• 제목/요약/키워드: Multi-stage drawing process

검색결과 62건 처리시간 0.025초

휴대폰용 초정밀 사각 밧데리 케이스의 ???K드로잉 공정설계 (Process Design for Deep Drawing of High Precision Rectangular Battery Case used in Cellular Phone)

  • 김홍주;구태완;강범수
    • 한국소성가공학회:학술대회논문집
    • /
    • 한국소성가공학회 2000년도 추계학술대회 논문집
    • /
    • pp.97-100
    • /
    • 2000
  • Today deep drawing and ironing are the major process in manufacturing of battery case used in cellular phone from aluminum. The same technology is utilized in manufacturing of steel or aluminum cans for components of medical instrument, portable PC, walkman and so on. Most of these processes require multi-stage ironing following the deep drawing and redrawing processes. The practical aspects of this technology are well known and gained through extensive experiment and production know-how. However, the fundamental aspects of theses processes are relatively less known. Thus, it is expected that process simulations using FEM techniques would provide additional detailed information that could be utilized to improve the process condition. This paper illustrates the application of process modeling to deep drawing and redrawing operations for High Precision Rectangular Battery Case. A commercially avaliable finite element code LS-DYNA3D was used to simulate deep drawing and redrawing operations.

  • PDF

카세트롤러와 홀다이를 이용한 원형소재에서 사각형 단면 인발 비교 (Comparison of Square Section Drawings from Circular Billets through Cassette-Roller-Dies and Hole Die)

  • 최종인;한철호
    • 한국소성가공학회:학술대회논문집
    • /
    • 한국소성가공학회 2001년도 추계학술대회 논문집
    • /
    • pp.208-211
    • /
    • 2001
  • In the drawing from round billet to non-circular section there are two different processes through solid hole die(HD) and the other cassette roller dies(CRD). The CRD process has several cassette type rollers and a billet is able to move through the given gaps between two profiled rollers. The objective of this study is based on the analysis and evaluation of two aforementioned processes using experiments and finite element simulation. In order to simulate the multi-stage drawing process from circular sectioned billet to rounded square section, the finite element analysis is applied to the process using a commercially available DEFORM-3D code. Two types of experimental drawing tests through designed and manufactured dies for pure copper and aluminum alloy are carried out at room temperature. The analysis included comparison of material properties before and after drawing of each process and also provide some useful information by a FEM simulation.

  • PDF

타원형 다단 딥 드로잉 제품의 성형성 향상을 위한 초기 소재 형상 최적 설계 (Optimization of Initial Blank Shape of Multi-stage Deep Drawing for Improvement of Formability)

  • 이사랑;박상민;홍석무
    • 한국산학기술학회논문지
    • /
    • 제17권10호
    • /
    • pp.696-701
    • /
    • 2016
  • 다단계 딥 드로잉(multi-stage deep drawing)은 산업현장에서 대형의 금속 제품 뿐만 아니라 소형의 제품에 까지 많은 제품으로 확대되고 있는 제조 공정 중 하나이다. 예를 들어, 스마트 폰에 사용되는 USB-C형 소켓은 매우 작고, 정밀하며 세장비가 큰 부품이며, 이 제품은 타원형 다단계 딥드로잉 방법으로 제조된다. 다단계 딥 드로잉에 최종 제품의 두께 분포를 보장하기 위해서 다단계 딥드로잉 전체 공정에서 제품의 두께 분포가 균일하게 유지되어야 한다. 따라서 첫 번째 드로잉 작업 후에 타원형 제품의 장변과 단변쪽 측벽의 높이 차를 최소화하는 것은 최종 제품의 균일한 두께를 보장하는 가장 중요한 공정 설계 인자이다. 본 연구에서는 첫 번째 드로잉 공정 후 소재가 균일한 높이를 지속적으로 유지될 수 있도록 하기 위해서 유한요소해석을 기반으로 초기의 타원형 소재 형상 결정에 대한 최적 설계를 수행하였다. 최적 설계된 초기 블랭크 형상으로 성형된 제품의 경우 전체 균일한 두께 분포를 가질 뿐만 아니라 드로잉 후 제품의 장변과 단변의 높이 단차가 최소화 되었다. 최종적으로 최적 설계로 예측된 초기 소재 형상은 실제 실험 결과와 비교하여 검증되었고, 매우 양호한 결과의 일치를 보여주었다.

