[특허]Apparatus for piercing hydroformed part

Apparatus for piercing hydroformed part 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B21D-028/28
출원번호	US-0250211 (1994-05-26)
발명자 / 주소	Shimanovski Bruce S. (Southfield MI) Winterhalter Sr. George T. (Berkley MI) Shah Sanjay M. (Rochester Hills MI) Nunley Ranny J. (Berkley MI)
출원인 / 주소	General Motors Corporation (Detroit MI 02)
인용정보	피인용 횟수 : 40 인용 특허 : 0

초록 ▼

An apparatus for in-die piercing of a tube as it is hydroformed creates a sharp edged, non countersunk hole, while sealing against pressurized fluid loss and ejecting the slug cleanly from the apparatus. A sharp edged die button inset into one of a pair of die blocks includes a hole shaped cutting edge surrounded by a compliant face seal flush with the cavity between the die blocks. A plunger is slidable within a central bore in the die button from a closed position flush with the cutting edge to a partially retracted pierce position, and finally to a further retracted ejection position. An ejection chute in the same die block opens into the bore at one end, at a point between the pierce and ejection positions of the plunger, and also opens at the other end out of the die block. The plunger is sealed relative to the die button bore. The plunger is retained in closed position until the tube is fully hydroformed to final shape, and the outer surface of the tube engages the face seal. Then, the plunger is retracted to pierce position, allowing a slug to be blown out through the cutting edge. The face seal and plunger seal prevent the loss of fluid. Then, the tube is de pressurized, and the plunger retracts farther, allowing the slug to be ejected.

대표청구항 ▼

An apparatus for hydroforming a tube and simultaneously piercing a hole therethrough, comprising, a pair of die blocks that can be closed to form a sealed die cavity, one of said die blocks also having a plunger bore that opens into said cavity across a sharp cutting edge flush with the surface of said die block and matching the desired hole shape to be pierced, said die block further having a compliant face seal surrounding and substantially flush with said cutting edge, said die block also having an ejection chute that opens at one end into said plunger bore at an ejection point below said cutting edge and which opens at the other end outside of said die block, a plunger slidable within said bore with a forward end that mates flush with said cutting edge in a closed position and having a compliant ring seal that engages said bore, means for selectively retracting said plunger forward end from said closed position, to an intermediate position between said cutting edge and said ejection point, and then to an ejection position located below said ejection point, whereby, said tube may be placed in said die cavity, while said plunger forward end is closed and said tube is pressurized internally until sufficient pressure is attained to expand said tube into said cavity and engage its outer surface with said face seal, after which said plunger forward end is retracted to its intermediate position to allow a slug to be pierced through said cutting edge and against said plunger forward end, after which said tube is depressurized and said plunger forward end is retracted farther to its ejection position to carry said slug to said ejection point to allow it to be ejected through said ejection chute while said die blocks remain closed.

이 특허를 인용한 특허 (40)

