• Title/Summary/Keyword: Fine Blanking Die

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A Study on the Steps of Shear Deformations Behavior of Fine-Blanking Process (Fine-Blanking시 전단 단계별 변형 거동에 관한 연구)

  • 이종구;박원규
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.11 no.4
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    • pp.26-33
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    • 2002
  • One characteristic of Fine-Blanking is that the size and the direction of stress and strain are very complex in the plastic flow according to the condition of blanking. Especially, they are affected by the clearance of punch and die, by the force of blanking holder and by the force of counter punch. The purpose of this research is to how the deformation behavior in shear zone more clearly, based on Green & Cauch's large deformation theory. The deformation behavior and cracks were investigated in each step of shear, according to punch penetration increase, the use of V-indenter ring and the hardness of materials. This research found that the transforming behavior was the same as pure discretion and the cracks could be prevented when hardness is low.

A study on properties of sector gear for seat recliner (Seat recliner용 sector gear의 fine blanking에 관한 연구)

  • Kim, Chang-ho;Kang, Soo-ho;Lee, Kwan-young;Nam, Ki-woo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.9 no.1
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    • pp.99-105
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    • 2010
  • This study was performed to solve the breaking problem in the fine blanking(FB) process of sector gears for car seat recliner using nickel chrome molybdenum steel(SNCM220) plate. The optimal design of embossing circle is changed to oval with labors' experiences and finite element analysis. The maximum principal stress and effective strain in a forming process are analyzed by commercial finite element software to solve the problems in embossing stage of FB process. As a result of FE analysis, the maximum principal stress in forming is lower than yield point of material. It is shown from experiments in the modified die that the formed gear does not break in embossing stage.

State recognition of fine blanking stamping dies through vibration signal machine learning (진동신호 기계학습을 통한 프레스 금형 상태 인지)

  • Seok-Kwan Hong;Eui-Chul Jeong;Sung-Hee Lee;Ok-Rae Kim;Jong-Deok Kim
    • Design & Manufacturing
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    • v.16 no.4
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    • pp.1-6
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    • 2022
  • Fine blanking is a press processing technology that can process most of the product thickness into a smooth surface with a single stroke. In this fine blanking process, shear is an essential step. The punches and dies used in the shear are subjected to impacts of tens to hundreds of gravitational accelerations, depending on the type and thickness of the material. Therefore, among the components of the fine blanking mold (dies), punches and dies are the parts with the shortest lifespan. In the actual production site, various types of tool damage occur such as wear of the tool as well as sudden punch breakage. In this study, machine learning algorithms were used to predict these problems in advance. The dataset used in this paper consisted of the signal of the vibration sensor installed in the tool and the measured burr size (tool wear). Various features were extracted so that artificial intelligence can learn effectively from signals. It was trained with 5 features with excellent distinguishing performance, and the SVM algorithm performance was the best among 33 learning models. As a result of the research, the vibration signal at the time of imminent tool replacement was matched with an accuracy of more than 85%. It is expected that the results of this research will solve problems such as tool damage due to accidental punch breakage at the production site, and increase in maintenance costs due to prediction errors in punch exchange cycles due to wear.

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

  • Lee, Chun-Kyu;Kim, Young-Choon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.8
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    • pp.3650-3655
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    • 2013
  • A state purpose to produce fine blanking die gets to be the maximum size of share surface the study considered that change a size of share area. the clearance affecting most greatly size of share surface fixing as 1% of material thickness and while change share speed, A distance change from share line to V-ring center, A change of V-ring angle. it designed. Each test specimen taken from the share surface size analysis of the V-ring distance of 2mm, the outer $45^{\circ}$ / inner$30^{\circ}$ if the, Shear speed was found that the area of the entire cross section is largest the 6.4m/min.

A study on the fine-shearing characteristics of a micro sheet metal under shearing force analysis (전단력 분석을 토한 미세박판의 정밀 전단 특성 연구)

  • 신용승;김병희;김헌영
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.494-497
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    • 2000
  • This paper presents the fine-shearing experimental investigation using brass sheets. Shearing including blanking, trimming, piercing, etc is one of the most frequently used processes in sheet metal manufacturing. In this study, an individual set of tooling was designed and fabricated to carry out experiment for shearing process. In order to investigate the effect of shearing surface correspond to die clearance, the profile of shearing surface was examined by using microscope. Futhermore, the relationship between shearing force and the profile of shearing surface was considered.

