Edge milling device and method for edge milling

Abstract

An edge milling device with an edge milling tool (1) with a milling tool (20) and a dust extraction hood (3) with an engagement slot (6) for workpiece edges (12; 13; 22; 23) of a plate (8; 9; 10) is provided, as well as a method for plates which operate very economically with optimized dust and chip removal, which is achieved by arranging two edge milling tools (1; 2) on transverse guides at the gaps (7) of two plates (8; 9; 10) and by allowing a workpiece front edge (12) of a rear plate (9) and a workpiece rear edge (22) of a front plate (8) to be machined in opposite directions, and by arranging the dust extraction hoods (3) to be rotatable, and by allowing the edge milling tools (1; 2) to be locked during plate transport and the engagement slots (6) of the dust extraction hoods (3) to be rotatable so that all workpiece edges (12; 13; 22; 23) can be machined by two edge milling tools (1; 2) and milling dust can be permanently and completely extracted.

Description

[0001] The invention relates to an edge milling device and a method for edge milling that can be carried out therewith.

[0002] An edge processing machine is known, DE 196 11 357 C2, on whose machine frame a continuous conveyor for panels to be processed in a continuous flow and edge milling tools for edge processing are mounted. The tools have access slots in their extraction hoods for the tool edges to be processed. Further prior art is disclosed in EP 3 954 499 B and EP 3 505 318 A. EP 3 954 499 B discloses an edge milling device with an extraction hood.

[0003] A disadvantage of this previously known edge processing machine is that with its stationary extraction hoods of its edge milling tools only one workpiece edge of a panel can be processed at a time, so that for a rectangular panel four such edge processing machines are required, namely one for a workpiece front edge of a panel, one for a workpiece rear edge of a panel and one each for the right and left side of a panel in the transport direction, so that overall costs arise for four edge milling tools as well as for their operation and maintenance, just as a double installation length is required.

[0004] The object of the invention is to provide an edge milling device and a method for panels that can be carried out therewith, which operate significantly more economically with optimized dust and chip removal.

[0005] The solution to this problem arises in conjunction with the features of the preambles of claims 1 and 7 according to the invention in conjunction with their characterizing features. The inventive edge milling device is characterized in that a first edge milling tool together with a second edge milling tool are arranged below or above a gap between two panels that are conveyed at a distance from one another and are briefly at rest on mutually parallel transverse guides, and in each case a workpiece front edge of a rear panel in the transport direction of successively arranged panels can be machined from a first side to the opposite second side and a workpiece rear edge of a front panel can be machined from the second side to the first side simultaneously or with a time delay, and in that the suction hoods of both edge milling tools are arranged rotatably around the milling tools,When the panels are transported further, the edge milling tools, for example in the case of rectangular panels, can be secured laterally with extraction hoods rotated 90° to the right or left, and the extraction hoods with their engagement slots are rotated from the front and rear edges of the workpiece towards the lateral edges of the workpiece, so that all edges of a panel can be machined with only two milling tools and milling dust can be completely extracted at all times.

[0006] The first edge milling tool therefore always machines the leading edge of a panel following a front panel as well as its right or left workpiece edge, while the other, opposite, second edge milling tool always machines the trailing edge of a front panel as well as the other, opposite, left or right workpiece edge of a panel. This allows the use of only two milling units while ensuring optimal dust and chip removal. The panels to be machined are essentially rectangular with straight edges. The panels can advantageously also have different angles, just as the edges can have a wavy contour, for which purpose the edge milling tools can be equipped with additional degrees of freedom in the longitudinal and / or transverse direction.

[0007] Advantageous embodiments of the subject matter of the invention result from and in combination with the following subclaims.

[0008] Preferably, the extraction hood is mounted so that it can rotate around the axis of rotation of the milling tool, so that the engagement slot of the extraction hood always maintains an optimal position in relation to the milling tool and the respective workpiece edge.

