EP2457672B1 - Amortisseur de matrice - Google Patents

Amortisseur de matrice Download PDF

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Publication number
EP2457672B1
EP2457672B1 EP11008440.7A EP11008440A EP2457672B1 EP 2457672 B1 EP2457672 B1 EP 2457672B1 EP 11008440 A EP11008440 A EP 11008440A EP 2457672 B1 EP2457672 B1 EP 2457672B1
Authority
EP
European Patent Office
Prior art keywords
wedge
die cushion
cushion device
press
frame
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.)
Not-in-force
Application number
EP11008440.7A
Other languages
German (de)
English (en)
Other versions
EP2457672A1 (fr
Inventor
Jürgen Henning
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.)
Germas AG
Original Assignee
Germas AG
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Filing date
Publication date
Application filed by Germas AG filed Critical Germas AG
Publication of EP2457672A1 publication Critical patent/EP2457672A1/fr
Application granted granted Critical
Publication of EP2457672B1 publication Critical patent/EP2457672B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/02—Die-cushions

Definitions

  • the invention relates to a die cushion device according to the preamble of the independent claim 1.
  • a die cushion device without active drive in which the holding force exerted by the pressure cheek against the press ram is generated by means of several spring assemblies.
  • the spring assemblies are arranged in the press table such that the spring force acts in the horizontal direction.
  • a wedge thruster By means of a wedge thruster, the horizontally acting spring force is deflected to the vertically movable pressure cheek of the die cushion device.
  • the holding force which is applied by the pressure cheek against the press ram is not adjustable in this device, but is defined by the spring constant of the spring assemblies used.
  • Die-cushion devices that allow control of the holding force, usually have a hydraulic drive.
  • a hydraulic drive is relatively expensive to implement and is usually only suitable for large presses or presses with high pressing pressures.
  • hydraulic drive presses and hydraulically driven die cushions are very large and therefore difficult to install, and also relatively expensive.
  • EP 1 082 185 B1 is an electrically operated deep drawing press known. Both the press ram and the die cushion device of this press are driven by four electrically operated spindle drives. This electric drive can be implemented relatively inexpensively and is particularly worthwhile for small presses. Of the Electric drive can also be controlled relatively easily and synchronously and thus allows a uniformly over the entire pressure surface generated pressing force. However, in contrast to conventional hydraulic drives electrically operated spindle drives are relatively slow, whereby the speed with which press ram or die cushion pressure cheek can be moved, is relatively limited.
  • a die cushion device is made JP 2003 211 231 A known.
  • the holding force which is applied in this device by the pressure cheek of the die cushion against the press ram of the press, is generated by a gas pressure cylinder.
  • the gas cylinder represents a closed system and is calibrated to a specific holding force. A regulation of the holding force during the press stroke of the press ram is therefore not possible.
  • the holding force is determined solely by how far the gas cylinder is pushed together during the pressing process.
  • the device comprises an adjusting mechanism for biasing the gas pressure cylinder or adjusting its vertical position relative to the vertically movable pressure cheek of the die cushion device, so that the holding force generated by the gas pressure cylinder can also be preset.
  • the adjusting mechanism comprises a wedge thrust gear, which is arranged below the gas pressure cylinder and below the pressure cheek and is driven by a hydraulic cylinder.
  • a disadvantage of this device is that the holding force acting from the pressure cheek of the die cushion device against the press ram of the press, during the pressing process can not be controlled.
  • each of the wedge thrust gear in each case comprises a first wedge, which is arranged above the vertically movable press ram and firmly connected to the frame of the press. This first wedge forms an inclined plane inclined relative to the horizontal.
  • each of the wedge thrust gears includes another wedge disposed between the first wedge and the press ram and movable with the aid of a linear electric motor along the inclined plane of the first wedge. The second wedge thus slides with its inclined top along the inclined plane of the first wedge and with its horizontally oriented bottom along the top of the press ram.
  • the second wedge is using of the electric motor between the first wedge, which is fixedly connected to the housing, and driven the press ram, so that the press ram moves in a pressing operation in the vertical direction downwards. Due to the fact that the second wedge can only have a limited length, the press ram in its lowermost position is no longer loaded uniformly but on one side by the second wedge offset relative to its starting position. For this reason, the press comprises a plurality of wedge thrust gears, which are offset from one another. For this reason and due to the large volume of construction is the off US 7,000,537 B2 known drive not suitable to be used as a drive for generating a holding force in a die cushion device that must be integrated in the most compact manner possible in the press table of a press.
  • the drive of a press ram can not be readily used in a die cushion device, since the drives of die cushion and press ram mostly different requirements are made. Press rams are usually controlled path-dependent, whereas the drive of a die cushion usually has to allow a force-dependent control.
  • the object is solved by the features of independent claim 1 of the present invention.
  • the invention is based on a die cushion device for a press, for regulating a holding force which is exerted by a pressure cheek on the press ram of the press.
  • the die cushion device further comprises a frame and a wedge thrust gear, wherein the holding force is adjustable by means of the wedge thruster.
  • the wedge thrust mechanism is driven by at least one linear electric motor, wherein the holding force during a Pressenhubs by controlling the linear electric motor is adjustable.
  • the combination of wedge thrust and linear electric motor allows rapid movement of the pressure cheek of the die cushion device, whereby the productivity of a press with a die cushion device according to the invention is in a range that otherwise can only be achieved with expensive hydraulic drives.
  • the drive with a linear electric motor allows easy control and is easy and inexpensive to implement. Since linear electric motors can muster only a limited force, the required reduction is implemented with a wedge slide.
  • a moving component is to be understood, by means of which a holding force can be exerted on the press ram of the press.
  • This component may for example be a bolt with, if necessary, attached tool.
  • the at least one linear electric motor is the only drive mode of the die cushion device for generating the holding force.
  • the drive then builds very compact and can be controlled very accurately.
