• 제목/요약/키워드: Blanking

검색결과 222건 처리시간 0.028초

파인 블랭킹 금형의 V-링 위치 및 다이 챔퍼 형상이 다이 롤 높이에 미치는 영향에 관한 실험 연구 (An experimental study on the effect of V-ring position and die chamfer shape on the die roll height in fine blanking tool)

  • 김종덕
    • 한국산학기술학회논문지
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    • 제13권5호
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    • pp.2009-2014
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    • 2012
  • 기어의 파인 블랭킹에서 기능면으로 사용되는 전단면(잇 면)을 최대한 확보하기 위하여 다이 롤 높이(die roll height)의 최소화는 매우 중요하다. 본 논문에서는 파인 블랭킹 금형의 핵심 설계 요소인 V-링 위치와 다이 챔퍼(die chamfer) 형상에 따라 기어의 다이 롤 높이 변화를 고찰하기 위하여 V-링 거리와 다이 챔퍼 형상이 다른 여러가지 다이 편 및 가이드 플레이트 편으로 구성된 파인 블랭킹 금형 세트를 제작하여 실험하였다. 각 실험으로부터 시편을 채취하여 다이 롤 높이를 측정 분석한 결과 파인 블랭킹 기어의 다이 롤 높이는 각 모듈에서 다이 챔퍼 각도가 증가함에 따라 증가하고 V-링 거리가 증가함에 따라 증가됨을 알 수 있었다.

박판제품의 블랭킹 및 피어싱과 굽힘 가공을 위한 순차이송용 공정 및 금형 설계와 가공자동화 시스템 (A Progressive Automated-Process Planning and Die Design and Working System for Blanking or Piercing and Bending of Sheet Metal Product)

  • 최재찬;김철
    • 소성∙가공
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    • 제7권3호
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    • pp.246-259
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    • 1998
  • This paper describes a research work of developing a computer-aided design and manufacturing of irregular shaped sheet metal product for blanking or piercing and bending operations. An approach to the system is based on the knowledge-based rules. Knowledge for the system is formulated from plasticity theories experimental results and the empirical knowledge of field experts, This system has been written in AutoLISp on the AutoCAD and in customer tool kit on the SmartCAM with a personal computer and is composed of nine modules which are input and shape treatment, flat pattern-layout, pro-processor module. Based on the knowledge-based rules, the system is designed by considering several factors, such as material and thickness of product complexities of blank geometry and punch profile sheet metal to give flat pattern and automatically account for the adjustment of bending allowances to match tooling requirements by checking dimensions and generating NC data automatically according to drawings of die-layout module. Results carried out in each module will provide efficiencies to the designer and the manufacturer of blanking or piercing and bending die in this field.

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SNCM 강종의 파인블랭킹 전단부의 변형거동에 관한 연구 (A study on the Shear Zone Deformation Behavior Of Fine-Blanking Process Of SNCM 220)

  • 이종구
    • Design & Manufacturing
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    • 제6권1호
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    • pp.73-78
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    • 2012
  • The aim of this dissertation is inferring factors controlling the complex strain behavior of the material and the characteristics of the Fine-Blanking in the most narrow area at the shear zone where we are performing the Fine-Blanking. And also this is for inspecting and presenting their uses and the possibilities to make the results data based in order to utilize easily. Therefore, to analyze of shere zone's strain behaviour, the Fine-Blanking process need to be modelled defining the quadratic-nodded and axi-symmetrical elements as the problems of large deformation axi-symmetry and the non-linear contact. For the method of inputting strain-stress values of the material, the piece-wise linear technics were used, the Implicit-Finite Element method also used making balance of forces on each step by the long intervals, calculates and converges many times was done. The materials used for the analysis was the Steel SNCM220 5.5mm respectively. As the result of FEM analysis, we know that shear stress value in the beginning of punch penetration is distributed widely and done high both in the center of the late-thickness and on the both sides centering around shear strain zone as the punch penetration is increasing. Also.

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불규칙성 박판제품의 프로그래시브 다이설계를 위한 자동화된 CAD시스템 (An automated process planning 8 die design using expert system for blanking or piercing of irregular shaped sheet metal products)

  • 김재훈;김철;최재찬;김병민
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1995년도 추계학술대회 논문집
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    • pp.214-218
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    • 1995
  • Much labor, an exceedingly long lead time, and the skills of experienced engineers are required for press tool design. To reduce such problems, several CAD systems for blanking or piercing have been developed. This paper describes a computer-aided design for blanking or piercing of irregularly shaped sheet metal products. An approach to the system is based on knowledge base rules. The process planning & die design system is designed by considering several factors, such as complexity of blank geometry, punch profile, and availability of press equipment and standard parts. Therefore, after checking a production feasibility for irregular shaped sheet metal products, this system which is implemented strip layout module can carry out a process planning and generate the strip layout in graphic forms. Also this system implemented die layout module can carry out a die design for each process which is obtained form the result of an automated process planning and generate parts and assembly drawing of a die set.

