EP3705247B1 - Shearing device and brush manufacturing machine with shearing device and use of a shearing device - Google Patents

Description

The invention relates to a shearing device with a knife and a counter knife assigned to the knife, a brush manufacturing machine with such a shearing device and the use of a shearing device for cutting bristle filaments to length.

When making brushes, it is often necessary to shorten bristle filaments or cut them into shape. In practice, shearing devices with fly knives are often used, particularly when machining brush bodies that have already been bristled. Shearing devices with fly knives are for example from the publications EP 0 994 212 A1 , DE 39 41 738 A1 , DE 195 09 063 A1 and DE 195 28 834 B4 previously known.

Although the use of fly knives has proven itself in principle, it is accompanied by a comparatively high level of noise development, which is perceived as annoying, and can therefore make noise protection measures necessary. Due to the fact that the fly blades move rapidly during operation and also during the setting up of the cutting devices, the user must also be extremely careful in order to avoid injuries. For reasons of occupational safety, it is necessary to define and adhere to safety measures for the operation of the cutting devices and to provide the cutting devices with appropriate protective devices in order to minimize the risk of injury when setting up and operating the cutting devices. The previously known shearing devices thus require a safety-appropriate and comparatively complex construction, including the periphery of the shearing devices, in order to avoid the particular risk associated with the use of Flick knives go hand in hand with sufficient allowance. Particularly when setting up these shearing devices, particular care is required, since the fitter is also working in the working area of the shearing devices in which the fly blades move. This can complicate the handling of the previously known shearing devices.

The object of the invention is therefore to provide a shearing device, a brush manufacturing machine and a use of a shearing device of the type mentioned at the beginning, with which the disadvantages outlined above can be reduced or completely avoided.

To achieve this object, a shearing device with the features of the independent claim directed to such a shearing device is first proposed. In particular, a shearing device with a knife and a counter knife assigned to the knife is proposed to achieve the object, the knife being rotatable around an axis of rotation for generating a cutting movement relative to a counter knife edge of the counter knife and having at least one knife edge coiled around an axis of rotation. As a result of the rotation of the knife about its axis of rotation, the knife edge coiled around the axis of rotation is also moved relative to the counter knife edge of the knife. A relative cutting movement is generated between the knife edge and the counter knife edge, with which bristle filaments, for example, can be shortened. With the proposed cutting concept of the shearing device, striking knives with which bristle filaments are literally chopped off are avoided. The shearing device according to the invention enables a continuous and fluid cutting movement, which not only leads to better cutting results, but also to a higher one Occupational safety can lead to the operation of the cutting device.

The at least one coiled knife edge preferably wraps around the axis of rotation of the knife at least once, preferably several times, completely. This favors the greatest possible length of the knife edge and can contribute to a fine, precise cut.

The shearing device can meet particularly high safety requirements with a particularly high quality cutting pattern at the same time if the knife edge and the counter knife edge of the shearing device are spaced between 0 mm and 0.5 mm, preferably between 0 mm and 0.1 mm. In this way, the distance between the knife edge and the counter knife edge is in any case so small that it is impossible to accidentally get between the knife edge and the counter knife edge with your fingers. In this way, the risk of injury when using the shearing device can be significantly reduced and, above all, serious injuries that can occur when using fly knives can be avoided.

A distance between the knife edge and the counter knife edge can also remain constant when the shearing device is in operation. It is also possible for a distance between the axis of rotation and the counter knife to remain constant when the shearing device is in operation. The cutting movement is generated by the rotation of the at least one coiled knife edge around the axis of rotation of the knife, without the need to change a distance between the knife and the counter knife.

The knife and the counter knife can thus preferably a constant distance between 0 mm and 0.5 mm, particularly preferably between 0 mm and 0.1 mm, to one another. The distance between the knife and the counter knife of the shearing device can be kept constant to one another at least during a cut. Thus, there is a cutting gap between the knife and the counter knife which is so small that even an intentional grip by a user between the knife and the counter knife can be effectively prevented. This can considerably reduce the risk of injury when the shearing device is in operation.

In one embodiment of the shearing device, it is provided that the counter knife edge has a main direction of extension which is transverse to the main direction of extension of the at least one coiled knife edge. It can also be provided here that the counter knife edge has a main direction of extent which is oriented in the direction of the axis of rotation or even parallel to the axis of rotation of the knife.

In order to be able to cut comparatively fine bristle filaments reliably and as precisely as possible when working with brushes, the counter knife edge of the counter knife is, according to the invention, a notched counter knife edge provided with cutting notches. The bristle filaments of a brush to be processed with the shearing device can be reliably held within the cutting notches of the counter knife and can be severed by an interaction between the at least one coiled knife edge, which rotates during operation of the shearing device, and the counter knife edge. This without the bristle filaments being displaced too far by the rotating and coiled knife edge at least before the cut is made.

