EP0314975B1 - Presse avec organes de blocage pour coulisseau - Google Patents

Presse avec organes de blocage pour coulisseau Download PDF

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Publication number
EP0314975B1
EP0314975B1 EP88117287A EP88117287A EP0314975B1 EP 0314975 B1 EP0314975 B1 EP 0314975B1 EP 88117287 A EP88117287 A EP 88117287A EP 88117287 A EP88117287 A EP 88117287A EP 0314975 B1 EP0314975 B1 EP 0314975B1
Authority
EP
European Patent Office
Prior art keywords
locking
locking bar
bolts
press
bar
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
EP88117287A
Other languages
German (de)
English (en)
Other versions
EP0314975A1 (fr
Inventor
Hermann Braun
Kurt Strommer
Eckhard Dr.-Ing. Brangs
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
Publication of EP0314975A1 publication Critical patent/EP0314975A1/fr
Application granted granted Critical
Publication of EP0314975B1 publication Critical patent/EP0314975B1/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
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/287—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing unintended ram movement, e.g. using blocking devices

Definitions

  • the invention relates to a press of the type specified in the preamble of claim 1.
  • DE-OS 20 45 894 describes a hydraulic drawing press with locking devices for several plungers.
  • the locking devices consist of racks and locking claws encircling their toothing.
  • the plungers of displaceably mounted locking claws can be moved using hydraulic actuating means. The disengagement from the connection with the racks takes place against a mechanical return spring. A lowering movement of the plunger is required to ensure that it engages properly. The locked position is not secured.
  • US Pat. No. 4,304,540 Another device for securing the ram of a press is shown in US Pat. No. 4,304,540.
  • the ram of the press is secured in several ways.
  • pressure rods are rigidly connected to the plunger, which are guided through press-fitted housings which serve to receive and move the locking bolts.
  • the locking bolts can be guided radially against the push rod in guide means by means of adjusting means.
  • Each push rod has grooves in the locking areas, into which the locking bolts can engage with correspondingly designed areas.
  • the locking bolts are secured against movement from the locking position via a common cone ring.
  • Each locking device requires a large number of adjusting means for performing the functions and it is necessary to lift the plunger into a precisely predetermined position so that the shape areas on the locking bolts match the height of the shape areas, grooves, on the locking bars.
  • the invention is based on the DD-A3-226 147, which shows a press with a ram that can be removed and stored.
  • Locking devices are provided for the plunger between press-fixed areas and the plunger. Each locking device has a locking rod with a circumferential groove in the manner of a thread.
  • the locking bar is attached to the press.
  • Locking bolts which are movable in their longitudinal axis and which are designed in accordance with the groove shape, interact with the groove via adjusting means. If the groove and locking bolt do not match, the locking rod must be turned. The locking position is secured by the locking bolt and the connecting lugs actuating the locking bolt being in the extended position (dead center position).
  • the position of the plunger can be locked without having to change the position of the plunger to achieve the positive locking required for the locking.
  • the movable components of the locking device must be fixed in a press (frame) manner.
  • the downward and upward movements of the plunger and the movement of the locking bars are not in one direction of movement when the locking position is found. It is also essential to the invention that the movements of the locking bars towards the locking bar, the locking in this position, the movement away from the locking bar and the locking of the locking bars in the position releasing the locking bar are achieved by a single curve piece acting on all locking bars of a locking device will. Due to the freely movable mounting of the locking bolts in the directions of movement transverse to the lowering and lifting movement of the plunger, the plunger can be securely secured in spite of movement movements which cannot be avoided.
  • Fig. 1 shows a two-column press with a head piece 2, a ram 3 which is mounted in guides and via a drive, of which two connecting rods 6 can be seen, up and down in the direction of the double arrow 4 and a press table 7.
  • locking devices 8 which act on one, all common servomotor or, as shown, individual servomotors 12 on a locking rod 9 on the plunger 3.
