US20040035176A1 - Method for manufacturing an aluminum tube - Google Patents
Method for manufacturing an aluminum tube Download PDFInfo
- Publication number
- US20040035176A1 US20040035176A1 US10/435,158 US43515803A US2004035176A1 US 20040035176 A1 US20040035176 A1 US 20040035176A1 US 43515803 A US43515803 A US 43515803A US 2004035176 A1 US2004035176 A1 US 2004035176A1
- Authority
- US
- United States
- Prior art keywords
- aluminum tube
- texture
- deformation
- manufacturing
- aluminum
- 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
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 14
- 239000000314 lubricant Substances 0.000 claims description 13
- 238000005096 rolling process Methods 0.000 claims description 10
- 230000003746 surface roughness Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000011265 semifinished product Substances 0.000 abstract description 7
- 238000007788 roughening Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- 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
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/083—Supply, or operations combined with supply, of strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
-
- 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
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/156—Making tubes with wall irregularities
- B21C37/158—Protrusions, e.g. dimples
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
- B21B2023/005—Roughening or texturig surfaces of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
Definitions
- the object derived and described above is solved from a procedural standpoint in that the outer surface of the aluminum tube is textured by means of temper rolls.
- Temper rolls with a high roll hardness whose surface has been roughened by one of the aforementioned procedures are particularly advantageous, since they have an especially high service life in the process of temper rolling.
- “electron beam texturing” (EBT) and “shot blast texturing” (SBT) procedures are also known as possible texturing procedures.
- an already textured strip stock can be used as the raw material in existing production facilities for manufacturing the semi-finished product.
- FIGURE The sole FIGURE on the drawing diagrammatically shows the texture of a section of the outer surface of an exemplary embodiment of an aluminum tube manufactured with a method according to the invention.
- FIGURE diagrammatically shows a section 1 of the outer surface of an aluminum tube according to the invention with a texture 2 comprised of numerous cup-like recesses 3 .
- the texture 2 was here engraved onto the outer surface of a straight bead welded aluminum tube by means of a temper roll textured with the LT procedure.
- the cup-like recesses 3 additionally have recessed lubricant pockets 4 , which stem from beads located on the roll surface.
- the beads are generated by briefly melting the roll material. In this case, the roll material melted in the crater area is deposited in a bead while hardening at the edge of the crater.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Metal Extraction Processes (AREA)
- Communication Cables (AREA)
Abstract
The invention relates to a method for manufacturing an aluminum tube, an aluminum tube for further processing in at least one subsequent deformation process, as well as the use of the aluminum tube. The object of providing a simple method for manufacturing an aluminum tube with elevated deformation potential is solved by texturing the outer surface of the aluminum tube using temper rolls. The application of a texture using temper rolls yields a sufficiently high roughness on the surface of the aluminum tube on the one hand, so that the strain can be increased in subsequent deformation processes. On the other hand, while the roughening of the surface can be integrated into existing manufacturing processes, e.g., for straight bead welded or extruded aluminum tubes a swift and easy manufacture of the semi-finished product is enabled.
Description
- The invention relates to a method for manufacturing an aluminum tube, an aluminum tube for further processing in at least one subsequent deformation process, as well as the use of the aluminum tube.
- The use of straight bead welded or extruded aluminum tubes as semi-finished products in subsequent deformation processes is known in the art, for example. In particular hydroforming makes it possible to use aluminum tubes for manufacturing components with a complex shape, e.g., for the chassis of a motor vehicle. The manufacturing process yields a very smooth outside surface for the straight bead welded and extruded aluminum tubes, with a roughness in the longitudinal direction of under Ra=0.1 μm. However, this results in an elevated friction on the deformation tool during hydroforming. For this reason, only low strains can be achieved during hydroforming. In addition, manufacturing defects can arise in critical deformation areas of the semi-finished product, so that a flawless production process cannot be ensured. If high strains are required, the aluminum tubes must either be coated or their surface roughened by surface blasting before machining. Both steps result in a considerable cost and time effort in the production process.