The knife can have a cylindrical base body. The at least one coiled knife edge can be arranged and / or formed on this cylindrical base body. In a particularly preferred embodiment of the shearing device, the knife has two or three or four or more coiled knife edges. The shearing device thus provides a knife that has several coiled circumferential knife edges and thus has a comparatively large cumulative edge length. This can increase the service life of the knife, so that replacement of the knife or regrinding of the knife has to take place less frequently than the knives of previously used shearing devices.

The shearing device can have a suction device. With the aid of the suction device, cutting waste arising during operation of the shearing device can be sucked off directly from the working area of the shearing device. This can promote a higher manufacturing quality and can also reduce the development of dust and / or dirt in the working area of the shearing device.

In one embodiment, the shearing device has a suction housing that at least partially houses the knife rotating about its axis of rotation when the shearing device is in operation. With the help of the rotary movement of the knife, the cutting waste can be moved into the interior of the suction housing and extracted from there using the suction device already mentioned above. The use of the suction housing can further reduce the development of dirt during operation of the shearing device.

In one embodiment of the shearing device, the counter knife is with its counter knife edge on a, arranged and / or formed, for example, on the suction housing already mentioned above. In this way, the suction housing of the suction device is assigned a double function, whereby the shearing device can ultimately be given a particularly compact shape.

The aforementioned cutting notches of the counter knife can be symmetrical and / or asymmetrical cutting notches.

The counter knife can have cutting notches which have an acute opening angle. With such cutting notches it is possible to avoid evasive movements occurring during the operation of the shearing device, in particular of bristle filaments which are to be shortened with the shearing device. If the counter knife has cutting notches which have an obtuse opening angle, it may be easier to introduce bristle filaments into the cutting notches of the counter knife and to fix them reliably there for the cutting operation.

In one embodiment of the shearing device, cutting notches of the counter knife have cutting edges which are shorter than the opposite edges assigned to the cutting edges and / or which have a greater pitch than the respective opposite edges assigned to the cutting edges. In particular, if the cutting edges of the cutting notches have a greater pitch than the mating edges assigned to the cutting edges, the cutting edges of the cutting notches can form a reliable abutment for cut material, in particular for bristle filaments, which is gripped by the rotating at least one coiled knife edge of the knife and with the cutting loaded by a cutting force. Similar to a pair of scissors, the bristle filaments can be severed particularly precisely with the aid of the counter-knife edge that interacts with the at least one coiled knife edge.

In one embodiment of the shearing device, cutting notches of the counter knife can have a notch depth of between 0.1 mm and 10 mm. The optimal notch depth can be selected depending on the material to be cut. For particularly fine material to be cut, for example for particularly fine bristle filaments from toothbrushes, it can be advantageous to choose a small notch depth. For thicker cut material, for example for bristles for the production of brooms, it can be advantageous to provide cutting notches which have a greater notch depth.

The at least one coiled knife edge can have a helix angle between 0.1 degrees and 45 degrees. The smaller the angle of inclination of the at least one coiled knife edge, the greater the length of the knife edge can be, which can ultimately increase the service life of the knife edge. In addition, a smaller angle of inclination of the at least one coiled knife edge can promote a gentle cut.

To produce profiled cuts or profiled cut surfaces, in particular when processing bristle fields of brushes, such as toothbrushes, it can be advantageous if the counter knife edge is a profiled counter knife edge. It is possible, for example, for the counter knife edge to have a wave profile. The counter knife edge can be profiled, for example, convex or concave or convex-concave, if necessary. Just like the counter knife edge, the at least one coiled knife edge can also be a profiled knife edge. The at least one coiled knife edge can have a wave profile and / or be convex, concave or convex-concave. A profiled, coiled knife edge can be one of their imaginary Envelope has a corresponding profile. It is thus possible that an envelope of a profiled, coiled knife edge has a convex, concave and convex-concave profile and / or is provided with a wave profile.

The knife edges can be designed without interruption. In principle, however, it is possible for the knife edges to have notches and / or serrations and / or recesses. This can favorably influence the cutting behavior of the shearing device as a function of the material to be cut.

The counter knife edge can have a wedge angle between 45 degrees and 90 degrees, in particular between 85 degrees and 90 degrees. The wedge angle of the counter knife edge can be understood to mean the angle that is spanned between the counter knife edge and a longitudinal plane of the counter knife. The longitudinal plane of the counter knife can be aligned parallel to the axis of rotation of the knife. In the case of a counter knife with cutting notches, these can have a wedge angle between 45 degrees and 90 degrees, in particular between 85 degrees and 90 degrees.

In one embodiment of the shearing device, the at least one coiled knife edge has a wedge angle between 10 degrees and 90 degrees.

