DE102023114964A1 - editing tool - Google Patents

Abstract

A machining tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370) for a device for machining flat workpieces comprises a carrier element (130c, 330c, 340c, 350c, 360c, 370c) with a connecting element (130e) for connection to a drive shaft (150, 160) that can be driven by a drive unit (162, 164). The connecting element (130e) is designed for a rotationally fixed connection to the drive shaft (150, 160) and defines an axis of rotation (D) of the machining tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370). The support element (130c, 330c, 340c, 350c, 360c, 370c) is formed symmetrically in a plane orthogonal to the axis of rotation (D) with respect to a first axis of symmetry (S1) running in the orthogonal plane and with respect to a second axis of symmetry (S2) running in the plane, wherein the first axis of symmetry (S1) and the second axis of symmetry (S2) intersect the axis of rotation (D). The extension of the support element (130c, 330c, 340c, 350c, 360c, 370c) along the first axis of symmetry (S1) is longer than the extension of the support element (130c, 330c, 340c, 350c, 360c, 370c) along the second axis of symmetry (S2).

Description

The invention relates to a machining tool for a device for machining flat workpieces, which comprises a carrier element with a connecting element for connection to a drive shaft that can be driven by a drive unit. The connecting element is designed for a rotationally fixed connection to the drive shaft and defines an axis of rotation of the machining tool. The carrier element is designed in a plane orthogonal to the axis of rotation symmetrically with respect to a first axis of symmetry running in the orthogonal plane and with respect to a second axis of symmetry running in the plane, wherein the first axis of symmetry and the second axis of symmetry intersect the axis of rotation. The invention further relates to a device for machining flat workpieces with at least two machining tools.

Various devices for machining flat workpieces are known in which rotating machining tools are used to machine the surface and/or the edges of the workpiece to be machined. One such device is known, for example, from the document DE 10 2007 022 194 B4 The machining unit of this device comprises machining heads arranged in a row next to one another with planetary head gears through which the cylindrical rotating machining tools of adjacent machining heads mesh so that the machining circles of adjacent machining heads overlap. This means that the entire surface and/or all edges of the workpiece are machined without the need for several machining units arranged one behind the other.

In other processing units of devices for processing flat workpieces, the cylindrical rotating processing tools are arranged in a row transverse to a processing direction of the workpieces to be processed. The entire processing unit can be moved back and forth transverse to the processing direction of the workpiece in order to avoid processing gaps between the tools.

The planetary head gears are relatively large and expensive. Replacing the machining tools is also complex. In devices where the entire machining unit is moved back and forth, an additional drive unit must be provided for this, with the machining unit itself containing the drive for driving the machining tools, so that large masses must be moved back and forth.

Based on this, it is the object of the invention to provide a machining tool and a device for machining flat workpieces, with which a simple full-surface machining of a workpiece is possible.

This object is achieved by a machining tool having the features of claim 1 and by a device having the features of claim 7. Advantageous further developments are specified in the dependent claims.

A machining tool with the features of claim 1 and a device for machining flat workpieces ensure that the machining tools can be arranged next to one another in such a way that their machining circles overlap. This means that it is sufficient to provide a single row of machining tools arranged next to one another in order to machine the entire surface and/or all edges of a flat workpiece. The longitudinal axes of the drive shafts connected to the machining tools or the axes of rotation of the machining tools are stationary. To compensate for height and/or to adapt to the contours of the workpiece, individual drive shafts can be moved along their longitudinal axis together with the machining tool. This can be done, for example, as in the document DE 10 2021 111 672 A1 described. Alternatively or additionally, the entire processing unit can be moved towards and away from a processing plane in which the workpiece to be processed is arranged. This can compensate for wear on the processing tools and/or adjust the device to the height of the flat workpieces to be processed. The processing tools enable a simple, cost-effective, space-saving design of the device.

An overlap of the machining circles of machining tools arranged next to one another is achieved in particular by the extension of the carrier element along the first axis of symmetry being longer than the extension of the carrier element along the second axis of symmetry. The connection of the connecting element of the machining tool to the drive shaft can be made via a screw connection, snap connection, clamp connection and/or plug connection in a manner known per se. The carrier plate of the machining tool preferably has a substantially elongated basic shape, i.e. the length of the carrier plate is greater than its width.

It is advantageous if the side of the carrier element facing away from the connecting element can be used as a grinding tool, a brushing tool or as It is designed as a chipping tool or is connected to a grinding tool, brushing tool or chipping tool. This allows the flat workpiece to be easily machined.

If the processing tool is designed as a grinding tool, a plurality of grinding sheets can be connected to the carrier element, which are arranged in radial planes containing the axis of rotation, with support material, in particular support fleece, preferably being arranged between the grinding sheets. The grinding sheets can protrude from the carrier element perpendicularly in the direction of the workpiece to be processed. This enables good processing of the workpiece. In particular, the grinding sheets can easily adapt to the contour of the workpiece.

If the processing tool is designed as a brush tool, a large number of bristles protruding vertically in the direction of the workpiece to be processed can be connected to the carrier element. This enables the workpiece to be processed well. In particular, the bristles can easily adapt to the contour of the workpiece.

If the processing tool is designed as a chipping tool, a large number of elements that protrude vertically in the direction of the workpiece to be processed can be connected to the carrier element. These chipping elements can be designed as cylindrical chipping elements and are also known as slag hammers. This allows slag that can form on the edges of a sheet metal blank during certain cutting processes to be removed easily and safely by chipping.

In the device for machining the edges and surfaces of flat workpieces, at least two machining tools are connected in a rotationally fixed manner, each with a drive shaft that can be driven by a drive unit, at least in the direction of rotation of the drive shaft. The machining tools are each mounted by the drive shaft on the machine frame so that they can rotate about a fixed axis of rotation that is perpendicular to the workpiece support. This enables the device to be constructed in a simple manner, since in particular no planetary heads and no units for moving the machining units and tools back and forth are required.

It is advantageous if the workpiece support comprises at least one transport unit that defines a transport plane in which the workpieces to be processed are transported for processing in a transport direction. The transport unit comprises at least one transport element, which can comprise a conveyor belt or a transport roller, in particular a roller conveyor with several transport rollers.