- Known in conventional sheet deformation processes, e.g., deep-drawing, is to apply a precisely defined texture to the strip surface by re-rolling the flat strip stock in order to maximise the strain without cracking, that means to maximise the deformation potential, while deep-drawing The increased strain results from the roughness recesses present in the texture of the strip stock, which serve as lubricant reserves during deformation, so that enough lubricant can be made available during critical deformation processes. To this end, the roughness recesses are engraved into the strip via temper rolls in a re-rolling just before the actual deformation process. Proceeding from the prior art described above, the object of this invention is to provide a simple method for manufacturing an aluminum tube with elevated deformation potential or a corresponding aluminum tube for further processing in at least one subsequent deformation process, and to propose a preferred application for the aluminum tube.
- According to a first teaching of the invention, the object derived and described above is solved from a procedural standpoint in that the outer surface of the aluminum tube is textured by means of temper rolls.
- Applying a texture with temper rolls yields a sufficient roughness on the surface of the aluminum tube on the one hand, so that the strain in subsequent deformation processes can be increased. On the other hand, surface roughening can be integrated into existing manufacturing processes, e.g., for extruded or straight bead welded aluminum tubes thereby enabling a swift and simple manufacture of the aluminum tube. Basically separate temper rolls or those integrated into the cold-rolling process and acting on the aluminum strip for straight bead welded aluminum tubes can be used as temper rolls, or all rolls used for roll forming, bending rolls or calibrating rolls.
- If temper rolls are used with a surface machined according to the “electrical discharge texturing” (EDT) procedure or the “lasertex” (LT) procedure, the surface can be roughened with a high level of reproducibility according to a first embodiment of this invention. In the EDT procedure, electrodes are moved radially toward the rotating roll surface, and oscillated in an axial direction. An eroding pulse generates particles in the dielectric between the roll and electrode to a dipole bridge, and current flows. A small area of the roll surface is melted, and a gas bubble forms in the A dielectric. The gas bubble implodes after the eroding pulse is deactivated, and the melted roll material is thrown out. The roughness can therefore be varied independently of the roll hardness using parameters like voltage, control times and distance of electrodes. Regardless of the roll hardness, the roll surface can also be textured using the LT procedure. In the LT procedure, a laser beam is focused on the roll, which melts a small area of the surface. A chopper wheel interrupts the laser beam, wherein the pressure of the plasma and an inert gas blow out the melt. In this case, the melt either builds up to form a bead around the crater edge, or accumulates on one side of the crater, solidifying there. The surface roughness can here be adjusted via laser power, axial advance of the roll, and radial speed of the roll and the chopper. Temper rolls with a high roll hardness whose surface has been roughened by one of the aforementioned procedures are particularly advantageous, since they have an especially high service life in the process of temper rolling. In addition, “electron beam texturing” (EBT) and “shot blast texturing” (SBT) procedures are also known as possible texturing procedures.
- If a straight bead welded aluminum tube is textured and the texture is engraved before deformation in a next embodiment of the method according to the invention, an already textured strip stock can be used as the raw material in existing production facilities for manufacturing the semi-finished product.
- In another embodiment of the method according to the invention, the texture of the outer surface of the straight bead welded aluminum tube is altered the least by ensuing rolling processes if the texture is alternatively or cumulatively engraved before calibration rolling or during calibration procedure.
- In addition, it is possible in another advantageous configuration of the procedure according to the invention to incorporate the texture after finishing the straight bead welded aluminum tube, or immediately prior to the next deformation step, by alternatively or cumulatively engraving the texture after the calibration rolling.
- According to the second teaching of the invention, the previously derived object for an aluminum tube for further processing in at least one ensuing deformation process is solved in that the outer surface of the aluminum tube has a texture. The surface roughness reduces the friction coefficients between the work piece and deformation tool in subsequent deformation processes. Due to the elevated deformation potential of the aluminum tube, the overall deformation behavior in subsequent deformation processes is improved, so that the process safety can be distinctly increased during deformation.
