EP0089904B1 - Flachbiegeeinrichtung - Google Patents

Flachbiegeeinrichtung Download PDF

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Publication number
EP0089904B1
EP0089904B1 EP83420042A EP83420042A EP0089904B1 EP 0089904 B1 EP0089904 B1 EP 0089904B1 EP 83420042 A EP83420042 A EP 83420042A EP 83420042 A EP83420042 A EP 83420042A EP 0089904 B1 EP0089904 B1 EP 0089904B1
Authority
EP
European Patent Office
Prior art keywords
blade
movable
edge
travel
bending
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
EP83420042A
Other languages
English (en)
French (fr)
Other versions
EP0089904A1 (de
Inventor
Alexis Pauzin
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
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 Individual filed Critical Individual
Priority to AT83420042T priority Critical patent/ATE17449T1/de
Publication of EP0089904A1 publication Critical patent/EP0089904A1/de
Application granted granted Critical
Publication of EP0089904B1 publication Critical patent/EP0089904B1/de
Expired 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
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/045—With a wiping movement of the bending blade
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws

Definitions

  • the present invention relates to a flat folding tool, that is to say of the type comprising a fixed blade having a horizontal surface, one edge of which constitutes the folding line, and an assembly movable in the direction of the above-mentioned horizontal surface of the fixed blade and comprising, essentially, a blank holder linked elastically to the mobile assembly and adapted to be applied against the sheet previously placed against the horizontal surface of the fixed blade to ensure its maintenance before the start of the stroke fraction of the movable assembly corresponding to the folding and a movable blade intended to be moved transversely along the edge of the horizontal surface of the fixed blade along which the folding is carried out.
  • US Pat. No. 3,058,512 discloses a flat folding device of the aforementioned type, that is to say comprising a fixed blade having a horizontal surface of which one edge constitutes the fold line and an assembly movable in the direction of the fixed blade. and essentially comprising a blank clamp connected elastically to the mobile assembly and capable of being applied against the sheet to be folded previously placed against the horizontal surface of the fixed blade to ensure its maintenance before the start of the fraction of travel of the assembly mobile corresponding to the folding and a mobile blade intended to be moved transversely along the edge of the horizontal surface along which the folding is carried out, each blade having, on its lateral face opposite the other blade at the end of the transverse stroke of the movable blade a step of release.
  • the movable blade is pivotally mounted about an axis parallel to the fold line and means are provided to cause the pivoting blade to pivot towards the fixed blade after it has reached its end of travel. transverse and thus allow the continued folding of the head at an angle less than 90 °, this folding angle being determined by the value of the travel in translation and / or rotation of the movable blade.
  • the movable blade is carried by articulated levers making this device very complex, long and delicate assembly and costly maintenance. Furthermore, in this device, the amplitude of movement of the movable blade and, consequently, the folding angle which it achieves, are determined by a cam and can therefore only be modified by a change of cam. This device is therefore not very flexible to use and, therefore, is only intended for a specific type of folding, carried out in large series.
  • the movable blade is carried by a movable support or blade holder to which it is articulated and which is slidably mounted in the sheath-shaped body of the mobile assembly, between two extreme positions, elastic means tending to move this support in the direction of the fixed blade, at least until the start of the pivoting stroke of the movable blade and the means for causing it to pivot consist of a inclined face forming a ramp provided along the free edge of the lateral face of the movable blade opposite to that facing the fixed blade and by a complementary tilt shoe carried by the body of the mobile assembly and against which the aforementioned ramp is held in abutment by spring means and so that the continuation of the travel of the mobile assembly, after the mobile blade and its support have themselves reached their end of travel, causes the pivoting of the mobile blade by sui te sliding of the aforementioned shoe on the ramp of the movable blade.
  • the elastic means acting on the movable blade holder to move it in the direction of its end position closest to the fixed blade consist of a plurality of single-acting cylinders, the piston rods of which bear against the rear face of the blade holder and whose cylinders, carried by the body of the movable assembly, are supplied with fluid under adjustable pressure by the setting of a relief valve.
  • the discharge valve is a piloted valve whose opening is controlled by means for detecting the end of travel of the movable blade holder.
  • This arrangement has the advantage of reducing the energy consumption during the stroke of the movable assembly corresponding to the pivoting of the movable blade, by eliminating the pressure in the aforementioned jacks whose action would otherwise tend to be oppose this race.
  • the elastic means acting on the blank holder are constituted by a plurality of single-acting cylinders whose piston rods, which freely pass through the movable blade holder are supported on the rear face of the blank holder and whose cylinders, carried by the body of the mobile assembly, are supplied with fluid under a pressure the maximum value of which is determined by the calibration of a relief valve, shouldered screws freely passing through the blade holder constituting the end stops in the rest position of the blank holder.
  • the flat folding tool according to the invention essentially comprises a fixed blade (2) and a movable blade (3).
  • the fixed blade (2) is located below the movable blade (3) and its upper horizontal face (2a) is intended to receive and support the sheet to be folded (4) before the start of the operation. folding.