Ghiran,Mike M.; Larsen,Paul D.; Jensen,David R.; Harmon,Gerry A.; Shah,Sanjay M.; Kent,Terry A., Apparatus and method for hydroshearing and hydrotrimming for hydroforming die.
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Ghiran,Mike M.; Harmon,Gerry A., Center support punch assembly for hydroforming die.
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Schult, Jens; Schwarz, Stefan, Device for punching work pieces in an internal high-pressure forming tool.
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Durand Robert D. ; Marando Richard A. ; Hetrick ; III George M. ; Lapic Stephen M., Engine cradle for vehicle body and frame assembly and method of manufacturing same.
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Freeman Richard B. ; Handley Mark C., Forming technique using discrete heating zones.
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Higgins Terry, Heat exchanger with an integrated tank and head sheet.
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Higgins Terry, Heat exchanger with an integrated tank and head sheet.
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Engel Bernd,DEX ; Lackner Martin,DEX, Hole punch for high-pressure shaping tool.
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Kocer Bruce D. ; O'Connor James P. ; Bihrer Hans Otto, Hydroformed control arm.
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Beckman John A. ; Marando Richard A., Hydroformed engine cradle and cross member for vehicle body and frame assembly.
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Marando Richard A., Hydroforming apparatus having in-die hole piercing capabilities and a slug ejection system using hydroforming fluid.
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Janssen, Andrease G.; Horton, Frank A., Hydroforming flush system.
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Glenn Mark Krcek ; Romuald Gmurowski ; Bruce Steven Shimanovski ; Mircea M Ghiran, Hydroforming, in-die hydropiercing and slug-ejecting method and apparatus.
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Ghiran, Mircea M.; Mellas, Spyros P.; Jensen, David R., Hydrotapping power unit.
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Ghiran,Mircea M.; Mellas,Spyros P.; Jensen,David R.; Larsen,Paul D., Hydrotapping power unit.
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Ghiran, Mircea M.; Shimanovski, Bruce S.; Krcek, Glenn M., In-die hydropiercing apparatus with prepiercing adjustment.
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Freeman Richard Benjamin, Internal hydroformed reinforcements.
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Abe, Shoichi; Watanabe, Yasushi; Shimoii, Kazumi; Tomizawa, Atsushi; Uchida, Mitsutoshi, Manufacturing method for metal member with through hole.
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Murray R. Mason CA, Method and apparatus for forming a tube having an article inserted therein.
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Klages Gerrald A.,CAX ; Longhouse Blair J.,CAX, Method and apparatus for forming opposing holes in a side wall of a tubular workpiece.
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Ghiran Mircea ; Oberski Paul C, Method and apparatus for forming unobstructed holes in hollow hydroformed metal parts.
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Ghiran Mike Mircea ; Shah Sanjay Mahasukhlal ; Joyner Reginald Clark, Method and apparatus for hydrotrimming and hydroshearing.
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Baumann Rainer,DEX ; Rilk Martin,DEX, Method and apparatus for producing a header with openings.
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Griskiewitz,Thomas; Lohse,Thomas; Schwarz,Stefan, Method and device for creating a hole on the outer circumference of a hollow profile.
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Huelsberg Thomas,DEX ; Puenjer Ralf,DEX, Method and device for removing a slug from a hydroforming tool.
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Mellas,Spyros P.; Benton,Paul A.; Bruggemann,Charles J.; Goebel,Mark; Lendway, IV,Joseph M.; Ngo,Tuan A.; Parlow,Peter M.; Robinson,Carl W., Method for forming a complex-shaped tubular structure.
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Krcek Glenn Mark ; Shimanovski Bruce Steven ; Shah Sanjay Mahasukhlal ; Winterhalter ; Sr. George Thomas, Method for machining an "O" ring retention groove into a curved surface.
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Giusti, Dino, Method for obtaining an opening in a hollow-body member, and a hollow-body member provided with one or more openings obtained with said method.
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Shah Sanjay Mahasukhlal (Rochester Hills MI) Lovell Michael Harry (Leonard MI) Malone Thomas James (Shelby Township ; Macomb County MI), Method for piercing two aligned holes in a hydroformed tube.
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Moses David G., Method of hydroforming a front axle beam.
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DiCesare, Giovanni, Method of producing tailored tubes.
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Bihrer Hans Otto, Multi-piece hydroforming tool.
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Schafer August Wilhelm,DEX ; Scholz Hans Werner,DEX ; Handel Adolf,DEX, Pressure forming and piercing a hollow body.
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Baumann, Christian; Heitmann, Thomas; Kratzsch, Klaus-Achim, Propellant charge igniter.
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Ghiran, Mircea M; Kent, Terry Andrew; Kaufman, Benjamin D, Punch for piercing and sealing hydroformed parts.
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Coelho,Jose U.; Dunn,David J.; Bliss,Martin L., Punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom.
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Coelho,Jose U.; Dunn,David J.; Bliss,Martin L., Punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom.
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Beckman John A., Vehicle frame assembly.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Apparatus for piercing hydroformed part 원문보기

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Apparatus for piercing hydroformed part 원문보기

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이 특허를 인용한 특허 (40)

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