EP3970877A1 - Outil de presse permettant de former une pièce et procédé de formage d'une pièce - Google Patents

Outil de presse permettant de former une pièce et procédé de formage d'une pièce Download PDF

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Publication number
EP3970877A1
EP3970877A1 EP21189179.1A EP21189179A EP3970877A1 EP 3970877 A1 EP3970877 A1 EP 3970877A1 EP 21189179 A EP21189179 A EP 21189179A EP 3970877 A1 EP3970877 A1 EP 3970877A1
Authority
EP
European Patent Office
Prior art keywords
lower beam
slide
filling
pressing
forming
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.)
Pending
Application number
EP21189179.1A
Other languages
German (de)
English (en)
Inventor
Rilana Bachmann
Sören Rudolph
Heiko Tiemann
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP3970877A1 publication Critical patent/EP3970877A1/fr
Pending 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/082—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/082—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles
    • B21D19/084—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for making negative angles with linear cams, e.g. aerial cams
    • 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
    • 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
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices
    • B21D45/04—Ejecting devices interrelated with motion of tool

Definitions

  • the invention relates to a pressing tool according to the preamble of claim 1 and a method for forming a workpiece by means of such a pressing tool.
  • Pressing tools according to the preamble of claim 1 are particularly suitable for pressing workpieces with undercut geometries and for inserting workpieces to be machined into the pressing tools and for being able to remove them again more easily.
  • the generic pressing tool has a movable lower beam, which can be displaced between a filling position and a pressing position. This moveable lower beam has a forming area against which the workpiece to be machined is pressed during a forming process. In order to shift the lower beam between the filling position and the pressing position, the pressing tool has a filling slide.
  • a generic pressing tool also has a displaceable upper beam with a forming area, which can be displaced against the forming area of the lower beam in its pressing position, so that the workpiece can be formed between the forming area of the lower beam and the forming area of the upper beam during the forming process.
  • a generic pressing tool has a press slide, which is designed to lock the lower beam in the pressing position, so that the lower beam remains in the pressing position during the forming process and cannot be pushed back in the direction of the filling position by the application of force through the upper beam.
  • both the filling slides and the pressing slides are driven hydraulically and/or pneumatically. Only electric valves for controlling such systems are known.
  • a pressing tool in the form of an electrically driven swivel bending machine which has a fixed lower beam and a swiveling upper beam.
  • the upper beam can be rotated into different usage positions and can be locked in a rotationally fixed manner in the different usage positions by means of a locking mechanism.
  • Pressing tools with additional slides for additional functions are also known.
  • the additional slides can be used, for example, to fix the workpiece to be machined on the pressing tool during the forming process, as can be seen from DE 10 2009 037 854 A1 is known.
  • the workpiece to be machined is clamped between a hold-down device and a plate, so that the workpiece is fixed when the hold-down device and the plate move together in the direction of a punch.
  • a pressing tool with an additional slide is also known.
  • the document discloses a pressing tool which, for the purpose of increased mobility between a setting head with a joining stamp and a frame piece, has an actuating arm which carries the setting head. This serves to create a free space above the setting head in order to be able to process workpieces with an interference contour.
  • Pneumatic drives have a number of disadvantages. They have a relatively high energy loss, are susceptible to temperature fluctuations, and their power is limited compared to hydraulic drives. The masses to be driven vary from 50 kg to 2.5 tons. Pneumatic drives also require the use of fixed stops and shock absorbers. End position sensors and/or proximity switches are required to monitor such systems, for example to query the positions of the individual elements. Each slide is equipped with a pneumatic end position query, for example a mechanically actuated valve, for monitoring purposes, in order to ensure trouble-free sequential operation of the pressing tool. The compressed air has to be processed and requires additional energy due to the need for compressors, which in turn cause noise in the trades using it.
  • Hydraulic systems also have a number of disadvantages. Hydraulic systems are also temperature sensitive, they have high hydraulic fluid filtration requirements and there is always a risk of leakage. Over time, the hydraulic fluid increases in compressibility, after which the entire system requires maintenance. Forces, energy and signals are also transmitted via a liquid in hydraulic systems.
  • the liquids used are, for example, mineral oils. These liquids can have a harmful impact on the environment. Increased safety precautions must therefore be taken in the respective plants.
  • the object of the invention is to further develop a generic pressing tool in such a way that the disadvantages of the prior art mentioned are avoided or reduced.
  • a pressing tool for forming a workpiece in particular for forming an automotive sheet metal part, which has the following features.
  • the forming area of the lower beam and the forming area of the upper beam are preferably designed in such a way that the workpiece is given an undercut component geometry during the forming process.
