EP0207930B1 - Dispositif de serrage pour outillage de presses - Google Patents

Dispositif de serrage pour outillage de presses Download PDF

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Publication number
EP0207930B1
EP0207930B1 EP86890184A EP86890184A EP0207930B1 EP 0207930 B1 EP0207930 B1 EP 0207930B1 EP 86890184 A EP86890184 A EP 86890184A EP 86890184 A EP86890184 A EP 86890184A EP 0207930 B1 EP0207930 B1 EP 0207930B1
Authority
EP
European Patent Office
Prior art keywords
piston
fixing
space
pinion
rack
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
EP86890184A
Other languages
German (de)
English (en)
Other versions
EP0207930A1 (fr
Inventor
Norbert Ing. Ribar
Herbert Dipl.-Ing. Dr. Techn. Tuppa
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.)
Simmering Graz Pauker AG
Original Assignee
Simmering Graz Pauker AG
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
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Application filed by Simmering Graz Pauker AG filed Critical Simmering Graz Pauker AG
Publication of EP0207930A1 publication Critical patent/EP0207930A1/fr
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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
    • B21J13/085—Accessories for handling work or tools handling of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams

Definitions

  • the invention relates to a clamping device for press tools, which has a displaceable and rotatable clamping piston in the press pressure plate for pivoting a tool clamping head (hammer head) and for tightening the same against the tool and has the aim of changing over, i.e. shorten the time required to replace a tool held on the base plate of the press slide by another.
  • a base plate usually carries one to three press rams.
  • the base plate is releasably attached to the upper spar or to the press cylinder; this connection should make it possible to adjust the base plate to the matrix of the floating table.
  • GB-A-3 973 427 discloses a device for lifting a press mold which consists of two hydraulically operated cylinders arranged in separate housings, the free ends of which engage the mold.
  • the cylinders are provided with a toothing running parallel to the longitudinal axis of the same, in each of which a pinion engages, the pinions being connected via a shaft, so that the movement of the cylinders takes place synchronously.
  • GB-A-1 132 826 shows a hydraulic overload protection device for a mechanical press, in which i.a. Piston and screw elements are used.
  • Piston and screw elements are used.
  • neither patent suggests any suggestion for the design of a tensioning device in which the locking and tensioning takes place automatically.
  • GB-A-2 019 277 discloses a tensioning device of the type mentioned at the outset, in which the tensioning piston can be actuated by a pinion located outside the cylinder, which rotates from a pneumatic or hydraulic cylinder via a chain.
  • the pinion and its drive mechanism require additional space and are also unprotected.
  • the space requirement of the clamping device should be so small that it can be installed in the usually existing pressure plate of a press, i.e. the conversion of existing presses should be possible; it should be possible to load the device with a crane or forklift.
  • the object of the present invention is, while avoiding the disadvantages of the known devices, to create a space-saving clamping device for press tools. This object is achieved by the measure according to the characterizing part of patent claim 1.
  • a continuous, multiply stepped bore 2 is provided in the pressure plate 1 of the press, not shown, which receives a piston (tensioning piston) 3 so that it can be displaced and rotated.
  • the bore 2 is closed by a pot-like cover 4, which carries a bearing bush 5 for the piston 3.
  • the cover 4 is pressed against the seat 7 by means of the screws 6, the edge 8 of the cover simultaneously closing the chamber for the seals 9.
  • the seal 9 separates the space 11 between the piston 3 and the cover 4 from the space 13 below the piston and surrounding the rod 12 of the piston 3 first (top) section 2a of the bore 2 lying stop ring 10 limited.
  • the rod 12 of the piston 3, whereby the piston 3 and the rod 12 can also be in one piece, is provided near the piston 3 with a thickening formed as a pinion 14; this pinion 14 is located in the second section 2b of the bore 2.
