Chamfer milling head

Abstract

Chamfer milling head (1) for film-coated furniture, floor, wall or other panels with a film overhang beyond their panel edges, comprising two upper and lower chamfer milling tools (2; 3) adjustable from one another on a rotary axis (4), each chamfer milling tool (2; 3) having a base body (5) with cutting blades (6; 8) spaced radially apart from each other and distributed around its circumference, the cutting blades having an axial extension and a radial distance from each other in the direction of the opposite chamfer milling tool (3; 2) which creates a clearance (7) large enough to allow the cutting blades (8; 6) of the respective other chamfer milling tool (2;3) rotated by an intermediate angle on the axis of rotation (4) and adjustable to a depth of engagement, characterized in that the base body (5) is axially divided and the base body parts are joined together by means of screw connections on the axis of rotation (4) of the chamfer milling head (1) and are slidably or fixedly adjustable to this axis.

Description

[0001] The invention relates to a chamfer milling head for film-coated furniture, floor, wall or other panels and for panels with a film overhang over their panel edges, with two upper and lower chamfer milling tools whose distance from one another is adjustable on a rotation axis.

[0002] An edge milling group for processing panels made of wood or similar is known, DE 10 2015 204 325 A1, which has two separate edge milling tools mounted on a vertical carriage in order to be able to process the edges of panels of different thicknesses.

[0003] The disadvantage of this known edge milling group is that when milling off the film overhang, long material threads can be created that can wrap around the axis of rotation of the chamfer milling tools, which can lead to a standstill of the entire edge milling group.

[0004] The object of the invention is to provide a chamfer milling head which completely prevents the formation of such material threads from milled-off film excess and thus allows safe, uninterrupted continuous operation of the chamfer milling head.

[0005] The solution to this problem is achieved in conjunction with the features of the preamble of the first patent claim according to the invention in connection with the technical features of its characterizing part in that each chamfer milling tool has a base body with cutting blades that are radially spaced from one another and distributed over its circumference, which cutting blades have an axial extension and a radial distance from one another in the direction of the opposite chamfer milling tool, which creates a free space that is so large that the cutting blades of the other chamfer milling tool can engage there in an adjustable depth when rotated by an intermediate angle on the rotational axis.The cutting blades form cylindrical enveloping surfaces, particularly in the interlaced area, but also in the non-interlaced areas, so that the ends of material threads cannot work their way through to the axis of rotation of the chamfer milling head, but are chopped up beforehand by the cutting blades and then radially thrown out of the chamfer milling head and transported away from the chamfer milling head via a suction hood.

[0006] This ensures that the chamfer milling head is not hindered in its use by excessively long material strands, nor does it require a milling process to be interrupted due to clogging caused by accumulated material. Because the cutting blades of the opposing chamfer milling tools remain interlocked at every spacing position, this operational reliability can be guaranteed for all different panel thicknesses. The mutual adjustability of the distance between the involved chamfer milling tools also leads to the particularly advantageous feature that the cutting speed of the cutting blades on the workpiece is the same regardless of the material thickness, allowing the chamfer milling head to always operate at an optimal speed. This further drastically increases process reliability in panel production and ensures that the required quality is achieved.

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

[0008] According to a particularly preferred embodiment of the invention, the cutting blades each have an outer cutting edge and an inner cutting edge over their axial extension in the direction of rotation, which run parallel to the axis of rotation of the chamfer milling head and which are connected to one another via a straight or curved main working edge, which represents the actual main tool of the cutting blades of the chamfer milling tool and thus of the entire chamfer milling head.

[0009] Advantageously, the two chamfer milling tools are designed to be movable relative to each other to such an extent that the inner diameters of the main working cutting edges overlap each other, whereby very thin plates can be machined at the edges, whereby a V-shaped or D-shaped chamfer can be produced.

[0010] According to a preferred embodiment of the invention, this main working cutting edge has a length that is only slightly longer than a chamfer to be produced by it, so that the length can generally be kept short and hardly any speed tolerances arise over the changing radius of the chamfer milling tools.

