EP1888306A1 - Holding-down clamp for machines - Google Patents

Holding-down clamp for machines

Info

Publication number
EP1888306A1
EP1888306A1 EP06724480A EP06724480A EP1888306A1 EP 1888306 A1 EP1888306 A1 EP 1888306A1 EP 06724480 A EP06724480 A EP 06724480A EP 06724480 A EP06724480 A EP 06724480A EP 1888306 A1 EP1888306 A1 EP 1888306A1
Authority
EP
European Patent Office
Prior art keywords
hold
plates
center holder
holding
adjustable
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
EP06724480A
Other languages
German (de)
French (fr)
Other versions
EP1888306B1 (en
Inventor
Rudolf Schmitt
Walter Mees
Jörg SCHORNSTEIN
Jochen Weniger
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.)
Albrecht Baumer & Co KG Spezialmaschinenfabrik GmbH
Original Assignee
Albrecht Baumer & Co KG Spezialmaschinenfabrik GmbH
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 Albrecht Baumer & Co KG Spezialmaschinenfabrik GmbH filed Critical Albrecht Baumer & Co KG Spezialmaschinenfabrik GmbH
Publication of EP1888306A1 publication Critical patent/EP1888306A1/en
Application granted granted Critical
Publication of EP1888306B1 publication Critical patent/EP1888306B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/006—Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting blocs of plastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0625—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by endless conveyors, e.g. belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B26F1/3833—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work using an endless band-knife or the like
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303752—Process
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304536—Milling including means to infeed work to cutter
    • Y10T409/30532—Milling including means to infeed work to cutter with means to advance work or product
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304536—Milling including means to infeed work to cutter
    • Y10T409/30532—Milling including means to infeed work to cutter with means to advance work or product
    • Y10T409/305432—Endless or orbital work or product advancing means
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/304536—Milling including means to infeed work to cutter
    • Y10T409/305544—Milling including means to infeed work to cutter with work holder
    • Y10T409/3056—Milling including means to infeed work to cutter with work holder and means to selectively position work
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30784—Milling including means to adustably position cutter
    • Y10T409/307952—Linear adjustment
    • Y10T409/308288—Linear adjustment including gantry-type cutter-carrier
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/30868—Work support
    • Y10T409/309016—Work support with work holder or guide
    • 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
    • Y10T483/00—Tool changing
    • Y10T483/10—Process
    • 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
    • Y10T83/748—With work immobilizer
    • Y10T83/7487—Means to clamp work
    • 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
    • Y10T83/748—With work immobilizer
    • Y10T83/7587—Gapped work-constrainer

