EP1207974B1 - Tiefziehverfahren und tiefziehwerkzeug - Google Patents

Tiefziehverfahren und tiefziehwerkzeug Download PDF

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Publication number
EP1207974B1
EP1207974B1 EP01921328A EP01921328A EP1207974B1 EP 1207974 B1 EP1207974 B1 EP 1207974B1 EP 01921328 A EP01921328 A EP 01921328A EP 01921328 A EP01921328 A EP 01921328A EP 1207974 B1 EP1207974 B1 EP 1207974B1
Authority
EP
European Patent Office
Prior art keywords
deep
pressure
drawing die
die
chamber
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 - Lifetime
Application number
EP01921328A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1207974A1 (de
Inventor
Josef Hautzinger
Torsten Krachhudel
Franz Kaderabek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blanco GmbH and Co KG
Original Assignee
Blanco GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Blanco GmbH and Co KG filed Critical Blanco GmbH and Co KG
Publication of EP1207974A1 publication Critical patent/EP1207974A1/de
Application granted granted Critical
Publication of EP1207974B1 publication Critical patent/EP1207974B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/12—Stamping using yieldable or resilient pads using enclosed flexible chambers
    • 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
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/12—Stamping using yieldable or resilient pads using enclosed flexible chambers
    • B21D22/125—Stamping using yieldable or resilient pads using enclosed flexible chambers of tubular products
    • 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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles

Definitions

  • the present invention relates to a deep-drawing process in a drawn part in a deep-drawing tool between a first one Deep-drawing tool part and a second deep-drawing tool part arranged and by relative movement of the deep-drawing tool parts is formed to each other, as well as a deep-drawing tool according to the preamble of claim 13.
  • the material of the drawn part is steel, then martensite is formed especially during the first drawing process, which the deformability of the drawn part in another Thermoforming process reduced.
  • cooling and washing processes are the well-known multi-pass Thermoforming process very time and energy consuming.
  • the present invention is therefore based on the object to create a deep-drawing process of the type mentioned at the outset, which - especially when performing several consecutive Pulling operations - saves time and energy than the well-known deep-drawing processes.
  • This task is carried out in a deep-drawing process with the characteristics of preamble 1 solved according to the invention in that at a limited pressure section of one of the deep-drawing tool parts selectively one that changes over time during the drawing process Pressure is generated, which one at the printing section adjacent section of the drawn part against each other deep-drawing tool part presses.
  • the solution according to the invention is based on the concept by targeting a limited area of the Drawn part during the drawing process for the deformation sufficient flow of the material of the drawn part even then to achieve if the flowability of the material of the drawn part per se based on the history of the material, for example due to a previous previous pull, is reduced.
  • thermoforming processes are also omitted if the thermoforming process is carried out several times.
  • the deep-drawing process according to the invention allows a special to achieve large draw ratios, and leads to higher ones Dimensional stability of the drawn parts.
  • the method provides that the pressure at the printing section by means of a hydraulic or pneumatic pressure fluid is produced.
  • the hydraulic generation of pressure on one of the deep-drawing tool parts is in itself of the so-called Hydroforming process known in which the drawing body is provided with a membrane which during the forming process is put under water pressure.
  • the drawing punch presses this process the drawn part against the membrane on the drawn body, the drawing part by the counteracting water pressure is reshaped.
  • the whole Drawn part exposed to the same water pressure during the drawing process, while in the deep-drawing process according to the invention only on a limited pressure section of one of the deep-drawing tool parts a pressure is selectively generated which each limited portion adjacent to the printing section of the drawn part against the other deep-drawing tool part presses.
  • water pressure acting on the drawing part during the drawing process constant.
  • a variant of the hydroforming process is the so-called Hydro-Mec process, in which the drawn part by a descending drawing stamp into pressurized water is pressed in without a membrane on the drawing body is provided.
  • This method is also not selective Loading a limited portion of the drawn part with a pressure that changes over time during the drawing process intended.
  • Thermoforming is provided that the pressure on the Printing section according to a predetermined temporal pressure curve is controlled and / or regulated.
  • This pressure curve can provide, for example, that the Pressure section without pressure during a first deformation phase is switched and that during a second deformation phase at the pressure section an increased, over the second deformation phase constant pressure is generated throughout.
  • Such a Pressure curve is particularly easy to control and / or regulate.
  • the deformability of the drawn part during the drawing process is particularly increased when the printing section is substantially parallel to the direction of drawing, along which the deep-drawing tool parts are moved relative to each other, aligned is.
  • it can be essentially parallel Areas of the drawn part that are aligned with the pulling direction aligned substantially parallel to the direction of pull Areas of the other deep-drawing tool part be pressed, what with the conventional deep-drawing process not possible.
  • essentially Side wall areas aligned parallel to the direction of pull of the drawn part can be formed particularly precisely.
  • the deep-drawing method according to the invention has proven particularly useful when only the frame of the drawn part during of the drawing process with the time-varying pressure is applied to the printing section.
  • Such a deep drawing process is particularly suitable for the production of Gastronorm food containers that have a great depth and tend to have undesirable bulges in the frame area train which leads to poor stackability the food container can lead.
  • the frame of the Gastronorm food container during the pulling process with the time-varying pressure on the Print section can prevent such bulging or a bulge generated in a previous deep-drawing process be eliminated.
  • the printing section is annular.
  • the pressure changes over time is generated by means of a pressure generating device which a chamber for receiving a pressurized fluid and an elastically deformable chamber wall for transmission of the pressure from the pressurized fluid on the drawing member.
  • Such a chamber can in particular have an annular shape his.
  • Such a chamber is particularly easy to manufacture, if they partially through the elastically deformable chamber wall and partly through a chamber boundary wall from one of the Different material of the elastically deformable chamber wall Material, preferably made of a metallic material, in particular made of aluminum, is limited.