A Study on the Development of Progressive Die for Multi-Stage Forming

  • Sim, Sung-Bo;Jang, Chan-Ho;Sung, Yul-Min;Lee, Sung-Taeg
    • 한국해양공학회:학술대회논문집
    • /
    • 한국해양공학회 2002년도 춘계학술대회 논문집
    • /
    • pp.86-91
    • /
    • 2002
  • The production part requiring multiple processes such as piecing, blanking and notching, are performed with a high production rates in progressive die. In order to prevent the dejects of process result, the optimum of strip process layout design, die design, die making, and tryout with inspection etc. are needed. According to these factors of die development process, they required theory and practice of metal working process and its phenomena, die structure, machining conditions for die making, die materials, heat treatment of die camponents, know-how and so on. In this study, we designed and analyzed die camponents also simulated the strip process layout of multiple stage drawing by DEFORM. Especially the result of tryout and its analysis become to the feature of this study.

  • PDF

연성파괴에 기반한 다단 디프드로잉 및 아이어닝 공정에 의한 알루미늄 라이너 개발 (Development of an Aluminum Liner using Multi-drawing and Ironing Processes based on the Ductile Fracture Criterion)

  • 윤여웅;강성훈;윤춘기;이정환
    • 한국소성가공학회:학술대회논문집
    • /
    • 한국소성가공학회 2009년도 추계학술대회 논문집
    • /
    • pp.403-407
    • /
    • 2009
  • In this work, finite element investigations were carried out to manufacture a seamless aluminum liner without crack generation using four-stage deep drawing followed by two-stage ironing process. In order to predict the crack generation during the liner manufacturing process, the Normalize Cockroft-Latham(NCL) which is one of ductile fracture criteria was adopted. In addition, the tensile tests were carried out to obtain the critical value of NCL by comparing the experimental and FE simulation results. From this, various case studies based on FE simulation were carried to obtain the optimum die designs which can prevent the crack generation during ironing processes. Finally, the aluminum liner was successfully made using obtained die designs so that requirements were met in terms of thickness and height of the liner.

  • PDF

세장비가 큰 사각케이스 성형을 위한 초기 블랭크의 설계 및 개선에 관한 연구 (A Study on Initial Blank Design and Modification for Rectangular Case Forming with Extreme Aspect Ratio)

  • 구태완;박철성;강범수
    • 소성∙가공
    • /
    • 제13권4호
    • /
    • pp.307-318
    • /
    • 2004
  • Rectangular drawn case with extreme aspect ratio is widely used for electrical parts such as a lithium-ion battery container, semi-conductor case and so on. Additionally, from the recent trend towards miniaturization of the multi-functional mobile device, demands for rectangular case with the narrow width are increased. In this study, numerical and experimental approaches for the multi-stage deep drawing process have been carried out. Based on the research results of the width of 5.95mm model, finite element analysis for storage case of rectangular cup type was verified to the width of 4.95mm. Also, a series of manufacturing experiments for rectangular case is conducted and the deformed configuration of the rectangular drawn case are investigated by comparing with the results of the numerical analysis. And the modification of the initial blank is performed to minimize the trimmed material amount. By the application of the modified blank, the sound shape of the deformed parts is improved.

