EP0576964A1 - Presse à découper et à déformer avec un ou plusieurs vérins d'entraînement et à genouillère - Google Patents

Presse à découper et à déformer avec un ou plusieurs vérins d'entraînement et à genouillère Download PDF

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Publication number
EP0576964A1
EP0576964A1 EP19930109915 EP93109915A EP0576964A1 EP 0576964 A1 EP0576964 A1 EP 0576964A1 EP 19930109915 EP19930109915 EP 19930109915 EP 93109915 A EP93109915 A EP 93109915A EP 0576964 A1 EP0576964 A1 EP 0576964A1
Authority
EP
European Patent Office
Prior art keywords
press
cutting
ram
press ram
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.)
Granted
Application number
EP19930109915
Other languages
German (de)
English (en)
Other versions
EP0576964B1 (fr
Inventor
Ulrich Verhoefen
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0576964A1 publication Critical patent/EP0576964A1/fr
Application granted granted Critical
Publication of EP0576964B1 publication Critical patent/EP0576964B1/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
    • 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
    • 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
    • B30B1/16—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 fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • 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 cutting and forming press with one or more drive cylinders and an articulated lever drive for a press ram, in which the drive cylinder (s) is or are connected to a bridge, with two height-adjustable threaded spindles which are guided through a press stand and have ends at their ends Position the attached bearing blocks to link the articulated lever drive within the press ram.
  • Such a cutting and forming press with a hydromechanical articulated lever drive is known from EP-B 0 283 532.
  • the drive cylinder for the press ram is carried by a bridge construction arranged in the stand between lateral guides, via a bridge construction connected to it by threaded spindles or other height-adjustable means, which is supported within the area of the free space of the frame-shaped press stand.
  • the bridge construction connects the bearing axles, which are arranged symmetrically on both sides to the press center position, and receives a center guide for the piston rod through a first hinge point.
  • the two bearing axles form, with further subsequent articulation points, a rigid, pivotable triangle, the articulation point of which is directed towards the center of the press ram and leads to the first articulation point which is movable in the direction of the center guide, via at least two drive lever parts coupled via a second articulation point.
  • the second hinge point leads into a separate curve in the lower area of the center guide and the hinge points of the triangle are connected to the press ram by a continuing lever part.
  • EP-B 0 250 610 describes an articulated lever, cutting and forming press consisting of a single or multiple press stand and described at least one generally closed, frame-shaped press ram which is connected to the pressure medium cylinder drive, in each case between two symmetrically identical articulated lever systems that bend with their joints toward the center of the press.
  • the piston of the pressure medium cylinder drive is connected with the end of its piston rod to the multi-joint support guided in the press stand, on which at least two links are movably arranged, which in turn are height-adjustable on the press frame and are pivotally mounted in the press ram towards the press table.
  • the relationship applies to the pressure medium cylinder drive that the stroke of the piston is equal to the path of the multi-joint, possibly less the stroke of the press ram.
  • This design creates a certain type of press, namely a so-called “differential travel press” , which is to be further developed in such a way that the working area of the press ram can be set within relatively wide limits, regardless of the ram stroke, with unrestricted maintenance of the ram guide, and that the stand construction is the suspension of the press stand minimized to zero in the interest of high cutting accuracy.
  • the press stand is a two-stand frame which is partially closed on the front and end sides, that synchronously driven spindles, which are carried by threaded guides formed in the upper crossmember of the press stand, end in the spindle bearings formed on both sides of the press stand, which are provided on the press stand and are adjustable in height, and that the guide crossbeams are provided on their underside with spherical bearings for the hanging arrangement of the pairs of pivot levers connected to the press ram.
  • the press ram is frame-shaped and connected directly to the pressure medium cylinder drive, as is required for differential travel presses.
  • DE-C 29 25 416 discloses a cutting press with a pressure medium cylinder drive between two, with its knee joints bent towards the press center and arranged symmetrically to the same toggle lever systems, the pistons of which The end of its piston rod engages the connecting joint of two links, which are articulated at their other ends to the toggle lever systems, the connecting joint with the help of the press stand having a guide transverse to the direction of the piston rod.
  • the pressure medium cylinder drive is supported directly on the press ram, the cylinder being fastened to the press ram.
  • the press ram is designed as a frame in which, among other things, the pressure medium cylinder drive can be attached.
  • the object of the invention is to improve a cutting and forming press of the type described at the outset so that the press ram, with a lighter design than known press rams, experiences a lower ram misalignment with eccentric ram loading, and thus the ram deformation can be kept very low.
  • This object is achieved in such a way that a multi-joint carrier connected to the piston rod of the drive cylinder is guided in the press ram.
  • the press ram is open in the direction of the drive cylinder and it slides with its laterally closed surfaces along guides which are fixed in position on the inside and near the corners of the press stand. Furthermore, slide plates are arranged parallel to the longitudinal side walls of the press ram in its interior and each slide plate has a central guide for the multi-joint carrier and is supported in the press ram.
  • a continuous floor extending above the articulation point of the connecting rod articulated on the tappet gives the tappet a very high torsional stiffness.
  • the central guides are designed as grooves in the sliding plates.
  • the advantages of the invention are that a smaller tilting moment is transmitted to the press ram than in the case of known cutting and forming presses. Furthermore, the press ram is rigid in itself.
  • the closed and ribbed side walls practically do not deform, in contrast to the known frame-shaped tappets whose sides spring through and which deform in parallelogram-like manner when the tappet is loaded eccentrically.
