EP2489484B1 - Method for assembling a blade to a cylinder body and cutting device - Google Patents

Description

1. a) Das Messer, das einen Fußschenkel und einen unter einem Winkel hierzu angeordneten Schneidenschenkel mit einer dem Fußschenkel abgewandten Schneidenkante aufweist, wird mit dem Fußschenkel auf der äußeren Mantelfläche des Zylinderkörpers angeordnet.
2. b) Das Messer wird mit Hilfe von mindestens einem Zugelement, das in kraftübertragender Weise jeweils in einem Spannabschnitt mit dem Messer verbunden ist, in Richtung der Längsachse des Zylinderkörpers gespannt, indem sich sowohl das mindestens eine Zugelement als auch ein jeder Endabschnitt des Messers, der kein Zugelement aufweist, an jeweils einer Verankerungsstelle abstützt und mindestens das eine Zugelement mit einer in Richtung der Schraubenlinie an einem Ende des Messers wirkenden Kraft beaufschlagt wird, wodurch das Messer mit einer Kontaktfläche des Fußschenkels gegen die äußere Mantelfläche des Zylinderkörpers gepresst wird.
3. c) Das Messer wird mittels Schrauben, die den Fußschenkel durchdringen, an dem Zylinderkörper befestigt.

The invention relates to a method for assembling a knife describing a helix on an outer circumferential surface of a cylinder body having a longitudinal axis with the following method steps:

1. a) The knife, which has a leg of the foot and a cutting edge arranged at an angle thereto with a cutting edge facing away from the leg of the foot, is arranged with the foot leg on the outer lateral surface of the cylinder body.
2. b) The knife is tensioned in the direction of the longitudinal axis of the cylinder body by means of at least one tension element, which is connected in a force-transmitting manner in each case in a clamping section in the direction of the longitudinal axis of the cylinder body by both the at least one tension element and each end portion of the knife, the has no tension element, supported at one anchoring point and at least one tension element is acted upon by a force acting in the direction of the helix at one end of the blade force, whereby the blade is pressed with a contact surface of the Fußschenkels against the outer surface of the cylinder body.
3. c) The knife is fastened to the cylinder body by means of screws which penetrate the leg of the foot.

Furthermore, the invention relates to a cutting device for cutting textile goods, textile fibers or leather goods comprising a cylinder body having a longitudinal axis and an outer lateral surface and two projecting at both ends of the cylinder body and coaxially aligned with the longitudinal axis bearing pin or bearing bores and at least one knife in the form of a helix , with a longitudinal axis and a leg of the foot and a cutting leg arranged at an angle thereto with a cutting edge facing away from the leg of the foot, wherein the knife is pressed onto the cylinder body, whereby it is connected in a non-positive manner selbigem.

Such methods and cutting device are known by the company Heusch.

State of the art

Methods for mounting helical knives on cylindrical bodies are well known in the art. Especially in the field of shearing and folding (leather processing) cutting devices comprising a cylinder body and one or a plurality of mounted thereon knife of the aforementioned type are used.

When mounting helical knives on a cylinder body, it is particularly important that each knife is firmly connected to the cylinder body. Only in this way can an optimal cutting result and a high level of safety during a cutting process be guaranteed. According to known methods, for this purpose, separate from the cylinder body usually made of each one L-shaped steel profile knife loose, that is raised with a certain radial play on a cylinder body. Previously, the knives are provided at their two ends in the production with separately manufactured tension elements, which are typically referred to in the industry as "Pletten". These can be used to draw the respective knife in the direction of the descriptive helix at end points of the knife. By such a drawing, a radius of the helix of the knife considered in a plane perpendicular to a longitudinal axis of the respective knife is reduced, and consequently the knife is pressed onto the cylinder body. By subsequently fixing each of the knives pressed onto the cylinder body in this manner, a high frictional force, which results between the respective knife and the cylinder body as a result of the pressing together of the two parts, can be preserved.

Using the method of the type described above, this fixing is usually achieved by anchoring the knife or the tension elements at anchoring points. While the anchoring points of the traction elements are typically formed by abutment bodies, the blades can be fastened to the cylinder body by means of self-tapping screws, for example, after the insertion of corresponding bores in the root leg of the blade and the outer surface area of the cylinder body. Such a procedure ensures that the knives are positively connected with the cylinder at any point along their helical shape.