  • This fixed blade (2) is fixed to a support (5) capable of being itself fixed to the table of a press brake or the like.
  • Above the support (5) is disposed the movable assembly (6) of this folding tool comprising, inter alia, the movable blade (3).
  • This movable assembly can in particular be fixed, for example, by a tenon (7) or movable slide of the press brake to the table from which the support (5) of the fixed blade (2) is fixed.
  • the fixed blade (2) has below its working edge (2b), that is to say in its lateral face (2c) facing the trajectory of the movable blade (3), a step (7) allowing the release of the sheet (4) when the folding angle is less than 90 °.
  • the movable blade (3) has above its working edge (3a), that is to say in its lateral face (3b) facing the fixed blade (2), a step ( 8) allowing it to execute a bending of the sheet (4) at an angle less than 90 °.
  • the movable blade (3) is carried by an anpport or blade holder (9) mounted sliding in a direction perpendicular to the surface ( 2a) of the fixed blade (2) in the sheath-shaped body (6a) of the mobile assembly (6) and to which the mobile blade (3) is articulated along an axis (11) parallel to the defined fold line by the working edge (2b) of the fixed blade (2).
  • the upper edge of the side face (3b) of the movable blade (3) has a rib (12) of partially cylindrical cross section accommodating in a cradle (13) of complementary section formed in the support (9).
  • this mounting of the movable blade (3) in its support (9) allows it to pivot in the direction of the arrow (14) between two extreme positions, that is to say a rest position as illustrated in FIGS. 1 to 3 and a position for continuing to fold as illustrated in FIG. 4.
  • the blade holder (9) was mounted in the body (6a) of the movable assembly (6) so that it can slide in a direction perpendicular to the horizontal surface (2a) of the fixed blade ( 2), that is to say in the vertical directions illustrated by the arrows (16) and (17). This sliding of the blade holder (9) is limited to two extreme positions, namely a low or extended position as illustrated in FIGS. 1 to 3 and a high or retracted position as illustrated in FIG. 4.
  • Means are provided to act on the blade holder (9) and tend to maintain it normally in its low or extended position.
  • these means are constituted by a plurality of jacks whose free end (18) of the piston rod (19) is applied to the upper face of the blade holder (9) and whose cylinder (21) is housed in the body (6a) of the mobile assembly (6), the seal being ensured by O-rings (22) and (23).
  • the cylinders (21) of these jacks are normally subjected to the pressure of a pressurized fluid supplied by the channel (24) from a pump not shown in the drawing and through a non-return valve (25).
  • a relief valve (26) limits the pressure in the cylinder (21) to the desired value.
  • the means of limiting the stroke of the blade holder (9) to its low or extended position in which it is normally held by the piston rods (19) can be produced in any suitable manner by shouldered screws passing freely through it and anchored in the bottom of the body (6a) of the movable assembly (6).
  • the mobile assembly (6) also comprises a blank holder (33) movable vertically between two extreme positions, the lower one illustrated in FIG. 1 in which its upper face is moved away from the lower face of the blade holder (9) and in which it is retained by shouldered screws (34) freely passing through the blade holder (9), and a high position in which its lower face is applied against the sheet to be folded (4) and its upper face is pressed against the underside of the blade holder (9) to which it serves as a limit stop.
  • Means are provided for acting elastically on the blank holder (33) and normally tend to keep it in the low position as illustrated in FIG. 1. According to a simple embodiment of the invention, as illustrated in the drawing and in particular visible in FIGS.
  • these means consist of piston rods (27) freely passing through the blade holder (9), the lower end of which bears against the upper face of the blank holder ( 33) and the cylinder (28) of which is supplied by a channel (29) and through a non-return valve (31) with pressurized fluid from a pump not shown in the drawing and the maximum pressure of which is limited by a valve discharge (32) whose calibration is adjustable to the desired value.
  • this folding tool is as follows: the assembly being at rest, as illustrated in FIG. 1, the sheet (4) to be folded is placed on the upper horizontal face (2a) of the fixed blade (2) of so that the fold line coincides with the working edge (2b) of the fixed blade (2).
  • the descent in the direction of the arrow (17) of the mobile assembly (6) is controlled. For example, by the action of the movable slide of a press brake on which this tool is mounted.
  • the blank holder (33) enters the first in contact with the sheet (4), the lower edge of the movable blade (3) being, as is known, offset behind the free edge, to the working face of the greenhouse -flan (33).
  • the descent of the mobile assembly (6) being continued while the blank holder (33) is stopped by the sheet (4) and the fixed blade (2), the piston rods (27) acting on it are stopped and the fluid under pressure from the jacks (28) is discharged through the valve discharge (32) whose calibration determines the tightening stroke of the sheet (4) against the fixed blade (2).
  • the pressurized fluid supplying the jacks (21) and (28) automatically return the blade holder (9) and the clamp -flan (33) in the rest position.
  • the relief valve (26) could be a pilot valve.
  • This arrangement has the advantage of making it possible to eliminate the pressure prevailing in the jacks (21) as soon as the lower face of the blade holder (9) has come into contact with the upper face of the blank holder (33). It suffices to provide means for detecting this contact. As a result, during the third fraction of the downward stroke of the movable assembly (6), the energy required for rolling the pressurized fluid contained in the cylinders (21) is saved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Knives (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (4)