  • the pressing tool has a displaceable lower beam with a forming area, which can be displaced between a filling position and a pressing position. It also has a displaceable upper beam with a forming area, which can be displaced against the forming area of the lower beam in its pressing position, so that the workpiece can be formed during a forming process between the forming area of the lower beam and the forming area of the upper beam.
  • the pressing tool also has a filling slide, which is designed to move the lower beam between the filling position and the pressing position.
  • a filling slide which is designed to move the lower beam between the filling position and the pressing position.
  • the pressing tool has a press slide which is designed to lock the lower beam in the pressing position.
  • the press slide preferably leads to a form fit between the lower beam and a base, so that the lower beam remains in its pressing position during the forming process.
  • the pressing tool according to the invention has an electric drive for the filling slide and/or an electric drive for the pressing slide in order to shift the lower beam between the filling position and the pressing position and/or to lock the lower beam in the pressing position during the forming process.
  • the drives are always pneumatic or hydraulic.
  • the electric drive for the filling slide and/or the electric drive is preferred Drive designed for the press slide without an intermediate gear.
  • the electric drive for the filling slide and/or the electric drive for the press slide can be designed with fewer moving parts.
  • a drive without an interposed gear is advantageous because fewer friction losses can occur and more precise control is possible.
  • the filling slide and/or the pressing slide is preferably driven by an electric AC servomotor.
  • Both the filling slide and the press slide preferably have an electric drive. It is conceivable that only the filling slide or the press slide has an electric drive. Due to the many advantages of the electric drive mentioned above, however, it is preferred that both the filling slide and the compression slide each have an electric drive.
  • condition monitoring is based on regular or permanent recording of machine statuses through measurements and analyzes of physical variables, e.g. B. from the position and proximity of the moving components.
  • condition monitoring is based on regular or permanent recording of machine statuses through measurements and analyzes of physical variables, e.g. B. from the position and proximity of the moving components.
  • electric drives By using electric drives, the use of expensive shock absorbers and a pneumatic end position query can be dispensed with.
  • the use of electric drives also reduces system inertia. This in turn results in lower energy consumption. The maintenance effort of such a pressing tool is significantly reduced.
  • the lower beam can preferably be displaced linearly between the filling position and the pressing position.
  • the present invention also includes configurations in which the lower beam can be displaced between the filling position and the pressing position by a pivoting and/or rotary drive.
  • the filling slide is preferably an integral part of the lower beam, so that the filling slide and the lower beam are designed in one piece. This design makes the lower beam particularly easy to construct. However, it is also possible for the filling slide to be mountable, for example, on the lower beam, or for the lower beam to rest on the filling slide, for example due to gravity.
  • the electric drive of the filling slide and/or the electric drive of the press slide preferably has a servo motor, particularly preferably an AC servo motor, particularly preferably a synchronous servo linear motor SL2.
  • the servo motor is not to be understood as the design of the motor, but rather as its function.
  • any electric motor that is able to reach a sufficiently precise position can be used as a servomotor.
  • most electric drives require an electronic assembly that continuously generates information about the position and/or speed of the drive.
  • Stepper motors, asynchronous motors, synchronous motors, direct current motors, for example, can be considered as types of drive.
  • stepper motor Since the movement of the stepping motor can be determined with sufficient accuracy using the number of steps supplied by a controller, an electronic assembly as described above can generally be dispensed with.
  • the electric drive of the filling slide and/or the electric drive of the press slide preferably has an electronic controller.
  • both the filling slide and the press slide have an electric drive, they preferably have a common electronic control. This control enables For example, the pressing tool can be integrated into an assembly line. It enables precise and timely control of the pressing tool.
  • the electric drive of the filling slide and/or the electric drive of the press slide preferably has a communication interface with which the drive of the filling slide and/or with which the drive of the press slide can be connected to the electronic control mentioned above.
  • the communication interface particularly preferably enables functions and/or real-time properties of the electric drive of the filling slide and/or of the electric drive of the press slide to be queried.
  • tachometer generators, resolvers, pulse generators, sine encoders, position encoders and combinations thereof can be used as communication interfaces.
  • the communication interface preferably corresponds to an Industrial Ethernet standard, particularly preferably the Process Field Network Standard (Profinet) of the PROFI BUS user organization e. V. (PNO).
  • Profilet Process Field Network Standard
  • a higher-level control unit which, for example, receives commands, compares target values with actual values and supplies a current value suitable for the electric drive.
