EP3412416A1 - Cutting head with at least one blade unit, cutting machine with a cutting head and blade for a cutting head - Google Patents

Abstract

The invention relates to a cutting machine (100) and a cutting head (100) therefor, having an X-axis (102), a Y-axis (104) and a Z-axis (106) which are each perpendicular to one another Contact side (120), which in intended use facing a cutting material (300), and with a at least partially movable support (150) fixed blade unit (90). The blade unit (90) is provided for cutting the material to be cut (300) along a cutting path (306) in a predetermined cutting direction (108) and has a cutting edge (22) leading in the direction of the Y-axis (104) and one of the leading edge (30). 22) in the direction of the Y-axis (104) trailing edge (32). In the mounted state, the leading edge (22) and the trailing edge (32) each have a different position and / or extension in the direction of the X-axis (102). The blade unit (90) is reciprocable along the X axis (102) by means of a spring element (160). A contact element (110) is provided for application to the material to be cut (300). The blades (22, 32) of the blade unit (90) are opposite to the contact element (110) at least in the cutting operation in the direction of the X-axis (102) over.

Description

State of the art

The invention relates to a cutting head with at least one blade unit, a cutting machine with a cutting head and a blade for a cutting head.

Outer packagings, in particular made of cardboard, are used to ship goods of various kinds. In the commercial sector, high quantities are required. These are sometimes time-consuming manually opened or opened with automated cutting machines.

From the EP 2573001 A1 is a cutting machine is known that automates packaging and cut gently.

Special challenges arise when opening outer packaging in food production. Thus, such outer packaging are often deformed, such as when fats are liquid or filled in the soft state in lined with protective film outer packaging, solidify in the outer packaging and deform the outer packaging. When opening the outer packaging, the content is rigid. When opening the protective film, however, must not be damaged, otherwise the content must be discarded.

Disclosure of the invention

An object of the invention is to provide a cutting head which allows a particularly gentle for the contents of outer packaging opening of outer packaging.

Another object is to provide a cutting machine with such a cutting head.

Another object is to provide a blade for such a cutting head.

The objects are achieved by the features of the independent claims. Favorable embodiments and advantages of the invention will become apparent from the other claims, the description and the drawings.

The features listed individually in the claims can be combined in a technologically meaningful manner and can be supplemented by explanatory facts from the description and by details from the figures, with further embodiments of the invention are shown.

It is proposed according to a first aspect of the invention, a cutting head with an X-axis, a Y-axis and a Z-axis, each perpendicular to each other, with a contact side, which faces a material to be cut in the intended use, and with a The blade unit is provided for cutting the material to be cut along a cutting path in a designated cutting direction. Furthermore, the blade unit has a cutting edge leading in the direction of the Y-axis and a cutting edge following the leading edge in the direction of the Y-axis. The blades are associated with one or more blades. In the assembled state, the leading edge and the trailing edge each have a different position and / or extent in the direction of the X-axis. The blade unit is reciprocable along the X axis by means of a spring element.

There is provided a contact element for application to the material to be cut, and the blades of the blade unit are opposite to the contact element at least in the cutting operation in the direction of the X-axis over.

Characterized in that the blade unit with at least two cutting by means of a spring element along the X-axis is movable back and forth, can always be achieved on the material to be cut a constant contact pressure of the cutting head. When attaching the cutting head to the material to be cut, the blade unit can deflect. Advantageously, a constant depth of cut of the one or more blades of the blade unit can be achieved. Furthermore, it can be ensured that the cutting head rests reliably on the cutting material. This is favorable if the cutting head is intended to be fastened to a robot arm for cutting, since in this way a decoupling of the robot arm force from the contact pressure of the cutting head on the material to be cut is possible.

The contact element forms the basis on which the depth of cut of the at least one blade of the blade unit is related. About the supernatant of the particular leading edge or the blade with the leading edge on the contact element outwardly away from the contact element, for example, the depth of cut can be determined with which this blade or cutting edge cuts from the outside into the material to be cut. The contact element may conveniently be formed as Gleitfuß, which is intended to slide when cutting on the cutting material.

The contact element, in particular in the form of a Gleitfußes is intended intended for surface placement on the cutting material. In particular, in the direction of the Z-axis, the sliding foot can be designed to be several times wider than the at least one blade in the direction of the Z-axis. Due to the large-scale design of the Gleitfußes the cut material is relieved when slicing and a punctual introduction of stress, which could damage an adjacent to an outer packaging content avoided. According to a favorable embodiment, the Gleitfuß may be longer in the direction of the Y-axis than an outer side of the holder in the direction of the Y-axis. Thus, a surface load of the material to be cut can be reduced by the cutting head, which protects the contents of an outer packaging, and the leadership of the cutting head to be improved when cutting.

