US20030094026A1 - Aluminum extrusion material for hydraulic bulge forming and hydraulic bulge forming method using the extrusion material - Google Patents
Aluminum extrusion material for hydraulic bulge forming and hydraulic bulge forming method using the extrusion material Download PDFInfo
- Publication number
- US20030094026A1 US20030094026A1 US10/233,480 US23348002A US2003094026A1 US 20030094026 A1 US20030094026 A1 US 20030094026A1 US 23348002 A US23348002 A US 23348002A US 2003094026 A1 US2003094026 A1 US 2003094026A1
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- US
- United States
- Prior art keywords
- hydraulic bulge
- bulge forming
- extrusion material
- hollow
- aluminum extrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/065—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes starting from a specific blank, e.g. tailored blank
Definitions
- the present invention relates to an aluminum extrusion material for hydraulic bulge forming, particularly to an aluminum extrusion material suitable for aluminum structural components for vehicles processed by hydraulic bulge forming, and to a hydraulic bulge forming method using the aluminum extrusion material.
- aluminum includes pure aluminum for industrial use and aluminum alloys.
- Hydraulic bulge forming is a technology for forming hollow materials in a prescribed shape.
- a hollow material such as a metal tube, a tubular material, or the like is set in a pair of metal molds, a fluid such as oil and water, for example, is fed to the hollow material under low pressure, and cylinders are inserted into the hollow material from both ends while discharging air from the hollow material to seal both ends.
- the pressure applied to the inside of the hollow material and the cylinder insertion pressure are controlled to form the hollow material into a desired shape.
- hollow materials are formed using only the hydraulic pressure without providing the cylinder insertion pressure.
- Hydraulic bulge forming which is also called hydro forming or hydrostatic bulge forming, can freely deform the cross-sectional configuration of a hollow material, enabling the hollow material to be formed into an integral object with a variety of shapes. Therefore, hydrostatic bulge forming can not only decrease production costs for various parts due to reduction of the number of the parts to be manufactured, but also increase reliability of the strength of the formed objects. For this reason, hydrostatic bulge forming is being widely accepted as a forming method for pipe-shaped structural parts for vehicles.
- the present invention has been achieved to solve the above-described problems in conventional hydraulic bulge forming using a hollow material, particularly aluminum tubular extrusion material.
- An object of the present invention is, therefore, to provide an aluminum extrusion material for hydraulic bulge forming, which can produce hydraulic bulge forming components possessing highly reliable and sufficient strength and rigidity against not only a static load, but also a twist load and dynamic load.
- Another object is to provide a hydraulic bulge forming method using the aluminum extrusion material for hydraulic bulge forming.
- the aluminum extrusion material for hydraulic bulge forming of claim 1 of the present invention is an hollow aluminum extrusion material used as a material for hydraulic bulge forming characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall has an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming.
- the aluminum extrusion material for hydraulic bulge forming of claim 1 is characterized by having a partition wall with a thickness of 0.5-1.5 times the thickness of the surrounding wall of the hollow aluminum extrusion material.
- the hydraulic bulge forming method of claim 3 of the present invention is characterized by feeding a fluid to the hollow part of the aluminum extrusion material for hydraulic bulge forming of claim 1 or claim 2, used as a raw material, applying pressure to the fluid to form the surrounding wall of the extrusion material in a desired shape, and, at the same time, flattening the partition wall.
- FIG. 1 is a cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 2 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 3 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 4 is yet another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 5 is still another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 6 is yet another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 7 is a cross-sectional view of the aluminum extrusion material for hydraulic bulge forming with a flat partition wall before and after forming.
- FIG. 8 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming with a flat partition wall before and after forming.
- the aluminum extrusion material for hydraulic bulge forming of the present invention is an hollow aluminum extrusion material used as a material for hydraulic bulge forming characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall is previously provided with an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming.
- FIGS. 1 - 6 Examples of the cross section of the hollow aluminum extrusion material for hydraulic bulge forming in the present invention are shown in FIGS. 1 - 6 .
