EP0330258B1 - Dispositif pour cambrer un outil d'une presse à plier - Google Patents

Dispositif pour cambrer un outil d'une presse à plier Download PDF

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Publication number
EP0330258B1
EP0330258B1 EP89200337A EP89200337A EP0330258B1 EP 0330258 B1 EP0330258 B1 EP 0330258B1 EP 89200337 A EP89200337 A EP 89200337A EP 89200337 A EP89200337 A EP 89200337A EP 0330258 B1 EP0330258 B1 EP 0330258B1
Authority
EP
European Patent Office
Prior art keywords
adjusting
tool
wedges
adjusting wedges
lower beam
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
EP89200337A
Other languages
German (de)
English (en)
Other versions
EP0330258A1 (fr
Inventor
Cornelis Hendricus Liet
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
Priority to AT89200337T priority Critical patent/ATE63070T1/de
Publication of EP0330258A1 publication Critical patent/EP0330258A1/fr
Application granted granted Critical
Publication of EP0330258B1 publication Critical patent/EP0330258B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0272—Deflection compensating means

Definitions

  • the invention relates to apparatuses for cambering a tool of a bending apparatus according to the preamble of claim 1 and claim 2.
  • Such apparatuses serve for adjusting a compensation for the deflection of the upper beam at high loads occurring in a bending apparatus.
  • a known apparatus usually a high number of adjusting elements along the length of the tool are provided which only provide a local support of the tool (see DE-A-17 52 346). Further for adjusting a desired camber all adjusting elements have to be adjusted accurately. As moreover all adjusting elements have a different shape or design and must be made with a relatively high accuracy, the manufacturing costs of the known apparatus are high.
  • EP-0 067 766 discloses an apparatus according to the preamble of claim 1 and claim 2.
  • one of the adjusting wedges is moveable in a direction transverse to their longitudinal direction.
  • actuating means for moving the movable adjusting wedges are required along the length of this wedge.
  • the joining complementary surfaces of the wedges are shaped in a complicated manner.
  • the invention aims to provide apparatuses of this type which are simple and can be made at relatively low cost.
  • one adjusting wedge is mounted stationary and the other adjusting wedge is slidable.
  • both adjusting wedges each consist of two or more adjusting wedge parts connected to each other, wherein the curved complementary surfaces of the subsequent adjusting wedge parts are staggered in vertical direction.
  • the mechanical manufacturing of the adjusting wedges becomes simple if the adjusting wedges are made of a relatively soft steel, wherein the movable surfaces of the adjusting wedge(s) are provided with a bronze layer.
  • the adjusting wedges are mounted on the lower beam and are received in a recess in the lower side of the tool table.
  • Fig. 1 shows a bending apparatus 1 comprising a stationary lower beam 2, on which a tool table 3 is mounted. A die 4 is fixed on the tool table 3.
  • the bending apparatus 1 further comprises an upper beam 5 movable up and down and driven by two cylinder piston assemblies 6.
  • sensors 7 are mounted near the cylinder piston assemblies 6, only one of the sensors being shown in fig. 1.
  • Said sensors 7 are supported by substantially C-shaped supports 8 fully free of the frame of the bending apparatus 1, so that a deformation of the web plates 9 (only one of which is shown in fig. 1) during exertion of high forces does not affect the sensors 7.
  • the upper beam 5 carries a stamp 10 which cooperates with the die 4 for bending a material plate.
  • the stamp 10 or the die 4 With an opposite bending-through is generally indicated as camber. With a correct adjustment of the camber, a straight bending line is obtained during the bending operation.
  • the bending apparatus 1 For adjusting the camber the bending apparatus 1 is provided with a camber apparatus 11 comprising two adjusting wedges 12, 13 disposed upon eachother and further shown in figs. 2-5.
  • the adjusting wedges 12, 13 are mounted on the lower beam 2, wherein a recess 14 is provided in the lower side of the tool table 3, in which recess the adjusting wedges 12, 13 are received.
  • the tool table 3 is connected to the lower beam 2 under spring pressure, for which purpose in the shown embodiment three lateral rods 15 are mounted near the ends of the tool table 3 and in the centre of the lower beam 2, respectively, which lateral rods protrude outwardly of the lower beam 2 on both sides.
  • Draw bolts 16 protrude through each lateral rod 15 on both sides of the lower beam 2, by means of which draw bolts 16 the tool table 3 is fixed, wherein Belleville- washers or cupped spring washers 18 are provided between each bolt head 17 and the lateral rods 15.
  • the adjusting wedges 12, 13 are slidable with respect to eachother in longitudinal direction, in that at the embodiment shown the upper wedge 12 is slidable backward and forward, while the lower adjusting wedge 13 is attached to the lower beam 2.
  • the actuation of the adjusting wedge 12 is provided through a draw/push bolt 19 which is movable backward and forward through a 90° transmission 20 by rotating a shaft 21 of the transmission 20.
  • the shaft 21 can be rotated with a manually operable adjusting wheel or alteratively by means of an electromotor.
  • the adjusting wedges 12, 13 are shown in a neutral position, wherein the upper surface 22 of the adjusting wedge 12 extends parallel to the lower surface of the adjusting wedge 13 and therefore no correction of the bending-through of the upper beam or the stamp 10, respectively, takes place.
  • the upper surface 22 should be provided with a bending-through opposite to the bending-through of the upper beam 5, which opposite bending-through can be indicated as camber curve.
  • the adjusting wedge has been moved maximum to the left, whereby the upper surface 22 has the maximum opposite bending-through, which is indicated strongly exaggerated in fig. 5 by a dashed line 24 with respect to a straight line 25.
  • the maximum bending-through for a length of the adjusting wedges of 3 m is approximately 1 mm.
  • the desired bending-through of the upper surface 22 of the adjusting wedge 12 for compensating the bending-through of the upper beam 5 is obtained in that the joining complementary surfaces 26, 27 in the side view of figs. 4 and 5 has a somewhat S-shaped curved trend, wherein the highest point 28 and the lowest point 29 of the curved surfaces 26, 27 in the neutral position of fig. 4 lies substantially at the location of the respective sensors 7.
  • the trend of the curved surfaces 26, 27 substantially corresponds with the integral of the camber curve 24 shown in fig. 5.
  • both adjusting wedges 12, 13 can for example consist of two interconnected adjusting wedge parts 30, 31 and 32, 33, respectively, wherein the curved complementary surfaces 26, 27 of the subsequent adjusting wedge parts 30, 31 and 32, 33, respectively, are staggered in vertical direction as shown in figs. 6, 7.
  • the described camber apparatus 11 shows the advantage that the adjusting wedges 12, 13 extend along the whole length of the die 4 to be cambered, so that the support of the tool table 3 and thereby of the die 4 is provided along substantially the whole length.
  • the operation of the camber apparatus 11 is very simple. Further the manufacturing of the adjusting wedges 12, 13 is not very complicated so that the manufacturing costs are relatively low.
  • camber apparatus is mounted on the lower beam, it is of course also possible to incorporate the camber apparatus in the upper beam. Further only the lower adjusting wedge 13 or both adjusting wedges 12, 13 could be movable instead of the upper adjusting wedge 12.
  • the adjusting wedges 12, 13 are made of relatively soft steel, whereby the mechanical machining of the curved surfaces 26, 27 is relatively simple.
  • the surfaces 22 and 26 of the movable adjusting wedge 12 are provided with a layer of bronze.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (9)