  • the slide plates in the plunger inside, in which the guides of the piston rod end are attached reduce the tilting moment acting on the plunger due to their reaction forces acting on the plunger, especially when the plunger is eccentrically loaded, and thus additionally reduce its misalignment. In addition, there is no need to adjust the relative position of piston rod guides to the tappet.
  • the free horizontal force acting on the ram is compensated by the multi-joint supports in the press ram.
  • the ram is force-balanced in the horizontal direction at all times and for every bearing of the eccentric press load. Therefore, no free transverse forces act on the ram.
  • the tipping moment acting on the ram is reduced when the press is off-center.
  • the slide of the ram along guides automatically aligns the multi-link bracket to the engine. The ram can be lifted smoothly without additional effort. This is also the case after any repairs or revisions.
  • the tappet which is open at the top and closed on all sides, does not deform, particularly if it is provided with an intermediate floor. There is no additional misalignment of the punch and die.
  • the plunger which surrounds the engine on all sides, particularly prevents dirt and lubricating oil from entering the engine. In addition, for structural reasons, the ram offers a much greater depth of the clamping surface for the upper part of the tool.
  • the cutting and forming press shown in FIGS. 1 and 2 has a press stand 1, which in outline consists of a yoke-shaped part and a wall that closes off this yoke-shaped part (cf. FIG. 2).
  • a press stand 1 which in outline consists of a yoke-shaped part and a wall that closes off this yoke-shaped part (cf. FIG. 2).
  • Two height-adjustable threaded spindles 3, 3 and a drive cylinder 17 are passed through the press stand 1.
  • the drive cylinder 17 is connected to an articulated lever drive 28 for a press ram 2.
  • bearing blocks 6, which are equipped with a joint, are arranged at the lower ends of the threaded spindles 3, 3. Due to the height adjustment of the threaded spindles 3, 3 within the press stand 1, the bearing blocks 6 are adjusted in height with their joints within the press ram 2, the respective position of the threaded spindles 3, 3 being determined by the thickness of the material or tools to be formed or cut. It should be noted that the threaded spindles 3, 3 are of course always positioned at the same height.
  • the two symmetrically formed branches of the articulated lever drive 28 are articulated on the joints of the bearing blocks 6.
  • Each of the two symmetrically formed branches consists of a first connecting rod 11, which is connected to a three-articulated lever 10, and a second connecting rod 13, which is articulated on the one hand on a joint 8 of the three-articulated lever 10 and on the other hand on the press ram 12.
  • the first connecting rod 11 is connected via a joint 12 to a multi-joint carrier 16 on the one hand and via a joint 9 to the three-joint lever 10.
  • the second connecting rod 13 is articulated on the press ram. Above the articulation point of the connecting rod 13 articulated on the tappet, there is a continuous intermediate floor 30 which gives the tappet a very high degree of torsional rigidity.
  • the press ram 2 is open towards the top of the drive cylinder 17 and closed on all sides.
  • the closed lateral surfaces of the press ram 2 slide along guides 14, 15 (see FIG. 2), which are fixed in position on the inside near the corners of the press stand 1.
  • Sliding plates 18, 18 are arranged inside the press ram 2 and run parallel to the longitudinal side walls of the press ram 2.
  • Each of these sliding plates 18 has a guide 7 for the multi-joint carrier 16 in the middle and is supported in a fixed position in the press ram 2.
  • This type of guidance of the multi-joint carrier in the supported slide plates 18 ensures that the lateral forces of the multi-joint carrier 16 are absorbed without great tilting moment when the press ram is eccentrically loaded, so that the press ram is hardly skewed.
  • the multi-joint carrier connected to the piston rod 19 of the drive cylinder 17 is guided in this way to the press ram 2 in such a way that only a very small tilting moment is transmitted to the press ram even
  • the guides 7 in the sliding plates 18, 18 are designed as grooves.
  • the drive cylinder 17 is fastened to a bridge 5 which connects the two sliding plates 18, 18.
  • the press ram 2 is open at the top and, with its laterally closed surfaces, slides along guides 26 which are fixed in place on the inside of the press stand 1.
  • the guides 26 are arranged near the corners of the press stand 1 and are designed, for example, as angles which enclose the edges of the press ram 2 at an angle.
  • a drive cylinder 23 is connected with its piston rod 19 to a multi-joint carrier 20 which is guided in the press ram 2.
  • the two symmetrically formed branches of the articulated lever drive 28 are articulated on the multi-joint carrier 20.
  • Each of the two branches of the articulated lever drive is connected to the multi-articulated carrier 20 with a respective first connecting rod 11.
  • the first connecting rod 11 is articulated to a three-articulated lever 10 which is articulated on the one hand on the threaded spindle 3 and on the other hand on a second connecting rod 13 which is articulated on a pressing and cutting plate 29 of the press ram 2.
  • sliding blocks 22, 22, are guided in sliding block guides 24, 24, which are arranged in the middle of the longitudinal side walls of the press ram 2.
  • the drive cylinder 23 is seated on a bridge 4, which extends parallel to the long sides of the press ram 2 and has bearing blocks 21, 21 on its underside, which are connected to one another via struts 25.
  • the bridge 4, the bearing blocks 21, 21 and the struts 25 form a frame, on the narrow sides of which supports 27 are attached on the outside, which hold the frame within the press ram 2.
  • the bearing blocks 21, 21 arranged on the narrow sides of the bridge 4 are supported in the press ram 2 and run parallel to the multi-joint support 20 as already mentioned above, is attached or guided centrally in the press ram 2. Since the relatively heavy sliding plates are eliminated in this second embodiment, the drive of the press ram can be kept smaller in size than in the first embodiment with the sliding plates.
  • the sliding plates according to FIGS. 1 and 2 can be replaced by tie rods, in which case the multi-joint support is also guided directly, similar to the second embodiment according to FIGS. 3 and 4, in the press ram .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
EP19930109915 1992-06-22 1993-06-22 Presse à découper et à déformer avec un ou plusieurs vérins d'entraînement et à genouillère Expired - Lifetime EP0576964B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924220043 DE4220043C2 (de) 1992-06-22 1992-06-22 Schneid- und Umformpresse mit einem oder mehreren Antriebzylindern und einem Gelenkhebelantrieb
DE4220043 1992-06-22

