EP3135393B1 - Exzentertriebwerk für eine falzmaschine - Google Patents

Exzentertriebwerk für eine falzmaschine Download PDF

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Publication number
EP3135393B1
EP3135393B1 EP16184948.4A EP16184948A EP3135393B1 EP 3135393 B1 EP3135393 B1 EP 3135393B1 EP 16184948 A EP16184948 A EP 16184948A EP 3135393 B1 EP3135393 B1 EP 3135393B1
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EP
European Patent Office
Prior art keywords
drive mechanism
eccentric drive
clamping
longitudinal direction
driven wheel
Prior art date
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Active
Application number
EP16184948.4A
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English (en)
French (fr)
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EP3135393A1 (de
Inventor
Lars Svensson
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.)
Cidan Machinery Sweden AB
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Cidan Machinery Sweden AB
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Publication date
Application filed by Cidan Machinery Sweden AB filed Critical Cidan Machinery Sweden AB
Publication of EP3135393A1 publication Critical patent/EP3135393A1/de
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    • 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

Definitions

  • the present invention relates to an eccentric drive mechanism for a folding machine of the type defined in the preamble of claim 1, preferably for folding sheet material.
  • one way of achieving the clamping force necessary for clamping a work piece to be folded is to move the clamping beam by an eccentric drive mechanism.
  • an eccentric drive mechanism By such a mechanism a number of advantages is obtained such as gives a very high clamping pressure, moves the clamping beam at best possible opening and closing speeds, has almost no wear and thereby low maintenance costs, requires no oil, and has low noise.
  • one problem with an eccentric drive mechanism is that the force obtained is strongly dependent upon an angle ⁇ formed between a vertical line through a bearing axis of the eccentric unit and a line drawn through both said bearing axis of the eccentric unit and a bearing axis of a pull down rod arranged to achieve the opening and closing movements of the clamping beam. See Fig. 1 .
  • the optimal angle is at about 15°. This means that clamping force obtained by the eccentric drive mechanism will be optimal only for a particular thickness of material of the work piece in combination with a clamping beam tooling of a particular dimension/height.
  • an object of the present invention is to provide a new eccentric drive mechanism for a folding machine by which the above-mentioned drawbacks are eliminated.
  • an eccentric drive mechanism for a folding machine comprising an eccentric wheel driven by a drive means, the eccentric unit being connected to a clamping beam, which clamping beam is provided with an upper clamping tool arranged to cooperate with a lower beam tool so as to clamp a work piece there between when the upper clamping beam performs a movement towards the lower clamping tool, characterized in that a connection between the eccentric unit and the upper clamping beam is made by at least one, in the longitudinal direction, adjustable device, and that a second end of said in the longitudinal direction adjustable device is eccentrically and pivotably connected to the driven wheel.
  • Fig. 1 shows a schematic end view of a prior art eccentric drive mechanism for a folding machine for folding preferably sheet material.
  • the eccentric drive mechanism D comprises a driven wheel 9 mounted in bearings at its center, bearing axis, and has preferably the form of a driven gear wheel 9.
  • a drive means 8, preferably an electrical motor provided with a driving gear wheal, is in mesh with said driven gear wheel 9.
  • a second end 6b of a pull down rod 6 is eccentric mounted in bearings to said driven gear wheel 9.
  • a first end 6a of said pull down rod 6 is connected through schematically shown suitable means to a clamping beam 1 of a folding machine so as to achieve an opening and closing movement of said clamping beam 1.
  • the clamping beam 1 is provided with an upper clamping tool 3 of a particular height and adapted to cooperate with a lower clamping tool 5.
  • Said pull down rod 6 has a fixed length.
  • An angle ⁇ formed between a vertical line through the bearing axis of the driven gear wheel 9 and a line drawn through both said bearing axis of the driven gear wheel 9 and a bearing axis of the second end 6b of the pull down rod is about 15° when folding a work piece having a particular thickness of material and with an upper clamping tool 3 having a particular height.
  • this angle ⁇ will vary depending upon the thickness of material of the work piece processed and with the height of the upper clamping tool 3 and/or lower clamping tool 5 used.
  • the operation of the clamping beam 1 is made by only one drive means 8.