1. Appareil pour cambrer un outil (4; 10) d'une machine de pliage (1) comportant une poutre inférieure (2), une table (3) d'outil montée sur cette poutre et une poutre supérieure (5) pouvant monter et descendre et reliée, à proximité de ses extrémités, à des capteurs (7) destinés à mesurer le mouvement de la poutre supérieure, ledit appareil comportant deux coins de réglage (12, 13) disposés l'un sur l'autre et mobiles l'un par rapport à l'autre à partir d'une position neutre, lesdits coins de réglage s'étendant sensiblement sur toute la longueur de l'outil entre celui-ci et la poutre supérieure ou inférieure correspondante, caractérisé en ce que les coins de réglage (12, 13) sont mobiles l'un par rapport à l'autre dans leur direction longitudinale, et en ce que les surfaces complémentaires jointives (26, 27) des coins de réglage ont, en coupe longitudinale, un profil incurvé sous la forme d'un S s'étendant sur son côté, et dans lequel, dans la position neutre, les points le plus haut et le plus bas (28, 29), respectivement, des surfaces incurvées des coins de réglage sont situés sensiblement à l'emplacement des capteurs respectifs (7).
2. Appareil pour cambrer un outil (4; 10) d'une machine de pliage (1) comportant une poutre inférieure (2), une table (3) d'outil montée sur celle-ci et une poutre supérieure (5) pouvant monter et descendre et reliée, à proximité de ses extrémités, à des capteurs (7) destinés à mesurer le mouvement de la poutre supérieure, ledit appareil comportant deux coins de réglage (12, 13) disposés l'un sur l'autre et mobiles l'un par rapport à l'autre à partir d'une position neutre, lesdits coins de réglage s'étendant sensiblement sur toute la longueur de l'outil entre celui-ci et la poutre supérieure ou inférieure correspondante, caractérisé en ce que les deux coins de réglage (12, 13) sont constitués de deux ou plus de deux parties de coins de réglage (30, 31; 32, 33) reliées entre elles, les coins de réglage (12, 13) étant mobiles l'un par rapport à l'autre dans leur direction longitudinale, en ce que les surfaces complémentaires jointives (26, 27) des parties des coins de réglage ont chacune, en coupe longitudinale, un profil incurvé sous la forme d'une section d'un S s'étendant sur son côté, les surfaces complémentaires incurvées de parties des coins de réglage successives (30, 31; 32, 33) étant décalées dans la direction verticale, et dans lequel, dans la position neutre, les points le plus haut et le plus bas (28, 29), respectivement, des surfaces incurvées des coins de réglage sont situés sensiblement à l'emplacement des capteurs respectifs (7).
3. Appareil selon la revendication 1 ou 2, caractérisé en ce qu'un coin (13) de réglage est monté de façon fixe et en ce que l'autre coin (12) de réglage est coulissant.
4. Appareil selon la revendication 3, caractérisé en ce que les points le plus haut et le plus bas (28, 29) de la surface supérieure (27) du coin de réglage inférieur (13) s'étendent à une distance, vers l'extérieur des capteurs (7), correspondant sensiblement à la moitié de la course du coin coulissant (12) de réglage.
5. Appareil selon l'une quelconque des revendications précédentes, caractérisé en ce que les coins (12, 13) de réglage sont réalisés en acier relativement doux, les surfaces mobiles du coin ou des coins de réglage étant pourvues d'une couche de bronze.
6. Appareil selon l'une quelconque des revendications précédentes, dans lequel l'outil (4) supporté par la table (3) d'outil est cambré, caractérisé en ce que les coins (12, 13) de réglage sont montés sur la poutre inférieure (2) et sont reçus dans un évidement (14) situé dans le côté inférieur de la table d'outil.
7. Appareil selon la revendication 6, caractérisé en ce que le coin fixe (12, 13) de réglage est formé par le côté inférieur de la table (3) d'outil ou le côté supérieur de la poutre inférieure (2), respectivement.
8. Appareil selon la revendication 6 ou 7, caractérisé en ce que la table (3) d'outil est reliée a la poutre inférieure (2) sous la pression de ressorts.
9. Appareil selon la revendication 8, caractérisé en ce que la table (3) d'outil est reliée à la poutre inférieure (2) au moins à proximité des extrémités et à proximité du centre par des tirants (16), des ressorts (18) étant montés entre la tête (17) de chaque tirant (16) et la face d'arrêt coopérante (15) de la poutre inférieure.
EP89200337A 1988-02-24 1989-02-10 Dispositif pour cambrer un outil d'une presse à plier Expired - Lifetime EP0330258B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89200337T ATE63070T1 (de) 1988-02-24 1989-02-10 Vorrichtung zum woelben eines biegepresswerkzeuges.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8800462A NL8800462A (nl) 1988-02-24 1988-02-24 Inrichting voor het bomberen van een werktuig van een buiginrichting.
NL8800462 1988-02-24

