WO1997009135A1 - Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden - Google Patents
Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden Download PDFInfo
- Publication number
- WO1997009135A1 WO1997009135A1 PCT/EP1996/003870 EP9603870W WO9709135A1 WO 1997009135 A1 WO1997009135 A1 WO 1997009135A1 EP 9603870 W EP9603870 W EP 9603870W WO 9709135 A1 WO9709135 A1 WO 9709135A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mandrel
- pressure
- tailstock
- semi
- rollers
- Prior art date
Links
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
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
- B21H7/187—Rolling helical or rectilinear grooves
Definitions
- the invention relates to a method and an apparatus for producing pressure-rolled tubes according to the preamble of claims 1 and 2 respectively.
- rotationally symmetrical parts e.g. pipes
- tubular construction parts e.g. the ends reinforced on the inside, the wall thicknesses reinforced on the inside, longitudinal ribs attached on the inside or combinations of these measures carried out. Since the outer dimensions of these tubular construction parts cannot be changed for constructional reasons, some of them are even standardized (e.g. for bicycles), these measures are generally best applied inside the tubular workpieces.
- the invention has for its object to provide a method according to the preamble of claim 1 and an associated device with which inexpensive and tolerance-accurate pipes can be produced with inner wall thickening at the ends.
- this object is achieved in that a first mandrel with a tailstock-side shoulder is used in a first operation, that the pressure rollers on the tailstock-side shoulder begin their forming work and work in the direction of the machine spindle, and then the semi-finished
- Tube is taken from the first mandrel, that in a second operation the semi-finished tube is clamped on the side with the already made wall thickening in a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with a lathe chuck (mandrel or similar) mounted in the spinning and rolling machine and a second mandrel fastened on the tailstock with
- Outside diameter which corresponds to the inside diameter of the wall thickening, is pushed into the semi-finished tube and that the pressure rollers then form the second wall thickening from the tailstock end towards the machine spindle side.
- a tube with inner wall thickening at the ends can be produced with simple means. All that is required in the press-rolling machine is a second press mandrel attached to the tailstock.
- the outside diameter of the first mandrel corresponds to the desired inside diameter of the unthickened central area of the finished pipe and the outside diameter of the shoulder corresponds to the desired inside diameter of the wall thickenings.
- the mandrel and / or the shoulder is provided with a profile on its outside.
- the profile can also be attached only to certain sections and advantageously consists of ribs and grooves. However, any other conceivable profile is possible.
- the mandrel and / or the shoulder is at least partially a polygon in cross section, such as a hexagon.
- the mandrel here naturally means the first or the second mandrel or both.
- this method and this device are particularly suitable for the production of structural parts for bicycles / motorcycles.
- Figure 1 shows schematically the first step in the manufacture of a tube with end wall thickening.
- Fig. 3 shows schematically the second operation
- Figure 4 shows the finished pipe with end wall thickening.
- Figure 5 shows an operation of a tube on a hexagonal mandrel and the finished tube after processing.
- Fig. 7 a mandrel with a profile of ribs and grooves.
- Fig. 1 shows schematically the first operation on a pressure rolling machine for producing a tube 3 with end wall thickening.
- the tube 3 is arranged on a first mandrel 1a and is plastically deformed by the force exerted on the pressure rollers 2.
- the outer diameter of the first pressure dome 1a corresponds to the desired inner diameter of the central region of the finished tube 3 that will later become thickened.
- a tailstock-side shoulder 4 is arranged on the first mandrel 1a, the outside diameter d- * of which corresponds to the desired inside diameter of the end-side wall thickenings of the finished tube 3.
- the pressure rollers 2 begin their forming work on the tailstock-side shoulder 4 and work in the direction of the machine spindle, not shown.
- the feed of the pressure rollers 2 is indicated by the reference number 8.
- FIG. 2 shows the semi-finished pipe 3a produced after this operation with the one-sided wall thickening 5 produced on one side.
- Reference number 9 indicates the end of the processing by the pressure rollers 2.
- the semi-finished pipe 3a After the semi-finished pipe 3a has been removed from the first mandrel 1 a, the semi-finished pipe 3a is in a second operation (see Fig. 3) on the side with the wall thickening 5 already made in a
- Press-rolling machine mounted chuck 6 (mandrel or similar) clamped.
- a mandrel 1 b attached to the tailstock is pushed into the semi-finished tube 3a.
- the second mandrel 1b has an outer diameter d £ which corresponds to the inner diameter of the wall thickening.
