EP3243578B1 - Verfahren und pressenwerkzeug zur herstellung eines komplexen blechformteils mit hoher ziehtiefe - Google Patents

Verfahren und pressenwerkzeug zur herstellung eines komplexen blechformteils mit hoher ziehtiefe Download PDF

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Publication number
EP3243578B1
EP3243578B1 EP17000777.7A EP17000777A EP3243578B1 EP 3243578 B1 EP3243578 B1 EP 3243578B1 EP 17000777 A EP17000777 A EP 17000777A EP 3243578 B1 EP3243578 B1 EP 3243578B1
Authority
EP
European Patent Office
Prior art keywords
punch
tool
hold
matrix
inserts
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.)
Active
Application number
EP17000777.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3243578A3 (de
EP3243578A2 (de
Inventor
Timo Alpen
Holger Dierolf
Jörg Spindler
Torsten Schilling
Bernhard Oberpriller
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.)
Audi AG
Original Assignee
Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP3243578A2 publication Critical patent/EP3243578A2/de
Publication of EP3243578A3 publication Critical patent/EP3243578A3/de
Application granted granted Critical
Publication of EP3243578B1 publication Critical patent/EP3243578B1/de
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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
    • B21D22/20—Deep-drawing
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • 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
    • B21D37/10—Die sets; Pillar guides