[0009] According to a particularly preferred embodiment of the invention, a servo motor is arranged directly or indirectly on the extraction hoods to generate the rotary movement, by means of which servo motor the extraction hoods can be adjusted, for example via a belt drive and via pulleys arranged on the extraction hoods, by 90° to the left or 90° to the right or in a 0° position parallel to the respective workpiece edge being machined, whereby rotations of 360° are possible.

[0010] Advantageously, there are also arranged on both sides of the engagement slot in the extraction hood, contact rollers which, during operation, rest against the respective workpiece edges of the panels, wherein the contact rollers are preferably moved to the workpiece edges via a servo motor, which enables the precise determination of the panel position.

[0011] According to a particularly preferred embodiment of the invention, the extraction hood consists of a lower component and an upper component, both of which are designed to rotate synchronously with one another, wherein the upper component partially overlaps the lower component in an overlap area that is larger than the thickest panel to be processed, and the engagement slot is incorporated in the upper component and is open at the bottom, and the upper component is designed to be height-adjustable relative to the lower component, so that the engagement slot can be adapted to the thickness of a panel, as well as to the dimensions of an edge milling tool. This adjustment can advantageously be carried out automatically for each individual panel without interruption and with the aid of sensors.

[0012] Furthermore, on the upper component of the extraction hood, a receptacle for a guide pin of the lower component is advantageously arranged on both sides of the engagement slot, which extends from there upwards into the receptacle and which ensures the synchronous rotation of the upper part of the extraction hood and the lower part of the extraction hood, as well as the height adjustment of the upper component relative to the lower component of the extraction hood, thereby ensuring optimal guidance.

[0013] The inventive method for edge milling film overhangs from plates coated with films and moved discontinuously at a distance from one another on a continuous conveyor of this inventive edge milling device begins with the edge milling tools arranged below or above a gap between two plates conveyed adjacent to one another and at rest being guided along two workpiece front and rear edges of these plates which are parallel and transverse to the transport direction, of which a first edge milling tool is placed in the transport direction of the plates on a first side in front of a front edge of a rear plate following a front plate and a second edge milling tool is placed on the second side, the side opposite the first side, behind a rear edge of a front plate.The two edge milling tools then machine these two workpiece edges in a single pass, changing sides in the process, whereupon the first edge milling tool, now on the right, then machines the right side of the subsequent panel and the second edge milling tool, the left side of this subsequent panel, while the panels are transported further by the through-feed conveyor to the position above the gap, with the rear panel now becoming the new front panel and then the second edge milling tool, now on the left, is moved behind the rear edge of the front panel to the right and the first edge milling tool is moved in front of the front edge of a new third panel to the left, so that the previously rear panel is then edge milled on all sides, whereupon the process is repeated in reverse for the next panels.

[0014] In an essential intermediate step of the process, the extraction hoods open to the workpiece edges are rotated to suit the workpiece edge to be machined, which is advantageously done via a servo motor or a connected belt drive.

[0015] Furthermore, a work step preceding the inventive method is also advantageous, which consists in adapting the width of the engagement slot of the extraction hood to the thickness of the milling head and / or a plate to be machined, which makes it possible to optimally ensure dust removal and chip collection.

[0016] An embodiment of the invention is described in more detail below with reference to the drawings. They show: Fig. 1 a spatial view of an edge milling tool, Fig. 2 a sectional view of the edge milling tool of the Fig. 1, Fig. 3 the first working step of an edge milling process on a rectangular plate in a starting position, Fig. 4 an intermediate step of the process after machining of the workpiece front and rear edges, and Fig. 5 the renewed starting position of the process with reversed positions of the edge milling tools.

[0017] The Figures 1 and 2show an edge milling tool 1; 2 of an edge milling device in an isometric and a sectional view with the actual milling tool 20, around which extends an extraction hood 3 which is rotatably mounted about the axis of rotation of the milling tool 20 and which is composed of an upper component 4 and a lower component 5, wherein the components 4; 5 overlap each other in an overlap region 15 and a radial engagement slot 6 for a workpiece edge (12; 13; 22; 23) is introduced in the upper component 4, which engagement slot is open at the bottom, so that raising the upper component 4 leads to a widening of the engagement slot 6 for a workpiece edge 12; 13; 22; 23. The engagement slot 6 can thus be adapted to the height of a milling tool 20 and / or the thickness of a plate 8; 9; 10.