A Study on the Development of Multi-pilotting-type Progressive Die for U-bending Part Process

  • Sim, Sung-Bo;Lee, Sung-Taeg;Jang, Chan-Ho
    • 한국기계가공학회지
    • /
    • 제2권2호
    • /
    • pp.45-51
    • /
    • 2003
  • The multi-piloting type progressive die for U-bending sheet metal production part is a very specific division. This study reveals the sheet metal forming process with multi-forming die by center carrier type feeding system. Through the FEM simulation by DEFORM, it was accepted to u-bending process as the first performance to design of strip process layout. The next process of die development was studied according to sequence of die development, i.e die structure, machining condition for die making, die materials, heat treatment of partially die components, know-how and so on. The feature of this study is the die development of scrapless progressive die of multi-stage through the modeling on the I-DEAS program, components drawing on the Auto-LISP, CAD/CAM application, ordinary machine tool operating and revision by tryout.

  • PDF

다단 성형 공정 시 고-Mn 강의 타원형 용기 헤드에서의 변형률 분포: 유한요소해석 (Strain Evolution in High-Mn Steel Ellipsoidal Vessel Head during Multi-forming Process: A Finite Element Analysis)

  • ;;최시훈
    • 소성∙가공
    • /
    • 제32권5호
    • /
    • pp.268-275
    • /
    • 2023
  • ISO 21029 cryogenic vessel is used to transport cryogenic fluids. High-manganese steel (High-Mn steel) is widely regarded as suitable for use at cryogenic temperatures. The conventional way of manufacturing an ellipsoidal vessel head involves incremental stretching, followed by a spinning process. In this study, an alternative method for forming an ellipsoidal vessel head was proposed. Finite element analysis (FEA) was used to theoretically examine the strain evolution during a multi-stage forming process, which involved progressive stretching, deep drawing, and spinning of High-Mn steel. The distribution of effective strain and strain components were analyzed at different regions of the formed part. The FEA results revealed that only normal strains were evident in the dished region of the vessel head due to the stretching process. However, the flange region experienced complex strain evolution during the subsequent deep drawing and spinning process.

Cellular Phone 및 IMT-2000용 초정밀 사각 밧데리 케이스 성형공정 해석 (FE Analysis of The Forming Process of The High Precision Rectangular Battery Case used in Cellular Phone and IMT-2000)

  • 김홍주;구태완;강범수
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2000년도 추계학술대회논문집A
    • /
    • pp.778-782
    • /
    • 2000
  • Deep drawing and ironing are the major process used today in manufacturing of battery case used in cellular phone and IMT-2000 from aluminum. The same technology is utilized in manufacturing of steel or aluminum rectangular cans for components of medical instrument, portable PC, walkman and so on. Most of these processes require multi-stage ironing following the deep drawing and redrawing processes. The practical aspects of this technology are well known and gained through extensive experiment and production know-how. However, the fundamental aspects of theses processes are relatively less known. Thus, it is expected that process simulations using FEM techniques would provide additional detailed information that could be utilized to improve the process condition. This paper illustrates the application of process modeling to deep drawing and redrawing operations with the cellular phone and IMT-2000. A commercially avaliable finite element code LS-DYNA3D was used to simulate deep drawing and redrawing operations.

  • PDF

휠볼트 제작을 위한 공정설계 자동화 시스템 개발 (Development of an Automated Process Planning System for Manufacturing Wheel Bolt)

  • 박성관;박종옥;이준호;정성윤;김문생
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 2001년도 춘계학술대회 논문집
    • /
    • pp.983-987
    • /
    • 2001
  • This paper deals with an automated computer-aided process planning system by which designer can determine operation sequences even if they have little experience in process planning of wheel bolt products by a multi-stage former. The approach to the system is based on knowledge-based rules and a process knowledge base consisting of design rules is built. Knowledge for the system is formulated from plasticity theories, empirical results and the empirical knowledge of field experts. Programs for the system have been written in AutoLISP for the AutoCAD using a personal computer and are composed of two main modules. An attempt is made to link programs incorporationg a number of expert design rules to form a useful package. Results obtained using the modules enable the designer and manufacturer of wheel bolt product to be more efficient in this field.

  • PDF