- a material in the shape of a tube is shown as a hollow aluminum extrusion material (hereinafter referred to as “hollow material”) 1 .
- the hollow material 1 is provided with a partition wall 2 crossing a hollow space 4 .
- the partition wall 2 is formed integral with a surrounding wall 3 of the hollow material 1 .
- the partition wall 2 becomes flattened as shown by the broken line 2 A.
- the partition wall 2 is previously provided with an allowance in length, so that when the hollow material 1 becomes a prescribed shape by the hydraulic bulge forming, the partition wail 2 may become flattened.
- the length of the allowance is determined according to the degree of molding.
- the partition wall 2 There are no specific limitations to the shape of the partition wall 2 . Desired shapes for flattening the surplus length are bent shapes (FIGS. 1 - 2 ), curved shape (FIGS. 5 - 6 ), and cornice shapes (FIGS. 3 - 4 ). After the hydraulic bulge formation, the partition wall 2 becomes flattened and functions as a support for the surrounding wall 3 . As a result, the tube 1 A formed by hydraulic bulge formation becomes strong, capable of withstanding a static load from the outside, a dynamic load from the outside such as a collision, a twisting load, and the like.
- a tubular hollow material 1 with a round cross-section is formed into a tube with an oval cross-section, whereby the surrounding wall 3 is deformed as shown by the broken line 3 B and the partition wail 2 is flattened into a plane, with the length of the surrounding wall 3 remaining the same as the length of the surrounding wall 3 B.
- All embodiments shown in FIGS. 1 - 6 are hollow materials with a round cross-section. In the present invention, however, the cross-section of the hollow material need not be necessarily round. Hollow materials with a variety of cross-sections can be used as a raw material to produce formed products with a variety of cross-sections by the hydraulic bulge forming.
- the thickness of the partition wall 2 is preferably 0.5-1.5 times the thickness of the surrounding wall 3 of the hollow material. If less than 0.5 time, the partition wall is easily broken during expansion of the tube. Even if the partition wall can be expanded without becoming broken, it is difficult to form a sufficiently strong support for the surrounding wall 3 . If the thickness is more than 1.5 times, a required surplus length is available only with difficulty when forming the hollow material by extrusion.
- a hollow material used as a raw material is set on the female mold on a fixed board.
- the mold is then closed by placing the male mold onto the female mold by pushing using an embossing cylinder.
- a fluid such as oil or water is charged into the hollow space of the hollow material under low pressure.
- the axial indenting cylinder on the right and left sides of the hollow material is advanced to seal both ends.
- the hollow material is formed to become the shape of the mold, while adjusting the pressure applied to the hollow space and the forwarding pressure of the cylinder, to deform the surrounding wall to the shape as shown in FIGS. 1 - 6 , for example, and, at the same time, the partition wall is flattened, whereby a hydraulic bulge formed part with a prescribed shape can be obtained.
- Hollow aluminum extrusion materials 6063 alloy, thermal refining: O material
- an external diameter of 60.5 mm and thickness of 3 mm having cross-sectional shapes shown in FIGS. 1 - 5 , were prepared by port hole extrusion.
- Hollow aluminum extrusion materials 6063 alloy, thermal refining: O material
- an external diameter of 60.5 mm and thickness of 3 mm having a cross-sectional shape shown in FIGS. 7 - 8 , were prepared by port hole extrusion.
- An aluminum extrusion material for hydraulic bulge forming which can produce hydraulic bulge forming components possessing highly reliable and sufficient strength and rigidity capable of withstanding not only a static load, but also a twist load and dynamic load is provided by the present invention. Also provided is a hydraulic bulge forming method using the aluminum extrusion material for hydraulic bulge forming as a raw material.
- the aluminum extrusion material for hydraulic bulge forming is advantageous in terms of production costs and, therefore, is suitable as a material of aluminum structural components for vehicles to be processed by hydraulic bulge forming.