  • the pressure section on the first deep-drawing tool part or arranged on the second deep-drawing tool part his. It can further be provided that both the first deep-drawing tool part as well as the second deep-drawing tool part in each case have one or more printing sections on which a time-varying one during the drawing process Pressure is generated.
  • the first deep-drawing tool part as a drawing body and the second deep-drawing tool part is designed as a drawing stamp and that the printing section is arranged on the drawing body.
  • the deep-drawing process according to the invention is particularly advantageous if the drawn part at preformed in a first drawing operation and in a second Pulling process, in which the pressure changes over time the printing section is generated, is deformed.
  • the case may be that required in the known deep-drawing processes Annealing and the resulting cooling and Washing operations are dispensed with before the second drawing operation, which is a significant time and energy saver brings.
  • the two drawing processes can be done in the same deep drawing tool be carried out, usually a replacement of the deep-drawing tool parts required between the drawing processes will be, or the two pulls will be in various deep drawing tools, which is suitable for Series production is recommended, since in this case the required drawing process, deep drawing tool parts in the respective deep-drawing tool can remain.
  • the present invention further relates to a deep-drawing tool, comprising a first deep-drawing tool part and a second Deep-drawing tool part, in which a drawn part by relative movement the deep-drawing tool parts can be formed relative to one another.
  • the present invention is based on the further object to create such a deep-drawing tool with the Help drawn parts - especially as part of a multi-pass Thermoforming process - time and energy saving than with known ones Thermoforming tools are deformable.
  • This task is performed on a deep-drawing tool with the characteristics of the preamble of claim 13 according to the invention solved that one of the deep-drawing tool parts a limited Has printing section on the during the drawing process selectively a time-variable pressure can be generated which is a portion abutting the printing portion of the drawn part against the other deep-drawing tool part presses.
  • FIGS. 1 to 5 A purely schematically shown in FIGS. 1 to 5, as The whole of a deep-drawing tool, designated 100, comprises one Base plate 102, one stationary on the top of the base plate 102 arranged drawing die 104, one the drawing die 104 ring-shaped sheet metal holder 106, which on a also the punch 104 ring-shaped surrounding support plate 108 is arranged, which by means of a (not shown) hydraulic movement device vertically movable quill 110 is worn, so that the support plate 108 with the sheet metal holder 106 arranged thereon along the vertical pulling direction 112 is movable.
  • a hydraulic movement device vertically movable quill 110 is worn, so that the support plate 108 with the sheet metal holder 106 arranged thereon along the vertical pulling direction 112 is movable.
  • the deep-drawing tool 100 further comprises one above the drawing die 104 and the sheet holder 106 arranged drawing body 114, which in turn has an annular pull ring base 116 and a drawing ring 118 held on the underside thereof includes.
  • the pull ring base 116 is at one on its top Holding plate 120 held by means of a (not shown) hydraulic movement device along the direction of pull 112 relative to the die 104 and the sheet metal holder 106 is movable.
  • the drawing body 114 forms the first deep-drawing tool part 122 the deep drawing tool 100; the drawing die 104 forms that second deep-drawing tool part 124 of the deep-drawing tool 100.
  • the deep-drawing tool 100 is then closed by the drawing body by means of the hydraulic (not shown) Movement device from its upper starting position as far down along the direction of pull 112, until the bottom of the pull ring 118 at the top of the Board 126 abuts and the edge of the board 126 between the Drawing ring 118 and the sheet metal holder 106 is clamped (see Fig. 3).
  • the board 126 becomes a drawn part 128 by means of the (not shown) hydraulic motion device the quill 110 with the support plate 108 arranged thereon and the sheet metal holder 106 and the drawing body 114 along the drawing direction 112 relative to the punch 104 down by the depth of draw can be moved, with the edge between the Drawing ring 118 and the plate holder 106 held circuit board 126 to the outer contours of the drawing ring 118 and the drawing punch 104 nestles (see Fig. 4).
  • the quills 110 with the arranged thereon Carrier plate 108 and the sheet holder 106 in their moved back to the upper starting position and the deep-drawing tool 100 opened by the drawing body 114 further along the drawing direction 112 moved up to its upper starting position will (see Fig. 5).
  • the deep-drawn part has 128 have not yet received the desired final shape.
  • the finished drawn part should have the shape of a Gastronorm food container that with a stacking heel running below its upper edge 130 132 is provided.
  • the depth of the finished Food container may be greater than the depth of the drawn part 128 after the first thermoforming process, while the length and the The width of the finished food container is smaller in the frame area should be as in the one obtained by the first drawing process Draw 128.
  • the basic principle of the second deep-drawing tool 100 corresponds Structure of the first deep-drawing tool described above 100, the drawing punch 104 and the drawing body 114 'are shaped accordingly to the desired reshaping of the drawn part 128.
  • the drawing body 114 'of the second deep-drawing tool further comprises 100 'a pressure generating device designated as a whole by 134 to generate a variable pressure.