In one embodiment of the shearing device, the at least one coiled knife edge has a clearance angle between 1 degree and 30 degrees. In one embodiment of the shearing device, the counter knife can have an acute or an obtuse bevel angle. The bevel angle of the counter knife can be an angle that is spanned between a bevel adjoining the counter knife edge and a longitudinal plane of the counter knife. The longitudinal plane of the counter knife can be aligned parallel to the axis of rotation of the knife. The bevel angle of the counter knife can be between 5 degrees and 45 degrees or, for example, between 45 degrees and 120 degrees.

In one embodiment of the shearing device, a wedge angle of the counter knife edge is greater than or equal to a bevel angle of the counter knife that is spanned between a bevel adjoining the counter knife and a longitudinal plane of the knife. In a particularly advantageous embodiment of the shearing device, the at least one coiled knife edge is arranged on a web that is coiled around the axis of rotation of the knife. This web can have a web width of 0.3 mm to 5 mm and / or a web height of 1 mm to 20 mm. Free spaces that can arise between adjacent sections of the coiled circumferential web on the knife can be used for receiving and removing cut waste. In this way, the cutting waste produced when the shearing device is used can be picked up by the knife rotating about its axis of rotation and transported, for example, in the direction of the suction device already mentioned above.

All embodiments of the shearing device according to the invention are distinguished by a comparatively low level of dirt development. While with beating knives, as they are already known from practice, when processing bristle filaments, the cutting waste can be shot away by the impulse of the fly knife at comparatively high speeds and possibly impair production in other areas, this is due to the shearing device according to the invention other cutting principle prevented. The speed with which at least one turned The knife edge is moved past the counter knife edge in the direction of the axis of rotation, can be significantly smaller. The cut part of a bristle filament, for example, receives a significantly smaller impulse from the impact of the knife edge of the shearing device, so that it is not shot out of the cutting area of the shearing device, or not too far. In interaction with the suction device already mentioned above, it can be effectively prevented that the cutting waste that occurs when the shearing device is used gets out of the cutting area of the knife.

The knife can have a transition surface parallel to the axis of rotation of the knife between the at least one coiled knife edge and a free surface of the knife edge. The free surface can have a measurable width in the direction of the axis of rotation between 0.001 mm and 0.3 mm. This can simplify regrinding the knife.

In one embodiment of the shearing device, cutting notches of the counter knife have a direction which is oriented at right angles or obliquely to a main direction of extension of the counter knife edge. The direction of extension of the cutting notches of the counter knife can be oriented, for example, at an angle between 10 degrees and 80 degrees to the main direction of extension of the counter knife edge.

The shearing device can have a holder for a workpiece, in particular a holder for a brush, preferably for a round brush and / or for a toothbrush.

In one embodiment of the shearing device, it has a multi-axis robot for handling a workpiece and / or for feeding and / or handling the workpiece on the knife. With a suitably programmed multi-axis robot, free-form machining of a workpiece can be carried out on the shearing device. In this way, brushes with particularly complex bristle field geometries can be produced.

In one embodiment of the shearing device, it has a multi-axis robot on which the knife and / or the counter knife are arranged. In this way, the knife and / or the counter knife can be moved relative to a, preferably fixed, workpiece in order to carry out the previously mentioned free-form machining of the workpiece.

In order to process bristle brushes, the shearing device can have a bristle displacement device. With the aid of such a bristle displacement device, individual bristles, individual bristle bundles or groups of bristle bundles can be displaced so that they are not caught by the knife and counter knife of the shearing device. In this way, complex bristle field geometries can also be generated with the aid of the shearing device. Different groups of bristle filaments or bristle bundles can be shortened to different lengths. To do this, the bristle filaments are gradually processed. Such bristle filaments, which are initially not to be shortened or to be shortened to a different length, can be displaced out of the effective area of the shearing device with the aid of the bristle displacement device.

To achieve the object, finally, a brush manufacturing machine is also proposed which has the means and features of the independent claim directed to such a claim. To solve the problem is thus with a A brush manufacturing machine of the type mentioned at the outset is proposed to equip it with a shearing device according to one of the claims directed to a shearing device.

Finally, in order to achieve the object, the use of a shearing device according to one of the claims directed to a shearing device for cutting bristle filaments to length is proposed.