The blades may be associated with separate blades, a leading blade and a trailing blade. Alternatively, the blades may be united in a single blade having a leading portion with the leading edge and a trailing portion with the trailing edge. The blade may be made in one piece or composed of several parts to form a blade. The blade can be attached directly to the cutting head or arranged on the cutting head via an intermediate holder. In particular, the blade unit is mounted with one or more blades on a movable part of the cutting head, preferably on a carriage.

Due to the different positioning and / or extent in the X-axis, the cutting edges have different depths of cut relative to the material to be cut. Advantageously, the leading edge is intended to scratch or scrape the material to be cut from the outside, while the trailing edge may be provided to completely cut open the material to be cut along the cutting path. The leading edge therefore expediently cuts less deeply into the material to be cut than the trailing edge. With particular advantage, the trailing edge can extend in depth to below the material to be cut, such as the material of an outer packaging made of cardboard, so that the trailing edge can cut the outer packaging from the inside out, while the leading edge scratching the outer packaging only from the outside or cuts. This has, among other things, the nice advantage that an outer packaging can be cut open from all sides, virtually free in the room. The material to be cut does not have to be stored on a substrate and pressed against it. The outer packaging can be gently cut open for its contents.

In particular, the spring element may be a compression spring which engages a carriage movable up and down along the X-axis on a guide to which the blade unit is attached by one or more blades.

The spring element can be clamped between the carriage and a pivotable about the Z-axis abutment, in particular, the abutment can be fixed in the direction of the X-axis. The distance between the abutment and slide can be adjusted, so that the contact pressure of the cutting head can be adjusted on the cutting material. Alternatively, instead of the abutment, an actuator or the like may be provided.

In an optional embodiment, the cutting head may have at least one blade of a respective blade unit on at least two of its sides or on several of its sides. Optionally, a contact surface or a contact element may be provided on each of the sides. Depending on which blade is in use, the corresponding side of the cutting head forms a contact side to the cutting material. The blades may be identical, or different blades may be provided. For example, a composite of individual cutting heads can be assembled to form a cutting head component, so that compression and pivoting of the respective corresponding blade on the respective contact side to the material to be cut during the cutting operation is possible.

According to a favorable embodiment, the holder to which the blade unit is attached, when cutting about the Z-axis to be pivotable. This makes it possible to improve the adaptation of the movement of the one or more blades of the blade unit attached to the cutting head to the course of the cutting path on the material to be cut. Characterized in that the blade unit is pivotable about the Z-axis, the cutting head can be guided in a straight line, while the one or more blades of the blade unit pivot about the Z-axis and therefore also a cutting material curved in the cutting direction, such as a deformed outer packaging. can follow. When cutting, the longitudinal direction Y-axis of the cutting head is expediently oriented in the cutting direction.

Advantageously, a combination of the spring-loaded movement of the blade unit in the direction of the X-axis and the pivoting about the Z-axis allows ensuring a constant contact pressure of the cutting head on Schneidgut with straight leadership of the cutting head along the Schneidguts and the compensation of tolerances by a curvature of the cut material is caused so that the one or more blades of the blade unit can follow the curved contour of the cut material. The combination results in a particularly favorable cutting behavior of the cutting head.

According to a favorable embodiment, the holder may have a slide guide and a movable in the direction of the X-axis slide on which the blade unit is mounted. Advantageously, the carriage can be arranged on one side of the carriage guide. A pivotable about the Z axis or pivotable retaining element may be arranged on the opposite side of the carriage guide. The holding element can be provided, for example, for coupling the cutting head to a robot arm. The holding element preferably forms a fixed reference point, with respect to which the blade unit is movable and / or pivotable during cutting.

According to a favorable embodiment, a return device can be provided on the holder, which sets the holder after pivoting about the Z-axis in a central position. Advantageously, the return device may comprise one or more shock absorbers. For example, the restoring device may be mounted on the side of the carriage guide opposite the carriage and act on the holding element which is rotatable relative to the carriage and to which the blade unit is fastened.

According to a favorable embodiment, the leading and trailing edge can be positioned so that a material to be cut can be cut from the leading edge from one side and from the trailing edge at least from the opposite side. As a result, the cut material can be cut free in the room. An outer box in the form of a box of cardboard can be cut open at one or more of the six surfaces.

According to a favorable embodiment, the trailing edge may be associated with a leading finger, which may be intended to reach under the material to be cut. In particular, the leading finger can be arranged below the trailing edge. Advantageously, the finger can pierce laterally in an outer packaging and so between the cutting material, such as a cardboard layer, and the content, get. When moving the cutting head along the cutting path, the finger can gently separate the material to be cut from the contents of the outer packaging. This can prevent one of the cutters accidentally cutting into the contents or a protective packaging surrounding them.

