IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0450927
(2008-04-18)
|
등록번호 |
US-8381560
(2013-02-26)
|
우선권정보 |
JP-2007-109632 (2007-04-18) |
국제출원번호 |
PCT/JP2008/057992
(2008-04-18)
|
§371/§102 date |
20091015
(20091015)
|
국제공개번호 |
WO2008/130055
(2008-10-30)
|
발명자
/ 주소 |
- Mizumura, Masaaki
- Kuriyama, Yukihisa
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
8 |
초록
▼
The present invention provides a hydroforming method able to increase the expansion ratio to obtain a complicated shape hydroformed product and able to reduce the number of steps of work, that is, a hydroforming method loading a metal pipe into a divided mold, clamping the mold, then applying an int
The present invention provides a hydroforming method able to increase the expansion ratio to obtain a complicated shape hydroformed product and able to reduce the number of steps of work, that is, a hydroforming method loading a metal pipe into a divided mold, clamping the mold, then applying an internal pressure and pushing force in the pipe axial direction to said metal pipe, comprising, in a first hydroforming step, expanding said metal pipe in one direction of said metal pipe cross-section to obtain an intermediate product having a circumferential length of 90% to 100% of the circumferential length of the product shape in all of the expanded part in the pipe axial direction and having a height greater than the height of the product in said one direction and at least part of the pipe axial direction, then, in a second hydroforming step, reducing the height in the one direction of said intermediate product in all or part of the pipe axial direction while shaping the product to the final product shape. Further, in the case of a shape including bending, a bending step is performed between the above first hydroforming step and second hydroforming step.
대표청구항
▼
1. A method of hydroforming a metal pipe to form a final product, in which a metal pipe is loaded into a divided mold, the mold is clamped, and then an internal pressure is applied in the metal pipe, and a pushing force is applied in an axial direction of the metal pipe, the metal pipe having an X a
1. A method of hydroforming a metal pipe to form a final product, in which a metal pipe is loaded into a divided mold, the mold is clamped, and then an internal pressure is applied in the metal pipe, and a pushing force is applied in an axial direction of the metal pipe, the metal pipe having an X axis along the axial direction of the metal pipe, and Y and Z axis in the metal pipe cross-section, the method comprising:in a first hydroforming step, expanding the metal pipe in an expanded direction in the Y axis only of the cross-section of the metal pipe to obtain an intermediate product, having an expanded part in the expanded direction, whereinthe expanded part has a circumferential length of 90% to 100% of the circumferential length of the shape of the final product in all of the expanded part in the metal pipe axial direction, and a height greater than the height of the final product in the expanded direction and at least part of the pipe axial direction,then, in a second hydroforming step, reducing the height in the expanded direction of the intermediate product and expanding at least in the Z axis direction in all or part of the pipe axial direction while shaping the product to the final product shape. 2. The hydroforming method as set forth in claim 1, wherein a radius of curvature of a cross-section of the metal pipe and a radius of curvature of a cross-section in the expanded direction are substantially equal. 3. The hydroforming method as set forth in claim 1, further comprising shaping the pipe into the intermediate product with a movable mold able to freely move in the axial direction of the metal pipe and a counter punch able to freely move in a direction perpendicular to the axial direction of the metal pipe. 4. The hydroforming method as set forth in claim 1, further comprising bending the intermediate product in the pipe axial direction between the first hydroforming step and second hydroforming step.
이 특허에 인용된 특허 (8)
-
Bruggemann,Charles J., Hydroformed tubular members and method of hydroforming tubular members for vehicles.
-
Kojima Masayasu,JPX ; Inoue Saburo,JPX, Method and apparatus for hydroforming metallic tube.
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Klaas Friedrich,DEX ; Bogel Helmut,DEX ; Weber Georg,DEX, Method for internal high-pressure deforming of hollow offset shafts made of cold-deformable metal.
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Ni,Chi Mou; Strzelecki,Edward J., Method of progressive hydro-forming of tubular members.
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Schulze, Bernd; Van Veldhuizen, Hendrik Bart, Process for deforming a piece of thin-walled metal tube.
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Miyanaga,Kenji; Maruyama,Manabu; Hori,Izuru; Kanai,Yuji; Mizutani,Kouki, Process for forming tubular member.
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Tomizawa,Atsushi, Profile mother pipe for hydraulic bulging, hydraulic bulging apparatus using the same, hydraulic bulging method, and hydraulic bulged product.
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Gejima, Fumihiko; Sakurai, Hiroshi; Kuno, Masaki, Reinforced member.
이 특허를 인용한 특허 (1)
-
Mair, Scott; Gallagher, Steven William; Clement, Joshua Jacob; Bogachuk, Vladimir Vladimirovich; Wilcox, Jon A., Hydroform tube and method of forming.
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