- High hardness components can be obtained by processing and curing using hydraulic bulge forming even in the case where a soft material with excellent formability is used as the aluminum extrusion material for hydraulic bulge forming.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Extrusion Of Metal (AREA)
Abstract
An aluminum extrusion material for hydraulic bulge forming, which can produce hydraulic bulge forming components possessing highly reliable and sufficient strength and rigidity capable of withstanding not only a static load, but also a twist load and dynamic load is provided. Also provided is a hydraulic bulge forming method using the aluminum extrusion material for hydraulic bulge forming as a raw material. The aluminum extrusion material is hollow and used as a material for hydraulic bulge forming. The material is characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall is provided with an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming.
Description
- 1. Field of the Invention
- The present invention relates to an aluminum extrusion material for hydraulic bulge forming, particularly to an aluminum extrusion material suitable for aluminum structural components for vehicles processed by hydraulic bulge forming, and to a hydraulic bulge forming method using the aluminum extrusion material. In the present invention, aluminum includes pure aluminum for industrial use and aluminum alloys.
- 2. Description of Background Art
- Hydraulic bulge forming is a technology for forming hollow materials in a prescribed shape. In hydraulic bulge forming, a hollow material such as a metal tube, a tubular material, or the like is set in a pair of metal molds, a fluid such as oil and water, for example, is fed to the hollow material under low pressure, and cylinders are inserted into the hollow material from both ends while discharging air from the hollow material to seal both ends. The pressure applied to the inside of the hollow material and the cylinder insertion pressure are controlled to form the hollow material into a desired shape. In some hydraulic bulge forming methods, hollow materials are formed using only the hydraulic pressure without providing the cylinder insertion pressure.
- Hydraulic bulge forming, which is also called hydro forming or hydrostatic bulge forming, can freely deform the cross-sectional configuration of a hollow material, enabling the hollow material to be formed into an integral object with a variety of shapes. Therefore, hydrostatic bulge forming can not only decrease production costs for various parts due to reduction of the number of the parts to be manufactured, but also increase reliability of the strength of the formed objects. For this reason, hydrostatic bulge forming is being widely accepted as a forming method for pipe-shaped structural parts for vehicles.
- Components obtained from a hollow material by deforming the circumference by applying hydraulic pressure to the inside of the hollow material or components formed by tube expansion, in the case where the hollow material is a tube, possess sufficient reliability in terms of strength to static loads. However, because the components are hollow, the strength to a twist load or a dynamic load caused by a collision, for example, is not sufficient. It is difficult to maintain cross-sectional shape when such a load is applied.
- The present invention has been achieved to solve the above-described problems in conventional hydraulic bulge forming using a hollow material, particularly aluminum tubular extrusion material. An object of the present invention is, therefore, to provide an aluminum extrusion material for hydraulic bulge forming, which can produce hydraulic bulge forming components possessing highly reliable and sufficient strength and rigidity against not only a static load, but also a twist load and dynamic load. Another object is to provide a hydraulic bulge forming method using the aluminum extrusion material for hydraulic bulge forming.
- To achieve the above object, the aluminum extrusion material for hydraulic bulge forming of
claim 1 of the present invention is an hollow aluminum extrusion material used as a material for hydraulic bulge forming characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall has an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming. - In the aluminum extrusion material for hydraulic bulge forming of
claim 1, the aluminum extrusion material for hydraulic bulge forming ofclaim 2 is characterized by having a partition wall with a thickness of 0.5-1.5 times the thickness of the surrounding wall of the hollow aluminum extrusion material. - The hydraulic bulge forming method of
claim 3 of the present invention is characterized by feeding a fluid to the hollow part of the aluminum extrusion material for hydraulic bulge forming ofclaim 1 orclaim 2, used as a raw material, applying pressure to the fluid to form the surrounding wall of the extrusion material in a desired shape, and, at the same time, flattening the partition wall. - FIG. 1 is a cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 2 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 3 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 4 is yet another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 5 is still another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 6 is yet another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming of the present invention before and after forming.
- FIG. 7 is a cross-sectional view of the aluminum extrusion material for hydraulic bulge forming with a flat partition wall before and after forming.