Publications (2)

Publication Number Publication Date
EP0576964A1 true EP0576964A1 (fr) 1994-01-05
EP0576964B1 EP0576964B1 (fr) 1996-12-18

Family

ID=6461348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930109915 Expired - Lifetime EP0576964B1 (fr) 1992-06-22 1993-06-22 Presse à découper et à déformer avec un ou plusieurs vérins d'entraînement et à genouillère

Country Status (4)

Country Link
US (1) US5669297A (fr)
EP (1) EP0576964B1 (fr)
JP (1) JPH071191A (fr)
DE (2) DE4220043C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MXPA05001080A (es) * 2002-07-26 2005-10-05 Humdinger Inc Sistema de guia de ariete.
CN105082593B (zh) * 2015-09-07 2016-11-30 一重集团大连设计研究院有限公司 液压缸驱动机械多连杆伺服压力机
DE102015220981A1 (de) * 2015-10-27 2017-04-27 Mahle International Gmbh Vorrichtung zum Fügen mehrerer Funktionselemente auf einer Welle
CN107838347A (zh) * 2016-09-18 2018-03-27 北京机电研究所 一种封闭高度调节装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052370A (en) * 1979-06-23 1981-01-28 Leinhaas W Machine tool with a reciprocating tool carrier
DE3517492A1 (de) * 1984-11-05 1986-05-07 Werner Ing.(Grad.) 6460 Gelnhausen Leinhaas Kniehebel-blechschneidepresse, bestehend aus einem pressenstaender und einem pressenstoessel
EP0250610A1 (fr) * 1986-06-20 1988-01-07 E. Bruderer Maschinenfabrik AG Presse à genouillère, à découper et à déformer
EP0283532A1 (fr) * 1987-03-24 1988-09-28 Leinhaas, Werner, Ing.-grad. Presse à couper et déformer à entraînement à genouillère hydro-mécanique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US716319A (en) * 1899-06-16 1902-12-16 Samuel J Webb Compound-lever press.
US986809A (en) * 1910-02-02 1911-03-14 Chambersburg Eng Co Power-press.
GB804352A (en) * 1955-06-30 1958-11-12 William Frank Golding Improvements in or relating to power presses
DE2949966A1 (de) * 1979-12-12 1981-06-19 Werner Ing.(Grad.) 6460 Gelnhausen Leinhaas Presse o.ae. werkzeugmaschine
US4579031A (en) * 1984-09-04 1986-04-01 Tishken Products Co. Two cycle air cut-off press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2052370A (en) * 1979-06-23 1981-01-28 Leinhaas W Machine tool with a reciprocating tool carrier
DE3517492A1 (de) * 1984-11-05 1986-05-07 Werner Ing.(Grad.) 6460 Gelnhausen Leinhaas Kniehebel-blechschneidepresse, bestehend aus einem pressenstaender und einem pressenstoessel
EP0250610A1 (fr) * 1986-06-20 1988-01-07 E. Bruderer Maschinenfabrik AG Presse à genouillère, à découper et à déformer
EP0283532A1 (fr) * 1987-03-24 1988-09-28 Leinhaas, Werner, Ing.-grad. Presse à couper et déformer à entraînement à genouillère hydro-mécanique

Also Published As

Publication number Publication date
EP0576964B1 (fr) 1996-12-18
US5669297A (en) 1997-09-23
JPH071191A (ja) 1995-01-06
DE4220043C2 (de) 1996-05-30
DE59304788D1 (de) 1997-01-30
DE4220043A1 (de) 1993-12-23

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