The finger expediently has a blunt tip and can advantageously correspond in width in the Z-axis direction to the width of the at least one blade in the Z-axis direction. Preferably, the finger is formed as a straight rod. Optionally, the upper side of the finger, which faces the bottom of the material to be cut during cutting, may be provided with a cutting edge.

According to a favorable embodiment, the finger can start from the trailing edge and extend in the direction of the leading edge. This results in a compact design, which ensures that the leading edge can remain above the finger when cutting.

According to a favorable embodiment of the leading finger may project beyond the leading edge in the direction of the Y-axis. This results in increased safety when cutting, as the leading edge remains above the finger when cutting and the interior of the outer packaging is protected by the finger in front of the leading edge.

According to a favorable embodiment, in particular the trailing blade and / or the finger can be designed as a flat part. This allows easy production of blades for the cutting head, for example as stampings. Alternatively, the finger may be formed with a T-shaped profile, so that it is widened on its outer side, which faces away from the holder of the cutting head. When cutting can be protected in this way the interior of an outer packaging when the finger under the cut material, such as a wall of the outer packaging, engages and then moves between the content and wall along the cutting direction.

According to a favorable embodiment, the blade unit may have a trailing blade with trailing edge, which may be L-shaped with a thigh and a longitudinal leg, wherein the trailing edge can be arranged on the thigh, in particular at the transition to the longitudinal leg, and the longitudinal leg of the leading Can form fingers. This compact construction results in a blade that can reliably cut open a cut material scratched in particular on its surface by a leading blade. Alternatively, the blade unit may have a round blade as a trailing blade. Optionally, fingers can be attached separately to the blade unit.

According to a favorable embodiment of the finger on its upper side, which faces the holder of the material to be cut, have a cutting edge. The cutting edge is then facing the intended condition of the underside of the material to be cut. Advantageously, the material to be cut can be cut outwards from its rear side, which is particularly gentle on the contents of an outer packaging. An outer packaging can then be cut especially content-preserving from the inside.

According to a favorable embodiment, the blade unit may have a triangular blade as a leading blade. Advantageously, the cutting material can be scratched from the top with the tip of the triangular blade.

According to a favorable embodiment, the blade unit may comprise a blade which comprises both the leading and the trailing edge. The blades are then associated with sections of the blade. This allows easy mounting of the blade on the cutting head, since fewer assembly components are necessary than with separate blades. The two cutting edges can be formed in this case in a one-piece component. Alternatively, a leading blade with the leading edge and a trailing blade with the trailing edge may be assembled into one component. This also allows more complex designs of cutters that can be adapted for specific cutting tasks.

It is proposed according to another aspect of the invention, a cutting machine with a cutting head for cutting material to be cut, wherein the cutting head has an X-axis, a Y-axis and a Z-axis, each perpendicular to each other, and having a contact side, the The blade unit is provided for cutting the material to be cut along a cutting path in a designated cutting direction and has a leading in the direction of the Y-axis and one of the cutting edge leading edge in the direction of the Y-axis trailing edge. The blades are associated with one or more blades. In the assembled state, the leading edge and the trailing edge each have a different position and / or extension in the direction of the X-axis. The cutting head can be guided in a straight line along the material to be cut in relation to the material to be cut.

The contact side of the cutting head can move parallel to the material to be cut. The blade unit is reciprocable along the X axis by means of a spring element. There is provided a contact element for application to the material to be cut, with respect to which the at least one blade protrudes at least in the cutting operation in the direction of the X-axis.

The mobility of the blade unit along the X-axis allows a gentle opening of outer packaging and protects the contents of outer packaging from damage when cutting them. When cutting, the longitudinal direction of the cutting head is expediently oriented in the direction of the cutting direction. Advantageously, due to the spring element of the cutting head when fitting to the material to be cut and when cutting along the material to be cut with constant contact pressure on the surface of the material to be cut.

The advantages of the cutting head according to the invention in its embodiments have already been explained above.

According to a favorable embodiment, the holder can follow by pivoting about its Z-axis of a curved surface of the material to be cut. Also a dented outer packaging can be opened gently.

According to a favorable embodiment, the cutting head can be attached to a robot arm, in particular a robot arm, which can be movable along six axes. Advantageously, the cutting head can cut open sliced food freely in space, such as a cardboard box at will on each of its cardboard surfaces. Characterized in that the at least one blade of the blade unit is movable up and down in the direction of the X-axis, the cutting head can be guided in a straight line to the cutting material, which simplifies the control. By virtue of the at least one blade of the blade unit, which is movable in the direction of the X axis, the force of the robot arm can be decoupled from the contact pressure of the cutting head with respect to the material to be cut. In particular, by combining the mobility of the at least one blade in the direction of the X-axis and the pivoting about the Z-axis, a reliable and gentle slicing of the material to be cut can be achieved.

An outer packaging can be cut open from all sides by means of the cutting head attached to the robot arm.

