EP0057741B1 - Entraînement de presse - Google Patents

Entraînement de presse Download PDF

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Publication number
EP0057741B1
EP0057741B1 EP81100932A EP81100932A EP0057741B1 EP 0057741 B1 EP0057741 B1 EP 0057741B1 EP 81100932 A EP81100932 A EP 81100932A EP 81100932 A EP81100932 A EP 81100932A EP 0057741 B1 EP0057741 B1 EP 0057741B1
Authority
EP
European Patent Office
Prior art keywords
press
knee joint
drive according
press drive
articulated
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
EP81100932A
Other languages
German (de)
English (en)
Other versions
EP0057741A1 (fr
Inventor
Hans-Martin Dommer
Alfred Bareis
Ewald Bergmann
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 EP81100932A priority Critical patent/EP0057741B1/fr
Priority to AT81100932T priority patent/ATE8756T1/de
Priority to DE8181100932T priority patent/DE3165146D1/de
Priority to BR8200650A priority patent/BR8200650A/pt
Priority to JP57018993A priority patent/JPS57152398A/ja
Priority to ES509467A priority patent/ES8301766A1/es
Priority to US06/348,015 priority patent/US4419929A/en
Publication of EP0057741A1 publication Critical patent/EP0057741A1/fr
Application granted granted Critical
Publication of EP0057741B1 publication Critical patent/EP0057741B1/fr
Expired 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
    • B30B15/0064—Counterbalancing means for movable press elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/106—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by another toggle mechanism
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8696—Means to change datum plane of tool or tool presser stroke
    • Y10T83/87—By varying length of tool stroke
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8824—With provision for dynamic balance
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8837—With application of force to opposite ends of tool supporting crosshead
    • Y10T83/884—By connecting rod articulated with tool support
    • 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
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8845—Toggle links, one link pivoted to tool support