It is also advantageous if the at least two drive shafts with the processing tools are arranged in a single row transverse to the transport direction and/or processing direction of the workpiece to be processed, next to one another in a carrier unit, wherein the carrier unit is preferably aligned parallel to the workpiece support. The carrier unit, the drive shafts and the processing tools are part of a processing unit of the device. The processing unit can also comprise at least one drive unit for driving the drive shafts. This enables a compact design of the device.

It is particularly advantageous if the drive shafts are first drive shafts, if the two processing tools are two first processing tools, if the device comprises at least two second processing tools according to one of claims 1 to 6. The second processing tools are each connected in a rotationally fixed manner to a second drive shaft that can be driven with the aid of a drive unit, at least in the drive rotation direction of the drive shaft. The second processing tools are each rotatably mounted by one of the second drive shafts on the machine frame about a fixed axis of rotation that is perpendicular to the workpiece support. The at least two second drive shafts are arranged in a second row transverse to the transport and/or processing direction of the workpiece to be processed, next to one another in a second carrier unit, the second carrier unit preferably being arranged parallel to the workpiece support and in particular parallel to the first carrier unit. This means that there are two rows of processing tools arranged one behind the other in the processing direction, which enable double and thus intensive processing of all areas of the flat workpiece with a simple structure of the device. A processing unit of the device can comprise the first and second carrier units. This allows both rows of machining tools to be arranged compactly and, in particular, to be driven using only a single drive unit.

It can be advantageous if the first drive shafts with the first machining tools of the first row and the second drive shafts with the second machining tools of the second row have the same fixed distance from each other and the first drive shafts of the first row are spaced apart from the second drive shafts of the second row have a lateral offset transverse to the transport direction of half the distance between the drive shafts. This enables intensive processing of the flat workpiece with a simple device structure.

It is also advantageous if the first processing tools of the first row and the second processing tools of the second row are arranged and driven in such a way that the processing circles of the first processing tools of the first row overlap with the processing circles of the second processing tools of the second row. Alternatively, a transport element, in particular a support roller, can be arranged between the processing tools of the first row and the processing tools of the second row. This enables a compact design of the device and safe processing of the workpieces.

It is particularly advantageous if the drive shafts and the machining tools are arranged and designed next to one another in such a way that the spheres of action of their machining tools overlap, with the drive unit or drive units preferably driving all drive shafts with the machining tools in the same direction of rotation. This ensures that both the edges and the surface of the workpiece are machined safely.

It is also advantageous if the processing tools are arranged and designed in such a way that the grinding sheets or bristles or chipping elements of the processing tools are elastically deformed when processing the flat workpieces and are thereby deflected and pulled over the edge and the surface of the workpiece. This ensures that both the edges and the surface of the workpiece are processed safely.

The workpiece support can comprise at least one transport unit with at least one transport element. The transport element can in particular comprise a conveyor belt or several transport rollers. The conveyor belt or the transport rollers define a transport plane in which the workpieces are transported for processing. When processing the workpiece, the drive shafts of the processing tools can be arranged above the transport plane or above a processing plane, so that the processing tools at least contact the top of the workpiece and the upper edges of the workpiece.

If the drive shafts of the machining tools are arranged below the transport plane when machining the workpiece, the machining tools contact at least the underside and the lower edges of the workpiece. The workpiece can then be pressed against the machining tools by a pressure belt arranged above the machining tools or by pressure rollers arranged above the machining tools. The pressure belt and/or the pressure rollers can be driven so that the workpiece is guided past the machining tools in the machining direction. There can be an adjustment unit by means of which the distance of the pressure belt or the pressure rollers from the machining plane and/or the transport plane can be adjusted depending on the thickness of the workpiece to be machined. In other embodiments, other pressure means can also be provided by means of which the workpiece to be machined is pressed against the machining tools.

In embodiments with a rotating pressure belt, in special embodiments this can be sucked in with the help of a vacuum unit in such a way that it has a safe distance from the processing tools at least in the area of the processing tools arranged below the pressure belt. As a result, the pressure belt in the area of the processing tools does not sag so much that it comes into contact with the processing tools. As an alternative to the vacuum unit, the rotating pressure belt can be arranged or held at a safe distance from the processing tools at least in the area of the processing tools arranged below the pressure belt with the help of a magnet unit. As a result, the pressure belt in the area of the processing tools does not sag so much that it comes into contact with the processing tools. For this purpose, the pressure belt has in particular ferromagnetic components, in particular iron particles, or is designed as a steel belt. The magnet unit is in particular an electromagnet, which is preferably only activated when there is no workpiece in the area of the processing tools.

Adjacent machining tools arranged in a row transverse to the machining direction are arranged and driven in a synchronized manner such that the adjacent machining tools mesh, i.e. that the machining circles of adjacent machining tools overlap.

The size of the machining tools and the gaps between the adjacent machining tools and between the machining tools and the transport elements are adapted to the size of the workpieces to be machined in such a way that the workpieces can be When machining the workpieces from below, do not fall into the gaps.

A flat workpiece to be machined within the meaning of the invention is in particular a workpiece which is arranged during or for machining in such a way that its width and/or length are greater than its height.

