EP2259883A1 - Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device - Google Patents
Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing deviceInfo
- Publication number
- EP2259883A1 EP2259883A1 EP09730365A EP09730365A EP2259883A1 EP 2259883 A1 EP2259883 A1 EP 2259883A1 EP 09730365 A EP09730365 A EP 09730365A EP 09730365 A EP09730365 A EP 09730365A EP 2259883 A1 EP2259883 A1 EP 2259883A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deep
- workpiece
- bead
- deep drawing
- punch
- 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.)
- Granted
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
- 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
-
- 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
- B21D24/04—Blank holders; Mounting means therefor
-
- 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
- B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
Definitions
- the invention relates to a method for
- the invention relates to a deep-drawing device with a deep-drawn die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep-drawing operation on the guide portion, and with a thermoforming punch, which exerts the force required for deep drawing.
- workpieces can ' be used whose diameter does not exceed the maximum diameter specified by the respective draw-down ratio in relation to a cup deep-drawing test.
- the deep drawing process can then be used only for the production of drawn parts in certain size ranges.
- the flange portions of the workpiece are comparatively narrow, so that increased care must be taken during the deep drawing operation.
- Thermoforming stamp is gradually reduced.
- the predetermined by the Grenzzieh2020 condition can be maintained longer even when using workpieces with large diameters.
- the tooling is increased by this approach.
- the cycle time in production is extended, which reduces the efficiency of the process.
- Facilitating the flow of material from the flange area into the deep-drawn areas by reducing the flow-inhibiting friction of the workpiece on the deep-drawing die and / or hold-down by the use of lubricants can indeed assist, but not fully guarantee, correct process control.
- a material flow control is carried out during the deep drawing of sheets by embossing a Z-shaped shut-off stage in the sheet edge, which inhibits the flow of material.
- the present invention is therefore based on the object to provide a method and an apparatus with which or with which the drawability of a workpiece better utilized and better dimensional accuracy, in particular of the bottom of the drawn part can be achieved.
- the object is achieved by a method for material flow control during deep drawing of a workpiece, wherein the
- Drawing part can be improved. Because by the incorporation of the bead, a pre-stretching of the bottom regions is first achieved, which favors the interaction of the deep-drawing die with the bottom region taking place in the course of the deep-drawing process increment following the incorporation of the bead. In addition, more material from the flange portion of the workpiece can flow into the frame as it approaches the frame. As a result, the risk of material fracture, for example in the region of the frame or the floor, which may be caused in particular by a material accumulation, reduced. Thus, it is possible to achieve a drawing depth with predetermined workpieces, which in particular goes up to a factor of 2.5 beyond the drawing depth predetermined by the known drawing-off ratio.
- the bead is incorporated only in the region to be formed corners of the workpiece.
- the inventive method can be implemented more efficiently. Because in principle, the risk of material jams occurs only in more curved areas such as corners reinforced. In contrast, in largely rectilinear areas of a drawn part, for example on the long side of a rectangular box, the flow behavior of the material may be sufficient, even without the additional provision of a bead, in order to achieve a satisfactory deep drawing result.
- the bead is incorporated with rounded contours.
- the inventive method for use on workpieces made of sensitive materials can be made suitable. Because the roundness of the contours gently modifies the flow behavior of the material. Material impairments due to sharp-angled contours are thus avoided.
- the bead is incorporated with parallel to the deep drawing and / or inclined walls.
- the pre-stretching effected by the incorporation of the bead is advantageously carried out essentially in the deep-drawing direction.
- the process control of the deep drawing process increment following the incorporation of the bead can be improved.
- the object is also achieved by a deep-drawing device, which is particularly suitable for carrying out one as described above
- ZI / jb 070737WO March 31, 2009 Method is suitable, with a deep-drawing die, which has a guide portion and a mold portion, with a hold-down, which supports the positioning of the workpiece during the deep drawing operation on the guide portion, and with a deep-drawing die, which exerts the force required for deep drawing, solved, wherein a is independently operable bead stamp is provided, whose contour is adapted to the contour of the guide portion.
- the beads can be worked into the flange area of the workpiece without having to use a drive coupled to the deep-drawing punch, to the deep-drawing die and / or to the blank holder.
- the operation of the bead punch can be very flexibly tuned to the operation of the other components of the device. This facilitates in particular the process control of the deep-drawing process.
- the bead punch has two or more protrusions.
- two or more depressions are then arranged opposite the projections, into which the projections can be inserted upon actuation of the bead punch. In this way, more than one bead can be incorporated into the material in the flange region of the workpiece with simple means.
- FIG. 1a-g an embodiment of the method according to the invention on a schematically depicted, inventive device in a cross-sectional view.
- FIG. 1a shows a section of a deep-drawing device 2 according to the present invention in a schematic cross-sectional representation.