[0018] On the cover side, a pulley 17 is arranged on the upper component 4 of the extraction hood 3, via which the upper component 4 of the extraction hood 3 can be rotated, which, via its contour or further coupling elements, also rotates the lower component 5 of the extraction hood 3, which in turn has an extraction connection 16 for the removal of dust and chips.

[0019] On both sides of the engagement slot 6, contact rollers 14 are arranged on the components 4; 5 of the extraction hood 3, which, during operation, rest against the respective workpiece edges 12; 13; 22; 23 of the plates 8; 9; 10. Furthermore, the upper and lower components 4; 5 of the extraction hood 3 carry receptacles 18 on both sides for guide axes 19, via which the height adjustment of the upper component 4 relative to the lower component 5 of the extraction hood 3 is realized.

[0020] The Figures 3 to 5These briefly explain the process for edge milling film overhangs from film-coated plates 8; 9; 10 of an edge milling device that are spaced apart from one another and moved discontinuously on a continuous conveyor. This device has two edge milling tools 1; 2 below or above a gap 7 between two adjacently conveyed and at rest plates 8; 9; 10, which are guided parallel to one another and are movable transversely to the transport direction 11 of the workpiece front and rear edges 12; 22 of two plates 8; 9; 10 and process them.

[0021] A first edge milling tool 1 is initially, as shown in Fig. 3is shown, placed in the transport direction 11 on a first side, in a plan view, in front of a front edge 12 of a rear plate 9 and a second edge milling tool 2 on the right side opposite the first left side behind a rear edge 22 of a front plate 8, wherein the edge milling tools 1; 2 with their engagement slots 6 face the workpiece front and rear edges 12; 22, whereupon the two edge milling tools 1; 2 move along these two workpiece edges 12; 22, changing sides, and in doing so machine them, whereupon the now right-hand first edge milling tool 1 subsequently machines the right workpiece edge 23 of the following plate 9 and the second edge milling tool 2 machines the left workpiece edge 13 of this plate 9, for which purpose the extraction hoods 3 with their engagement slots 6 are rotated in the direction of the respective workpiece edges 13; 23, while the plates 8; 9;10 are transported further by the through-feed conveyor to the position above the intermediate space 7 and are processed in the process, whereby the rear plate 9 has now become the new front plate, whereupon the suction hoods 3 of the edge milling tools 1; 2 are rotated again and then the now left second edge milling tool 2 is moved behind the rear edge 22 of the front plate 9 to the right and the first edge milling tool 1 is moved in front of the front edge 12 of a new third plate 10 to the left, so that the previously behind plate 9 is then edge milled on all sides, whereupon the process is repeated for the following plates 8; 9; 10 from opposite, inverted positions of the edge milling tools 1; 2.

Claims

1. Edge milling device comprising an edge milling tool (1) that has a rotationally driven milling tool (20) and an extraction hood (3) surrounding the milling tool having an engagement slot (6) provided laterally therein for a workpiece edge (12; 13; 22; 23) of a plate (8; 9; 10) to be machined, wherein a first edge milling tool (1) together with a second edge milling tool (2) are arranged below or above an intermediate space (7) between two plates (8; 9; 10) which are conveyed at a distance from one another and are briefly in a rest state on mutually parallel transverse guides and in each case a workpiece front edge (12) of a rear plate (9) in the transport direction (11) of successively arranged plates (8; 9; 10) can be machined from a first side to the opposite second side and a workpiece rear edge (22) of a front plate (8) opposite from the second side (23) to the first side (13) can be machined simultaneously or with a time delay, and wherein the extraction hoods (3) of both edge milling tools (1; 2) are arranged so as to be rotatable around the milling tools (20), and wherein when the plates (8; 9; 10) are transported further, the edge milling tools (1; 2) can be fastened laterally and the extraction hoods (3) with their engagement slots (6) can be rotated from the front and rear edges (12; 22) of the workpiece to the lateral edges (13; 23) of the workpiece, such that all workpiece edges (12; 13; 22; 23) of a plate (8; 9; 10) can be machined by two edge milling tools (1; 2) and milling dust can be permanently and completely extracted.