• 1 eine schematische Seitenansicht einer ersten Vorrichtung zur Bearbeitung flächiger Werkstücke;
• 2 eine schematische perspektivische Darstellung einer ersten Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten ersten Bearbeitungswerkzeugen der Vorrichtung nach 1;
• 3 eine schematische Seitenansicht einer zweiten Vorrichtung zur Bearbeitung flächiger Werkstücke;
• 4 eine schematische perspektivische Darstellung einer zweiten Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten zweiten Bearbeitungswerkzeugen der Vorrichtung nach 3;
• 5 eine schematische Seitenansicht einer dritten Vorrichtung zur Bearbeitung flächiger Werkstücke;
• 6 eine schematische perspektivische Darstellung einer ersten Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten ersten Bearbeitungswerkzeugen der Vorrichtung nach 5;
• 7 eine schematische Seitenansicht einer vierten Vorrichtung zur Bearbeitung flächiger Werkstücke;
• 8 eine schematische perspektivische Darstellung einer zweiten Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten zweiten Bearbeitungswerkzeugen der Vorrichtung nach 7;
• 9 eine schematische Draufsicht auf die erste Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten Bearbeitungswerkzeugen;
• 10a einen Teil der Bearbeitungswerkzeuge nach 9 bei einer Drehung der ersten Reihe mit Bearbeitungswerkzeugen um 10°entgegen Uhrzeigersinn und der zweiten Reihe mit Bearbeitungswerkzeugen um 10° in Uhrzeigersinn;
• 10b einen Teil der Bearbeitungswerkzeuge nach 9 bei einer Drehung der ersten Reihe mit Bearbeitungswerkzeugen und der zweiten Reihe mit Bearbeitungswerkzeugen jeweils um 10° in Uhrzeigersinn;
• 11 eine schematische Draufsicht auf eine weitere Bearbeitungseinheit mit in zwei Reihen hintereinander angeordneten Bearbeitungswerkzeugen, bei der zwischen den beiden Reihen eine Stützrolle angeordnet ist;
• 12a einen Teil der Bearbeitungswerkzeuge nach 11 bei einer Drehung der ersten Reihe mit Bearbeitungswerkzeugen um 10°entgegen Uhrzeigersinn und der zweiten Reihe mit Bearbeitungswerkzeugen um 10° in Uhrzeigersinn;
• 12b einen Teil der Bearbeitungswerkzeuge nach 11 bei einer Drehung der ersten Reihe mit Bearbeitungswerkzeugen und der zweiten Reihe mit Bearbeitungswerkzeugen jeweils um 10° in Uhrzeigersinn
• 13a einen Teil der Bearbeitungswerkzeuge nach 9, wobei die Kontaktbereiche der Bearbeitungswerkzeuge an der Vorderkante und der Hinterkante des zu bearbeitenden Werkstücks bei einem gleichläufigen Antrieb der Bearbeitungswerkzeuge schematisch dargestellt sind;
• 13b einen Teil der Bearbeitungswerkzeuge nach 9, wobei die Kontaktbereiche der Bearbeitungswerkzeuge an der Vorderkante und der Hinterkante des zu bearbeitenden Werkstücks bei einem gegenläufigen Antrieb der Bearbeitungswerkzeuge in Uhrzeigersinn schematisch dargestellt sind;
• 14 eine Seitenansicht der ersten Bearbeitungseinheit mit einem Ausbruch an einem Bearbeitungswerkzeug;
• 15 eine vergrößerte Schnittdarstellung des im Ausbruch angeordneten Bearbeitungswerkzeugs;
• 16 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer ersten Grundform;
• 17 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 16;
• 18 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer zweiten Grundform;
• 19 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 18;
• 20 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer dritten Grundform;
• 21 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 20;
• 22 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer vierten Grundform;
• 23 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 22;
• 24 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer fünften Grundform;
• 25 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 24;
• 26 eine schematische Draufsicht auf ein Bearbeitungswerkzeug mit einer sechsten Grundform;
• 27 eine schematische Seitenansicht des Bearbeitungswerkzeugs nach 26;
• 28 eine schematische Ansicht des ersten Bearbeitungswerkzeugs nach den 5 und 6; und
• 29 eine schematische Ansicht des zweiten Bearbeitungswerkzeugs nach den 7 und 8.

Embodiments of the invention are explained in more detail below with reference to the figures, in which:

• 1 a schematic side view of a first device for machining flat workpieces;
• 2 a schematic perspective view of a first processing unit with first processing tools of the device according to 1 ;
• 3 a schematic side view of a second device for machining flat workpieces;
• 4 a schematic perspective view of a second processing unit with second processing tools of the device according to 3 ;
• 5 a schematic side view of a third device for machining flat workpieces;
• 6 a schematic perspective view of a first processing unit with first processing tools of the device according to 5 ;
• 7 a schematic side view of a fourth device for machining flat workpieces;
• 8 a schematic perspective view of a second processing unit with second processing tools of the device according to 7 ;
• 9 a schematic plan view of the first machining unit with machining tools arranged in two rows one behind the other;
• 10a some of the processing tools 9 when the first row of machining tools is rotated 10° anti-clockwise and the second row of machining tools is rotated 10° clockwise;
• 10b some of the processing tools 9 when the first row of machining tools and the second row of machining tools are each rotated clockwise by 10°;
• 11 a schematic plan view of a further machining unit with machining tools arranged in two rows one behind the other, with a support roller arranged between the two rows;
• 12a some of the processing tools 11 when the first row of machining tools is rotated 10° anti-clockwise and the second row of machining tools is rotated 10° clockwise;
• 12b some of the processing tools 11 when the first row of machining tools and the second row of machining tools are each rotated 10° clockwise
• 13a some of the processing tools 9 , wherein the contact areas of the machining tools on the front edge and the rear edge of the workpiece to be machined are shown schematically with a synchronous drive of the machining tools;
• 13b some of the processing tools 9 , wherein the contact areas of the machining tools on the front edge and the rear edge of the workpiece to be machined are shown schematically with a counter-rotating drive of the machining tools in a clockwise direction;
• 14 a side view of the first machining unit with a breakout on a machining tool;
• 15 an enlarged sectional view of the machining tool arranged in the breakout;
• 16 a schematic plan view of a machining tool with a first basic shape;
• 17 a schematic side view of the machining tool according to 16 ;
• 18 a schematic plan view of a machining tool with a second basic shape;
• 19 a schematic side view of the machining tool according to 18 ;
• 20 a schematic plan view of a machining tool with a third basic shape;
• 21 a schematic side view of the machining tool according to 20 ;
• 22 a schematic plan view of a machining tool with a fourth basic shape;
• 23 a schematic side view of the machining tool according to 22 ;
• 24 a schematic plan view of a machining tool with a fifth basic shape;
• 25 a schematic side view of the machining tool according to 24 ;
• 26 a schematic plan view of a machining tool with a sixth basic shape;
• 27 a schematic side view of the machining tool according to 26 ;
• 28 a schematic view of the first machining tool according to the 5 and 6 ; and
• 29 a schematic view of the second machining tool according to the 7 and 8 .

