Processing device for corrugated cardboard

Abstract

A machining device for machining a workpiece, which preferably consists at least partially of corrugated cardboard, comprising a drive unit which is configured to move at least one tool or two tools between a machining position and a rest position, characterized in that the drive unit drives at least one eccentric unit which rotates the at least one tool or the two tools between the machining position and the rest position, preferably by 30 degrees to 180 degrees, more preferably by 90 degrees.

Description

Technical field

[0001] The invention relates to a processing device for processing a workpiece, which preferably consists at least partially of corrugated cardboard, according to the preamble of claim 1, a processing system according to the preamble of claim 11 and a processing method according to the preamble of claim 12. State of the art

[0002] The present invention relates generally to the field of processing objects made of planar elements, such as paper and / or cardboard, in particular corrugated cardboard, for the production of boxes and cartons for packaging goods. The processing of, for example, corrugated cardboard into cartons requires, on the one hand, various work steps or processes, and on the other hand, various machines and devices for mechanical processing by deformation without material removal. The devices are therefore equipped with various tools for creasing, cutting, perforating, and scoring.

[0003] Machines for processing cardboard are described, for example, in DE 10 2015 011 399 B4 and US 11,400,680 B2. Machines of this type are primarily used for processing web-like materials, such as continuous cardboard webs or cardboard blanks cut into individual sheets and stacked, which are used, for example, in the packaging industry for the production of foldable boxes. Several processing steps are required to produce a foldable package, such as creasing, cutting, and perforating.

[0004] To manufacture products from corrugated or solid cardboard, slits and grooves are cut into the cardboard. Slitting involves cutting narrow indentations into the cardboard, while scoring causes local compression of the corrugated cardboard. The cardboard is later bent along the scoring lines, which are usually straight, to create a box from the flat sheet. A corresponding packaging template may have notches, cutouts, subdivisions, and / or folds that allow the template to be bent and / or folded into a box.

[0005] In the machining device of DE 10 2015 011 399 B4, the grooving tool is connected to a pneumatic or hydropneumatic adjusting element via a corresponding lever mechanism, and the cutting tool is connected to an electric or pneumatic adjusting element via a corresponding lever mechanism. A lever mechanism is available for adjusting a cutting tool, in the form of a multi-functional tool, arranged in a machining device, e.g., from the rest position to the machining position and back. A linear motor is used here as a drive and positioning system to move the multi-functional tool translationally in the vertical direction.

[0006] In the processing device of US 11,400,680 B2, a crossbeam has a cutting wheel and scoring wheels, which, as the crossbeam moves back and forth over the corrugated board, create creases, perforations, cuts, and / or notches in the board. While the scoring wheels rotate, they can remain essentially in the same vertical position relative to the processing device. In contrast, the cutting wheel can be selectively raised and lowered relative to the crossbeam. The cutting wheel is rotatably mounted on a cutting wheel frame, and the cutting wheel frame is movably connected to the crossbeam. Specifically, the cutting wheel frame is slidably mounted on one or more shafts and is biased toward the raised position by one or more springs located between the crossbeam and the cutting wheel frame.One or more solenoids are used to selectively move the cutter wheel frame, and thus the cutter wheel itself, from a raised rest position to a lowered working position. Each solenoid includes a plunger that extends or retracts linearly when the solenoids are activated or deactivated. When the plunger retracts, the cutter wheel frame and cutter wheel are raised by springs. Conversely, when the solenoids are continuously activated, the plunger extends, lowering the cutter wheel frame and cutter wheel so that the cutter wheel can cut the corrugated board.

[0007] The operating principle of the machining devices described above is based on linear motors with pneumatic and / or electric drives, which perform linear movements and, if necessary, convert the driving force according to the lever principle. These machining devices consume energy not only when moving the tools between the rest and machining positions, but also require significant amounts of energy in the machining position to hold or stabilize the tools in the machining area (in contact with the workpiece) by applying a constant holding force. If electric motors are used to move individual machine components, a complex and elaborate thermal management system for the heat-generating electric drives is necessary. The use of pneumatic drives is also energy-intensive and requires regular maintenance.Furthermore, pneumatic drives allow for less precise tool positioning than electric drives. Description of the invention

[0008] The invention is therefore based on the objective of providing a processing device, a processing system and a processing method with the aid of which a workpiece, which preferably consists at least partially of corrugated cardboard, can be processed in an energy-efficient manner and with high accuracy.