Definitions

  • the invention relates to a method for producing a complex sheet metal part by forming a sheet metal by means of press-bound tool (press tool) and a press tool suitable for this purpose.
  • Complex sheet metal parts in particular for use in body construction, differ from simple sheet metal parts (such as a cup or a tub) by a more complex design, typically different surface areas and especially other design features, for example. Design or styling edges and / or Stiffening edges with small radii, includes. Since the forming technology feasibility limits, the production of such complex sheet metal parts is sometimes extremely difficult and expensive. Particular problems exist when high draw depths are to be realized under series production conditions.
  • US2012 / 137749 A1 describes a pressing tool and a pressing method with a movable game insert, which is elastically coupled to the component group of the hold-down.
  • the present invention seeks to provide an improved method and an improved tool for producing a complex and in particular large-area (eg.> 0.5 m ⁇ 2) sheet metal part, with which Series production conditions with perfect part quality a high draw depth is achievable.
  • large-area eg.> 0.5 m ⁇ 2
  • the sheet metal part can be substantially finished, starting from a flat sheet-metal blank, so that no further forming operations, at least no forming operations that increase the drawing depth and / or substantially change the forming design, are required. In a press line thus the required drawing levels can be kept low or even reduced.
  • the tool or press tool may also have stamp inserts, which are not actively, but passively pushed or pushed back in a conventional manner.
  • a design edge is generated with a small radius.
  • the complex sheet-metal shaped part which can be produced by the method according to the invention can therefore also have at least one distinctive design edge, despite the considerable draw depth. Its outer edge radius is preferably only a few millimeters. This design edge is trailing edge-free, since the method according to the invention prevents the sheet from moving relative to the punch insert during the drawing process.
  • the press tool according to the invention is further designed so that between the hold-down and at least one of the punch inserts, preferably all punch inserts, a mechanical coupling (ie, a coupling by means of mechanics), through which the relevant punch insert or the respective punch inserts during displacement and in particular during downward movement of the hold-down (ie, during the forming or pulling operation as described above) is actively moved back, d. H. is moved or retracted into the stamp recess / s provided for this purpose.
  • a mechanical coupling ie, a coupling by means of mechanics
  • the punch inserts are arranged in the press tool, so that in all critical areas at the start of drawing a material storage (as explained above) can be done.
  • At least one of the punch inserts is additionally spring-mounted, for example by means of a gas pressure spring.
  • all punch inserts are additionally spring-mounted.
  • the die may have at least one movable die insert, which is opposite to a punch insert, in particular for forming a design edge, and which is formed with a corresponding mating contour, so that the sheet between the punch insert and the Matrizentown embossed can be transformed.
  • a Matrizenrus is arranged analogously to a punch insert in a Matrizenaus brieflyung and preferably also resiliently mounted, for example. By gas spring.
  • the press tool 100 has a tool lower part 110 and a tool upper part 120.
  • the press tool 100 is a deep-drawing tool, which is installed in a press, not shown, wherein the lower tool part 110 is arranged on the press table and the upper tool part 120 is fixed to the press ram.
  • the tool top 120 performs a downward stroke or stroke with a substantially continuous downward movement.
  • the lower tool part 110 has a punch 130, a lower or sheet holder 140 surrounding the punch 130 and displaceable downwards, and a plurality of movable punch inserts 131, 132 and 133.
  • the punch inserts 131, 132 and 133 are in punch recesses arranged.
  • the punch insert 131 is for line contact and the punch inserts 132 and 133 are formed for point contact.
  • the upper tool part 120 has a die 150, a die ring or counterholder 160 surrounding the die 150, and a movable die insert 151.
  • the tool 100 is designed for a drawing depth of at least 200 mm. The following describes the drawing process.
  • a sheet M in the form of a flat sheet metal blank is inserted and the tool 100 is closed by moving down the press ram or the tool upper part 120.
  • the metal sheet M is clamped in its edge region between the opposite of the die 150 leading die ring 160 and the hold-140, as in Fig. 1a shown.
  • the punch inserts 131, 132 and 133 are in extended positions or starting positions, in which they protrude beyond the stamp surface or surface.
  • the Matrizenring 160 Upon further downward stroke of the upper tool 120, the Matrizenring 160 displaces the hold-down 140 down. D. h., The hold-down 140 is moved together with the die ring 160 downwards and thereby moves relative to the stationary punch 130. (The hold-down 140 can in a conventional manner by a press or tool 100 belonging to the die cushion or supported by the same, as illustrated with the illustrated springs.) In this case, the sheet M is pulled over the extended punch inserts 131, 132 and 133, whereby in the sheet M local Switzerland nursevraatache be generated. This is in Fig. 1b shown.
  • the punch inserts 131, 132 and 133 are, for example, spring-mounted by means of gas springs, as with the springs shown illustrated, so that they press with a defined force against the sheet metal M.
  • the middle punch insert 131 and the opposing die insert 151 a design edge with a small radius is formed in the sheet M, for which purpose the punch insert 131 and the die insert 151 are formed with corresponding forming sections.
  • the die insert 151 is, for example, spring-mounted by means of a gas spring, as illustrated by the symbolically illustrated spring.
  • the die ring 160 and hold-down 140 are eventually moved to their bottom dead center, as in FIG Fig. 1c shown.
  • the punch inserts 131, 132 and 133 are actively, ie not moved back by displacement, whereupon the sheet M in the region of the punch inserts 131, 132 and 133 can successively create the punch surface or effective surface of the punch 130. In this way, therefore, a controlled stamp contact.
  • the local material stocks are released for further forming.
  • the metal sheet M is already formed in a covering area between the die ring 160 and the punch 130, for which purpose the die ring 160 and the punch 130 are formed with corresponding effective surface portions.
  • the moving back or retraction of the punch inserts 131, 132 and 133 is effected by a mechanical positive coupling with the hold-down 140.
  • the punch inserts 131, 132 and 133 for example, attached to a frame or a support plate 180, the or when moving down the hold-down 140 from a certain hold-down position (or from a defined Ziehwegposition) arranged by means of hold-down 140 Carrier 190 taken along or moved.
  • the frame 180 is resiliently supported on the base plate (not shown) associated with the tool base 110, as illustrated with the illustrated springs.
  • the punch inserts 131, 132 and 133 When the hold down 140 has reached its bottom dead center (see Fig. 1c ) are also the punch inserts 131, 132 and 133 in their retracted end positions. Depending on the objective, provision may be made for the punch insert end faces to lie behind the stamp surface (as in FIG Fig. 1c shown), finish flush with the stamp surface or still protrude over the stamp surface.
  • the return movements and the end positions of the punch inserts 131, 132 and 133 are individually interpretable, so that asynchronous punch insert movements are possible. Notwithstanding the shown vertical directions of movement of the punch inserts 131, 132 and 133 and oblique directions of movement are possible, for example. By using slides.
  • the trailing die 150 is now moved to its lower dead center, wherein the sheet metal M or the sheet metal shaped part is still finished in the middle region (in the outer region, the forming is already completed). That is, the die ring 160 first reaches its bottom dead center, then the die 150 continues to run to its bottom dead center, thereby forming the center region.
  • Fig. 1d shows the final state in which the hold-down 140, the die ring 160 and the die 150 are in their lowerfoldsstot Vietnameseen.
  • the sheet or sheet metal workpiece M is fully formed.
  • the sheet metal part can be removed.
  • the tool parts move into the in Fig. 1a shown starting positions or positions, so that the next sheet M can be inserted and transformed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP17000777.7A 2016-05-13 2017-05-05 Verfahren und pressenwerkzeug zur herstellung eines komplexen blechformteils mit hoher ziehtiefe Active EP3243578B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016005902.8A DE102016005902B3 (de) 2016-05-13 2016-05-13 Verfahren und Pressenwerkzeug zur Herstellung eines komplexen Blechformteils mit hoher Ziehtiefe