• Fig. 1 eine Seitenansicht einer ersten Ausführungsform einer erfindungsgemäßen Abschervorrichtung zur Bearbeitung eingedrehter Bürsten,
• Fig. 2 eine perspektivische Ansicht der in Fig. 1 gezeigten Abschervorrichtung,
• Fig. 3 eine perspektivische Ansicht eines Messers mit insgesamt vier um seine Rotationsachse gewendelt umlaufenden Messerschneiden sowie eines dem Messer zugeordneten Gegenmessers mit gekerbter Gegenmesserschneide,
• Fig. 4 eine Seitenansicht des in Fig. 3 gezeigten Messers mit seinem Gegenmesser,
• Fig. 5 die in Figur 4 mit dem Kreis V markierte Einzelheit in vergrößerter Darstellung,
• Fig. 6 eine perspektivische Ansicht des in den Fig. 3 und 4 dargestellten Gegenmessers,
• Fig. 7-10 unterschiedliche Ansichten einer weiteren Ausführungsform eines Gegenmessers,
• Fig. 11 eine perspektivische Ansicht eines profilierten Messers mit einem diesem zugeordneten profilierten Gegenmesser,
• Fig. 12-14 unterschiedliche Ansichten des in Fig. 11 dargestellten profilierten Messers und des in Fig. 1 dargestellten profilierten Gegenmessers,
• Fig. 15-34 unterschiedliche Varianten von Messern und Gegenmessern in zum Teil vergrößerter Darstellung,
• Fig. 35 eine weitere perspektivische Ansicht einer Ausführungsform einer Abschervorrichtung, wobei diese mit einem Bürstenhalter für eine zu bearbeitende Bürste ausgestattet ist,
• Fig. 36 die in Fig. 35 gezeigte Abschervorrichtung mit profiliertem Messer und profiliertem Gegenmesser,
• Fig. 37 die in Fig. 36 gezeigte Abschervorrichtung mit einer Verdrängervorrichtung für Borstenfilamente im Eingriff an einer an dem Halter aufgespannten Bürste,
• Fig. 38 eine weitere Ausführungsform einer Abschervorrichtung mit einem konvex profilierten Messer, einem konvex profiliertem Gegenmesser sowie mit einem Mehrachsroboter als Handhabungsvorrichtung zur Handhabung von Werkstücken, hier von Bürsten,
• Fig. 39 eine perspektivische Einzeldarstellung des Messers und des Gegenmessers der in Fig. 38 abgebildeten Abschervorrichtung,
• Fig. 40 eine perspektivische Darstellung einer Bürstenherstellungsmaschine, die mit einer Abschervorrichtung ausgestattet ist, sowie
• Fig. 41 eine Einzelteildarstellung der in Fig. 40 am Ende eines Roboterarms aufgehängten Abschervorrichtung.

The invention is described in more detail below on the basis of several exemplary embodiments. However, the invention is not restricted to these exemplary embodiments. Further exemplary embodiments result from the combination of the features of individual or several protection claims with one another and / or in combination of individual or several features of the exemplary embodiments. They show in partly highly schematic representation:

• Fig. 1 a side view of a first embodiment of a shearing device according to the invention for processing screwed-in brushes,
• Fig. 2 a perspective view of the in Fig. 1 shown cutting device,
• Fig. 3 a perspective view of a knife with a total of four knife edges coiled around its axis of rotation as well as a counter knife assigned to the knife with a notched counter knife edge,
• Fig. 4 a side view of the in Fig. 3 shown knife with his counter knife,
• Fig. 5 in the Figure 4 with the circle V marked detail in an enlarged view,
• Fig. 6 a perspective view of the in FIG Figs. 3 and 4 shown counter knife,
• Fig. 7-10 different views of a further embodiment of a counter knife,
• Fig. 11 a perspective view of a profiled knife with a profiled counter knife assigned to it,
• Fig. 12-14 different views of the in Fig. 11 profiled knife shown and the in Fig. 1 profiled counter knife shown,
• Figures 15-34 different variants of knives and counter knives in partly enlarged view,
• Fig. 35 a further perspective view of an embodiment of a shearing device, this being equipped with a brush holder for a brush to be processed,
• Fig. 36 in the Fig. 35 Shear device shown with profiled knife and profiled counter knife,
• Fig. 37 in the Fig. 36 Shear device shown with a displacement device for bristle filaments in engagement with a brush clamped on the holder,
• Fig. 38 a further embodiment of a shearing device with a convex profiled knife, a convex profiled counter knife and with a multi-axis robot as a handling device for handling Work pieces, here from brushes,
• Fig. 39 a perspective individual representation of the knife and the counter knife of the in Fig. 38 shown shearing device,
• Fig. 40 a perspective view of a brush manufacturing machine equipped with a shearing device, and
• Fig. 41 a detailed illustration of the in Fig. 40 shear device suspended at the end of a robot arm.

In the following description of various embodiments of the invention, elements that correspond in their function are given the same reference numerals even if they have a different design or shape.

All the figures show components of different embodiments of shearing devices designated as a whole by 1. Unless otherwise indicated, the following description relates to all embodiments of the shearing devices 1.

The shearing device 1 has a knife 2 and a counter knife 3 assigned to the knife 2. The knife 2 can be rotated about an axis of rotation R relative to a counter knife edge 4 of the counter knife 3 in order to generate a cutting movement. The knife 2 of the shearing devices 1 shown in the figures has a total of four knife edges 5 coiled around its axis of rotation R. It can be clearly seen that each coiled knife edge 5 completely wraps around the axis of rotation R of the knife 2 several times.