  • This control unit is often also referred to as a controller, servo amplifier or regulator.
  • the pressing tool By combining the electric drives with the communication interface, the pressing tool can be digitized in a particularly simple manner. Performance data of the pressing tool can thus be determined in a particularly simple manner.
  • the electric drives and the communication interface enable preventive maintenance or servicing of the pressing tool. In this way, press tool downtimes within a production time can be minimized, short maintenance times on the press tool can be guaranteed and the effects of a press tool standstill on an overall production flow can be minimized.
  • the invention also relates to a method for operating a pressing tool of the type described above.
  • a displaceable lower beam with a forming area is displaced into a filling position by means of a filling slide.
  • a workpiece to be formed is then placed on the lower beam.
  • the workpiece can also be fixed on the lower beam, for example by a fixing means between the lower beam and the upper beam.
  • the workpiece is merely placed on the lower beam.
  • the lower beam is then shifted into a pressing position by means of the filling slide and a pressing slide is pushed onto the lower beam in such a way that the lower beam remains in the pressing position during a forming process and cannot be shifted back towards the filling position by the force of the upper beam.
  • an upper beam with a forming area is then pressed against the forming area of the lower beam, so that the workpiece is formed during a forming process between the forming area of the lower beam and the forming area of the upper beam.
  • the press slide is shifted back from the lower beam in such a way that the lower beam is released again.
  • the lower beam can be shifted back from the pressing position to the filling position.
  • the lower beam is moved back to the filling position using the filling slide. Finally, the formed workpiece can be removed from the pressing tool.
  • FIG. 1 shows a pressing tool 10 for forming workpieces 100, in this example a sheet metal part of a motor vehicle with an undercut geometry.
  • the pressing tool 10 has a displaceable lower beam 20 which can be displaced between a filling position and a pressing position.
  • the displaceable lower beam 20 has a forming area 22 against which the workpiece 100 to be machined is pressed during a forming process.
  • This forming area 22 is the shaping section for the workpiece 100 to be machined on the lower beam 20.
  • the pressing tool 10 has a filling slide 40.
  • the filling slide 40 is formed by a section of the lower beam 20.
  • the filling slide 40 is connected to the lower beam 20 in one piece.
  • the filling slide 40 has an electric drive 42.
  • the electric drive 42 has a servo linear motor.
  • the electric drive 42 also has a communication interface 44.
  • the electric drive 42 of the filling slide 40 is connected to an electronic controller 60 via the communication interface 44.
  • the pressing tool 10 also has a press slide 50 which is designed to lock the lower beam 20 in the pressing position, so that the lower beam 20 remains in the pressing position during the forming process.
  • the press slide 50 is designed to be linearly movable along the arrow 4 .
  • the press slide 50 has an electric drive 52.
  • the electric drive 52 has a servo linear motor.
  • the electric drive 52 also has a communication interface 54.
  • the electric drive 52 of the press slide 50 is connected to the electronic controller 60 via the communication interface 54.
  • the communication interfaces 44 and 54 are based on the PNO's Profinet standard.
  • the electric drive of the filling slide 40 and the electric drive of the press slide 50 are linked to the electronic control 60 by the Profinet communication interfaces 44 and 54 .
  • the pressing tool 10 also has a displaceable upper beam 30 with a forming area 32, which can be displaced against the forming area 22 of the lower beam 20 in its pressing position, so that the workpiece 100 during the forming process between the forming area 22 of the lower beam 20 and the forming area 32 of the upper beam 30 can be reshaped.
  • the upper beam 30 is designed to be linearly movable along the arrow 2 .
  • figure 2 shows the pressing tool 10 from figure 1 in the pressing position.
  • the lower beam 20 was moved into the pressing position by means of the electric drive 42 of the filling slide 40 .
  • the workpiece 100 rests on the lower beam 20 .
  • the lower beam 20 is secured against being shifted back into the filling position by the press slide 50 which is connected to the lower beam 20 in a form-fitting manner.
  • figure 3 shows the pressing tool 10 from FIGS figures 1 and 2 during the forming process.
  • the forming area 32 of the upper beam 30 has been brought up to the forming area 22 of the lower beam 20 .
  • the workpiece 100 was formed between the forming area 32 of the upper beam 30 and the forming area 22 of the lower beam 20 .
  • the shape of the workpiece 100 now corresponds at least in sections to the respective contours of the forming area 22 of the upper beam 30 and the forming area 32 of the lower beam 20.
  • figure 4 shows the pressing tool 10 from FIGS Figures 1 to 3 after the forming process has taken place.
  • the upper beam 30 is back to the starting position according to the figure 1 been proceeded.
  • the press slide 50 was moved to the starting position so that the lower beam 20 was released and by means of the filling slide 40 to its starting position according to FIG figure 1 could be proceeded.
  • the finished formed workpiece 100 can now be removed.
EP21189179.1A 2020-09-22 2021-08-02 Outil de presse permettant de former une pièce et procédé de formage d'une pièce Pending EP3970877A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020211839.6A DE102020211839A1 (de) 2020-09-22 2020-09-22 Presswerkzeug zum Formen eines Werkstücks und Verfahren zum Formen eines Werkstücks