Alternatively, the cutting head can be driven on a gantry by means of a linear motor in three axes. Characterized in that the cutting head is pivotable about its Z-axis and preferably in the direction of the Y-axis is movable up and down, the cutting head can be performed with a linear motor in a straight line parallel to the cutting material, which simplifies the control. Tolerances of a curved surface of the material to be cut can be compensated for by the pivotability of the holder of the at least one blade.

It is proposed according to a further aspect of the invention, an L-shaped blade for a blade unit of a cutting head, with a thigh and a longitudinal leg, wherein a cutting edge is arranged on the thigh, in particular at the transition to the longitudinal leg, and the longitudinal leg forms a leading finger. Such a blade can be advantageously combined, for example in a cutting head, with a second blade, which precedes the L-shaped blade and scores a cutting material in the cutting direction, while the L-shaped blade cuts through the cutting material entirely. Advantageously, the high leg is parallel to an X-axis of the cutting head and the longitudinal leg parallel to a Y-axis of the cutting head.

The finger has on its upper side, which are intended to be facing the material to be cut, a cutting edge. Then, the L-shaped blade can remove the cut material from the back, i. from the inside, cut.

It is proposed according to a further aspect of the invention, a blade for a blade unit of a cutting head, which is formed by a flat member having a leading portion with a leading edge and a trailing portion with a trailing edge, wherein the trailing portion has a leg and a longitudinal leg and the cutting edge of the leading portion is inclined with respect to the thigh and to the intended cutting direction and points towards the longitudinal leg. The leading edge is intended to scrape the material to be cut from above above the material to be cut.

Advantageously, two cutting edges are available which can scrape a material to be cut on the one hand with the leading edge and on the other hand can cut through with the trailing cutting edge. Preferably, the leading edge acts on one side of the material to be cut, while at least a portion of the trailing edge can cut the material to be cut from the opposite side.

Conveniently, the leading edge may be inclined to the intended cutting direction.

Advantageously, the longitudinal leg in its longitudinal extent in the flat element can extend further than a free end of the leading edge projected onto the longitudinal extent. This can be avoided that the blade with its leading edge cuts too deeply into the material to be cut, as is located when cutting the longitudinal leg below the leading blade.

According to a favorable embodiment, the trailing portion may be L-shaped with a thigh and a longitudinal leg, wherein the trailing edge is arranged on the thigh, in particular at the transition to the longitudinal leg, and the longitudinal leg forms a leading finger. Advantageously results in a compact design, in which the finger during the cutting process between slices, such as an outer packaging, and content can be arranged and safely separates the contents of the outer packaging. The contents of the outer packaging are protected against damage during cutting.

According to a favorable embodiment, the finger on its upper side, which is intended to face the material to be cut, have a cutting edge. Advantageously, the cutting material can be cut or scored from two sides. This allows cutting in every position of the material to be cut. This particular must not be placed on a solid surface.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawings, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

einen Schneidkopf nach einem Ausführungsbeispiel der Erfindung, in drei verschiedenen Positionen in Schneidrichtung entlang einer Schnittbahn;

Fig. 2

ein Schnittbild mit zwei Klingen mit in Schneidrichtung vorlaufender Dreiecksklinge und nachlaufender L-förmigen Klinge;

Fig. 3

eine Seitenansicht eines Schneidkopfs nach einem Ausführungsbeispiel der Erfindung mit zwei Klingen nach Figur 2;

Fig. 4

eine isometrische Ansicht des Schneidkopfs nach Figur 3;

Fig. 5

eine isometrische Ansicht des Schneidkopfs nach Figur 3;

Fig. 6

eine Ansicht der in Schneidrichtung gesehenen Rückseite des Schneidkopfs aus Figur 3;

Fig. 7

eine Draufsicht auf einen Schnitt durch den Schneidkopf aus Figur 3 entlang der Linie VII-VII;

Fig. 8

ein Schnittbild mit einer einteiligen Klinge mit in Schneidrichtung vorlaufender Schneide und nachlaufender Schneide;

Fig. 9

eine Seitenansicht eines Schneidkopfs nach einem Ausführungsbeispiel der Erfindung mit einer einteiligen Klinge nach Figur 8;

Fig. 10

eine isometrische Ansicht des Schneidkopfs nach Figur 8;

Fig. 11

eine isometrische Ansicht des Schneidkopfs nach Figur 8;

Fig. 12

ein Schnittbild mit zwei Klingen mit in Schneidrichtung vorlaufender Dreiecksklinge und nachlaufender Rundklinge;

Fig. 13

eine Seitenansicht eines Schneidkopfs nach einem Ausführungsbeispiel der Erfindung mit zwei Klingen nach Figur 12;

Fig. 14

eine isometrische Ansicht des Schneidkopfs nach Figur 13;

Fig. 15

eine Schneidmaschine in Form einer Portalanlage mit drei Achsen; und

Fig. 16

eine Schneidmaschine mit einem Roboterarm mit sechs Achsen.