  • the wedge push gear comprises a first wedge with a first wedge surface and a second wedge with a second wedge surface, wherein the pressure cheek is connected to the first wedge, the first wedge is slidably mounted in the frame in the direction of action of the holding force, and the second wedge along an adjustment direction, which has an angle to the effective direction of the holding force, is mounted displaceably in the frame.
  • the first wedge surface and the second wedge surface are facing each other, so that a movement of the second wedge in the adjustment causes a movement of the first wedge in the effective direction of the holding force.
  • the upper part of the die cushion apparatus can be kept very compact, whereby the die cushion device can be very easily integrated into the press table of a press. In terms of a compact design, it is advantageous if only a single wedge thrust gear is provided with a first wedge and a second wedge.
  • the adjustment direction is horizontal.
  • very little space in the vertical direction is required for accommodating the linear electric motor or motors. Again, this has a positive effect on the integration of the die cushion device in the press table of a press.
  • the linear electric motor comprises a stator and a rotor, wherein the stator with the frame and the rotor are connected to the second wedge.
  • the frame of the die cushion device is fixed, that is firmly connected to the housing of the press. Therefore, when the stator of the linear electric motor is connected to the frame, the wiring of the linear electric motor is also easy. There is no need to provide a flexible supply line.
  • At least one rolling guide is provided in each case between the second wedge and the frame, and between the first wedge surface and the second wedge surface.
  • sliding guides are also possible instead of rolling guides, but with rolling guides the friction is reduced and the stability and ease of movement are increased.
  • At least one rolling guide is provided between the first wedge and the frame.
  • This type of storage offers compared to pure guide surfaces or against sliding guides o.g. Advantages.
  • the die cushion apparatus further comprises a control of the linear electric motor.
  • the die cushion device further comprises a path measuring system for detecting the position of the pressure cheek.
  • the displacement measuring system can be realized for example by a clock and a sensor. Both magnetic and optical or inductive sensors are suitable.
  • the sensor is fixed to the frame, whereby the wiring of the sensor is simple and does not have to be designed flexibly.
  • the clock which is scanned by the sensor, may be mounted on the pressure cheek itself or on the first wedge or possibly also on the second wedge. In the latter case, the Position of the pressure cheek calculated using the reduction ratio of the wedge push gear.
  • a sensor or displacement measuring system and the linear electric motor itself can be used as a so-called integrated sensor.
  • the die cushion apparatus further comprises a pressure sensor for detecting the holding force.
  • a pressure sensor allows a force-dependent control of the die cushion device. This sensor can be integrated in the pressure cheek, for example in a pin of the pressure cheek or in an attached tool.
  • the invention also provides a press with a press table, a press ram, and a die cushion apparatus according to the invention in which the frame of the die cushion apparatus is integrated with and connected to the press table.
  • the frame of the die cushion device can be both fixedly connected to the press table and, for example, in the horizontal direction, adjustable.
  • FIG. 1 shows a front view of a press 2 with a die cushion device according to the invention 1.
  • the press 2 comprises a press table 23 and a press ram 3, which is movable relative to the press table 23 in the vertical direction by means of the threaded spindles 24.
  • Each threaded spindle 24 is assigned a spindle drive 25 for this purpose.
  • the press table 23 is shown partially cut so that the die cushion device 1 integrated in the press table 23 is visible.
  • the frame 4 of the invention is shown partially cut so that the die cushion device 1 integrated in the press table 23 is visible.
  • Cushioning device 1 is connected to the press table 23.
  • the wedge thrust gear 5 of the die cushion device 1 which forms the drive of the existing of the bolt 7 and the tool 8 pressure cheek.
  • the bolt 7 can be moved in the vertical direction with the help of the wedge thruster 5 and protrudes in the case shown from the top of the press table 23 also. Between the patch on the bolt 7 tool 8 and the press ram 3, a sheet is clamped in a deep drawing process.
  • FIG. 1 illustrated die cushion device 1 is slightly larger in FIG. 2 shown.
  • the view corresponds to a section along the in FIG. 3 drawn section line 11.
  • FIG. 3 turn is a cut along in FIG. 2 illustrated section line III.
  • the bolt 7 is in the frame 4 of the die cushion device 1 in the vertical direction, which corresponds to the effective direction 13 of the bolt 7 applied to the press ram 3 holding force, out.
  • the patch on the bolt 7 tool 8 is in the Figures 2 and 3 not shown. It should also be noted that the FIGS. 1 to 3 only represent schematic representations of the die cushion device according to the invention.
  • the first wedge 9 is the same as the bolt 7 in the vertical direction 13 in the frame 4 out. Shown are only lateral guide surfaces, but also rolling bearings or plain bearings between the frame 4 and the first wedge 9 may be provided.
  • the underside of the first wedge 9, hereinafter referred to as the first wedge surface lies in an inclined plane which has an angle of approximately 5 ° relative to the horizontal. The reduction ratio of the wedge thruster 5 is determined by this angle. This angle is preferably in a range between 3 ° and 8 °.
  • the first wedge surface is designated by the reference numeral 11.
  • a second wedge 10 is arranged, which is mounted in the horizontal adjustment 14 movable in the frame 4.
  • two Wälz exchangeen 17 are arranged between the horizontally oriented bottom of the second wedge 10 and the bottom plate 26 of the frame 4.
  • the upper side 12 of the second wedge 10 hereinafter referred to as the second wedge surface, runs parallel to the first wedge surface 11 of the first wedge 9.
  • two rolling guides 18 are likewise arranged.
  • the second wedge 10 serve two linear electric motors 6, which, as in FIG. 3 are arranged on both sides of the second wedge 10 between the frame 4 and the wedge 10.
  • the stators 15 of the two linear electric motors 6 are firmly connected to the frame 4, the rotor 16 of the two motors are mounted on the wedge 10.
  • the die-cushion device 1 further comprises a controller 19, with which the two linear electric motors 6 are driven.
  • the controller 19 allows both a path-dependent and a force-dependent control of the die cushion device.
  • the controller 19 must be able to detect the position of the bolt 7 and the position of the first wedge 9.
  • a timing ruler 20 is attached to the bolt 7, which is scanned via the sensor 21.
  • the system also allows a force-dependent control, in which case the force acting between the bolt 7 and the press ram 3 must be measured.
  • the die-cushion device 1 comprises a pressure sensor 22 which is integrated in the bolt 7. The signals of the sensors 21 and 22 are read out by the controller 19 and evaluated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (10)

