UNIT FOR PROCESSING AN EDGE SURFACE OF A WOOD-BASED BOARD AND PROCESS FOR PROCESSING

Description

[0001] The present application relates to an aggregate for processing an edge surface of a wood-based panel according to the preamble of claim 1. Such an aggregate is known from document DE 10 2017 207675 A1. Furthermore, the application relates to a device for processing an edge surface of a wood-based panel according to the preamble of claim 8. Finally, the present application relates to a method for processing a wood-based panel according to the preamble of claim 14.

[0002] Wood-based panels can be made from particleboard, MDF, and the like. They are used particularly in furniture construction, for example, in the kitchen furniture industry. These wood-based panels, which are typically thin relative to their length and width, are generally cut to a predetermined size using a device, creating edge surfaces along the cut edges. To cover these, edge profiles are applied to the edge surfaces and attached to the edge surface using glue. The edge profiles create a visually clean edge finish for the wood-based panel and also protect against moisture penetration into the respective wood-based panel.

[0003] The unit comprises a tool that can be driven in rotation about a tool axis. The tool has a working area that extends in a circular ring around the tool axis. In particular, the tool can be designed in the form of a circular disk that has a radius relative to the tool axis and a thickness measured parallel to the tool axis, which thickness is measured between an upper and a lower end face of the tool. In this case, it is particularly conceivable that the radius in which the working area extends around the tool axis exceeds the thickness of the tool, wherein the radius is preferably at least twice as large, preferably at least three times as large, more preferably at least four times as large, as the thickness.

[0004] The working area, which can be designed in particular in the form of a tangential surface of the tool relative to the tool axis, has a working relief that includes elevations and depressions oriented relative to the tool axis. The working relief can be roughened, in particular, in the manner of sandpaper, with the working relief in the working area having a large number of tiny elevations and depressions that form the roughness. State of the art

[0005] Applying edge profiles to the known surfaces of a particular wood-based panel is subject to high technical processing requirements. In particular, unevenness present in the edge surface after cutting the wood-based panel can remain visible after the respective edge profile has been applied, as the unevenness "pushes through" the (typically very thin) edge profile. Furthermore, unevenness can lead to poor adhesion of the edge profile to the respective edge surface, which can lead to at least local detachment of the edge profile over time.

[0006] To address these problems, German patent application DE 10 2014 225 849 A1, for example, proposes a device that processes the edge surface before applying a respective layer of glue. Various tools are used to remove chips protruding from the respective edge surface of the wood-based panel. Furthermore, after removing such chips, the edge surface is sanded and then smoothed. This latter step involves, in particular, pressing in any remaining chips and other unevenness, thereby achieving the most even surface possible.

[0007] The problem of protruding chips often arises in the core layer of a wood-based panel. Opposing outer layers, which form the visible surfaces of the wood-based panel, are generally dense, while the core layer is of lower quality, which is particularly evident in the fact that the core layer is made up of coarse chips. After cutting a wood-based panel, individual particles, especially the aforementioned chips, protrude beyond the edge surface, particularly in the core layer.

[0008] The known device has proven disadvantageous in that it does not reliably remove chips and other particles protruding from the edge surface. In particular, it has been shown that during the glue application process following the edge surface processing, particles continue to be removed from the edge surface. These particles are then returned to the so-called "glue pot," in which the glue is stored. This regularly leads to blockages in the respective glue application system and to inaccurate application of the glue, which in turn results in poor adhesion of the edge profile to the edge surface. Task

[0009] The present application is therefore based on the object of providing a device by means of which the preparation of a respective edge surface of a wood-based panel is improved prior to the application of glue for fixing an edge profile. Solution

[0010] The underlying problem is solved according to the invention by means of an aggregate having the features of claim 1. Advantageous embodiments emerge from the associated subclaims.

[0011] The unit according to the invention is characterized in that the working area is convexly shaped. This shape is present in relation to a cross-section of the tool that includes the tool axis. The convex, also referred to as "spherical," shape of the working area is thus expressed in the fact that a radius measured from the tool axis to an outer surface in a central region of the tool, viewed in relation to the thickness of the tool, is larger than a similarly measured radius at an upper or lower edge of the tool. Preferably, the working area is symmetrical over a height measured parallel to the tool axis, so that the working area has a high point at its height-viewed center relative to the tool axis and is shaped uniformly, tapering radially toward the tool axis towards the opposing end faces of the tool.The working area can have the shape of a parabola, particularly when viewed in cross-section. The shape of the working area is preferably symmetrical with respect to a center plane of the tool, which extends perpendicular to the tool axis and divides the tool into two equal halves. A radius measured from the tool axis to the working area of ​​the tool is larger in the center plane than in the front edge planes of the tool.