1 shows a schematic side view of a first device 20 for processing flat workpieces. A workpiece 10 to be processed rests on a first belt conveyor 102 and is moved with the aid of the latter in the processing and transport direction P1 of a processing unit 16 with processing tools 110, 112 arranged in a row. A further belt conveyor 104 is provided in order to transport the workpiece away after processing by the processing unit 16. Pressure rollers are arranged above the processing unit 16, which are preferably driven by means of a drive unit and, when the workpiece 10 is processed by the processing unit 16, exert a pressing force in the direction of the processing tools 110, 112 and a driving force in the processing direction P1 on the workpiece 10.

The machining tools 110, 112 are each connected in a rotationally fixed manner to a drive shaft 160. The drive shafts 150 are connected via a gear 108, preferably via a gear transmission with spur gears, to a 5 not shown drive unit of the processing unit 16 in such a way that all drive shafts 150 and thus all processing tools 110, 112 are driven at the same speed. Immediately adjacent processing tools 110, 112 are thus driven synchronously. The processing tools 110, 112 mesh, ie their processing circles overlap. Immediately adjacent processing tools 110, 112 are arranged offset by 90° to one another for this purpose, ie the processing tool 112 is arranged 90° around its axis of rotation in a clockwise direction P2 relative to the processing tool 110. The processing tools 110, 112 are connected in a rotationally fixed manner to their respective drive shaft 150 via a positive or non-positive connection.

As in 2 As can be seen, the center axes of the drive shafts 150 of the single row of machining tools 110 to 128 in this embodiment and thus the axes of rotation of the machining tools 110 to 128 are arranged in a first plane E2 orthogonal to the machining direction P1.

When the workpiece 10 is fed to the processing unit 16 with the aid of the belt conveyor 102, the height of the workpiece 10 is detected with the aid of a sensor unit (not shown) and the pressure rollers 170 are then moved upwards starting from the height determined with the aid of the sensor unit in order to enable correct processing of the workpiece 10. For this purpose, a control unit controls a drive unit for changing the distance of the pressure rollers 170 to the transport plane E3 defined by the belt conveyor 102 starting from the determined height in such a way that the pressure rollers 170 are moved upwards before the workpiece 10 reaches the first pressure roller 170 serving as an infeed roller. The processing unit 16 can be moved with the aid of a drive unit (not shown) in such a way that a processing plane defined by the upper edge of the processing tools 110 to 128 can be moved relative to the transport plane E3.

2 shows a schematic perspective view of the first processing unit 16 with first processing tools 110 to 148 of the device 20 arranged in the single row according to 1 The processing tools 110 to 128 are designed as grinding tools, wherein a plurality of grinding sheets are connected to a carrier element of the respective processing tool 110 to 148, which are arranged in radial planes containing the axis of rotation, wherein support material, in particular support fleece, is preferably arranged between the grinding sheets. The processing tools 110 to 128 all have the same direction of rotation.

3 shows a schematic side view of a second device 30 for machining flat workpieces 10. The second device 30 differs from the first device 20 by a second row of machining tools 130 to 148. In the machining direction P1, the second row is upstream of the first row in a plane E1 orthogonal to the transport plane E3 and the transport direction P1. Between the processing tools 130 to 148 of the second row and the processing tools 110 to 128 of the first row there is a support roller 28 which serves to support and guide the workpiece 10 to be processed. The processing unit 26 can be moved with the aid of a drive unit (not shown) such that a processing plane defined by the upper edge of the processing tools 110 to 148 can be displaced relative to the transport plane E3. The support roller 26 is arranged in the transport plane E3, i.e. a tangent of the support roller lies in the transport plane E3. In other embodiments the support roller 26 can be moved with the aid of a drive unit such that a tangent of the support roller 26 running parallel to the processing plane E3 can be arranged at a distance from the transport plane E3. The distance of the tangent to the transport plane E3 can thus be adjusted with the aid of the drive unit. Alternatively or additionally, it is possible to set the machining plane of the machining tools 130 to 148 of the first row and the machining plane of the machining tools 110 to 128 of the second row differently.

The remaining structure and function of the processing unit 26 are consistent with the processing unit 16 according to the 1 and 2 Likewise, the remaining structure and function of the second device 30 correspond to the first device 20 according to the 1 and 2 Elements with the same structure or the same function have the same reference symbols.

4 shows a schematic perspective view of a second processing unit 26 with processing tools 110 to 148 arranged in two rows one behind the other of the second device 30 according to 3 .

In the first device 20 and the second device 30, the machining circles of adjacent machining tools 110 to 148 of each row overlap so that there are no gaps between the machining areas of adjacent machining tools 110 to 148, so that when machining the workpiece 10, its surface and the edges of the workpiece 10 are completely machined by the machining tools 110 to 148 of only one row. The machining tools 110 to 148 of the first row and the second row all have the same direction of rotation.

In other embodiments, all machining tools 110 to 148 of one row have the same direction of rotation P2 and the machining tools 110 to 148 of the other row have the opposite direction of rotation. Alternatively, the machining tools 110 to 148 of the first row and/or the machining tools 110 to 148 of the second row can rotate in opposite directions.

As an alternative to the processing tools 110 to 148, the processing tools can also be designed as brushing tools, with a carrier element of each processing tool then having a plurality of bristles protruding vertically in the direction of the workpiece 10 to be processed connected to it. As an alternative to the processing tools 110 to 148, the processing tools can also be designed as chipping tools, with a carrier element of each processing tool then having a plurality of chipping elements protruding vertically in the direction of the workpiece 10 to be processed connected to it.

In the devices 20, 30, the workpiece 10 is machined from below, i.e. the underside and/or the lower edges of the workpiece 10 are machined using the machining tools 110 to 148. In other embodiments, the machining unit 16, 26 is arranged above the machining plane E3 and the workpiece 10 to be machined is guided past below the machining unit 16, 26 for machining, for example on a continuous belt conveyor 102 or on a roller conveyor. The planes E1 and E2 are orthogonal to the transport plane E3 and orthogonal to the machining and transport direction P1.