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파인블랭킹 공정에서 전단면의 크기 변형에 관한 연구 (A Study on the share surface size deformation of Fine Blanking Process)

  • 이춘규;김영춘
    • 한국산학기술학회논문지
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    • 제14권8호
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    • pp.3650-3655
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    • 2013
  • 파인블랭킹 금형을 제작하는 주목적은 전단면의 크기를 최대가 되도록 하기 위함이다. 본 연구에서는 전단면의 크기에 가장 크게 영향을 미치는 클리어런스는 재료 두께의 1%로 고정시키고 전단라인에서 Vee-Ring 중심까지의 거리 변화, V-Ring 각도의 변화, 전단 속도를 변화시키면서 전단 면적의 크기 변화를 연구 고찰하였다. 각 실험으로부터 시편을 채취하여 전단면의 크기를 분석한 결과 V-링의 거리는 2mm, 각도는 외측$45^{\circ}$/내측$30^{\circ}$일 때, 전단 속도는 6.4m/min일 때 전단면의 크기가 가장 크게 됨을 알 수 있었다.

리드프레임 블랭킹 공정설계를 위한 전단영향인자의 실험적 평가 (An Experimental Evaluation of the Influences of Shearing Factors for the Process Design of Lead Frame Blanking)

  • 임상헌;서의권;심현보
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2001년도 춘계학술대회 논문집
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    • pp.679-682
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    • 2001
  • An experiment is carried out to investigate the influences of shearing characteristic factors for the process design of lead frame blanking in copper alloy C194(t=0.205mm). 3 process parameters, e.g., clearance between die and punch, strip holding pressure, and bridge allowance are selected for this study. From the basis condition 6% clearance, 20N/$mm^2$, and 1.5t bridge allowance the seven times of experiment are done by varying the each factor. The square shape specimen is used to study the characteristics of shearing factors. The ratios of roll over, burnish, fracture zone are measured after blanking. The experimental analysis shows that the burnish ratio is decreased as the clearance increases. And the larger strip holding pressure is shown that the roll over and burnish ratio are both decreased. It is found that an optimal strip holding pressure is need for large burnish zone. Finally it is shown that the bridge allowance is less affected than clearance and strip holding pressure.

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니켈합금 Alloy42를 사용하는 리드프레임의 블랭킹 특성에 관한 기초연구 (A Study on the Characteristics for the Blanking of Lead Frame with the nickel alloy Alloy42)

  • 반갑수;서의권;이광호;모창기
    • 한국공작기계학회논문집
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    • 제13권6호
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    • pp.87-93
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    • 2004
  • An experimental is carried out to investigate the characteristics of blanking for nickel alloy Alloy42 (t=0.203mm), a kind of IC lead frame material. By varying clearance between die and punch the shapes of shear profile are examined. Finite element analysis with element deletion algorithm for ductile fracture mode is also carried out to study the effect of clearance theoretically and to compare with experimental results. The rectangular shape specimen with four different comer radius is used to study the characteristics of blanking for straight side and comer region simultaneously. As the result the ratios measured k(m experiment of roll over, burnish and fracture zone based on initial blank thickness are compared with those of FE analysis. Both experiment and FE analysis show that the amount of mil over and fracture is increased as the clearance increases. When the radius of comer is less than thickness of blank it has been found that larger clearance is required than that of straight region in order to maintain same quality of shear profile at the comer region.

불규칙형상 박판제품의 블랭킹 및 피어싱용 CAD/CAM 시스템 (A CAD/CAM System for Blanking or Piercing of Irregular Shaped-Sheet Metal Products)

  • 최재찬;김철;박상봉
    • 한국정밀공학회지
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    • 제15권8호
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    • pp.174-182
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    • 1998
  • This paper describes a research work of developing a computer-aided design and machining of irregular shaped-sheet metal product for blanking or piercing operation. An approach to the CAD/CAM system is based on the knowledge-based rules. Knowledge for the CAD/CAM system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system has been written in AutoLISP on the AutoCAD and in customer tool kit on the SmartCAM with a personal computer and is composed of nine modules, which are input and shape treatment, flat pattern-layout, production feasibility check, blank-layout, strip-layout, die-layout, data conversion, modelling, and post-processor module. Based on knowledge-based rules, the system is designed by considering several factors, such as material and thickness of product, complexities of blank geometry and punch profile, diameter and material of a wire, and availability of press. This system is capable of generating NC data automatically according to drawings of die-layout module. Results which are carried out in each module will provide efficiencies to the designer and the manufacturer of blanking or piercing die in this field.

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