Definitions

  • the invention relates to a hold-down device of machines in which material blocks of soft material are processed or processed, preferably foam contour cutting machines with height adjustable parallel to a receiving table hold-down plates, the cutting machine held at least one of two bars of a machine stand on the Width of the material block has adjustable adjustable center holder for the cutting tool.
  • the invention further relates to a method for operating a hold-down.
  • the horizontally, vertically or virtually arbitrarily oriented cutting tool generates displacement forces on the workpiece to be cut as it enters the foam and also during cutting.
  • the forces arise, inter alia, from the friction between the tool and the foam as forces in the direction of oscillation or cutting channel longitudinal direction, and also as a result of the wedge effect of the tool as pushing forces in the feed direction. Both directions of force are approximately perpendicular to each other.
  • the forces create at least local shifts of the foam which ultimately result in inaccuracies of the cut contour.
  • the size of the displacements depends on various factors, including the material properties of the workpiece and the geometrical design of the cutting edge of the tool.
  • the shifts are inherently greater in the upper region of the unhindered foam block than in the lower region near the contact point on the take-up table. This is due to the fact that the receiving table carries the foam, which leads to very exact positioning and correspondingly small displacements in the region of the boundary layer between the foam and the receiving table with a high coefficient of friction. The farther from the boundary layer, the less the effect holding effect of the receiving table, so that with increasing distance from the receiving table, the shifts are greater.
  • a counter-holder is installed on the foam, which has a similar effect with respect to the displacements as the receiving table below the foam.
  • This counterholder is called downholder.
  • Hold-downs in foam cutting machines are known. They serve to clamp the foam block or the foam sheet stack between the receiving table and the hold-down in order to stabilize and calm the material lying on the receiving table so that when cutting, especially during contour cutting, the material block as little as possible deflected by the cutting tool . is set in natural vibrations, so that the most accurate contour cuts are possible.
  • Cutting machines have already been developed with hold-downs, which are directly connected to the receiving table and held in a frame hold-down plates. Due to this construction, the receiving table builds very heavily, which has a disadvantageous effect in the case of movable receiving tables in their acceleration behavior. In addition, the high frame structure can lead to unwanted vibrations during the feed during the cut, which in turn adversely affects the cutting accuracy.
  • These cutting machines have a center holder which causes the free bending length of the knife to be shortened, causing a significant reduction in the deflection of the cutting tool depending on the degree of shortening. As a result, in turn, the cutting tolerances resulting from the bending and bending of the cutting tool are usually reduced.
  • hold-downs have been proposed that are equipped with hold-down rollers.
  • the hold-downs are arranged height-adjustable on the machine stands.
  • the rollers have, at least in the area of the center holder, at a distance, which ensures that the center holder can be easily moved transversely.
  • a disadvantage of the roller retainers is that the soft material blocks are not adequately supported, at least for certain cutting tasks. Instead of a surface support of the blank holder, only a line support of the rollers is given. Between the rollers, the soft material can not be held down. For complicated contour cuts, this small contact surface can lead to waste during cutting.
  • the invention has the object of developing a generic hold-down so that in spite of optimally large edition a fast, automatic change of blocks with appropriate transverse displacement of the center holder, as well as a discharge of the receiving table of weight and unwanted vibrations during operation is guaranteed.
  • the hold-down has support elements which are mounted vertically adjustable on the bars, that the support elements wear a hold-down frame, that the hold-down plates are guided longitudinally displaceable in hold-down frame, and that the hold-down plates at least in the region of the center holder a the width have the center holder excess gap-shaped distance to accommodate the center holder between them can.
  • the hold-down plates are moved longitudinally, they can be moved to a position outside the collision area with the center holder.
  • the middle holder can now be moved transversely.
  • the receiving table is particularly easily accessible for loading and unloading.
  • the hold-down plates can be moved back again. Care must be taken only that the hold-down plates in the area in which the center holder is spaced from each other. This results in the advantage of a, at least in the area above the cutting tool large-area support of the material blocks, which is compared to the support by roll hold considerably better and more effective. A working on the cut disadvantageous fulling of the block of material, as in the roll hold-down is excluded.
  • the mechanical connection of the hold-down takes place detached from the receiving table on a separate height adjustment.
  • the receiving table remains unmolested by the additional mass of the blank holder, so that its position control loop is not affected. Also possible longitudinal vibrations, which in turn would adversely affect the cutting tolerances, are avoided.
  • the support table may be stationary or movable, be equipped with or without loading belts or even be designed as a table-top system, in which a fixed or movable support table is equipped with at least one conveyor belt for moving and positioning the foam block. If either the support table as a whole or the band of the tabletop system realizes the function of the procedure or positioning, then the support table represents one of the NC axes of the foam cutting machine. With a fixed support table, the corresponding movable cutting unit usually represents an NC axis NC axis is realized in most cases by the vertical movement of the cutting unit or the cutting tool.
  • a rotating knife or a wire which acts as a cutting tool, hereinafter also referred to as knife, and whose rotation represents the third NC axis.
  • the rotation means that in the cutting area the leading edge of the knife is tracked in the cutting direction; this happens through z.
  • the hold-down plates are arranged in a fixed grid of hold-down plate to gap, and that the hold-down is transversely adjustable in this fixed pitch. This results in a simple machine control, the corresponding grid can be specified.
  • the number and arrangement of the hold-down plates is almost freely configurable before the construction of the machine, but on the fully assembled machine can not be easily changed.
  • the hold-down plates are to be arranged so that gaps of typically z. B. arise 130 mm in between. In one of these gaps of the center holder is arranged, which contains a knife guide at its lower tip.
  • the hold-down plates in order to be able to adjust the arrangement of the hold-down plates more freely, it is also possible for the hold-down plates to be detachably held on the hold-down frame and mounted transversely displaceable relative to one another.
  • the gap required for the hold-down can be realized at any point by moving the hold-down plates.
  • the hold-down plates are adjustable in their width. With these preferably automatically telescoping hold-down plates an even more flexible adjustment of the hold-down surface and the gap for receiving the intermediate holder is ensured.
  • the longitudinal displacement drive of the holding table and the longitudinal displacement drive of the hold-down plates must be coupled to one another via couplings. It is advantageous, however, if the synchronization by electrical or electronic means, for. B. according to the system Mother / Chield is realized.
  • the recording table as a mother gives appropriate impulses to the drive of the hold-down plates, which acts as a chield.
  • Showing: 1 is a side view of a cutting machine with inventive hold-down during operation
  • Fig. 3 is a side view of the cutting machine with inventive hold-down during the transverse displacement of the center holder
  • the figures show the machine stand 1 and a receiving table 2 of a cutting machine.
  • the cutting unit 3 is guided adjustable in height.
  • the hold-down 4 has support elements, which are guided vertically adjustable on the machine frame 1.
  • the support elements carry a hold-down frame 6, which in turn holds hold-down plates 7 to 10 longitudinally displaceable.
  • the hold-down plates 6 to 10 are arranged above the material block 11.
  • the indicated blade 12 is supported by a center holder 13 in addition to the brackets in the blade unit 3.
  • the center holder 13 is positioned in the region of a gap 14.
  • the hold-down plates 6 to 10 can be moved longitudinally without bumping them against the center holder 13.
  • the hold-down plates 6 to 10 are then moved to the left.
  • the center holder 12 can be traversed 6 to 10 without problems in this position the hold-down plates without problems.
  • the hold-down plates 6 to 10 are moved.
  • the hold-down plates 6 to 10 can be moved back into the position according to FIG. LIST OF REFERENCE NUMBERS

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Jigs For Machine Tools (AREA)
  • Laser Beam Processing (AREA)
  • Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Machine Tool Units (AREA)
  • Shearing Machines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Abstract

The invention relates to a machine holding-down clamp (4) for machines on which soft material blocks (11) are machined or cut, in particular for foam material counter-cutting machines comprising the holding-down clamp plates (6 to 10), which are height-adjustable in a parallel position with respect to a receiving table (2), wherein a cutting machine comprises at least one central post (13) for a cutting tool (12) which is supported by two bars of a machine stand (1) and is adjustable according to a material block width. The aim of said invention is to improve the holding-down clamp in such a way that it makes it possible to rapidly and automatically change a block by transversally displacing the central post in spite of an optimally large rest surface. For this purpose, the inventive holding-down clamp (4) comprises bearing elements which are mounted on the bars in such a way that they are height-adjustable, said bearing elements support the holding-down clamp frame (5), the holding-down clamp plates (6 to 10) are guided in the holding-down clamp frame (5) in such a way that they are displaceable in the length direction and said holding-down clamp plates (6 to 10) comprise slit-shaped spaces (14) which are larger than the width of the central post (13) at least in the area thereof in such a way that said central post (13) can be placed between said plates.

Description

80 00080,000
Niederhalter für MaschinenDownholder for machines
Die Erfindung betrifft einen Niederhalter von Maschinen, in denen Materialblöcke aus weichem Werkstoff be- bzw. verarbeitet werden, vorzugsweise von Schaumstoff-Konturschneidemaschinen mit parallel zu einem Aufnahmetisch höhen- anstellbaren Niederhalterplatten, wobei die Schneidmaschine mindestens einen an zwei Holmen eines Maschinenständers gehaltenen, auf die Breite des Materialblocks anpassbar einstellbaren Mittenhalter für das Schneidwerkzeug besitzt. Die Erfindung betrifft weiterhin ein Verfahren zum Betreiben eines Niederhalters.The invention relates to a hold-down device of machines in which material blocks of soft material are processed or processed, preferably foam contour cutting machines with height adjustable parallel to a receiving table hold-down plates, the cutting machine held at least one of two bars of a machine stand on the Width of the material block has adjustable adjustable center holder for the cutting tool. The invention further relates to a method for operating a hold-down.
In Schaumschneidemaschinen erzeugt das horizontal, vertikal oder quasi beliebig orientierte Schneidwerkzeug bei Eintritt in den Schaum und auch während des Schneidens Verschiebekräfte auf das zu schneidende Werkstück. Die Kräfte entstehen u. a. durch die Reibung zwischen Werkzeug und Schaum als Kräfte in Os- zillations- bzw. Schnittkanallängsrichtung, als auch infolge der Aufkeilwirkung des Werkzeugs als Schiebekräfte in Vorschubrichtung. Beide Kraftrichtungen stehen etwa senkrecht aufeinander. Die Kräfte erzeugen zumindest lokale Verschiebungen des Schaumstoffs, die letztendlich in Ungenauigkeiten der geschnittenen Kontur resultieren. Die Größe der Verschiebungen ist abhängig von verschiedenen Faktoren, unter anderem von der Materialbeschaffenheit des Werkstücks und der geometrischen Ausführung der Schneide des Werkzeugs. Die Verschiebungen sind im oberen Bereich des ungehaltenen Schaumstoffblocks prinzipbedingt größer als im unteren Bereich nahe der Auflagestelle auf dem Aufnahmetisch. Das liegt daran, dass der Aufnahmetisch den Schaum führt, was im Bereich der Grenzschicht zwischen Schaum und Aufnahmetisch bei hohem Reibwert zu sehr exakter Positionierung und entsprechend geringen Verschiebungen führt. Je weiter entfernt von der Grenzschicht geschnitten wird, desto weniger wirkt sich die Ge- genhaltewirkung des Aufnahmetisches aus, so dass mit zunehmender Entfernung vom Aufnahmetisch die Verschiebungen größer werden.In foam cutting machines, the horizontally, vertically or virtually arbitrarily oriented cutting tool generates displacement forces on the workpiece to be cut as it enters the foam and also during cutting. The forces arise, inter alia, from the friction between the tool and the foam as forces in the direction of oscillation or cutting channel longitudinal direction, and also as a result of the wedge effect of the tool as pushing forces in the feed direction. Both directions of force are approximately perpendicular to each other. The forces create at least local shifts of the foam which ultimately result in inaccuracies of the cut contour. The size of the displacements depends on various factors, including the material properties of the workpiece and the geometrical design of the cutting edge of the tool. The shifts are inherently greater in the upper region of the unhindered foam block than in the lower region near the contact point on the take-up table. This is due to the fact that the receiving table carries the foam, which leads to very exact positioning and correspondingly small displacements in the region of the boundary layer between the foam and the receiving table with a high coefficient of friction. The farther from the boundary layer, the less the effect holding effect of the receiving table, so that with increasing distance from the receiving table, the shifts are greater.
Um diesen Verschiebungen entgegen zu wirken, wird auf dem Schaum ein Gegenhalter installiert, der bezüglich der Verschiebungen eine ähnliche Wirkung hat wie der Aufnahmetisch unterhalb des Schaums. Dieser Gegenhalter wird Niederhalter genannt.To counteract these displacements, a counter-holder is installed on the foam, which has a similar effect with respect to the displacements as the receiving table below the foam. This counterholder is called downholder.
Niederhalter in Schaumstoff-Schneidemaschinen sind bekannt. Sie dienen dazu, den Schaumstoffblock oder auch den Schaumstoffplattenstapel zwischen dem Aufnahmetisch und dem Niederhalter einzuklemmen, um das auf dem Aufnahmetisch liegende Material so weit zu stabilisieren und zu beruhigen, dass beim Schneiden, insbesondere beim Konturenschneiden, der Materialblock möglichst wenig durch das Schneidwerkzeug ausgelenkt bzw. in Eigenschwingungen versetzt wird, so dass möglichst exakte Konturenschnitte möglich sind.Hold-downs in foam cutting machines are known. They serve to clamp the foam block or the foam sheet stack between the receiving table and the hold-down in order to stabilize and calm the material lying on the receiving table so that when cutting, especially during contour cutting, the material block as little as possible deflected by the cutting tool . is set in natural vibrations, so that the most accurate contour cuts are possible.
Es wurden bereits Schneidmaschinen mit Niederhaltern entwickelt, die direkt mit dem Aufnahmetisch verbunden sind und die in einem Rahmen gehaltenen Niederhalterplatten aufwiesen. Durch diese Konstruktion baut der Aufnahmetisch sehr schwer, was sich bei verfahrbaren Aufnahmetischen in deren Beschleunigungsverhalten nachteilig auswirkt. Hinzu kommt, dass der hohe Rahmenaufbau zu ungewollten Schwingungen beim Vorschub während des Schnitts führen kann, was wiederum die Schnittgenauigkeit nachteilig beeinflusst. Diese Schneidmaschinen weisen einen Mittenhalter auf, der bewirkt, dass die freie Biegelänge des Messers verkürzt wird, was je nach dem Grad der Verkürzung eine erhebliche Reduzierung der Durchbiegung des Schneidwerkzeugs bewirkt. Dadurch wiederum werden die prinzipbedingten und aus der Durchbiegung des Schneidwerkzeugs resultierenden Schneidtoleranzen zumeist reduziert. Soll bei dieser Schneidmaschine der Mittenhalter in eine für den Schnitt bessere Position verfahren werden, so mussten die im Verfahrweg befindlichen Niederhalterplatten aus dem Rahmen entfernt und nach dem Verfahren des Mittenhalters wieder an diesem Platz eingesetzt werden. Dieser entsprechende Umbau ist umständlich und insbesondere zeitaufwendig.Cutting machines have already been developed with hold-downs, which are directly connected to the receiving table and held in a frame hold-down plates. Due to this construction, the receiving table builds very heavily, which has a disadvantageous effect in the case of movable receiving tables in their acceleration behavior. In addition, the high frame structure can lead to unwanted vibrations during the feed during the cut, which in turn adversely affects the cutting accuracy. These cutting machines have a center holder which causes the free bending length of the knife to be shortened, causing a significant reduction in the deflection of the cutting tool depending on the degree of shortening. As a result, in turn, the cutting tolerances resulting from the bending and bending of the cutting tool are usually reduced. If the middle holder is to be moved into a position which is better for the cut in this cutting machine, then the hold-down plates located in the travel path had to be removed from the frame and be used again at this place after the procedure of the center holder. This conversion is cumbersome and time-consuming.
Aus diesem Grunde wurden auch schon Niederhalter vorgeschlagen, die mit Niederhalterrollen ausgestattet sind. Die Niederhalter sind an den Maschinenständern höhenverstellbar angeordnet. Die Rollen weisen, zumindest im Bereich des Mittenhalters, einen Abstand auf, der gewährleistet, dass der Mittenhalter problemlos quer verfahren werden kann. Nachteilig an den Rollenniederhaltern ist jedoch, dass die weichen Materialblöcke zumindest bei bestimmten Schneidaufgaben nicht ausreichend abgestützt sind. Anstelle einer Flächenauflage des Niederhalters ist lediglich eine Linienauflage der Rollen gegeben. Zwischen den Rollen kann das weiche Material nicht niedergehalten werden. Bei komplizierten Konturenschnitten kann diese geringe Auflagefläche zu Ausschuss beim Schnitt führen.For this reason, hold-downs have been proposed that are equipped with hold-down rollers. The hold-downs are arranged height-adjustable on the machine stands. The rollers have, at least in the area of the center holder, at a distance, which ensures that the center holder can be easily moved transversely. A disadvantage of the roller retainers, however, is that the soft material blocks are not adequately supported, at least for certain cutting tasks. Instead of a surface support of the blank holder, only a line support of the rollers is given. Between the rollers, the soft material can not be held down. For complicated contour cuts, this small contact surface can lead to waste during cutting.
Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Niederhalter so weiterzubilden, dass trotz optimal großer Auflage ein schneller, automatischer Wechsel der Blöcke mit entsprechender Querverschiebung der Mittenhalter, sowie eine Entlastung des Aufnahmetischs von Gewicht und von ungewollten Schwingungen während des Betriebs gewährleistet ist.The invention has the object of developing a generic hold-down so that in spite of optimally large edition a fast, automatic change of blocks with appropriate transverse displacement of the center holder, as well as a discharge of the receiving table of weight and unwanted vibrations during operation is guaranteed.
Zur Lösung dieser Aufgabe wird vorgeschlagen, dass der Niederhalter Tragelemente aufweist, die an den Holmen höhenverstellbar gelagert sind, dass die Tragelemente einen Niederhalterrahmen tragen, dass die Niederhalterplatten längs verschiebbar im Niederhalterrahmen geführt sind, und dass die Niederhalterplatten zumindest im Bereich des Mittenhalters einen die Breite des Mittenhalters übersteigenden spaltförmigen Abstand aufweisen, um den Mittenhalter zwischen sich aufnehmen zu können.To solve this problem it is proposed that the hold-down has support elements which are mounted vertically adjustable on the bars, that the support elements wear a hold-down frame, that the hold-down plates are guided longitudinally displaceable in hold-down frame, and that the hold-down plates at least in the region of the center holder a the width have the center holder excess gap-shaped distance to accommodate the center holder between them can.
Dadurch, dass die Niederhalterplatten längs verfahrbar sind, können diese in eine Position außerhalb des Kollisionsbereichs mit dem Mittenhalter verfahren werden. Der Mittenhalter kann nun quer verfahren werden. In dieser Position der Niederhalterplatten ist der Aufnahmetisch zudem besonders gut zugänglich, um diesen zu Be- bzw. entladen. Im Anschluss daran können die Niederhalterplatten wieder zurückgefahren werden. Es muss lediglich darauf geachtet werden, dass die Niederhalterplatten in dem Bereich, in dem der Mittenhalter steht, voneinander beabstandet sind. Damit ergibt sich der Vorteil einer, zumindest im Bereich oberhalb des Schneidwerkzeugs großflächigen Abstützung der Materialblöcke, die gegenüber der Abstützung durch Rollenniederhalter erheblich besser und effektiver ist. Ein sich auf den Schnitt nachteilig auswirkendes Walken des Materialblocks, wie beim Rollenniederhalter, ist ausgeschlossen. Ein vorheriges Besäumen der Oberseite des Materialblocks, wie es bei den Rollenniederhaltern notwendig ist, damit eine möglichst ebene Auflagefläche für die Rollen entsteht, ist bei der Verwendung der Niederhalterplatten überflüssig. Es ergibt sich zusätzlich der Vorteil der automatischen Verfahrbarkeit des Mittenhalters, da die Niederhalterplatten nicht von Hand entfernt und wieder eingefügt und ggf. neu justiert werden müssen. Die Niederhalterplatten erlauben auch die Bearbeitung von kleinen Einzelblöcken, die mit einem Rollenniederhalter nicht mehr bzw. nur unzureichend bearbeitet werden könnten.The fact that the hold-down plates are moved longitudinally, they can be moved to a position outside the collision area with the center holder. The middle holder can now be moved transversely. In addition, in this position of the hold-down plates, the receiving table is particularly easily accessible for loading and unloading. Following this, the hold-down plates can be moved back again. Care must be taken only that the hold-down plates in the area in which the center holder is spaced from each other. This results in the advantage of a, at least in the area above the cutting tool large-area support of the material blocks, which is compared to the support by roll hold considerably better and more effective. A working on the cut disadvantageous fulling of the block of material, as in the roll hold-down is excluded. A previous trimming of the top of the block of material, as is necessary in the roller retainers, so that the most level possible bearing surface for the rollers is unnecessary when using the hold-down plates. This results in addition to the advantage of the automatic mobility of the center holder, since the hold-down plates must not be removed by hand and reinserted and possibly readjusted. The hold-down plates also allow the processing of small individual blocks that could no longer or only insufficiently be processed with a roller hold-down device.
Die mechanische Anbindung des Niederhalters erfolgt losgelöst vom Aufnahmetisch an einer separaten Höhenverstellung. Dadurch bleibt der Aufnahmetisch unbehelligt von der Zusatzmasse des Niederhalters, so dass dessen Lage- Regelkreis davon nicht beeinflusst wird. Auch eventuelle Längsschwingungen, die sich wiederum ungünstig auf die Schneidtoleranzen auswirken würden, sind vermieden..The mechanical connection of the hold-down takes place detached from the receiving table on a separate height adjustment. As a result, the receiving table remains unmolested by the additional mass of the blank holder, so that its position control loop is not affected. Also possible longitudinal vibrations, which in turn would adversely affect the cutting tolerances, are avoided.
Der Auflagetisch kann feststehend oder verfahrbar sein, mit oder ohne Beladebändern ausgerüstet sein oder gar als Tischbandsystem ausgeführt sein, bei dem ein feststehender oder verfahrbarer Auflagetisch mit zumindest einem Transportband zum Verfahren und Positionieren des Schaumstoffblocks bestückt ist. Wenn entweder der Auflagetisch als Ganzes oder aber das Band des Tischbandsystems die Funktion der Verfahrung bzw. Positionierung realisiert, dann stellt der Auflagetisch eine der NC-Achsen der Schaumstoffschneidemaschine dar. Bei feststehendem Auflagetisch stellt das entsprechend verfahrbare Schneidaggregat zumeist eine NC-Achse dar. Die zweite NC-Achse wird in den meisten Fällen durch das vertikale Verfahren des Schneidaggregats oder des Schneidwerkzeugs realisiert. Am Schneidaggregat wird üblicherweise entweder ein oszillierendes, ein umlaufendes Messer oder ein Draht angeordnet, das als Schneidwerkzeug, im folgenden auch nur Messer genannt, fungiert und dessen Drehung die dritte NC-Achse darstellt. Mit der Drehung ist gemeint, dass im Schneidbereich die Vorderkante des Messers in Schneidrichtung nachgeführt wird; das geschieht durch z. B. endloses Drehen des oszillierenden Messers oder endliches Hin- und Herdrehen des umlaufenden Messers. Drähte müssen aufgrund ihrer Geometrie nicht verdreht werden, sondern werden beliebig orientiert durch den Schaum gezogen.The support table may be stationary or movable, be equipped with or without loading belts or even be designed as a table-top system, in which a fixed or movable support table is equipped with at least one conveyor belt for moving and positioning the foam block. If either the support table as a whole or the band of the tabletop system realizes the function of the procedure or positioning, then the support table represents one of the NC axes of the foam cutting machine. With a fixed support table, the corresponding movable cutting unit usually represents an NC axis NC axis is realized in most cases by the vertical movement of the cutting unit or the cutting tool. On the cutting unit usually either an oscillating, a rotating knife or a wire is arranged, which acts as a cutting tool, hereinafter also referred to as knife, and whose rotation represents the third NC axis. The rotation means that in the cutting area the leading edge of the knife is tracked in the cutting direction; this happens through z. B. endless turning of the oscillating knife or finite back and forth turning of the rotating knife. Due to their geometry, wires do not need to be twisted but are pulled through the foam in an arbitrary orientation.
Es hat sich bewährt, dass die Niederhalterplatten in einem festen Rastermaß von Niederhalterplatte zu Spalt angeordnet sind, und dass der Niederhalter in diesem festen Rastermaß quer verschiebbar einstellbar ist. Dadurch ergibt sich eine einfache Maschinensteuerung, der das entsprechende Raster vorgebbar ist. Die Anzahl und Anordnung der Niederhalterplatten ist vor dem Bau der Maschine fast frei konfigurierbar, an der fertig montierten Maschine aber nicht mehr ohne weiteres veränderbar. Die Niederhalterplatten sind so anzuordnen, dass Lücken von typischerweise z. B. 130 mm dazwischen entstehen. In einer dieser Lücken ist der Mittenhalter angeordnet, der an seiner unteren Spitze eine Messerführung enthält.It has been proven that the hold-down plates are arranged in a fixed grid of hold-down plate to gap, and that the hold-down is transversely adjustable in this fixed pitch. This results in a simple machine control, the corresponding grid can be specified. The number and arrangement of the hold-down plates is almost freely configurable before the construction of the machine, but on the fully assembled machine can not be easily changed. The hold-down plates are to be arranged so that gaps of typically z. B. arise 130 mm in between. In one of these gaps of the center holder is arranged, which contains a knife guide at its lower tip.
Um die Anordnung der Niederhalterplatten freier einstellen zu können besteht aber auch die Möglichkeit, dass die Niederhalterplatten lösbar am Niederhalterrahmen gehalten und gegeneinander quer verschiebbar gelagert sind. Damit lässt sich der für den Niederhalter benötigte Spalt an beliebiger Stelle durch Verschieben der Niederhalterplatten realisieren. Von Vorteil ist, wenn die Niederhalterplatten in ihrer Breite einstellbar sind. Mit diesen vorzugsweise automatisch teleskopierbaren Niederhalterplatten ist eine noch flexiblere Einstellung der Niederhalterfläche und des Spaltes zur Aufnahme des Zwischenhalters gewährleistet.However, in order to be able to adjust the arrangement of the hold-down plates more freely, it is also possible for the hold-down plates to be detachably held on the hold-down frame and mounted transversely displaceable relative to one another. Thus, the gap required for the hold-down can be realized at any point by moving the hold-down plates. It is advantageous if the hold-down plates are adjustable in their width. With these preferably automatically telescoping hold-down plates an even more flexible adjustment of the hold-down surface and the gap for receiving the intermediate holder is ensured.
Bei einem Niederhalter mit einem längsverfahrbaren und/oder ein Tischbandsystem aufweisenden Aufnahmetisch, hat es sich bewährt, dass eine schaltbare Synchronisation der Längsverfahrantriebe für den Aufnahmetisch und/oder das Bandsystem und für die Niederhalterplatten vorgesehen ist. Damit ist gewährleistet, dass die Materialblöcke ohne Relativbewegung zwischen dem Aufnahmetisch und dem Niederhalter gehandhabt werden können.In the case of a hold-down device with a longitudinally movable and / or a table-top system having a receiving table, it has proven useful to provide a switchable synchronization of the longitudinal travel drives for the receiving table and / or the belt system and for the hold-down plates. This ensures that the blocks of material can be handled without relative movement between the receiving table and the hold-down.
Es besteht die Möglichkeit, die Synchronisierung mechanisch zu gewährleisten. Hier müssen der Längsverschiebeantrieb des Aufnahmetischs und der Längsver- schiebeantrieb der Niederhalterplatten über Kupplungen miteinander gekoppelt werden. Von Vorteil ist jedoch, wenn die Synchronisation auf elektrischem oder elektronischem Wege, z. B. nach dem System Mother/Chield realisiert wird. Der Aufnahmetisch als Mother gibt entsprechende Impulse an den Antrieb der Niederhalterplatten, der als Chield wirkt.It is possible to ensure synchronization mechanically. Here, the longitudinal displacement drive of the holding table and the longitudinal displacement drive of the hold-down plates must be coupled to one another via couplings. It is advantageous, however, if the synchronization by electrical or electronic means, for. B. according to the system Mother / Chield is realized. The recording table as a mother gives appropriate impulses to the drive of the hold-down plates, which acts as a chield.
Es hat sich bewährt, dass der Niederhalter positionsgeregelt und / oder kraftgeregelt auf den Materialblock absenkbar ist. Damit lassen sich, je nach Festigkeit des zu verarbeitenden Materialblocks, optimale Niederhalterdrücke einstellen.It has been proven that the hold-down position-controlled and / or force controlled on the block of material can be lowered. Thus, depending on the strength of the material block to be processed, optimum hold-down pressures can be set.
Die Erfindung wird anhand von Zeichnungen näher erläutert.The invention will be explained in more detail with reference to drawings.
Dabei zeigt: Fig. 1 die Seitenansicht einer Schneidmaschine mit erfindungsgemäßem Niederhalter während des Betriebs,Showing: 1 is a side view of a cutting machine with inventive hold-down during operation,
Fig. 2 die Draufsicht nach Figur 1 ,2 is the plan view of Figure 1,
Fig. 3 die Seitenansicht der Schneidmaschine mit erfindungsgemäßem Niederhalter während des Querverschiebens des Mittenhalters, undFig. 3 is a side view of the cutting machine with inventive hold-down during the transverse displacement of the center holder, and
Fig. 4 die Draufsicht nach Figur 3.4 is the plan view of Figure 3.
Die Figuren zeigen den Maschinenständer 1 und einen Aufnahmetisch 2 einer Schneidmaschine. Am Maschinenständer 1 ist das Schneidaggregat 3 höhenverstellbar geführt. Der Niederhalter 4 weist Tragelemente auf, welche höhenverstellbar am Maschinenständer 1 geführt sind. Die Tragelemente tragen einen Niederhalterrahmen 6, welcher wiederum Niederhalterplatten 7 bis 10 längs verschiebbar haltert. Die Niederhalterplatten 6 bis 10 sind über dem Materialblock 11 angeordnet. Das angedeutete Messer 12 wird von einem Mittenhalter 13 zusätzlich zu den Halterungen im Messeraggregat 3 gehaltert. Der Mittenhalter 13 ist im Bereich eines Spaltes 14 positioniert. Damit können die Niederhalterplatten 6 bis 10 längs verfahren werden, ohne sie gegen den Mittenhalter 13 stoßen.The figures show the machine stand 1 and a receiving table 2 of a cutting machine. On the machine frame 1, the cutting unit 3 is guided adjustable in height. The hold-down 4 has support elements, which are guided vertically adjustable on the machine frame 1. The support elements carry a hold-down frame 6, which in turn holds hold-down plates 7 to 10 longitudinally displaceable. The hold-down plates 6 to 10 are arranged above the material block 11. The indicated blade 12 is supported by a center holder 13 in addition to the brackets in the blade unit 3. The center holder 13 is positioned in the region of a gap 14. Thus, the hold-down plates 6 to 10 can be moved longitudinally without bumping them against the center holder 13.
In Figur 3 und 4 sind die Niederhalterplatten 6 bis 10 dann nach links verfahren. Der Mittenhalter 12 kann in dieser Stellung der Niederhalterplatten 6 bis 10 problemlos quer verfahren werden. Für einen Wechsel in der Breite der Materialblöcke 11 kann der Mittenhalter 13 im Raster der Spalte 14, 14', 14", 14'", der Niederhalterplatten 6 bis 10 verfahren werden. Nach dem Verfahren des Mittenhalters 13 in einen der weiteren Spalte 14", 14", 14'", können die Niederhalterplatten 6 bis 10 wieder zurück in die Position nach Figur 1 verfahren werden. BezugszeichenlisteIn FIGS. 3 and 4, the hold-down plates 6 to 10 are then moved to the left. The center holder 12 can be traversed 6 to 10 without problems in this position the hold-down plates without problems. For a change in the width of the material blocks 11 of the center holder 13 in the grid of the column 14, 14 ', 14 ", 14'", the hold-down plates 6 to 10 are moved. After moving the middle holder 13 into one of the further gaps 14 ", 14", 14 '", the hold-down plates 6 to 10 can be moved back into the position according to FIG. LIST OF REFERENCE NUMBERS
1. Maschinenständer1. Machine stand
2. Aufnahmetisch2nd shooting table
3. Schneidaggregat3. Cutting unit
4. Niederhalter4. Hold down
5. Niederhalterrahmen5. hold-down frame
6. Niederhalterplatte6. hold-down plate
7. Niederhalterplatte7. Hold-down plate
8. Niederhalterplatte8. Hold-down plate
9. Niederhalterplatte9. hold-down plate
10. Niederhalterplatte10. Hold-down plate
11. Materialblock11. Material block
12. Messer12th knife
13. Mittenhalter13. Center holder
14. Spalt 14. split

