• 제목/요약/키워드: Blank Size Engineering

검색결과 38건 처리시간 0.026초

구조 최적설계 기법을 이용한 초경량차체 개념의 경량 자동차 설계 (Lightweight Automobile Design with ULSAB Concept Using Structural Optimization)

  • 신정규;송세일;이권희;박경진
    • 한국전산구조공학회논문집
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    • 제14권3호
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    • pp.277-286
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    • 2001
  • 자동차 경량화를 지향하는 초경량차체 기술 중에서 합체박판기술을 이용한 수 있는 일련의 최적설계 기법을 제안하고 기존의 자동차 도어 내판에 적용하여 경량화를 수행하였다. 먼저, 내판에 부착되는 보강재를 제거한 후 취약해진 강성을 보강하기 위한 파트 선정을 위해 위상 최적설계를 수행하여 대략적인 파트 분포를 결정하였다. 그 다음 상세설계 단계로서 각 파트의 두께는 치수 최적설계를 이용하여 정하고, 형상 최적설계로 최종 용접선을 결정하였다. 이러한 일련의 최적화를 위해 상용 소프트웨어인 GENESIS가 사용되었다.

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유한요소해석을 이용한 센터필러(고장력강-780MPa)의 스탬핑 공정 설계 (A Study on Stamping of the Center Pillar (High-Strength Steel-780MPa) Using Finite Element Analysis)

  • 방기봉;성한샘;곽효서;김철
    • 소성∙가공
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    • 제26권2호
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    • pp.87-94
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    • 2017
  • Center pillar, which is installed in the center of flank of car body, supports roof and door and ensures the safety of driver by reducing the damage of car body caused by impact. Recently, high-strength steel is widely used to manufacture the center pillar due to high stiffness and fuel efficiency. In this study, material properties of the high-strength steel, whose tensile strength is more than 780MPa, were obtained to produce the center pillar. Stamping was performed by considering the design parameters (blank holder force, press stroke, blank size and pad pressure) used in the actual filed. The drawbeads were included in the stamping process to reduce the amounts of wrinkling and spring back. Using the commercial software, Autoform R5.2 and Minitab, effects of design parameters of the stamping process upon spring back were analyzed and applied to the design process. The restriking process meets the target of under 0.5mm in the amount of spring back.

드로비드가 판재성형에 미치는 영향에 관한 실험적 연구 (An Experimental Study on the Effect of the Draw-beads in Sheet Metal Forming)

  • 김진무;유호영;고대림
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1994년도 추계학술대회 논문집
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    • pp.240-245
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    • 1994
  • Experiments on the drawability of squared boxes have been performed under various working conditions. In the present work, the pattern of material flow and the local change in the thickness of shell are used as the measures of drawability, and they are measured using the photo-etching technique. The effects of the size of draw bead, the magnitude of blank holding force and the condition of lubrication on the drawability of squared boxes have been analyzed.

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PAM-STAMP Inverse 모듈을 이용한 Brace Center Pillar Blanking 사이즈 최적화에 관한 연구 (A study on optimized Blanking size of Brace Center Pillar using Inverse module in PAM-STAMP)

  • 유상렬;김태호;박재덕;김민주;장성규;전언찬
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2006년도 춘계학술대회 논문집
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    • pp.349-350
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    • 2006
  • PAM-STAMP is a widely used program which deals with press forming analysis. A blanking used in the press process depends on the experience of the workers. Thus it causes some waste material and demands a lot of time and many costs at the manufacturing mold. So we need to optimize of the blanking size. We have studied the optimal blanking size of the Brace Center Pillar using an Inverse module in PAM-STAMP

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자동차용 부재 금형설계의 공정변수 결정을 위한 CAE 프로세스 적용 (Application of the CAE Process to the Parameter Determination far the Tool Design of an Auto-body Member)

  • 김세호;허훈;송정한
    • 한국자동차공학회논문집
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    • 제13권3호
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    • pp.64-73
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    • 2005
  • This paper is concerned with the simulation-based parameter determination for the tool design in the stamping process of the complicated auto-body member. The CAE procedure of the stamping process is proposed so that troubles such as wrinkle, springback and excess metal be eliminated with changing parameters such as the blank size, the restraining force of the draw-bead and the embossing shape in the die face. The selected indicators of failure during forming are wrinkling. the amount of spring after unloading of the tool, the amount of excess metal developed .The proposed analysis scheme is applied to the tool and process parameter design for the front side member of a RV car. The simulation results show that the scheme can produce sound product from the viewpoint of thickness distribution, the contact condition between tools and the blank, the shape accuracy and so on.