- the deep-drawing device 2 comprises a deep-drawing die 4, a deep-drawing die 6, the
- the bead punch 12 has on its the guide portion 14 of the deep drawing die 6 side facing two projections 16, which in two at the
- both recesses 18 and both projections 16 each have the same contour.
- the contours can be designed differently with each other when several recesses 18 and projections 16, if appropriate. It is of course also possible to provide only a single recess 18, to which the bead punch 12 is then adapted accordingly.
- the only hold-down 10 is in this example on the side facing away from the deep-drawing die 4 side of the bead punch 12th
- Deep drawing direction inclined extending wall surface which is arranged in this example on the further of the deep-drawing die 4 side of the recess 18, whereas on the deep drawing die 4 closer side of the recess 18 arranged wall surfaces to the deep drawing direction substantially parallel.
- another contour is conceivable.
- a workpiece 20 for example a steel blank, is arranged in the deep-drawing device 2 between the guide section 14 of the deep-drawing die 6 on one side and the punch 12 and the blank holder 10 on the other side.
- Sick punch 12 is in an elevated position, whereas the hold-10 is already applied to the workpiece 20 under slight pressure.
- the deep-drawing die 4 is located in such a position over the deep-drawing die 6 that it is preferably in light contact with the workpiece 20.
- FIG. 1 b shows, in a first step, how the beads 22 are worked into the flange region of the workpiece 20.
- the bead punch 12 is lowered onto the guide section 14 independently of the other components 4, 6, 10. By inserting the projections 16 in the on
- Deep-drawing punch 4 and deep-drawing die 6 arranged portion of the workpiece 20, which is at least partially used for the formation of the soil to. Further, the material is prepared by incorporating the beads 22 for the following deep drawing operation increment. In this simple schematic representation and in the following, a possible change in the thickness of the workpiece 20 is not shown for the sake of clarity.
- the bead punch 12 is again brought into the raised position, so that it is preferably no longer in the plane of the workpiece 20.
- Fig. Ic shows the first deep drawing operation increment.
- Deep-drawing die 4 is moved by a certain distance in the direction of the mold section 8 of the deep-drawing die 6.
- the workpiece 20 is detected by the deep-drawing die 4 and drawn into the mold section 8 by the appropriate distance.
- the distance is just dimensioned such that the material used to form the bead 22, which is closer to the deep-drawing die 4, is completely expended for the deep-drawing operation increment.
- the said bead 22 is largely reshaped from the workpiece 20. In this way, the material can flow well both in largely rectilinear and in more curved areas, for example at corners.
- Fig. Id shows how once again the punch 12 is actuated independently of the other components 4, 6, 10 of the thermoforming device 2 and the beads 22 are incorporated into the remaining flange portion of the workpiece 20.
- the material is fed to the beads 22 substantially from the outer part of the flange.
- thermoforming stamp 4 will continue towards the
- Form section 8 to be driven.
- the deep drawing die 4 closer bead 22 is again almost formed out.
- the thermoforming punch 4 remains in the position shown.
- Fig. If shows the next operation of the bead punch 12.
- the flange has become so narrow by the deep drawing process that only one bead 22 can be incorporated.
- Fig. 1g shows the last deep drawing operation increment.
- Deep-drawing die 4 is moved in this example to the stop on the mold section 8 of the deep drawing die 6.
- the workpiece 20 is thereby almost completely pulled out of the area between the guide section 14 and the punch 12.
- the thermoforming process is over.