- the spinning rollers 2 then form the second wall thickening from the tailstock end towards the machine spindle.
- Reference number 12 indicates the end of processing by the pressure rollers 2.
- Fig. 4 shows the finished pipe 3 with the end wall thickening.
- Fig. 5a shows a mandrel 1 with a hexagonal cross section, a tube 3 being processed by spinning rollers 2. The finished tube 3 is shown in FIG. 5b.
- This mandrel 1 can be made in a wide variety of modifications. With spinning rollers 2 spinning rollers are always meant.
- FIG. 6a, b, c show three different tubes 3, each with a different inner contour.
- FIG. 6a shows a tube 3 with a hexagonal cross section, like FIG. 5b.
- 6b, c show a tube with fins 10 and grooves 11.
- the various tool arrangements described above can be used to produce cold-pressed parts with modifications inside these workpieces.
- the desired modifications inside these parts can only be produced with justifiable costs using the tool arrangements described.
- the devices described allow high repeatability. One part is the same as the other because the scatter in the values is minimal. Due to variations in the degree of deformation and, of course, the modifications inside the parts, the processes allow partially different resistance moments and strengths.
- the devices allow the production of conical parts, partly conical parts, possibly combined with wall thicknesses of different thicknesses, as well as with ribs or grooves on the inside in one operation. All of these advantages result in cost savings in the manufacture of tubular parts with the modifications described inside these workpieces.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59605725T DE59605725D1 (de) | 1995-09-07 | 1996-09-04 | Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden |
AT96931011T ATE195274T1 (de) | 1995-09-07 | 1996-09-04 | Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden |
EP96931011A EP0850114B1 (de) | 1995-09-07 | 1996-09-04 | Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden |
US09/029,222 US6038901A (en) | 1995-09-07 | 1996-09-04 | Method and device for producing press-rolled pipes with inner wall thickenings at the ends |
JP9510859A JPH11512028A (ja) | 1995-09-07 | 1996-09-04 | 端部の内側に肉厚部を有する圧延管を製作する方法及び装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19532951A DE19532951A1 (de) | 1995-09-07 | 1995-09-07 | Verfahren und Vorrichtung zur Herstellung von drückgewalzten Rohren mit inneren Wandverdickungen an den Enden |
DE19532951.1 | 1995-09-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997009135A1 true WO1997009135A1 (de) | 1997-03-13 |
Family
ID=7771434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003870 WO1997009135A1 (de) | 1995-09-07 | 1996-09-04 | Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden |
Country Status (10)
Country | Link |
---|---|
US (1) | US6038901A (de) |
EP (1) | EP0850114B1 (de) |
JP (1) | JPH11512028A (de) |
KR (1) | KR19990044435A (de) |
CN (1) | CN1195306A (de) |
AT (1) | ATE195274T1 (de) |
CA (1) | CA2228570A1 (de) |
CZ (1) | CZ48098A3 (de) |
DE (2) | DE19532951A1 (de) |
WO (1) | WO1997009135A1 (de) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61155339A (ja) * | 1984-12-28 | 1986-07-15 | Idemitsu Kosan Co Ltd | 置換基含有芳香族化合物の側鎖置換基にスチレン類を導入する方法 |
CA2163845A1 (en) * | 1994-12-29 | 1996-06-30 | James A. Duggan | Method of forming a one-piece steering shaft member |
DE10024647A1 (de) * | 2000-05-17 | 2001-12-06 | Sms Demag Ag | Verfahren zur Vorbereitung eines Rohranfanges für das Ziehen über einen Ziehdorn |
US6508002B1 (en) * | 2000-11-22 | 2003-01-21 | Douglas Chiang | Bicycle crank arm and method of making same |