  1. Dispositif de coussin serre-flan d'emboutissage (1) pour une presse (2), destiné à la régulation d'une force de maintien, qui est exercée par une joue de pression sur le coulisseau de presse (3) de la presse (2), le dispositif de coussin serre-flan d'emboutissage (1) comprenant par ailleurs, outre la joue de pression, un châssis (4) et une transmission de poussée à patins en coin (5), et la force de maintien étant réglable au moyen de la transmission de poussée à patins en coin (5),
    caractérisé en ce que la transmission de poussée à patins en coin (5) est entraînée par au moins un moteur électrique linéaire (6), la force de maintien pouvant être régulée pendant une course de travail de la presse, par commande du moteur électrique linéaire (6).
  2. Dispositif de coussin serre-flan d'emboutissage (1) selon la revendication 1, caractérisé en ce que ledit au moins un moteur électrique linéaire (6) constitue le seul mode d'entraînement du dispositif de coussin serre-flan d'emboutissage (1), pour produire la force de maintien.
  3. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 1 ou 2, caractérisé en ce que la transmission de poussée à patins en coin (5) comprend un premier patin en coin (9) avec une première surface en coin (11), et un deuxième patin en coin (10) avec une deuxième surface en coin (12), la joue de pression est reliée au premier patin en coin (9), le premier patin en coin (9) est monté dans le châssis (4) de manière à pouvoir coulisser dans la direction d'action de la force de maintien, et le deuxième patin en coin (10) est monté dans le châssis (4) de manière à pouvoir coulisser le long d'une direction de réglage qui forme un angle par rapport à la direction d'action de la force de maintien, la première surface en coin (11) et la deuxième surface en coin (12) étant dirigées l'une vers l'autre de manière à ce qu'un mouvement du deuxième patin en coin (10) dans la direction de réglage, produise un mouvement du premier patin en coin (9) dans la direction d'action de la force de maintien.
  4. Dispositif de coussin serre-flan d'emboutissage (1) selon la revendication 3, caractérisé en ce que le moteur électrique linéaire (6) comprend un stator (15) et un induit (16), le stator (15) étant relié au châssis (4) et l'induit (16) au deuxième patin en coin (10).
  5. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 3 à 4, caractérisé en ce qu'il est prévu respectivement au moins un guidage à roulement (17, 18) entre le deuxième patin en coin (10) et le châssis (4), et entre la première surface de coin (11) et la deuxième surface de coin (12).
  6. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 3 à 5, caractérisé en ce qu'il est prévu au moins un guidage à roulement entre le premier patin en coin (9) et le châssis (4).
  7. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif de coussin serre-flan d'emboutissage (1) comporte une commande (19) du moteur électrique linéaire (6).
  8. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de coussin serre-flan d'emboutissage (1) comporte, par ailleurs, un système de mesure de déplacement (20, 21) pour relever la position de la joue de pression.
  9. Dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 1 à 8, caractérisé en ce que le dispositif de coussin serre-flan d'emboutissage (1) comporte, par ailleurs, un capteur de pression (22) pour relever la force de maintien.
  10. Presse (2) comportant une table de presse (23) et un coulisseau de presse (3), caractérisée en ce que la presse (2) comprend un dispositif de coussin serre-flan d'emboutissage (1) selon l'une des revendications 1 à 9, le châssis (4) du dispositif de coussin serre-flan d'emboutissage (1) étant intégré dans la table de presse (23) et relié à celle-ci.
EP11008440.7A 2010-11-19 2011-10-20 Amortisseur de matrice Not-in-force EP2457672B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010051958A DE102010051958A1 (de) 2010-11-19 2010-11-19 Ziehkissen-Vorrichtung