Publications (1)

Publication Number Publication Date
EP3970877A1 true EP3970877A1 (fr) 2022-03-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21189179.1A Pending EP3970877A1 (fr) 2020-09-22 2021-08-02 Outil de presse permettant de former une pièce et procédé de formage d'une pièce

Country Status (2)

Country Link
EP (1) EP3970877A1 (fr)
DE (1) DE102020211839A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1103319A1 (fr) * 1999-11-15 2001-05-30 Umix Co., Ltd. Outillage de formage pour pliage angulaire negatif
DE20305239U1 (de) 2003-04-01 2003-05-28 Boellhoff Gmbh Setzwerkzeug mit Freiraum über dem Setzkopf
US20080098792A1 (en) * 2006-10-27 2008-05-01 Nieschulz Daniel F Wedge activated rotating filler cam
DE102009037854A1 (de) 2009-08-18 2011-02-24 Erwin A. Lang Gmbh & Co. Kg Pressenwerkzeug für eine Presse zum Umformen von Teilen mit zusätzlicher Klemmfunktion, Presse und Verfahren hierfür
JP2012176432A (ja) * 2011-02-28 2012-09-13 Daihatsu Motor Co Ltd プレス成形金型
FR2995233A1 (fr) * 2012-09-10 2014-03-14 Peugeot Citroen Automobiles Sa Outil de presse pour l'emboutissage d'une tole en contre-depouille
DE202014007606U1 (de) 2014-09-24 2014-10-20 Hans Schröder Maschinenbau GmbH Schwenkbiegemaschine
FR3027828A1 (fr) * 2014-10-30 2016-05-06 Peugeot Citroen Automobiles Sa Outillage de mise a forme d’un bord en contre-depouille d’embouti
CN205253961U (zh) * 2015-12-23 2016-05-25 郑州日产汽车有限公司 冲压模具侧驱动退料机构

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD297889A7 (de) 1989-12-22 1992-01-30 Fz Fuer Umform- Und Plastverarbeitungstechnik Zwickau Gmbh,De Biegewerkzeug zur herstellung von hutprofilen
DE102008062470A1 (de) 2008-12-16 2010-06-17 Wilhelm Karmann Gmbh Presswerkzeug

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1103319A1 (fr) * 1999-11-15 2001-05-30 Umix Co., Ltd. Outillage de formage pour pliage angulaire negatif
DE20305239U1 (de) 2003-04-01 2003-05-28 Boellhoff Gmbh Setzwerkzeug mit Freiraum über dem Setzkopf
US20080098792A1 (en) * 2006-10-27 2008-05-01 Nieschulz Daniel F Wedge activated rotating filler cam
DE102009037854A1 (de) 2009-08-18 2011-02-24 Erwin A. Lang Gmbh & Co. Kg Pressenwerkzeug für eine Presse zum Umformen von Teilen mit zusätzlicher Klemmfunktion, Presse und Verfahren hierfür
JP2012176432A (ja) * 2011-02-28 2012-09-13 Daihatsu Motor Co Ltd プレス成形金型
FR2995233A1 (fr) * 2012-09-10 2014-03-14 Peugeot Citroen Automobiles Sa Outil de presse pour l'emboutissage d'une tole en contre-depouille
DE202014007606U1 (de) 2014-09-24 2014-10-20 Hans Schröder Maschinenbau GmbH Schwenkbiegemaschine
FR3027828A1 (fr) * 2014-10-30 2016-05-06 Peugeot Citroen Automobiles Sa Outillage de mise a forme d’un bord en contre-depouille d’embouti
CN205253961U (zh) * 2015-12-23 2016-05-25 郑州日产汽车有限公司 冲压模具侧驱动退料机构

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