A complete knife set of a typical cutter comprises about 10 to 30 knives. In this case, the above method is not performed separately in succession for each individual knife, but there is a parallelism of the method steps. In detail, this means that all belonging to the respective cutting device knives are loosely mounted on the cylinder body and then installed according to the procedure explained. However, before the already under tension knife are permanently fixed individually on the cylinder body, selbige be aligned with each other, so that an optimal distribution of the knife can be achieved on the cylinder body. Alternatively, however, it is conceivable to equip a cylinder body with only a single knife for certain applications. In such a case eliminates a mutual alignment of multiple knives.

The known method is subject to two disadvantages. Thus, on the one hand, it is necessary that, separately for the production of each knife, two corresponding tension elements must be manufactured which must be firmly connected to the same in advance of the described drawing of the knife. This is done according to the prior art usually by welding or soldering of knives and tension members during the knife production. The respective tension elements are considered lost accordingly, since they can not be removed again after assembly of the knife but remain permanently connected to the knives, because they are bolted to the abutment bodies of the cylinder body. This results in a significant overhead in the production of a fully equipped with knives cutting device, which stems from the necessary production of a variety of tension elements and the cost of their connection with the respective knives.

Second, it is provided in the prior art that the tension elements must be fixed by means of already mentioned abutment body, so-called "side windows" at the ends of the respective cylinder body, so that applied to the knife bias, the said pressing the knife on the Cylinder body causes, is maintained. So it is customary today to connect said firmly connected to the knives tension elements, for example by a screw with the abutment bodies. In addition to the tension elements themselves, so it is also in the abutment bodies permanently installed in cutting devices parts that must be made for each individual cutting device again and accordingly cause an increased total effort, although in a refilling of a cylinder body with new knives, the abutment body in conjunction with a new knife set can be used again.

task

The invention has for its object to further develop a method of the type described above such that a simplification of the method is achieved.

solution

1. d) Von dem Messer wird jeder ein Zugelement aufweisender Endabschnitt abgetrennt.
2. e) Der mindestens eine abgetrennte Endabschnitt wird zusammen mit dem jeweils zugehörigen Zugelement entfernt.

The object is achieved in claim 1, characterized in that the method described above is supplemented by the following method steps:

1. d) From the knife each traction element exhibiting end portion is separated.
2. e) The at least one separated end portion is removed together with the respectively associated tension element.

By carrying out these method steps, the at least one tension element can be recovered and used as often as desired for the assembly of one or more further knives. In this way, a number of manufactured tension elements in connection with the production of knives is drastically reduced and consequently, a cost for their production and their installation can be saved to the respective knife.

In order that the at least one end portion of the knife, which has a tension element, can be removed at all, it is necessary in carrying out the method that at the execution of the already known in the prior art method of attachment of the knife on the cylinder body by means of screws a number of screws is set, which is typically well above the number which is necessary in the prior art. Since the bias applied to the blade by means of the at least one tension element is no longer held above the tension element after assembly according to the method according to the invention, this must be done via an increased contact pressure of the blade on the cylinder body. The screws, which are set by the foot leg of the knife in the cylinder body, cause in this context a normal force in the form of a pressing force, which presses the knife on the cylinder body. The thus activated frictional force between the knife and cylinder body is finally able to hold the knife in its prestressed form, without which it must be fixed by means of one or more tension elements in one or more Wideriagerkörpern longer. The at least one tension element is thereby superfluous and can be removed accordingly.

According to the invention, this removal takes place via a separation of the respective end portions of the knives facing an abutment body, each of which includes a clamping portion, in each of which a tension element is connected to the knife. This can be achieved for example by means of an angle grinder.