Claims

Patentansprüche claims
1. Niederhalter (4) von Maschinen in denen Materialblöcke (11 ) aus weichem Werkstoff be- bzw. verarbeitet werden, vorzugsweise von Schaumstoff- Konturenschneidemaschinen, mit parallel zu einem Aufnahmetisch(2) höhe- nanstellbaren Niederhalterplatten (6 bis 10), wobei die Schneidmaschine mindestens einen an zwei Holmen eines Maschinenständers (1 ) gehaltenen, auf die Breite des Materialblocks (11 ) anpassbar einstellbaren Mittenhalter (13) für das Schneidwerkzeug (12) besitzt, dadurch gekennzeichnet, dass der Niederhalter (4) Tragelemente aufweist, die an den Holmen höhenverstellbar gelagert sind, dass die Tragelemente einen Niederhalterrahmen (5) tragen, dass die Niederhalterplatten (6 bis 10) längs verschiebbar im Niederhalterrahmen (5) geführt sind, und dass die Niederhalterplatten (6 bis 10) zumindest im Bereich des Mittenhalters (13) einen die Breite des Mittenhalters (13) übersteigenden spaltförmigen (14) Abstand aufweisen, um den Mittenhalter (13) zwischen sich aufnehmen zu können.1. hold-down device (4) of machines in which material blocks (11) are processed or processed from soft material, preferably foam contour cutting machines, with parallel to a receiving table (2) elevations nanstellbaren hold-down plates (6 to 10), wherein the Cutting machine at least one on two bars of a machine stand (1) held on the width of the material block (11) adjustably adjustable center holder (13) for the cutting tool (12) possesses, characterized in that the hold-down (4) has supporting elements which on the Holmen are mounted adjustable in height, that the support elements carry a hold-down frame (5), that the hold-down plates (6 to 10) are guided longitudinally displaceable in the hold-down frame (5), and that the hold-down plates (6 to 10) at least in the region of the center holder (13) have a gap of the center holder (13) extending gap-shaped (14) distance to receive the center holder (13) between them n to be able to.
2. Niederhalter nach Anspruch 1 , dadurch gekennzeichnet, dass die Niederhalterplatten (6 bis 10) in einem festen Rastermaß angeordnet sind, und dass der Mittenhalter (13) in dem Rastermaß quer verschiebbar einstellbar ist.2. hold-down according to claim 1, characterized in that the hold-down plates (6 to 10) are arranged in a fixed grid, and that the center holder (13) is displaceable transversely adjustable in the grid.
3. Niederhalter nach Anspruch 1 , dadurch gekennzeichnet, dass die Niederhalterplatten (6 bis 10) lösbar am Niederhalterrahmen gehalten und gegeneinander quer verschiebbar gelagert sind, und dass der Mittenhalter (13) im Maße der Querverschiebung der Spalte (14) zwischen den Niederhalterplatten (6 bis 10) quer verschiebbar einstellbar ist.3. hold-down according to claim 1, characterized in that the hold-down plates (6 to 10) releasably held on hold-down frame and are mounted transversely slidably against each other, and that the center holder (13) in the extent of the transverse displacement of the column (14) between the hold-down plates (6 to 10) is transversely adjustable.
4. Niederhalter nach Anspruch 1 , dadurch gekennzeichnet, dass die Niederhalterplatten (6 bis 10) in ihrer Breite einstellbar sind, und dass der Mittenhalter (13) im Maße der durch die Breiteneinstellung sich ergebenden Spalte (14) quer verschiebbar einstellbar ist.4. down device according to claim 1, characterized in that the hold-down plates (6 to 10) are adjustable in width, and that the center holder (13) in the extent of the width adjustment resulting column (14) is transversely adjustable.
5. Niederhalter nach einem der Ansprüche 1 bis 4 mit einem längsverfahrbaren und/oder ein Tischbandsystem aufweisenden Aufnahmetisch, dadurch gekennzeichnet, dass eine schaltbare Synchronisation der Längsverfahrantriebe für den Aufnahmetisch und/oder das Bandsystem und für die Niederhalterplatten (6 bis 10) vorgesehen ist.5. Down device according to one of claims 1 to 4 with a längsverfahrbaren and / or a table tape system having a receiving table, characterized in that a switchable synchronization of the Längsverfahrantriebe for the receiving table and / or the band system and for the hold-down plates (6 to 10) is provided.
6. Niederhalter nach Anspruch 5, dadurch gekennzeichnet, dass die Synchronisierung mechanisch erfolgt.6. down device according to claim 5, characterized in that the synchronization is mechanical.
7. Niederhalter nach Anspruch 5, dadurch gekennzeichnet, dass die Synchronisierung elektrisch bzw. elektronisch erfolgt.7. down device according to claim 5, characterized in that the synchronization is carried out electrically or electronically.
8. Niederhalter nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Niederhalter (4) positions- und/oder kraftgeregelt auf den Materialblock (11 ) absenkbar ist. 8. Down device according to one of claims 1 to 7, characterized in that the hold-down (4) position and / or force-controlled on the material block (11) is lowered.
9. Verfahren zum Betreiben eines Niederhalters (1) nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass der Niederhalter (4) während des Schneidvorgangs auf den Materialblöcken (11 ) abgesenkt ist und die Synchronisation zwischen Längsverfahrantrieb für den Aufnahmetisch (2) und für die Niederhalterplatten (6 bis 10) eingeschaltet ist, dass zum Wechseln der Materialblöcke (11 ) der Niederhalter (4) in eine obere Parkposition gefahren, die Synchronisation ausgeschaltet und die Materialblöcke (11 ) mittels des längsverfahr-angetriebenen Aufnahmetisches (2) vom Messer (12) fort bzw. zu diesem hin gefördert werden, und dass zum Einstellen des Mittenhalters (13) auf eine neue Materialblockbreite der Niederhalter (4) in die obere Parkposition gefahren und die Niederhalterplatten (6 bis 10) aus dem Kollisionsbereich des Mittenhalters (13) heraus längs verfahren wird, dass der Mittenhalter (13) zu einem entsprechenden Spalt (14) zwischen den Niederhalterplatten (6 bis 10) quer verfahren wird und dass die Niederhalterplatten (6 bis 10) zurück längs verfahren und auf den Materialblock (11 ) abgesenkt werden und die Synchronisation eingeschaltet wird. 9. A method for operating a hold-down device (1) according to any one of claims 5 to 8, characterized in that the hold-down (4) is lowered during the cutting operation on the material blocks (11) and the synchronization between Längsverfahrantrieb for the receiving table (2) and for the hold-down plates (6 to 10) is turned on that moved to change the material blocks (11) of the hold-down (4) in an upper parking position, the synchronization off and the material blocks (11) by means of längsverfahr-driven receiving table (2) from the knife (12) are conveyed away and that for setting the center holder (13) to a new material block width of the hold-down (4) moved to the upper parking position and the hold-down plates (6 to 10) from the collision area of the center holder (13 ) is moved longitudinally, that the center holder (13) to a corresponding gap (14) between the hold-down plates (6 to 10) is moved transversely and that the hold-down plates (6 to 10) moved back longitudinally and lowered onto the block of material (11) and the synchronization is turned on.
EP20060724480 2005-04-29 2006-04-21 Holding-down clamp for machines Active EP1888306B1 (en)

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DE102005020468A DE102005020468A1 (en) 2005-04-29 2005-04-29 Machine holding-down clamp for machines on which soft material blocks are machined or cut has bearing elements which are mounted on bars so that they are height-adjustable whereby bearing elements support holding-down clamp frame
PCT/EP2006/003658 WO2006117086A1 (en) 2005-04-29 2006-04-21 Holding-down clamp for machines

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EP1888306B1 EP1888306B1 (en) 2009-08-19

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CN102509753A (en) * 2011-11-10 2012-06-20 苏州晶雷光电照明科技有限公司 Cutting machine for LED production
CN103042546B (en) * 2011-12-27 2015-05-13 连云港富安紫菜机械有限公司 Fresh seaweed chopping device for achieving free-chopping of foreign bodies
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JP2007533479A (en) 2007-11-22
US20090163338A1 (en) 2009-06-25
KR20070069093A (en) 2007-07-02
DE502006004598D1 (en) 2009-10-01
EP1888306B1 (en) 2009-08-19
KR100799690B1 (en) 2008-02-01
ATE439957T1 (en) 2009-09-15
JP4094051B2 (en) 2008-06-04
DE102005020468A1 (en) 2006-11-02
CN100488737C (en) 2009-05-20
US7621704B2 (en) 2009-11-24
DK1888306T3 (en) 2009-12-21
CN1953852A (en) 2007-04-25
WO2006117086A1 (en) 2006-11-09

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