[0012] The unit according to the invention has many advantages. Thus, the convex design of the working area results in more particles being removed from the edge surface of the wood-based panel in a central region, viewed in the thickness direction of the wood-based panel, than at opposite edges of the edge surface, which are associated with a top side or bottom side of the wood-based panel. In other words, as a result of the engagement with the tool, the edge surface is given a concave shape corresponding to the convexly designed working area. This type of engagement results in the reliable removal of particles that protrude undesirably from the edge surface.The varying degree of tool engagement across the thickness of the wood-based panel is particularly advantageous given the aforementioned different quality levels of the wood-based panel (dense edge areas and coarse, poorer-quality middle layer), as the removal of protruding particles occurs more intensively where the problem of such particles is most pronounced. Tests have shown that during the subsequent application of glue to the edge surface, this results in significantly reduced removal and subsequent introduction of particles into a respective glue pot where the glue is stored.

[0013] As a further advantage, the edge surface is smoothed to such an extent that any significant unevenness that might otherwise arise as a result of protruding particles, particularly chips, is eliminated. This has the advantage that any edge profile glued onto the edge surface does not exhibit any visually disturbing elevations or the like. The quality of the finished wood-based panel is thus improved when using the aggregate according to the invention. Furthermore, the formation of local cavities beneath the glued-on edge profile is reduced, preferably completely prevented, thus minimizing the risk of the edge profile accidentally detaching from the edge surface.

[0014] It has also proven particularly advantageous that the unit is beneficial for processing the edge surfaces of an MDF board. The edge surfaces of such wood-based panels are typically extremely smooth, i.e., they have very little roughness. This is disadvantageous for the application of glue and the application of an edge profile, since the surface of the edge surface is comparatively small due to the very smooth structure. To achieve better adhesion by means of the glue, it is advantageous if the edge surface is slightly roughened. This same roughening is achieved by means of the unit or the tool. Accordingly, processing such a wood-based panel using the unit according to the invention leads to better adhesion of the edge profile applied later.

[0015] Preferably, the tool is provided with a diamond coating in the working area. This has the advantage that the tool's service life is particularly long due to the high hardness of such a coating. Furthermore, the diamond coating can be repeatedly renewed, allowing the tool as such to be used over a long period of time without having to be replaced as a whole. Finally, a diamond coating makes it particularly easy to create a rough working relief, by means of which the desired removal of protruding particles can be achieved particularly efficiently. A tool body of the tool can be made of aluminum or steel, for example.

[0016] In a particularly advantageous embodiment of the unit according to the invention, the unit comprises at least two sensing rollers, each rotatable about a rotational axis. The rotational axes of the sensing rollers are preferably oriented parallel to each other and parallel to the tool axis. The sensing rollers are designed to guide the tool relative to the edge surface in terms of distance. For this purpose, the sensing rollers are coupled to the tool in such a way that they can influence the distance between the tool and the edge surface of the wood-based panel. This can be achieved, for example, by means of coupling arms. This allows the tool to be guided particularly precisely relative to the edge surface.In particular, unintentional engagement of the tool with the edge surface is prevented in such a way that the tool penetrates too deeply into the material of the wood-based panel in the area of ​​the edge surface and inadvertently removes material or does not engage the wood-based panel at all. Instead, the tool is guided relative to the edge surface by means of the sensing rollers in such a way that only the removal of undesired protruding particles is carried out as described above. This does not involve the systematic removal of a layer of material from the edge surface, but rather the cleaning of the edge surface of protruding particles.

[0017] For the described embodiment, it may also be advantageous if the tool is arranged between the sensing rollers. This arrangement results in the edge surface, at a particular point during processing by the unit, first coming into contact with the contact surface of the first sensing roller, then with the working area of ​​the tool, and finally with the contact surface of the second sensing roller. This type of arrangement is particularly advantageous for the distance-based guidance of the tool relative to the edge surface, since the tool is guided relative to the wood-based panel by means of a sensing roller at both an inlet and an outlet.