Publications (2)

Publication Number Publication Date
EP0330258A1 EP0330258A1 (fr) 1989-08-30
EP0330258B1 true EP0330258B1 (fr) 1991-05-02

Family

ID=19851842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89200337A Expired - Lifetime EP0330258B1 (fr) 1988-02-24 1989-02-10 Dispositif pour cambrer un outil d'une presse à plier

Country Status (6)

Country Link
EP (1) EP0330258B1 (fr)
AT (1) ATE63070T1 (fr)
DE (1) DE68900067D1 (fr)
ES (1) ES2022745B3 (fr)
GR (1) GR3001930T3 (fr)
NL (1) NL8800462A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8901560A (nl) * 1989-06-21 1991-01-16 Wila Maschf Bv Kantpers en een automatische bombeerinrichting daarvoor.
CH680772A5 (fr) * 1989-09-11 1992-11-13 Beyeler Machines Sa
US6290401B1 (en) * 1999-04-26 2001-09-18 Corning Incorporated Automated chip/phaser holder
FR2804048B1 (fr) * 2000-01-21 2002-05-03 Amada Europ Sa Dispositif de reglage en hauteur d'une pluralite de porte-outils pour presse plieuse
US6725702B2 (en) 2001-10-26 2004-04-27 Ariel Financing Ltd. Apparatus and method for overcoming angular deviations in a workpiece
WO2003039777A1 (fr) * 2001-11-09 2003-05-15 Ariel Financing Ltd. Appareil et procede permettant de vaincre des deviations angulaires dans une piece a travailler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR783147A (fr) * 1934-03-05 1935-07-08 Weingarten Vorm Hch Schatz Ag Plieuse-cintreuse
DE1452677A1 (de) * 1964-01-16 1969-04-24 Robert Heitmann Vorrichtung zum Ausgleich der Durchbiegung bei Pressen,insbesondere Abkantpressen
DE1752346C3 (de) * 1968-05-11 1974-09-12 Scharringhausen Maschinenbau Gmbh, 7526 Rheinsheim Bombiervorrichtung für eine Abkantpresse
DE2534664A1 (de) * 1975-08-02 1977-02-10 Fastenrath Fasti Werk Vorrichtung zum konvexen durchbiegen von werkzeugschienen an abkantpressen oder schwenkbiegemaschinen
DE2914744A1 (de) * 1979-04-11 1980-10-30 Weinbrenner Paul Maschbau Bombiereinrichtung fuer eine abkantpresse o.dgl.
FR2507507B1 (fr) * 1981-06-16 1986-07-04 Promecan Sisson Lehmann Dispositif de bombage d'un porte-outil d'une presse plieuse ou analogue

Also Published As

Publication number Publication date
GR3001930T3 (en) 1992-11-23
ES2022745B3 (es) 1991-12-01
DE68900067D1 (de) 1991-06-06
EP0330258A1 (fr) 1989-08-30
NL8800462A (nl) 1989-09-18
ATE63070T1 (de) 1991-05-15

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