1. Flachbiegeeinrichtung
mit einer festen Wange (2) mit einer horizontalen Oberfläche (2a), die mit einer ihrer Kanten (2b) die Biegungslinie bestimmt,
mit einer in Richtung der festen Wange (2) beweglichen Baugruppe (6), die im wesentlichen aus
einem mit ihr (6) elastisch verbundenen Spannstempel (33), der gegen das zuvor auf die horizontale Oberfläche (2a) der festen Wange (2) aufgelegte Blechteil (4) andrückbar ist, um dieses zu halten, bevor der dem Biegen entsprechende Teil der Bewegungsbahn der beweglichen Baugruppe (6) beginnt,
sowie einer beweglichen Wange (3) besteht, die transversal über die Längsseite der genannten Kante (2b) der horizontalen Oberfläche (2a) verschiebbar ist, längs derer die Biegung stattfindet,
wobei jede der Wangen (2, 3) in ihrer Seitenfläche (2c, 3b) in dem dem Ende der Bewegungsbahn der beweglichen Wange (3) entsprechenden Bereich eine Hohlkehle (7, 8) besitzt, und die bewegliche Wange (3) um eine parallel zur Biegungslinie verlaufende Achse (11) schwenkbar montiert ist,
sowie mit Mitteln, die ein Verschwenken der beweglichen Wange (3) in Richtung (14) auf die feste Wange (2) bewirken, nachdem sie das Ende ihrer tranversalen Bewegungsbahn erreicht hat, und so ein Biegen des Blechteils (4) um einen Winkel von weniger als 90° ermöglichen, wobei dieser Biegewinkel durch die Größe der Translationsbewegung und/ oder der Rotationsbewegung der beweglichen Wange (3) bestimmt wird,
dadurch gekennzeichnet,
daß die bewegliche Wange (3) von einem beweglichen Wangenträger (9) gehalten ist, mit dem sie gelenkig verbunden ist und der in dem als Laufführung ausgebildeten Körper (6a) der beweglichen Baugruppe (6) zwischen zwei Endstellungen gleitbar montiert ist, wobei elastische Mittel ihn (9) zumindest bis zum Beginn der Schwenkbewegung der beweglichen Wange (3) in Richtung auf die feste Wange (2) vorspannen,
und daß die Mittel zum Verschwenken der beweglichen Wange (3) aus einer geneigten Fläche (3d), die eine längs des freien Randes der der festen Wange (2) zugewandten Seite (3b) entgegengesetzten Seite (3c) der beweglichen Wange (3) verlaufende Rampe bildet, sowie aus einer von dem Körper (6a) der beweglichen Baugruppe (6) getragenen Backe (6b) mit komplementärer Neigung bestehen, gegen die die genannte Rampe sich unter der Einwirkung federnder Mittel (15, 10) abstützt, derart daß infolge des Gleitens der Backe (6b) über die Rampe (3d) der beweglichen Wange (3) letztere verschwenkt wird, wenn die Bewegung der beweglichen Baugruppe (6) fortgesetzt wird, nachdem die bewegliche Wange (3) und ihr Wangenträger (9) ihre Endstellung erreicht haben.
2. Flachbiegeeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die auf den beweglichen Wangenträger (9) zu dessen Verschiebung in Richtung (17) auf seine der festen Wange (2) nächstliegende Endposition einwirkenden elastischen Mittel von mehreren einfachwirkenden Zylinder-Kolbenanordnungen gebildet sind, deren Kolbenstangen (18) sich gegen die Rückseite des Wangenträgers (9) abstützen und deren von dem Körper (6a) der beweglichen Baugruppe (6) getragene Zylinder (21) von einem Druckfluid gespeist werden, dessen Druck durch die Tarierung eines Ablaßventils (28) regelbar ist.
3. Flachbiegeeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das Ablaßventil (26) ein gesteuertes Klappenventil ist, dessen Öffnen durch Mittel zur Detektion der Endstellung des beweglichen Wangenträgers (9) steuerbar ist.
4. Flachbiegeeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die auf den Spannstempel (33) einwirkenden elastischen Mittel von einer Mehrzahl einfachwirkender Zylinder-Kolbenanordnungen gebildet sind, deren Kolbenstangen (27) den beweglichen Wangenträger (9) frei durchdringen und sich auf der Rückseite des Spannstempels (33) abstützen und deren von dem Körper (6a) der beweglichen Baugruppe (6) getragene Zylinder (28) von einem Druckfluid gespeist sind, deren Maximaldruck durch die Tarierung eines Ablaßventils (32) bestimmt ist, wobei mit Schultern versehene Schrauben (26), die den Wangenträger (9) frei durchlaufen und Endanschläge für die Ruheposition des Spannstempels (33) bilden.
EP83420042A 1982-03-19 1983-03-14 Flachbiegeeinrichtung Expired EP0089904B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83420042T ATE17449T1 (de) 1982-03-19 1983-03-14 Flachbiegeeinrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8205046 1982-03-19
FR8205046A FR2523483B1 (fr) 1982-03-19 1982-03-19 Outil de pliage a plat