Definitions

  • the invention relates to a press drive for a high-speed press, wherein a pair of counter-rotating eccentric shafts driven in engagement with one another is mounted in the press head piece, the eccentrics being connected to a plunger by means of connecting elements arranged symmetrically to one another, and the opposite masses corresponding to each other acting mass balance weights are provided.
  • the well-known press drive which is especially designed for high-speed mechanical presses, contains a central eccentric shaft that is functionally connected to a sliding block via connecting rods.
  • Tabs or one-armed levers are articulated symmetrically to one another on the sliding block, via which a plunger can be moved indirectly by means of a further articulated connection.
  • the one-armed levers are mounted opposite the articulation of the sliding block on ram adjustments, which are arranged fixed to the press frame.
  • Push rods which act between the plunger and the one-armed levers, serve as a further articulated connection.
  • mass balance weights are provided via further links and double levers, which enable a complete dynamic mass balance.
  • the usual arrangement namely an eccentric bushing that can be rotated relative to an eccentric, is provided for the stroke adjustment.
  • the dynamic behavior of the press is influenced unfavorably by the arrangement of the bearings in the power flow and by the arrangement of the one-armed levers, so that, among other things, the depth of immersion of the upper tools in the lower tools increases with increasing stroke rates , since the number of bearing clearances and also the elastic deformation of the one-armed levers, which are subjected to bending, significantly reduce the rigidity of the overall system.
  • the invention is therefore based on the object of specifying a press drive which, with complete dynamic mass balancing, is constructed with a minimum of bearings located in the force flow, and which has components lying in the force flow exclusively subjected to pressure and tension.
  • the press drive according to the invention fulfills the requirements set out at the outset, a minimum of bearings in the power flow, namely three per knee joint, no components subjected to bending stress, as a result of which the masses to be moved are reduced and a lighter design can be achieved.
  • the press drive according to the invention thus achieves high rigidity, which results in a reduction in tool wear, since the immersion depth and the other dynamic behavior are positively influenced. If the press drive according to the invention is equipped with a stroke adjustment device, the feed phase of a feed device which is driven directly by the press drive remains constant during a stroke adjustment.
  • the arrangement of the two eccentric shafts makes it easy to balance the rotating masses; Due to the construction with two eccentric shafts and connecting rods, the press is largely insensitive to eccentric loads during cutting.
  • 1 and 2 is constructed symmetrically to two crank or eccentric shafts 10.
  • Two connecting rods 11 are articulated on the eccentric shafts 10.
  • the connecting rods 11 are connected via extensions 17, 18 to first knee joints 19, 20 and 21, 22 arranged almost horizontally.
  • the first knee joints 19, 20 and 21, 22 are mounted with their links 19, 21 on support points 23, 24 in a press frame, while the links 20, 22 are connected to second knee joints 25, 26 and 27, 28 arranged almost vertically via extensions 29, 30 are.
  • the second knee joints 25, 26 and 27, 28 are with the links 25, 27 and their extensions 29, 30 are mounted on supports 31, 32 fixed to the press frame.
  • Mass balance weights 33, 34 are articulated on the links 26, 28 in a press-frame manner.
  • the press frame guided means that the mass balance weights 33, 34 are either guided on arcs 35, 36 on arcs that almost correspond to the tangents placed on the arcs, or in frame-fixed-s.
  • Fig. 2- guides 37, 38 are guided, which are arranged in synchronism with the guides of a plunger 39, not shown.
  • transmission straps 40, 41 are articulated, which are connected directly to third knee joints 42, 43 and 44, 45 arranged almost vertically.
  • the plunger 39 is articulated on the links 43, 45, while the links 42, 44 are supported on the plunger adjustment devices 46, 47, which are known per se, and are fixed in the press frame.
  • the variant shown in FIG. 2 differs from the press drive according to FIG. 1 by the already mentioned linear guides 37, 38 for the mass balance weights 33, 34 and the arrangement of the support points 23, 24.
  • the extensions 17 are omitted , 18, so that the connecting rods 11 are connected directly to the links 19, 21 of the first knee joints 19, 20 and 21, 22.
  • the support points 23, 24 are designed as such.
  • Fig. 3 shows a stroke adjustment device which is expediently used in the press drive according to Fig. 1.
  • Sliding blocks 48, 49 are guided in linear guides 50, 51 fixed to the press frame.
  • the sliding blocks 48, 49 are adjusted by a threaded spindle 52, 53, which are equipped with a worm wheel 54, 55 at the ends facing each other.
  • the worm wheels 54, 55 are driven by a common, central worm shaft 56, which can be designed to be movable either by motor or manually.
  • the stroke adjustment device is formed, which can preferably be used in a press drive according to FIG. 2.
  • the support points 23, 24 are arranged on levers 57, 58 which are fixed to the frame but are pivotable.
  • the pivotable levers 57, 58 are connected via connecting straps 59, 60 to a central sliding block 61 which can be adjusted by means of an adjusting spindle 62.
  • the adjusting spindle 62 is driven here via worm wheels 63, 64, whereby both a manual drive and a motor drive can be provided.
  • a comparison of the generic press drive with a press drive according to the invention shows that in a two-point drive for the known press drive according to DE-OS No. 2534628, thirteen articulation points or bearing points of a total of 31 bearing points must be arranged in the power flow, while in a comparable press drive according to the invention 6 only hinge points, ie, at two knee joints, the minimum number, is also of pivot points 31 in the force flow - are arranged.
  • the positions of the first knee joints 19, 20 and 21, 22 and the third Knee joints 42, 43 and 44, 45 are selected such that when the lower reversal point of the ram 39 is reached, the third knee joints 42, 43 and 44, 45 pass through the stretched position, while the first knee joints 19, 20 and 21, 22 pass through the flexion position.
  • the second knee joints 25, 26 and 27, 28 simultaneously pass through the extended position, so that, if the condition - the length ratios of the links 25, 26 and 27, 28 of the second knee joints 25, 26 and 27, 28 and the links 42, 43 are the same or 44, 45 of the third knee joints 42, 43 and 44, 45 and corresponding dimensioning of the mass balance weights 33, 34 of the links and the brackets of the press drive is mass balanced.
  • the second knee joints 25, 26 and 27, 28 are moved at exactly the same angle as the third knee joints 42, 43 and 44, 45 - in opposite directions in the example described.
  • the arrangement can also be constructed in such a way that the second and third knee joints are driven in pairs in the same direction but in opposite directions on one side.
  • a change in the stroke also automatically results in a change in the stroke of the mass balance weights 33, 34 articulated on the second knee joints 25, 26 and 27, 28.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Paper (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Vehicle Body Suspensions (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Claims (8)

