EP0330914B1 - Dispositif d'éjection des pièces hors des matrices dans une presse de formage - Google Patents

Dispositif d'éjection des pièces hors des matrices dans une presse de formage Download PDF

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Publication number
EP0330914B1
EP0330914B1 EP89102631A EP89102631A EP0330914B1 EP 0330914 B1 EP0330914 B1 EP 0330914B1 EP 89102631 A EP89102631 A EP 89102631A EP 89102631 A EP89102631 A EP 89102631A EP 0330914 B1 EP0330914 B1 EP 0330914B1
Authority
EP
European Patent Office
Prior art keywords
ejector
lever
bearing
drive
plane
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
EP89102631A
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German (de)
English (en)
Other versions
EP0330914A1 (fr
Inventor
Oskar Rahn
Günter Riedisser
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
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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 EP0330914A1 publication Critical patent/EP0330914A1/fr
Application granted granted Critical
Publication of EP0330914B1 publication Critical patent/EP0330914B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/08Accessories for handling work or tools
    • B21J13/14Ejecting devices
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/005Cammed

Definitions

  • the invention relates to a device of the generic type.
  • the ejector plunger serves to eject the workpiece which is shaped or partially formed in the step and to hold back when forming an extension which is extended downwards.
  • the ejector movement is to be adjusted to the length of such an approach.
  • a device of the generic type is known from DE 19 27 830 C2.
  • the ejector stroke can be adjusted by changing the lever ratios on the ejector lever and for this a press-proof stop is provided as a counterpart for the ejector plunger during the forming.
  • the ejector stroke which can be set to different lengths of different workpieces, causes a different removal level from workpiece to workpiece.
  • DE 24 14 442 C2 describes an ejector device in a forming press with a press-side stop that can be adjusted to the length of the shoulder on the workpiece. This type of setting is cumbersome and time-consuming. In addition, as the gear ratio changes, the removal level for the workpiece also shifts.
  • a forming press is known from EP 0 151 204 A1 with a pressure cylinder in the force curve of the ejector force in order to prevent overload when the ejector is clamped.
  • the forming press has a two-armed ejector lever with one drive-side and one output-side, ejector-side Poor.
  • a drive linkage engages in a plane of attack on the drive arm;
  • An ejector tappet is acted on via an ejector-side tap level.
  • Attack plane and tap plane run parallel to each other and in the ejector position parallel to the displacement plane.
  • the plane of displacement results from the adjustment of a support for changing the gear ratio of the ejector lever.
  • the removal level (ejector position) that can be reached by the ejector plunger should be the same even with different attachment lengths, using a press-proof stop as a counter-system during the forming process.
  • the separation of roles in their assignments on the one hand to the ejector plunger and on the other hand to the ejector lever causes a rolling (rolling) and thus low-friction transition during the forming and ejector movement despite counter-rotating movements.
  • the ease of maintenance is significantly increased due to the adjustable mounting of the ejector lever via a slide arrangement.
  • the drive linkage for the power take-off from a curve and the introduction of force into the ejector lever enables a tilt-free implementation of the movements using swivel joints. Overall, the ejector system is protected against overload.
  • Fig. 1 drive deflection and ejector means for ejecting a workpiece from a die 3 are shown in the table-side ejector area 1 of the press frame 2.
  • the ejector tappet 4 can be actuated directly or via an ejector rod 6 by an ejector lever 5.
  • the ejector lever 5 is mounted in a support 14 on a bearing block 13 in a carriage 16.
  • the position numbers 15 refer to the required fastening means between the bearing block 13 and the slide 16.
  • the carriage 16 is displaceable in guides 17 by means of a spindle 18 and an adjusting means 19 which rotates to the left and right.