They show by way of example:

Fig. 1

a cutting head according to an embodiment of the invention, in three different positions in the cutting direction along a cutting path;

Fig. 2

a sectional view with two blades with cutting blade in the forward direction triangle blade and trailing L-shaped blade;

Fig. 3

a side view of a cutting head according to an embodiment of the invention with two blades after FIG. 2 ;

Fig. 4

an isometric view of the cutting head after FIG. 3 ;

Fig. 5

an isometric view of the cutting head after FIG. 3 ;

Fig. 6

a view of the seen in the cutting direction back of the cutting head FIG. 3 ;

Fig. 7

a plan view of a section through the cutting head FIG. 3 along the line VII-VII;

Fig. 8

a sectional view with a one-piece blade with leading edge in the cutting edge and trailing edge;

Fig. 9

a side view of a cutting head according to an embodiment of the invention with a one-piece blade after FIG. 8 ;

Fig. 10

an isometric view of the cutting head after FIG. 8 ;

Fig. 11

an isometric view of the cutting head after FIG. 8 ;

Fig. 12

a sectional view with two blades with leading in the cutting direction triangle blade and trailing round blade;

Fig. 13

a side view of a cutting head according to an embodiment of the invention with two blades after FIG. 12 ;

Fig. 14

an isometric view of the cutting head after FIG. 13 ;

Fig. 15

a cutting machine in the form of a portal system with three axes; and

Fig. 16

a cutting machine with a robot arm with six axes.

Embodiments of the invention

In the figures, like or equivalent components are numbered with like reference numerals. The figures are merely examples and are not intended to be limiting.

Before describing the invention in detail, it should be noted that it is not limited to the respective components of the device and the respective method steps, since these components and methods may vary. The terms used herein are intended only to describe particular embodiments and are not intended to be limiting. In addition, if singular or indefinite articles are used in the specification or claims, this also applies to the majority of these elements unless the overall context clearly makes otherwise clear.

In the following used directional terminology with terms such as "left", "right", "top", "bottom", "before" "behind", "after" and the like is only for better understanding of the figures and in no case a limitation of Represent generality. The illustrated components and elements, their design and use may vary in the light of the consideration of one skilled in the art and be adapted to the respective applications.

FIG. 1 shows a cutting head 100 according to an embodiment of the invention in three different positions POS1, POS2, POS3 in a cutting direction 108 along a cutting path 302 which is produced in a 300 cuttings, for example an outer packaging in the form of a packaging carton. The cutting head 100 is seated on the cutting material 300 with a contact element 110, in particular a sliding foot.

The cutting head 100 in this example supports a blade unit 90, which consists of two blades 20, 30 following one another in the cutting direction 108. The blade 20 leading in the cutting direction 108 has a cutting edge 22 and the blade 30 trailing in the cutting direction (108) of the leading blade 20 has a cutting edge 32. In this case, the leading cutting edge 22 scores the cutting material 300, while the trailing edge 32, the scratched cutting material 300 completely cuts. Alternatively, a version with a blade with multiple blades or multiple blades is possible.

As can be seen in the figure, the cutting head 100 can be guided in a straight line along a cutting direction 108. The cutting head 100 is in contact with the cutting material 300 with a constant contact pressure, although the cutting material 300 has a curved surface. The cutting head 100 according to the invention is designed so that the blade unit 90 with its blades 20, 30 can follow the curved surface by a tilting of the blades 20, 30 is possible and optionally an axial movement of the blades 20, 30. The constant contact pressure is reaches a spring element 160.

In the first position POS1, the cutting head 100 is inclined so as to follow the rise of the camber (in the figure from POS1 to POS2). In the position POS2, the cutting head 100 is set parallel to the straight line of the cutting direction 108, and in position POS3, the cutting head 100 is inclined to follow the falling edge of the curl of the cut 300 (in the figure from POS2 to POS3). It is not necessary that the content of the cut material 300 is yielding.

The FIGS. 3 to 7 show an embodiment of a cutting head 100 with a blade unit 90, which consists of two blades 20, 30, in detail. FIG. 2 shows a sectional view of the two blades 20, 30 with longitudinally 104 leading triangle blade 20 and a trailing L-shaped blade 30 without the cutting head 100, while FIG. 3 a side view of the cutting head 100 with the blades 20, 30 after FIG. 2 shows. The cutting head 100 is in the FIGS. 4, 5 and 6 additionally shown in different isometric views while FIG. 7 a view on the section VII-VII in FIG. 3 shows.

The cutting head 100 ( Figures 3-7 ) has an X-axis 102, a Y-axis 104 and a Z-axis 106 and holds the two blades 20, 30, which protrude at its one contact side 120 with the cutting material outside forming in the figure down. For example, the cutting head 100 is cuboid. The Y-axis 104 in the longitudinal direction of the cutting head 100 is oriented in the cutting direction 108.