In a particularly advantageous form, the method is carried out using knives, which are tensioned by means of two tension elements, which are connected in a force-transmitting manner in each case in a clamping section with the knife. In this way, an adjustment or alignment of the knife with each other on the cylinder body is possible even after a tensile stress has already been applied to the individual knives. In an embodiment of the knife with an anchoring point in the form of a screw connection of the respective knife with the cylinder body, a position of the knife is at least partially fixed before applying a tensile force. An alignment of the unilaterally anchored on the cylinder body knife, which are usually anchored in a central region on the cylinder body and subsequently pulled from there in the direction of a respective associated bearing pin or a respective associated bearing bore should be advantageously designed so that the End portions of the knives anchored in said central region overlap by an amount of overlap.

If the method is carried out by means of two tension elements, it is also advantageous if the blade is pressed during assembly by the cylinder body, that both tension elements are moved relative to the cylinder body. This movement should typically take place in such a way that the distance of the tension elements from one another increases. In this way, the knife can be biased with a tensile stress so that a radius of the helix describing it is reduced, and finally, after elimination of the complete radial clearance between the knife and the cylinder body comes into contact with the cylinder body. The advantage of a relative movement of both tension elements to the cylinder body is that a friction loss occurring in the preload of the blade caused by the contact with the cylinder body, which is caused by a rubbing of the blade on the cylinder body, is reduced. A friction path along the blade is approximately halved by this method step compared to one in which only one tension element is moved relative to the cylinder body. This is of great importance especially for cylinder bodies with a high degree of wrap around the blades.

If, on the other hand, the method according to the invention is carried out using only one pulling element per knife, this can be achieved particularly simply by forming the anchoring point of the end section of the knife, which has no pulling element, by connecting the knife to the cylinder body by means of a bolt-like fastening means.

As already described above, such a fastening means may for example be formed by a self-tapping screw which is introduced into a previously introduced bore in the leg of the blade and the outer circumferential surface of the cylinder body.

The anchoring points of the tensioning sections of the knives connected tension elements should - regardless of whether one or two tension elements per knife are used - preferably be arranged on abutment bodies.

Abutment bodies have the advantage that almost any number of tension elements can be anchored to an abutment body.

They are also particularly advantageous if they can also be removed after a separation and removal of each of the abutment bodies facing end portions of the knife or the associated tension elements.

After the severed end portions and traction elements are completely removed, the abutment bodies are no longer necessary in their function as anchoring point for the tension elements and can therefore also be removed. As well as the tension elements, they are consequently only necessary during the assembly of the knives on a cylinder body and accordingly do not have to be newly produced for each cutting device. Another expense saving is the result. In contrast to the tension elements is only to be noted that different types of cylinder bodies, for example in the sense of different diameter of the cylinder body and bearing pin, also require different abutment body.

By means of a successful implementation of the method according to the invention, a knife can be produced in the form of a helical line, which is formed in one piece.

Making the complete knife of several parts, namely the knife itself and the at least one associated tension element as in the prior art is no longer required using the method described, since the at least one end portion and, associated therewith, the at least one tensioning portion, in the at least one tension element is connected to the knife, be removed anyway in the course of the process. A one-piece production of the knife, which is subsequently provided only temporarily with at least one tension element, for example by hooking, welding or jamming, is correspondingly advantageous.

Also, a knife can be produced, which has two end faces, which are flat and each extending at a right angle to the longitudinal axis of the knife.

End faces of this type, for example, by separating longer pieces of the profile material in production by means of suitable cutting or cutting tools or separators. By flat front sides, especially a reduction risk of injury from irregular edges on the front sides of the knife can be achieved.

Optimally, the knife should also be made so that it can be connected in force-transmitting manner with at least one tension element so that the tension element is non-destructively removable again.

Only with the use of such a knife and at least one associated tension element is the advantage of reusability of the tension element realizable. One way to implement this is to provide in each case a recess in the at least one clamping section of the knife, this recess is optimally arranged close to the end in the knife and should have the shape of a laterally open recess or a closed opening. A recess of this type can for example be combined with a tension element, which in turn has a pin which fits in said aperture or has a loop which engages in a laterally open recess. In this way, a positive connection between the knife and the tension element can be achieved, which allows applying a bias to the knife. After the knife is then fixed on the cylinder body by means of screws, the end sections of the knives provided with tension elements can be cut off and the respective tension elements can be removed. An exemplary selection conceivable Zugelementvarianten can be found in the embodiments.

