EP0041633B1 - Presse de déformation pour la fabrication de pièces estampées - Google Patents

Presse de déformation pour la fabrication de pièces estampées Download PDF

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Publication number
EP0041633B1
EP0041633B1 EP81103865A EP81103865A EP0041633B1 EP 0041633 B1 EP0041633 B1 EP 0041633B1 EP 81103865 A EP81103865 A EP 81103865A EP 81103865 A EP81103865 A EP 81103865A EP 0041633 B1 EP0041633 B1 EP 0041633B1
Authority
EP
European Patent Office
Prior art keywords
metal
forming press
ejector
lever
driving lever
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
Application number
EP81103865A
Other languages
German (de)
English (en)
Other versions
EP0041633A3 (en
EP0041633A2 (fr
Inventor
Walter Flamme
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.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
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 L Schuler GmbH filed Critical L Schuler GmbH
Priority to AT81103865T priority Critical patent/ATE9204T1/de
Publication of EP0041633A2 publication Critical patent/EP0041633A2/fr
Publication of EP0041633A3 publication Critical patent/EP0041633A3/de
Application granted granted Critical
Publication of EP0041633B1 publication Critical patent/EP0041633B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices

Definitions

  • the invention relates to a forming press for the production of pressed parts with at least one ejector device for ejecting the pressed parts from a die, the ejector device as main components having an ejector pin which can be moved into the die and an actuating linkage which has an actuating lever acting on the ejector pin and one connected to the forming press drive has a stationary drive lever and a coupling rod connecting both levers, the drive lever partially having the shape of a circular arc and the coupling rod being articulated via a sliding piece in the region of the circular arc, and actuating lever and drive lever being arranged in such a way that the center point of the circular arc in the maximum ejector stroke The articulation point of the coupling rod is on the operating lever.
  • Ejector devices in forming presses serve to limit the depth of penetration of the pressed part during the pressing in the die and to push the pressed part out of it after the pressing.
  • a reciprocating ejector pin is provided, the movement of which is controlled by an actuating linkage.
  • this actuating linkage consists essentially of an actuating lever designed as an angle lever for the ejector pin, a coupling rod articulated on the actuating lever and a drive lever connected to the coupling rod.
  • This drive lever runs on a cam driven by the press drive and is pivoted back and forth in this way. This pivoting movement is transmitted to the actuating lever by means of the coupling rod, which correspondingly pushes the ejector pin back and forth in time with the forming press.
  • the stroke of the ejector pin In order to change the depth of penetration in the die for different pressed parts, the stroke of the ejector pin must be adjustable in such a way that the position of the maximum ejector stroke remains the same and only the maximum return stroke changes.
  • the connection between the coupling rod and the drive lever is designed so that the lever ratios can be varied.
  • the shift takes place via a sliding piece along an arcuate section of the drive lever.
  • Drive lever and operating lever are arranged so that the center of the arc in the position of the maximum ejector stroke is exactly in the articulation of the coupling rod on the operating lever. In this way, the sliding piece can be moved and thus the lever ratios between the coupling rod and the drive lever can be changed without touching the maximum ejector stroke position. Only the length of the return stroke changes.
  • An embodiment of a forming press in which the ejector of the ejector device can be adjusted manually by means of a hand wheel is also known from CH-A-532436. From this, a motorized adjustment drive is also known, by means of which a crosshead participating in the strokes of the tappet via pull rods can be adjusted in its position relative to the tappet. This adjustment thus only indirectly affects the throwing device.
  • the invention has for its object to reduce the time and manpower for adjusting the ejector stroke in forming presses of the type mentioned.
  • a forming press which, according to the invention, is characterized by a motor-adjustable stop pin for the actuating lever, by an adjusting motor arranged on the drive lever for displacing the sliding pieces on the circular arc and by a motor-driven locking device for the sliding piece.
  • the adjustment of the ejector stroke takes place in such a way that the actuating linkage is first brought into the maximum ejector stroke position. Then the locking device for the sliding piece is released and the sliding piece is moved by means of the adjusting motor into the position which results in a maximum return stroke for the ejector pin. The locking device is then fixed again.
  • the stop pin which limits the maximum return stroke and against which the ejector pin can be supported during pressing, is brought into the desired position by a motor. Then the actuating linkage is moved until it rests on the stop pin. If the latter is not in the maximum return stroke position, the drive lever remains raised from its drive, for example a cam disk. In order to bring it back to the system there, the sliding piece is moved by means of the adjusting motor after the locking device has been released again until the drive lever on the drive comes to the system. After fixing the sliding piece is the actuation linkage adjusted to the new ejector stroke.
