EP0161643B1 - Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage - Google Patents

Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage Download PDF

Info

Publication number
EP0161643B1
EP0161643B1 EP85105749A EP85105749A EP0161643B1 EP 0161643 B1 EP0161643 B1 EP 0161643B1 EP 85105749 A EP85105749 A EP 85105749A EP 85105749 A EP85105749 A EP 85105749A EP 0161643 B1 EP0161643 B1 EP 0161643B1
Authority
EP
European Patent Office
Prior art keywords
segment
ejector
clamping
arc guide
circular
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 - Lifetime
Application number
EP85105749A
Other languages
German (de)
English (en)
Other versions
EP0161643A3 (en
EP0161643A2 (fr
Inventor
Helmut Dumschat
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.)
Schuler AG
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
Publication of EP0161643A2 publication Critical patent/EP0161643A2/fr
Publication of EP0161643A3 publication Critical patent/EP0161643A3/de
Application granted granted Critical
Publication of EP0161643B1 publication Critical patent/EP0161643B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/32—Discharging presses
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/16—Joints and connections with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature
    • Y10T403/1633—Utilizing fluid pressure

Definitions

  • the invention relates to a device for ejecting the molded parts from the die in a forming press, with an ejector movable in the die and with a drive lever operatively connected to the drive of the forming press and via a linkage device with the ejector, the linkage device consisting of a on a circular arc guide on Drive lever adjustable via an adjusting device and fixed in a clamping point via a clamping element and releasable segment and consists of at least one coupling element between the segment and ejector.
  • Forming presses in particular those for the massive forming of blanks into molded parts, have ejectors on the die side in the number of processing steps to be carried out.
  • the ejectors serve in at least some processing stages to determine the depth of penetration of the blank into the die during the molding process.
  • the ejectors can be set individually for each processing stage when the press is at a standstill. Both the stroke length and the time of ejection can be infinitely adjusted.
  • the ejecting process requires great power transmission. A change - a reduction - in the ejector path during operation inevitably leads to a collision between the molded part that remains in the die and the newly added blank.
  • DE-PS 20 28 963 a multi-stage press for the non-cutting production of molded parts such as bolts, nuts and the like. described with a crankshaft driven in time with the tappet. Their deflection movement is transmitted to a two-armed drive lever which is operatively connected to the ejector via a linkage device.
  • the articulation device essentially consists of a coupling element pivotably articulated on the ejector. With the other end, the coupling element is pivotally attached to a segment which, in an end position of the ejector on the drive lever, can be adjusted and locked in a circular arc around the articulation point of the coupling element on the ejector.
  • a screw bolt with a nut attached to the segment is used for this purpose.
  • DE-OS 30 21 790 also shows a forming press with an ejector drive.
  • a drive lever which can be pivoted about a pivot point by a cam drive in time with the forming movement of the press, has a circular arc guide in a lever arm, on which a segment can be adjusted via a pressure cylinder to change the lever ratios and can be fixed and released via a wedge connection acted upon by a pressure cylinder.
  • the segment is articulated via a coupling element to a two-armed ejector lever, which is operatively connected to the ejector.
  • the circular arc guide and the segment are placed in the curvatures of their contact surfaces on a common circular arc center.
  • the center point lies in the articulation point of the coupling element on the ejector lever at the maximum ejector position.
  • the wedge connection acts tangentially on the outer circumference of the circular arc guide by tightening the segment against the inner circumference. With this device, too, there is the possibility of wedging the segment on the bearing surface of the drive lever without the wedge connection causing a release movement in the sense of a lifting movement of the segment is effected by the drive lever, so that an automatic adjustment of the segment on the circular arc guide is not guaranteed.
  • the coupling element works in the transmission of the ejector movement to train, and tensioning elements are to be guided around the drive lever on both sides. The advantage of this ejector device of the lower expenditure of force when fixing the segment via the wedge effect is considerably reduced by the necessary adaptation, such as spotting and scraping work.
  • each individual clamping point can be tensioned and released in a targeted manner.
  • the features of claim 3 reduce the dimensions in the area of the suspension of the coupling element.
  • the features according to claim 4 ensure an adjustment between a maximum ejector stroke and an ejector stroke at least close to zero.
  • the clamping elements are fixed to the segment in a preferred arrangement.
  • an ejector 2 is mounted in a bearing bush 3 and is displaceably mounted therein.
  • the bearing bush 3 contains at least one return spring for the ejector 2.
  • the protruding end part 4 of the ejector 2 protrudes into a die 6 indicated here in dash-dotted lines is placed against the ejector 2.
  • the pressure piece 9 is located on a on the ejector lever 8 at 11 pivotally mounted shift lever 12, which is held by means of tear-off pin 13, which serves to secure the ejector mechanism when the ejector 2 is blocked by the molded part, in a position guided against the ejector 2.
  • the cam disc 16 is rigidly attached to a shaft 19 driven by the press drive, and can be replaced if necessary.
  • the drive lever 18 is acted upon by a pressure cylinder 21 for the abutment of the roller 17 on the cam disk 16.
  • the dash-dotted lines 18 'and 21' show these parts in the position of the abutment of the roller 17 on the base circle 16 'of the cam disk 16.
  • a circular arc guide, numbered 22 overall is provided, as can be seen in detail in FIGS. 2 and 3 and will be explained in more detail below.
  • a segment 23 is slidably mounted on the circular arc guide 22 in the longitudinal direction of the circular arc guide 22.
  • the circular arc guide 22 extends beyond the area of the pivot point 14 on the drive lever 18.
  • a coupling member 27 is pivotally mounted for transmitting the pivoting movement of the Drive lever 18 on the ejector lever 8.
  • the segment 23 can be adjusted in the circular arc guide 22 by means of an adjusting device, numbered 28 overall, into the position 23 'of the segments 23 and 27' of the coupling element 27, as well as in any intermediate position.
  • the adjustment takes place at an ejector lever position which corresponds to the maximum ejector stroke, the guide radii of the circular arc guide 22 having their center in the articulation or pivot point 26 of the coupling element 27 on the ejector lever 8.
  • the dash-dotted position 8 'denotes the fully retracted ejector lever 8.
  • the adjusting device 28 consists essentially of, for example, a pressure cylinder with a cylinder housing 31 which is pivotally mounted in a pivot point 29 on the drive lever 18 and a piston rod 33 which is pivotably articulated at 32 on the segment 23.
  • the determination of the segment 23 in the position set via the adjusting device 28 takes place here via two clamping elements, numbered 34 in total.
  • the circular arc guide 22 has a support surface 36, against which the segment 23 is placed with a counter support surface 37.
  • the support surface 36 and counter-support surface 37 have been produced according to different radius dimensions, the radius dimension 38, according to which the counter-support surface 37 is manufactured, being slightly smaller than the radius dimension 39 of the support surface 36.
  • the circular arc guide 22 also has a T-shaped groove 41, into each of which a T-slot screw 47 or possibly the T-shaped end piece 48 of a piston is inserted for each clamping point.
  • the locking of the segment 23 on the circular arc guide 22 is formed for each clamping point by a separate pressure cylinder, or, as shown in the exemplary embodiment in FIGS. 1 to 3, in that regions of the segment 23 lying in the longitudinal extension of the circular arc guide 22 are at a distance from one another Cavities 42 are incorporated, which are closed by an end plate 43.
  • a piston 44 is inserted, which can be acted upon by pressure lines 45, 46 in the cavity 42.
  • a T-slot screw 47 can be moved, which can be placed and braced with the T-shaped end part 48 behind the bearing surface 49. The bracing takes place when pressure is applied through the pressure line 45 with deformation of the drive lever 18 and the segment 23.
  • the deformation of the drive lever 18, for example made of cast steel or nodular cast iron, and the segment 23 takes place well below their elastic limit.
  • the tensioning elements 34 are released while the drive lever 18 and segment 23 are simultaneously deformed back by relieving the pressure line 45 and, if appropriate, by pressurizing the pressure line 46.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Claims (5)