- In a next further developed embodiment of the aluminum tube according to the invention, a reliable deformation can be ensured in critical deformation areas in that the texture comprises roughness valleys and/or lubricant pockets for holding lubricants. In addition, the lubricant quantity used during deformation can be reduced, if necessary.
- If the texture has cup-like recesses, a next embodiment of the aluminum tube makes it possible to provide lubricant reservoirs on the surface of the aluminum tube in a particularly easy manner.
- Especially good deformation properties can be achieved in a subsequent hydroforming procedure if the outer surface has an elevated surface roughness relative to temper-rolled semi-finished sheet metal products in another advantageous embodiment of the aluminum tube according to the invention. In particular, this step makes it possible to take into account the increased surface pressure during hydroforming.
- According to the third instruction of the invention, the increased deformation potential of the aluminum tube and resultant high process safety during subsequent deformation process makes it particularly advantageous to use the aluminum tube according to the invention in a hydroforming procedure.
- There are numerous ways in which to configure and further develop the method according to the invention for manufacturing an aluminum tube according to the first teaching of the invention, the aluminum tube according to the second teaching of the invention, as well as the application of the aluminum tube according to the third teaching of the invention. To this end, reference is made to the claims following claims 1 and 5 on the one hand, and to the description of an exemplary embodiment in conjunction with the drawing.
- The sole FIGURE on the drawing diagrammatically shows the texture of a section of the outer surface of an exemplary embodiment of an aluminum tube manufactured with a method according to the invention.
- The FIGURE diagrammatically shows a section 1 of the outer surface of an aluminum tube according to the invention with a
texture 2 comprised of numerous cup-like recesses 3. Thetexture 2 was here engraved onto the outer surface of a straight bead welded aluminum tube by means of a temper roll textured with the LT procedure. The cup-like recesses 3 additionally have recessed lubricant pockets 4, which stem from beads located on the roll surface. In the LT procedure, the beads are generated by briefly melting the roll material. In this case, the roll material melted in the crater area is deposited in a bead while hardening at the edge of the crater. - The lubricant applied to the surface of the semi-finished product before an ensuing deformation step can be stored in the correspondingly introduced cup-
like recesses 3 and lubricant pockets 4 on the surface of the semi-finished product. If the lubricant pockets 4 and/or cup-like recesses 2 are stretched or compressed in a deformation process, the lubricant contained therein can exit in the gap between the semi-finished product and deformation tool wall, and its friction coefficients can be kept low even given intense deformation. This clearly facilitates in particular the deformation of critical areas with elevated strain, so that the potential for dimensionally changing the aluminum is improved, and production safety can be significantly enhanced, in particular during hydroforming,
Claims (10)
1. A method for manufacturing an aluminum tube, characterized in that the outer surface of the aluminum tube is textured by means of the temper rolls.
2. The method according to claim 1 , characterized in that temper rolls are used with a surface machined according to the EDT or lasertex procedure.
3. The method according to claim 1 or 2, characterized in that a straight bead welded aluminum tube is textured, and the texture is engraved prior to form rolling.
4. The method according to claim 3 , characterized in that the texture is engraved alternatively or cumulatively before calibration rolling or during calibration rolling.
5. The method according to claim 3 or 4, characterized in that the texture is engraved alternatively or cumulatively after calibration rolling.
6. An aluminum tube for further processing in at least one ensuing deformation procedure, in particular manufactured using a method according to one of claims 1 to 5 , characterized in that the outer surface (1) of the aluminum tube has a texture (2).
7. The aluminum tube according to claim 6 , characterized in that the texture (2) has roughness valleys and/or lubricant pockets (4) for storing lubricants.
8. The aluminum tube according to claim 6 or 7, characterized in that the texture (2) has cup-like recesses (3).
9. The aluminum tube according to one of claims 6 to 8 , characterized in that the outer surface has an elevated surface roughness relative to temper rolled semi-finished sheet metal products.