[0011] According to a particularly preferred embodiment of the subject matter of the invention, the cutting blades of the chamfer milling tool are provided with cutting plates in the direction of rotation of the chamfer milling head, which are fixed thereto in a material-to-material manner, in particular by soldering, said cutting plates being equipped with the inner, outer and main working cutting edges, so that the cutting plates can be made of a material optimized for their use, be it hard metal or diamond cutting blades.

[0012] Preferably, the cutting edges parallel to the rotational axis are designed as chopping tools for shredding the film strips of a separated film overhang, thereby ensuring that such strips cannot wrap around the rotational axis of the milling device and hinder the operation of the milling head.

[0013] In an advantageous embodiment of the invention, the base body is designed to be axially divided, so that the base body parts can be brought together by means of screw connections on the axis of rotation of the chamfer milling head and can be fixed thereon in a movable or fixed manner, which considerably simplifies the assembly of the milling head.

[0014] To ensure concentricity of the chamfer milling head, the chamfer milling tools are equipped with a self-centering holder, which ensures precise mounting of the chamfer milling head in a milling device.

[0015] Also advantageous is a method for producing a chamfer milling head in which the base body of the chamfer milling tool is manufactured in one piece and the cutting plates are soldered onto the cutting blades, whereupon connecting holes for connecting means of the chamfer milling tool are introduced into it and the chamfer milling tool is subsequently balanced and then the base body (5) is divided in the axial longitudinal direction so that it can be easily mounted and dismounted on a rotary axis as intended.

[0016] An embodiment of the invention is described in more detail below with reference to the drawings. They show: Fig. 1 a chamfer milling head in a maximum spread position of the chamfer milling tools, Fig. 2 a top view of the chamfer milling head according to Fig. 1, and Fig. 3 a chamfer milling head with the chamfer milling tools moved together to their maximum.

[0017] The chamfer milling head 1 for milling film overhangs over the edges of film-coated furniture, floor, wall or other panels consists of two upper and lower chamfer milling tools 2; 3, which are mutually adjustable in distance on a rotation axis 4, wherein Fig. 1 a chamfer milling head 1 with the chamfer milling tools 2; 3 moved apart to their maximum extent is shown and in Fig. 3 the chamfer milling head 1 the Fig. 1 in a maximum retracted position of the chamfer milling tools 2; 3.

[0018] Each edge milling tool 2; 3 has a base body 5 with cutting blades 6; 8 which are spaced apart radially and distributed over its circumference and which have an axial recess in the direction of the opposite chamfer milling tool 3; 2 and a radial distance from one another which creates a free space 7 which is large enough for the cutting blades 8; 6 of the other chamfer milling tool 2; 3 to engage there rotated by an intermediate angle on the rotation axis 4, wherein the engagement depth is adjustable and thus the chamfer milling head with its main working cutting edges 12; 22 can be optimally adjusted to the thickness of a plate 17 coated with films 16 exactly to the position of the films 16.

[0019] The cutting blades 6; 8 have, over their axial extension in the direction of rotation 9 of the chamfer milling head 1, an outer cutting edge 10; 20 and an inner cutting edge 11; 21 which run parallel to the axis of rotation 4, as well as a main working cutting edge 12; 22 which connects these cutting edges 10; 11; 20; 21 and forms the main cutting edge of a chamfer milling tool 2; 3 and which has a corresponding shape, be it a 45° bevel to the flat surfaces of the panels 17 to be machined or else a curved contour.

[0020] To achieve maximum durability of the chamfer milling head 1, the cutting blades 6; 8 are equipped with cutting plates 14; 24, which have the cutting edges 10; 11; 12; 20; 21; 22, wherein the cutting plates 14; 24 are firmly fixed in the direction of rotation 9 of the chamfer milling tools 2; 3 on the cutting blades 6; 8, in particular are soldered thereto. For the sake of clarity, however, this is only shown in Fig. 1 and Fig.2 on each of the cutting blades 6; 8 of each chamfer milling tool 2; 3. With alternating directions of rotation, both sides of the cutting blades 6; 8 can also be equipped with such cutting plates 14; 24.