Based on Figures 3 , 7th and 11 it becomes clear that the knife 2 and the counter knife 3, if at all, have a very small distance from one another in the position of use. The cutting principle according to which the shearing device 1 works makes it unnecessary to change the distance between the knife 2 and the counter knife 3 for cutting. A distance previously set between the knife 2 and the counter knife 3 is kept constant during the operation of the shearing device 1. Depending on the material to be cut, the distance can be between 0 mm and 0.5 mm, particularly preferably between 0 mm and 0.1 mm. A distance between 0 mm and 0.1 mm is particularly suitable for processing bristle filaments of brushes with the shearing device 1, for example.

The Figures 6 , 10 and 14th illustrate that the counter knife edge 4 has a main direction of extent which is oriented transversely to a longitudinal axis of the counter knife 3. The Figures 4 , 8th and 12th show that the counter knife edge 4 has a main direction of extent PF.1, which is also transverse to the main direction of extension of the four coiled knife edges 5 of the knife 2. It can also be seen that the main direction of extent PF.1 of the counter knife edge 4 of the respective counter knife 3 is also oriented in the direction of the axis of rotation R or even parallel to the axis of rotation R of the knife 2.

All of the counter knives 3 shown in the figures are counter knives 3, the counter knife edge 4 of which is a notched counter knife edge provided with cutting notches 6.

With the aid of the cutting notches 6 of the counter knife edge 4, bristle filaments 7 of brushes 8 to be processed can be held on the counter knife 3. Due to the knife blades 5 rotating about the axis of rotation R, the bristle filaments 7 located in the cutting notches 6 can then close machining brushes 8 are reliably severed without the bristle filaments 7 being able to move too far when the rotating knife edges 5 move on cutting edges 9 of the cutting notches 6 in their cutting movement caused by the rotation about the axis of rotation R of the knife 2.

The Figures 3 , 7th and 11 also show that the knife 2 has a cylindrical base body 10. Four coiled knife edges 5 are formed on this cylindrical base body 10.

The ones in the Figures 1, 2 , 35 and the shearing devices shown in 40 and 41 are each provided with a suction device 11. The suction device 11 is assigned to the knife 2 of the shearing device 1. The suction devices 11 are provided with suction housings 12 which at least partially house the knives 2. The suction housings 12 surround the knives 2 rotatably mounted in them over an angular range between 180 and 270 degrees. As a result of the rotation of the respective knife 2 about its axis of rotation R, separated pieces of bristle filament are conveyed into the interior of the respective suction housing 12 and finally sucked off with the aid of the suction device 11. In this way, contamination of the working area of the shearing device 1 by cutting waste can be reliably avoided.

In the embodiment of a shearing device 1 shown in FIGS Figures 40 and 41 is shown, the counter knife 3 is arranged or formed on the suction housing 12. In this way, the shearing device 1 is given a particularly compact shape with little space requirement. In embodiments of the shearing device not shown in the figures, the counter knife 3 is provided with symmetrical cutting notches.

All of the counter knives 3 shown in the figures have asymmetrical cutting notches 6. This is due to the fact that the cutting edges 9 of the cutting notches 6 have a greater slope or are steeper than the mating edges 13 respectively assigned to the cutting edges 9.

The enlarged detailed views of the counter knife 3 (see Figures 5 , 9 , 13th , 16, 18, 20 , 22, 24, 26 , 28, 30, 32 and 34 ) show differently designed cutting notches 6. Some of these cutting notches 6 have an acute opening angle, while other cutting notches 6 in comparison have more obtuse opening angles. In all of the counter knives 3 it is provided that the cutting notches 6 have cutting edges 9 which are shorter than the counter edges 13 assigned to the cutting edges 9. In addition, as already mentioned above, the cutting edges 9 also have a greater pitch than the mating edges 13 assigned to them.

The in Figure 5 The enlarged embodiment of the counter knife 3, the cutting edges 9 of the cutting notches 6 are at an angle of slightly less than 90 degrees to a main direction of extent PF. 1 of the counter knife edge 4 oriented. The angle that is spanned between the respective cutting edge 9 in the main direction of extent of the counter knife edge 4 is preferably between 45 degrees and 90 degrees.

The mating edges 13 assigned to the cutting edges 9 close with the main direction of extent PF. 1 of the counter knife edge 4, which in the position of use of the counter knife 3 is aligned parallel to an axis of rotation R of the knife 2, forms an angle between 30 degrees and 80 degrees, are accordingly provided with a smaller slope than the cutting edges 9.

The cutting notches 6 of the counter knife 3 shown in the figures have a notch depth between 0.1 mm and 10 mm. The notch depths can be selected depending on the material that is to be cut with the aid of the shearing device 1.

The coiled knife edges 5 of the knives 2 shown in the figures have an angle of inclination which, depending on the application, can be between 0.1 degrees and 45 degrees.

