DE10308849B4 - Process for the forming production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method - Google Patents
Process for the forming production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method Download PDFInfo
- Publication number
- DE10308849B4 DE10308849B4 DE10308849A DE10308849A DE10308849B4 DE 10308849 B4 DE10308849 B4 DE 10308849B4 DE 10308849 A DE10308849 A DE 10308849A DE 10308849 A DE10308849 A DE 10308849A DE 10308849 B4 DE10308849 B4 DE 10308849B4
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- Germany
- Prior art keywords
- semifinished product
- hollow body
- unit
- dimensionally accurate
- spinning
- 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.)
- Expired - Fee Related
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
-
- 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
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Verfahren zur umformenden Herstellung form- und maßgenauer, rotationssymmetrischer Hohlkörper (17) aus massivem stangenförmigen Halbzeug (1), wobei das Halbzeug (1) im Vorwärtshub durch Bohrungsdrücken unter Verwendung eines Drückdornes (7) und eines mindestens zwei Drückrollen (9) aufweisenden Rollenschlittens (11) zu einem Hohlkörper (17) umgeformt wird, dadurch gekennzeichnet, dass a) vor dem Umformvorgang die Fließspannung des Werkstoffes des Halbzeuges (1) durch gezielte Erwärmung herabgesetzt wird, wobei das Halbzeug (1) erwärmt und nachfolgend gekühlt wird, wodurch ein gezieltes Temperaturgefälle vom Kern des Halbzeuges (1) zu seiner Mantelfläche hin für die nachfolgende Formgebung eingestellt wird; b) im Umformbereich (16) der entstehende Hohlkörper (17) gekühlt wird, um die Festigkeit des Werkstoffes bei ausreichender Duktilität zu erhöhen, und c) darauffolgend der Hohlkörper (17) einer Wärmebehandlung unterzogen wird, wobei das Temperaturprofil gesteuert wird, um die Festigkeit und die Zähigkeit des Werkstoffes zu erhöhen und die Dauerfestigkeit zu verbessern.Process for the reshaping production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body (17) of solid rod-shaped semifinished product (1), wherein the semifinished product (1) in the forward stroke by Bohrungsdrücken using a spinning mandrel (7) and at least two spinning rollers (9) having roller carriage ( 11) to a hollow body (17), characterized in that a) before the forming process, the flow stress of the material of the semifinished product (1) is reduced by targeted heating, wherein the semifinished product (1) is heated and subsequently cooled, whereby a targeted Temperature gradient is set from the core of the semifinished product (1) to its lateral surface for subsequent shaping; b) in the forming area (16) the resulting hollow body (17) is cooled in order to increase the strength of the material with sufficient ductility, and c) subsequently the hollow body (17) is subjected to a heat treatment, wherein the temperature profile is controlled to the strength and to increase the toughness of the material and to improve fatigue strength.
Description
Die Erfindung betrifft ein Verfahren zur umformenden Herstellung form- und maßgenauer, rotationssymmetrischer Hohlkörper aus massivem stangenförmigen Halbzeug und eine zugehörige Vorrichtung, wobei das Halbzeug im Vorwärtshub durch Bohrungsdrücken unter Verwendung eines Drückdornes und eines, mindestens zwei Drückrollen aufweisenden, Rollenschlittens zu einem Hohlkörper umgeformt wird.The invention relates to a method for forming production dimensionally accurate and dimensionally rotationally symmetrical hollow body of solid rod-shaped semifinished product and an associated device, wherein the semifinished product in the forward stroke by Bohrungsdrücken using a spinning mandrel and a, having at least two pressure rollers, roller carriage is formed into a hollow body.