The reduction of the expense of the method according to the invention using such knives with corresponding tension elements helps to reduce the material necessary for production of an entire cutting device compared to the conventional methods, because the tension elements must be made only once in the optimal case and due to their non-destructive recoveries are subsequently reusable.

For carrying out the method according to the invention, such a cylinder body is of particular advantage, having two outgoing from the lateral surface of the cylinder body, each circumferential along the circumference of the lateral surface grooves, each aligned parallel to a plane perpendicular to the longitudinal axis of the cylinder body plane are and are in each case a subsequent to a respective journal or a bearing bore end portion of the cylinder body.

By providing such grooves, the step of separating the at least one end portion of the knife is particularly easy to carry out, since they provide space available for a tool used to sever the end portion. If, for example, an angle grinder is used, it can, after a complete separation of an end section of the knife, enter with its cutting edge into the intended groove and does not strike directly on an outer circumferential surface of the cylinder body.

The object can also be achieved according to the invention particularly well by a cutting device of the type described above, which differs from the prior art in that a working range of the cutting device has a width which both a projected on the longitudinal axis of the cylinder body length of the knife and a axial length of the cylinder body outside the bearing pin corresponds, see claim 7.

The work area is defined in this context as the area in which a material to be processed actually processed, so for example, effectively cut or milled ("folded"), depending on the area in which a cutting direction described is used (textile fibers or leather ). In the case of a cutting device for shearing textiles, for example, this cutting device usually has a fixed cutting edge, against which the knives shear on a rotating cylinder body and thereby cut textile fibers. The working area for such a case is to be understood as the area in which the rotating blades interact with the cutting edge.

Due to the fact that at least one end section of the knives is separated according to the method according to the invention, a projection of the cylinder body beyond the width of the working area is not necessary. Therefore, it is possible not to equip a cylinder body to be newly manufactured as described merely with a groove, but to manufacture it directly in such a length that the front sides of the blade flush with corresponding end faces of the cylinder body and the work area of each one extends to the other end face of the cylinder body. On the other hand, provision of a groove in a cylinder body is of interest, above all, for already existing cylinder bodies which, in the course of fitting with a new set of blades, are such Retrofit can be used to both knives according to the prior art (with firmly connected tension members) and to be able to use according to the invention. A width of the working area corresponds to the distance between the grooves and remains unchanged compared to conventional knives.

Furthermore, a cutting device is particularly advantageous if at least one abutment body, on which the at least one knife is supported during its assembly, after a complete assembly of the same is removable.

The inventive method is carried out using such a cutting device in the particularly advantageous embodiment, which provides for removing at least one abutment body after a separation of the abutment body facing end portions of all connected to the abutment body knife. The removable abutment bodies may be further used hereinafter for one or more subsequent mounts of one or more knives. Analogous to a recovery of the tensile elements used, this leads to a further cost savings during production.

embodiments

The inventive method and the cutting device according to the invention will be explained in more detail with reference to embodiments that are illustrated in the following drawings.

Fig. 1:

eine erfindungsgemäße Schneideinrichtung aufweisend ein Messer und einen Zylinderkörper während einer Montage,

Fig. 2:

wie Figur 1, jedoch nach Beendigung der Montage,

Fig. 3:

wie Figur 2, jedoch mit einer anderen Variante des Zylinderkörpers,

Fig. 4a - Fig. 4g:

eine beispielhafte Ausführung zerstörungsfrei von einem Spannabschnitt entfernbarer Zugelemente,

Fig. 5a - Fig. 5c:

drei Varianten für eine temporäre und zerstörungsfrei lösbare Verbindung zwischen einem Messer und einem Zugelement und

Fig. 6:

einen schematischen Querschnitt eines Messers.

It shows:

Fig. 1:

a cutting device according to the invention comprising a knife and a cylinder body during assembly,

Fig. 2:

as FIG. 1 but after completion of assembly,

3:

as FIG. 2 but with another variant of the cylinder body,

FIGS. 4a-4g:

an exemplary embodiment non-destructive of a tensioning section removable tension members,

5a-5c:

three variants for a temporary and non-destructive detachable connection between a knife and a tension element and

Fig. 6:

a schematic cross section of a knife.

