DE102008027876A1 - Spatially curved sheet metal part i.e. side panel, manufacturing method for motor vehicle, involves providing waste region of drawn sheet metal part in end phase of drawing process with slot running to curved component sections - Google Patents
Spatially curved sheet metal part i.e. side panel, manufacturing method for motor vehicle, involves providing waste region of drawn sheet metal part in end phase of drawing process with slot running to curved component sections Download PDFInfo
- Publication number
- DE102008027876A1 DE102008027876A1 DE200810027876 DE102008027876A DE102008027876A1 DE 102008027876 A1 DE102008027876 A1 DE 102008027876A1 DE 200810027876 DE200810027876 DE 200810027876 DE 102008027876 A DE102008027876 A DE 102008027876A DE 102008027876 A1 DE102008027876 A1 DE 102008027876A1
- Authority
- DE
- Germany
- Prior art keywords
- slot
- sheet metal
- waste area
- metal part
- edge
- 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.)
- Ceased
Links
Classifications
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
-
- 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
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Blechziehteils, welches aus einem räumlich gekrümmten Bauteilabschnitt und einem an diesen angrenzenden Abfallbereich besteht, sowie auf ein Presswerkzeug zur Herstellung eines solchen Ziehteils, nach dem Oberbegriff des Patentanspruchs 1 bzw. 7.The The invention relates to a method for producing a sheet metal drawing part, which from a spatially curved Component section and adjacent to this waste area exists, as well as a pressing tool for producing such Drawing part, according to the preamble of claim 1 or 7.
Es ist bekannt, vor dem Verpressen eines derartigen Blechziehteils in den späteren Abfallbereich der noch unverformten Blechplatine Entlastungsschlitze oder -löcher einzustanzen, um so beim anschließenden Ziehvorgang im Presswerkzeug Rissbildungen vor allem in den stärker verformten Bauteilbereichen, also etwa an dem eingezogenen, mit erhöhtem Umformgrad verpressten Radlauf einer Kraftfahrzeug-Seitenwand, zu vermeiden.It is known before the compression of such a Blechziehteils in the later Waste area of the still undeformed sheet metal sheet relief slots or holes To dance, so as to the subsequent drawing process in the pressing tool cracks especially in the stronger deformed component areas, so about the retracted, with increased Forming degree pressed wheel arch of a motor vehicle side wall, too avoid.
Ein weiteres Problem bei der Herstellung derartiger Blechziehteile ergibt sich daraus, dass beim Ziehvorgang starke Spannungen entstehen, die nach dem Entformen des Bauteils aufgrund eines restspannungsbedingten Aufsprungeffekts dazu führen, dass die Querschnittskontur des fertiggestellten Bauteils von dem vorgegebenen Strakverlauf abweicht. Zur Kompensation einer solchen elastischen Rückverformung werden die Formflächen des Presswerkzeugs üblicherweise nachgearbeitet, was ein äußerst aufwändiger und dementsprechend kostenintensiver Vorgang ist, zumal diese Formflächen-Umbombierung häufig mehrfach wiederholt werden muss, bis die zum Ausgleich des Aufsprungeffekts erforderliche Formflächengeometrie erreicht ist.One further problem in the production of such Blechziehteile results from the fact that during the drawing process strong tensions arise, after removal of the component due to residual voltage Cause jump effect that the cross-sectional contour of the finished component of the predefined Strakverlauf deviates. To compensate for such elastic recovery become the form surfaces of the pressing tool usually reworked, which is an extremely costly and Accordingly, costly process is, especially as this form-surface Umbombierung often must be repeated several times until necessary to compensate for the Aufsprungeffekts Form surface geometry is reached.
Aufgabe der Erfindung ist es, ein Verfahren und ein entsprechendes Presswerkzeug der eingangs genannten Art zu schaffen, durch welches Restspannungen und dadurch verursachte Aufsprungeffekte im fertig geformten Bauteil auf baulich einfache Weise weitgehend unterbunden werden.task The invention is a method and a corresponding pressing tool of the type mentioned above, by which residual stresses and thereby caused Aufsprungeffekte in the finished molded component be largely prevented in a structurally simple way.