Darüber hinaus betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens gemäß dem Oberbegriff des Patentanspruchs 2.Moreover, the invention relates to an apparatus for carrying out the method according to the preamble of
Aus der
Bei Versuchen hat sich gezeigt, dass sich nicht alle Stähle zum Bohrungsdrücken eignen. Zum Beispiel kommt es bei den mikrolegierten ausscheidungshärtbaren ferritisch-perlitischen Stählen (AFP-Stahl) zum Prozessversagen. Grund dafür ist, dass sich die durch die Umformung eingebrachte Energie zum Teil in Wärmeenergie umwandelt. Durch die Temperaturerhöhung reduziert sich die Fließspannung. Der AFP-Stahl weist ein lokales Maximum des Umformwiderstandes bei ca. 300–400°C von 800–1000 MPa auf. Die Überbrückung dieses Sattels ist technologisch äußerst schwierig.Experiments have shown that not all steels are suitable for drilling pressure. For example, microalloyed precipitation-hardenable ferritic-pearlitic steels (AFP steel) suffer from process failure. The reason for this is that the energy introduced by the transformation is partly converted into heat energy. The temperature increase reduces the yield stress. The AFP steel has a local maximum of Umformwiderstandes at about 300-400 ° C of 800-1000 MPa. The bridging of this saddle is technologically extremely difficult.
Weiterhin sind folgende Lösungen bekannt:
In der
In the
Aus der
Letztlich ist aus der
Aufgabe der Erfindung ist es, ein Verfahren zur umformenden Herstellung form- und maßgenauer rotationssymmetrischer Hohlkörper aus massivem stangenförmigen Halbzeug und eine zugehörige Vorrichtung, wobei das Halbzeug im Vorwärtshub durch Bohrungsdrücken unter Verwendung eines Drückdornes und eines mindestens zwei Drückrollen aufweisenden Rollenschlittens zu einem Hohlkörper umgeformt wird sowie eine Vorrichtung zur Durchführung des Verfahrens, zu entwickeln, wodurch es möglich ist, den Umformwiderstand für den Umformvorgang zu senken.The object of the invention is to provide a method for transforming production dimensionally accurate and dimensionally rotationally symmetrical hollow body of solid rod-shaped semifinished product and an associated device, wherein the semifinished product is converted in the forward stroke by drilling pressures using a spinning mandrel and a roller carriage having at least two spinning rollers to a hollow body and a device for carrying out the method, to develop, whereby it is possible to lower the forming resistance for the forming process.
Die Aufgabe wird durch ein Verfahren mit den Merkmalen gemäß Patentanspruch 1 sowie durch eine Vorrichtung zur Durchführung des Verfahrens gemäß den Merkmalen des Patentanspruchs 2 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen 3 bis 6.The object is achieved by a method having the features according to patent claim 1 and by a device for carrying out the method according to the features of
Nachfolgend wird die Erfindung anhand eines Ausführungsbeispieles näher erläutert. Die dazugehörige Zeichnung zeigt eine Teilansicht einer Vorrichtung zum Herstellen form- und maßgenauer rotationssymmetrischer Hohlkörper.The invention will be explained in more detail with reference to an embodiment. The accompanying drawing shows a partial view of an apparatus for producing dimensionally accurate and dimensionally rotationally symmetrical hollow body.