- Thermoforming punch 4 can now be raised to remove the finished drawn part of the deep-drawing die 6.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008017728A DE102008017728B4 (en) | 2008-04-07 | 2008-04-07 | Method for material flow control during deep drawing of a workpiece |
PCT/EP2009/053835 WO2009124860A1 (en) | 2008-04-07 | 2009-03-31 | Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2259883A1 true EP2259883A1 (en) | 2010-12-15 |
EP2259883B1 EP2259883B1 (en) | 2013-07-31 |
Family
ID=40727250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09730365.5A Not-in-force EP2259883B1 (en) | 2008-04-07 | 2009-03-31 | Method for controlling the flow of material when deep-drawing a workpiece, and deep-drawing device |
Country Status (4)
Country | Link |
---|---|
US (1) | US9327332B2 (en) |
EP (1) | EP2259883B1 (en) |
DE (1) | DE102008017728B4 (en) |
WO (1) | WO2009124860A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2695101C (en) * | 2010-03-01 | 2012-10-16 | Honda Motor Co., Ltd. | Reducing waste in metal stamping processes and systems therefor |
US10160024B2 (en) * | 2012-06-07 | 2018-12-25 | Toyo Seikan Group Holdings, Ltd. | Deep-drawing method and forming die therefor |
DE102014211220A1 (en) * | 2014-06-12 | 2015-12-17 | Volkswagen Aktiengesellschaft | Sheet metal working tool with at least one retaining device and method for operating this drawing tool |
CN106604787B (en) * | 2014-09-12 | 2018-11-02 | 本田技研工业株式会社 | Impact forming method and plank extension fixture for this method |
DE102015101717A1 (en) | 2015-02-06 | 2016-08-11 | Thyssenkrupp Ag | Method and device for projecting a workpiece |
CN105149455B (en) * | 2015-09-28 | 2017-04-05 | 华南理工大学 | A kind of vertical stilling well drawing forming method and its mould |
US20190255587A1 (en) * | 2018-02-20 | 2019-08-22 | GM Global Technology Operations LLC | Stamped component with improved formability |
US11845122B2 (en) * | 2020-11-24 | 2023-12-19 | Fca Us Llc | Stamping machine and method including variable binder gap |
US11766709B2 (en) * | 2021-03-08 | 2023-09-26 | Ford Global Technologies, Llc | Forming die with reverse bead geometry |
US20230026889A1 (en) * | 2021-07-22 | 2023-01-26 | Ford Motor Company | Controllable and adjustable stamping draw bead with reverse bead geometry |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH629981A5 (en) * | 1978-06-08 | 1982-05-28 | Aluminiumwerke Ag Rorschach | Apparatus for the deep-drawing of a drawn part |
JPS59206120A (en) | 1983-05-07 | 1984-11-21 | Toyota Motor Corp | Method and device for forming drawing press |
US4615205A (en) * | 1984-06-18 | 1986-10-07 | Rca Corporation | Forming a shadow mask from a flat blank |
JPS6427726A (en) * | 1987-07-22 | 1989-01-30 | Honda Motor Co Ltd | Springback preventing press die |
JP2579318B2 (en) | 1987-07-30 | 1997-02-05 | 旭化成工業株式会社 | Underground forming method of columnar hardened body using fabric tubular body |
JPS6433315U (en) * | 1987-08-12 | 1989-03-01 | ||
JP2605324B2 (en) * | 1988-01-21 | 1997-04-30 | 三菱電機株式会社 | SHADOW MASK MOLDING APPARATUS AND SHADOW MASK MOLDING METHOD |
JPH0366423A (en) * | 1989-08-01 | 1991-03-22 | Toyota Auto Body Co Ltd | Forming method by deep drawing and die for drawing press |
IT1239511B (en) * | 1990-03-30 | 1993-11-03 | Videocolor Spa | METHOD OF FORMING A SHADOW MASK FOR A TUBE OF REPRODUCTION OF COLOR IMAGES |
JPH0483419A (en) | 1990-07-26 | 1992-03-17 | Seiko Epson Corp | Semiconductor device |
JP2518827Y2 (en) * | 1990-11-29 | 1996-11-27 | トヨタ車体株式会社 | Drawing device |
DE10209475A1 (en) * | 2002-03-05 | 2003-10-02 | Schuler Pressen Gmbh & Co | Material flow altering device for deep drawing of workpiece has holding element exerting clamping pressure which can be varied |
DE10233008A1 (en) * | 2002-07-20 | 2004-02-12 | Nothelfer Gmbh | Process for material flow control when deep-drawing sheet metal and deep-drawing tool |
DE10334483B4 (en) | 2003-07-29 | 2006-09-28 | Daimlerchrysler Ag | Method and drawing tool for producing a sheet metal part from a circuit board |
JP2005095925A (en) * | 2003-09-24 | 2005-04-14 | Nissan Motor Co Ltd | Method for forming panel parts and laser beam welding method |
DE102006003268B4 (en) * | 2006-01-24 | 2008-02-07 | Ford Global Technologies, LLC, Dearborn | Method and thermoforming device for deep drawing metal sheets |
US8756970B2 (en) * | 2011-03-14 | 2014-06-24 | Ford Global Technologies, Llc | Method of drawing a blank by preforming a channel in a preform that is subsequently drawn into a die cavity |
-
2008
- 2008-04-07 DE DE102008017728A patent/DE102008017728B4/en not_active Expired - Fee Related
-
2009
- 2009-03-31 US US12/936,727 patent/US9327332B2/en not_active Expired - Fee Related
- 2009-03-31 WO PCT/EP2009/053835 patent/WO2009124860A1/en active Application Filing
- 2009-03-31 EP EP09730365.5A patent/EP2259883B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009124860A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102008017728A9 (en) | 2010-08-19 |
US20110094283A1 (en) | 2011-04-28 |
DE102008017728B4 (en) | 2012-05-16 |
US9327332B2 (en) | 2016-05-03 |
DE102008017728A1 (en) | 2009-10-08 |
EP2259883B1 (en) | 2013-07-31 |
WO2009124860A1 (en) | 2009-10-15 |
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