CN115401748A

CN115401748A - Method for machining plate-shaped workpieces and machining device

Info

Publication number: CN115401748A
Application number: CN202210568063.1A
Authority: CN
Inventors: 威廉·卡尔姆巴赫
Original assignee: Homag Holzbearbeitungssysteme GmbH
Current assignee: Homag GmbH
Priority date: 2021-05-26
Filing date: 2022-05-24
Publication date: 2022-11-29
Also published as: DE102021113528A1; EP4094910A1

Abstract

The present invention relates to a method for machining a plate-shaped workpiece and a machining device for machining a plate-shaped workpiece. Such a method and such a processing device are used in particular in the field of the wood-handling and processing industry.

Description

Method for machining plate-shaped workpieces and machining device

Technical Field

Background

In the field of furniture and construction element manufacture, workpieces are often provided with a coating material at their narrow sides. After the application of the coating material, it can protrude with respect to the narrow side of the workpiece that serves as a boundary, so that the protruding narrow-side coating material needs to be subsequently reworked. In this case, there is a particular requirement for reworking in the region of what is known as the gate slot edge, in which a plurality of stepped narrow faces are provided and the coating material protrudes on multiple sides in the corner region of the workpiece. Therefore, manual reworking is usually performed due to the complexity of the geometry. However, this approach leads to additional very time-consuming process steps in the production process.

Disclosure of Invention

The object on which the invention is based is to provide a method for machining plate-shaped workpieces and a machining device for machining plate-shaped workpieces, by means of which the effort for the rework can be reduced.

The method according to the invention comprises the method features according to the invention. Other preferred embodiments are listed herein. Furthermore, the invention provides a processing device, wherein the processing device or aspects thereof can be used within the scope of the method.

According to the invention, a method for machining plate-shaped workpieces by means of a machining device is provided, wherein the machining device has a milling cutter and at least one profiling element (Tastelement). The method comprises the following steps: detecting a workpiece, preferably a workpiece edge of the workpiece, in particular a workpiece leading edge or a workpiece trailing edge of the workpiece; placing the profiling element at the main side of the workpiece; performing a first machining by means of the milling cutter during the movement of the profile element over the edge of the workpiece; placing the profile element on the impact side, in particular at the lower or upper impact edge; and performing a second machining by means of the milling cutter during the movement of the profile element over the edge of the other workpiece.

The method has the advantage that manual reworking can be dispensed with. This leads to an increase in the production rate, since the production flow, as hitherto, is not reduced by the associated reprocessing. Furthermore, it is possible to dispense with turning facilities for manual reworking and to dispense with the production area associated therewith.

During the machining process, workpieces can be produced with a quality that remains unchanged, said workpieces having a high quality due to the corresponding visual and tactile sensation.

The "workpiece main side" (in a horizontally oriented workpiece) is the upper or lower side of the workpiece in the vertical direction. The "workpiece main side" is also referred to as the wide side in the case of plate-shaped workpieces. One "workpiece narrow side" or also a plurality of "workpiece narrow sides" (e.g., at the gate slots) is located between the workpiece main sides.

The "workpiece edge" is the transition region between the workpiece sides, for example between the workpiece main side and the workpiece narrow side.

The "impact side" is the side of the overhang or projection of the workpiece between the narrow sides of the workpiece. The impact side can be designed as an impact underside or as an impact upside. In particular, the impact side is oriented parallel to the main workpiece side. According to a further embodiment, the imaginary plane formed by the impact side can also intersect the imaginary plane formed by the main side of the workpiece.

Preferably, the workpiece is moved during the method and the machining device is synchronized with the movement of the workpiece. Thereby, high productivity can be ensured.

According to one embodiment, the profile element is raised after the first machining has been performed. Thereby, damage at the workpiece can be avoided.

It is also proposed that the machining device be moved away from the workpiece after the second machining operation has been carried out, so that the machining device can be moved into an initial position.

Preferably, the milling cutter has a length of 50mm or less, in particular 35mm or less, so that machining of different workpiece types can be carried out without damage. In particular, the milling cutter is preferably cylindrical, without a radius.

According to a further embodiment, it is provided that the milling cutter has a diameter of 20mm or less, in particular 15mm or less, so that a relatively fine machining operation can be carried out. In particular, the milling cutter relates to a finger milling cutter.

Preferably, the impact side is oriented parallel to the main workpiece side. This design can be a gate slot of a plate-shaped workpiece.

Preferably, the workpiece is made of wood or a wood material and is provided with a cladding material at least on the main side of the workpiece and on the impact side. Such a workpiece can be, in particular, a door panel.

Furthermore, the placing step and the first and second machining steps can be carried out at a second workpiece edge, in particular at a workpiece leading edge or a workpiece trailing edge. This can occur, for example, when a workpiece passes by.

