DE102010015834A1 - Tool for manufacturing thickenings of tubular or pot-shaped workpiece-slugs, has die plate and press mandrel defining female mold, where surface area of mandrel includes groove-shaped recesses and/or bars, which are axially aligned - Google Patents
Tool for manufacturing thickenings of tubular or pot-shaped workpiece-slugs, has die plate and press mandrel defining female mold, where surface area of mandrel includes groove-shaped recesses and/or bars, which are axially aligned Download PDFInfo
- Publication number
- DE102010015834A1 DE102010015834A1 DE201010015834 DE102010015834A DE102010015834A1 DE 102010015834 A1 DE102010015834 A1 DE 102010015834A1 DE 201010015834 DE201010015834 DE 201010015834 DE 102010015834 A DE102010015834 A DE 102010015834A DE 102010015834 A1 DE102010015834 A1 DE 102010015834A1
- Authority
- DE
- Germany
- Prior art keywords
- mandrel
- tool according
- recesses
- press
- webs
- 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.)
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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
- B21C37/16—Making tubes with varying diameter in longitudinal direction
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/04—Mandrels
-
- 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
- B21J5/08—Upsetting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
Zum Herstellen von topfförmigen Werkstücken sind zahlreiche Herstellungsverfahren bekannt. Aus Festigkeits- und Fertigungsgründen werden diese Werkstücke bevorzugt durch plastisches Umformen hergestellt, wie z. B. durch Kneten, durch Fließpressen oder durch Stauchen eines rohrförmigen Rohlings.For the production of cup-shaped workpieces numerous manufacturing methods are known. For strength and manufacturing reasons, these workpieces are preferably made by plastic forming, such. B. by kneading, by extrusion or by upsetting a tubular blank.
Eine bekannte Möglichkeit (
Eine weitere Möglichkeit, derartige Werkstücke herzustellen, besteht darin, ein rohrförmiges Werkstück durch Stauchen zu verformen (
Der Umformgrad dieser Werkstücke kann prinzipiell durch Erwärmen des Werkstücks erhöht werden, da die Formbarkeit des Werkstoffs mit zunehmender Temperatur – insbesondere im Bereich der Schmelztemperatur des Werkstoffs – drastisch zunimmt. Diese Möglichkeit ist aber durch die damit verbundenen Werkstückkosten und hohe Fertigungszeiten nur begrenzt anwendbar.The degree of deformation of these workpieces can be increased in principle by heating the workpiece, since the moldability of the material increases dramatically with increasing temperature, in particular in the region of the melting temperature of the material. However, this possibility is limited by the associated workpiece costs and high production times applicable.
Der Umformgrad der Werkstücke ist weiterhin dadurch begrenzt, dass insbesondere längere Rohre beim Stauchen zum Einknicken oder Beulen neigen. Diesem Problem wurde bislang dadurch Rechnung getragen, dass die Rohre in eine Matrize eingelegt wurden und der radiale Abstand zwischen der Matrize und dem Pressdorn möglichst niedrig gewählt wurde. Bei kompliziert gestalteten Konstruktionen sind dann aber mehrere Pressvorgänge erforderlich, bei denen die Umformung auf mehrere Fertigungsschritte mit jeweils angepassten Presswerkzeugen aufzuteilen war. Aus Kostengründen wäre es aber wünschenswert, die Anzahl der Pressvorgänge zu begrenzen.The degree of deformation of the workpieces is further limited by the fact that especially longer pipes tend to buckling or buckling during upsetting. This problem has so far been taken into account by the fact that the tubes were placed in a die and the radial distance between the die and the press mandrel was chosen as low as possible. In complicated designed constructions but then several pressing operations are required, in which the deformation was divided into several production steps, each with adapted pressing tools. For cost reasons, it would be desirable to limit the number of pressing operations.
Schließlich können hohe Umformgrade unerwünschte Falten und Verwertungen im Werkstoff hervorrufen, welche die Festigkeit und/oder das optische Erscheinungsbild des geformten Werkstücks negativ beeinflussen. Diese Erscheinungen können auf ein inhomogenes Fließen des Werkstoffs zurückgeführt werden und treten bevorzugt dort auf, wo lokal hohe Werkstoffvolumen durch Fließen transportiert werden müssen.Finally, high degrees of deformation can cause undesirable wrinkles and valorization in the material which adversely affect the strength and / or visual appearance of the formed workpiece. These phenomena can be attributed to an inhomogeneous flow of the material and occur preferentially where locally high volumes of material have to be transported by flow.