In other embodiments, individual drive shafts 150, 160 can be moved along their longitudinal axis together with the machining tool 110 to 148, 210 to 248 for height compensation and/or to adapt to contours of the workpiece 10. This can be done, for example, as in the document DE 10 2021 111 672 A1 described.

5 shows a schematic side view of a third device 100 for processing flat workpieces. The workpiece 10 to be processed rests on the first belt conveyor 102 and is moved with its help in the processing and transport direction P1 of a third processing unit 106 with processing tools 110, 112, 130 arranged in two rows. The further belt conveyor 104 is provided to transport the workpiece 10 away after processing by the processing unit 106. Pressure rollers are arranged above the processing unit 106, which are preferably driven by means of a drive unit and, when the workpiece 10 is processed by the processing unit 106, exert a pressure force in the direction of the processing tools 110, 112, 130. and exert a driving force on the workpiece 10 in the machining direction P1.

The machining tools 110, 112, 130 are each connected in a rotationally fixed manner to a drive shaft 150, 160. The drive shafts 150, 160 are connected via a gear 108, preferably via a gear transmission with spur gears, to a 5 not shown drive unit of the processing unit 106 in such a way that all drive shafts 150, 160 and thus all processing tools 110, 112, 130 are driven at the same speed. Immediately adjacent processing tools 110, 112 are thus driven synchronously. The processing tools 110, 112 mesh, ie their processing circles overlap. Immediately adjacent processing tools 110, 112 are arranged offset by 90° to one another for this purpose, ie the processing tool 112 is arranged 90° around its axis of rotation in a clockwise direction P2 relative to the processing tool 110. The processing tools 110, 112 are connected in a rotationally fixed manner to their respective drive shafts 150, 160 via a positive or non-positive connection.

As in 6 As can be seen, the center axes of the drive shafts 160 of the first row with machining tools 130 to 148 and thus the axes of rotation of the machining tools 130 to 148 are arranged in a first plane E1 orthogonal to the machining direction P1. The center axes of the drive shafts 150 of the second row with machining tools 110 to 128 and thus the axes of rotation of the machining tools 110 to 128 are arranged in a first plane E2 orthogonal to the machining direction P1 downstream of the plane E1.

In the present embodiment, a support and guide element 103 is arranged between the first belt conveyor 102 and the processing unit 106, by means of which the workpiece 10 is precisely fed to the processing unit 106. In other embodiments, the support and guide element 103 can be dispensed with.

When the workpiece 10 is fed to the processing unit 106 with the aid of the belt conveyor 102, the height of the workpiece 10 is detected with the aid of a sensor unit (not shown) and the pressure rollers 170 are then moved upwards starting from the height determined with the aid of the sensor unit in order to enable correct processing of the workpiece 10. For this purpose, a control unit controls a drive unit for changing the distance of the pressure rollers 170 to the transport plane E3 defined by the belt conveyor 102 starting from the determined height in such a way that the pressure rollers 170 are moved upwards before the workpiece 10 reaches the first pressure roller 170 serving as an infeed roller. The processing unit 106 can be moved with the aid of a drive unit (not shown) in such a way that a processing plane defined by the upper edge of the processing tools 110 to 148 can be moved relative to the transport plane E3.

6 shows a schematic perspective view of the third processing unit 106 with first processing tools 110 to 148 of the device 100 arranged in two rows one behind the other 1 The processing tools 110 to 148 are designed as grinding tools, wherein a plurality of grinding sheets are connected to a carrier element of the respective processing tool 110 to 148, which are arranged in radial planes containing the axis of rotation, wherein support material, in particular support fleece, is preferably arranged between the grinding sheets.

7 shows a schematic side view of a fourth device 200 for machining flat workpieces 10. The fourth device 200 differs from the third device by the machining tools 210 to 248 of the machining unit 206. The remaining structure and function of the machining unit 206 are consistent with the machining unit 106 according to the 5 and 6 Likewise, the remaining structure and function of the fourth device 200 correspond to the third device 100 according to the 5 and 6 Elements with the same structure or the same function have the same reference symbols.

8 shows a schematic perspective view of a fourth processing unit 206 with second processing tools 210 to 248 arranged in two rows one behind the other of the fourth device 200 according to 7 The machining tools 210 to 248 are designed as cutting tools, with a plurality of cutting elements protruding vertically in the direction of the workpiece to be machined being connected to a carrier element of the respective machining tool 210 to 248. One of these stop elements is designated by the reference numeral 211 as an example.

In the third device 100 and the fourth device 200, the machining circles of adjacent machining tools 110 to 148, 210 to 248 of each row overlap so that there are no gaps between the machining areas of adjacent machining tools 110 to 148, 210 to 248, so that when machining the workpiece 10, its surface and the edges of the workpiece 10 are completely machined by the machining tools 110 to 148 of only one row. The machining tools 110 to 148, 210 to 248 of the first row and the second row all have the same direction of rotation.

In other embodiments, all machining tools 110 to 148, 210 to 248 of one row have the same direction of rotation P2 and the machining tools 110 to 148, 210 to 248 of the other row have the opposite direction of rotation. Alternatively, the machining tools 110 to 148, 210 to 248 of the first row and/or the machining tools 110 to 148, 210 to 248 of the second row can rotate in opposite directions.

As an alternative to the processing tools 110 to 148, 210 to 248, the processing tools can also be designed as brushing tools, wherein a plurality of bristles projecting perpendicularly in the direction of the workpiece 10 to be processed are then connected to a carrier element of each processing tool.

In the devices 100, 200, the workpiece 10 is machined from below, i.e. the underside and/or the lower edges of the workpiece 10 are machined using the machining tools 110 to 148, 210 to 248. In other embodiments, the machining unit 106, 206 is arranged above the transport plane E3 and the workpiece 10 to be machined is guided past the machining unit 106, 206 for machining, for example on a continuous belt conveyor 102 or on a roller conveyor. The planes E1 and E2 are orthogonal to the transport plane E3 and orthogonal to the machining and transport direction P1.