  • Fig. 2 only one half of a locking device is shown, since the housing 13, the housing cover 14, a worm wheel 37, a locking guide 17 and a cam ring 29 in this embodiment, like the locking rod 9, are rotationally symmetrical components. With this construction, a plurality of locking bolts 23 can be guided against the locking rod 9 at the same time. However, it is also envisaged for an embodiment using a helical rack and linear movement of a double curve corresponding to the cam ring 29.
  • the worm wheel 37 is rotatably inserted into the housing 13, which is kept closed by the housing cover 14.
  • the worm wheel 37 can be driven by the servo motor 12 to the left and to the right by means of a worm.
  • the cam ring 29 is carried here via a driver 38, which serves as a compensating clutch and in the rubber-elastic middle part cylindrical pins 39 are inserted, which engage in a groove 41 in the worm wheel 37 and in the cam ring 29.
  • the cam ring 29 has, as is also shown in FIGS. 3a to 3e, a first control curve 31, a second control curve 32 and an annular groove 35 with the end faces 36 as contact surfaces.
  • a bolt guide 17 is rotatably mounted in the housing cover 14. Between the housing cover 14 and the bolt guide 17 there is a catch-like anti-rotation lock with a catch 19 which engages in a recess 18 in the bolt guide 17 under the pressure of a spring 21, which is supported in a closure piece 22.
  • the bolt guide 17 serves for the radial guidance of a number, for example three locking bolts 23.
  • the locking bolts 23 are movably mounted in the bolt guide 17 in the direction of the locking rod 9 and away from it.
  • Bolt guide 17 and cam ring 29 also allow the locking bolts 23 to move sideways in accordance with the directions of movement indicated by the two double arrows 30 in FIG. 3b, in order to compensate for inaccuracies in the delivery of the locking rod 9 as a result of a more or less large play in the ram guide.
  • each locking bolt 23 a longitudinal bore 26 is made in the direction of the movement of the locking bolt 23 against the locking rod 9.
  • a curve follower piece 28 is inserted, which is constantly pressed under the pressure of a spring 27 against the first control cam 31.
  • the locking bolt 23 is preloaded in the direction of the locking rod 9.
  • a pin 33 is further inserted, which cooperates with the second cam 32 on the cam ring 29, and a cylinder pin 34, which engages in the annular groove 35 and comes to rest on one of the end faces 36 when the cam ring 29 rotates the or the locking bolt 23.
  • Arrow 16 indicates the bore in the housing cover 14 and the cylindrical housing 13.
  • the toothings on locking rod 9 and locking bolt 23 are indicated by 11 and 24, respectively.
  • the toothing itself can be a movement thread, for example a trapezoidal or saw thread.
  • the locking bolts 23 can be segments which have been cut out of a nut which has the same thread as the locking rod 9.
  • a locking rod 9 is indicated with a movement thread 11.
  • Three locking bolts 23 are also indicated, which are placed against the outer jacket of the locking rod 9. This representation corresponds to the phase in which the locking bolts 23 are to be rotated in a horizontal plane around the locking rod 9 in order to be able to engage in the groove or the threads on the locking rod 9.
  • FIGS. 3a to 3e The locking process for securing the raised position of the plunger 3 in the individual phases is shown in FIGS. 3a to 3e.
  • FIG. 3a shows the unlocked state.
  • the locking bolt 23 is prevented from moving by the spring 27 against the locking rod 9 by the cylindrical pin 33 on the second control cam 32. If the cam ring 29 is now moved in the direction of the arrow 44, the cylinder pin 33 is released from the second control cam 32 and the locking bolt 23 is guided against the locking rod 9 under the pressure of the spring 27 when the cam follower piece 28 bears against the first control cam 31.
  • locking bars 23 generally initially rest against the locking bar 9, as is also shown in FIG. 5a.
  • the catch 19 prevents the locking bar guide 17 and thus the locking bar 23 from rotating about the locking rod 9.
  • the length of the annular groove 35 (FIG.
  • each locking bolt 23 is rotated under contact with the locking rod 9 as a result of the pressure action of the spring 27 and the rotary movement of the worm wheel 37, cam ring 29 and locking guide 17 until the teeth of the locking bolts 23 match the gears of the locking rod 9.
  • each locking bolt 23 is further adjusted by means of the pressure of the spring 27 before and in which or the gears of the locking rod 9, shown in FIGS.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Punching Or Piercing (AREA)

Claims (5)

  1. Presse comportant au moins un coulisseau (3) et une table de presse (7) agencée pour recevoir des outils, un entraînement (6) du coulisseau (3) mobile en va-et-vient vertical, et des dispositifs de blocage (8) disposés entre des parties fixes de la presse et chaque coulisseau (3) pour assurer chaque coulisseau (3) contre un abaissement non commandé, chaque dispositif de blocage (8) comportant une barre de blocage (9) entourée d'une rainure périphérique (10) semblable à un filetage et des verrous (23) ainsi que des moyens de commande (12) pour avancer et reculer les verrous (23) et des moyens (29) pour assurer la position de blocage des verrous (23), les verrous (23) ayant, sur la largeur de leurs zones s engageant dans la rainure périphérique (10) de la barre de blocage (9), une forme qui correspond au pas et à la forme de cette rainure (10), caractérisée en ce que les barres de blocage (9) des dispositifs de blocage (8) sont fixées rigidement au coulisseau (3) et en ce qu'un ou, le cas échéant, plusieurs verrous (23) montés sur les parties fixes de la presse sont agencés pour être actionnés par un moyen de commande (12) commun, pour être appliqués contre le pourtour d'une barre de blocage (9) dans la position haute du coulisseau (3) et, dans cette position, être déplacés en rotation autour de la barre (9) par le moyen de commande (12) avant de s'engager dans la rainure périphérique (10) de cette barre (9).
  2. Presse comportant des boîtiers (13, 14) traversés chacun par une barre de blocage (9) et contenant des verrous (23) montés dans des moyens de guidage (17), caractérisé par les moyens suivants prévus dans chaque boîtier (13, 14) :
    un anneau à cames (29) qui est sensiblement coaxial par rapport à la barre de blocage (9) et qui peut tourner au moyen d'un servomoteur (12), cet anneau comportant :
       une première courbe de came (31) agencée pour déplacer les verrous (23) en direction de la barre (9) et pour verrouiller l'engagement du verrou (23) sur la barre (9), et
       une seconde courbe de came (32), assortie à la première (31), pour dégager les verrous (23) de la barre (9) et pour assurer leur position de retrait par rapport à la barre (9),
    un guide annulaire de verrous (17) qui est sensiblement coaxial à la barre de blocage (9) et peut tourner, ce guide contenant les verrous (23),
    et dans laquelle :
       au moins un blocage de rotation à encliquetage (19, 21, 22) est disposé entre le boîtier (13, 14), le guide de verrous (17) et des verrous (23) qui sont montés de manière à pouvoir se déplacer en direction de la barre (9) et s'en éloigner et comportent à cet effet :
       une première cheville cylindrique (33) agencée pour s'appuyer contre la seconde courbe de came (32),
       dans un trou borgne (26) s'étendant dans le sens du déplacement (30) en direction de la barre (9), un suiveur de came (28) et un ressort de compression (27) poussant le suiveur de came (28) contre la première courbe de came (31) et poussant ainsi le verrou (23) en direction de la barre (9), et en outre
       une seconde cheville cylindrique (34) qui est engagée dans une rainure annulaire (35) de l'anneau à cames (29) pour s'appuyer contre l'une ou l'autre des surfaces frontales (36) délimitant la rainure (35), en fonction du sens de rotation de l'anneau à cames (29).
  3. Presse selon la revendication 2, caractérisée en ce que l'anneau à cames (29) est entraîné en rotation par une roue à vis sans fin (37) entraînée par un moteur (servomoteur), et en ce qu'un organe d'entraînement (38, 39) à élément élastique en caoutchouc est utilisé comme accouplement compensateur pour transmettre le mouvement de la roue à vis sans fin (37) à l'anneau à cames (29).
  4. Presse selon la revendication 2, caractérisée en ce que chaque verrou (23) est monté dans le guide de verrous (17) de manière librement mobile en direction de la barre de blocage (9) et dans le sens opposé, ainsi que dans une direction (30) perpendiculaire à celle-ci et perpendiculaire au mouvement relatif (4) entre la barre (9) et le verrou (23).
  5. Presse selon la revendication 2, caractérisée en ce que les verrous (23) de chaque dispositif de blocage (8) sont des segments fabriqués par usinage d'un écrou fileté dont le filetage correspond au filetage formé par la rainure périphérique (10) de la barre de blocage (9).
EP88117287A 1987-11-03 1988-10-18 Presse avec organes de blocage pour coulisseau Expired - Lifetime EP0314975B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873737197 DE3737197A1 (de) 1987-11-03 1987-11-03 Presse mit verriegelungseinrichtungen fuer den stoessel
DE3737197 1987-11-03