[0018] If the unit is equipped with the described sensing rollers, it can also be advantageous if these are arranged relative to the tool in such a way that, during the intended movement of a wood-based panel relative to the unit, the edge surface of the wood-based panel comes into contact with both the contact surfaces of the sensing rollers and the working area of ​​the tool. This can achieve the advantage that the sensing rollers as such engage with the edge surface and can thereby press particles that protrude beyond the edge surface towards the wood-based panel. In other words, the sensing rollers have a smoothing effect on the edge surface of the wood-based panel. The undesirable lifting of particles during the glue application, which takes place after the wood-based panel has been processed using the unit, is thereby further reduced.

[0019] In a preferred embodiment, the working area has a diamond coating formed in the working relief. Such a working area is particularly well suited for engaging the edge surface of the wood-based panel and thereby removing protruding particles in the desired manner. The diamond coating preferably has a CAMI grain size of at least 100, preferably at least 150, more preferably at least 200.

[0020] The tool of the unit according to the invention comprises at least one discharge channel formed in the working area. The discharge channel is set back radially in the direction of the tool axis relative to a radially outer surface of the tool in the working area and thus forms, to a certain extent, a local depression in the working area. The discharge channel is suitable for removing particles, in particular chips, removed from the edge surface of the wood-based panel from the working area. For this purpose, it is advantageous if the discharge channel extends in the thickness direction of the tool in such a way that it opens into the surroundings of the tool on at least one end face of the tool, preferably on both opposite end faces of the tool.The extension of the discharge channel in the thickness direction can be understood as a vectorially proportional extension, with a longitudinal axis of the discharge channel, for example, having a component oriented parallel to the tool axis as well as a component oriented in the circumferential direction of the tool. In other words, it is conceivable for the discharge channel to be oriented obliquely relative to the tool axis, preferably at an angle of 45° relative to the tool axis. It is also conceivable for the discharge channel to be straight or curved, in particular with multiple curvatures.

[0021] For the removal of removed particles, it is particularly advantageous if the removal channel opens into a free space or surrounding area at at least one point away from the working area, so that removed particles can be removed from the edge surface that engages with the working area towards the free space or surrounding area. In a particularly advantageous embodiment of the unit, the working area is completely traversed along its circumference by a zigzag-shaped system of removal channels, each of which is preferably inclined at a projected angle of 45° to the tool axis. The particles removed by the working relief can then be guided directly into the nearest removal channel and removed via this removal channel to one of the end faces of the tool.In this embodiment, the discharge channels preferably extend between the end faces of the tool, reaching the end faces in such a way that they are open to the surroundings of the tool at each end face. This allows the lifted particles to exit the discharge channels directly at the end faces. A corresponding embodiment is illustrated below in the context of the exemplary embodiment.

[0022] In a further advantageous embodiment of the unit according to the invention, the tool has a flushing channel which extends in a radial direction relative to the tool axis through a tool body of the tool. The flushing channel extends from a circumferential surface of the tool to a central shaft receptacle of the tool, which is formed centrally on the tool and in which a drive shaft can be mounted. In particular, the shaft receptacle is formed concentrically around the tool axis and forms a recess into which a drive shaft can be inserted. The flushing channel is suitable, in particular, for directing a flushing air flow to the circumferential surface of the tool. This can form both a radially outer closure of the working area and a base of a discharge channel which is set back radially relative to the working area in the direction of the tool axis.

[0023] If at least one discharge channel is provided in the working area, it is particularly advantageous if the flushing channel opens into the discharge channel. The tool preferably comprises a plurality of flushing channels, which are advantageously distributed equidistantly around the tool axis. The flushing channel is advantageously designed to be straight, so that it presents the lowest possible flow resistance for a flushing air flow.

[0024] The flushing channel is preferably designed to be open towards the shaft receptacle. This makes it particularly easy to supply the flushing channel with a flushing air stream, wherein in particular a drive shaft which is received in the shaft receptacle can be designed in the form of a hollow shaft. In this way, it is possible to direct the flushing air stream from a pressure source, in particular from a compressor, through a flow channel formed in the drive shaft designed as a hollow shaft to the flushing channel and finally through the flushing channel to the peripheral surface of the tool. There, under the effect of such a flushing air stream, it is particularly easy to remove particles lifted off the edge surface.In particular, the particles accumulating in a discharge channel can be mobilized by means of the purge air flow in the discharge channel and transported along the discharge channel to an end at which the particles exit, for example, into an environment of the tool.