  1. Dispositif pour éjecter les pièces estampées de la matrice dans une presse de formage, comportant un éjecteur (2) mobile dans la matrice (6) et un levier d'entraînement (18) couplé à l'entraînement (16, 19) de la presse (1) et couplé à l'éjecteur (2) par un mécanisme articulé (8, 23, 24, 26, 27), ce mécanisme comportant un segment (23) réglable en position sur une glissière en arc de cercle (22) du levier d'entraînement (18), au moyen d'un dispositif de réglage (28), et agencé pour être bloqué et libéré au moyen d'un élément de blocage (34), et au moins un couplage (27) entre le segment (23) et l'éjecteur (2), caractérisé en ce que la surface d'appui (36) prévue sur la glissière en arc de cercle (22) pour l'appui du segment (23) et la surface opposée (37) prévue sur le segment (23) présentent des courbures superficielles différentes (rayons 38, 29), ladite surface opposée (37) étant usinée avec un rayon (38) légèrement plus petit que celui de la surface d'appui (36), en ce qu'un élément de blocage (34) est disposé sur le segment (23) et mobile avec lui et comporte une pièce de blocage (47) qui bloque le segment (23) sur la glissière (22), en ce qu'avec l'utilisation de plusieurs éléments de blocage (34) disposés à distance les uns des autres sur le segment (23) et mobiles avec le segment (23), et pourvus de pièces de blocage (47) susceptibles d'être bloquées sur la glissière (22), ladite surface opposée (37) est pressée contre la surface d'appui de la glissière (22) avec une déformation élastique du segment (23), et en ce que chacun des éléments de blocage utilisés (34) est pourvu de moyens de commande pour un mouvement de blocage et de libération.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un élément de blocage (34) pourvu de moyens de commande du genre d'un vérin a pression de fluide est disposé sur le segment (23) à chaque emplacement de blocage, le piston (44) du vérin ayant un prolongement pourvu d'une tête (48) en forme d'ancre, susceptible d'être bloquée sur le levier d'entraînement (18) dans une rainure (41) de ladite glissière (22).
  3. Dispositif selon la revendication 1, caractérisé en ce qu'un vérin à pression de fluide (34) est ménagé dans le segment (23) à chaque emplacement de blocage et comporte une chambre cylindrique (42) formée par le segment (23), une plaque de fermeture (43) amovible et obturant la chambre cylindrique (42), un piston (44) mobile dans la chambre cylindrique (42) et susceptible de recevoir une pression, et un boulon (47) inséré dans le piston (44) et agencé pour être fixé au piston (44) avec une tête (48) en forme d'ancre, susceptible d'être bloquée sur le levier d'entraînement (18) dans une rainure (41) de ladite glissière (22).
  4. Dispositif selon la revendication 1, dans lequel ladite glissière (22) destinée au segment (23) a un tracé en arc de cercle dont le centre se trouve au point d'articulation (26) de l'élément de couplage (27) sur l'éjecteur (2) ou, en cas d'interposition d'un levier d'éjecteur (8), sur le levier d'éjecteur (8) quand celui-ci est dans une position de fin de course, caractérisé en ce que ladite glissière (22) est prolongée au-delà de la zone du point de pivotement (14) du levier d'entraînement (18), et en ce que, dans une position du segment (23), le point d'articulation (26) de l'élément de couplage (27) sur l'éjecteur (2) ou, le cas échéant, sur le levier d'éjecteur (8), le point d'articulation (24) sur le segment (23) et le point de pivotement (14) du levier d'entraînement (18) sont alignés sur une droite (25).
  5. Dispositif selon la revendication 1, caractérisé en ce que des éléments de blocage respectifs (34) sont disposés des deux côtés du point d'articulation (24) de l'élément de couplage (27) sur le segment (23) et sont espacés l'un de l'autre dans la direction longitudinale du segment (23).
EP85105749A 1984-05-18 1985-05-10 Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage Expired - Lifetime EP0161643B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843418508 DE3418508A1 (de) 1984-05-18 1984-05-18 Einrichtung zum auswerfen der formteile aus der matrize in einer umformpresse
DE3418508 1984-05-18