The Figures 11 to 14 and 36 to 41 show counter-knife 3, the counter-knife edges 4 of which are profiled counter-knife edges. The ones in the Figures 11 to 14 Counter knife cutting edges 4 shown are convex-concave profiled or curved counter knife cutting edges 4, which thus have a wave profile. The ones in the Figures 38 to 41 The counter knife cutting edges 4 shown have a semicircular profile, that is to say they are concave profiled counter knife cutting edges 4.

The knife edges 5 of the knives 2 are profiled to correspond to the profile of the counter knife edges 4 assigned to them. Accordingly, it is in the Figures 11 to 13 Knife 2 shown equipped with convex-concave profiled knife edges 5. That in the Figures 38 to 41 The knife 2 shown has knife edges 5 running helically along a convex line. The knives 2 with profiled knife edges 5 have imaginary envelopes, which in turn are correspondingly profiled. In the context of the described shearing devices 1, a profiled knife edge 5 can be understood to mean a knife edge 5 around which an imaginary envelope can be placed, which in turn has a corresponding concave, convex and / or convex-concave and / or corrugated profile.

The knife edges 5 shown in the figures are designed without interruption. In principle, however, it is possible to provide the knife edges 5 with notches or serrations or recesses. This can favorably influence the cutting behavior of the shearing device 1 as a function of the material to be cut.

The counter knife edge 4 and in particular the cutting notches 6 of the counter knife edge 4 of the counter knife 3 shown in the figures have a wedge angle between 45 degrees and 90 degrees, in particular between 85 degrees and 90 degrees. The wedge angle can be understood to mean the angle that is spanned between the counter knife edge 4 and an imaginary longitudinal plane of the counter knife 3.
The coiled knife edges 5 have wedge angles between 10 degrees and 90 degrees.

The coiled knife edges 5 also have clearance angles between 1 degree and 30 degrees. The counter knife 3 can have an acute or an obtuse bevel angle, the bevel angle being the angle that is spanned between a bevel 14 adjoining the counter knife edge 4 and an imaginary longitudinal plane of the counter knife 3. The bevel angle of the counter knife 3 can be between 5 degrees and 45 degrees or between 45 degrees and 120 degrees.

A wedge angle of the counter knife edge 4, in particular wedge angle of the cutting notches 6 of the counter knife edge 4, are in the Figures 14 , 18th , 20th , 22, 24 and 26 The counter knife 3 shown is larger than a bevel angle of the respective counter knife 3, which is spanned between the bevel 14 adjoining the counter knife edge 4 and the previously mentioned longitudinal plane of the counter knife 3. At this point it should be mentioned that the longitudinal plane in the figures Counter knife 3 shown is parallel to a planar front side 15 of counter knife 3.

The coiled knife edges 5 of the knives 2 of the shearing devices 1 shown in the figures are each arranged on a web 16 which is coiled around the respective axis of rotation R of the knife 2. The webs 16 have a web width between 0.3 mm and 5 mm and a web height of 1 mm to 20 mm and can be produced, for example, by milling the base body 10.

That in the Figures 25 and 26 The knife 2 shown has between its coiled knife edges 5 and a respective free face 17 of the respective knife edge 5 a transition surface 18 parallel to the axis of rotation R of the knife 2. This transition surface 18 has a measurable width between 0.001 mm and 0 in the direction of the axis of rotation R of the knife 2, 3 mm and serves to simplify the regrinding of the knife 2 and its coiled knife edges 5.

In the Figures 3 to 16 As well as 27, 28 and 38 to 41, the cutting notches 6 of the respective counter knives 3 shown have a direction which is oriented at right angles to the main direction of extent PF.1 of the counter knife blade 4 and also at right angles to the axis of rotation R of the respective knife 2 of the shown cutting device 1.

The other counter-knife 3 have cutting notches 6, the direction of which is oriented obliquely to a main direction of extension of the counter-knife edge 4 and also obliquely to the axis of rotation R of the knife 2 when the counter-knife 3 is in its position of use on the shearing device 1. The orientation of the directions of the cutting notches 6 can be between 10 degrees and 80 degrees. The result of these obliquely aligned cutting notches 6 are relatively small wedge angles at the cutting edges 9 of the cutting notches 6, which can ultimately promote a finer cut.

Each shearing device 1 shown in the figures also has a holder 19 for a workpiece, here a brush 8. In the case of the Figures 1 and 2 Shear device 1 shown, this holder 19 is a pivotably mounted holder 19, matched to a round brush, which is also set up to set the round brush 7 clamped on it in rotation for processing on the shear device 1.

The ones in the Figures 35 to 37 The shearing device 1 shown has a holder 19 which is designed to hold a toothbrush. In addition, the holder 19 can be moved here in three different axes relative to the knife 2 and the counter knife 3 in order to feed the bristle filaments 7 of the brush clamped on the holder 19 to the knife 2 and the counter knife 3.