[0025] The underlying object is further achieved according to the invention by means of a device having the features of claim 8. Advantageous embodiments emerge from the associated subclaims.

[0026] According to the invention, the device comprises an aggregate as described above, by means of which an edge surface of a wood-based panel can be processed prior to the application of glue. Furthermore, the device comprises a drive unit by means of which the aggregate can be operated. For this purpose, the drive unit has at least one electric drive, in particular in the form of an electric motor, by means of which a drive shaft of the drive unit can be driven in rotation. This drive shaft is connected in a torque-transmitting manner to the tool of the aggregate, which tool has a corresponding shaft mount. This shaft mount is designed, in particular, concentrically to the tool axis of the tool, wherein the tool is preferably designed in the form of a circular disk.

[0027] The unit according to the invention is particularly easy to operate using the device according to the invention. The resulting advantages have already been explained above. In particular, the convex design of the tool's working area makes it particularly easy to prepare the edge surface of the wood-based panel for glue application. This ensures that any particles protruding beyond the edge surface are reliably removed, thus preventing these particles from accidentally entering the glue pot.

[0028] Particularly preferably, the device comprises a clamping device by means of which the unit can be pre-tensioned in the direction of a respective edge surface. The clamping device is thus suitable for pressing the unit against the edge surface, thereby ensuring continuous engagement of the tool with the edge surface. If the unit preferably has two sensing rollers as described above, the clamping device is further suitable for keeping contact surfaces of the sensing rollers equally in contact with the edge surface of the wood-based panel. In this case, the sensing rollers, as explained above, primarily serve to hold the tool at a defined distance from the edge surface and to guide it relative to the edge surface.In this way, unintentional engagement of the tool with the edge surface is prevented, where, for example, the tool penetrates so deeply into the wood-based panel that material removal occurs comparable to milling.

[0029] In a particularly preferred embodiment, the clamping device is equipped with a double-acting piston-cylinder unit having two working chambers. These working chambers can be alternatively pressurized with a working fluid, in particular air, whereby the piston of the piston-cylinder unit can be alternatively extended out of the cylinder or retracted into the cylinder. This embodiment makes it possible to activate or deactivate the unit as required. In the case of activation, the working chamber is pressurized with the working fluid, which pre-tensions the unit against the edge surface. In the case of deactivation, the other working chamber is pressurized with the working fluid, so that the unit, i.e. in particular the tool, is brought out of engagement with the edge surface.In a preferred embodiment, the clamping device further comprises a compressor, by means of which the working chambers can be alternately pressurized with pneumatic pressure. In this embodiment, the working fluid is a gas, in particular air.

[0030] Furthermore, a configuration of the device in which the drive shaft is designed in the form of a hollow shaft can be particularly advantageous. This provides a flow channel for a cleaning medium, in particular a purge air stream. In this case, it is preferred that the drive shaft interacts directly or indirectly with a pressure source at an end facing away from the shaft holder of the tool, by means of which the cleaning medium can be guided into the flow channel. This pressure source can in particular be formed by a compressor, by means of which a purge air stream can be generated and guided into the flow channel. In this way, the cleaning medium can be guided to the tool through the flow channel formed in the drive shaft.

[0031] This configuration is particularly advantageous if the tool has at least one flushing channel as described above. This channel allows the cleaning medium to be guided from the shaft mount to the peripheral surface of the tool. This allows for continuous removal of particles lifted from the edge surface, ensuring reliable operation of the tool. The at least one flushing channel is designed such that it is fluidically connected to the flow channel of the drive shaft, so that the cleaning medium can flow directly from the flow channel of the drive shaft into the flushing channel.

[0032] In order to ensure that the lifted particles can be removed particularly efficiently, it is further advantageous if the rinsing channel opens into a removal channel on the circumference of the tool, the removal channel being formed in a working area of ​​the tool as described above.

[0033] Finally, the underlying problem is further solved according to the invention by means of a method having the features of claim 14. An advantageous embodiment results from the corresponding subclaim.

[0034] The method provides for the edge surface of a wood-based panel to be machined using a tool of an assembly according to the invention before gluing an edge profile. The resulting advantages have already been explained above.