10. Use of an aluminum tube according to one of claims 6 to 9 in a hydroforming procedure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10221515A DE10221515C1 (en) | 2002-05-14 | 2002-05-14 | Aluminium tube manufacturing method using dressing rollers for texturing outer surface of aluminium tube |
| DE10221515.4-14 | 2002-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20040035176A1 true US20040035176A1 (en) | 2004-02-26 |
Family
ID=29225165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/435,158 Abandoned US20040035176A1 (en) | 2002-05-14 | 2003-05-09 | Method for manufacturing an aluminum tube |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20040035176A1 (en) |
| EP (1) | EP1362648B1 (en) |
| AT (1) | ATE301009T1 (en) |
| DE (2) | DE10221515C1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140027100A1 (en) * | 2011-04-03 | 2014-01-30 | Nec Corporation | Piping structure of cooling device, method for making the same, and method for connecting pipes |
| US20160059283A1 (en) * | 2013-04-26 | 2016-03-03 | Sms Group Gmbh | Method and rolling stand for cold rolling rolled stock |
| US20160184532A1 (en) * | 2013-09-11 | 2016-06-30 | Terumo Kabushiki Kaisha | Medical hollow needle assembly and method of manufacturing hollow needle |
| US10252305B2 (en) | 2012-09-07 | 2019-04-09 | Daetwyler Graphics Ag | Flat product made of a metal material and roll and method for producing such flat products |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011110458A1 (en) * | 2011-08-05 | 2013-02-07 | Witzenmann Gmbh | Surface conduction element and method of making and using such a conduction element |
| EP3067149A1 (en) | 2015-03-13 | 2016-09-14 | Wartmann Technologie AG | Internally pressurised tube for gas insulated switching devices or transmission lines and method for their production |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332270A (en) * | 1963-11-04 | 1967-07-25 | Mannesmann Meer Ag | Roll change means preferably for welding roll mills for straight bead welded tubes |
| US3728782A (en) * | 1970-10-08 | 1973-04-24 | Kabel Metallwerke Ghh | Process for the production of straight-bead welded pipe |
| US3861462A (en) * | 1971-12-30 | 1975-01-21 | Olin Corp | Heat exchange tube |
| US3956915A (en) * | 1975-03-25 | 1976-05-18 | National Steel Corporation | Drawing and ironing container stock and manufacturing methods |
| US4087898A (en) * | 1975-07-24 | 1978-05-09 | Southwire Company | Metallic rod product, and method for producing same |
| US4628179A (en) * | 1983-03-11 | 1986-12-09 | Centre de Recherches Metalurgiques-Centrum Voor Research in de Metallurgie | Method of improving the state of the surface of a roll |
| US4634475A (en) * | 1980-03-06 | 1987-01-06 | Austria Metall Aktiengesellschaft | Deep-drawable aluminum sheet or strip and method of making same |
| US20030136167A1 (en) * | 2001-12-05 | 2003-07-24 | Rene-Pierre Pont | Process for improving the adhesion of a lubricant to the surface of an aluminum strip |
| US20040112104A1 (en) * | 2001-03-12 | 2004-06-17 | Scamans Geoffrey M. | Method and apparatus for texturing a metal sheet or strip |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3713909A1 (en) * | 1987-04-25 | 1988-11-10 | Vaw Ver Aluminium Werke Ag | DEEP-DRAWABLE SHEET OR STRIP MADE OF ALUMINUM OR ALUMINUM ALLOYS AND METHOD FOR THE PRODUCTION THEREOF |
| DE4220625C1 (en) * | 1992-06-24 | 1993-06-03 | Gkn Automotive Ag, 5200 Siegburg, De | Rods, pipes, shaped pieces etc. - have surface depressions applied, esp. by ball blasting which are filled with lubricant prior to cold-drawing |