The leading blade 20 with the cutting edge 22 and the trailing blade 30 with the cutting edge 32 each have a different extent in the direction of X-axis 102 so that they intersect at different depths in the 300 cut product.

The leading blade 20 is formed as a triangular blade with a tip that faces between two sections of a cutting edge 22 to 300 Schneidgut. With the leading blade 20, the cutting material 300 can be scratched along the cutting path 306 on its surface.

The trailing blade 30 has an L-shaped form with a high leg 40 and a longitudinal leg 42, wherein a cutting edge 32 is formed on the upper leg 40 at the transition to the longitudinal leg 42 and the longitudinal leg 42 forms a leading finger 50. The leading blade 20 ends above the finger 50. The finger 50 may optionally have a cutting edge 56 on its upper side, which is intentionally facing the material to be cut 300 (in FIG FIG. 2 marked with broken reference line). With the trailing blade 30, the scratched cutting material 300 along the cutting path 306 can be completely cut. In this case, at least a portion of the cutting edge 32 can cut the material to be cut 300 from below.

The finger 50 may pierce the cut product 300, such as an overwrap, and gently separate the contents 308 from the blades 20, 30 so that the contents 308 are securely separated from the trailing edge 32.

On the outside of the cutting head 100 which forms a contact side 120 with the material 300 to be cut, a contact element 110 in the form of a sliding foot 111 is provided, which is provided for surface contact on the material 300 to be cut. The leading blade 20 protrudes through an opening in Gleitfuß 111. In the direction of the Z-axis 106 of the Gleitfuß 111 is formed by a multiple wider than the blades 20, 30 in the Z-axis direction 106th In the direction of the Y-axis 104th the sliding foot 111 is longer than the contact side 120 of the cutting head 100 and projects forward with an upwardly curved portion 116. Due to the large length 112 and the large width 114 of Gleitfußes 111, the cutting head 100 can stand up with little surface load on the cutting material 300 and slide during the cutting process correspondingly light and gentle on the surface.

The cutting head 100 has a holder 150 for the blades 20, 30, which has a plate-like slide guide 152 and along it along the X-axis movable carriage 54 carrying the blades 20, 30 comprises. On the side opposite the carriage 154 flat side of the cutting head 100, a plate 132 is arranged on which a round support member 130 is rigidly fixed, which is rigidly connected to a robot arm or a corresponding holder in a gantry machine. Plate 132 and retaining element 130 may also be formed in one piece.

The slide guide 152 of the holder 150 is pivotable relative to the plate 132 and the holding member 130 about the Z-axis 106. For this purpose, elongate openings 138 are provided in the plate 132, are screwed through the screws 136 in the carriage guide 152 of the holder 150. The screws 136 may move as the holder 150 pivots in the apertures 38. In the center of the round holding element 130 is a shaft 134 (FIG. FIG. 7 ), which allows the pivoting movement of the holder 150 relative to holding element 130 and plate 132. Thus, the blades 20, 30 on the mount 150 are pivotal about both the Z-axis 106 and the height along the X-axis 102 and may thus follow a curvature of the cut 300 when the cutting head 100 is in a straight line along the Cutting direction 108 is guided.

By means of a return device 180, for example in the form of two shock absorbers, a swiveled holder 150 can be easily returned to its central position. The return device 180 is rigidly secured to the carriage guide 152 and is supported against the plate 132 from.

The carriage 154 has, on its outer flat side, elongated holes 146 in which screws 144 are longitudinally movable which secure the carriage 154 to the carriage guide 152 of the holder 150 as the carriage 154 is moved relative to the carriage guide 152 along the X-axis 102.

The trailing blade 20 is fastened in this example by means of a fastener 156 on the carriage 154 with unspecified mounting screws. The leading blade 20 is disposed between the carriage 154 and the carriage guide 152 of the holder 150. Both blades 20, 30 are aligned longitudinally 104, as particularly in FIG. 6 is apparent.

The carriage 154 can be moved against a spring element 160 along the X-axis in one direction, and the spring element 160 pushes the carriage 154 in Opposite direction. On the plate 132, a plate 132 is opened toward the bracket 132 as an abutment 170 for the spring element 160 laterally screwed by screws 140 in a slot 142 in the bracket, so that a fixed height of the formed as a bracket abutment 170 with respect to the retaining element 130 and the spring tension can be adjusted. The spring element 160 is clamped between the abutment 170 formed as a U-shaped frame and the carriage 154 of the holder 150. The spring element 160 is designed as a compression spring and guided with a pin in the interior of the spring element 160 in the X direction 102.