[0021] The main working edges 12; 22 each have a length that is only slightly longer than the bevel of a film 16 to be produced by them, provided that only the protruding films 16 are to be removed from the plates 17 with the bevel milling head 1. Otherwise, these main working edges 12; 24 can also be designed differently, for example, if bevels are to extend into the body edges of the plates 17.

[0022] The cutting edges 10; 11; 20; 21 parallel to the rotational axis 4 produce an inner and an outer cylindrical envelope around the chamfer milling tools 2; 3 and serve as chopping tools for shredding film strips of milled film excesses of a film 16 serving as a coating on a plate 17.

[0023] The base body 5 of a chamfer milling tool 2; 3 is axially divided, and the base body parts are joined together by means of screw connections on the rotational axis 4 of the chamfer milling head 1 and slidably secured thereon, which enables simplified assembly of the chamfer milling tools 2; 3. Furthermore, the chamfer milling tools 2; 3 have a self-centering holder 13, which ensures precise assembly of the chamfer milling head 1 in a milling device. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102015204325 A1

[0002]

Claims

[1] Chamfering head (1) for film-coated furniture, floor, wall or other panels and with a film overhang over their panel edges, with two upper and lower chamfering tools (2; 3) mutually adjustable in distance on a rotary axis (4), characterized by that each chamfer milling tool (2; 3) has a base body (5) with cutting blades (6; 8) which are spaced apart from one another radially and distributed over its circumference and which have an axial extent and a radial distance from one another in the direction of the opposite chamfer milling tool (3; 2) which creates a free space (7) which is so large that the cutting blades (8; 6) of the other chamfer milling tool (2; 3) can engage there in an adjustable depth when rotated by an intermediate angle on the rotation axis (4). [2] Chamfer milling head (1) according to claim 1, characterized bythat the cutting blades (6; 8) have, along their axial extension in the direction of rotation (9), an outer cutting edge (10; 20) and an inner cutting edge (11; 21) which run parallel to the axis of rotation (4), as well as an angled, straight or curved main working edge (12; 22) connecting these cutting edges (10; 11; 20; 21). [3] Chamfer milling head (1) according to claim 2, characterized by that the two chamfer milling tools (2; 3) are designed to be movable relative to one another to such an extent that the inner diameters of the main working cutting edges (12; 22) overlap one another and very thin plates with foils can be machined. [4] Chamfer milling head (1) according to claim 2, characterized by that the cutting blades (6; 8) are equipped with cutting plates (14; 24) with the cutting edges (10; 11; 12; 20; 21; 22) and the cutting plates (14; 24) are fixed in a material-to-material manner on the cutting blades (6; 8) of the chamfer milling tool (2; 3) in the direction of rotation (9) of the chamfer milling head (1). [5] Chamfer milling head (1) according to claim 2, 3 or 4, characterized by that the main working cutting edge (12; 22) has a length which is slightly longer than a bevel produced by it. [6] Chamfer milling head (1) according to one of the preceding claims 2 to 5, characterized by that the cutting edges (10; 11; 20; 21) parallel to the axis of rotation (4) are designed as chopping tools for shredding film strips of a separated film overhang. [7] Chamfer milling head (1) according to one of the preceding claims, characterized by that the base body (5) is axially divided and the base body parts are joined together by means of screw connections on the axis of rotation (4) of the chamfer milling head (1) and are fixed thereon in a displaceable or fixed manner with adjustable spacing. [8] Chamfer milling head (1) according to one of the preceding claims, characterized by that the chamfer milling tools (2; 3) have a self-centering holder (13). [9] Method for producing a chamfer milling head (1) according to one of the preceding claims, characterized by that a base body (5) of the chamfer milling tool (2; 3) is manufactured in one piece and the cutting plates (14; 24) are soldered onto the cutting blades (6; 8), whereupon connecting bores for connecting means of the chamfer milling tool (2; 3) are introduced into this and the chamfer milling tool (2; 3) is subsequently balanced and then the base body (5) is divided in the axial longitudinal direction.

Images