In the Figure 38 The shearing device 1 shown has a multi-axis robot 20 for handling the brush, more generally speaking the workpiece 8. With the help of this multi-axis robot 20, on which a holder 19 for the brush 8 is arranged, the brush 8 can be fed to the knife 2 and the counter knife 3 of the shearing device 1 for processing and the brush 8 can also be handled.

The shearing device 1 according to Figure 40 has a multi-axis robot 20 on which both the knife 2 and the counter knife 3 of the shearing device 1 are arranged. In the Figure 37 The shearing device 1 shown has a bristle displacement device 21. With the help of the bristle displacement device 21, bristle filaments 7 can be displaced A brush clamped on the holder 19 of the shearing device 1 can be displaced laterally in order to be able to process individual bristle filaments 7 or groups of bristle filaments 7 separately from the other bristle filaments 7 of the brush 8.

Figure 40 Finally, FIG. 2 shows a brush manufacturing machine, designated as a whole by 22, which is equipped with a shearing device 1. The brush manufacturing machine 22 has a control unit 23 with which functional units of the brush manufacturing machine 22, such as a rotary indexing table 24 and of course also the shearing device 1 and above all the multi-axis robot 20, can be controlled. A vacuum source 25 of the suction device 11 already mentioned and described in detail can be seen adjacent to the control unit 23. Not shown here is a connecting hose via which the suction housing 12 of the suction device 11, which is arranged on the multi-axis robot 20, is connected to the vacuum source 25 of the suction device 11.

An input station 26 and a removal station 27 of the brush manufacturing machine 22 are assigned to the rotary indexing table 24. Processed brushes 8 can be removed from the rotary indexing table 24 of the brush manufacturing machine 22 via the removal station 27. Unprocessed brushes 8 are fed via input station 26 to rotary indexing table 24 and via this to shearing device 1 for processing the bristle filaments 7 of brushes 8.

The shearing device 1 shown in the figures is therefore suitable for cutting bristle filaments 7 to length when processing and manufacturing brushes 8.

The invention is concerned with improvements in the technical field of shear devices. This is done under among other things, the shearing device 1 is proposed, which has a knife 2 with at least one knife edge 5 which is coiled and rotatable about an axis of rotation R of the knife 2. The knife edge 5 is assigned a counter knife edge 4 of a counter knife 3. The shearing movements, by means of which, for example, bristle filaments 7 of brushes 8 to be processed can be cut to length, are generated by the relative rotational movement of the at least one coiled knife edge 5 to the preferably stationary counter knife edge 4 of counter knife 3. Since the knife 2 and the counter knife 3 can keep their distance from one another constant during the operation of the shearing device 1, the shearing device 1 is characterized by a comparatively low risk of injury when it is in use.

List of reference symbols

1

Shear device

2

knife

3

Counter knife

4th

Counter knife edge

5

Knife edge

6th

Cutting notch

7th

Bristle filament

8th

brush

9

Cutting edge in 6

10

Base body of 2

11

Suction device

12th

Suction housing

13th

Opposite edge in 6

14th

Bevel on 3

15th

Front of 3

16

Bridge at 2

17th

Open space on 2

18th

Transition area on 2

19th

holder

20th

Multi-axis robot

21

Bristle displacement device

22nd

Brush making machine

23

Control unit

24

Rotary tactical

25th

Vacuum source from 11

26th

Input station

27

Removal station

Claims (25)