FIG. 1 shows a cutting device 1, comprising a cylinder body 2 and a knife 3. As already described above, usually complete sets of blades are mounted so that the steps described here are carried out in parallel for a plurality of blades 3. For certain applications, however, it may also be the case that only one blade 3 is mounted on the cylinder body 2. The method used is explained here by way of example on a cutting device 1 which, while having a plurality of knives 3 in the operating state, is explained by the simplicity of the assembly process, however, only by means of a single knife 3.

At the two ends of the blade 3 tension elements 4 are each arranged in a clamping section. These tension elements 4 each connect the blade 3 with an abutment body 5. The abutment body 5 shown here in turn has a side plate 22 and an adapter 23. The cylinder body 2 consists of a region 6 in which it has a larger diameter D 1 and two, each arranged at the ends of the cylinder body 2, areas in which it has a smaller diameter D2. The latter areas are also referred to as bearing pin L. In end portions of the region 6, the cylinder body 2 in each case has a groove 7, which delimit a working area A.

The cutting device 1 is in an illustrated configuration currently in an assembly process in which the single blade 3 is mounted on the cylinder body 2. For this purpose, the knife 3 is initially loose, so with a certain radial clearance, mounted on the cylinder body 2. Subsequently, two tension elements 4 are brought with a first end with the clamping portions of the blade 3 into engagement, so that they are connected in a force-transmitting manner with the blade 3. A second end of the tension elements 4 is respectively connected to the abutment body 5 on the side plate 22 in a force-transmitting manner, for example screwed to the side window 22. The following is through a movement Both tension elements 4 relative to the cylinder body 2 such that a distance between the tension elements 4 increases, a bias applied in the form of a tensile stress on the knife 3. This results in a longitudinal extension of the blade 3, which is reflected equally in a reduction of a radius defining a helix describing the blade 3. By applying a sufficiently large preload, it is finally achieved that the radius of the helix describing the blade 3 is reduced to such an extent that the radial play between the blade 3 and the cylinder body 2 disappears and the blade 3 rests completely on the cylinder body 2 along its length , If the bias is increased beyond that, the knife 3 is additionally pressed onto the cylinder body 2. In a state now reached the knife 3 is under a tensile stress, which is removed via the tension elements 4 in the respective abutment body 5. The latter is supported with its adapter 23 again against end faces 10 of the region 6 of the cylinder body 2, so that the cutting device 1 is in total in an external equilibrium of forces.

Assuming that a complete set of blades is mounted on the cylinder body 2 and not just a single blade 3, now in a subsequent process step, the plurality of blades 3 would first have to be aligned with each other, so that they assume an optimal position on the cylinder body 2 , Only then they would be fixed by means of screws 8 on the cylinder body 2. Under the simplified assumption here only of a knife to be installed 3, this step of mutual alignment is eliminated and the knife 3 is fixed directly on the cylinder body 2 by means of screws 8. For this purpose, the cylinder body 2 is pre-drilled at corresponding locations and fixed by means of self-tapping screws 8.

The screws 8 are optimally tightened so tight that a contact pressure between the blade 3 and the cylinder body 2 is so large that the force acting on the knife 3 bias is completely absorbed by a friction between the blade 3 and the cylinder body 2.

If an attachment of the blade 3 to the cylinder body 2 is completed, the abutment bodies 5 facing end portions 20 of the blade 3, which include the clamping portions, separated in a subsequent process step. This can be done for example by means of an angle grinder. This should be done in a plane that is about is perpendicular to a longitudinal axis 9 of the cylinder body. A cut with the angle grinder should also be set so that after a complete severing of the blade 3, a cutting edge of the angle grinder can enter the groove 7, which is just provided for this purpose. An uncontrolled damage to an outer circumferential surface of the cylinder body 2 can thus be avoided. After both end portions 20 and the associated tension elements 4 have been separated from the blade 3, they can be removed . The same applies to the abutment body. 5

A tension element 4 optimally engages in the tensioning section of a blade 3 in such a way that it can be removed again without destroying it. In this way, each individual tension element 4 can be reused as often as desired. The same applies to the abutment body 5, which is damaged by an assembly of one or more blades 3 in any way.