대형 압력용기 제작을 위한 9Ni-4Co-0.3C 강의 드로잉공정 설계에 관한 연구 (Design of drawing process of 9Ni-4Co-0.3C steel to make a large pressure vessel)

  • 홍진태;이석렬;김경진;양동열;이경훈;최문선
    • 한국정밀공학회지
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    • 제22권12호
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    • pp.93-99
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    • 2005
  • In this work, computer-aided process design is carried out to develop an optimal preform of a pressure vessel. Knowledge-based rules are employed to design the preform, and they are formulated using the handbooks of plasticity theories. In the FE-analysis, a commercial finite element code, ABAQUS was employed. Axisymmetric deep drawing of a hemisphere-bottomed cup has been analyzed fur various combinations of die design parameters. The length of the land of die, the clearance between punch and die and the clearance between the blank holder and die are optimized to minimize the forming load. The results of the simulations are verified with the experiments which are scaled down to one tenth of the actual size.

자동차 보닛금형의 자동설계 지원시스템에 관한 연구 (A Study on the Automatic Design Supporting for Automobile Bonnet Tools)

  • 정효상
    • 한국정밀공학회지
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    • 제21권5호
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    • pp.131-141
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    • 2004
  • In this study a 3-D automatic die design supporting system for a bonnet panel has been developed using Pro/ROGRAM of the widespread CAD software Pro/ENGINEER A standard drawing die was defined in terms of the punch profile, the die face geometry, and the blank sheet size. The strip layout of a trimming die was defined, in addition, in terms of the trimming line and the locations of scrap cutters. Necessary relations for each design step are formulated and rules for bottom-up type 3-D die design were set up for the automatic design of drawing and trimming dies of a bonnet. With the input geometric data of punch profile, die face, and blank sheet, this 3-D design supporting system could complete the basic design process, in case of the bonnet drawing die, in a time 78% shorter than that required by a typical 2-D CAD system. The new design system showed remarkable design efficiency also when it was applied to the case of redesign and modification of the previous standard output for a different car type.

Preparation and Application of ACFs Derived from the Petroleum Pitch and the Organometallic Compounds

  • Hong, Ik-Pyo;Ha, Baik-Hyon
    • Carbon letters
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    • 제3권3호
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    • pp.146-151
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    • 2002
  • Activated carbon fibers were prepared from the petroleum isotropic pitch and organometallic compounds. The metalsvwere dispersed uniformly in the ACFs. The specific surface area and pore size distributions of metal containing ACFsvwere measured. The mesopores of ACFs were developed by Co, Ni, and Mn metals addition and the catalytic reactivityvof ACFs'SOx removal was increased by adding Ni and Pd metals. It was found that the mesopores did not work forvthe improvement of catalytic reactivity of ACFs' SOx removal with the blank experiment using the metal removedvACFs.

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리클라이너 용 섹터기어의 파인 블랭킹 성형을 위한 금형의 최적화 (Optimization of Mold for Fineblanking Forming of Sector Gear for Recliner)

  • 이관영;남기우;문창권
    • 동력기계공학회지
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    • 제15권6호
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    • pp.53-58
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    • 2011
  • To optimization of mlod for fineblanking forming of sector gear of recliner, it was analyzed the effect of clearance, V-ring height, V-ring position, blank holding force and counter punch force. In case of 0.003 mm of clearancs, the finest shear plane was obtained, but optimization between die and punch clearance was 0.005 mm. The height of V-ring was 0.7 mm. In case of increasing of hold force, the size of shear plane got better and the decrement of thickness became smaller. Both the size of shear plane and the decrement of thickness increased according to increasing of counter punch force.

PCD 공구를 이용한 티타늄 합금의 미세 가공 (Micro Machining of Titanium Alloy Using Polycrystalline Diamond Tools)

  • 문인용;김보현
    • 한국정밀공학회지
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    • 제30권3호
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    • pp.284-291
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    • 2013
  • Micro cutting of titanium alloy by polycrystalline diamond (PCD) tools was studied. Micro electro discharge machining (MEDM) was used to fabricate customized micro shaping tools from PCD blank. The tool was used to machine micro grooves on Ti alloy and the effects of depth of cut and machining length on tool wear, burr and surface roughness were studied. The shaping tool has cutting edge of a few ${\mu}m$. The crater size of the tool surface was increased with increasing capacitance of EDM machining conditions, which was used to control the surface roughness of the machined micro grooves.