In other embodiments, individual drive shafts 150, 160 can be moved along their longitudinal axis together with the machining tool 110 to 148, 210 to 248 for height compensation and/or for adaptation to contours of the workpiece 10. This can be done, for example, as in the document DE 10 2021 111 672 A1 described.

The processing units 106, 206 can each be moved with the aid of a drive unit (not shown) such that a processing plane defined by the upper edge of the processing tools 110 to 148, 210 to 248 can be displaced relative to the transport plane E3. Alternatively, it is also possible to set the processing plane of the processing tools 130 to 148, 230 to 248 of the first row and the processing plane of the processing tools 110 to 128, 210 to 228 of the second row differently.

9 shows a schematic plan view of the third machining unit 106 with machining tools 110 to 148 arranged one behind the other in two rows in an exemplary starting position. The distance between the axes of rotation D of all adjacent machining tools 110 to 128; 130 to 148 of each row is the same. The axes of rotation D of adjacent machining tools 130 to 148 in the first row have the same distance transverse to the machining direction P1 as the axes of rotation D of adjacent machining tools 110 to 128 in the first row. The distance between the plane E1 and the plane E2 is equal to the distance between adjacent machining tools 110, 122; 130, 132. In other embodiments, the planes E1 and E2 are further apart than the distance between adjacent machining tools 110, 122; 130, 132. The two rows have a lateral offset of half the distance of the rotation axes of adjacent machining tools 110 to 128, 130 to 148). As a result, the rotation axis D of the machining tool 130 is arranged centrally between the rotation axes D of the machining tools 110, 112, as seen in the transport direction P1. This can be done in particular by projecting the rotation axes of the rotation axes D of the machining tools 130 to 148 into the plane E2, in which the rotation axes D of the machining tools (110 to 128) of the second row are arranged.

10a shows a part of the machining tools 110 to 116, 130 to 136 after 9 when the machining tools 130 to 136 of the first row are rotated from the 9 shown starting position by 10° counterclockwise and the machining tools 110 to 116 of the second row from the 9 shown starting position by 10° clockwise. 10b shows a part of the machining tools 110 to 116, 130 to 136 after 9 upon rotation of the machining tools 130 to 136 of the first row and the machining tools 110 to 116 of the second row from the 9 shown starting position by 10° clockwise. Furthermore, the machining circles of the machining tools 110 to 116, 130 to 136 are in the 10a and 10b designated by the reference symbol K.

11 shows a schematic top view of the further processing unit 306 with processing tools 110 to 148 arranged in two rows one behind the other. In the processing unit 306, a freely rotatable support roller 308 is arranged between the two rows. In other embodiments, the support roller is driven and/or several support rollers 308 or a belt conveyor are arranged between the two rows. The processing unit essentially corresponds to the processing unit 26 according to 3 agree.

12a shows a part of the machining tools 110 to 116, 130 to 136 after 11 upon rotation of the machining tools 130 to 136 of the first row by 10° counterclockwise and of the machining tools 110 to 116 of the second row by 10° clockwise, wherein the support roller 308 is arranged between the machining tools 110 to 116, 130 to 136 of the two rows.

12b shows a part of the machining tools 110 to 116, 130 to 136 after 11 upon rotation of the machining tools 130 to 136 of the first row and the machining tools 110 to 116 of the second row by 10° in a clockwise direction, wherein the support roller 308 is arranged between the machining tools 110 to 116, 130 to 136 of the two rows.

13a shows a part of the machining tools 110 to 116 of the second row after 9 , wherein the contact areas of the machining tools 110 to 116 on the front edge of the workpiece 10 to be machined are schematically shown by thick solid lines and on the rear edge of the workpiece 10 to be machined by dotted lines with a co-rotating drive of the machining tools 110 to 116 in a clockwise direction P2.

13b shows a part of the machining tools 110 to 116 of the second row after 9 , wherein the contact areas of the machining tools 110 to 116 are schematically shown at the front edge of the workpiece 10 to be machined by thick solid lines and at the rear edge of the workpiece 10 to be machined by dotted lines with a counter-rotating drive of the machining tools P2, P3.

14 shows a side view of the third machining unit 106 with a breakout on the machining tool 130. 15 shows an enlarged sectional view of the machining tool 130 arranged in the cutout. The machining tool is connected to the drive shaft 160 with a screw 130a. For this purpose, the screw 130a is screwed through an opening 130b into an internal thread 160a introduced into a front opening of the drive shaft 160. The screw 130a and the opening 130b form a connecting element 130e, by means of which a carrier plate 130c of the machining tool 130 can be connected to the drive shaft 160 in a rotationally fixed manner. In the present embodiment, the connection between the drive shaft 160 and the machining tool 130 is made via a force-locking connection. In other embodiments, a form-locking connection can also be provided for connecting the drive shaft 160 and the machining tool 130.

16 shows a schematic plan view of the machining tool 130 and 17 a schematic side view of the machining tool 130. The carrier plate 130c of the machining tool 130 has a first elliptical basic shape with the length L and the width B. The width B is 50% of the length. In other embodiments, the width has a value in the range of 30% to 60% of the length. The carrier plate 130c is symmetrical to both the axis of symmetry S1 and the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 130c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°.

18 shows a schematic plan view of a machining tool 330 and 19 a schematic side view of the machining tool 330. A carrier plate 330c of the machining tool 330 has a second basic shape with the length L and the width B. The width B is 50% of the length. In other embodiments, the width has a value in the range of 30% to 60% of the length. The carrier plate 330c is symmetrical to both the axis of symmetry S1 and the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 330c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°. The second basic shape has a rectangular central section, to which semicircular cuts adjoin on both sides in the longitudinal direction.

20 shows a schematic plan view of a machining tool 340 and 21 a schematic side view of the machining tool 340. A carrier plate 340c of the machining tool 340 has a third basic shape with the length L and the width B. The width B is 50% of the length. In other embodiments, the width has a value in the range of 30% to 60% of the length. The carrier plate 340c is symmetrical to both the axis of symmetry S1 and the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 340c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°. The third basic shape has a rectangular central section, to which trapezoidal sections tapering towards the ends are connected in the longitudinal direction on both sides.