A cutting device 1 according to the invention, equipped with a knife 3, is after completion of a complete inventive method in FIG. 2 shown. The Enda b sections 20 of the blade 3 are separated and removed at an edge of the groove 7, as well as the tension elements 4 and the abutment body fifth

FIG. 3 shows a further cutting device 1 'according to the invention, as well as the cutting device 1 from FIG. 2 is in a finished state and equipped with a knife 3. A difference between the cutting device 1 'and the cutting device 1 lies in a cylinder body 2'. This has no groove 7 in comparison to the cylinder body 2. Instead of an arrangement of a groove 7 of the cylinder body 2 'is made so that it is flush with the finished mounted knife 3. An end face 1 1 of the blade 3 is correspondingly in the same plane as the end face 10 of the region 6 of the cylinder body 2 '. As a result, a working area A of the cutting device 1 'corresponds to a length of the blade 3 projected onto the longitudinal axis 9 of the cylinder body 2', that is to say the entire axial length of the cylinder body 2 'outside the bearing journal L.

The FIGS. 4a to 4g show a selection of conceivable embodiments of tension elements 4. These always have a rod element 15 and a head element 16. In particular, the rod element 15 is similar or identical in all variants. It usually has an external thread, which can be used in the course of assembly for applying a tensile force to the blade 3. For this, the rod element 15 through an opening in the abutment body 5 and on a side facing away from the cylinder body 2, 2 'side of the abutment body 5 is provided with a closure element having an external thread of the rod member 15 corresponding internal thread. Usually come as a final element hex nuts are used. By screwing the end element onto the external thread of the rod element 15, the latter is moved relative to the abutment body 5 in the direction of a free end of the associated journal L. Provided that the other end portion 20 of the blade 3 is either fixed or optimally tensioned in a same manner by means of a tension member 4 in an abutment body 5, tensile stresses are generated in the blade 3 as desired.

Concrete differences between the tension elements 4 result from different embodiments of the head elements 16. The in the FIGS. 4a and 4b shown pulling elements 4 can be connected to the clamping portion of the blade 3 via a bolt 17 which engages in a recess in the clamping portion. The clamping portion is inserted for this purpose in a recess 18 of the tension member 4 and the bolt 17 then passed through the recess in the clamping portion. In this way, a positive connection between the knife 3 and the tension element 4 comes about. The variants of the FIGS. 4a and 4b differ only by a number of bolts 17 used with the help of two bolts 17 (variant from FIG. 4b ) greater tensile forces between the tension element 4 and the blade 3 can be transmitted as this by using a tension element 4 according to FIG. 4a is possible.

While the bolts 17 in the embodiments of the FIGS. 4a and 4b are stored in two legs of the head member 16 of the tension member 4 is in further in the FIGS. 4c to 4g illustrated embodiments, the head member 16 is provided with only one leg, in which the bolt 17 is mounted. A connection principle between the respective tension element 4 and the blade 3 is identical to that described above. The cantilevered bolts 17 are inclined only at a certain angle against a plane perpendicular to a longitudinal axis of the tension element 4. This ensures that, despite one in accordance with a in Figure 4c shown arrow acting force always brings an elastic deformation of the bolt 17 in the direction of the arrow, the bolt 17 is not accidentally from the recess or the breakthrough of the clamping portion of the knife 3 slips out. As described above, here too a doubling of the number of bolts 17 compared to the FIGS. 4c / d and 4e / f a transmission of greater tensile forces between the tension element 4 and the knife. 3

Of a principle of a cantilevered bolt 17 running identical is the embodiment variant in Figure 4g is shown. The bolt 17 is formed in this case only in the form of a hook 19.

The FIGS. 5a to 5c show by way of example how the tension elements 4 according to the FIGS. 4a, 4d and 4g can be connected with the knife 3. In all three examples, a power transmission between the respective tension element 4 and the blade 3 is achieved via a positive connection.