Publications (2)

Publication Number Publication Date
EP0314975A1 EP0314975A1 (fr) 1989-05-10
EP0314975B1 true EP0314975B1 (fr) 1992-05-20

Family

ID=6339637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117287A Expired - Lifetime EP0314975B1 (fr) 1987-11-03 1988-10-18 Presse avec organes de blocage pour coulisseau

Country Status (3)

Country Link
EP (1) EP0314975B1 (fr)
BR (1) BR8805658A (fr)
DE (2) DE3737197A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538403C2 (de) * 1995-10-14 1999-05-12 Mueller Weingarten Maschf Presse mit einer Verriegelungseinrichtung für einen Pressenstößel

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5713237A (en) * 1996-10-30 1998-02-03 Clearing Niagara, Inc. Slide lock for stamping press
ITMC980062A1 (it) * 1998-06-12 1999-12-12 Renzo Cipriani Freno di stazionamento per presse meccaniche
DE19910965A1 (de) * 1999-03-12 2000-09-14 Mueller Weingarten Maschf Presse mit einer Verriegelungseinrichtung für Pressenstößel
DE102008009516A1 (de) 2008-02-15 2009-08-20 Herion Systemtechnik Gmbh Kupplungs-Bremskombination
DE202010001183U1 (de) 2010-01-19 2010-05-12 Josef Reuke Stahl- Und Maschinenbau Gmbh Sicherungsvorrichtung
DE102010005127B4 (de) 2010-01-19 2012-11-22 Josef Reuke Maschinenbau GmbH Sicherungsvorrichtung für Pressen, Presse und Verfahren zur Sicherung einer Presse
CN102966832B (zh) * 2012-10-26 2016-01-27 金丰（中国）机械工业有限公司 压力机二度落的检测装置及检测方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2252329A1 (de) * 1971-10-26 1973-05-03 Masaaki Uchida Presse mit grossem hub
DE2929676C2 (de) * 1979-07-21 1981-06-19 Hehl, Karl, 7298 Loßburg Formenschließeinheit einer Spritzgießmaschine
DD226147A3 (de) * 1983-02-18 1985-08-14 Guenter Koehler Einrichtung zur verriegelung des stoessels an pressen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538403C2 (de) * 1995-10-14 1999-05-12 Mueller Weingarten Maschf Presse mit einer Verriegelungseinrichtung für einen Pressenstößel

Also Published As

Publication number Publication date
DE3871330D1 (de) 1992-06-25
EP0314975A1 (fr) 1989-05-10
DE3737197A1 (de) 1989-05-18
BR8805658A (pt) 1989-07-18

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