EP0241571B1 - Mécanisme d'éjection au côté poinçon dans une presse - Google Patents

Mécanisme d'éjection au côté poinçon dans une presse Download PDF

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Publication number
EP0241571B1
EP0241571B1 EP19860105266 EP86105266A EP0241571B1 EP 0241571 B1 EP0241571 B1 EP 0241571B1 EP 19860105266 EP19860105266 EP 19860105266 EP 86105266 A EP86105266 A EP 86105266A EP 0241571 B1 EP0241571 B1 EP 0241571B1
Authority
EP
European Patent Office
Prior art keywords
ram
cam
ejector
press
ejector mechanism
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
EP19860105266
Other languages
German (de)
English (en)
Other versions
EP0241571A1 (fr
Inventor
Hugo Dipl.-Ing. Junklewitz
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.)
TH Kieserling and Albrecht GmbH and Co
Original Assignee
TH Kieserling and Albrecht GmbH and Co
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 TH Kieserling and Albrecht GmbH and Co filed Critical TH Kieserling and Albrecht GmbH and Co
Priority to EP19860105266 priority Critical patent/EP0241571B1/fr
Priority to DE8686105266T priority patent/DE3666548D1/de
Publication of EP0241571A1 publication Critical patent/EP0241571A1/fr
Application granted granted Critical
Publication of EP0241571B1 publication Critical patent/EP0241571B1/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 the ejector mechanism on the stamp side. the preamble of claim 1.
  • the task is to eject the blank formed in the stamping tools from the stamping tools. This is done by means of an ejector pin which, in the rest position in the base of the receptacle for the stamping tool, is flush with the axial support surface of the same in the press slide.
  • the difficulty is in precisely controlling the movement of the ejector pin when the movable press slide is returned.
  • the movement characteristic of the punch-side ejector is also dependent on the workpiece, so that it must be possible to change it when changing over.
  • a ram-side ejector mechanism on a multi-stage press with a press frame, press slide, connecting rod and crankshaft which actuates the ram-side ejector pin with a lever that engages behind it and is articulated on the press slide.
  • the lever is operated by a roller that makes a turn.
  • the curve is disc-shaped and articulated on the press slide. It is rotatably driven back and forth by a coupling, the coupling being articulated on an eye which projects from the connecting rod of the crank mechanism of the press.
  • the roller conveyor of the curve has three areas, a first, circular one, in which there is no stroke of the ejector pin, a second tangential area, which is responsible for the stroke of the ejector pin, and one third area that breaks off the stroke, that is to say on the cam disk it runs inward again towards the pivot point.
  • the second area, the straight line is formed in two parts, the two parts moving into one another like a fan or comb, as in a length compensation piece known from bridge construction.
  • the rear section of the straight line and the third section of the roller conveyor fleeing inward can be adjusted and clamped in the tangential direction relative to the cam disk. With this solution, the stroke length is adjusted.
  • the invention is therefore based on the object of creating an adjustment possibility for the characteristics of the punch-side ejector pin, which allows a quick and automatable change and which ensures a precise movement of the ejector pin.
  • this object is achieved by the characterizing features of claim 1.
  • the curve for controlling the ejector pin is not changed in its course, but replaced with a curve with a different roller conveyor.
  • a separate curve is provided on the press slide for the different ejector strokes in question. If the total number of curves required is greater than the number of curves that can be stored on a carrier, the complete cam carrier can be exchanged for another cam carrier in a few simple steps.
  • the coupling according to claim 5 is yoke-like or ladder-like, wherein on one of the crossbars of the yoke the roller rolling over the curve in the operating position is arranged, while the two side tie rods connect the extended roller axis and the ejector lever for the individual pressing stages .
  • the axis of rotation of the cam carrier lies in a longitudinal sectional plane of the press.
  • the axis of rotation of the turret is arranged at right angles to the press slide movement in a vertical longitudinal sectional plane of the press.
  • the curve in the working position is then located in the same plane, over which the roller for actuating the ejector pin is moved.
  • the curve in the working position runs approximately in the direction of a surface line of the cam carrier designed as a revolver. It is an elongated, finite piece of curve over which the roll is moved back and forth.
  • the curve in the working position lies in the same longitudinal sectional plane as the pivoting movement of the connecting rod. It is therefore intended to use a rocker arm articulated on the connecting rod as the drive element for the movement of the roller over the curve, which moves the yoke-like coupling with the roller along the curve, in order to allow the connecting rod to move back and forth relative to the slide for the same Longitudinal section plane to use required back and forth movement of the paddock.
  • the curve carrier is to be actuated by a changing device for automating the change of curve.
  • the turret-shaped cam carrier is pivoted about its axis by the changing device to such an extent that the required curve comes into the working position.
  • the pivoting should preferably be carried out by a working cylinder, which according to.
  • Claim 7 is connected to a rack, which engages in a gear on the cam carrier. By moving the piston and the rack attached to it, the different curves are brought into the working position.
  • the design of the changing device allows two defined swivel positions of the revolver in the end positions of the piston in the cylinder.
  • FIG. 1 shows a crank press of the horizontal type with a press frame 1, a press slide 2, a connecting rod 3 and a crankshaft 4.
  • the press slide has a receiving bore 29 for a stamping tool, which is opposite a receiving bore 28 on the die side of the frame 1.
  • an ejector pin 5 is provided centrally, which is guided in the press slide and which opens into a shaft 31 in the press slide 2.
  • the ejector pin is supported by a spring 27 against the press slide 2 and thus pre-tensions the entire ejector mechanism.
  • the ejector lever 6 is articulated by a horizontal axis 17 to a coupling 11 which extends essentially in the horizontal direction and overlaps the press slide 2.
  • the coupling 11 is designed like a ladder, lies flat on the press slide and has two tie rods 20, 21 which are connected to one another by a web 22.
  • An axis 19 extends parallel to the web 22 and is mounted in both tie rods 20, 21 and carries a rotatably mounted roller 7 in its longitudinal center.
  • the press has a total of three forming stages, each of which is assigned an ejector lever 6, 36, 37 on the stamp side. All levers are articulated on the axis 17.
  • the web 22, the tie rods 20, 21 and the axis 19 enclose a rotatable cam carrier 10 which has a plurality of curves 8, 9.
  • the cam carrier is designed like a revolver and rotatably arranged on the top of the press slide 2. It has a vertical axis of rotation 34. Curves 8, 9 run along surface lines of the revolver.
  • the roller 7 rolls on the curve 8 in the working position.
  • the working position is on the side of the cam carrier 10 facing the roller 7 and facing away from the ejector levers 6, 36, 37.
  • the cam carrier 10 can be pivoted about its axis of rotation 34.
  • a swivel device 35 is used for pivoting, by means of which the different curves 8, 9 and 18 are brought into the working position.
  • the changing device 35 is arranged above the press slide 2 and the cam carrier 10. It is located essentially on the side of the cam carrier 10 facing away from the tools. It comprises a gear 13 which is arranged on the top of the cam concentrically to the axis of rotation 34 of the cam carrier and a rack 14 which meshes with the gear 13.
  • the rack 14 With the rack 14, the extended piston rod 26 of a cylinder 15 is connected, which penetrates a stop box 38 and leads into the cylinder 15 arranged behind the stop box 38.
  • the rack is arranged in an extension of the piston rod.
  • a collar 25 with projecting end faces is arranged on the extended piston rod, which moves with the piston rod and moves against the stops 16, 23, 24 or against the walls of the stop box.
  • Each of the stops is designed to be movable, it can be pulled out of the path of the federal government and, in the retracted position, provides a further distance for the piston rod 26 with the federal government 25.
  • the stops are moved with the help of cylinders 39, 40, 41.
  • the number of movable stops corresponds to the number of curves on the cam bracket minus two.
  • a rocker 12 engages next to the coupling 11 and is connected to the connecting rod 3 via a joint 42.
  • the connecting rod 3 makes a nodding movement relative to the press slide 2, which is used with the aid of the rocker 12 to guide the roller 7 over the curve 8.
  • the coupling 11 moves in accordance with the course of the curve 8. This reciprocating movement is transmitted to the lever 6, which actuates the ejector pin 5 accordingly.
  • the cam carrier has a peripheral region with the cam tracks and an opposite region 30, which is circular and preferably cylindrical.
  • a shell-like support molded onto the slide is assigned to the area 30, which supports the area 30 at least half the length of the cam bracket and avoids any significant suspension of the cam bracket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Claims (9)