FIG. 6 shows a schematic cross-section of a typically built knife 3, comprising a Fußschenkel 12 and a cutting edge 13. At an end remote from the Fußschenkel 12, the cutting edge 13 has a cutting surface 23 and a cutting edge 14, the latter in an operation of a cutting device 1, 1 ' performs a processing of a material to be processed. The foot leg 12 is pressed in the course of the process for mounting the helical knife 3 by means of screws 8 on the cylinder body 2, 2 '. Between the foot leg 12 and the cylinder body 2, 2 'activated frictional forces acting in the knife 3 tensile stresses in the cylinder body 2, 2' a. The cutting surface 23 has in operation of the cutting device 1, 1 'contact with a counter-blade.

LIST OF REFERENCE NUMBERS

1

cutter

1'

cutter

2

cylinder body

2 '

cylinder body

3

knife

4

tension element

5

Abutment body

6

Area

7

groove

8th

screw

9

longitudinal axis

10

face

11

front

12

foot legs

13

cut leg

14

cutting edge

15

rod element

16

header

17

bolt

18

recess

19

hook

20

end

21

side window

22

adapter

23

cutting surface

A

Workspace

D1

diameter

D2

diameter

L

pivot

Claims (8)

1. A method for assembling a blade (3) that follows a helix onto an outer surface shell of a cylinder body (2, 2') that has a longitudinal axis (9), comprising the following method steps:

   a) The blade (3), which has a base leg (12) and a cutting leg (13) arranged thereto at an angle, said cutting leg having a cutting edge (14) facing away from the base leg (12), is arranged with the base leg (12) on the outer surface shell of the cylinder body (2, 2').

   b) By means of at least one tension element (4), which, in each case in a tensioning section, is connected in a force-transmitting manner to the blade (3), the blade (3) is tensioned in the direction of the longitudinal axis (9) of the cylinder body (2, 2') in that the at least one tension element (4) and also each end portion (20) of the blade (3), which end portion has no tension element (4), are supported in each case at a anchoring point, and at least the one tension element (4) is acted on with a force that acts in the direction of the helix at an end of the blade (3), as a result of which the blade (3) is pressed with a contact surface of the base leg (12) against the outer surface shell of the cylinder body (2, 2').

   c) The blade (3) is fastened to the cylinder body (2, 2') by means of screws (8) which penetrate through the base leg (12),
   characterized by the following method steps:

   d) each end portion (20) which has a tension element (4) is cut off from the blade (3).

   e) The at least one cut-off end portion (20) and the associated tension element (4) are removed.
2. The method according to claim 1, characterized in that the blade (3) is tensioned by means of two tension elements (4), which, in each case in a tension section, are connected in a force-transmitting manner to the blade (3).
3. The method according to claim 2, characterized in that the blade (3) is pressed onto the cylinder body (2, 2') in that both tension elements (4) are moved relative to the cylinder body (2, 2').
4. The method according to claim 1, characterized in that the anchoring point of that end portion (20) of the blade (3) that has no tension element (4) is formed by a connection of the blade (3) to the cylinder body (2) by means of a pin-like fastening means.
5. The method according to any one of the claims 1 to 4, characterized in that at least one tension element (4) is anchored at an anchoring point that is arranged on a counter bearing body (5).
6. The method according to claim 5, characterized in that after cutting off and removing each of those end portions (20) of the blade (3) that face towards the counter bearing bodies (5), at least one of the counter bearing bodies (5), preferably all counter bearing bodies (5) are likewise removed.
7. A cutting device (1') for cutting textile goods, textile fibers or leather goods, comprising a rotatable cylinder body (2') with a longitudinal axis (9) and an outer surface shell as well as two bearing journals (L) which protrude at both ends of the cylinder body (2') and are aligned coaxial with the longitudinal axis (9) of said cylinder body or with bearing bores, and at least one blade (3) in the form of a helix, with a longitudinal axis and a base leg (12), and a cutting leg (13) that is arranged at an angle to said base leg and has a cutting edge (14) that faces away from the base leg (12), wherein the blade (3) is pressed onto the cylinder body (2'), as a result of which it is connected thereto in a positive-locking manner, characterized in that an operating region (A) of the cutting device (1') has a width which corresponds to a length of the blade (3), which length is projected onto the longitudinal axis of the cylinder body (2').
8. The cutting device according to claim 7, characterized in that at least one counter bearing body (5), at which the at least one blade (3) is supported during its assembly, can be removed after its completed assembly.

Images