22 shows a schematic plan view of a machining tool 350 and 23 one schematic side view of the machining tool 350. A carrier plate 350c of the machining tool 350 has a fourth basic shape with the length L and the width B. The width B is 50% of the length. In other embodiments, the width has a value in the range of 30% to 60% of the length. The carrier plate 350c is symmetrical both to the axis of symmetry S1 and to the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 350c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°. The fourth basic shape has a rectangular central section, to which triangular cuts are connected in the longitudinal direction on both sides, tapering towards the ends. The triangular cuts are equilateral or at least isosceles.

24 shows a schematic top view of a machining tool 360 and 25 a schematic side view of the machining tool 360. A carrier plate 360c of the machining tool 360 has a fifth basic shape with the length L and the width B. The width B is 50% of the length. In other embodiments, the width has a value in the range of 30% to 60% of the length. The carrier plate 360c is symmetrical to both the axis of symmetry S1 and the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 360c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°. The fifth basic shape is rectangular.

26 shows a schematic plan view of a machining tool 370 and 27 a schematic side view of the machining tool 370. A carrier plate 370c of the machining tool 370 has a sixth basic shape with the length L and the width B. The width B at the axis of symmetry S2 is 25% of the length. In other embodiments, the width at the axis of symmetry has a value in the range of 10% to 50% of the length. The carrier plate 370c is symmetrical to both the axis of symmetry S1 and the axis of symmetry S2. The axes of symmetry S1, S2 run in a plane orthogonal to the axis of rotation D, which runs through the carrier plate 370c. Both the axis of symmetry S1 and the axis of symmetry S2 intersect the axis of rotation D at an angle of 90°. The sixth basic shape has the outline of the number 8. The maximum width B2 of the carrier plate 370c has a value in the range of 30% to 60% of the length L.

In the case of the processing tools 330 to 370, other processing means, such as chipping means or chipping pins 211 and/or bristles, can be connected to the respective carrier plates 330c to 370c instead of the grinding sheets 130d or in addition to the grinding sheets 130d.

28 shows a schematic view of the first machining tool 130 according to the 5 and 6 . In 28 the arrangement of the sanding sheets 130d, which protrude perpendicularly from the carrier plate 130c in the direction of the workpiece 10 to be machined and are connected to it, is clearly visible. In other embodiments, a supporting fleece is arranged between the sanding sheets 130d.

29 shows a schematic view of the second machining tool 230 according to the 7 and 8 . In 29 the arrangement of the cylindrical knock-off elements 211, which protrude perpendicularly from the carrier plate 130c in the direction of the workpiece 10 to be machined and are connected to it, is clearly visible. These elements are also referred to as knock-off pins. In other embodiments, the knock-off pins can also have a different shape, in particular a different cross-section.

All of the basic shapes of the machining tools shown can be used in a device for machining flat workpieces. In the machining tools of the embodiments, the length L is greater than the width B and greater than the maximum width B2.

In embodiments in which the drive shafts 150, 160 of the processing tools 110 to 148, 210 to 248 are arranged below the transport plane E3 during the processing of the workpiece 10, the processing tools 110 to 148, 210 to 248 contact at least the underside and the lower edges of the workpiece 10. The workpiece 10 can then be pressed against the processing tools 110 to 148, 210 to 248 by a pressure roller 170 arranged above the processing tools 110 to 148, 210 to 248 or by at least one pressure belt arranged above the processing tools 110 to 148, 210 to 248. The pressure belt and/or the pressure rollers 170 can be driven so that the workpiece 10 is guided past the processing tools 110 to 148, 210 to 248 in the processing direction P1. An adjustment unit can be provided by which the distance of the pressure belt or the pressure rollers 170 to the processing plane and/or to the transport plane E3 can be adjusted depending on the thickness of the workpiece 10 to be processed. In other embodiments, other pressure means can also be provided by which the workpiece 10 to be machined is pressed against the machining tools 110 to 148, 210 to 248.

In embodiments with a circumferential pressure belt, in special embodiments this can be sucked in with the aid of a vacuum unit in such a way that it has a safe distance from the processing tools 110 to 148, 210 to 248 at least in the area of the processing tools 110 to 148, 210 to 248 arranged below the pressure belt. As a result, the pressure belt in the area of the processing tools 110 to 148, 210 to 248 does not sag in such a way that it contacts the processing tools 110 to 148, 210 to 248. As an alternative to the vacuum unit, the rotating pressure belt can be arranged or held at a safe distance from the processing tools 110 to 148, 210 to 248, at least in the area of the processing tools 110 to 148, 210 to 248 arranged below the pressure belt, using a magnet unit. As a result, the pressure belt in the area of the processing tools 110 to 148, 210 to 248 does not sag in such a way that it contacts the processing tools 110 to 148, 210 to 248. For this purpose, the pressure belt has in particular ferromagnetic components, in particular iron particles, or is designed as a steel belt. The magnet unit is in particular an electromagnet, which is preferably only activated when there is no workpiece in the area of the processing tools 110 to 148, 210 to 248.

list of reference symbols

10

workpiece

20, 30, 100, 200

device

102, 104

belt conveyor

103

support and guide element

16, 26, 106, 206, 306

processing unit

108

transmission

110 to 148

editing tool

210 to 248, 330, 340, 350, 360, 370 111

cutting pin

130a

screw

130b

opening

130c, 330c, 340c, 350c, 360c, 370c

carrier plate

130d

sanding sheet

130e

connecting element

150, 160

drive shaft

160a

internal thread

162, 164

drive motor

170

pressure roller

28, 308

support roller

P1

transport and processing direction

P2

clockwise rotation

P3

counterclockwise rotation

E1, E2, E3

level

D

axis of rotation

S1, S2

axis of symmetry

L

length

B

Width

K

processing group

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 10 2007 022 194 B4 [0002]
• DE 10 2021 111 672 A1 [0007, 0040, 0053]

Claims (14)