JP3392401B2 (ja) | 2000-12-14 | 2003-03-31 | 東洋ゴム工業株式会社 | ゴムブッシュの外筒絞り加工を行う設備 |
JP4354133B2 (ja) * | 2001-08-10 | 2009-10-28 | カヤバ工業株式会社 | シリンダの加工方法 |
US6983632B2 (en) * | 2002-11-20 | 2006-01-10 | Hess Engineering, Inc. | Method and apparatus for spinning to a constant length |
US7530252B2 (en) * | 2003-07-17 | 2009-05-12 | Kabushiki Kaisha Hitachi Seisakusho | Method and apparatus for working tube |
US7922065B2 (en) | 2004-08-02 | 2011-04-12 | Ati Properties, Inc. | Corrosion resistant fluid conducting parts, methods of making corrosion resistant fluid conducting parts and equipment and parts replacement methods utilizing corrosion resistant fluid conducting parts |
DE102004039967B4 (de) | 2004-08-18 | 2006-10-12 | Gkn Driveline International Gmbh | Verfahren zum Rückwärtsfließpressen von Innenprofilen |
BRPI0503790B1 (pt) * | 2004-09-08 | 2019-04-30 | Dana Automotive Systems Group, Llc | Método de fabricação de membro estriado |
DE102004056147B3 (de) | 2004-11-20 | 2006-08-03 | Gkn Driveline International Gmbh | Reduzieren von Rohren über einem abgesetzten Dorn zur Herstellung von Hohlwellen mit Hinterschnitt in einer Operation |
US7647802B2 (en) * | 2006-08-30 | 2010-01-19 | Sunspring America, Inc. | One-piece flexible tube connector and method of making the same |
FR2910251B1 (fr) * | 2006-12-22 | 2009-03-06 | Rexam Dispensing Systems Sas | Tube plongeur metallique facette pour un systeme de distrution d'un fluide. |
KR100964882B1 (ko) * | 2008-01-31 | 2010-06-23 | 주식회사 코우 | 조향장치용 어퍼샤프트 가공방법 |
EP2127775B1 (de) * | 2008-05-26 | 2010-02-24 | Repkon Machine and Tool Industry & Trade Ltd. | Verfahren zur Fertigung von Werkstücken und Drückwalzmaschine dazu |
US8910409B1 (en) * | 2010-02-09 | 2014-12-16 | Ati Properties, Inc. | System and method of producing autofrettage in tubular components using a flowforming process |
US8869443B2 (en) | 2011-03-02 | 2014-10-28 | Ati Properties, Inc. | Composite gun barrel with outer sleeve made from shape memory alloy to dampen firing vibrations |
CN102915897B (zh) * | 2012-10-23 | 2015-11-25 | 安徽华东光电技术研究所 | 能保证管壳直线度的行波管管壳的制作方法及其制作工装 |
CN104797353A (zh) * | 2012-11-02 | 2015-07-22 | 施密特集团股份公司 | 用于生产不同壁厚的容器管的方法 |
US10118259B1 (en) | 2012-12-11 | 2018-11-06 | Ati Properties Llc | Corrosion resistant bimetallic tube manufactured by a two-step process |
EP2745951B1 (de) * | 2012-12-20 | 2014-11-19 | C.R.F. Società Consortile per Azioni | Verfahren zur Herstellung einer Nockenwelle in einem Verbrennungsmotor |
DE102014017426A1 (de) * | 2014-11-25 | 2016-05-25 | Wieland-Werke Ag | Verfahren zur Herstellung einer innenstruktuierten Gleitlagerbuchse |
CN104874638B (zh) * | 2015-06-19 | 2017-01-18 | 左铁军 | 等壁厚变径铜管的制造工艺 |
CN109433897A (zh) * | 2018-12-06 | 2019-03-08 | 内蒙古航天红岗机械有限公司 | 一种圆筒收口的强力旋压方法 |
CN109604407A (zh) * | 2018-12-10 | 2019-04-12 | 湖北三江航天江北机械工程有限公司 | 小直径多台阶变壁厚圆筒的精密旋压加工方法 |
IT201800021175A1 (it) * | 2018-12-27 | 2020-06-27 | Gilberto Eusebi | Procedimento di fabbricazione flow forming di bombole e bombola con esso ottenuta. |
CN110586825B (zh) * | 2019-08-26 | 2021-03-05 | 中冶陕压重工设备有限公司 | 一种台阶内孔筒类锻件的自由锻造法 |
CN110586730B (zh) * | 2019-09-17 | 2021-06-29 | 上海交通大学 | 带内壁纵向筋筒形件成品及其成形方法 |
CN111168339A (zh) * | 2020-01-15 | 2020-05-19 | 芜湖三联锻造股份有限公司 | 一种汽车传动轴及其旋压成型工艺 |
CN111256022A (zh) * | 2020-01-15 | 2020-06-09 | 芜湖三联锻造股份有限公司 | 一种复杂形状大型薄壁件及其制造工艺 |
DE102020103875A1 (de) | 2020-02-14 | 2021-08-19 | Winkelmann Powertrain Components GmbH & Co. KG. | Rotorhohlwelle |
CN113523198A (zh) * | 2021-06-30 | 2021-10-22 | 浙江凯华模具有限公司 | 一种模具内导热管回路结构 |