  • the device 134 in turn comprises a pressure bubble ring 136, which is in an annular recess 138 on the inside the drawing ring base 116 is included and a has annular pressure bubble chamber 140 by a Chamber wall 142 made of an elastically deformable material, for example made of a polyurethane.
  • a fluid under pressure for example a hydraulic oil from a fluid pressure pump (not shown) is feedable.
  • the second deep-drawing tool 100 ' is opened by the drawing body 114 'and the sheet holder 106 in their upper Starting positions are brought (see Fig. 6). Since that Drawn part 128 is already pre-deformed by the first deep-drawing process is the top of the sheet holder 106 in the starting position below the top of the drawing die 104 may be arranged.
  • Deep-drawn part 128 inserted into deep-drawing tool 100 ' and placed on the sheet holder 106.
  • the second deep-drawing tool 100 ' is then closed by the pulling body 114 'along the pulling direction 112 downwards is moved until the underside of the drawing ring 118 on the Bottom of the edge 130 of the drawn part 128 abuts and Edge of the drawing part 128 between the drawing ring 118 and the Sheet holder 106 is clamped.
  • a first deformation phase is carried out, by the quill 110 with the support plate arranged thereon 108 and the sheet metal holder 106 together with the drawing body 114 ' along the drawing direction 112 relative to the drawing punch 104 be moved down until the remaining drag a distance h is (see Fig. 7).
  • the pressure bubble ring 136 is depressurized, that is, the fluid pressure pump is switched off or the fluid supply lines 144 are through a (not shown) Check valve separated from the fluid pressure pump, see above that the fluid located in the pressure bubble chamber 140 under is no higher than atmospheric pressure.
  • the fluid in the pressure bubble chamber 140 is increased Pressure p is applied by the fluid pressure pump in operation taken and / or the check valve between the fluid pressure pump and opening the fluid supply lines 144.
  • the elastically deformable chamber wall 142 of the pressure bubble ring 136 transmits the increased pressure of the fluid in the pressure bubble chamber 140 on the pressure bubble ring 136 Section of the frame 146 of the drawn part 128, which by the aligned substantially parallel to the direction of pull 112 Side walls of the drawing part 128 is formed so that this Section of frame 146 under increased pressure against the Drawing punch 104 is pressed.
  • the drawn part becomes 128 finished by the quill 110 with the arranged thereon Carrier plate 108 and the sheet holder 106 together with the drawing body 114 'along the drawing direction 112 relative to the Pull punch 104 can be moved down until the desired one Drawing depth for the second deep drawing process has been reached (see Fig. 8).
  • the pressure bubble ring 136 is depressurized again switched by the fluid pressure pump switched off and / or the check valve between the fluid pressure pump and the fluid supply lines 144 closed to the pressure bubble ring 136 becomes.
  • the second deep-drawing tool 100 ' is then opened, by the quill 110 with the support plate arranged thereon 108 and the sheet holder 106 moved into the upper starting position and then the drawing body 114 'further along the direction of pull 112 up to its upper starting position is driven so that the finished drawn part 128 accessible from outside the deep-drawing tool 100 ' and can be removed from the deep-drawing tool 100 ' (see Fig. 9).
  • the pulling part 128 now has the desired final shape of a Gastronorm food container (see Fig. 10).
  • 11 to 13 show a preferred embodiment in detail a pressure bubble ring 136, as in the invention Thermoforming process can be used.
  • the bladder ring 136 includes an outer ring 150 from an elastically deformable material, for example from Polyurethane, in which a chamber limiting ring 152, the for example made of a metallic material, in particular can consist of aluminum, is embedded.
  • an elastically deformable material for example from Polyurethane
  • a chamber limiting ring 152 the for example made of a metallic material, in particular can consist of aluminum, is embedded.
  • the outer ring 150 is made by the chamber restriction ring 152 into a casting mold, the inner contours of which Corresponds to the outer contours of the outer ring 150, is introduced and the space between the mold and the chamber restriction ring 152 is poured out with polyurethane.
  • the inside of the chamber delimitation ring 152 is included provided a release agent so that the outer ring 150 made of polyurethane only on the outside of the chamber limiting ring 152 adheres while on the inside of the chamber restriction ring 152 the material of the outer ring 150 from the chamber restriction ring 152 can be lifted off.
  • Bubble ring 136 becomes the chamber restriction ring 152 from one connecting piece 154 each, for example made of steel, penetrates, which from the chamber boundary ring 152 to Outside of the outer ring 150 leads and on its outer End can be connected to a fluid supply line 144.
  • the outer ring 150 of the pressure bubble ring 136 is made of polyurethane manufactured, so a hydraulic oil as a pressure fluid can be used to fill the pressure bubble chamber 140.
  • the outer ring 150 of the pressure bubble ring 136 made of natural rubber, so instead is as Pressurized fluid to use a castor oil, for example, since natural rubber is attacked by hydraulic oil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
EP01921328A 2000-05-13 2001-03-13 Tiefziehverfahren und tiefziehwerkzeug Expired - Lifetime EP1207974B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10023533 2000-05-13
DE10023533A DE10023533A1 (de) 2000-05-13 2000-05-13 Tiefziehverfahren und Tiefziehwerkzeug
PCT/EP2001/002795 WO2001087511A1 (de) 2000-05-13 2001-03-13 Tiefziehverfahren und tiefziehwerkzeug