Ein stangenförmiges Halbzeug
Durch die thermomechanische Behandlung während der umformenden Herstellung form- und maßgenauer, rotationssymmetrischer Hohlkörper
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- HalbzeugWorkpiece
- 22
- Wärmeeinheitthermal unit
- 33
- Kühleinheitcooling unit
- 44
- Kühleinheitcooling unit
- 55
- Erwärmungseinheitheating unit
- 66
- ringförmige Kühleinheitannular cooling unit
- 77
- Drückdornspinning mandrel
- 88th
- Schlittencarriage
- 99
- Drückrollenspinning rollers
- 1010
- Spannfutterchuck
- 1111
- Rollenschlittenroll carriage
- 1212
- Lagercamp
- 1313
- Lagerungstorage
- 1414
- Befestigungattachment
- 1515
- Befestigungattachment
- 1616
- Umformbereichforming region
- 1717
- Hohlkörperhollow body
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10308849A DE10308849B4 (en) | 2003-02-27 | 2003-02-27 | Process for the forming production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10308849A DE10308849B4 (en) | 2003-02-27 | 2003-02-27 | Process for the forming production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10308849A1 DE10308849A1 (en) | 2004-09-09 |
DE10308849B4 true DE10308849B4 (en) | 2013-10-31 |
Family
ID=32842035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10308849A Expired - Fee Related DE10308849B4 (en) | 2003-02-27 | 2003-02-27 | Process for the forming production dimensionally accurate and dimensionally accurate, rotationally symmetrical hollow body and apparatus for carrying out the method |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10308849B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019106214A1 (en) * | 2019-03-12 | 2020-09-17 | Federal-Mogul Valvetrain Gmbh | Process for the production of a hollow valve for internal combustion engines |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1795277A1 (en) * | 2005-12-07 | 2007-06-13 | Repkon Machine and Tool Industry & Trade Ltd. | Flow-turning machine |
DE102006031564A1 (en) | 2006-07-07 | 2008-01-10 | Gesenkschmiede Schneider Gmbh | Method for producing a rotationally symmetrical part, in particular shaft |
DE102008036226B4 (en) * | 2008-08-02 | 2018-12-27 | Volkswagen Ag | Method for producing a hollow shaft |
EP3106240A1 (en) | 2015-06-15 | 2016-12-21 | Fundacíon Tecnalia Research & Innovation | Rotary extrusion machine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2649019A1 (en) * | 1976-06-14 | 1977-12-15 | Nippon Steel Corp | METHOD OF MANUFACTURING SEAMLESS TUBES |
WO1993018870A1 (en) * | 1992-03-23 | 1993-09-30 | Mosey George N | Piercing mill for seamless tube manufacture |
DE4205675C2 (en) * | 1992-02-25 | 1995-04-20 | Schwager Aribert Prof Dr Ing H | Process for the reshaping production of shape and dimensionally accurate, rotationally symmetrical hollow bodies made of solid semi-finished products |
JP2000176511A (en) * | 1998-12-17 | 2000-06-27 | Nkk Corp | Method for piercing billet |
-
2003
- 2003-02-27 DE DE10308849A patent/DE10308849B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2649019A1 (en) * | 1976-06-14 | 1977-12-15 | Nippon Steel Corp | METHOD OF MANUFACTURING SEAMLESS TUBES |
DE4205675C2 (en) * | 1992-02-25 | 1995-04-20 | Schwager Aribert Prof Dr Ing H | Process for the reshaping production of shape and dimensionally accurate, rotationally symmetrical hollow bodies made of solid semi-finished products |
WO1993018870A1 (en) * | 1992-03-23 | 1993-09-30 | Mosey George N | Piercing mill for seamless tube manufacture |
JP2000176511A (en) * | 1998-12-17 | 2000-06-27 | Nkk Corp | Method for piercing billet |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019106214A1 (en) * | 2019-03-12 | 2020-09-17 | Federal-Mogul Valvetrain Gmbh | Process for the production of a hollow valve for internal combustion engines |
Also Published As
Publication number | Publication date |
---|---|
DE10308849A1 (en) | 2004-09-09 |
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8110 | Request for examination paragraph 44 | ||
R081 | Change of applicant/patentee |
Owner name: MEYER, LOTHAR W., DR. ING., DE Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 Owner name: MASEK, BOHUSLAV, DR. ING., CZ Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 Owner name: MAHN, UWE, DR. ING., DE Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 Owner name: LOTHAR W. MEYER, DE Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 Owner name: BOHUSLAV MASEK, CZ Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 Owner name: UWE MAHN, DE Free format text: FORMER OWNER: TECHNISCHE UNIVERSITAET CHEMNITZ, 09111 CHEMNITZ, DE Effective date: 20110728 |
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Representative=s name: FINDEISEN HUEBNER NEUMANN, DE Effective date: 20110728 Representative=s name: PATENTANWAELTE FINDEISEN & NEUMANN, DE Effective date: 20110728 Representative=s name: FINDEISEN HUEBNER NEUMANN, 09112 CHEMNITZ, DE |
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