Die vorliegende Erfindung hat sich daher zum Ziel gesetzt, die beim Stand der Technik beobachteten Nachteile wenigstens zu mindern bzw. auch ganz zu vermeiden. Insbesondere sollen der Umformgrad beim Pressen von rohr- und/oder topfförmigen Werkstücken erhöht und der Fertigungsaufwand verringert werden.The present invention has therefore set itself the goal of at least alleviating or even completely avoiding the disadvantages observed in the prior art. In particular, the degree of deformation in the pressing of tubular and / or pot-shaped workpieces to be increased and the production cost to be reduced.
Das erfindungsgemäße Werkzeug sieht vor, dass in der Oberfläche eines Pressdorns erhabene Flächensegmente in Form von axialen Ausnehmungen ausgeformt werden, wobei die zwischen den Ausnehmungen verbleibenden Stege beim Stauchen des Werkstücks Teile der Rohrwände stützen, aber gleichzeitig ein Fließen des Werkstoffs in die Ausnehmungen hinein zulassen. Damit wird der Werkstoff beim Stauchvorgang nicht nur verdickt, sondern es werden zusätzlich axiale Rippen aus der Rohrwand ausgeformt, welche diese beim Stauchen abstützen und damit eine weitaus höhere Verdickung des Werkstücks ermöglichen, als dies bisher möglich war.The tool according to the invention provides that in the surface of a press mandrel raised surface segments are formed in the form of axial recesses, wherein the remaining between the recesses webs support during upsetting of the workpiece parts of the tube walls, but at the same time allow flow of the material into the recesses into it. Thus, the material is not only thickened during the upsetting process, but it also axial ribs are formed from the tube wall, which support these during upsetting and thus allow a much higher thickening of the workpiece, as was previously possible.
Ein weiterer Aspekt der Erfindung sieht vor, dass dem Werkstoff beim Ein- und/oder Ausfahren des Pressdorns eine radiale Press- bzw. Reibkraft aufgeprägt wird. Diese Maßnahme bewirkt nicht nur einen höheren Umformgrad, sondern eine zusätzliche Glättung der verformten Oberfläche. Dieser Effekt kann entweder durch eine Rotationsbewegung des Pressdorns oder durch gewendelte Ausprägungen in der Oberfläche des Pressdorns verwirklicht werden.A further aspect of the invention provides that the material is impressed upon insertion and / or extension of the press mandrel a radial pressing or friction force. This measure not only causes a higher degree of deformation, but an additional smoothing of the deformed surface. This effect can be realized either by a rotational movement of the press mandrel or by coiled shapes in the surface of the press mandrel.
Ferner wurde erkannt, dass die Form des Pressdorns die lokale Umformgeschwindigkeit im Werkstoff beeinflusst. Während eine ballige Form des Pressdorns zu einer hohen Umformgeschwindigkeit im Bereich des Dornendes führt, erzwingt ein Pressdorn in Form einer Pfeilspitze hohe Umformgrade am entgegengesetzten Ende des Pressdorns, an welchem auch dessen Ringschulter angeordnet ist.It was also recognized that the shape of the press mandrel influences the local forming speed in the material. While a crowned shape of the press mandrel leads to a high forming speed in the region of the mandrel end, a pressing mandrel in the form of an arrowhead forces high degrees of deformation on the opposite end of the press mandrel, on which also its annular shoulder is arranged.
Der Vollständigkeit halber wird noch darauf hingewiesen, dass die erfindungsgemäßen Umformungen nicht nur dadurch bewirkt werden können, dass ein Werkstück von einem Pressdorn in eine Matrize eingepresst wird, sondern prinzipiell auch durch Aufpressen einer Matrize auf ein Werkstück.For the sake of completeness, it should also be pointed out that the transformations according to the invention can be effected not only by pressing a workpiece into a die from a press mandrel, but in principle also by pressing a die onto a workpiece.
Die Erfindung soll nun anhand der folgenden Abbildungen näher veranschaulicht werden.The invention will now be illustrated by the following figures.