Publications (2)

Publication Number Publication Date
EP2457672A1 EP2457672A1 (fr) 2012-05-30
EP2457672B1 true EP2457672B1 (fr) 2015-07-08

Family

ID=44862326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11008440.7A Not-in-force EP2457672B1 (fr) 2010-11-19 2011-10-20 Amortisseur de matrice

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EP (1) EP2457672B1 (fr)
DE (1) DE102010051958A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103212631A (zh) * 2013-04-02 2013-07-24 顺德工业(江苏)有限公司 冲压模具内的变形补正机构
DE102015116039A1 (de) * 2015-09-23 2017-03-23 Schuler Pressen Gmbh Druckstift für eine Presse zum Umformen eines Werkstückes, Presse zum Umformen eines Werkstückes, Verfahren zum Einarbeiten und Einstellen einer Presse beim Umformen, Verfahren zum Fertigen eines Bauteils und Bauteil
CN112872536B (zh) * 2021-01-19 2023-01-24 苏州长光华芯光电技术股份有限公司 激光芯片的辅助焊接装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2007724A1 (en) 1970-02-19 1971-09-02 Philips Patentverwaltung GmbH 2000 Hamburg Spring loaded floor for bending press tool
DE19821159A1 (de) 1998-05-12 1999-11-25 Johannes Huelshorst Tiefziehpresse
WO2002090096A1 (fr) 2001-04-26 2002-11-14 Sodick Co., Ltd. Presse et machine-outil
JP2003211231A (ja) 2002-01-18 2003-07-29 Sanyo Electric Co Ltd プレス金型のシワ押え圧力調整機構
JP4112577B2 (ja) * 2005-07-05 2008-07-02 ファナック株式会社 ダイクッション機構並びにその制御装置及び制御方法
DE102006034201A1 (de) * 2006-07-24 2008-02-07 Siemens Ag Presse
JP4595017B2 (ja) * 2009-02-16 2010-12-08 ファナック株式会社 サーボダイクッションの制御装置

Also Published As

Publication number Publication date
DE102010051958A1 (de) 2012-05-24
EP2457672A1 (fr) 2012-05-30

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