• 제목/요약/키워드: Stretch/Blow Forming

검색결과 4건 처리시간 0.017초

균일한 두께분포를 위한 신장/블로 공정을 이용한 초소성 성형 공정설계 해석 (Analysis of Superplastic Forming Process Design Using a Combined Stretch/Blow Process for Uniform Thickness Distribution)

  • Hong, S.S.;Lee, J.S.;Kin, Y.H.
    • 한국정밀공학회지
    • /
    • 제11권1호
    • /
    • pp.129-137
    • /
    • 1994
  • A rigid-viscoplastic finite element method has been used for modeling superplastic stretch/blow process design to improve thickness distribution. Punch velocity-time relationship of the stretch forming and pressure-time cycle of the blow forming for a given strain rate are calculated. A superplastic material is assumed to be isotropic and a plane-strain line element based on membrane approximation is employed for the formulation. The effects of the width, corner radius and height of the punch during stretch forming are examined for the final thickness distribution, and the process design to improve thickness distribution can be established.

  • PDF

초소성 성형공정 최적화 (Optimization of Superplastic Forming Process)

  • 이정민;홍성석;김용환
    • 소성∙가공
    • /
    • 제7권3호
    • /
    • pp.207-214
    • /
    • 1998
  • Influence of final thickness distribution in superplastic forming processes on mechanical properties of the product becomes very crucial. We should improve the thickness distribution of products by combining process parameters adequately In this paper we adopt a non-linear optimization technique for optimal process design of superplastic forming. And optimum design variable which makes the most adequate thickness distribution in combined stretc/blow forming and blow forming is predicted by this optimization scheme and rigid-viscoplastic finite element method.

  • PDF

손잡이 일체형 PET 용기 제작을 위한 블로우 성형에 대한 수치적 연구 (A numerical study on blow molding for manufacturing PET bottle consisted of single body)

  • 김종덕;고영배;김홍렬;권창오
    • Design & Manufacturing
    • /
    • 제2권3호
    • /
    • pp.22-27
    • /
    • 2008
  • Forming of PET bottle was performed by injection-stretch blow molding. Blow molding is process of contacting the dies with air of materials by pressing. In this paper, the aim was to improve reliability of technical stabilization for the PET bottle that is last productive product and process technology which was able to do maximization by a preform performance enhancement of the uniform thickness that took temperature and a characteristic of materials. Preform design and dies manufacture were conducted using injection blow molding analysis results. Therefore thickness error of 5% for PET bottle can be obtained in this paper.

  • PDF

유한요소법을 이용한 PET병의 성형 공정 해석 (Analysis of Forming Processes of PET Bottle using a finite Element Method)

  • 주성택;김용환;류민영
    • 소성∙가공
    • /
    • 제10권7호
    • /
    • pp.525-533
    • /
    • 2001
  • PET bottles are main]y manufactured by the stretch blow-molding process. In order to improve the thickness distribution to avoid crack generation at bottom region of one-piece PET bottle, process analysis of stretch blow-molding using a finite element method has been carried out. Finite element analysis has been carried out using ABAQUS/Standard. CREEP user subroutine provided in ABAQUS has been used to model PET behavior that is rate sensitive. Among the process parameters, the effect of plunger movement to thickness distribution of bottle has been considered by axisymmetric analysis. A modified process of plunger movement, which yields more uniform thickness distribution, has been proposed. 3D FE analysis has been done to confirm the validity of the proposed process.

  • PDF