Publications (3)

Publication Number Publication Date
EP3243578A2 EP3243578A2 (de) 2017-11-15
EP3243578A3 EP3243578A3 (de) 2017-11-22
EP3243578B1 true EP3243578B1 (de) 2018-10-03

Family

ID=58672257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17000777.7A Active EP3243578B1 (de) 2016-05-13 2017-05-05 Verfahren und pressenwerkzeug zur herstellung eines komplexen blechformteils mit hoher ziehtiefe

Country Status (5)

Country Link
US (1) US10646911B2 (ja)
EP (1) EP3243578B1 (ja)
JP (1) JP6370437B2 (ja)
CN (1) CN107363147B (ja)
DE (1) DE102016005902B3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021100281B3 (de) 2021-01-11 2022-05-05 Audi Aktiengesellschaft Umformwerkzeug sowie Verfahren zum Betreiben eines Umformwerkzeugs

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JP6721544B2 (ja) * 2017-06-28 2020-07-15 株式会社神戸製鋼所 プレス成形品の製造方法
CN108856513A (zh) * 2018-07-08 2018-11-23 苏州华吉威自动化设备有限公司 一种折弯冲压模具
JP6670409B1 (ja) * 2019-03-11 2020-03-18 マレリ株式会社 プレス装置及びプレス方法
JP7111063B2 (ja) * 2019-06-04 2022-08-02 Ｊｆｅスチール株式会社 プレス成形装置
FR3122589B1 (fr) * 2021-05-06 2023-04-21 Psa Automobiles Sa Outil de presse à emboutir pour emboutir un flan de tôle et procédé d’emboutissage correspondant.

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JPS6038622U (ja) * 1983-08-25 1985-03-18 トヨタ自動車株式会社 絞り型構造
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US5600991A (en) 1995-02-10 1997-02-11 Ogihara America Corporation Stretch controlled forming mechanism and method for forming multiple gauge welded blanks
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021100281B3 (de) 2021-01-11 2022-05-05 Audi Aktiengesellschaft Umformwerkzeug sowie Verfahren zum Betreiben eines Umformwerkzeugs
EP4026626A1 (de) 2021-01-11 2022-07-13 Audi AG Umformwerkzeug sowie verfahren zum betreiben eines umformwerkzeugs

Also Published As

Publication number Publication date
DE102016005902B3 (de) 2017-06-29
US10646911B2 (en) 2020-05-12
CN107363147A (zh) 2017-11-21
US20170326612A1 (en) 2017-11-16
JP6370437B2 (ja) 2018-08-08
EP3243578A3 (de) 2017-11-22
EP3243578A2 (de) 2017-11-15
JP2017202525A (ja) 2017-11-16
CN107363147B (zh) 2019-02-19

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