2. Edge milling device according to claim 1, characterized in that the extraction hood (3) is mounted so as to be rotatable about the axis of rotation of the milling tool (20).

3. Edge milling device according to either of the preceding claims, characterized in that servo motors act directly or indirectly on the extraction hoods (3) of the edge milling tools (1; 2) to generate the rotary movement.

4. Edge milling device according to any of the preceding claims, characterized in that contact rollers (14) are arranged on both sides of the engagement slot (6) on the extraction hood (3) of the edge milling tools (1; 2), which contact rollers, during operation, rest against the relevant workpiece edges (12; 13; 22; 23) of the plates (8; 9; 10).

5. Edge milling device according to any of the preceding claims, characterized in that the extraction hood (3) of the edge milling tools (1; 2) consists of a lower component (4) and an upper component (5), both of which are designed to be synchronously rotatable with respect to one another, and the upper component (4) partially overlaps the lower component (5) in an overlapping region (15), and the overlapping region (15) is larger than the thickness of the thickest plate (8; 9; 10) to be machined and in that the engagement slot (6) is formed in the upper component (4) and is downwardly open, the upper component (5) being designed to be height-adjustable relative to the lower component (5) and the engagement slot (6) being adaptable to the thickness of a plate (8; 9; 10) and / or a milling tool (20).

6. Edge milling device according to claim 5, characterized in that a receptacle (18) for a guide pin (19) or screw of the lower component (5) is arranged on the upper component (4) on both sides of the engagement slot (6), which guide pin extends from there upward into the receptacle (18) and which ensures the synchronous rotation of the upper part (4) of the extraction hood (3) and the lower part (5) of the extraction hood (3), as well as the height adjustment of the upper component (4) relative to the lower component (5) of the extraction hood (3).

7. Method for edge milling film overhangs of film-coated plates (8; 9; 10) of an edge milling device which are spaced apart from one another and moved discontinuously on a throughput conveyor, wherein the edge milling tools (1; 2), which are arranged below or above an intermediate space (7) between two plates (8; 9; 10) conveyed adjacent to one another and are briefly in a rest state, have two edge milling tools (1; 2) which are guided in parallel with one another and transversely to the transport direction (11) along the workpiece front and rear edges (12; 22) of two plates (8; 9; 10), of which a first edge milling tool (1) is placed in the transport direction (11) on the first side in front of a front edge (12) of a rear plate (9) following a front plate (8), and a second edge milling tool (2) is placed on the second side opposite the first side, behind a rear edge (22) of a front plate (8), and both edge milling tools (1; 2) then travel along both of these workpiece edges (12; 22) and machines them, changing sides in the process, whereupon the now right-hand first edge milling tool (1) then machines the right-hand workpiece edge (23) of this plate (9) and the second edge milling tool (2) machines the left-hand workpiece edge (13) of the following plate (9), while the plates (8; 9; 10) are transported further by the throughput conveyor to the position above the intermediate space (7), wherein the rear plate (9) now becomes the new front plate and then the now left-hand second edge milling tool (2) is moved to the right behind the rear edge (22) of the front plate (9) and the first edge milling tool (1) is moved to the left in front of the front edge (12) of a new third plate (10), such that the previously rear plate (9) is then edge-milled on all sides, whereupon the method is repeated in reverse for the following plates (8; 9; 10).

8. Method according to claim 7, characterized in that the edge milling tools (1; 2) have extraction hoods (3) open to the workpiece edges (12; 13; 22; 23) of the plates (8; 9; 10), which are rotated to suit the workpiece edge (12; 13; 22; 23) to be machined.

9. Method according to claim 7, characterized in that the width of the engagement slot (6) is adapted to the thickness of a plate to be machined (8; 9; 10).

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