The FIGS. 8 to 11 show a cutting head 100 according to another embodiment of the invention, in which a blade unit 90, consisting of a blade 10 with two cutting edges 22, 32, is provided. The structure of the cutting head 100 corresponds in terms of holding element 130 with plate 132, holder 150 with slide guide 152 and carriage 154, formed as Gleitfuß 111 contact element 110, restoring element 180, spring element 160 and abutment 170 of the embodiment in the FIGS. 3 to 7 , so that reference is made to avoid unnecessary repetition on the local description.

FIG. 8 shows a cross-sectional view of the formed as a one-piece component blade 10 with in the direction of a Y-axis 104 of the cutting head 100 leading portion 26 with a cutting edge 22 and a trailing portion 36 with a cutting edge 32 without cutting head 100th Die FIGS. 9 to 11 show various views of the cutting head 100.

The blade 10 is formed as a flat element, wherein the cutting edge 22 of the leading portion 26 is inclined toward the X-axis 102 in the cutting direction 108. The trailing portion 36 has a thigh 40 in the X-axis direction and a longitudinal leg 42 in the Y-axis direction. The cutting edge 32 of the trailing portion 36 is formed parallel to the X-axis 102 and arranged at the transition to a longitudinal leg 42. The longitudinal leg 42 extends from the cutting edge 32 and forms a leading finger 50 which extends below the two cutting edges 32 and 22.

Like in the FIG. 8 can be seen, the finger 50 engages under the cutting material 300, while the leading blade is located above the 300 Schneidguts. The finger 50 may be on its top, that of the holder 150, and in practice intended to the cutting material 300 faces, optionally a cutting edge 56 (in FIG. 8 marked with broken reference line). With the trailing cutting edge 32, the cutting material 300 carved by the leading cutting edge 22 can be completely cut along the cutting path 306. In this case, at least one region of the cutting edge 32 can cut the material to be cut 300 from below.

The blade 10 is disposed between the carriage 154 and the carriage guide 152 and fixed to the carriage 154 (FIG. FIG. 11 ).

The FIGS. 12 to 14 show a cutting head 100 according to another embodiment of the invention. The structure of the cutting head 100 corresponds in terms of holding element 130 with plate 132, holder 150 with slide guide 152 and carriage 154, formed as Gleitfuß 111 contact element 110, restoring element 180, spring element 160 and abutment 170 of the embodiment in the FIGS. 3 to 7 , so that reference is made to avoid unnecessary repetition on the local description.

FIG. 12 shows a sectional view in the direction of a Y-axis 104 of the cutting head 100 with a blade unit 90, consisting of two blades 20, 30, with leading blade 20 in the form of a triangular blade and a trailing blade 30 in the form of a round blade. The blades 20, 30 are aligned in the direction of the Y-axis 104. The trailing blade 30 is formed as a round blade and can therefore roll on the cutting material 300.

The Figures 13 and 14 show views of the cutting head 100. In this embodiment, no leading finger is provided, which extends under the trailing blade 30 to the front. Optionally, however, such a finger may be provided.

The FIGS. 15 and 16 show cutting machines 200, where a cutting head 100 may be used to automatically cut up packages as cutting 300.

FIG. 15 shows a cutting machine 200 in the form of a gantry with a linear actuator 202 with three axes. The cutting material, not shown, can be transported on a conveyor belt 210 in the transport direction 206 to the cutting station. There, the outer packaging by a relative movement between outer packaging and cutting head 100 are cut. In this case, the cutting head 100 can be moved relative to the outer packaging in the height and in the transport direction 206 and transversely thereto. Optionally, the outer package can be passed for cutting on a standing cutting head 100, which is positioned accordingly.

FIG. 16 shows a cutting machine 200 with a robotic arm 208 with six axes. The robot arm 208 holds a cutting head 100 and guides it along an unillustrated outer packaging to cut it. The outer packaging may be positioned on a conveyor belt 210.

The cutting head 100 can be guided parallel to the material to be cut in a straight line relative to the material to be cut. The holder of the cutting head 100 can follow a curved surface of the material to be cut by pivoting about its Z-axis 106. Due to the construction of the cutting head 100, each surface of the outer packaging can be cut open at will. The outer packaging does not necessarily have to be cut open from above. In particular, the finger 50 ( FIGS. 2 to 6 . 8 to 11 ) on the cutting head 100 that a surface of the outer packaging can be cut open virtually in space.