  • a lifting device for displacing the ejector pin into the position of maximum ejector stroke acts on the actuating linkage.
  • This lifting device takes over the lifting of the drive lever from the drive to the maximum ejector position. An actuation of the forming press drive is then no longer necessary.
  • the lifting device is expediently articulated on the drive lever.
  • it can be designed as a pneumatic pressure cylinder.
  • the invention further provides that the adjusting motor is designed as a pressure cylinder articulated at one end on the drive lever and at the other end on the sliding piece and can thus ensure a displacement of the sliding piece.
  • the adjustment motor can be designed as a hydraulic pressure cylinder.
  • the locking device has a clamping wedge for clamping the sliding piece on the drive lever.
  • the clamping wedge can be detachable or fixable by means of at least one hydraulic cylinder.
  • two hydraulic cylinders are expediently provided for this.
  • a proximity switch is provided which switches off the adjusting motor when the drive lever is in contact with the drive, the drive advantageously being effected via a cam disk. In this way it is ensured that, after the adjustment has been made, there is contact with the cam disk.
  • Figures 1 and 2 represent a sectional view through the machine frame 1 of a forming press.
  • a die 2 is used, which consists of a die sleeve 3 and a core part 4.
  • a through bore 5 is provided, which determines the shape of the pressed part and in which the front end of an evaluation pin 6 is guided.
  • This ejector pin 6 is guided telescopically with its rear part and rests with its back against an actuating lever 7 designed as a toggle lever.
  • the actuating lever 7 has an overload safety device 8, on which the ejector pin 6 is in direct contact and which is fixed at one end by a retaining pin 9 and at the other end by a tear screw 10, which breaks at a certain critical load and thus the entire drive for the ejector pin 6 against overload protects.
  • the actuating lever 7 is connected in an articulated manner to a drive lever 12 via a coupling rod 11.
  • This drive lever 12 has a circular section 13 on which the articulation of the coupling rod 11, which is designed as a sliding piece 14, can be displaced.
  • the sliding piece 14 comprises the drive lever 12 and has a locking device 15 which consists of a clamping piece 16 movable vertically to the drive lever 12, a clamping wedge 17 with pressure cylinders 18, 19 arranged on both sides thereof. Depending on the pressurization of one or the other pressure cylinder 18, 19, the locking device 14 can be released or fixed by moving the clamping wedge 17.
  • the sliding piece 14 is displaced by means of a two-stage pressure cylinder 20, which is articulated on one side on the sliding piece 14 and on the other side on a lever arm 21 of the drive lever 12.
  • the drive lever 12 has a roller 22 at its straight end, which runs on a cam disk 23, which in turn is connected to the press drive.
  • a pneumatic cylinder 24 also acts on the drive lever 12, the other end of which is articulated on the machine frame 1. With this pneumatic cylinder 24, the drive lever 12 can be lifted off the cam disk 23 until the ejector pin 6 has reached the maximum ejector stroke position.
  • a stop pin 25 which is arranged coaxially with the ejector pin 6 and which is adjustable in the axial direction.
  • a spindle drive 26 is provided, as is known in detail from DE-B2-27 40 616, so that its detailed description is omitted here.
  • the drive lever 12 then assumes a position in which the coupling rod 11 is perpendicular to the circular section 13, i. H. the articulation point of the coupling rod 11 on the actuating lever 7 forms the center point for the circular arc of the section 13.
  • the sliding piece 14 can now be moved on the section 13 without changing anything in the position of the ejector pin 6. This is done by means of the pressure cylinder 20 after loosening the clamping wedge 17, the sliding piece 14 first being moved into the outermost position at the free end of the section 13. It is the position in which due to the then given lever ratios, the return stroke of the ejector pin 6 is greatest.
  • the stop pin 25, which limits the return stroke, can be brought into the desired position by means of the spindle drive 26. Then the pneumatic cylinder 24 is again acted upon in the opposite direction, so that the drive lever 12 with its roller 22 pivots again in the direction of the cam disk 23. As a result, the drive lever 7 also pivots back, namely until its back abuts the stop pin 25. The ejector pin 6 then also goes back.
  • the roller 22 on the drive lever 12 does not come into contact with the cam disk 23, since the sliding piece 14 is in its outermost position.
  • the locking device 15 is then released and the sliding piece 14 is displaced by means of the pressure cylinder 20 in the direction of the bearing point of the drive lever 12, the drive lever 12 pivoting with the roller 22 in the direction of the cam disk 23 due to the then changing lever ratios, while the actuating lever 7 remains in its contact position on the stop pin 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Press Drives And Press Lines (AREA)

Claims (11)