[0035] For the operation of the tool, it can be particularly advantageous if a speed and a direction of rotation at which it is operated are selected depending on a feed rate of the wood-based panel and / or depending on a type of wood-based panel. In particular, the device can have a control unit that is designed to control the drive unit depending on the feed rate and / or the type of wood-based panel, so that operating parameters of the tool are changed. The control can in particular relate to the speed and / or the direction of rotation of the tool. Preferably, the control unit interacts with at least one sensor device by means of which information on the feed rate and / or the type of wood-based panel can be detected and transmitted to the control unit.In this way, the device is suitable for changing the operating parameters of the tool automatically, i.e. in particular without manual intervention by a machine operator. Examples of implementation

[0036] The invention is explained in more detail below using an exemplary embodiment illustrated in the figures. It shows: Fig. 1: A perspective view of a device according to the invention, which comprises an aggregate according to the invention, Fig. 2: A schematic representation of the device according to Figure 1 , Fig. 3: A detail of a tool of the unit according to the invention in cooperation with a drive shaft of the device, Fig. 4: A schematic plan view of the tool of the unit in cooperation with two feeler rollers, Fig. 5: A schematic cross section through the tool of the unit, Fig. 6: A perspective view of the tool according to Figure 5, Fig. 7: Another perspective view of the tool according to Figure 5 .

[0037] An example of implementation that is shown in the Figures 1 to 7 shown, comprises an aggregate according to the invention 1, which is used to machine an edge surface 2 a wood-based panel 3 Such processing takes place prior to the application of glue, which is used to glue an edge profile (not shown in the figures) onto the edge surface 2 is applied.

[0038] The unit 1 includes a tool 5, which is designed here in the form of a circular disk. The tool 5 is around a tool axis 4 mounted in a rotatable manner, whereby the tool 5 one concentric to the tool axis 4 trained wave absorption 17 This is suitable for use with a drive shaft 18 a drive unit 20to work together so that the tool 5 The tool 5 further comprises a circular ring around the tool axis 4 surrounding work area 10, one radial relative to the tool axis 4 external end of the tool 5 When the unit is in operation 1 It is intended that the tool 5 with his work area 10 in machining contact with the edge surface 2 The work area 10 a working relief by means of which the tool 5 when used as intended with the edge surface 2 In the example shown, the working relief is formed by a diamond coating that is embedded in the working area 10 The diamond coating shown has a CAMI grit of 250.

[0039] Furthermore, the tool 5 In the example shown, a large number of discharge channels 13 which are arranged radially outward and in the form of a recess, i.e. a radial recess relative to the working area 10, are designed. The drainage channels 13 In the example shown, they are straight and run at an angle of 45° to the tool axis 4. The drainage channels extend 13 over an entire thickness 11 of the tool 5, ie from a lower front side 14 up to an upper front side 14 of the tool 5, where the drainage channels 13 proportionally in the circumferential direction and proportionally in the thickness direction of the tool 5 The drainage channels 13 are particularly evident in the Figures 6 and 7 .They are designed to be used from the edge surface 2 removed particles to the front sides 14 of the tool 5 For this purpose, the elements are designed in such a way that they are directed towards the front 14 are open towards the outside, so that particles that are removed via the discharge channels 13 are discharged at the front ends of the respective discharge channel 13 unhindered into an environment of the tool 5 and thus from the respective discharge channel 13 This makes it particularly easy to remove the particles after they have lifted off. The removal channels 13 In the example shown, they form a zigzag-shaped profile in the working area 10 out of.

[0040] According to the invention, the working area 10 of the tool 5 convex. This is particularly evident in the illustration according to Figure 5 The convex design results in a frontal, in an edge plane of the tool 5 measured radius 33 of the tool 5 is smaller than a central radius measured in a median plane 34 of the tool 5. In the example shown, the workspace is 10 relative to the center plane perpendicular to the tool axis 4 extends and the tool 5 divided in the middle, symmetrically designed so that the radius measured in the center plane 34 a maximum radius of the tool 5 represents, while the frontal radii measured in the edge planes 33 minimum radii of the tool 5 This convex, sometimes also called "spherical" shape of the working area 10 has the advantage that the tool 5 about the thickness of the wood-based panel 3across different degrees with the edge area 2 and leads to the desired lifting of protruding particles, especially in a middle layer of the wood-based panel 3, which is typically most affected by unwanted protruding particles due to its lower density. The extent to which the working area 10 convexly shaped, is in Figure 5 In particular, the maximum radius 34 between 2% and 10%, preferably between 3% and 8%, more preferably between 4% and 6%, larger than the minimum radius 33 of the tool 5. This feature can be advantageous independently of the other features of the embodiment.