- FIG. 8 is another cross-sectional view of the aluminum extrusion material for hydraulic bulge forming with a flat partition wall before and after forming.
- The aluminum extrusion material for hydraulic bulge forming of the present invention is an hollow aluminum extrusion material used as a material for hydraulic bulge forming characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall is previously provided with an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming.
- Examples of the cross section of the hollow aluminum extrusion material for hydraulic bulge forming in the present invention are shown in FIGS.1-6. In FIGS. 1-6, a material in the shape of a tube is shown as a hollow aluminum extrusion material (hereinafter referred to as “hollow material”) 1. The
hollow material 1 is provided with apartition wall 2 crossing ahollow space 4. Thepartition wall 2 is formed integral with a surroundingwall 3 of thehollow material 1. - When the tube is expanded by hydraulic bulge formation, the surrounding
wall 3 of thehollow material 1 is deformed as shown by thebroken line 3A, whereby thepartition wall 2 becomes flattened as shown by thebroken line 2A. Specifically, thepartition wall 2 is previously provided with an allowance in length, so that when thehollow material 1 becomes a prescribed shape by the hydraulic bulge forming, thepartition wail 2 may become flattened. The length of the allowance is determined according to the degree of molding. - There are no specific limitations to the shape of the
partition wall 2. Desired shapes for flattening the surplus length are bent shapes (FIGS. 1-2), curved shape (FIGS. 5-6), and cornice shapes (FIGS. 3-4). After the hydraulic bulge formation, thepartition wall 2 becomes flattened and functions as a support for the surroundingwall 3. As a result, thetube 1A formed by hydraulic bulge formation becomes strong, capable of withstanding a static load from the outside, a dynamic load from the outside such as a collision, a twisting load, and the like. - In the embodiment shown in FIG. 6, a tubular
hollow material 1 with a round cross-section is formed into a tube with an oval cross-section, whereby the surroundingwall 3 is deformed as shown by thebroken line 3B and thepartition wail 2 is flattened into a plane, with the length of the surroundingwall 3 remaining the same as the length of the surroundingwall 3B. This is an example in which the length along the circumference does not change. All embodiments shown in FIGS. 1-6 are hollow materials with a round cross-section. In the present invention, however, the cross-section of the hollow material need not be necessarily round. Hollow materials with a variety of cross-sections can be used as a raw material to produce formed products with a variety of cross-sections by the hydraulic bulge forming. - The thickness of the
partition wall 2 is preferably 0.5-1.5 times the thickness of the surroundingwall 3 of the hollow material. If less than 0.5 time, the partition wall is easily broken during expansion of the tube. Even if the partition wall can be expanded without becoming broken, it is difficult to form a sufficiently strong support for the surroundingwall 3. If the thickness is more than 1.5 times, a required surplus length is available only with difficulty when forming the hollow material by extrusion. - Now, an embodiment for forming a material by hydraulic bulge forming using the above-described hollow material will be explained. A hollow material used as a raw material is set on the female mold on a fixed board. The mold is then closed by placing the male mold onto the female mold by pushing using an embossing cylinder. Then, a fluid such as oil or water is charged into the hollow space of the hollow material under low pressure. The axial indenting cylinder on the right and left sides of the hollow material is advanced to seal both ends.
- The hollow material is formed to become the shape of the mold, while adjusting the pressure applied to the hollow space and the forwarding pressure of the cylinder, to deform the surrounding wall to the shape as shown in FIGS.1-6, for example, and, at the same time, the partition wall is flattened, whereby a hydraulic bulge formed part with a prescribed shape can be obtained.
- The present invention is described below by examples and comparative examples to demonstrate the effects of the present invention. These examples illustrate only one of the embodiments of the present invention, which should not be construed as limiting the present invention.
- Hollow aluminum extrusion materials (6063 alloy, thermal refining: O material) with an external diameter of 60.5 mm and thickness of 3 mm, having cross-sectional shapes shown in FIGS.1-5, were prepared by port hole extrusion.