1. Presse à former, sans enlèvement de copeaux, par exemple estamper, emboutir... (ci-après simplement dénommée presse à former), pour la fabrication de pièces estampées, embouties..., comportant au moins un dispositif éjecteur pour éjecter d'une matrice (2) les pièces obtenues à la presse, étant précisé que le dispositif éjecteur présente comme composants principaux un éjecteur (6) qui peut pénétrer dans la matrice (2) et une tringlerie de manoeuvre qui comprend un levier de manoeuvre (7) qui agit sur l'éjecteur (6), un levier d'entraînement (12), en liaison avec le mécanisme d'entraînement de la presse à former, et une bielle (11) reliant les deux leviers (7, 12), étant précisé que le levier d'entraînement (12) a partiellement l'allure d'un arc de cercle (13) et que la bielle (11) est articulée, par l'intermédiaire d'un coulisseau (14), dans la zone de l'arc de cercle (13), étant également précisé que le levier de manoeuvre (7) et le levier d'entraînement (12) sont disposés de façon que, lorsque l'éjecteur est réglé à sa course maxima, le centre de l'arc de cercle (13) se trouve au point d'articulation de la bielle (11) sur le levier de manoeuvre (7), caractérisée par une butée (25), à réglage motorisé, pour le levier de manoeuvre (7), par un moteur de réglage (20), disposé sur le levier d'entraînement (12), pour faire coulisser le coulisseau (14) sur l'arc de cercle (13) et par un dispositif de blocage (15) motorisé pour le coulisseau (14).
2. Presse à former selon la revendication 1, caractérisée en ce qu'un dispositif de levage (24) attaque la tringlerie de manoeuvre (7, 11, 12) pour faire coulisser l'éjecteur (6) dans sa position de course d'éjection maxima.
3. Presse à former selon la revendication 2, caractérisé en ce que le dispositif de levage (24) est articulé au levier d'entraînement (12).
4. Presse à former selon la revendication 3, caractérisée en ce que le dispositif de levage est conçu comme vérin pneumatique (24).
5. Presse à former selon l'une des revendications 1 à 4, caractérisée en ce que le moteur de réglage est conçu comme vérin (20) articulé à une extrémité au levier d'entraînement (12) et à l'autre extrémité au coulisseau (14).
6. Presse à former selon la revendication 5, caractérisée en ce que le moteur de réglage est conçu comme vérin hydraulique (20).
7. Presse à former selon l'une des revendications 1 à 6, caractérisée en ce que le dispositif de blocage (15) comporte un coin de bridage (17) pour brider le coulisseau (14) sur le levier d'entraînement (12).
8. Presse à former selon la revendication 7, caractérisée en ce que le coin de bridage (17) peut être débloqué ou bloqué au moyen d'au moins un vérin hydraulique (18, 19).
9. Presse à former selon la revendication 8, caractérisée en ce que le coin de bridage (17) peut être débloqué ou bloqué au moyen de deux vérins hydrauliques (18, 19)
10. Presse à former selon l'une des revendications 1 à 9, caractérisée par un contacteur de proximité (27) qui stoppe le moteur de réglage (20) lorsque le levier d'entraînement (12) vient buter contre l'entraînement (23).
11. Presse à former selon la revendication 10, caractérisée en ce que l'entraînement se fait par l'intermédiaire d'une came (23).
EP81103865A 1980-06-11 1981-05-20 Presse de déformation pour la fabrication de pièces estampées Expired EP0041633B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103865T ATE9204T1 (de) 1980-06-11 1981-05-20 Umformpresse zur herstellung von pressteilen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803021790 DE3021790A1 (de) 1980-06-11 1980-06-11 Umformpresse zur herstellung von pressteilen
DE3021790 1980-06-11

Publications (3)

Publication Number Publication Date
EP0041633A2 EP0041633A2 (fr) 1981-12-16
EP0041633A3 EP0041633A3 (en) 1982-03-24
EP0041633B1 true EP0041633B1 (fr) 1984-09-05

Family

ID=6104287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103865A Expired EP0041633B1 (fr) 1980-06-11 1981-05-20 Presse de déformation pour la fabrication de pièces estampées

Country Status (4)

Country Link
EP (1) EP0041633B1 (fr)
AT (1) ATE9204T1 (fr)
DE (2) DE3021790A1 (fr)
ES (1) ES502921A0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703238A1 (de) * 1987-02-04 1988-08-18 Kieserling & Albrecht Verstelleinrichtung fuer einen ausstosser an pressen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3418508A1 (de) * 1984-05-18 1985-11-21 L. Schuler GmbH, 7320 Göppingen Einrichtung zum auswerfen der formteile aus der matrize in einer umformpresse
DE20218783U1 (de) 2002-12-03 2004-04-08 Wik Far East Ltd. Styling- und Curlinghaarbürste

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740616B2 (de) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Umformpresse, insbesondere Mehrstufenpresse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1627684B1 (de) * 1967-11-09 1970-08-27 Kieserling & Albrecht Ausstosserantrieb an Pressen, insbesondere Kaltfliesspressen für die Herstellung von im Verhältnis zum Durchmesser langen Werkstücken
AT300520B (de) * 1970-06-11 1972-07-25 Nedschroef Octrooi Maats Presse zum Stauchen von Schraubenbolzen u.dgl.
CH532436A (de) * 1971-07-06 1973-01-15 Kieserling & Albrecht Ausstossvorrichtung an Presse, insbesondere Kaltfliesspresse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740616B2 (de) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Umformpresse, insbesondere Mehrstufenpresse

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3703238A1 (de) * 1987-02-04 1988-08-18 Kieserling & Albrecht Verstelleinrichtung fuer einen ausstosser an pressen

Also Published As

Publication number Publication date
DE3165835D1 (en) 1984-10-11
ATE9204T1 (de) 1984-09-15
EP0041633A3 (en) 1982-03-24
ES8300527A1 (es) 1982-11-01
ES502921A0 (es) 1982-11-01
DE3021790A1 (de) 1981-12-17
EP0041633A2 (fr) 1981-12-16

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