-
2002
- 2002-05-14 DE DE10221515A patent/DE10221515C1/en not_active Expired - Fee Related
-
2003
- 2003-05-02 EP EP03010028A patent/EP1362648B1/en not_active Expired - Lifetime
- 2003-05-02 AT AT03010028T patent/ATE301009T1/en not_active IP Right Cessation
- 2003-05-02 DE DE50300892T patent/DE50300892D1/en not_active Expired - Lifetime
- 2003-05-09 US US10/435,158 patent/US20040035176A1/en not_active Abandoned
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3332270A (en) * | 1963-11-04 | 1967-07-25 | Mannesmann Meer Ag | Roll change means preferably for welding roll mills for straight bead welded tubes |
| US3728782A (en) * | 1970-10-08 | 1973-04-24 | Kabel Metallwerke Ghh | Process for the production of straight-bead welded pipe |
| US3861462A (en) * | 1971-12-30 | 1975-01-21 | Olin Corp | Heat exchange tube |
| US3956915A (en) * | 1975-03-25 | 1976-05-18 | National Steel Corporation | Drawing and ironing container stock and manufacturing methods |
| US4017367A (en) * | 1975-03-25 | 1977-04-12 | National Steel Corporation | Ironing container stock manufacturing method |
| US4087898A (en) * | 1975-07-24 | 1978-05-09 | Southwire Company | Metallic rod product, and method for producing same |
| US4634475A (en) * | 1980-03-06 | 1987-01-06 | Austria Metall Aktiengesellschaft | Deep-drawable aluminum sheet or strip and method of making same |
| US4628179A (en) * | 1983-03-11 | 1986-12-09 | Centre de Recherches Metalurgiques-Centrum Voor Research in de Metallurgie | Method of improving the state of the surface of a roll |
| US20040112104A1 (en) * | 2001-03-12 | 2004-06-17 | Scamans Geoffrey M. | Method and apparatus for texturing a metal sheet or strip |
| US20030136167A1 (en) * | 2001-12-05 | 2003-07-24 | Rene-Pierre Pont | Process for improving the adhesion of a lubricant to the surface of an aluminum strip |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140027100A1 (en) * | 2011-04-03 | 2014-01-30 | Nec Corporation | Piping structure of cooling device, method for making the same, and method for connecting pipes |
| US10252305B2 (en) | 2012-09-07 | 2019-04-09 | Daetwyler Graphics Ag | Flat product made of a metal material and roll and method for producing such flat products |
| US20160059283A1 (en) * | 2013-04-26 | 2016-03-03 | Sms Group Gmbh | Method and rolling stand for cold rolling rolled stock |
| US20160184532A1 (en) * | 2013-09-11 | 2016-06-30 | Terumo Kabushiki Kaisha | Medical hollow needle assembly and method of manufacturing hollow needle |
| US10434265B2 (en) * | 2013-09-11 | 2019-10-08 | Terumo Kabushiki Kaisha | Medical hollow needle assembly and method of manufacturing hollow needle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1362648A1 (en) | 2003-11-19 |
| DE10221515C1 (en) | 2003-11-13 |
| DE50300892D1 (en) | 2005-09-08 |
| EP1362648B1 (en) | 2005-08-03 |
| ATE301009T1 (en) | 2005-08-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: HYDRO ALUMINIUM DEUTSCHLAND GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAASE, JANS;OPITZ, MICHAEL;REMPE, WOLFGANG;AND OTHERS;REEL/FRAME:014610/0873;SIGNING DATES FROM 20030725 TO 20031003 |
|
| AS | Assignment |
Owner name: HYDRO ALUMINIUM DEUTSCHLAND GMBH, GERMANY Free format text: RE-RECORD TO CORRECT THE NAME OF THE FIRST ASSIGNOR, PREVIOUSLY RECORDED ON REEL 014610 FRAME 0873, ASSIGNOR CONFIRMS THE ASSIGNMENT OF THE ENTIRE INTEREST.;ASSIGNORS:HAASE, JENS;OPITZ, MICHAEL;REMPE, WOLFGANG;AND OTHERS;REEL/FRAME:014825/0950;SIGNING DATES FROM 20030725 TO 20031003 |
|
| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |