EP2292344A1 - Method and device for reforming sheet metal - Google Patents
Method and device for reforming sheet metal Download PDFInfo
- Publication number
- EP2292344A1 EP2292344A1 EP20100006791 EP10006791A EP2292344A1 EP 2292344 A1 EP2292344 A1 EP 2292344A1 EP 20100006791 EP20100006791 EP 20100006791 EP 10006791 A EP10006791 A EP 10006791A EP 2292344 A1 EP2292344 A1 EP 2292344A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- sheets
- forming
- hold
- abkantstempel
- 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.)
- Withdrawn
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
Definitions
- the invention relates to a method for Nachumformung of sheets, especially magnesium and / or aluminum-containing lightweight sheets for motor vehicles in the region of their edges and an apparatus for performing the method.
- Magnesium is an extremely lightweight material, which has so far been rarely used, mainly because of its relatively low elongation at break in the automotive industry. By heating the board or the drawing part, however, the forming properties can be significantly improved.
- a device for forming metal sheets, in particular magnesium sheets wherein the metal sheet in the forming space between the upper and lower tool should be at least partially heated.
- hot air is passed through provided in the upper tool and / or lower tool flow channels in the forming space. Proposed is also an indirect heating, wherein the heat transfer via the press tool, ie upper tool and / or lower tool, which in turn are heated, takes place.
- the hot forming should be carried out at temperatures between 90 ° and 350 ° C, preferably at a temperature of about 280 ° C.
- the invention is therefore based on the object to provide a method and apparatus for reshaping of sheets, especially magnesium and / or aluminum-containing lightweight sheets, in which the mentioned problems do not occur.
- the sheet is heated before the Nachumformung, ideally in the tool, preferably at least one of the tools, ie the tray surface, the hold and the Abkantstempel directly and / or indirectly heated and only after reaching the required forming temperature of the Abkantstquel with the reshaped edge region of the Connected sheet so that then the actual Abkantschieber can form the edge area around the outer contour present on the Abkantstquel.
- the structure of a resource for reshaping a peripheral flange is shown with undercut for a sheet 1 made of magnesium.
- the operating means has a heatable, designed as a controllable lifting element storage surface 2 for the sheet 1, wherein the nachformende sheet 1 is brought in a raised position over as large a storage surface 2 to the appropriate forming temperature. Since the temperature is applied best from both sides and in the clamped state, a likewise heatable, preferably full-surface resting hold-down 3 is provided as an abutment.
- the sheet 1 is freely deposited on the, after heat expansion suitable, preferably also heated Abkantstkov 4, 5. In Fig. 2 this is a rigid punch 4, while in the Fig.
- displaceable Abkantstempel 5 which is also referred to as a filling slide, is shown.
- These also heated filling slide are used in particular for forming undercuts, which are formed by the present at the upper left end of the filling slide projection.
- the Abkantschieber 6 are moved back to their original position and the storage surface 2 are moved in the direction of the double arrow P1 upwards, whereby the spring-loaded hold-down 3 is moved against the spring 8 in the direction of the double arrow P2 upwards and at the end so far away is that the sheet can be removed (see. Fig. 6 ).
- the shelf 2 is controlled by means of the spring 7 or a similar device in the direction of the double arrow P1 moves.
- Fig. 2 and 3 is additionally shown in dashed line the position of the reshaped area 9b of the sheet 1, if it is not heated.
- the region to be reshaped assumes the position 9a in the hot state, so that the press-on dies 4 and 5 can then be brought exactly into the reshaping position.
- the outer edge of the sheet 1 is designated 10, while the non-resting on the support surface 2 of the sheet part 1 forms the outer region 11.
- the special feature of the proposal according to the invention is that only after heating the sheet 1 to forming temperature and thus only after reaching the final extent of the rigid Abkantstempel 4 or formed as a filling slide Abkantstkov 5 is brought into the exact position.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Nachumformung von Blechen, insbesondere Magnesium und/oder Aluminium enthaltenden Leichtblechen für Kraftfahrzeuge im Bereich ihrer Ränder und eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for Nachumformung of sheets, especially magnesium and / or aluminum-containing lightweight sheets for motor vehicles in the region of their edges and an apparatus for performing the method.
Magnesium ist ein extrem leichter Werkstoff, der bisher hauptsächlich wegen seiner relativ geringen Bruchdehnung im Automobilbau eher selten eingesetzt wird. Durch Erwärmen der Platine bzw. des Ziehteils können die Umformeigenschaften jedoch erheblich verbessert werden.Magnesium is an extremely lightweight material, which has so far been rarely used, mainly because of its relatively low elongation at break in the automotive industry. By heating the board or the drawing part, however, the forming properties can be significantly improved.
Aus der
Bei der Fertigung von größeren Kraftfahrzeugbauteilen, z. B. bei der Fertigung einer Dachaußenhaut aus Magnesium ist es häufig erforderlich nach einem ersten Umformvorgang durch eine Nachumformung die Randbereiche der Bleche weiter umzuformen. Hierbei gilt es vor allem, den relativ hohen Wärmeausdehnungskoeffizienten von Magnesium zu berücksichtigen. Die Abmessungen des nachzuformenden Bauteiles können sich dabei je nach Bauteilgröße beim Aufheizen auf die erforderliche Umformtemperatur erheblich ändern. Für die Werkzeugfunktion ergeben sich dabei Besonderheiten, die bei der Auslegung eines Nachform-Betriebsmittels für Magnesiumbleche berücksichtigt werden müssen. Da das nachzuformende Bauteil im kalten Zustand noch nicht auf den größeren, die Wärmeausdehnung berücksichtigenden Nachformstempel passt und auch nicht hinreichend umformbar ist, müssen hierzu besondere Maßnahmen ergriffen werden.In the manufacture of larger vehicle components, eg. As in the production of a roof skin made of magnesium, it is often necessary after a first forming process by reshaping to further reshape the edge regions of the sheets. Here, it is important to take into account the relatively high thermal expansion coefficient of magnesium. The dimensions of the component to be reshaped can change considerably depending on the component size during heating to the required forming temperature. For the tool function, there are special features that take into account when designing a postforming equipment for magnesium sheets Need to become. Since the component to be formed does not yet fit in the cold state to the larger Nachformstempel considering the thermal expansion and is also not sufficiently deformable, special measures must be taken for this purpose.
Der Erfindung liegt daher die Aufgabe zu Grunde, ein Verfahren und eine Vorrichtung zum Nachformen von Blechen, insbesondere Magnesium und/oder Aluminium enthaltenden Leichtblechen vorzuschlagen, bei denen die erwähnten Probleme nicht auftreten.The invention is therefore based on the object to provide a method and apparatus for reshaping of sheets, especially magnesium and / or aluminum-containing lightweight sheets, in which the mentioned problems do not occur.
Zur Lösung dieser Aufgabe wird ein Verfahren vorgeschlagen, wobei
- a) ein vorgeformtes Blech auf einer Ablagefläche positioniert,
- b) ein Niederhalter auf das Blech abgesenkt,
- c) nach Aufheizen des Bleches auf Umformtemperatur dieses durch Absenken des Bleches gemeinsam mit der Auflagefläche und dem Niederhalter und/oder durch Anheben eines Abkantstempels mit der Oberfläche des Abkantstempels in Berührung gebracht,
- d) zur Nachumformung ein Abkantschieber auf die umzuformenden Bereiche und den Rand des Bleches zubewegt und
- e) nach Lösen des Niederhalters, des Abkantstempels und des Abkantschiebers das nachumgeformte Blech von der Ablagefläche entnommen wird.
- a) positioned a preformed sheet on a shelf,
- b) lowered a hold-down on the sheet,
- c) after heating the sheet to forming temperature of this brought by lowering the sheet together with the support surface and the blank holder and / or by raising a Abkantstempels with the surface of the Abkantstempels,
- d) for Nachumformung a Abkantschieber moved to the reshaped areas and the edge of the sheet and
- e) after loosening the hold-down, the press brake and the press brake, the reshaped sheet is removed from the shelf.
Erfindungsgemäß wird also das Blech vor der Nachumformung, idealerweise im Werkzeug aufgeheizt, wobei vorzugsweise zumindest eines der Werkzeuge, also die Ablagefläche, der Niederhalter und der Abkantstempel direkt und/oder indirekt beheizt und erst nach Erreichen der erforderlichen Umformtemperatur der Abkantstempel mit dem umzuformenden Randbereich des Bleches in Verbindung gebracht, damit anschließend der eigentliche Abkantschieber den Randbereich um die am Abkantstempel vorhandene äußere Kontur herum formen kann.According to the invention, the sheet is heated before the Nachumformung, ideally in the tool, preferably at least one of the tools, ie the tray surface, the hold and the Abkantstempel directly and / or indirectly heated and only after reaching the required forming temperature of the Abkantstempel with the reshaped edge region of the Connected sheet so that then the actual Abkantschieber can form the edge area around the outer contour present on the Abkantstempel.
Die Erfindung wird anhand der beigefügten
- Fig. 1
- in der Draufsicht und schematisch, abgesehen vom
Niederhalter 3 die Umformwerkzeuge,Abkantstempel 4 und 5 undAbkantschieber 6, - Fig. 2
- einen Schnitt nach der Linie A-A zu
Fig. 1 , - Fig. 3
- einen Schnitt nach der Linie B-B von
Fig. 1 in der Phase des Aufheizens, - Fig. 4
- einen Schnitt nach der Linie B-B von
Fig. 1 in der Phase des Absenkens und Schließens der Werkzeuge, - Fig. 5
- einen Schnitt nach der Linie B-B von
Fig. 1 in der Phase des Nachformens und - Fig. 6
- einen Schnitt nach der Linie B-B von
Fig. 1 in der Phase der Entnahme des nachgeformten Bauteiles.
- Fig. 1
- in the plan view and schematically, apart from the hold-
down 3, the forming tools, 4 and 5 and Abkantschieber 6,press brake - Fig. 2
- a cut to the line AA too
Fig. 1 . - Fig. 3
- a section along the line BB of
Fig. 1 in the heating phase, - Fig. 4
- a section along the line BB of
Fig. 1 in the phase of lowering and closing the tools, - Fig. 5
- a section along the line BB of
Fig. 1 in the phase of reshaping and - Fig. 6
- a section along the line BB of
Fig. 1 in the phase of removal of the reshaped component.
In den Figuren ist der Aufbau eines Betriebsmittels zum Nachformen eines randseitigen Flansches mit Hinterschnitt für ein Blech 1 aus Magnesium dargestellt. Das Betriebsmittel besitzt eine beheizbare, als steuerbares Heberelement ausgebildete Ablagefläche 2 für das Blech 1, wobei das nachzuformende Blech 1 in angehobender Stellung über eine möglichst große Ablagefläche 2 auf die entsprechende Umformtemperatur gebracht wird. Da die Temperaturbeaufschlagung am besten von beiden Seiten und im eingespannten Zustand erfolgt, ist als Gegenlager ein ebenfalls beheizbarer, vorzugsweise vollflächig aufliegender Niederhalter 3 vorgesehen. Nach der Aufheizphase wird das Blech 1 auf dem, nach der Wärmeausdehnung passenden, vorzugsweise ebenfalls beheizten Abkantstempel 4, 5 frei abgelegt. In
In den
Das besondere des erfindungsgemäßen Vorschlages ist es, dass erst nach Aufheizen des Bleches 1 auf Umformtemperatur und damit erst nach Erreichen der endgültigen Ausdehnung der starre Abkantstempel 4 oder der als Füllschieber ausgebildete Abkantstempel 5 in die genaue Position gebracht wird.The special feature of the proposal according to the invention is that only after heating the
- 11
- Blechsheet
- 22
- Ablagefläche für 1 (gesteuerter, beheizter Heber)Shelf for 1 (controlled, heated lift)
- 33
- Niederhalter (gefedert und beheizt)Downholder (sprung and heated)
- 44
- Abkantstempel (starr, beheizt)Punching punch (rigid, heated)
- 55
- Abkantstempel (Füllschieber, beheizt)Abkantstempel (Füllschieber, heated)
- 66
- Abkantschieberfolding slide
- 77
- Federfeather
- 88th
- Federfeather
- 9a9a
- umzuformender Bereich von 3 (aufgeheizt)area to be reshaped of 3 (heated up)
- 9b9b
- umzuformender Bereich von 3 (kalt)Range of 3 (cold) to be reshaped
- 9c9c
- umzuformender Bereich von 3 (nach dem Nachformen)Range of 3 to be reshaped (after reshaping)
- 1010
- Rand von 3Edge of 3
- 1111
- äußerer Bereich von 3 (nicht auf 2 aufliegend)outer range of 3 (not resting on 2)
- P1P1
- Doppelpfeil (Bewegungsrichtung von 2)Double arrow (direction of movement of 2)
- P2P2
- Doppelpfeil (Bewegungsrichtung von 3)Double arrow (direction of movement of 3)
- P3P3
- Doppelpfeil (Bewegungsrichtung von 6)Double arrow (direction of movement of 6)
- P4P4
- Doppelpfeil (Bewegungsrichtung von 5)Double arrow (direction of movement of 5)
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910037362 DE102009037362A1 (en) | 2009-08-14 | 2009-08-14 | Method and device for post-forming sheet metal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2292344A1 true EP2292344A1 (en) | 2011-03-09 |
Family
ID=43446377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20100006791 Withdrawn EP2292344A1 (en) | 2009-08-14 | 2010-07-01 | Method and device for reforming sheet metal |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2292344A1 (en) |
DE (1) | DE102009037362A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109570345A (en) * | 2019-01-16 | 2019-04-05 | 重庆至信实业集团有限公司 | A kind of spare tyre reinforcer process units |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6038908A (en) * | 1998-12-08 | 2000-03-21 | Yourbusiness Co., Ltd. | Bending die having rotary die |
DE10128199A1 (en) | 2001-06-11 | 2002-12-19 | Benteler Automobiltechnik Gmbh | Forming device for metal sheets esp. magnesium plates has forming chamber with at least partial heating of metal plate |
US20040129050A1 (en) * | 2003-01-03 | 2004-07-08 | Tadatoshi Kinoshita | Contact surface structure of bending die |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2332287C3 (en) * | 1973-06-25 | 1980-06-04 | Wuerttembergische Metallwarenfabrik, 7340 Geislingen | Method and device for deep drawing of sheet steel |
DE10308521A1 (en) * | 2003-02-26 | 2004-09-16 | Eckold Gmbh & Co Kg | Edge processing apparatus for metal sheets used in vehicle industry, has heat-resistant fixing device for clamping metal sheet with respect to rotating bearing surface of base, and heat-conductive processing tool for processing sheet edges |
DE102006040893B3 (en) * | 2006-08-31 | 2008-01-10 | Benteler Automobiltechnik Gmbh | Sheet component making process for motor vehicle involves deforming sheets in mold parts and using pressing tool |
-
2009
- 2009-08-14 DE DE200910037362 patent/DE102009037362A1/en not_active Withdrawn
-
2010
- 2010-07-01 EP EP20100006791 patent/EP2292344A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6038908A (en) * | 1998-12-08 | 2000-03-21 | Yourbusiness Co., Ltd. | Bending die having rotary die |
DE10128199A1 (en) | 2001-06-11 | 2002-12-19 | Benteler Automobiltechnik Gmbh | Forming device for metal sheets esp. magnesium plates has forming chamber with at least partial heating of metal plate |
US20040129050A1 (en) * | 2003-01-03 | 2004-07-08 | Tadatoshi Kinoshita | Contact surface structure of bending die |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109570345A (en) * | 2019-01-16 | 2019-04-05 | 重庆至信实业集团有限公司 | A kind of spare tyre reinforcer process units |
CN109570345B (en) * | 2019-01-16 | 2023-10-31 | 重庆至信实业集团有限公司 | Spare tire reinforcement production device |
Also Published As
Publication number | Publication date |
---|---|
DE102009037362A1 (en) | 2011-02-17 |
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Effective date: 20110909 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: THYSSENKRUPP SYSTEM ENGINEERING GMBH |
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Effective date: 20150728 |