Claims (16)

Cutting head (100) having an X-axis (102), a Y-axis (104) and a Z-axis (106), each perpendicular to one another, with a contact side (120), the intended use of a cutting material (300 ), and
with a blade unit (90) attached to an at least partially movable support (150),
wherein the blade unit (90) is provided for cutting the material to be cut (300) along a cutting path (306) in a predetermined cutting direction (108) and a cutting edge (22) leading in the direction of the Y-axis (104) and one of the leading edge (30). 22) in the direction of the Y-axis (104) trailing edge (32), wherein the cutting edges (22, 32) of a blade (10) or more blades (20, 30) of the blade unit (90) are assigned,
wherein, in the mounted state, the leading cutting edge (22) and the trailing cutting edge (32) each have a different position and / or extent in the direction of the X-axis (102),
wherein the blade unit (90) is reciprocable along the X-axis (102) by means of a spring member (160), and
wherein a contact element (110) for applying to the cut material (300) is provided and the cutting edges (22, 32) of the blade unit (90) with respect to the contact element (110) at least in the cutting operation in the direction of the X-axis (102). The cutting head according to claim 1, wherein the holder (150) is pivotable about the Z-axis (106) during cutting. A cutting head according to claim 1 or 2, wherein the support (150) comprises a slide guide (152) and a slide (154) movable in the direction of the X-axis (102) to which the blade unit (90) is attached. A cutting head according to any one of the preceding claims, wherein a return device (180) is provided which places the support (150) in a central position. Cutting head according to one of the preceding claims, wherein the trailing edge (32) is associated with a leading finger (50) intended to grip under the material to be cut (300). A cutting head according to claim 5, wherein the blade unit (90) has a trailing blade (30) with trailing edge (32) formed in an L-shape with a ridge (40) and a longitudinal leg (42), the trailing edge (32 ) is arranged on the upper leg (40), in particular at the transition to the longitudinal leg (42), and the longitudinal leg (42) forms the leading finger (50), or in that the blade unit (90) has a round blade as a trailing blade (30). A cutting head according to any one of claims 5 to 6, wherein the finger (50) has a blade (56) on its upper surface (54) facing the support (150). A cutting head according to any one of the preceding claims, wherein the blade unit (90) comprises a triangular blade as a leading blade (20). A cutting head according to any one of the preceding claims, wherein the blade unit (90) comprises a blade (10) comprising the leading and trailing blades (22, 32). Cutting machine (200) with a cutting head (100) according to one of the preceding claims, for cutting cutting material (300),
wherein the cutting head (100) has an X-axis (102), a Y-axis (104) and a Z-axis (106), which are each perpendicular to each other, and a contact side (120) in the intended use of the Cutting material (300) faces, and
with a blade unit (90) attached to an at least partially movable support (150)
wherein the blade unit (90) is provided for cutting the material to be cut (300) along a cutting path (306) in a predetermined cutting direction (108) and a cutting edge (22) leading in the direction of the Y-axis (104) and one of the leading edge (30). 22) in the direction of the Y-axis (104) trailing edge (32), wherein the cutting edges (22, 32) of a blade (10) or more blades (20, 30) are assigned,
wherein, in the mounted state, the leading cutting edge (22) and the trailing cutting edge (32) each have a different position and / or extent in the direction of the X-axis (102),
wherein the cutting head (100) is guided along the cutting material (300) in a straight line relative to the material to be cut (300) and the blade unit (90) is reciprocable along the X-axis (102) by means of a spring element (160), and
wherein a contact element (110) for applying to the cut material (300) is provided and the cutting edges (22, 32) of the blade unit (90) with respect to the contact element (110) at least in the cutting operation in the direction of the X-axis (102). The cutting machine of claim 10, wherein the support (150) is pivotable about its Z-axis (106). Cutting machine according to claim 10 or 11, wherein the cutting head (100) is fixed to a robot arm (208), in particular to a robot arm (208) which is movable along six axes. An L-shaped blade (30) for a blade unit (90) of a cutting head (100) according to any one of claims 1 to 9, comprising a thigh (40) and a longitudinal leg (42), wherein a blade (32) is provided on the thigh (40). is arranged, in particular at the transition to the longitudinal leg (42), and the longitudinal leg (42) forms a leading finger (50), wherein the finger (50) on its upper side (54), which is intended to the cutting material (300) faces, a Cutting edge (56). Blade (10) for a blade unit (90) of a cutting head (100) according to any one of claims 1 to 9, wherein a flat member having a leading portion (26) with a leading edge (22) and a trailing portion (36) with a trailing Cutting edge (32) is provided, wherein the trailing portion (36) has a thigh (40) and a longitudinal leg (42) and the cutting edge (22) of the leading portion (26) relative to the thigh (40) and the intended cutting direction ( 108) is inclined towards and points to the longitudinal leg (42), wherein the leading cutting edge (22) is intended for scoring the Schneidguts (300) from above above the Schneidguts (300) is arranged. Blade according to claim 14, wherein the trailing cutting edge (32) is arranged on the upper limb (40), in particular at the transition to the longitudinal limb (42), and the longitudinal limb (42) forms a leading finger (50). Blade according to claim 14 or 15, wherein the longitudinal leg (42) on its upper side (54), which is intended to the cutting material (300) facing, a cutting edge (56).

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