The invention also relates to a machining device for machining plate-shaped workpieces. The processing device comprises: a milling cutter, in particular cylindrical; and at least one profile element having a diameter equal to or greater than the machining diameter of the milling cutter. In this way, a targeted processing of the excess of the coating material is achieved, wherein further sections of the workpiece are protected.

According to a preferred embodiment, the milling cutter and the profiling element are arranged coaxially or can be positioned coaxially.

Such a processing device can have a control device in order to carry out the method described above.

The machining device can comprise at least two profile elements which can be moved from a working position to a rest position, respectively. This enables the machining device to machine the workpiece leading edge and the workpiece trailing edge.

Preferably, the milling cutter has a diameter of 20mm or less, preferably 15mm or less. Thereby, a relatively fine machining process can be performed. In particular, the milling cutter is a face mill.

According to one embodiment, the at least one profiling element can be a profiling roller. The profiling rollers can roll on the workpiece, in particular without damage, and guide the milling cutter to perform the machining process.

Preferably, the profile element is arranged on the side of the end section of the milling cutter. Thereby, the guidance of the milling cutter is to some extent performed at or to the side of the tip of the milling cutter.

In particular, the milling cutter is not associated with other abutment surfaces which serve as stops for positioning. Usually, such a contact surface is provided in sections around the milling cutter in order to provide a constant distance between the milling cutter and the workpiece to be machined during machining. According to this embodiment, such an abutment surface can be eliminated.

Drawings

Further features and advantages emerge from the following description of a preferred embodiment with reference to the attached drawings.

FIG. 1 shows a schematic view of a processing apparatus with an edge processing device according to one embodiment of the present invention;

FIG. 2 shows a detail view of the edge machining apparatus according to FIG. 1;

fig. 3 shows an exemplary process for machining a front section of a workpiece in the direction of movement of the workpiece.

Detailed Description

Fig. 1 shows a side view of an embodiment of a processing device 1 according to the invention. The processing device 1 comprises a processing unit 20, which is accommodated at the frame 2 of the processing device 1.

The processing device 1 is designed in particular for processing workpieces made of wood or wood material, in particular plate-shaped workpieces having a plurality of narrow sides. Such workpieces are machined during the passage.

The carriage 2 of the processing device 1 is movable in the feed direction V via a guide device. By means of the movement of the carriage 2, the machining device 1 can be moved in a feed direction V, in which the workpiece is also moved by means of a conveyor (not shown) in order to carry out a machining process at the workpiece W during the movement of the workpiece.

A suction hose 5 connected to the processing unit 20 is also provided at the stand 2. By means of the suction hose 5, machining residues, such as chips or dust, can be removed from the machining region of the machining unit 20.

The machining device 20 comprises a finger cutter 21 having a cylindrical configuration and a relatively small diameter. Since the finger cutter 21 does not have a radius, but is rather of cylindrical design, a rounded workpiece edge is not introduced during the machining by means of the finger cutter 21, but rather the finger cutter is guided over the workpiece edge as explained below in order to cut off the excess. Due to the design of the finger milling cutter 21, it is possible to rework the edge of the workpiece, in particular the corner region at the edge of the gate slot, without colliding with other sections of the workpiece W.

The milling tool 21 is guided here only by the profiling means. No further contact surfaces, in particular no stops for positioning the milling cutter 21, are provided.

In particular, the machining device 1 comprises a first copying device 30 which is movable from a working position to a rest position (and vice versa). Profiling device 30 comprises a base 31, profiling roller carrying element 32 and profiling roller 33 (profiling element) mounted at profiling roller carrying element 32. The base 31 is movable along a rail 34. In order to provide for movement of the base 31, and thus movement of the elements carried by the base 31, a first drive 35 is provided.

The diameter of the profiling roller 33 is configured to be equal to or larger than the machining diameter of the milling cutter 21. This enables the projecting part of the coating material to be specifically machined without damaging other sections of the workpiece.

Similar to the first profiling device 30, the second profiling device 40 comprises a base 41, a profiling roller carrying element 42 and a profiling roller 43 (profiling element) mounted therein. The base 41 is movable along a track 44, wherein the movement is initiated by a second drive 45. Thereby, the second copying means 40 can be moved from the working position to the rest position (and vice versa). The profiling roller 43 is constituted to have a diameter equal to or larger than the machining diameter of the milling cutter 21, similarly to the profiling roller 33.

Subsequently, an exemplary process for machining the workpiece leading edge of the workpiece W is described.