Diese Aufgabe wird erfindungsgemäß durch das im Patentanspruch 1 angegebene Verfahren bzw. das im Anspruch 7 gekennzeichnete Presswerkzeug gelöst.These The object is achieved by the in the claim 1 specified method or in claim 7 marked pressing tool solved.
Erfindungsgemäß wird das Blechziehteil im Abfallbereich nicht nur mit einem auf den räumlich gekrümmten Bauteilabschnitt zulaufenden Schlitz versehen, sondern entscheidend ist vor allem, dass der Schlitz nicht etwa in die unverformte Blechplatine, sondern erst in der Endphase des Ziehvorgangs in das Blechmaterial eingebracht wird, also kurz vor dem unteren Umkehrpunkt des Pressenstempels, wenn die Ausformung des Ziehteils bereits zum überwiegenden Teil abgeschlossen ist. Hierdurch wird sichergestellt, dass die Bauteilform durch den Einschnitt nicht mehr negativ beeinflusst wird, andrerseits aber umformbedingte Materialspannungen in der restlichen Umformphase infolge der nunmehr im Abfallbereich vorhandenen Schnittwirkung wirksam abgebaut werden. Das Ergebnis ist ein hochgenau und weitgehend ohne Aufsprungverhalten ausgeformtes Blechziehteil sowie ein Presswerkzeug, mit dem sich ohne umständliches Umbombieren der formgebenden Werkzeugflächen ein vorgegebener und auch nach dem endgültigen Zuschnitt formhaltiger Strakverlauf am Ziehteil erzielen lässt.According to the invention Blechziehteil in the waste area not only with a spatially curved component section tapered slot provided, but most importantly, that the slot is not in the undeformed metal sheet, but introduced into the sheet material only in the final phase of the drawing process is, ie just before the lower reversal point of the press stamp, if the formation of the drawn part already completed for the most part is. This ensures that the component shape through the Nick is no longer adversely affected, but on the other hand Form-related material stresses in the rest of the forming phase as a result of the cutting action now present in the waste sector effectively degraded. The result is a highly accurate and largely without pull-on behavior formed sheet metal drawing part and a pressing tool, with which without cumbersome Rebuilding the shaping tool surfaces a given and also after the final Cutting to achieve shape-rich Strakverlauf the drawn part.
Nach einer für eine aufsprungfreie Umformung besonders günstigen Ausgestaltung der Erfindung wird der Schlitz gemäß Anspruch 2 vorzugsweise bis randnah an den mehrfach gekrümmten Bauteilabschnitt geführt. Durch den Sicherheitsabstand zwischen Schlitzende und Bauteilabschnitt wird verhindert, dass sich ein vom Schlitzende in der letzten Umformphase möglicherweise ausgehender Riss vom Abfallbereich in den Bauteilabschnitt fortpflanzen kann. Eine weitere, nach den Ansprüchen 3 bzw. 8 bevorzugte Maßnahme zur Vermeidung einer störenden Rissbildung an den Schlitzenden besteht darin, dass der Schlitz geradlinig auf den Bauteilabschnitt zulaufend, zumindest in dem diesem zugewandten Endbereich jedoch abgerundet ausgebildet ist.To one for a jump-free forming particularly favorable embodiment of the invention is the slot according to claim 2 preferably led to close to the multi-curved component section. By the safety distance between the slot end and component section prevents one from the slot end in the last Umformphase possibly propagate outgoing crack from the waste area into the building section can. Another, preferred according to claims 3 and 8 measure the Avoiding a disturbing Cracking at the slot ends is that the slot straight on the component section tapering, at least in the However, this facing end portion is rounded.
Eine besonders wirksame Steuerung des Spannungsabbaus wird nach den Ansprüchen 4 bzw. 9 dadurch erreicht, dass der Schlitz allseitig, also auch auf Seiten des dem Bauteilabschnitt abgewandten Schlitzendes, vom Material des Abfallbereichs umschlossen ist.A Particularly effective control of the voltage reduction is according to claims 4 and 9, respectively achieved in that the slot on all sides, including on pages of the component section facing away from the slot end of the material the waste area is enclosed.