[0041] In the example shown, the aggregate includes 1 Touch rollers 8, 9, which are particularly well suited to Figure 4 but for the sake of simplicity in Figure 1are not shown. The touch rollers 8, 9 are connected by means of coupling arms 30, 31 so with the tool 5 coupled so that the sensing rollers 8.9 in Force-transmitting manner with the tool 5 are connected. The sensing rollers 8, 9 so relative to the tool 5 arranged that the wood-based panel 3 during a movement in a feed direction 29 relative to the aggregate 1 first with a contact surface 12 the sensing rollers 9, then with the work area 10 of the tool 5 and finally with a contact surface 12 the sensing roller 8 comes into contact. In other words, the tool 5 between the sensing rollers 8, 9 arranged. The sensing rollers 8, 9 are designed to use the tool 5 distance relative to the wood-based panel 3so that mechanical intervention of the work area 10 with the edge surface 2 only minimally, namely exclusively in the desired, particle-lifting manner. A grinding, over the entire thickness of the wood-based panel 3 planned removal of material in the edge area 2 is not intended. The touch rollers 8, 9 In addition to the guiding function for the tool 5 furthermore a mechanical effect on the edge surface 2, by the feeler rollers 8, 9 over the edge surface 2 press protruding particles, especially chips, and especially into the material of the wood-based panel 3 which creates a smoothing effect on the edge surface 2 is exercised.

[0042] During operation of the device 19 the wood-based panel 3 in the feed direction29 relative to the aggregate 1 moved, whereby the feeler rollers 8, 9 around their respective axes of rotation 6, 7 are freely rotatable and due to frictional contact on the contact surfaces 12 with the edge surface 2 roll on the latter. Meanwhile, the tool 5 is driven by the drive shaft 18 active in one direction of rotation 32 rotationally driven, which in the example shown is against the feed direction 29 oriented.

[0043] For the operation of the unit 1 includes the device 19 the above-mentioned drive unit 20, which in the example shown has an electric drive 21 in the form of an electric motor. As can be seen in particular from Figure 2 The drive is 21 by means of an output shaft with an output pulley 36 which in turn are connected by a drive belt 35with a drive pulley 37 In this way, a drive unit can be used to 21 torque provided by the output pulley 36, the drive belt 35 and the drive pulley 37 formed belt drive to the drive shaft 18 which are connected to the drive pulley 37 Due to the torque-transmitting coupling of the drive shaft 18 with the tool 5 The latter is effective by means of the drive 21 rotary drive.

[0044] The device 19 further comprises a clamping device 22, which in the example shown is a piston-cylinder unit 23 The clamping device 22 includes a piston 41, which is directly connected to a housing 42 the device 19 The housing 42 is on plain bearings38 mounted so that it is parallel to the stroke direction of the piston 41 is movable. The piston-cylinder unit 23 In the example shown, it is double-acting and comprises two working spaces 24, 25. These can be alternately pressurized with a working fluid, which in this case is air. For this purpose, the two working chambers 24, 25 with a compressor 26 connected, whereby in the example shown a line from the compressor 26 to the work spaces 24, 25 using shut-off valves 39 is controllable. By means of the clamping device 22 is the aggregate 1 pre-tensioned against the edge surface 2, whereby the working space 25 is subjected to pneumatic pressure. This causes the piston 41 from the piston-cylinder-one 23 extended and the housing 42 together with the unit mounted on it 1towards the wood-based panel 3 to move. If the unit 1 out of engagement with the wood-based panel 3 Alternatively, the work area 24 with pneumatic pressure so that the piston 41 is drawn into the cylinder. The tool then loses 5 its engagement with the edge surface 2 the wood-based panel 3.