  • a shaft 11 is rigidly connecting the driven gear wheel 9 with a wheel having a correspondingly pull down rod arranged at the opposite side (not shown) of the folding machine so as to simultaneously and synchronously move both sides of the clamping beam 1 downwardly and upwardly, respectively.
  • Fig. 2 shows an eccentric drive mechanism D' according to a first embodiment of the invention for a folding machine for sheet material.
  • Said eccentric drive mechanism is similar to the one shown in Fig. 1 , but the pull down rod 6 in Fig. 1 is formed as an in the longitudinal direction adjustable device 20', the length of which can be adjusted accordingly to the dimension of the work piece processed and the height of an upper clamping tool 3' and/or lower clamping tool 5' used.
  • the clamping beam 1' is provided with the clamping tool 3' which is adapted to cooperate with the lower clamping tool 5'.
  • a second end 6b' of said in the longitudinal direction adjustable device 20' is eccentrically connected to a driven gear wheel 9'.
  • the operation of the clamping beam 1' is preferably made by only one drive means 8 operatively connected to the driven gear wheel 9', and a shaft 11' is rigidly connecting the driven gear wheel 9' with a wheel having a correspondingly in the longitudinal direction adjustable device arranged at the opposite side (not shown) of the folding machine so as to simultaneously and synchronously move both sides of the clamping beam 1' downwardly and upwardly, respectively
  • Fig. 3 shows an eccentric drive mechanism D" according to a second embodiment of the invention for a folding machine for preferably sheet material.
  • an in the longitudinal direction adjustable device 20" comprises a pivotable arm 12", a first end 12a" of which is pivotably connected to a first end 6a" of a pull down rod 6" and a second end 12b" of which is pivotably connected to an active end 18" of a spindle gear means 16" which is adjustable in the longitudinal direction.
  • the spindle gear means 16" is preferably driven by a servo motor 17".
  • a passive end 16a" of spindle gear means 16" is connected to a clamping beam 1" 'via one hand a jacket bracket 15" and on the other hand a bracket 13 ".
  • a second 6b" end of said pull down rod 6" is pivotably and eccentrically mounted in bearings to a driven gear wheel 9" which is driven by a drive means 8 ".
  • the clamping beam 1" is provided with an upper clamping tool 3" adapted to cooperate with a lower clamping tool 5".
  • the length of the spindle gear means 16" is adjusted so that the angle ⁇ formed between a vertical line through the bearing axis of the driven gear wheel 9" and a line drawn through both said bearing axis of the driven gear wheel 9" and a bearing axis of the second end 6b" of the pull down rod 6", which bearing axis is eccentrically and pivotally connected to the driven gear wheel 9", is between 0 to 30°, preferably between 5 to 25°, and more preferably between 10 to 20°, and most preferably is about 15°, when the clamping beam 1" has obtained its optimal clamping force.
  • the arm 12" is pivotably arranged about a shaft 14a" arranged in a housing 14" so as to form a transmission ratio between the second end 12b" and the first end 12a" of the arm 12" of between 1:1 to 1:10, preferably 1:1 to 1:5, more preferably 1:1 to 1:3, and most preferably 1:2.4.
  • a pressure sensor and/or angle sensor (not shown) is arranged. This enables measuring the force exerted by the second end 12b" of the arm 12" on the active end 18" of the spindle gear means 16" and/or the angle between said the second end 12b" and said active end 18" and sending a signal to a control device (not shown) when the required force and/or angle is obtained so as to stop the movement of the clamping beam 1".
  • a corresponding eccentric drive mechanism D" with said in the longitudinal direction adjustable device 20" is arranged on the opposite side (not shown) of the folding machine.
  • Figs. 4 to 6 show different length of a spindle 21" of the spindle gear means 16" dependent upon the thickness of material of the work piece and/or the height/dimension of the upper clamping tool 3" and/or the lower clamping tool 5 ".
  • Fig. 4 the length of the spindle 21" of the spindle gear means 16" is shown to be 17 mm at an upper clamping tool height of 254 mm and a thickness of material of the work piece being 2.5 mm.
  • Fig. 5 the length of the spindle 21" of the spindle gear means 16" is shown to be 140 mm at an upper clamping tool height of 203 mm and a thickness of material of the work piece being 2.5 mm.
  • Fig. 6 the length of the spindle 21" of the spindle gear means 16" is shown to be 263 mm at an upper clamping tool height of 152 mm and a thickness of material of the work piece being 2.5 mm.
  • the in the longitudinal direction adjustable device 20' in the first embodiment can in itself be continuously variably adjustable, and the in the longitudinal direction adjustable device 20" via the spindle gear means 16" can be continuously variably adjustable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Claims (10)