Publications (2)

Publication Number Publication Date
EP1207974A1 EP1207974A1 (de) 2002-05-29
EP1207974B1 true EP1207974B1 (de) 2004-09-15

Family

ID=7641955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01921328A Expired - Lifetime EP1207974B1 (de) 2000-05-13 2001-03-13 Tiefziehverfahren und tiefziehwerkzeug

Country Status (8)

Country Link
US (1) US6622539B2 (xx)
EP (1) EP1207974B1 (xx)
AT (1) ATE276059T1 (xx)
AU (1) AU4834301A (xx)
DE (2) DE10023533A1 (xx)
ES (1) ES2223819T3 (xx)
TR (1) TR200402727T4 (xx)
WO (1) WO2001087511A1 (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248083A (zh) * 2011-07-02 2011-11-23 东莞市祥鑫汽车模具制品有限公司 一种带拉伸边产品生产模具
CN103567295A (zh) * 2013-10-11 2014-02-12 中航飞机股份有限公司西安飞机分公司 一种钣金零件的拉深成形方法及成形装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7237423B1 (en) 2004-11-12 2007-07-03 Miller Tool And Die Company Inc. Apparatus for stretch forming blanks
US7337645B2 (en) * 2006-07-27 2008-03-04 Ford Motor Company Draw press with a fixed draw punch and a floating draw punch
FR2941635B1 (fr) * 2009-02-04 2012-04-06 Wuu Shiang Ind Co Ltd Methode de formation de tole en metal a haute resistance elastique
CN104985058B (zh) * 2015-07-14 2017-06-06 中航飞机股份有限公司西安飞机分公司 一种板制对称的半弯管零件拉深成形方法及成形模具
CN105665511B (zh) * 2016-04-22 2017-07-28 山东多星电器有限公司 一种锅体拉伸机

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
GB1176591A (en) * 1967-07-15 1970-01-07 S M G Suddeutsche Maschb Ges M Improvements in Hydro-Mechanical Deep Drawing
US3739616A (en) * 1971-09-21 1973-06-19 Reynolds Metals Co Apparatus for and method of forming a tubular metal blank into a tapered tube on a tapered mandrel
NL181914C (nl) * 1977-07-05 1900-01-01 Toyo Seikan Kaisha Ltd Inrichting voor het vervaardigen van getrokken voorwerpen.
FR2448946A1 (fr) * 1979-02-14 1980-09-12 Cuq Pierre Procede d'emboutissage, avec conformage centripete du flan
US4331017A (en) * 1980-12-11 1982-05-25 Joseph Bulso, Jr. High reduction process and apparatus
JPS58181431A (ja) * 1982-04-20 1983-10-24 Kazuhiko Nakamura 周液圧重畳式対向液圧成形法
US4550585A (en) * 1984-10-12 1985-11-05 Naoyoshi Sasaki Device for holding a workpiece in a press
JP2812201B2 (ja) * 1994-07-15 1998-10-22 トヨタ自動車株式会社 プレス装置
US5755129A (en) * 1995-05-10 1998-05-26 Nkk Corporation Press-forming method of a sheet and apparatus therefor
GB9510572D0 (en) * 1995-05-26 1995-07-19 Metal Box Plc Containers
DE19608985A1 (de) * 1996-03-08 1997-09-11 Fritz Prof Dr Ing Dohmann Ziehverfahren und -vorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102248083A (zh) * 2011-07-02 2011-11-23 东莞市祥鑫汽车模具制品有限公司 一种带拉伸边产品生产模具
CN103567295A (zh) * 2013-10-11 2014-02-12 中航飞机股份有限公司西安飞机分公司 一种钣金零件的拉深成形方法及成形装置

Also Published As

Publication number Publication date
US6622539B2 (en) 2003-09-23
DE50103612D1 (de) 2004-10-21
ATE276059T1 (de) 2004-10-15
ES2223819T3 (es) 2005-03-01
DE10023533A1 (de) 2001-12-06
TR200402727T4 (tr) 2004-11-22
US20020083756A1 (en) 2002-07-04
EP1207974A1 (de) 2002-05-29
WO2001087511A1 (de) 2001-11-22
WO2001087511A8 (de) 2002-05-30
AU4834301A (en) 2001-11-26

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