- Products were formed from the resulting hollow aluminum extrusion materials (test materials No. 1-7) by hydraulic bulge forming using a mold with a tube expansion rate of 29-30%, while adjusting the internal pressure and the cylinder axial indentation. The cross-sectional dimensions of the hydraulic bulge forming products after molding were measured. The results are shown in Table 1.
- As shown in Table 1, in the products formed from the test materials No. 1-7 by hydraulic bulge forming of the present invention, the surrounding walls were expanded without rupturing as shown by the
broken line 3A in FIGS. 1-5. Also, plane partition walls shown by thebroken line 2A in FIGS. 1-5 were formed.TABLE 1 Test material 1 2 3 4 5 6 7 Cross-section of the FIG. FIG. FIG. FIG. FIG. FIG. FIG. material 1 2 3 4 5 5 5 Before forming Circumference (mm) 190 190 190 190 190 190 190 External diameter 60.5 60.5 60.5 60.5 60.5 60.5 60.5 (mm) Partition wall thick- 3 3 3 3 4.5 3 1.5 ness (mm) Before forming Circumference (mm) 248 248 248 248 248 248 248 External diameter 78.7 78.7 78.4 78.6 78.5 78.6 78.6 (mm) Tube expansion (%) 30 30 30 30 30 30 30 - Hollow aluminum extrusion materials (6063 alloy, thermal refining: O material) with an external diameter of 60.5 mm and thickness of 3 mm, having a cross-sectional shape shown in FIGS.7-8, were prepared by port hole extrusion.
- Products were formed from the resulting hollow aluminum extrusion materials (test material Nos. 8-10) by hydraulic bulge forming using a mold with a tube expansion rate of 30%, while adjusting the internal pressure and the cylinder axial indentation. The cross-sectional dimensions of the hydraulic bulge forming products after molding were measured. The results are shown in Table 2.
- As shown in Table 2, in the hydraulic bulge forming using the test materials No. 8-10, the partition walls could not have been sufficiently deformed although they have expanded from 60.5 mm to 68.3 mm. The surrounding
walls 3, shown inbroken lines 3C in FIGS. 7 and 8, protruded in the circumferential direction between thepartition walls 2, resulting in a rupture before the circumference of the material came into contact with the internal wall of the mold.TABLE 2 Test material 8 9 10 Cross-section of the material Before forming Circumference (mm) 190 190 190 External diameter (mm) 60.5 60.5 60.5 Partition wall thickness (mm) 3 1.5 3 Before forming Circumference (mm) 243 235 225 External diameter (mm) 67.8 68.3 62.5 - An aluminum extrusion material for hydraulic bulge forming, which can produce hydraulic bulge forming components possessing highly reliable and sufficient strength and rigidity capable of withstanding not only a static load, but also a twist load and dynamic load is provided by the present invention. Also provided is a hydraulic bulge forming method using the aluminum extrusion material for hydraulic bulge forming as a raw material.
- Since the products are formed by extrusion processing, the aluminum extrusion material for hydraulic bulge forming is advantageous in terms of production costs and, therefore, is suitable as a material of aluminum structural components for vehicles to be processed by hydraulic bulge forming.
- High hardness components can be obtained by processing and curing using hydraulic bulge forming even in the case where a soft material with excellent formability is used as the aluminum extrusion material for hydraulic bulge forming.
Claims (3)
1. A hollow aluminum extrusion material for hydraulic bulge forming characterized by having a partition wall radially crossing the hollow part of the extrusion material, wherein the partition wall is provided with an allowance in length to become flat when the hollow part is formed into a prescribed shape by hydraulic bulge forming.
2. The hollow aluminum extrusion material for hydraulic bulge forming of claim 1 , wherein the partition wall has a thickness of 0.5-1.5 times the thickness of the peripheral wall of the hollow aluminum extrusion material.