  • a roller assembly 8 is provided, which is mounted on the freely movable end of an intermediate lever 7 at 38.
  • the from e.g. individual tabs 39 existing intermediate lever 7 is pivotable about a point fixed to the frame.
  • the multiple parts of this roller arrangement 8 can be seen in more detail from the sectional view in FIG. 2, the same position numbers being used for the same parts.
  • the fixed stop 9 is designed as a roller in the pivot point 40 fixed to the frame.
  • the angle lever 5 can be acted upon via a drive linkage 21 in the sense of an ejector movement.
  • the drive linkage 21 consists essentially of a parallel guide, for example a straight guide for the rollers 29, 27.
  • the rollers 29, 27 can also be rotatably mounted on a crank arm 23 or on a swing arm 25 via rotary bearings 28, 26 .
  • Crank arm 23 and swing arm 25 are fixed to the frame in bearings 22 but are mounted so that they can swing.
  • the parallel links 23 and 25 are connected via a coupling arm 24 in the pivot bearings 28 and 26, respectively.
  • a pressure cylinder 33 is introduced, which holds the roller 29 on the cam 31 under pressure, the roller 27 on the upper side - the attack plane 20 '- another, attached to the ejector lever 5 hardened pressure plate 20.
  • the counterforce for this is applied via an energy accumulator 47, for example a further pressure cylinder.
  • the cam disc 31 is continuously rotating via a press drive shaft 30. Item 32 marks the extension of the piston rod led out of the pressure cylinder 33.
  • Fig. 1b shows the geometric development of a curve 11 on the underside of the ejector lever 5 in the region of its abutment on the supporting support 9.
  • the angle lever 5, which is replaced here by a template to be machined, is with the attack plane 20 'by means of the energy accumulator 47 guided against the roller 27 on the drive linkage 21.
  • the drive linkage 21 assumes the deformed position, the cam disk 31 shown in FIG. 1a being rotated by 180 degrees. If the ejector lever 5 characterizing template is now moved in the direction of arrow 35 from position 14 into positions 14 ', 14 ⁇ , 14 ′′′, this displacement movement corresponding to the movement of ejector lever 5 in Fig.
  • the ejector stroke which is shown in the following FIGS. 3a to 3d numbered 45 is determined by the length of a shoulder 44 on a workpiece 43.
  • 3a to 3d added workpieces 43 differ in the length of their approaches 44.
  • the position numbers from FIG. 1a have been partially adopted. These indicate the same arrangements and parts.
  • Fig. 3a shows the ejector position for the ejector lever 5 and the counter abutment position 5 'of the ejector lever 5 on the supporting support 9 for a long shoulder 44 on the workpiece 43.
  • the pivot bearing 14 of the angle lever 5 is in the position moved to the right, so that a shorter distance - drive arm 42 - between the center of the roller 27 or its support on the attack plane 20 'and the center of the pivot bearing 14 and a longer distance - the output arm 41 - between the center of the pivot bearing 14 and the center of the roller 36 or its support on the tap level 12 'is set. This initially causes a larger ejector stroke 45, which is required for the projection 44.
  • the angle lever 5 Since the angle lever 5 is to be prevented from further movement in the pressing direction by the supporting support 9 for the forming process, the angle lever 5 must have a width for this purpose, which is indicated by 48 and which results from the distance between the top - tap level 12 '- of the ejector lever 5 in its ejector position and the outer shape of the supporting bearing 9, minus the size of the ejector stroke 45.
  • the development of the width 48 was evident from FIG. 1b.
  • the angle lever 5 can be moved to the left by the adjusting means 19 in FIG. 1a, for example into the positions 14 ', 14 ⁇ , 14 ′′′ or in corresponding intermediate positions.
  • the ejector stroke 45 corresponding to the projection 44 on the workpiece 43 is small.
  • the ejector lever 5 has a greater width 48 in the area between the rollers 36, 37 and the supporting support 9.
  • the figures 3b and 3c show the angle lever 5 in the positions 14 'and 14 ⁇ with a corresponding width 48.

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

Claims (8)