  • the rod 12 of the piston 3 also passes through the lowermost section 2c of the bore 2.
  • a seal 15 and a bearing and guide bush 16 are inserted into this.
  • a pressure ring 17 is pressed against the pressure plate 1 by means of screws 23, whereby the chamber for the seal 15 is closed.
  • the space 13 located under the piston 3 and accommodating the pinion 14 is thus closed at the bottom.
  • the piston rod 12 carries a hammer head 18 which is pulled against the piston rod 12 by a screw 19.
  • the anti-rotation device between the piston rod and hammer head is produced by means of the cross ribs 20.
  • Fig. 1 the tool plate 21 is shown with an opening 22 corresponding to the shape of the hammer head 18 for this.
  • the piston 3 For pivoting the hammer head and for tightening or loosening the same, the piston 3 must both be rotated and axially displaceable.
  • the space 11 is provided with a pressure medium connection 25, leading to the space 13 (in Fig. 1 only with under broken lines indicated) pressure medium connection 26.
  • the rack 27 is, as shown in Fig. 2, e.g. Part of a (cylindrical) piston (actuating piston) 28 which is displaceable in a cylinder (actuating cylinder) 29.
  • This cylinder 29 is inserted with an extension 30 guiding the rack 27 into a bore 31 which starts from a side surface 32 of the pressure plate 1 and also penetrates into the space 13 surrounding the pinion 14.
  • the cylinder 29 is held on the pressure plate 1 by means of the screws 33.
  • a pressure medium connection 34 is provided in the end wall of the cylinder 29.
  • the path of the piston 28 and thus the rack 27, corresponding to a rotation of the pinion 14 and the hammer head 18 by 90 °, is limited on the one hand by the end wall of the cylinder 29 and on the other hand by the bottom of the bore 31.
  • the space between the end wall of the cylinder 29 and the end face of the piston 28 is designated 35.
  • the pressure medium connections designated 25, 26 and 34 are connected via a line 36 (FIG. 3) through a line 39 and through a line 40 to control valves 41 and 42, respectively, which are not shown in any more detail include electrical control device.
  • electromagnets 43, 44 and 45 are provided, which e.g. can be excited by push buttons.
  • the pressure medium is drawn in by a pump 46 from a storage container 47 and fed to the valves 41, 42 via the lines 48, 49.
  • the return lines coming from the valves 41, 42 are designated 55 and 56.
  • connection 26 is pressurized, connection 34 is placed on the storage container 47, i.e. the slide of the valve 42 is in the position shown and port 25 is blocked by moving the slide of the valve 41 to the left.
  • the piston 3, which must take its lowest position, cannot be moved upwards, but the piston 28 is moved to the right and thus rotates the piston 3 and the hammer head 18 via the pinion 14. The latter thus comes from that position, in which he was able to penetrate the opening 22 in the tool plate 21, into a position pivoted through 90 °, in which the tool plate 21 can lie against the shoulders of the hammer head 18.
  • connection 26 is to be pressurized, the connections 25 and 34 are to be connected to the storage container, i.e. the valve 42 remains in its previous position (FIG. 3), the slide of the valve 41 is moved into its central position, as shown in FIG. 3.
  • the piston 28 remains in the position shown in Fig. 3, the piston goes up.
  • the port 34 is pressurized, the port 26 is connected to the reservoir 47 by moving the slide of the valve 42 to the right, and the port 25 remains blocked (slide of the valve 41 on the far left), then the piston 28 moves to the left and turns the hammer head 18 into the position in which it can penetrate the opening 22 (“unlocking”).
  • connection 34 is connected to the reservoir 47 in that the slide of the valve 41 is moved to the far right and the slide from the valve 42 assumes the position shown in FIG. 3.
  • the lower surface of the piston 3 is reduced by the cross section of the piston rod 12 compared to the upper piston surface; the piston 3 therefore goes down on both sides despite the same pressure and releases the hammer head 28 from the tool plate 18.
  • the piston 28 remains in the position shown in FIG. 3, the hammer head is therefore not rotated.
  • the slide of the valve 41 can be briefly shifted to the right in the present exemplary embodiment and then brought into the left end position, in which the slide is in the locked position.