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산업부문 B2B 시범사업 소개 - 금형업종 -

  • 류병우
    • Proceedings of the CALSEC Conference
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    • 2001.08a
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    • pp.105-109
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    • 2001
  • 성형의 종류 ◈금속 성형 ㆍ 스탬핑(Stamping) ㆍ 정밀 블랭킹(Fine Blanking) ㆍ 딥 드로잉(Deep Drawing) ㆍ 다이캐스팅(Die Casting) ㆍ 인베스트먼트 주조(Investment Casting) ㆍ 분말 야금(Power Metallurgy) ㆍ 인발(Wire Drawing) ㆍ 압출(Extrusion) ㆍ 단조(Forging) ㆍ ㆍ코이닝(Coining) ㆍ... ◈비금속 성형 ㆍ 사출(Injection) ㆍ 압축(Compression) ㆍ 블로우 성형(Blow Molding) ㆍ 진공 성형(Vacuum Molding) ㆍ 발포 성형(Foam Molding) ㆍ 피복(Encapsulation) ㆍ 회전식(Rotational) ㆍ 주조(Casting) ㆍ 적층(Laminating) ㆍ 압출(Extrusion) ㆍ...(중략)

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Development of Perforating Die for Manufacturing Fine Multi-perforated type Nail Files (미세 다수공 타입의 네일파일 제조용 퍼퍼레이팅 금형 개발)

  • Kim Sei-Hwan
    • Proceedings of the KAIS Fall Conference
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    • 2004.06a
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    • pp.42-46
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    • 2004
  • 0.5mm thick steel is used to manufacture nail files. The first process is blanking the blank and then make about 300 holes of 0.8$\~$1.0mm in diameter. This process depends mainly on etching which takes $33\%$ of manufacturing cost and it can make manufacturing cost rise. The residual etching reagent is not environmentally friendly and the steel material is apt to rust as well. The key accomplishments of this research are to change the material from steel to stainless and develop a progressive perforating die in place of etching process.

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Development of Perforating Die for Manufacturing Fine Multi-perforated type Nail Files (미세 다수공 타입의 네일파일 제조용 퍼퍼레이팅 금형 개발)

  • 김세환
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.5 no.4
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    • pp.309-314
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    • 2004
  • 0.5mm thick steel is used to manufacture nail files. The first process is blanking and the second process is making about 300 holes of 0.8-l.0mm in diameter. This process depends mainly on etching which takes 33% of manufacturing cost and it can make manufacturing cost rise. The residual etching reagent is not environmentally friendly and the steel material is apt to rust as well. To solve these problems, researches on the following subjects are performed: proper material to prevent from rusting and strip layout strategies in stamping to replace etching process with press process which makes use of die. And new quill type punch is developed to replace the regular standard punch, one of the die parts, which frequently get broken while working. And these researches and developments lead to develop a progressive perforating die.

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A study on the effect of V-ring position on die roll height in the fine blanking for automobile seat recliner gear (자동차 시트 리클라이너 기어의 파인 블랭킹 성형에서 V-링 설치 위치가 다이롤 높이에 미치는 영향에 관한 연구)

  • Kim, Jong-Deok;Kim, Heung-Kyu;Chang, Sung-Ho
    • Proceedings of the KAIS Fall Conference
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    • 2011.05b
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    • pp.824-827
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    • 2011
  • 본 논문에서는 자동차 시트 리클라이너 기어의 파인 블랭킹 성형 실험을 통하여 V-링 설치 위치에 따른 기어의 다이 롤 높이 변화를 검토하였다. 3 종류의 다이 편과 가이드 플레이트 편을 설계하여 파인 블랭킹 금형을 제작하였으며 650 ton 파인블랭킹 프레스에서 성형 실험을 수행하였다. 실험으로부터 제품을 취출하여 다이 롤 높이를 측정하여 분석한 결과 기어 모듈과 관계없이 V-링 설치 위치가 가이드 플레이트에서 멀어짐에 따라 다이 롤 높이가 증가함을 파악할 수 있었다. 이와 같은 결과는 향후 파인 블랭킹 금형의 V-링을 설계할 때 다이 롤 높이를 최소화하기 위하여 유용하게 활용될 수 있을 것이다.

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Parameter Investigation of Burr Formation on Sheet Metal Shearing Process (미세박판 전단시의 버 발생 인자에 관한 연구)

  • Kim H. Y.;Kim B. H.;Shin Y. S.;Oh S. I.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2001.05a
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    • pp.231-234
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    • 2001
  • Shearing, including blanking, trimming, piercing, etc, is one of the most frequently used processes in sheet metal manufacturing. In this paper, an individual set of tooling with an in-die sensor was designed and precisely fabricated to carry out the experiment for the shearing process investigation. Through various experiments, it has been examined the influence of process parameters such as clearance, edge material properties and pad configuration. Since the tension between the part and the scrap increases when the clearance increases, the clearance should be selected properly in order to reduce the burr height. Also removal of the lower pad makes the sheared surface worse and the shearing system unstable. The shearing force increases when the clearance decreases and the friction of the tooling material decreases. Dynamic reaction force is also important to obtain the fine sheared surfaces.

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