1. Dispositif pour éjecter des pièces hors des matrices dans une presse de formage, comportant un levier d'éjection (5) à deux bras, dont le bras (42) situé du côté de l'entraînement est entraîné par une tringlerie de commande (21) mue à la cadence de la presse et est attaqué par cette tringlerie (21) sur un plan d'attaque (20′) du levier (5) du côté de l'entraînement, et dont le bras (41) situé du côté de l'éjecteur agit sur un poussoir d'éjection (4) dont l'entraînement est attaqué par un plan d'attaque (12′) du levier (5) du côté de l'éjection, et où les plans d'attaque (20′, 12′) ménagés sur le levier d'éjection (5) du côté de l'entraînement et du côté de l'éjection sont parallèles au plan de déplacement (double flèche 35) de l'appui (14) quand le levier d'éjection (5) est mis dans la position d'éjection, le rapport de transmission du levier d'éjection (5) pouvant être modifié par déplacement de son appui (14) pour modifier la course d'éjection (45), le dispositif comportant en outre une butée (9) soutenant le bras (41) situé du côté de l'éjection, caractérisé en ce que le levier d'éjection (5) présente un bombement convexe dans sa zone (11) d'appui sur la butée (9) et en ce que la forme convexe de cette zone d'appui (11) est déterminée par des points de contact (11, 11′, 11˝, 11‴) entre le levier d'éjection (5) et la forme extérieure de la butée (9) lors du déplacement du levier (5) avec son appui (14) dans la direction de la double flèche (35) avec appui glissant du plan d'attaque (20′) contre la tringlerie (21) reculée en position de formage, de sorte que le levier d'éjection (5) présente une épaisseur différente (48 ) entre le plan d'attaque (12′) et la butée (9) pour chaque rapport de transmission, afin de compenser les différences de course d'éjection (45), et que cette épaisseur (48) est égale à la distance entre le plan d'attaque (12′) dans la position d'éjection du levier (5) et la butée (9), moins la longueur de la course d'éjection (45) dans cette position de fonctionnement.
2. Dispositif selon la revendication 1, caractérisé en ce que la butée (9) est un galet rotatif.
3. Dispositif selon la revendication 1, caractérisé en ce que la butée (9) est fixée au bâti (2) de la presse dans le prolongement du poussoir d'éjection (4) .
4. Dispositif selon la revendication 1, caractérisé par un mécanisme à galets (8) comprenant un levier intermédiaire à un seul bras (7), monté de manière oscillante sur le bâti (2) de la presse, et des galets (36, 37) montés à l'extrémité librement mobile de ce levier de manière à tourner indépendamment les uns des autres, dont au moins un galet (37) coopère avec la face frontale inférieure du poussoir d'éjection (4) ou d'une tige (6) prolongeant celui-ci et dont au moins un autre galet (36) coopère avec le plan d'attaque (12′) du levier d'éjection (5).
5. Dispositif selon la revendication 1, caractérisé en ce que le levier d'éjection (5) est monté sur un palier rotatif (14) d'un support de palier (13) et, par l'intermédiaire de ce support (13), sur un chariot (16) mobile dans des glissières (17) et réglable au moyen d'une servo-commande (19).
6. Dispositif selon la revendication 1, caractérisé en ce que la tringlerie de commande (21) est constituée par une tringlerie parallèle ayant un bras de manivelle (23) et un bras oscillant (25) de longueurs égales et en ce que la transmission de la force pour le mouvement d'éjection s'effectue longitudinalement dans une bielle (24), entre l'introduction de cette force par l'entraînement de la presse (30, 31) et l'application de la force au levier d'éjection (5).
7. Dispositif selon la revendication 6, caractérisé en ce que l'introduction de la force sur la bielle (24) et son application au levier d'éjection (5) s'effectuant par l'intermédiaire de galets (29, 27) qui sont montés de manière rotative aux extrémités du bras de manivelle (23) et du bras oscillant (25).
8. Dispositif selon la revendication 7, caractérisé en ce que la bielle (24) comporte un vérin à pression (33) qui, lorsqu'il est sous pression, presse le galet (29) contre une came (31) entraînée par la presse, et le galet (27) contre le bras (42) du levier (5) situé du côté de l'entraînement.
EP89102631A 1988-02-27 1989-02-16 Dispositif d'éjection des pièces hors des matrices dans une presse de formage Expired - Lifetime EP0330914B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3806352A DE3806352A1 (de) 1988-02-27 1988-02-27 Vorrichtung zum auswerfen von werkstuecken aus matrizen in einer umformpresse
DE3806352 1988-02-27

Publications (2)

Publication Number Publication Date
EP0330914A1 EP0330914A1 (fr) 1989-09-06
EP0330914B1 true EP0330914B1 (fr) 1992-04-22

Family

ID=6348396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102631A Expired - Lifetime EP0330914B1 (fr) 1988-02-27 1989-02-16 Dispositif d'éjection des pièces hors des matrices dans une presse de formage

Country Status (5)