Landscapes

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

Claims (6)

1. Dispositif de serrage destiné à des outils de presse, comportant un piston de serrage (3) coulissant et tournant dans la plaque d'appui (1) de la presse, pour faire pivoter une tête de serrage d'outil (tête de marteau) (18) et pour serrer celle-ci contre l'outil, caractérisé en ce qu'il est prévu sur la tige de piston (12) du piston de serrage (3), un pignon (14) coaxial à ce dernier, coopérant avec une crémaillère (27).
2. Dispositif selon la revendication 1, caractérisé en ce qu'avec un piston de serrage (3) coulissant et tournant hydrauliquement, le piston de serrage (3) et sa tige de piston (12) sont guidés coulissants et tournants dans la plaque d'appui (1) et en même temps rendus étanches.
3. Dispositif selon les revendications 1 et 2, caractérisé en ce que le pignon (14) est disposé entre le joint d'étanchéité (9) du piston de serrage (3) et le joint d'étanchéité (15) de la tige de piston (12).
4. Dispositif selon la revendication 2, caractérisé en ce que la crémaillère (14) est reliée à un piston d'actionnement (28) ou réalisée d'une pièce avec celui-ci, lequel coulisse dans un cylindre de travail (29).
5. Dispositif selon la revendication 4, caractérisé en ce que le volume (11) s'étendant au-dessus de la face frontale du piston de serrage (3), le volume (35) s'étendant au-dessus de la face frontale du piston d'actionnement (28) et le volume (13) entourant le pignon (14) et la crémaillère (27) faisant saillie par rapport au piston d'actionnement (28), sont pourvus chacun d'un branchement (25; 34; 26) menant à un dispositif de commande, pour un fluide sous pression.
6. Dispositif selon les revendications 1 et 2, caractérisé en ce que le guidage pour le coulissement et la rotation est formé par le même support (5 et 16) qui se trouve au droit des joints d'étanchéité (9 ou 15) fermant le volume (13).
EP86890184A 1985-07-01 1986-06-19 Dispositif de serrage pour outillage de presses Expired EP0207930B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0194885A AT382095B (de) 1985-07-01 1985-07-01 Spanneinrichtung fuer pressen-werkzeuge
AT1948/85 1985-07-01

Publications (2)

Publication Number Publication Date
EP0207930A1 EP0207930A1 (fr) 1987-01-07
EP0207930B1 true EP0207930B1 (fr) 1989-07-26

Family

ID=3524503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890184A Expired EP0207930B1 (fr) 1985-07-01 1986-06-19 Dispositif de serrage pour outillage de presses

Country Status (3)

Country Link
EP (1) EP0207930B1 (fr)
AT (1) AT382095B (fr)
DE (1) DE3664578D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026827C2 (de) * 1990-08-24 1998-11-05 Schloemann Siemag Ag Befestigungsvorrichtung zur lösbaren Verbindung von Werkzeug und Werkzeugträger einer Stauchpresse
DE4309236A1 (de) * 1993-03-23 1994-09-29 Schuler Gmbh L Drehspanner zum Ver- und Entriegeln von Ausbauen-/Austauschteilen, wie Werkzeuge, Greiferschienenteilstüücke u. dgl.
DE10032089A1 (de) * 2000-03-30 2001-10-04 Schumag Ag Werkzeughalter sowie Anordnung aus Werkzeughalter und Werkzeug

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2019277A (en) * 1978-04-18 1979-10-31 Sallander H Fastening device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3329250A (en) * 1965-03-02 1967-07-04 May Pressenbau Gmbh Overload safety device for presses
DE2045894A1 (de) * 1970-09-17 1972-03-23 G. Siempelkamp & Co, 4150 Krefeld Ziehpresse
FR2313151A1 (fr) * 1975-06-02 1976-12-31 Komatsu Mfg Co Ltd Mecanisme d'echange de matrices pour presses

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2019277A (en) * 1978-04-18 1979-10-31 Sallander H Fastening device

Also Published As

Publication number Publication date
DE3664578D1 (en) 1989-08-31
ATA194885A (de) 1986-06-15
AT382095B (de) 1987-01-12
EP0207930A1 (fr) 1987-01-07

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