First, the processing device 1 is in a waiting position below the workpiece W, wherein the workpiece W is moved by means of a transport device (not shown), for example a conveyor belt. If the workpiece W is detected by means of the light barrier (detection device), the machining device 1 is started by means of the path control device immediately after the leading edge of the workpiece has passed the machining unit 20. The machining device 1 is synchronized with the movement of the workpiece W during this time and moves together with the workpiece W during the steps described later.

The processing device 1 is moved such that the processing device 1 places the profiling roller 33 at the lower side of the workpiece (one of the main sides of the workpiece) under rail control (position P1). The finger cutter 21 extends here in the same axial direction as the contour roller 33.

Subsequently, the corner regions of the workpiece W are machined by means of the finger cutter 21 in such a way that: the profiling roller 33 is moved across the radius of the workpiece edge W1 (toward the position P2).

Subsequently, the machining device 1 with the profiling roll 33 and the finger cutter 21 is accelerated away from the workpiece W and rests at the lower side of the overrun (position P3). The finger milling cutter 21 removes the edge overhang at the corner region of the workpiece W from now on in such a way that: the profiling roller 33 is guided (moved in the direction of position P4) over the radius of the further workpiece edge W2.

From now on, the machining device 1 is accelerated away from the workpiece W, so that the profiling roller 33 and, as a result, the finger cutter 21 are positioned above (or, as a variant, on the side of) the workpiece W (position P5).

After the workpiece W has passed the machining device 1, the machining device 1 is brought back into the initial position again, so that a subsequent workpiece can be machined.

The process for machining the trailing edge of the workpiece can be carried out in the reverse order, with the machining device 1 being moved behind the workpiece W. The process can be carried out in the vertical direction, also from top to bottom, when machining the workpiece leading edge (fig. 3) as well as the workpiece trailing edge.

It is obvious to a person skilled in the art that individual features, which are described in each case in different embodiments, can also be implemented in a single embodiment, as long as the features are not structurally incompatible. Likewise, different features that are described within the scope of a single embodiment can also be designed in multiple embodiments separately or in any suitable subcombination.

Claims

1. A method for machining a plate-shaped workpiece (W) by means of a machining device (1),

wherein the machining device (1) has a milling cutter (21) and at least one profiling element (33, 43), the method comprising the steps of:

detecting a workpiece (W), in particular a workpiece edge of the workpiece (W);

-placing the profiling element (33, 43) at the primary side of the work piece;

performing a first machining with the milling cutter (21) during the movement of the profile element (33, 43) over the workpiece edge (W1);

-placing the profile element (33) at the impact side;

during the movement of the profile element (33, 43) over the other workpiece edge (W2), a second machining operation is carried out by means of the milling tool (21).

2. The method as set forth in claim 1, wherein,

wherein the workpiece (W) is moved and the machining device (1) is synchronized with the movement of the workpiece (W).

3. The method according to any one of the preceding claims,

wherein the profile element (33, 43) is lifted from the workpiece (W) after the first machining has been performed.

4. The method according to any one of the preceding claims,

wherein the machining device (1) is moved away from the workpiece (W) after the second machining is performed.

5. The method according to any one of the preceding claims,

wherein the milling cutter has a length of 50mm or less, in particular 35mm or less.

6. The method according to any one of the preceding claims,

wherein the impact side is oriented parallel to the workpiece main side.

7. The method according to any one of the preceding claims,

wherein the workpiece (W) is made of wood or a wood material and is provided with a cladding material at least at the workpiece main side and at the impact side.

8. The method according to any one of the preceding claims,

wherein the placing step is performed and the first and second machining steps are performed at a second workpiece edge, in particular a workpiece leading edge or a workpiece trailing edge.

9. A machining apparatus (1) for machining a plate-like workpiece (W), comprising:

a detection device for detecting a workpiece (W), in particular a workpiece edge of the workpiece (W);

in particular cylindrical milling cutter (21), and

at least one profile element (33, 43) having a diameter equal to or greater than the machining diameter of the milling tool (21).

10. Machining device (1) according to claim 9,

wherein the milling cutter (21) and the profiling element (33, 43) are coaxially arranged or can be positioned coaxially.

11. Machining device (1) according to claim 9 or 10,

comprises at least two profile elements (33, 43) which are each movable from a working position into a rest position.

12. Machining device (1) according to one of claims 9 to 11,

wherein the milling cutter (21) has a diameter of 20mm or less, preferably 15mm or less.

13. Machining device (1) according to one of the claims 9 to 12,

wherein the milling cutter (21) has a length of 50mm or less, in particular 35mm or less.

14. Machining device (1) according to one of claims 9 to 13,

wherein the at least one profiling element (33, 43) is a profiling roller.

15. Machining device (1) according to one of claims 9 to 14,

wherein the milling cutter (21) is not associated with other abutment surfaces serving as stops for positioning.