1. Shearing device (1) having a blade (2) and having a counterpart blade (3) assigned to the blade (2), wherein the blade (2), in order to generate a cutting movement relative to a counterpart blade cutting edge (4) of the counterpart blade (3), is rotatable about an axis of rotation (R) and has at least one blade cutting edge (5) which is helically coiled about its axis of rotation (R), characterized in that the counterpart blade cutting edge (4) is a notched counterpart blade cutting edge provided with cutting notches (6).
2. Shearing device (1) according to Claim 1, wherein the at least one helically coiled blade cutting edge (5) runs all the way around the axis of rotation (R) of the blade (2) at least once, preferably multiple times, and/or wherein the blade (2) and the counterpart blade (3) have a spacing of between 0 mm and 0.5 mm, preferably between 0 mm and 0.1 mm, to one another, and/or wherein a spacing between the blade (2) and the counterpart blade (3) is constant during the operation of the shearing device (1).
3. Shearing device (1) according to Claim 1 or 2, wherein the counterpart blade cutting edge (4) has a main extent direction which is oriented transversely with respect to the main extent direction of the at least one helically coiled blade cutting edge (5) and/or in the direction of the axis of rotation (R) or parallel to the axis of rotation (R) of the blade (2).
4. Shearing device (1) according to any of the preceding claims, wherein the blade (2) has a cylindrical main body (10), on which the at least one helically coiled blade cutting edge (5) is arranged and/or formed, and/or wherein the blade has two or three or four or more helically coiled blade cutting edges (5).
5. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a suction extraction device (11), in particular wherein the suction extraction device (11) is assigned to the blade (2).
6. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a suction extraction housing (12) which at least partially houses the blade (2).
7. Shearing device (1) according to any of the preceding claims, wherein the counterpart blade (3) is arranged and/or formed on the suction extraction housing (12).
8. Shearing device (1) according to any of the preceding claims, wherein the counterpart blade (3) has symmetrical and/or asymmetrical cutting notches (6).
9. Shearing device (1) according to any of the preceding claims, wherein the counterpart blade (3) has cutting notches (6) which have an acute opening angle, and/or that the counterpart blade (3) has cutting notches (6) which have an obtuse opening angle.
10. Shearing device (1) according to any of the preceding claims, wherein cutting notches (6) of the counterpart blade (3) have cutting edges (9) which are shorter than counterpart edges (13) assigned to the cutting edges (9) and/or which have a steeper gradient than counterpart edges (13) assigned to the cutting edges (9).
11. Shearing device (1) according to any of the preceding claims, wherein cutting notches (6) of the counterpart blade (3) have a notch depth between 0.1 mm and 10 mm.
12. Shearing device (1) according to any of the preceding claims, wherein the at least one helically coiled blade cutting edge (5) has a gradient angle between 0.1° and 45°.
13. Shearing device (1) according to any of the preceding claims, wherein the counterpart blade cutting edge (4) is a profiled counterpart blade cutting edge, in particular wherein the counterpart blade cutting edge (4) has an undulating profile and/or is of convex or concave or convex-concave profile, and/or wherein the at least one helically coiled blade cutting edge (5) is a profiled blade cutting edge, in particular wherein the at least one helically coiled blade cutting edge (5) has an undulating profile and/or is of convex or concave or convex-concave profile, and/or wherein an imaginary envelope of the blade (4) has an undulating profile and/or is of convex or concave or convex-concave profile.
14. Shearing device (1) according to any of the preceding claims, wherein the counterpart blade cutting edge (4), in particular the cutting notches (6) thereof, has/have a wedge angle of between 45° and 90°, in particular between 85° and 90°, and/or that the at least one helically coiled blade cutting edge (5) has a wedge angle of between 10° and 90°.
15. Shearing device (1) according to any of the preceding claims, wherein the at least one helically coiled blade cutting edge (5) has a clearance angle of between 1° and 30°, and/or that the counterpart blade (3) has an acute or an obtuse bevel angle which is enclosed between a bevel (14) adjoining the counterpart blade cutting edge (4) and a longitudinal plane of the counterpart blade (3), in particular a bevel angle between 5° and 45° or a bevel angle between 45° and 120°.
16. Shearing device (1) according to any of the preceding claims, wherein a wedge angle of the counterpart blade cutting edge (4), in particular wedge angle of the cutting notches (6), is greater than or equal to a bevel angle of the counterpart blade (3) which is enclosed between a bevel (14) adjoining the counterpart blade cutting edge (4) and a longitudinal plane of the counterpart blade (3) .
17. Shearing device (1) according to any of the preceding claims, wherein the at least one helically coiled blade cutting edge (5) is arranged on a web (16) which runs in helically coiled fashion around the axis of rotation (R) of the blade (2), in particular wherein the web (16) has a web width of 0.3 mm to 5 mm and/or a web height of 1 mm to 20 mm.
18. Shearing device (1) according to any of the preceding claims, wherein the blade (2) has, between the at least one helically coiled blade cutting edge (5) and a flank (17) of the blade cutting edge (5), a transition surface (18) which is preferably parallel to the axis of rotation (R) of the blade (2) and which has a width, measurable in the direction of the axis of rotation (R), of between 0.001 mm and 0.3 mm.
19. Shearing device (1) according to any of the preceding claims, wherein cutting notches (6) of the counterpart blade (3) have a profile direction which is oriented at right angles or obliquely with respect to a main extent direction of the counterpart blade blade cutting edge (4), in particular at an angle of between 10° and 80°.
20. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a holder (19) for a workpiece (8), in particular a holder (19) for a brush, preferably for a round brush and/or for a toothbrush.
21. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a multi-axis robot (20) for the handling of a workpiece (8) and/or for the feed and/or manipulation of the workpiece (8) at the blade (2) .
22. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a multi-axis robot (20) on which the blade (2) and/or the counterpart blade (3) are arranged.
23. Shearing device (1) according to any of the preceding claims, wherein the shearing device (1) has a bristle displacement device (21).
24. Brush production machine (22) having a shearing device (1) according to any of the preceding claims.
25. Use of a shearing device (1) according to any of the preceding claims for cutting bristle filaments (7) to length.

Images