sheet metal forming process has high strength compared to the weight and better surface characteristics. Therefore, sheet metal forming process is a lot used in automobiles, aircrafts, electronics and appliances. This paper made the process design for forming Bracket Front Back Frame Lower, determined the blank shape and size using PAM-STAMP, commercial software and evaluated formability. It has been proved that the optimal blank through the result forming analysis has advantage in terms of formability and spring back compared to the rectangular blank.

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FE Analysis on Doming & Necking Process of Steel D&I Can (Steel D&I Can의 Doming 및 Necking 공정의 FEM 해석)

  • Jung, S.W.;Nam, J.B.;You, C.S.;Jin, Y.S.;Han, K.S.
    • Proceedings of the KSME Conference
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    • 2000.11a
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    • pp.452-457
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    • 2000
  • The object of this study is to develop a reliable FEM simulation technique for the analysis of can making process using PAM-STAMP software. The processes consist of doming and necking in addition to drawing, redrawing. After body making process, this study analyzed the stability for internal pressure by simulating buckling test. Through these technique, we estimated the dome reversal pressure of steel D&I Can for various can profile and process conditions. From this study, we found the cause and mechanism of wrinkling during necking process. This mechanism is largely affected by can wall thickness and the clearance between knock out punch and necking die. The dome reversal pressure improves with increasing dome depth. These results validate the usefulness of the developed simulation technique for the analysis of body making process and optimization of the dome profile.

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Spring-back Prediction of DP980 Steel Sheet Using a Yield Function with a Hardening Model (항복함수 및 경화모델에 따른 DP980 강판의 스프링백 예측)

  • Kim, J.H.;Kang, G.S.;Lee, H.S.;Kim, J.H.;Kim, B.M.
    • Transactions of Materials Processing
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    • v.25 no.3
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    • pp.189-194
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    • 2016
  • In the current study, spring-back of DP980 steel sheet was numerically evaluated for U-bending using a yield function with a hardening model. For spring-back prediction, two types of yield functions - Hill'48 and Yld2000-2d - were considered. Additionally, isotropic hardening and the Yoshida-Uemori model were used to investigate the spring-back behavior. The parameters for each model were obtained from uniaxial tension, uniaxial tension-compression, uniaxial tension-unloading and hydraulic bulging tests. The numerical simulations were performed using the commercial software, PAM-STAMP 2G. The results were compared with experimental data from a U-bending process.

Finite Element Modeling of Flanging/Hemming Process for Automotive Panels (자동차 외판 플랜징/헤밍 공정에 대한 유한요소해석 모델링)

  • 김헌영;임희택;최광용;이우홍;박춘달
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2002.05a
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    • pp.103-107
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    • 2002
  • The 2nd forming process of flanging/hemming has recently many interest because it determines external quality of automobile. It is difficult to apply finite element simulation in flanging/hemming due to small element size which needs for expression of bending effect on the die corner and big model size of side door, back door, tank lid and like opening Parts. This paper shows the process of flanging/hemming simulation using finite element model for automotive panels. The explicit finite element program PAM-STAMP$\^$TM/ was used to simulate the flanging and hemming operations.

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Weldline Movement Characteristics for the Warm Deep Drawing of Tailor Welded Blanks (용접 판재의 온간 성형에서의 용접선 이동 특성)

  • Yoo J. S.;Heo Y. M.;Lee S. M.;Seo D. G.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2001.05a
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    • pp.151-155
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    • 2001
  • The purpose of this study is to investigate the weldline movement of the laser welded sheets during the warm deep drawing process. For this investigation, Five steps of temperature ranges, from room temperature to $200^{\circ}C$, and two kinds of thickness combination, 0.8 mm${\times}$1.2 mm and 0.8 mm${\times}$1.6 mm SCP1 material sheets, were adopted. Also, the numerical analysis using the PAM-STAMP has been carried out with the same models as the specimens. As a result the higher temperature was adopted, the less weld-line movement was observed.

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A Study on the Process Design and Deformation Analysis for Pressure Vessels by Finite Element Method (유한요소법을 활용한 압력용기의 설계 및 성형해석에 관한 연구)

  • 한규택
    • Journal of Advanced Marine Engineering and Technology
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    • v.22 no.4
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    • pp.460-467
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    • 1998
  • The investigation deals with the manufacturing process design and deformation analysis for seamless pressure vessels Axisymmetric multistage deep drawing is a complex and important sheet metal forming process in the industry. In this study the process design for large size cylindrical shells with various thickness is performed and a general guideline for forming process design of pressure vessels will be suggested. Thus in this paper for the verification of the forming process design the forming analysis of pressure vessels will be carried out by PAM-STAMP which is on the basis of finite element analysis. In this case the formability of pressure vessels is evaluated using the results of computer simulation.

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Small Electrode Ring Forming by Multi-Forming Process (멀티 성형 가공법을 활용한 전극용 소형 링 성형)

  • Yoon, Il-Chae;Ko, Tae-Jo;Lee, Chun;Kim, Hui-Sul
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.8 no.3
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    • pp.38-45
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    • 2009
  • Recently, LCD Backlight Unit is being replaced from cold cathode fluorescent lamp(CCFL) to external electrode fluorescent lamp(EEFL) because the EEFL has high energy efficiency and long life. Also, it can reduce energy consumption and weight. So far, external electrode ring for EEFL is produced by sheet metal press forming process. Therefore it had low precision and much material loss. To solve these problems, Multi-Forming process that has five step forming process was invented. However, low productivity is another barrier. Product speed that is controlled by the rotational speed cannot be increased due to the unsatisfied design specification. The reason is that the gap between rolled two edge parts of the sheet plate is tightly inspected. Regarding this factor, the understanding of forming behavior to each process is inevitable. This paper describes the CAE analysis of the multi-forming process by PAM-STAMP.

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Analysis on the Tube and Welded Blank Hydroforming of Automotive Engine Mount Bracket (자동차 엔진마운트 브래킷의 관재 및 용접판재 유압성형에 대한 성형해석)

  • 김헌영;신용승;홍춘기;전병희;오수익
    • Transactions of Materials Processing
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    • v.10 no.1
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    • pp.3-14
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    • 2001
  • Hydroforming is the technology using hydraulic pressure and forming sheet or tube metals to desired shape in a die cavity. lt can be characterized as tube hydroforming and sheet hydroforming depending on the shape of used blank. Due to its prcess-related benefits, this production technology has been remarkably noticed for great potential for feasible applications and recently gained great attraction from many industrials including automotive and non-automotive. This Paper analyzed the tube and the welded blank hydroforming process and compared formability of the processes for automotive engine mount bracket. The mathematical analysis was performed by using the dynamic explicit finite element code, PAM-STAMP. In tube hydroforming, bending, springback, and forming analysis were carried out and the effect of mandrel and axial feeding were examined. In welded blank hydroforming, pressure curve history is determined and the results of forming analysis were evaluated by the comparison of experimental results in the aspects of deformed shape and thickness distribution.

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