[0009] This problem is solved according to the invention by a processing device for processing a workpiece, which preferably consists at least partially of corrugated cardboard, according to the preamble of claim 1, a processing system according to the preamble of claim 11, and a processing method according to the preamble of claim 12. Particularly preferred embodiments of the invention are specified in the dependent claims.

[0010] The invention is based on the idea that an eccentric comprises a drive shaft to which at least one control disk is attached, the center of which lies outside the shaft axis, thereby converting rotary (torsional) movements into translational (lengthwise) movements. The greater the eccentricity of the eccentric, the greater the stroke, and vice versa.

[0011] In this context, it was recognized that an electric drive can be operated particularly energy-efficiently if it rotates an eccentric (with a tool attached to it) within a specific swivel angle range to set a desired vertical stroke (corresponding to the distance between a rest and machining position). Simultaneously, the swivel angle of the eccentric can be adjusted such that the electric drive only needs to apply a small holding torque to the eccentric shaft or its drive shaft to keep the tool in a machining position. In other words, both the rotation of the eccentric between a rest and machining position and its remaining in the machining position can be operated with minimal energy consumption.

[0012] For this purpose, a processing device according to the invention for processing a workpiece, which preferably consists at least partially of corrugated cardboard, has the following features: A drive unit configured to move at least one tool or two tools between a machining position and a rest position, characterized in that the drive unit drives at least one eccentric unit which rotates the at least one tool or the two tools between the machining position and the rest position, preferably by 30 degrees to 180 degrees, more preferably by 90 degrees.

[0013] The machining position and the rest position are two distinct positions in space between which the tool can move or rotate. The machining position is specifically a position in which the workpiece is being machined by the tool, i.e., in which the workpiece comes into contact with the tool. However, the tool can also be moved into or remain in the machining position even without the workpiece being present. Conversely, a rest position is a position in which the workpiece is not being machined by the tool, i.e., in which the workpiece does not come into contact with the tool. However, the tool can also be moved into or remain in the rest position even if the workpiece is present.

[0014] The described processing device is particularly advantageous for workpieces that preferably consist at least partially of corrugated cardboard, since corrugated cardboard must be processed in various ways for the production of boxes, such as by creasing, cutting, perforating, and / or scoring. While corrugated cardboard is inexpensive to purchase as a workpiece, it requires a high degree of processing precision to create a high-quality and functional end product. However, it is also conceivable that the workpiece (at least partially) consists of a material other than corrugated cardboard, which is essentially a flat, sheet-like material that can be folded into a box-like shape, such as wood, metal, and / or plastic. This material has a suitable thickness and weight so that it can be bent and / or folded into a box-like shape. The essentially flat orHowever, leaf-shaped material can also be processed in such a way that it is completely cut through and / or perforated, without being foldable into a box-like shape later.

[0015] A key advantage of the machining device described above is that the drive unit is directly coupled to the eccentric unit to move the one or two tools, without the need for additional gear units or mechanical coupling systems. This results in a compact and virtually maintenance-free device. Simultaneously, the use of the eccentric unit offers the advantage that one or two tools can be connected to a single drive unit. However, the eccentric unit can also be connected to just one or two tools. Alternatively, three, four, five, or even more tools can be coupled to the eccentric unit.

[0016] Another significant advantage is the energy-efficient operation of the machining device according to the invention, which is achieved by utilizing the specific swivel and rotational characteristics of the eccentric unit. Thus, a machining position of the eccentric unit (or the tool coupled to it), which can rotate 360 ​​degrees, corresponds to a bottom dead center on a circular path or a 6 o'clock position on a circular path along which the eccentric unit (or the tool coupled to it) moves during rotation. In this machining position, the drive only needs to apply a small holding torque to keep the eccentric unit (or the tool coupled to it) in this position during machining of the workpiece and to counteract rotation from this position.

[0017] A rest position of the 360-degree rotatable eccentric unit (or the tool coupled to it) corresponds to the top dead center on a circular path or a 12 o'clock position on a circular path along which the eccentric unit (or the tool coupled to it) moves during rotation. In this rest position, the drive only needs to apply a small holding torque to keep the eccentric unit (or the tool coupled to it) in this position and to counteract rotation from this position.

[0018] Another rest position of the 360-degree rotatable eccentric unit (or the tool coupled to it) corresponds to a 3 and / or 9 o'clock position on a circular path along which the eccentric unit (or the tool coupled to it) moves during rotation. Even in this rest position, the drive only needs to apply a small holding torque to keep the eccentric unit (or the tool coupled to it) in this position and to prevent it from rotating out of this position.

[0019] Due to the arrangement of the machining position and rest position(s) described above, the tool can be moved between these positions particularly effectively, efficiently, and quickly. The eccentric unit (or the tool coupled to it) is simply rotated 180 degrees (corresponding to a swivel angle of 180 degrees) to move between the machining position and a rest position. In other words, the eccentric unit (or the tool coupled to it) moves along a circular path between the 6 o'clock and 12 o'clock positions. A rotation of the eccentric unit (or the tool coupled to it) by 90 degrees (corresponding to a swivel angle of 90 degrees) is particularly advantageous for moving between the machining position and a rest position. In other words, the eccentric unit (or the tool coupled to it) moves along a circular path between the 6 o'clock and 9 o'clock positions and / or the 3 o'clock position.In this case, the drive requires very little energy to ensure the necessary vertical stroke of the tool. However, it is also conceivable that the eccentric unit (or the tool coupled to it) rotates at a swivel angle ranging from 30 to 180 degrees. This is advantageous when a specific vertical stroke needs to be set.

[0020] Furthermore, the energy-efficient operation of the drive unit also results from the fact that, due to the arrangement of the machining position and rest position(s) described above, there is a relationship between the vertical stroke of the eccentric unit (or the tool coupled to it) and the swivel angle of the eccentric unit that advantageously coincides with an acceleration phase, a constant speed phase, and a braking phase of the drive that rotates the eccentric unit. Therefore, the drive unit can operate particularly energy-efficiently during these phases.

[0021] In a preferred embodiment, the eccentric unit can have a drive shaft driven by the drive unit, which is preferably mounted to rotate in a fixed position. In other words, the drive unit directly drives the eccentric unit via the drive shaft. This results in a low-maintenance coupling system between the drive and the tool. Since the drive shaft itself is mounted to rotate in a fixed position, the forces acting on the eccentric unit during machining can be distributed across the entire machining device in a way that minimizes material damage.

[0022] Preferably, the eccentric unit can have one or two circular control discs directly connected to the drive shaft, with a longitudinal axis of the drive shaft running perpendicularly through the control disc(s) and eccentrically to the center of the control disc(s). In this way, the drive force can be transmitted directly to the control disc(s) via the drive shaft. Furthermore, two control discs can be actuated simultaneously with just one drive. This enables a compact configuration of the machining device. The circular shape of the control discs is also advantageous for arranging machining tools in a space-saving manner along the entire circumference of the control disc(s).

[0023] The circular control disk(s) is / are also designed so that the eccentric position of the drive shaft on the control disk(s), whose longitudinal axis runs perpendicularly through the control disk(s), can be varied / adjusted relative to the center point of the control disk(s). In other words, the distance between the center point of the control disk and a point on the control disk through which the longitudinal axis of the drive shaft runs perpendicularly is variable / differentiable. In this way, the drive shaft can be flexibly coupled to the control disk(s) to define a specific vertical stroke during rotation.

[0024] If two circular control discs are directly connected to the drive shaft, with one longitudinal axis of the drive shaft running perpendicularly through the two control discs and positioned eccentrically to the center of the control discs, the two circular control discs (in a side view along the longitudinal axis of the drive shaft or viewed parallel to the longitudinal axis) can be congruent or offset at both ends of the drive shaft. It is understood that the offset of the two circular control discs can also be caused by a different eccentric arrangement on the drive shaft.

[0025] Furthermore, the two circular control discs, arranged offset from each other on the drive shaft, can be positioned such that one tool connected to one control disc is in a machining position, while the second tool, connected to the second control disc, is in a rest position. After rotating the drive shaft, preferably by 90 degrees, the two circular control discs, arranged offset from each other on the drive shaft, can be positioned such that one tool connected to one control disc is in a rest position, while the second tool, connected to the second control disc, is also in a rest position.

[0026] More preferably, the at least one tool can be connected to the control disc via a ball bearing, or the two tools can be connected to the two control discs via two ball bearings, with the ball bearing(s) preferably arranged along an outer circumference of the control disc. This allows the tool to rotate, preferably along the circumference of the control disc. Thus, the tool or the machining device can remain in the machining position, and the workpiece can move past the (rotating) tool, preferably with the aid of a conveying device, the tool rotating along the control disc with the assistance of the ball bearing. It is understood that other plain bearings can also be used instead of the ball bearing. The ball bearings also offer the possibility of mounting the tool directly on (and preferably along the entire circumference of) the control disc.This allows for a compact design of the machining device.

[0027] In another preferred embodiment, the at least one tool or the two tools can have the form of a circular disk, in particular an annular disk, on which a first workpiece contact surface is arranged on a first outer circumference. This first workpiece contact surface preferably comprises a cutting edge and / or a grooved wheel. This has the advantage that the entire outer circumference of the tool can come into contact with the workpiece during rotation, and the workpiece contact surface wears evenly (with a delay). At the same time, the shape of a flat disk is advantageous for a compact machining device. The preferred design as an annular disk also ensures an even distribution of force from the tool to the control disk, which contributes to the stability and durability of the device. It is also conceivable that the first workpiece contact surface may (additionally) have sharpened edges, serrations, teeth, skids, or the like.

[0028] Preferably, a second workpiece contact surface can be arranged on a second circular outer circumference, which is preferably configured to roll over a surface of the workpiece. The second workpiece contact surface, which is arranged on the circular disk or ring disk, advantageously stabilizes the workpiece during machining by the first workpiece contact surface by rolling over the workpiece near the machining area without causing significant deformation of the workpiece.

[0029] Even more preferably, a third workpiece contact surface can be arranged on a third circular outer circumference, which is preferably configured to roll over a surface of the workpiece. The third workpiece contact surface, which is arranged on the circular disk or ring disk, advantageously stabilizes the workpiece during machining by the first workpiece contact surface by rolling over the workpiece near the machining area without causing significant deformation of the workpiece.

[0030] Preferably, the radius of the second circular outer circumference of the second workpiece contact surface and / or the radius of the third circular outer circumference of the third workpiece contact surfaces can be smaller than the radius of the second circular outer circumference of the second workpiece contact surface. In other words, the two and / or three circular workpiece contact surfaces of the circular tool form a stepped outer circumference that advantageously stabilizes the workpiece or workpiece surface near the machining area.

[0031] Even more preferably, the first workpiece contact surface can be arranged between the second and third workpiece contact surfaces. This enables symmetrical stabilization of the workpiece or workpiece surface near the machining area and consequently leads to a particularly high-quality machining result.

[0032] In another preferred embodiment, the drive unit can be an electric motor, such as a torque motor. This is advantageous because it operates with high dynamics, low backlash, and high torque. A torque motor, in simplified terms, is a large servo motor with a hollow shaft, optimized for high torque. For example, the torque motor can be a brushless DC motor. The torque motor can be used as an external rotor (stator inside, rotor outside) or as a conventional internal rotor (rotor inside, stator outside). This allows for fast and precise movement and positioning of the tool. Simultaneously, direct coupling of the drive shaft to the rotor of the internal rotor is possible, resulting in a compact design.

[0033] A machining system according to the invention comprises at least one machining device as described above, a storage device for holding the workpiece, which is preferably made at least partially of corrugated cardboard, a feeding device, and / or a conveying device for feeding and / or conveying the workpiece, wherein the machining device is linearly movable along the conveyed workpiece. With this machining system, a multitude of machining steps can be performed precisely and energy-efficiently on a workpiece. The machining system can have two, three, four, or a plurality of the machining devices described above, each of which can be moved individually and / or together along the workpiece. This system is highly flexible and can perform several machining operations on the workpiece (simultaneously).

[0034] An inventive method for machining a workpiece, preferably using the machining device or machining system described above, comprises the following steps: feeding and / or conveying a workpiece, which preferably consists at least partially of corrugated cardboard, to a machining device using a feeding device and / or a conveying device; Method of moving one or two tools of the machining device between a machining position and a rest position, wherein the one tool or the two tools are / are rotated eccentrically between the machining position and the rest position, preferably by 30 degrees to 180 degrees, more preferably by 90 degrees; and machining, preferably cutting and / or perforating, the workpiece;

[0035] This method allows for precise and energy-efficient machining of a workpiece. Furthermore, it is highly flexible and enables multiple machining operations to be performed (simultaneously) on the workpiece using a variety of the machining devices described above. Brief description of the drawings

[0036] Further features and advantages of the method and the device will become apparent from the following description of embodiments with reference to the accompanying drawings. These drawings show: Fig. 1a a first embodiment of the machining device in a rest position in an oblique view; Fig. 1b a first embodiment of the processing device in a rest position in a side view; Fig. 2a a first embodiment of the machining device in a further rest position in an oblique view; Fig. 2b a first embodiment of the processing device in a further rest position in a side view; Fig. 3a a first embodiment of the machining device in a machining position in an oblique view; Fig. 3b a first embodiment of the machining device in a machining position in a side view; Fig. 4a a second embodiment of the machining device in a machining position or rest position in an oblique view; Fig. 4b a second embodiment of the machining device in a machining position or rest position in a side view; Fig. 5a a second embodiment of the machining device in a rest position in an oblique view; Fig. 5b a second embodiment of the machining device in a rest position in a side view; and Fig. 6 a diagram showing the relationship between swivel angle and vertical stroke; Description of embodiments

[0037] Identical reference numerals shown in different figures denote identical, corresponding, or functionally similar elements. It is apparent to a person skilled in the art that individual features described in different embodiments can also be implemented in a single embodiment, provided they are not structurally incompatible. Likewise, different features described within a single embodiment can also be provided individually or in each sub-combination in several embodiments.

[0038] Fig. 1a shows an oblique view and Fig. Figure 1b shows a side view of a first embodiment of the machining device (2) in a rest position with a single tool (6) which is coupled to a control disk (4) by means of a ball bearing (5). The control disk (4) is attached to a distal end of a stationary rotatable drive shaft (3). The control disk (4) and the drive shaft (3) are connected to each other at a coupling point (11), in particular detachably, for example by a screw connection. However, other detachable and non-detachable connection types are also conceivable. The drive shaft (3) is connected to a non-removable Fig. Figures 1a / b show an electric torque motor connected to the drive shaft (3). This motor can be connected to the drive shaft (3) in such a way that it rotates the shaft 360 degrees. The drive shaft (3) is, for example, designed as part of the rotor of an internal rotor (torque motor) or coupled to it. The torque motor is thus located near the drive shaft (3) or is arranged around it, forming a compact machining device (2).

[0039] In this embodiment, the tool (6) is designed as an annular disk, with a ball bearing (5) arranged on the (inner) circumference of an inner circular recess of the annular disk, which is simultaneously arranged on an outer circumference of the control disk (4). The tool (6) is designed with a first (7) and a second (8) workpiece contact surface, which are arranged along corresponding outer circumferences of the annular tool (6). The first (7) and second (8) workpiece contact surfaces form a stepped annular disk, wherein a radius of an annular circle of the first workpiece contact surface (7) is larger than a radius of an annular circle of the second workpiece contact surface (8) or larger than a radius of an annular circle of the first step (8) formed by the second workpiece contact surface (8). The first (7) and second (8) workpiece contact surfaces, respectively, are arranged along the outer circumferences of the first step (8) formed by the second workpiece contact surface (8).The first step (8) extends accordingly around the entire outer circumference of the ring-shaped tool (6). The tool (6) also has a third workpiece contact surface or a third step, which, however, is located in . Fig. Figure 1a / b is not shown. The third workpiece contact surface is identical to the second workpiece contact surface (8), with the second (8) and third workpiece contact surfaces being arranged symmetrically on opposite sides of the annular tool (6) to form two circularly symmetrical steps around two outer circumferences of the circular disk. The first workpiece contact surface (7) lies between the second (8) and third workpiece contact surfaces and is designed as a knife edge. The first workpiece contact surface (7) may (additionally) have a grooving wheel (10) which forms only a portion of the first workpiece contact surface (7). In other words, the grooving wheel (10) occupies 5%, 10%, 15%, 20%, 25%, or 50% of the first workpiece contact surface (7).

[0040] It is understood that the second (8) and third workpiece contact surfaces form a surface that does not necessarily have to come into contact with the workpiece during machining. In other words, the tool (6) can be positioned in the machining position or rotated into this position without the second (8) and third workpiece contact surfaces touching the workpiece, but only the first workpiece contact surface (7). A corresponding vertical stroke can be achieved, for example, by a specific swivel angle or by adjusting the eccentric coupling between the drive shaft (3) and the control disc (4).

[0041] In Fig. In 1a / b, the machining device (2) is in a rest position. This means that the workpiece contact surfaces (7, 8, 9) of the tool (6) of the machining device (2) are not in contact with the workpiece (1), regardless of whether a workpiece (1) is located within a machining area of ​​the machining device (2) or the machining system. In other words, the 360-degree rotatable eccentric unit or control disk (4) and the tool (6) coupled to it are at a top dead center on a circular path, or at a 12 o'clock position on a circular path along which the eccentric unit or control disk (4) and the tool (6) coupled to it move during rotation. In this rest position, the vertical distance between the center point of the annular tool (6) and a surface of the workpiece (1) facing away from the tool (6) is exactly the height H + E.

[0042] Fig. Figures 2a / b show the machining device (2) of the first embodiment in a second rest position. The eccentric unit or control disc (4), which can be rotated 360 degrees, and the tool (6) coupled to it are located at the 3 o'clock and 9 o'clock positions, respectively, on a circular path along which the eccentric unit or control disc (4) and the tool (6) coupled to it move during rotation. To move the machining device or the eccentric unit or control disc (4) and the tool (6) coupled to it between the first and second rest positions, the eccentric unit or the drive shaft is rotated by 90 degrees. In this rest position, the vertical distance between the center point of the annular tool (6) and a surface of the workpiece (1) facing away from the tool (6) is exactly the height H.

[0043] Fig. Figures 3a / b show the machining device (2) of the first embodiment in a machining position. The eccentric unit or control disc (4), which can be rotated 360 degrees, and the tool (6) coupled to it are located in a 6 o'clock position on a circular path along which the eccentric unit or control disc (4) and the tool (6) coupled to it move during rotation. To move the machining device or the eccentric unit or control disc (4) and the tool (6) coupled to it between the first rest position and the machining position, the eccentric unit or the drive shaft is rotated 180 degrees. Movement between the second rest position and the machining position corresponds to a rotation of 90 degrees.

[0044] In the machining position, the perpendicular distance between the center point of the ring-shaped tool (6) and a surface of the workpiece (1) facing away from the tool (6) is less than the height H - E. In the machining position in Fig. 1a / b, at least the first workpiece contact surface (7) (but not the second (8) and / or third workpiece contact surface) is in contact with the workpiece (1) in such a way as to cut through and / or perforate it. That is, the outer circumference of the first workpiece contact surface (7) of the tool (6) can pass from an upper to a lower surface of the plate-shaped workpiece (1). If, on the other hand, the workpiece (1) is only scored and / or a groove is impressed by the first workpiece contact surface (7) of the tool (6), the outer circumference of the first workpiece contact surface (7) of the tool (6) is located between the upper and lower surfaces of the plate-shaped workpiece (1). That is, the outer circumference of the first workpiece contact surface (7) of the tool (6) is located between the upper and lower surfaces of the plate-shaped workpiece (1) without passing through it.Here, the vertical distance between the center point of the ring-shaped tool (6) and a surface of the workpiece (1) facing away from the tool (6) is less than the height H, but greater than H - E. In the two rest positions and the machining position, the distance E is the distance between the center point of the ring-shaped tool (6) (the control disk (4)) and a point on the control disk (4) through which the longitudinal axis of the drive shaft (3) passes perpendicularly. It is understood that the distance H can be changed according to a specific rotation of the eccentric unit or the drive shaft (3). The distance E is referred to here as the vertical stroke of the machining device (2).