Publications (2)

Publication Number Publication Date
EP0089904A1 EP0089904A1 (de) 1983-09-28
EP0089904B1 true EP0089904B1 (de) 1986-01-15

Family

ID=9272356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83420042A Expired EP0089904B1 (de) 1982-03-19 1983-03-14 Flachbiegeeinrichtung

Country Status (7)

Country Link
US (1) US4520646A (de)
EP (1) EP0089904B1 (de)
JP (1) JPS58176023A (de)
AT (1) ATE17449T1 (de)
DE (1) DE3361825D1 (de)
ES (1) ES8401733A1 (de)
FR (1) FR2523483B1 (de)

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WO2018055193A1 (de) 2016-09-26 2018-03-29 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Werkzeug, werkzeugmaschine und verfahren zum bearbeiten von plattenförmigen werkstücken

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CN109789464B (zh) 2016-09-26 2021-01-05 通快机床两合公司 用于加工板状工件的工具和机床以及方法
CN109789470B (zh) 2016-09-26 2022-02-25 通快机床两合公司 用于加工板状工件的工具和机床以及方法
CN109789465B (zh) * 2016-09-26 2022-02-11 通快机床两合公司 用于加工板状工件的工具和机床以及方法
JP6845573B2 (ja) * 2017-11-06 2021-03-17 株式会社ヒロテック ヘミング加工装置
CN108480425B (zh) * 2018-04-17 2019-07-09 张玉芙 全自动折弯机及折弯方法
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018055193A1 (de) 2016-09-26 2018-03-29 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Werkzeug, werkzeugmaschine und verfahren zum bearbeiten von plattenförmigen werkstücken
US11478835B2 (en) 2016-09-26 2022-10-25 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Machining planar workpieces

Also Published As

Publication number Publication date
JPS58176023A (ja) 1983-10-15
FR2523483A1 (fr) 1983-09-23
ES520766A0 (es) 1984-01-01
ES8401733A1 (es) 1984-01-01
US4520646A (en) 1985-06-04
EP0089904A1 (de) 1983-09-28
DE3361825D1 (en) 1986-02-27
ATE17449T1 (de) 1986-02-15
FR2523483B1 (fr) 1985-09-27

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