Publications (3)

Publication Number Publication Date
EP0161643A2 EP0161643A2 (fr) 1985-11-21
EP0161643A3 EP0161643A3 (en) 1988-04-27
EP0161643B1 true EP0161643B1 (fr) 1991-05-08

Family

ID=6236222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105749A Expired - Lifetime EP0161643B1 (fr) 1984-05-18 1985-05-10 Dispositif pour l'éjection des pièces estampées de la matrice dans une presse de formage

Country Status (3)

Country Link
US (1) US4635463A (fr)
EP (1) EP0161643B1 (fr)
DE (2) DE3418508A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1303027B1 (it) * 1998-04-17 2000-10-20 Carlo Salvi & C S R L Dispositivo di regolazione per la formatura di minuterie metalliche
DE10005676C2 (de) * 2000-02-07 2003-04-24 Demag Ergotech Wiehe Gmbh Auswerfereinrichtung für eine Spritzgießmaschine für Kunststoffe
CN100408224C (zh) * 2005-07-13 2008-08-06 金谙工业股份有限公司 锻造部品成型机的前通出机构

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752801A (en) * 1952-12-11 1956-07-03 William J Rawitzer Fluid actuated clamp
US3238761A (en) * 1963-03-07 1966-03-08 Textron Inc Machine for forming metal articles
US3688322A (en) * 1970-07-08 1972-09-05 Nedschroef Octrooi Maats Machine for upsetting bolts and similar articles
US4075923A (en) * 1976-06-17 1978-02-28 Latham Raymond E Fastener tensioning apparatus
DE2845092A1 (de) * 1978-10-17 1980-04-24 Beche & Grohs Gmbh Verfahren zum loesen eines schmiedestueckes aus einem werkzeug sowie schabotte- oder gegenschlaghammer, welcher mit einem ausstosser zum loesen eines schmiedestueckes versehen ist
DE3021790A1 (de) * 1980-06-11 1981-12-17 Peltzer & Ehlers Gmbh & Co, 4150 Krefeld Umformpresse zur herstellung von pressteilen
DE3121330A1 (de) * 1981-05-29 1982-12-16 A. Römheld GmbH & Co KG, 6312 Laubach Palettenspannsystem fuer werkzeugmaschinen

Also Published As

Publication number Publication date
DE3418508A1 (de) 1985-11-21
US4635463A (en) 1987-01-13
EP0161643A3 (en) 1988-04-27
DE3582748D1 (de) 1991-06-13
EP0161643A2 (fr) 1985-11-21

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