Die(금형) for Sheet metal

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Presentation transcript:

Die(금형) for Sheet metal Single operation Stamping Die Press Machine Die is used for multiple station operation of shearing, bending and drawing. Progressive Die Transfer Die http://www.youtube.com/watch?v=q5Wlr6Co5SI&hl=ko

Stamping Die (프레스 금형) Lower die Automotive panel forming process: Drawing → Trimming → Hemming → Punching Draw die = upper die + lower die + blank holder Blank holder Upper die 자동차의 차체 패널은 드로잉(drawing), 트리밍(trimming), 헤밍(hemming), 펀칭(punching) 등 통상 3~4단계의 프레스 공정을 거쳐서 만들어진다. 트림 다이, 피어스다이 중간공정 또는 최종 프레스 공정에서 제품을 필요형상으로 만들기 위하여 전체 둘레 또는 부분 적으로 스크랩(scrap))부분을 절단하는 가공 틀을 트림 다이(trim die)라 하고 가공재료에 구멍을 뚫는 금형을 피어스 다이(pierce die)라고 한다. 피어싱 가공은 상형다이에 펀치 리테이너 (retainer)와 피어스 펀치 (pierce punch)를 설치하고 하형 다이에 버턴다이(button die)를 설치 하여 가공재료에 구멍을 뚫는 작업이며, 뽑힌 부분이 스크랩이 되고 뚫린 구멍이 제품 역할을 하게 된다. 프레스 기계에 의한 피어싱에 있어서는 동시에 여러 개의 구멍을 뚫을 수 있지만 여기에는 제작 조건도 따른다. 이러한 가공들은 가공면이 기울어졌거나 형상에 따라서는 옆에서 절단해야 할 경우에는 고도의 기술을 필요로 하는 전단(shear)가공의 하나이다. 드로우 금형(draw die)의 구조는 제품 성형을 위한 상형(upper die)과 하형(lower die), 그리고 판재를 붙잡아주는 블랭크 홀더(blank holder)로 구성된다. • 쿠션 핀(cushion pin): 프레스 하부 베드(bed) 위에 위치하여 일정한 압력으로 블랭크 홀더를 밀어 성형이 가능하도록 하는 봉 형태의 핀. • 핀 후크(pin hook): 금형을 반전 또는 이송하기위해 설치된 구조물. • 유 클램프(U clamp): 금형을 프레스 장비에 체결하기 위해 사용되는 홈 형태의 구조물. • 로케이션 슬롯(location slot): 금형의 조립 시 대각선 방향으로 설치하여 공차만큼의 움직임을 주어 금형의 완만한 조립을 돕는 구조물. • 삼각 리브(triangle rib): 금형 구조에서 취약부위에 보강용으로 쓰기 위해 설치하는 구조물. • 다이 페이스(die face): 판재의 주름 및 기타 성형불량 현상을 제어하는 면으로서 제품 형상면을 제외한 펀치의 상단면. • 웨어 플레이트(wear plate): 상형 다이와 블랭크홀더, 하형 펀치와 블랭크 홀더 사이에서 블랭크홀더가 상하로 움직이는 것을 안내하면서 윤활 역할을 하는 부품. • 가이드 힐(guide heel): 금형의 상형과 하형 또는 상형과 블랭크 홀더를 조립할 때 상호간의 정확한 위치를 잡아 결합시키고, 또한 결합 시 각 금형 사이에 발생하는 밀림을 방지하거나 완화시키기위해 설계되는 구조물. • 게이지(gauge): 금형에 사용하는 안내판 또는 위치 결정 장치로 패널의 위치를 결정하고 판재(blank)의 투입유무 감지하는 장치. http://www.youtube.com/watch?v=ydoEJnwMlnk Press Draw die

Press Machine (프레스) Crank press Hydraulic press

Progressive Die (순차이송 금형) Multiple operation such as punching, bending, blanking. http://www.youtube.com/watch?v=BDIYBloDydM&hl=ko

Progressive Die Design Part analysis (Unfolding)  Strip layout  Punch  Die set

Transfer Die (트렌스퍼 금형) The large sheet metal part is transferred to next station after an operation by transfer machine. http://www.youtube.com/watch?v=MTPQfEwxtf8&hl=ko

Design Considerations (설계) Guidelines for design issues of sheet-metal forming operations: Punching Bending Progressive-die operations Deep drawing

FEM diede.es

Economics (경제성) Cup-shaped part can be produced by deep drawing, spinning. Automotive or aircraft panel can be produced by drawing, stretch forming. Cost per part Spinning Drawing 1 500 1,000 2,000 3,000 4,000 Number of parts

References 삼도프레스: www.samdopress.co.kr 장비 AMADA: www.amada.co.kr 장비 IDETEC: www.dietec.co.kr 프래스금형