1. Commande pour une presse rapide comportant dans sa tête de presse deux arbres d'excentrique (10) entraînés en rotation dans des sens contraires et en prise l'un avec l'autre, dont les excentriques sont reliés à un coulisseau (39) par des éléments de liaison disposés symétriquement, et dans laquelle sont prévus des poids d'équilibrage (33; 34) des masses, qui correspondent aux masses effectuant un mouvement de va-et-vient et agissant en sens contraire, caractérisée par la disposition en double au moins-symétriquement par rapport aux arbres d'excentrique (10) - de
a) une première genouillère à peu près horizontale (19, 20; 21, 22), qui est articulée à une bielle (11 ) reliée à l'arbre d'excentrique (10) et présente un point d'appui (23; 24) sur le bâti de presse,
b) une seconde genouillère à peu près verticale (25, 26; 27, 28) qui est reliée à la première genouillère (19, 20; 21, 22) et sur laquelle est articulé le poids d'équilibrage (33; 34) guidé sur le bâti de presse, et
c) une troisième genouillère à peu près verticale (42, 43; 44, 45) qui est reliée par une barre de transmission (40; 41) à la première (19, 20; 21, 22) et à la seconde genouillère (25, 26; 27, 28), articulée sur le coulisseau (39) et appuyée sur le bâti de presse (14) en direction du mouvement du coulisseau (39).
2. Commande de presse selon la revendication 1, caractérisée en ce que la troisième genouillère (42,43; 44, 45) atteint la position étendue lorsque le coulisseau (39) est à son point mort bas ou près de ce point et que la première genouillère (19, 20; 21, 22) passe en même temps par la position de flexion maximale.
3. Commande de presse selon l'une des revendications 1 ou 2, caractérisée en ce que le rapport des longueurs des éléments (25, 26; 27, 28) de la seconde genouillère est égal au rapport des longueurs des éléments (42, 43; 44, 45) de la troisième genouillère et en ce que la seconde et la troisième genouillère sont manoeuvrables en synchronisme angulaire.
4. Commande de presse selon une des revendications 1 à 3, caractérisée en ce que la troisième genouillère (42,43; 44, 45) est appuyée sur le bâti de presse (14) par l'intermédiaire d'un dispositif de réglage du coulisseau (46; 47).
5. Commande de presse selon une des revendications 1 à 4, caractérisée en ce que le point d'appui (23; 24) de la première genouillère (19, 20; 21, 22) sur le bâti de presse (14) est réalisé comme un dispositif de réglage de la course.
6. Commande de presse selon la revendication 5, caractérisée en ce que le dispositif de réglage de la course est constitué par une pièce (48; 49) coulissant dans un guide droit (50; 51) du bâti de presse (14).
7. Commande de presse selon la revendication 6, caractérisée en ce que la pièce coulissante (48; 49) est déplaçable par un arbre à vis sans fin central (56) par l'intermédiaire d'une broche filetée (52; 53) portant une roue tangente (54; 55).
8. Commande de presse selon la revendication 5, caractérisée en ce que le point d'appui (23; 24) est disposé sur un levier (57; 58) monté oscillant sur le bâti et relié par une barre d'accouplement (59; 60) à une pièce coulissante centrale (61 ) qui est déplaçable par une broche filetée (62) portant une roue tangente (63) commandée par une roue tangente supplémentaire (64).
EP81100932A 1981-02-11 1981-02-11 Entraînement de presse Expired EP0057741B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP81100932A EP0057741B1 (fr) 1981-02-11 1981-02-11 Entraînement de presse
AT81100932T ATE8756T1 (de) 1981-02-11 1981-02-11 Pressenantrieb.
DE8181100932T DE3165146D1 (en) 1981-02-11 1981-02-11 Press drive
BR8200650A BR8200650A (pt) 1981-02-11 1982-02-08 Acionamento de prensa
JP57018993A JPS57152398A (en) 1981-02-11 1982-02-10 Driving device for press
ES509467A ES8301766A1 (es) 1981-02-11 1982-02-10 "una disposicion de accionamiento para prensas rapidas".
US06/348,015 US4419929A (en) 1981-02-11 1982-02-11 Press drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81100932A EP0057741B1 (fr) 1981-02-11 1981-02-11 Entraînement de presse

Publications (2)

Publication Number Publication Date
EP0057741A1 EP0057741A1 (fr) 1982-08-18
EP0057741B1 true EP0057741B1 (fr) 1984-08-01

Family

ID=8187569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100932A Expired EP0057741B1 (fr) 1981-02-11 1981-02-11 Entraînement de presse