1. Mécanisme d'expulsion côté poinçon monté dans une presse comportant un cadre de presse (1), un chariot de presse (2) une bielle (3) et une manivelle (4) et présentant les particularités suivantes:
a) une cheville d'expulsion (5) guidée dans le chariot de presse (2),
b) un levier (6) qui s'articule sur le chariot de presse (5) et s'engage derrière la cheville d'expulsion (5),
c) le levier (6) étant relié à un rouleau (7) qui roule sur une courbe (8) ménagée sur le chariot de presse (2) et,
d) le chemin de roulement du rouleau étant réglable, caractérisé par les particularités suivantes:
e) au moins une courbe supplémentaire (9) située sur un support (10) qui lui est commun avec la première courbe (8),
f) les courbes (8, 9) étant, pendant le fonctionnement de la presse, immobiles par rapport au chariot de presse (2),
g) les courbes (8, 9) étant utilisées alternativement et,
h) les courbes ayant des tracés différents.
2. Mécanisme d'expulsion côté poinçon selon la revendication 1, caractérisé par la particularité suivante:
i) le support de courbes (10) a une forme telle que qu'il peut se déplacer sur le chariot de presse (2).
3. Mécanisme d'expulsion côté poinçon selon l'une des revendications 1 ou 2, caractérisé par la particularité suivante:
j) le support de courbes (10) a la forme d'un tambour revolver et est monté de manière à pouvoir tourner.
4. Mécanisme d'expulsion côté poinçon selon la revendication 1, caractérisé par la particularité suivante:
k) le levier d'expulsion (6) est relié par une articulation à une pièce d'accouplement (11) qui porte le rouleau (7) qui se déplace contre la courbe (8).
5. Mécanisme d'expulsion côté poinçon selon la revendication 4, caractérisé par la particularité suivante:
I) la pièce d'accouplement (11) a la forme d'une échelle et renferme le support rotatif (10) des courbes.
6. Mécanisme d'expulsion côté poinçon selon les revendications 1 et 2, caractérisé par la particularité suivante:
m) un dispositif de remplacement du support (10) des courbes (8, 9).
7. Mécanisme d'expulsion côté poinçon selon la revendication 6, caractérisé par la particularité suivante:
n) le support pivotant (10) des courbes comporte un pignon ou segment denté (13) qui est en prise avec une crémaillère (14) qui est déplacée par un vérin (15) monté sur le chariot de presse.
8. Mécanisme d'expulsion côté poinçon selon la revendication 6 comportant plus de deux courbes et caractérisé par la particularité suivante:
o) au moins une butée mobile (16) pouvant être déplacée sur le trajet de la crémaillère (14).
9. Mécanisme d'expulsion côté poinçon selon la revendication 3 comportant plus de deux courbes, caractérisé par la particularité suivante:
p) le support de courbes prend appui sur le chariot de presse du côté du support de courbes (10) opposé à la courbe qui est en position de travail à la hauteur de la courbe. rte on é s
EP19860105266 1986-04-16 1986-04-16 Mécanisme d'éjection au côté poinçon dans une presse Expired EP0241571B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19860105266 EP0241571B1 (fr) 1986-04-16 1986-04-16 Mécanisme d'éjection au côté poinçon dans une presse
DE8686105266T DE3666548D1 (en) 1986-04-16 1986-04-16 Ejector mechanism on the punch-side in a press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860105266 EP0241571B1 (fr) 1986-04-16 1986-04-16 Mécanisme d'éjection au côté poinçon dans une presse