CN114789217A (zh) * | 2022-04-27 | 2022-07-26 | 广东轻量科技发展有限责任公司 | 一种汽车桥壳、汽车桥壳模具、及成形方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR468918A (fr) * | 1913-05-06 | 1914-07-20 | Emile Coulon | Procédé et appareil permettant de fabriquer au tour des tubes ou tuyaux renforcés à leurs extrémités |
JPS5921429A (ja) * | 1982-07-28 | 1984-02-03 | Nissan Motor Co Ltd | 内面に複数の段差を有する薄肉円筒の製造方法 |
DE4238815A1 (de) * | 1992-11-17 | 1994-05-19 | Richard Schlotter | Verfahren zum Herstellen einer Spule zum Aufwickeln von Garnen und entsprechend hergestellte Spule |
JPH06210385A (ja) * | 1993-01-19 | 1994-08-02 | Bridgestone Cycle Co | 自転車用フレームパイプの製造方法 |
JPH07164067A (ja) * | 1993-12-13 | 1995-06-27 | Sango Co Ltd | 偏肉厚パイプの製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51129328A (en) * | 1975-04-07 | 1976-11-10 | Tomio Yoshimura | Metal baseball bat and method of producing same |
US4454745A (en) * | 1980-07-16 | 1984-06-19 | Standard Tube Canada Limited | Process for cold-forming a tube having a thick-walled end portion |
DE4307775A1 (de) * | 1993-03-12 | 1994-09-15 | Dynamit Nobel Ag | Verfahren und Vorrichtung zur Herstellung von hochfesten Rohren |
-
1995
- 1995-09-07 DE DE19532951A patent/DE19532951A1/de not_active Withdrawn
-
1996
- 1996-09-04 KR KR1019980701682A patent/KR19990044435A/ko not_active Application Discontinuation
- 1996-09-04 CA CA002228570A patent/CA2228570A1/en not_active Abandoned
- 1996-09-04 JP JP9510859A patent/JPH11512028A/ja active Pending
- 1996-09-04 EP EP96931011A patent/EP0850114B1/de not_active Expired - Lifetime
- 1996-09-04 AT AT96931011T patent/ATE195274T1/de active
- 1996-09-04 DE DE59605725T patent/DE59605725D1/de not_active Expired - Fee Related
- 1996-09-04 CN CN96196793A patent/CN1195306A/zh active Pending
- 1996-09-04 CZ CZ98480A patent/CZ48098A3/cs unknown
- 1996-09-04 US US09/029,222 patent/US6038901A/en not_active Expired - Fee Related
- 1996-09-04 WO PCT/EP1996/003870 patent/WO1997009135A1/de not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR468918A (fr) * | 1913-05-06 | 1914-07-20 | Emile Coulon | Procédé et appareil permettant de fabriquer au tour des tubes ou tuyaux renforcés à leurs extrémités |
JPS5921429A (ja) * | 1982-07-28 | 1984-02-03 | Nissan Motor Co Ltd | 内面に複数の段差を有する薄肉円筒の製造方法 |
DE4238815A1 (de) * | 1992-11-17 | 1994-05-19 | Richard Schlotter | Verfahren zum Herstellen einer Spule zum Aufwickeln von Garnen und entsprechend hergestellte Spule |
JPH06210385A (ja) * | 1993-01-19 | 1994-08-02 | Bridgestone Cycle Co | 自転車用フレームパイプの製造方法 |
JPH07164067A (ja) * | 1993-12-13 | 1995-06-27 | Sango Co Ltd | 偏肉厚パイプの製造方法 |
Non-Patent Citations (4)
Title |
---|
BLANPAIN: "repoussage au tour et fluo-tournage", July 1967, LA PRATIQUE DES INDUSTRIES MÉCANIQUES, XP002019291 * |
PATENT ABSTRACTS OF JAPAN vol. 008, no. 112 (M - 298) 25 May 1984 (1984-05-25) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 572 (M - 1696) 2 November 1994 (1994-11-02) * |
PATENT ABSTRACTS OF JAPAN vol. 95, no. 006 * |
Also Published As
Publication number | Publication date |
---|---|
CN1195306A (zh) | 1998-10-07 |
EP0850114A1 (de) | 1998-07-01 |
US6038901A (en) | 2000-03-21 |
MX9801793A (es) | 1998-08-30 |
KR19990044435A (ko) | 1999-06-25 |
CA2228570A1 (en) | 1997-03-13 |
JPH11512028A (ja) | 1999-10-19 |
CZ48098A3 (cs) | 1999-05-12 |
DE59605725D1 (de) | 2000-09-14 |
EP0850114B1 (de) | 2000-08-09 |
DE19532951A1 (de) | 1997-03-13 |
ATE195274T1 (de) | 2000-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0850114B1 (de) | Verfahren und vorrichtung zur herstellung von drückgewalzten rohren mit inneren wandverdickungen an den enden | |