[0045] In a particularly preferred manner, the tool 5 in the example shown with a total of four flushing channels 16 which are particularly well suited to the presentation according to Figure 3 The flushing channels 16 extend radially relative to the tool axis 4 within a tool body 15. In particular, the flushing channels 16 into the tool body 15 The flushing channels open 16on the one hand radially inside into the shaft holder 17 and radially outwardly in discharge channels 13. The drive shaft 18 In the example shown, it is designed as a hollow shaft, so that the drive shaft 18 a flow channel 27 The drive shaft 18 further comprises radial openings by means of which in the area of ​​the shaft 17 a fluidic connection to the flushing channels 16 In this way it is possible to create a purge air flow 40, the flow channel 27 the drive shaft 18 starting from a compressor 28 is fed into the flushing channels 16 through which the purge air flow 40 to the drainage channels 13 There it can escape and particles that are in the discharge channels 13This ensures the reliable removal of particles that are present on the edge surface 2 the wood-based panel 3 is removed.

[0046] In a proper operation of the device according to the invention 19 A variety of wood-based panels are produced one after the other 3 the unit 1 supplied, whereby the unit 1 is typically fixed and the wood-based panels 3 in the feed direction 29 relative to the aggregate 1 moved and in this way on the unit 1 The unit 1 occurs with both the sensing rollers 8, 9 as well as with the tool 5 in intended engagement with the respective edge surface 2 the wood-based panel 3, whereby protruding particles on the edge surface 2In this way, unwanted lifting of such particles during the application of glue to the edge surface is avoided. 2 associated with the introduction of these particles into a glue pot of the glue is avoided. After processing the edge surface 2 by means of the unit 1 The edge surface is glued using a device not shown in the figures and generally known in the state of the art for applying glue 2 coated with glue, whereupon a respective edge profile, with which the edge surface 2 is to be covered, is applied and pressed down. This is attached to the unit 1 The subsequent work steps are known in the state of the art. For the processing of the edge surface 2 the tool 5 in the example shown with 1 a speed of 500 revolutions per minute around the tool axis 4 in the direction of rotation 32The direction of rotation 32 of the tool 5 is therefore in the example shown opposite to the feed direction 29 the wood-based panel 3. List of reference symbols

[0047] 1 Unit 2 Edge surface 3 Wood-based panel 4 Tool axis 5 Tool 6 Rotation axis 7 Rotation axis 8 Tracer roller 9 Tracer roller 10 Working area 11 Thickness 12 Contact surface 13 Discharge channel 14 Front side 15 Tool body 16 Flushing channel 17 Shaft mount 18 Drive shaft 19 Fixture 20 Drive unit 21 Drive 22 Clamping device 23 Piston-cylinder unit 24 Working space 25 Working space 26 Compressor 27 Flow channel 28 Compressor 29 Feed direction 30 Coupling arm 31 Coupling arm 32 Direction of rotation 33 Radius 34 Radius 35 Drive belt 36 Drive pulley 37 Drive pulley 38 Slide bearing 39 Shut-off valve 40 Flushing air flow 41 Piston 42 housings

Claims

1. An assembly (1) for machining an edge surface (2) of a wood-based panel (3) prior to a glue application, comprising - a tool (5) which can be driven in rotation about a tool axis (4), wherein the tool (5) comprises a working area (10) rotating in a circular ring about the tool axis (4), wherein the working area (10) comprises a working relief, by means of which the tool (5) can engage with the edge surface (2) when used as intended, characterised in that the working area (10) - viewed in a cross-section of the tool (5) containing the tool axis (4) of the tool (5) - is formed convex, wherein at least one discharge channel (13) set back radially relative to the tool axis (4) is formed in the working area (10), by means of which discharge channel particles removed from the edge surface (2) can be carried away.

2. The assembly (1) according to claim 1, characterised by two sensing rollers (8, 9) each rotatable about an axis of rotation (6, 7), wherein the sensing rollers (8, 9) are designed to guide the tool (5) relative to the edge surface (2) in terms of distance, wherein the axes of rotation (6, 7) of the sensing rollers (8, 9) are orientated parallel to one another and parallel to the tool axis (4) of the tool (5).

3. The assembly (1) according to claim 2, characterised in that the sensing rollers (8, 9) are arranged relative to the tool (5) in such a way that, when there is a movement of the wood-based panel (3) relative to the assembly (1) in the intended manner, the edge surface (2) comes into contact both with the contact surfaces (12) of the sensing rollers (8, 9) as well as with the working area (10) of the tool (5).