Country Status (7)

Country Link
US (1) US4419929A (fr)
EP (1) EP0057741B1 (fr)
JP (1) JPS57152398A (fr)
AT (1) ATE8756T1 (fr)
BR (1) BR8200650A (fr)
DE (1) DE3165146D1 (fr)
ES (1) ES8301766A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799065A (zh) * 2010-02-10 2010-08-11 华中科技大学 一种多连杆压力传动机构
CN102284660A (zh) * 2010-06-21 2011-12-21 南京农业大学 一种高速对称等长肘杆压力机的动平衡机构

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4920782A (en) * 1987-02-03 1990-05-01 Bruderer Ag Press drive
ATE64118T1 (de) * 1987-03-24 1991-06-15 Leinhaas Werner Schneid- und umformpresse mit hydro-mechanischem gelenkantrieb.
US4926671A (en) * 1988-12-05 1990-05-22 Hill James B Press brake
GB2234196B (en) * 1989-07-22 1993-02-17 Verson Hme Ltd Press and method of working material
JP2983247B2 (ja) * 1990-04-23 1999-11-29 株式会社小森コーポレーション 折機のチョッパ折装置
EP1038422A2 (fr) * 1998-07-13 2000-09-27 Koninklijke Philips Electronics N.V. Procede et appareil utilises pour la fabrication de dispositifs a semi-conducteurs
JP3701005B2 (ja) * 2000-05-11 2005-09-28 アイダエンジニアリング株式会社 プレス機械のスライド駆動装置
DE102007019963A1 (de) * 2007-04-27 2008-10-30 Sms Demag Ag Schneidvorrichtung
CN102145369A (zh) * 2010-12-09 2011-08-10 江苏省徐州锻压机床厂集团有限公司 一种高速精密压力机驱动机构
US11479032B2 (en) * 2019-05-27 2022-10-25 Bobst Mex Sa Platen press with a press toggle mechanism
CN110523901B (zh) * 2019-09-11 2021-03-23 上海应用技术大学 一种三点式可替换滑块压力机
CN111729960A (zh) * 2020-07-27 2020-10-02 明勖（东莞）精密机械有限公司 一种动态平衡的单肘节冲床

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH273192A (de) * 1948-08-24 1951-01-31 May Otto Ing Dr Kniehebelpresse.
US2808736A (en) * 1952-02-07 1957-10-08 Jackson Hydraulic Machine Co I Counterbalancing means for punch press
JPS5251661Y2 (fr) * 1971-09-10 1977-11-24
JPS5623259Y2 (fr) * 1974-04-13 1981-06-01
DE2428077B2 (de) * 1974-06-11 1980-04-24 Maschinenfabrik Weingarten Ag, 7987 Weingarten Vorrichtung für den Massenkraftausgleich des Stößels einer durch einen Kurbeltrieb angetriebenen Stanzmaschine
US4160409A (en) * 1974-09-03 1979-07-10 Bruderer Ag Drive for the movable work component, such as the ram of a press, stamping machine or the like
JPS5642224Y2 (fr) * 1977-11-29 1981-10-02
DE2804390A1 (de) * 1978-02-02 1979-08-09 Schuler Gmbh L Vorrichtung fuer einen intermittierenden betrieb bei einer nutenstanze
JPS5743823Y2 (fr) * 1978-03-08 1982-09-27
DE2934286C2 (de) * 1979-08-24 1984-06-14 L. Schuler GmbH, 7320 Göppingen Mehrpunkt-Pressenantrieb
JPH064693Y2 (ja) * 1986-11-19 1994-02-09 ヤンマー農機株式会社 ロ−ルベ−ラのベ−ル取出装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101799065A (zh) * 2010-02-10 2010-08-11 华中科技大学 一种多连杆压力传动机构
CN102284660A (zh) * 2010-06-21 2011-12-21 南京农业大学 一种高速对称等长肘杆压力机的动平衡机构

Also Published As

Publication number Publication date
DE3165146D1 (en) 1984-09-06
EP0057741A1 (fr) 1982-08-18
ES509467A0 (es) 1982-12-16
BR8200650A (pt) 1982-12-14
JPS57152398A (en) 1982-09-20
ES8301766A1 (es) 1982-12-16
US4419929A (en) 1983-12-13
ATE8756T1 (de) 1984-08-15

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