Country Link
US (1) US5067892A (fr)
EP (1) EP0330914B1 (fr)
DE (2) DE3806352A1 (fr)
ES (1) ES2032062T3 (fr)
WO (1) WO1993013893A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR0010299A (pt) * 1999-05-03 2002-04-23 Cincinnati Milacron Inc Aparelho eletricamente acionado para ejetar partes moldadas por injeção
DE10005676C2 (de) * 2000-02-07 2003-04-24 Demag Ergotech Wiehe Gmbh Auswerfereinrichtung für eine Spritzgießmaschine für Kunststoffe
GB2360235B (en) * 2000-03-10 2002-02-06 Platarg Engineering Ltd Workpiece ejector for transfer press
DE10150101B4 (de) * 2000-09-23 2008-09-11 Schuler Pressen Gmbh & Co. Kg Presse und Verfahren zum Umformen von Werkstücken
DE10063154B4 (de) * 2000-12-18 2005-02-10 Nedschroef Herentals N.V. Schmiedepresse mit Stellvorrichtung auf Matrizenseite
DE10213850C1 (de) * 2002-03-27 2003-06-05 Wafios Ag Matritzenseitige Auswerfvorrichtung für Werkstücke bei Ein- und Mehrstufenpressen
US20040137104A1 (en) * 2003-01-13 2004-07-15 Fu Sheng Industrial Co., Ltd. Demolding device for a wax pattern for a golf club head
US7232539B2 (en) * 2003-06-20 2007-06-19 Jere F. Irwin Trim press, article ejecting device, trim press article ejector, and method of stacking and cleaning out thermoformed articles
TWI464049B (zh) * 2012-07-26 2014-12-11 Techwin Opto Electronics Co Ltd Injection Molding Machine Lever Mold Extrusion Mechanism
CN102909306A (zh) * 2012-10-26 2013-02-06 常州市立威刀具有限公司 机械式自动下顶件装置
CN107755571B (zh) * 2016-08-19 2024-05-14 北京机电研究所 一种下顶出机构
CN109352914B (zh) * 2018-11-07 2023-10-17 宁波帅特龙集团有限公司 一种成型车用音箱盖板的模腔组件
CN109719901A (zh) * 2019-01-27 2019-05-07 魏新文 一种机械零部件倒灌模具
CN110711823B (zh) * 2019-10-25 2020-11-17 乐清泰起知识产权服务有限公司 一种冲压后自动卸料的五金加工辅助用转运装置
KR20210085718A (ko) 2019-12-31 2021-07-08 주식회사 코어볼트 내벽용 앵커볼트
CN117261086B (zh) * 2023-11-17 2024-06-04 深圳市洁盟塑胶五金制品有限公司 一种高分子材料注射发泡成型模具

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US1639840A (en) * 1926-08-14 1927-08-23 Davis Roy Paul Miller Inertia stripper
US3266071A (en) * 1965-03-29 1966-08-16 Hilgeland Fa Geb Cam-controlled apparatus for throwing out the bolts from the counter punch of bolt presses or the like
US3440860A (en) * 1966-07-18 1969-04-29 Textron Inc Cyclic positioning mechanism
DE1627977B2 (de) * 1967-02-06 1978-01-05 Vyzkumny ustav tvarecich stroju a technologie tvareni, Brunn (Tschechoslowakei) Auswerfvorrichtung an einer mechanischen presse
DE1927830A1 (de) * 1969-05-31 1970-12-17 Schuler Gmbh L Vorrichtung zum Auswerfen von Werkstuecken aus Pressmatrizen
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DE2414442C2 (de) * 1974-03-26 1987-02-19 L. Schuler GmbH, 7320 Göppingen Auswerfeinrichtung zum Auswerfen von Preßteilen aus der Matrize einer Presse
DE3322944C2 (de) * 1983-06-25 1987-03-19 Eumuco Aktiengesellschaft für Maschinenbau, 5090 Leverkusen Matrizenauswerfer-Vorrichtung für Mehrstufen-Umformmaschinen
EP0151204B1 (fr) * 1984-02-09 1988-02-03 L. SCHULER GmbH Presse à frapper les monnaies

Also Published As

Publication number Publication date
WO1993013893A1 (fr) 1993-07-22
DE3806352A1 (de) 1989-09-07
DE58901209D1 (de) 1992-05-27
EP0330914A1 (fr) 1989-09-06
ES2032062T3 (es) 1993-01-01
US5067892A (en) 1991-11-26

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