Mit dem erfindungsgemäßen Verfahren bzw. Presswerkzeug lassen sich selbst Blechziehteile, die aufgrund ihrer Querschnittsgeometrie ein ausgeprägtes Aufsprungpotenzial besitzen, weitgehend aufsprungfrei herstellen, so etwa solche, die, wie nach Anspruch 5 bevorzugt, in der an den Abfallbereich angrenzenden Randzone des Bauteilabschnitts einen örtlich erhöhten Umformgrad aufweisen. Ein in dieser Hinsicht besonders bevorzugter Anwendungsfall bezieht sich auf die Herstellung des Ziehteils als Kraftfahrzeug-Seitenwand mit einem mit örtlich erhöhtem Umformgrad verpressten, eingezogenen Radlauf und einem angrenzenden Abfallbereich, welcher in der erfindungsgemäßen Weise geschlitzt wird.With the method according to the invention or pressing tool can even sheet metal parts, due to their cross-sectional geometry have a pronounced Aufsprungpotenzial, produce largely jump-free, such as those that, as claimed 5 preferred in the adjacent to the waste area edge zone of the Component section one locally increased Have degree of deformation. A particularly preferred in this regard Use case refers to the production of the drawn part as a motor vehicle side wall with one with locally increased Forming degree pressed, retracted wheel arch and an adjacent Waste area which is slotted in the manner according to the invention.
Die Erfindung wird nunmehr anhand eines Ausführungsbeispiels in Verbindung mit den Zeichnungen näher erläutert. Es zeigen in stark schematisierter Darstellung:The Invention will now be based on an embodiment in conjunction closer with the drawings explained. It shows in a highly schematic representation:
Das
in
Um
dem zu begegnen, wird das Ziehteil
Um
zu verhindern, dass sich eine in der letzten Umformphase von den
Schlitzenden ausgehende Rissbildung in die Umformzone
Das
Presswerkzeug zur Herstellung des oben beschriebenen Blechziehteils
Im
Rahmen der Erfindung sind zahlreiche Abwandlungen möglich. So
kann an Stelle des Schlitzes
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810027876 DE102008027876A1 (en) | 2008-06-11 | 2008-06-11 | Spatially curved sheet metal part i.e. side panel, manufacturing method for motor vehicle, involves providing waste region of drawn sheet metal part in end phase of drawing process with slot running to curved component sections |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810027876 DE102008027876A1 (en) | 2008-06-11 | 2008-06-11 | Spatially curved sheet metal part i.e. side panel, manufacturing method for motor vehicle, involves providing waste region of drawn sheet metal part in end phase of drawing process with slot running to curved component sections |
Publications (1)
Publication Number | Publication Date |
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DE102008027876A1 true DE102008027876A1 (en) | 2009-12-17 |
Family
ID=41317717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE200810027876 Ceased DE102008027876A1 (en) | 2008-06-11 | 2008-06-11 | Spatially curved sheet metal part i.e. side panel, manufacturing method for motor vehicle, involves providing waste region of drawn sheet metal part in end phase of drawing process with slot running to curved component sections |
Country Status (1)
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DE (1) | DE102008027876A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102814430A (en) * | 2012-08-14 | 2012-12-12 | 奇瑞汽车股份有限公司 | Stamping method of top cover outer plate with skylight |
FR2988019A1 (en) * | 2012-03-13 | 2013-09-20 | Peugeot Citroen Automobiles Sa | Method for stamping complex-shaped part, involves cutting sheet to form burst part, where shape of burst is adapted for directing propagation of burst part in guided way in event of appearance of breakages at ends of burst part |
EP2762245A1 (en) * | 2013-02-01 | 2014-08-06 | Volkswagen AG | Method for forming a sheet metal material with local influence of the material flow by targeted splitting of the sheet metal material, as well as a splitting device and forming tool for carrying out the method |
FR3010333A1 (en) * | 2013-09-11 | 2015-03-13 | Peugeot Citroen Automobiles Sa | ADJUSTING FORMATION IN A BODY ELEMENT |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3709181A1 (en) * | 1987-03-20 | 1988-09-29 | Asea Ab | METHOD FOR THE PRODUCTION OF COMPLEX SHEET METAL PARTS AND TOOL FOR PRINT FORMING SUCH SHEET METAL PARTS |