3. The hydraulic bulge forming method characterized by feeding a fluid to the hollow part of the aluminum extrusion material for hydraulic bulge forming of claim 1 or claim 2 , used as a raw material, applying pressure to the fluid to form the peripheral wall of the extrusion material in a desired shape, and, at the same time, flattening the partition wall.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-268426 | 2001-09-05 | ||
JP2001268426A JP3676994B2 (en) | 2001-09-05 | 2001-09-05 | Hydraulic bulge forming method for aluminum hollow extrusions |
Publications (1)
Publication Number | Publication Date |
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US20030094026A1 true US20030094026A1 (en) | 2003-05-22 |
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ID=19094408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/233,480 Abandoned US20030094026A1 (en) | 2001-09-05 | 2002-09-04 | Aluminum extrusion material for hydraulic bulge forming and hydraulic bulge forming method using the extrusion material |
Country Status (3)
Country | Link |
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US (1) | US20030094026A1 (en) |
JP (1) | JP3676994B2 (en) |
CA (1) | CA2401059A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060066133A1 (en) * | 2004-09-29 | 2006-03-30 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
CN100337766C (en) * | 2004-09-29 | 2007-09-19 | 日产自动车株式会社 | Preform, hydroforming method, and hydroformed product |
US20080028614A1 (en) * | 2006-07-28 | 2008-02-07 | Ford Motor Company And To Vari-Form, Inc. | Double hydroformed tube with integral reinforcement |
WO2009064304A1 (en) * | 2007-11-15 | 2009-05-22 | Ford Motor Company | Double hydroformed tube with integral reinforcement |
BE1018266A3 (en) * | 2008-08-22 | 2010-08-03 | Atlas Copco Airpower Nv | METHOD FOR MANUFACTURING A ROTOR FOR A COMPRESSOR OR A ENGINE, A TUBE APPLIED THEREOF AND A ROTOR OBTAINED WITH SUCH METHOD |
WO2023274807A1 (en) * | 2021-06-29 | 2023-01-05 | Linde + Wiemann SE & Co. KG | Process for manufacturing a profiled part from a semi-finished tubular metal product |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2929408A (en) * | 1955-04-27 | 1960-03-22 | Acme Ind Inc | Fin construction |
US3000495A (en) * | 1958-04-11 | 1961-09-19 | Downing Alan Henry | Packaging method and means |
US3110754A (en) * | 1960-05-11 | 1963-11-12 | William W Witort | Conduit system and components therefor |
US3201861A (en) * | 1960-03-31 | 1965-08-24 | Fromson H A | Method of making a double-walled tube |
US3567134A (en) * | 1969-09-09 | 1971-03-02 | Rubbermaid Inc | Dual purpose hose |
US4120347A (en) * | 1976-10-04 | 1978-10-17 | Imre Molnar | Two-passage pipe, especially for air conditioning installations |
US5467826A (en) * | 1994-09-30 | 1995-11-21 | Marathon Oil Company | Oilfield tubing string integrally enclosing a fluid production or injection tube and a service line |
US5529195A (en) * | 1994-05-13 | 1996-06-25 | Pepsico., Inc. | Blow molded plastic container and method |
US5924456A (en) * | 1993-07-01 | 1999-07-20 | Hutchinson | Tubular section member, in particular for use as a fluid flow duct |
US5996639A (en) * | 1997-01-30 | 1999-12-07 | Action Technology | Multiple compartment corrugated hose |
US6283159B1 (en) * | 1998-09-01 | 2001-09-04 | Bestex Kyoei Co., Ltd. | Double-walled pipe structure |
US20020046830A1 (en) * | 2000-10-25 | 2002-04-25 | Holger Ulrich | Air conditioner with internal heat exchanger and heat exchanger tube therefor |
US6394142B1 (en) * | 2000-09-28 | 2002-05-28 | Vital Signs, Inc. | Multi-lumen hose with at least one substantially planar inner partition and methods of manufacturing the same |