[0045] Fig. Figures 4a / b show the machining device (2) of a second embodiment. The machining device (2) according to the second embodiment differs from the machining device (2) according to the first embodiment only insofar as it comprises two control discs (4) with two tools (6) coupled thereto, the control discs (4) being arranged at a distal end of the drive shaft (3). Fig. 4a / b The machining device (2) according to the second embodiment is simultaneously in a machining and a rest position. In other words, one of the two control discs (4) with the tool (6) coupled to it is in the machining or rest position. Here, the machining position of one control disc (4) with the tool (6) coupled to it corresponds exactly to the configuration of the control disc (4) with the tool (6) coupled to it of the first embodiment described above in the machining position. At the same time, the rest position of the other control disc (4) with the tool (6) coupled to it corresponds exactly to the configuration of the control disc (4) with the tool (6) coupled to it of the first embodiment described above in the rest position, in which the eccentric unit, which can be rotated by 360 degrees, is located.The control disc (4) and the tool (6) coupled to it are located in a 12 o'clock position on a circular path along which the eccentric unit or the control disc (4) and the tool (6) coupled to it move during rotation. In other words, one of the two tools (6) of the machining device (2) is machining the workpiece in the machining position, while the other tool (6) is in the rest position. In this position, the two circular control discs (4) or the ring-shaped tools (6) are (in a side view along the longitudinal axis of the drive shaft (3) or with a viewing direction parallel to the longitudinal axis (corresponds to the right side in ). Fig. 4) offset at both distal ends of the drive shaft (3).

[0046] In Fig. 5a / b, the machining device (2) according to the second embodiment is in a rest position, i.e., the two control discs (4) with the tool (6) coupled to them are in the rest position. Here, the configuration of the two control discs (4) with the tool (6) coupled to them in the rest position corresponds exactly to the configuration of the control disc (4) with the tool (6) coupled to it in the rest position described above for the first embodiment, in which the eccentric unit, which can be rotated 360 degrees, or the control disc (4), and the tool (6) coupled to it are located in a 3 o'clock or 9 o'clock position on a circular path, along which the eccentric unit, or the control disc (4), and the tool (6) coupled to it move during rotation. In this position, the two circular control discs (4) or the ring-shaped tools (6) (in a side view along the longitudinal axis of the drive shaft (3) orwith a viewing direction parallel to the longitudinal axis (corresponds to the view in . Fig. 5b) arranged congruently at both distal ends of the drive shaft (3). In order to move the machining device (2) according to the second embodiment between the machining position and a rest position, the eccentric unit or the drive shaft must be rotated by 90 degrees. It is understood that other specific degrees of rotation can also be implemented, so that the tool (6) only scores and / or embosses the workpiece (1) as described in embodiment 1.

[0047] Fig.Figure 6 shows a diagram illustrating the relationship between the swivel angle and the vertical stroke. This relationship is exemplified for both the eccentric unit with one control disc (4) according to embodiment 1 and the eccentric unit with two control discs (4) according to embodiment 2. Here, the relationship between the vertical stroke of the eccentric unit (or the tool (6) coupled to it) and the swivel angle of the eccentric unit can be superimposed with an acceleration phase, a constant velocity phase, and a braking phase of the drive that rotates the eccentric unit.In other words, the acceleration phase, in which the rotation of the drive shaft is accelerated, takes place, for example, between a swivel angle of 0 degrees and 60 degrees; the constant speed phase takes place between a swivel angle of 60 degrees and 120 degrees; and the braking phase takes place between a swivel angle of 120 degrees and 180 degrees. This allows the drive unit to operate particularly energy-efficiently during these phases. Reference symbol list 1 workpiece 2 processing device 3 Drive shaft 4 Control disc 5 ball bearings 6 tools 7 first workpiece contact surface 8 second workpiece contact surface 9 third workpiece contact surface 10 grooved wheel 11 Coupling point QUOTES INCLUDED IN THE DESCRIPTION

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

[0000] DE 10 2015 011 399 B4 [0003, 0005] US 11,400,680 B2 [0003, 0006]

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