JPH01278923A (en) * | 1988-04-28 | 1989-11-09 | Mazda Motor Corp | Press forming method |
DD289484A5 (en) * | 1989-11-23 | 1991-05-02 | Karosseriebaumeister Werner Hettwer,De | METHOD FOR PRODUCING PROFILED PULP STRIPS |
DE4035806A1 (en) * | 1990-11-10 | 1992-05-14 | Daimler Benz Ag | Removal of flaws in motor vehicle pressings - involves tool to press region of flaw against contoured support |
DE19801203A1 (en) * | 1998-01-15 | 1999-07-22 | Volkswagen Ag | Hole-making device for flowing drawn components, particularly sheets |
DE10103483A1 (en) * | 2001-01-26 | 2002-11-14 | Volkswagen Ag | Device for deep-drawing of sheet-metal blanks, comprises a punch-and-die tool with an insert which during a deep-drawing process is displaced from its rest position into a position flush with the punch contour |
DE102005019457A1 (en) * | 2005-04-25 | 2006-10-26 | Hayes Lemmerz Holding Gmbh | Method for production of wheel disc with imitated spokes, comprising use of holes for pressure relief |
-
2008
- 2008-06-11 DE DE200810027876 patent/DE102008027876A1/en not_active Ceased
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3709181A1 (en) * | 1987-03-20 | 1988-09-29 | Asea Ab | METHOD FOR THE PRODUCTION OF COMPLEX SHEET METAL PARTS AND TOOL FOR PRINT FORMING SUCH SHEET METAL PARTS |
JPH01278923A (en) * | 1988-04-28 | 1989-11-09 | Mazda Motor Corp | Press forming method |
DD289484A5 (en) * | 1989-11-23 | 1991-05-02 | Karosseriebaumeister Werner Hettwer,De | METHOD FOR PRODUCING PROFILED PULP STRIPS |
DE4035806A1 (en) * | 1990-11-10 | 1992-05-14 | Daimler Benz Ag | Removal of flaws in motor vehicle pressings - involves tool to press region of flaw against contoured support |
DE19801203A1 (en) * | 1998-01-15 | 1999-07-22 | Volkswagen Ag | Hole-making device for flowing drawn components, particularly sheets |
DE10103483A1 (en) * | 2001-01-26 | 2002-11-14 | Volkswagen Ag | Device for deep-drawing of sheet-metal blanks, comprises a punch-and-die tool with an insert which during a deep-drawing process is displaced from its rest position into a position flush with the punch contour |
DE102005019457A1 (en) * | 2005-04-25 | 2006-10-26 | Hayes Lemmerz Holding Gmbh | Method for production of wheel disc with imitated spokes, comprising use of holes for pressure relief |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2988019A1 (en) * | 2012-03-13 | 2013-09-20 | Peugeot Citroen Automobiles Sa | Method for stamping complex-shaped part, involves cutting sheet to form burst part, where shape of burst is adapted for directing propagation of burst part in guided way in event of appearance of breakages at ends of burst part |
CN102814430A (en) * | 2012-08-14 | 2012-12-12 | 奇瑞汽车股份有限公司 | Stamping method of top cover outer plate with skylight |
CN102814430B (en) * | 2012-08-14 | 2014-11-26 | 奇瑞汽车股份有限公司 | Stamping method of top cover outer plate with skylight |
EP2762245A1 (en) * | 2013-02-01 | 2014-08-06 | Volkswagen AG | Method for forming a sheet metal material with local influence of the material flow by targeted splitting of the sheet metal material, as well as a splitting device and forming tool for carrying out the method |
DE102013001723A1 (en) * | 2013-02-01 | 2014-08-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for forming a sheet material with local influencing of the material flow by targeted separation of the sheet material, as well as separation device and forming tool for performing the method |
DE102013001723B4 (en) * | 2013-02-01 | 2016-08-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for forming a sheet material with local influencing of the material flow by targeted separation of the sheet material, as well as separation device and forming tool for performing the method |
FR3010333A1 (en) * | 2013-09-11 | 2015-03-13 | Peugeot Citroen Automobiles Sa | ADJUSTING FORMATION IN A BODY ELEMENT |
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R012 | Request for examination validly filed |
Effective date: 20130528 |
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R002 | Refusal decision in examination/registration proceedings | ||
R003 | Refusal decision now final |