DE3742496C2 (de) | Verfahren und Vorrichtung zum Herstellen einer Endenverdickung an einem Stahlrohr | |
DE1804673C3 (de) | Verfahren zur Herstellung einer Kraftfahrzeug-Hohlachse | |
DE3223004A1 (de) | Lenkspindel fuer lenkvorrichtungen fuer kraftfahrzeuge sowie verfahren zur herstellung einer solchen lenkspindel | |
DE19614656A1 (de) | Verfahren zum Erhöhen der Wandungsstärke bei Hohlprofilen | |
DE10331061B4 (de) | Ringförmige Verbundwerkstücke und Kaltwalzverfahren zu ihrer Fertigung | |
DE102020101851B4 (de) | Federbeingabel sowie Verfahren zur Herstellung einer Federbeingabel | |
DE102007038713B4 (de) | Verfahren zur Herstellung von partiell verstärkten Hohlprofilen | |
EP1190784A2 (de) | Verfahren zur Herstellung eines Rohres mit partiell unterschiedlichen Wandstärken | |
EP0014474B1 (de) | Verfahren zur Herstellung eines Rohres | |
DE10248356A1 (de) | Verfahren und Vorrichtung zur Herstellung einer gewichtsoptimierten Luftreifenfelge | |
DE19532953A1 (de) | Verfahren und Vorrichtung zur Herstellung von drückgewalzten Rohren mit inneren Wandverdickungen | |
EP1169146B1 (de) | Verfahren und vorrichtung zur herstellung von gekrümmten strangpressprofilen | |
WO2008003305A1 (de) | Verfahren zur herstellung eines rotationssymmetrischen teils und danach hergestelltes teil | |
DE3021940C2 (de) | Verfahren und Anlage zum Herstellen von Rohren auf Rohrstoßbankanlagen | |
DE10044880A1 (de) | Verfahren zur Herstellung von speziell geformten Hohlkörpern aus Metall | |
DE19536817A1 (de) | Profilwalzwerkzeug zum profilierenden Kaltwalzen der Mantelfläche eines Werkstückes, insbesondere eines dünnwandigen Hohlteils | |
DE10211135B4 (de) | Verfahren und Vorrichtung zur Herstellung eines Formkörpers | |
DE2009321A1 (de) | Verfahren zum Herstellen von ein teiligen Hohlachsen | |
DE19532954A1 (de) | Abstreckdrückvorrichtung zur Herstellung von drückgewalzten Teilen unterschiedlicher Wanddicke | |
DE19818653A1 (de) | Verfahren zur Herstellung eines einteiligen Achskörpers sowie nach dem Verfahren hergestellter Achskörper | |
EP0941783A1 (de) | Verfahren zur Herstellung eines einteiligen Achskörpers sowie nach dem Verfahren hergestellter Achskörper | |
EP1714714B1 (de) | Verfahren zum Formen einer Nut | |
EP2205370B1 (de) | Verfahren und vorrichtung zur herstellung eines hohlkörpers und hohlkörper | |
DE3215389C2 (de) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 96196793.5 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA CN CZ JP KR MX US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996931011 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: PV1998-480 Country of ref document: CZ |
|
ENP | Entry into the national phase |
Ref document number: 2228570 Country of ref document: CA Ref document number: 2228570 Country of ref document: CA Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 1997 510859 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1019980701682 Country of ref document: KR Ref document number: PA/a/1998/001793 Country of ref document: MX |
|
WWP | Wipo information: published in national office |
Ref document number: 1996931011 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09029222 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: PV1998-480 Country of ref document: CZ |
|
WWP | Wipo information: published in national office |
Ref document number: 1019980701682 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996931011 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1019980701682 Country of ref document: KR |
|
WWR | Wipo information: refused in national office |
Ref document number: PV1998-480 Country of ref document: CZ |