EP0041633A2 - Presse de déformation pour la fabrication de pièces estampées - Google Patents

Presse de déformation pour la fabrication de pièces estampées Download PDF

Info

Publication number
EP0041633A2
EP0041633A2 EP81103865A EP81103865A EP0041633A2 EP 0041633 A2 EP0041633 A2 EP 0041633A2 EP 81103865 A EP81103865 A EP 81103865A EP 81103865 A EP81103865 A EP 81103865A EP 0041633 A2 EP0041633 A2 EP 0041633A2
Authority
EP
European Patent Office
Prior art keywords
forming press
lever
ejector
drive
sliding piece
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.)
Granted
Application number
EP81103865A
Other languages
German (de)
English (en)
Other versions
EP0041633A3 (en
EP0041633B1 (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 essentially consisting of an ejector pin which can be moved into the die and an actuating linkage which has an actuating lever acting on the ejector pin, one with the forming press drive in Connected drive lever and a coupling rod connecting both levers, the drive lever partially has the shape of a circular arc and the coupling rod is articulated via a sliding piece in the area of the circular arc and actuating lever and drive lever are arranged such that the center of the circular arc at maximum ejector stroke lies in the articulation point of the coupling rod 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 the pressed part pushing out of it after 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 by means of the coupling rod to the actuating lever, which 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 circular arc in the position of the maximum ejector stroke is precisely in the articulation of the coupling rod on the operating lever.
  • the sliding piece can be moves and thus the lever ratios between the coupling rod and the drive lever are changed without touching the maximum ejecting stroke. Only the length of the return stroke changes.
  • 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 bolt for the actuating lever, by an adjusting motor arranged on the drive lever for displacing the sliding piece on the circular arc, and by a motor-driven locking device for the sliding piece.
  • the ejector stroke is adjusted so 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 B-eichungsgestlinde moved until it abuts 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, the actuating linkage is then set 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 off. 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 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 hole 5 is provided, which determines the shape of the pressed part and in which the front end of an ejector 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 lies directly 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 cylinders 18, 19, the locking device 14 can be loosened 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-AS 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 arcuate section 13, i.e. 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. This is the position in which the return stroke of the ejector pin 6 is greatest due to the then given lever ratios.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Press Drives And Press Lines (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
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
DE3021790 1980-06-11
DE19803021790 DE3021790A1 (de) 1980-06-11 1980-06-11 Umformpresse zur herstellung von pressteilen

Publications (3)

Publication Number Publication Date
EP0041633A2 true EP0041633A2 (fr) 1981-12-16
EP0041633A3 EP0041633A3 (en) 1982-03-24
EP0041633B1 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) ES8300527A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161643A2 (fr) * 1984-05-18 1985-11-21 L. SCHULER GmbH Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage

Families Citing this family (2)

* 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
DE20218783U1 (de) 2002-12-03 2004-04-08 Wik Far East Ltd. Styling- und Curlinghaarbürste

Citations (4)

* 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
DE2740616B2 (de) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Umformpresse, insbesondere Mehrstufenpresse

Patent Citations (4)

* 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
DE2740616B2 (de) * 1977-09-09 1979-12-13 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Umformpresse, insbesondere Mehrstufenpresse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161643A2 (fr) * 1984-05-18 1985-11-21 L. SCHULER GmbH Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage
US4635463A (en) * 1984-05-18 1987-01-13 L. Schuler Gmbh Arrangement for the ejection of the shaped parts out of the matrix of a deformation press
EP0161643A3 (en) * 1984-05-18 1988-04-27 L. Schuler Gmbh Device for ejecting the pressed pieces from the die in a metal-forming press

Also Published As

Publication number Publication date
ES502921A0 (es) 1982-11-01
EP0041633A3 (en) 1982-03-24
ATE9204T1 (de) 1984-09-15
EP0041633B1 (fr) 1984-09-05
ES8300527A1 (es) 1982-11-01
DE3021790A1 (de) 1981-12-17
DE3165835D1 (en) 1984-10-11

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