4. The assembly (1) according to claim 2 or 3, characterised in that the tool (5) is arranged between the two sensing rollers (8, 9), so that in the course of the machining of the edge surface (2) a given point of the edge surface (2) first comes into contact with the contact area (12) of the first sensing roller (8), then with the working area (10) of the tool (5) and finally with the contact area (12) of the second sensing roller (9).

5. The assembly (1) according to any one of the preceding claims, characterised in that the discharge channel (13) extends at least in part in a thickness direction of the tool (5) up to at least one end face (14) of the tool (5).

6. The assembly (1) according to any one of the preceding claims, characterised in that the tool (5) comprises at least one flushing channel (16) extending through a tool body (15) of the tool (5) in a radial direction relative to the tool axis (4), which flushing channel extends from a circumferential surface of the tool (5) up to a central shaft socket (17) of the tool (5), by means of which the tool (5) can be mounted on a drive shaft (18).

7. The assembly (1) according to claim 5 and 6, characterised in that the flushing channel (16) emerges at the peripheral side in a discharge channel (13).

8. A device (19) for machining an edge surface (2) of a wood-based panel (3) prior to a glue application, comprising - an assembly (1) for machining an edge surface (2) of a wood-based panel (3) prior to a glue application and - a drive unit (20) for operating the assembly (1), wherein the drive unit (20) comprises at least one electric drive (21), by means of which a drive shaft (18) can be driven in rotation, wherein a tool (5) of the assembly (1) comprises a central shaft socket (17), by means of which the tool (5) is mounted on the drive shaft (18) in a torque-transmitting manner, characterised in that the assembly (1) is constituted according to any one of the preceding claims.

9. The device (19) according to claim 8, characterised by a clamping device (22), by means of which the assembly (1) can be preloaded in the direction of a given edge surface (2), so that the tool (5), preferably also the sensing rollers (8, 9) of the assembly (1), can be kept in machining contact with the edge surface (2) as the wood-based panel (3) is moved relative to the assembly (1).

10. The device (9) according to claim 9, characterised in that the clamping device (22) comprises a double-acting piston-cylinder unit (23), which comprises two working chambers (24, 25), wherein the clamping device (22) preferably comprises a compressor (26), by means of which the working chambers (24, 25) can be subjected alternately to pneumatic pressure.

11. A device (19) according to any one of the preceding claims, characterised in that the drive shaft (18) is designed as a hollow shaft, which provides a flow channel (27) for a cleaning medium, wherein the drive shaft (18) preferably interacts indirectly or directly at an end facing away from the shaft socket (17) of the tool (5) with a compressor (28), by means of which the flow channel (27) can be acted upon with a flushing air flow (40).

12. The device (19) according to claim 11, characterised in that the tool (5) comprises at least one flushing channel (16) extending in a radial direction relative to the tool axis (4) through a tool body (15) of the tool (5), which flushing channel extends from a circumferential surface of the tool (5) up to the tool socket (17), wherein the flushing channel (16) is connected fluidically to the flow channel (27) of the drive shaft (18), so that a flushing air flow (40) can pass from the flow channel (27) into the flushing channel (16).

13. The device (19) according to claim 12, characterised in that the flushing channel (16) ends at the circumference in a discharge channel (13), which is formed in a working area (10) of the tool (5) and by means of which particles removed from the edge surface (2) can be carried away.

14. A method for machining a wood-based panel (3) by means of an assembly (1), the assembly (1) comprising - a tool (5) which can be driven in rotation about a tool axis (4), wherein the tool (5) comprises a working area (10) rotating in a circular ring about the tool axis (4), wherein the working area (10) comprises a working relief, by means of which the tool (5) can engage with the edge surface (2) when used as intended, wherein the working area (10) - viewed in a cross-section of the tool (5) containing the tool axis (4) of the tool (5) - is formed convex, wherein at least one discharge channel (13) set back radially relative to the tool axis (4) is formed in the working area (10), by means of which particles removed from the edge surface (2) can be carried away, wherein the wood-based panel (3) is cut and an edge profile is glued to an edge surface (2) of the wood-based panel (3) thus formed, characterised in that the edge surface (2) is machined by means of the tool (5) before the edge profile is glued on.

15. The method according to claim 14, characterised in that a speed and direction of rotation of the tool (5) is selected depending on a feed speed of the wood-based panel (3) and / or depending on a type of the wood-based panel (3).