US6564831B1 (en) * | 1999-03-23 | 2003-05-20 | Gaimont Universal Ltd. B.V.I. | Entruded multitubular device |
-
2001
- 2001-09-05 JP JP2001268426A patent/JP3676994B2/en not_active Expired - Fee Related
-
2002
- 2002-09-03 CA CA002401059A patent/CA2401059A1/en not_active Abandoned
- 2002-09-04 US US10/233,480 patent/US20030094026A1/en not_active Abandoned
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2929408A (en) * | 1955-04-27 | 1960-03-22 | Acme Ind Inc | Fin construction |
US3000495A (en) * | 1958-04-11 | 1961-09-19 | Downing Alan Henry | Packaging method and means |
US3201861A (en) * | 1960-03-31 | 1965-08-24 | Fromson H A | Method of making a double-walled tube |
US3110754A (en) * | 1960-05-11 | 1963-11-12 | William W Witort | Conduit system and components therefor |
US3567134A (en) * | 1969-09-09 | 1971-03-02 | Rubbermaid Inc | Dual purpose hose |
US4120347A (en) * | 1976-10-04 | 1978-10-17 | Imre Molnar | Two-passage pipe, especially for air conditioning installations |
US5924456A (en) * | 1993-07-01 | 1999-07-20 | Hutchinson | Tubular section member, in particular for use as a fluid flow duct |
US5529195A (en) * | 1994-05-13 | 1996-06-25 | Pepsico., Inc. | Blow molded plastic container and method |
US5467826A (en) * | 1994-09-30 | 1995-11-21 | Marathon Oil Company | Oilfield tubing string integrally enclosing a fluid production or injection tube and a service line |
US5996639A (en) * | 1997-01-30 | 1999-12-07 | Action Technology | Multiple compartment corrugated hose |
US6283159B1 (en) * | 1998-09-01 | 2001-09-04 | Bestex Kyoei Co., Ltd. | Double-walled pipe structure |
US6564831B1 (en) * | 1999-03-23 | 2003-05-20 | Gaimont Universal Ltd. B.V.I. | Entruded multitubular device |
US6394142B1 (en) * | 2000-09-28 | 2002-05-28 | Vital Signs, Inc. | Multi-lumen hose with at least one substantially planar inner partition and methods of manufacturing the same |
US20020046830A1 (en) * | 2000-10-25 | 2002-04-25 | Holger Ulrich | Air conditioner with internal heat exchanger and heat exchanger tube therefor |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060066133A1 (en) * | 2004-09-29 | 2006-03-30 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
EP1642657A1 (en) * | 2004-09-29 | 2006-04-05 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
CN100337766C (en) * | 2004-09-29 | 2007-09-19 | 日产自动车株式会社 | Preform, hydroforming method, and hydroformed product |
US7406849B2 (en) | 2004-09-29 | 2008-08-05 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
US7614271B2 (en) | 2004-09-29 | 2009-11-10 | Nissan Motor Co., Ltd. | Preform, hydroforming method, and hydroformed product |
US20080028614A1 (en) * | 2006-07-28 | 2008-02-07 | Ford Motor Company And To Vari-Form, Inc. | Double hydroformed tube with integral reinforcement |
US7975383B2 (en) * | 2006-07-28 | 2011-07-12 | Ford Global Technologies, Llc | Double hydroformed tube with integral reinforcement |
WO2009064304A1 (en) * | 2007-11-15 | 2009-05-22 | Ford Motor Company | Double hydroformed tube with integral reinforcement |
BE1018266A3 (en) * | 2008-08-22 | 2010-08-03 | Atlas Copco Airpower Nv | METHOD FOR MANUFACTURING A ROTOR FOR A COMPRESSOR OR A ENGINE, A TUBE APPLIED THEREOF AND A ROTOR OBTAINED WITH SUCH METHOD |
WO2023274807A1 (en) * | 2021-06-29 | 2023-01-05 | Linde + Wiemann SE & Co. KG | Process for manufacturing a profiled part from a semi-finished tubular metal product |
Also Published As
Publication number | Publication date |
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JP3676994B2 (en) | 2005-07-27 |
JP2003071527A (en) | 2003-03-11 |
CA2401059A1 (en) | 2003-03-05 |
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