Publications (2)

Publication Number Publication Date
EP0241571A1 EP0241571A1 (fr) 1987-10-21
EP0241571B1 true EP0241571B1 (fr) 1989-10-25

Family

ID=8195065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860105266 Expired EP0241571B1 (fr) 1986-04-16 1986-04-16 Mécanisme d'éjection au côté poinçon dans une presse

Country Status (2)

Country Link
EP (1) EP0241571B1 (fr)
DE (1) DE3666548D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3904278A1 (de) * 1989-02-14 1990-08-16 Schuler Gmbh L Antrieb fuer einen in einem stoessel einer mechanischen umformpresse verschieblich gelagerten, patrizenseitigen auswerfer
DE3911921A1 (de) * 1989-04-12 1990-10-18 Schuler Gmbh L Antrieb fuer einen in einem stoessel einer mechanischen umformpresse verschieblich gelagerten, patrizenseitigen auswerfer
DE10050618C2 (de) * 2000-10-12 2003-04-24 Schuler Pressen Gmbh & Co Auswerfersystem für eine Presse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254437B (de) * 1964-04-10 1967-11-16 Fritz Bernhard Hatebur Vorrichtung zur Steuerung von Hilfselementen, wie Pressschlittenauswerfer, Pressschlittenfuehrungshuelse od. dgl. fuer Doppeldruck- und Mehrstufenpressen
NL6704472A (fr) * 1967-03-29 1968-09-30
DE2637969A1 (de) * 1976-08-24 1978-03-02 Neiman Gmbh & Co Kg Fraesvorrichtung fuer die steuerungsnut eines flachschluessels
US4145784A (en) * 1977-09-15 1979-03-27 Textron Inc. Timed ejector for a header
DE2812695C3 (de) * 1978-03-23 1981-02-19 Hatebur Umformmaschinen Ag, Basel (Schweiz) Vorrichtung zum stempelseitigen Auswerfen eines Preßlings auf einer Querförderpresse zur spanlosen Metallumformung

Also Published As

Publication number Publication date
DE3666548D1 (en) 1989-11-30
EP0241571A1 (fr) 1987-10-21

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