Machining tool for a device for machining flat workpieces, with a carrier element (130c, 330c, 340c, 350c, 360c, 370c) with a connecting element (130e) for connection to a drive shaft (150, 160) that can be driven by a drive unit, wherein the connecting element (130e) is designed for rotationally fixed connection to the drive shaft (150, 160) and defines an axis of rotation (D) of the machining tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370), wherein the carrier element (130c, 330c, 340c, 350c, 360c, 370c) is arranged in a plane orthogonal to the axis of rotation (D) symmetrically with respect to a first in the orthogonal plane extending axis of symmetry (S1) and in relation to a second axis of symmetry (S2) extending in the plane, wherein the first and the second axes of symmetry (S1, S2) intersect the axis of rotation (D), characterized in that the extension of the carrier element (130c, 330c, 340c, 350c, 360c, 370c) along the first axis of symmetry (S1) is longer than the extension of the carrier element (130c, 330c, 340c, 350c, 360c, 370c) along the second axis of symmetry (S2). machining tool after claim 1 , characterized in that the carrier element (130c, 330c, 340c, 350c, 360c, 370c) has a substantially elongated basic shape. Processing tool according to one of the preceding claims, characterized in that the side of the carrier element (130c, 330c, 340c, 350c, 360c, 370c) facing away from the connecting element is designed as a grinding tool, as a brushing tool or as a chipping tool or is connected to a grinding tool, brushing tool or chipping tool. Machining tool according to one of the preceding claims, characterized in that the machining tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370) is designed as a grinding tool (110 to 148), wherein a plurality of grinding sheets (130d) are connected to the carrier element (130c, 330c, 340c, 350c, 360c, 370c), which are arranged in radial planes containing the axis of rotation (D), wherein support material, in particular support fleece, is preferably arranged between the grinding sheets (130d). Processing tool according to one of the preceding claims, characterized in that the processing tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370) is designed as a brushing tool, wherein a plurality of bristles projecting perpendicularly in the direction of the workpiece (10) to be processed are connected to the carrier element (130c, 330c, 340c, 350c, 360c, 370c). Machining tool according to one of the preceding claims, characterized in that the machining tool (110 to 148, 210 to 248, 330, 340, 350, 360, 370) is designed as a cutting tool (210 to 248), wherein a plurality of cutting elements (111) projecting perpendicularly in the direction of the workpiece (10) to be machined are connected to the carrier element (130c, 330c, 340c, 350c, 360c, 370c). Device for machining flat workpieces, comprising a machine frame with a workpiece support (102) and at least two machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) according to one of the preceding claims, wherein the machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are each connected in a rotationally fixed manner to a drive shaft (150, 160) that can be driven by means of a drive unit, at least in the drive rotation direction (P2, P3) of the drive shaft (150, 160), wherein the machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are each connected by the Drive shafts (150, 160) are rotatably mounted on the machine frame about a stationary axis of rotation (D) perpendicular to the workpiece support (102), and wherein the workpiece support comprises at least one transport unit (102, 104) which defines a transport plane (E3) in which the workpiece (10) is transported for processing, wherein the drive shafts (150, 160) of the processing tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are arranged below the transport plane (E3) when the workpiece (10) is being processed. device according to claim 7 , characterized in that the workpiece support comprises at least one transport unit (102, 104, 170) which defines a transport plane (E3) in which the workpieces (10) to be machined are transported for machining in a transport direction (P1). device according to claim 8 , characterized in that the at least two drive shafts (150, 160) with the machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are arranged in a single row transversely to the transport direction (P1) of the workpiece (10) to be machined, next to one another in a carrier unit (106, 206), wherein the carrier unit (106, 206) is preferably arranged parallel to the workpiece support (102). device according to claim 9 , characterized in that the drive shafts are first drive shafts (160), that the two machining tools (130 to 148, 230 to 248) are two first machining tools (130 to 148, 230 to 248), that the device (20, 30, 100, 200) has at least two second machining tools (110 to 128, 210 to 228) according to one of the Claims 1 until 6 comprises that the second processing tools (110 to 128, 210 to 228) are each connected in a rotationally fixed manner to a second drive shaft (150) which can be driven by means of a drive unit (162, 164), at least in the drive direction of rotation of the drive shaft (150), that the second processing tools (110 to 128, 210 to 228) are each rotatably mounted by one of the second drive shafts (150) on the machine frame about a fixed axis of rotation (D) perpendicular to the workpiece support (102), and that the at least two second drive shafts (150) are arranged next to one another in a second carrier unit in a second row transverse to the transport direction (P1) of the workpiece (10) to be processed, wherein the second carrier unit is preferably arranged parallel to the workpiece support (102). device according to claim 10 , characterized in that the first drive shafts with the first processing tools (130 to 148, 230 to 248) of the first row and the second drive shafts (150) with the second processing tools (110 to 128, 210 to 228) of the second row have the same fixed distance from each other and the first drive shafts (160) of the first row have a lateral offset transverse to the transport direction of half the distance between the drive shafts (150, 160) compared to the second drive shafts (150) of the second row. device according to claim 10 or 11 , characterized in that the first processing tools (130 to 148, 230 to 248) of the first row and the second processing tools (110 to 128, 210 to 228) of the second row are arranged and driven in such a way that the processing circles (K) of the first processing tools (110 to 128, 210 to 228) of the first row overlap with the processing circles (K) of the second processing tools (110 to 128, 210 to 228) of the second row or that a transport element (308), in particular a support roller (308), is arranged between the processing tools (110 to 128, 210 to 228) of the first row and the processing tools (130 to 148, 230 to 248) of the second row. Device according to one of the Claims 7 until 12 , characterized in that the drive shafts and the machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are arranged and designed next to one another in such a way that the spheres of action (K) of adjacent machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) overlap, wherein the drive unit or the drive units (162, 164) preferably drive all drive shafts (150, 160) with the machining tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) in the same direction of rotation (P1). Device according to one of the Claims 7 until 13 , characterized in that the processing tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are arranged and designed such that the grinding sheets (130d) or bristles or chipping elements of the processing tools (110 to 148, 210 to 248, 330, 340, 350, 360, 370) are deflected during the processing of the flat workpieces (10) and are pulled over the edge and the surface of the workpiece (10).

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