  1. Exzentertriebwerk (D', D") für eine Falzmaschine, die ein durch ein Antriebsmittel (8', 8") angetriebenes Antriebsrad (9', 9") umfasst, wobei das Antriebsrad (9', 9") mit einem Klemmbalken (1', 1") verbunden ist, wobei der Klemmbalken (1', 1") mit einem oberen Klemmwerkzeug (3', 3") versehen ist, das so angeordnet ist, dass es mit einem unteren Klemmwerkzeug (5', 5") zusammenwirkt, um so ein Werkstück zwischen denselben zu klemmen, wenn der Klemmbalken (1', 1") eine Bewegung zu dem unteren Klemmwerkzeug (5', 5") ausführt, dadurch gekennzeichnet, dass eine Verbindung zwischen dem Antriebsrad (9', 9") und dem Klemmbalken (1', 1") durch eine in Längsrichtung einstellbare Vorrichtung (20', 20") hergestellt wird, und dass ein zweites Ende (6b', 6b") der in Längsrichtung einstellbaren Vorrichtung auf exzentrische und drehbare Weise mit dem Antriebsrad (9', 9") verbunden ist.
  2. Exzentertriebwerk (D', D") nach Anspruch 1, dadurch gekennzeichnet, dass die Länge der in Längsrichtung einstellbaren Vorrichtung (20', 20") so eingestellt wird, dass ein Winkel (α), der zwischen einer durch eine erste Lagerachse des Antriebsrads (9', 9") verlaufenden vertikalen Linie und einer sowohl durch die erste Lagerachse des Antriebsrads (9', 9") als auch durch eine zweite Lagerachse des zweiten Endes (6b', 6b") der in Längsrichtung einstellbaren Vorrichtung (20', 20") gezogenen Linie gebildet wird, zwischen 0 und 30 Grad, vorzugsweise zwischen 5 und 25 Grad und insbesondere zwischen 10 und 20 Grad liegt und besonders bevorzugt ungefähr 15 Grad beträgt, wenn der Klemmbalken (1', 1") seine optimale Klemmkraft erreicht hat.
  3. Exzentertriebwerk (D', D") nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Höhe des oberen Klemmwerkzeugs (3', 3") und/oder des unteren Klemmwerkzeugs (5', 5") veränderbar ist.
  4. Exzentertriebwerk (D', D") nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die in Längsrichtung einstellbare Vorrichtung (20', 20") stufenlos einstellbar ist.
  5. Exzentertriebwerk (D") nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die in Längsrichtung einstellbare Vorrichtung (20") einen drehbaren Arm (12") umfasst, dessen erstes Ende (12"a) auf drehbare Weise mit einem ersten Ende (6a") einer nach unten gerichteten Zugstange (6") verbunden ist und dessen zweites Ende (12"b) auf drehbare Weise mit einem aktiven Ende (18") eines Spindelgetriebemittels (16") verbunden ist, dessen passives Ende (16a") mit dem Klemmbalken (1") verbunden ist, und dass ein zweites Ende (6b") der nach unten gerichteten Zugstange (6") auf drehbare und exzentrische Weise mit dem Antriebsrad (9") verbunden ist.
  6. Exzentertriebwerk (D") nach Anspruch 5, dadurch gekennzeichnet, dass der Arm (12") auf drehbare Weise um eine Welle (14a") angeordnet ist, um so ein Übersetzungsverhältnis zwischen dem ersten Ende (6a") und dem zweiten Ende (6b") der nach unten gerichteten Zugstange (6") von 1:1 bis 1:10, vorzugsweise von 1:1 bis 1:5 und insbesondere von 1:1 bis 1:3 und besonders bevorzugt von 1:2,4 zu bilden.
  7. Exzentertriebwerk (D") nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass an einer Verbindungsstelle (19"), die das zweite Ende (12b") des Arms (12") auf drehbare Weise mit dem aktiven Ende (18") des Spindelgetriebemittels (16") verbindet, ein Drucksensor und/ oder ein Winkelsensor vorgesehen ist.
  8. Exzentertriebwerk (D") nach Anspruch 7, dadurch gekennzeichnet, dass der Drucksensor und/oder der Winkelsensor die Messung der Kraft, die von dem zweiten Ende (12b") des Arms (12") auf das aktive Ende (18") des Spindelgetriebemittels (16") ausgeübt wird, und/oder des Winkels zwischen dem zweiten Ende (12b") und dem aktiven Ende (18") sowie das Senden eines Signals zu einer Steuerungsvorrichtung ermöglicht, wenn die erforderliche Kraft und/oder der erforderliche Winkel erreicht wird, um die Bewegung des Klemmbalkens (1") zu stoppen.
  9. Exzentertriebwerk (D") nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, dass das Exzentertriebwerk (D") auf beiden Seiten einer Falzmaschine angeordnet ist.
  10. Exzentertriebwerk (D', D") nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Exzentertriebwerk (D', D") für eine Falzmaschine zum Falzen von bahnförmigem Material bestimmt ist.
EP16184948.4A 2015-08-26 2016-08-19 Exzentertriebwerk für eine falzmaschine Active EP3135393B1 (de)

Applications Claiming Priority (1)

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SE1551103 2015-08-26

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EP3135393B1 true EP3135393B1 (de) 2018-03-14

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE543695C2 (en) * 2019-10-15 2021-06-08 Cidan Machinery Sweden Ab A folding machine for folding sheet shaped material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750625B1 (fr) * 1996-07-05 1999-01-29 Jeandeaud Jean Claude Dispositif pour deplacer une partie d'une machine et exercer un effort en fin de course
US20030033845A1 (en) * 2001-05-24 2003-02-20 John Forlow Bending brake machine
WO2008029421A1 (en) * 2006-09-04 2008-03-13 Finn-Power Oy A kinematic system for clamping semifinished products by means of pressing for sheet metal shaping panelling machines
EP2127771B1 (de) * 2008-05-30 2012-10-17 Goiti S. Coop. Faltmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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