In
In den
In
In
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Matrizedie
- 22
- PressdornPress Dorn
- 33
- Ringschulterannular shoulder
- 44
- Dornendemandrel end
- 55
- Ende des Pressdorns an der Seite der RingschulterEnd of the press pin on the side of the ring shoulder
- 66
- Nuten im PressdornGrooves in the press mandrel
- 77
- Nutengrundgroove base
- 88th
- Anordnung der NutenArrangement of the grooves
- 99
- Stege am PressdornWebs on the press mandrel
- 1010
- Rohrpipe
- 1111
- Rohrrippepipe rib
- 1212
- RippenzwischenraumIntercostal space
- 1313
- erhabene Noppenraised pimples
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- CH 334020 A [0002] CH 334020 A [0002]
- DE 102004056147 B3 [0003] DE 102004056147 B3 [0003]
Claims (21)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010015834 DE102010015834A1 (en) | 2010-04-20 | 2010-04-20 | Tool for manufacturing thickenings of tubular or pot-shaped workpiece-slugs, has die plate and press mandrel defining female mold, where surface area of mandrel includes groove-shaped recesses and/or bars, which are axially aligned |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010015834 DE102010015834A1 (en) | 2010-04-20 | 2010-04-20 | Tool for manufacturing thickenings of tubular or pot-shaped workpiece-slugs, has die plate and press mandrel defining female mold, where surface area of mandrel includes groove-shaped recesses and/or bars, which are axially aligned |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010015834A1 true DE102010015834A1 (en) | 2011-10-20 |
Family
ID=44730726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE201010015834 Withdrawn DE102010015834A1 (en) | 2010-04-20 | 2010-04-20 | Tool for manufacturing thickenings of tubular or pot-shaped workpiece-slugs, has die plate and press mandrel defining female mold, where surface area of mandrel includes groove-shaped recesses and/or bars, which are axially aligned |
Country Status (1)
Country | Link |
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DE (1) | DE102010015834A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107405675A (en) * | 2015-03-10 | 2017-11-28 | 新日铁住金不锈钢株式会社 | Pipe thickens forming method and thickens pipe |
CN114011898A (en) * | 2021-11-03 | 2022-02-08 | 中北大学 | Method for preparing superfine crystal pipe by shearing, twisting, extruding and deforming |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH334020A (en) | 1954-02-03 | 1958-11-15 | Liebergeld Max | Process for the cold forming of cavities in bodies made of metal |
DE102004056147B3 (en) | 2004-11-20 | 2006-08-03 | Gkn Driveline International Gmbh | Reduction of tubes over a stepped mandrel for producing hollow shafts with undercut in one operation |
-
2010
- 2010-04-20 DE DE201010015834 patent/DE102010015834A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH334020A (en) | 1954-02-03 | 1958-11-15 | Liebergeld Max | Process for the cold forming of cavities in bodies made of metal |
DE102004056147B3 (en) | 2004-11-20 | 2006-08-03 | Gkn Driveline International Gmbh | Reduction of tubes over a stepped mandrel for producing hollow shafts with undercut in one operation |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107405675A (en) * | 2015-03-10 | 2017-11-28 | 新日铁住金不锈钢株式会社 | Pipe thickens forming method and thickens pipe |
CN107405675B (en) * | 2015-03-10 | 2019-08-06 | 新日铁住金不锈钢株式会社 | Pipe thickens forming method and thickens pipe |
US10603712B2 (en) | 2015-03-10 | 2020-03-31 | Nippon Steel & Sumkin Stainless Steel Corporation | Method of increasing thickness of tube and increased thickness tube |
CN114011898A (en) * | 2021-11-03 | 2022-02-08 | 中北大学 | Method for preparing superfine crystal pipe by shearing, twisting, extruding and deforming |
CN114011898B (en) * | 2021-11-03 | 2023-10-20 | 中北大学 | Method for preparing superfine crystal tube by shearing, torsion and extrusion deformation |
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R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B21C0025020000 Ipc: B21C0025040000 |
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R163 | Identified publications notified | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: B21C0025020000 Ipc: B21C0025040000 Effective date: 20111130 |
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R163 | Identified publications notified |
Effective date: 20111130 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20131101 |