WO2013159960A1

WO2013159960A1 - Power cutting tool

Info

Publication number: WO2013159960A1
Application number: PCT/EP2013/053858
Authority: WO
Inventors: Milan Bozic
Original assignee: Robert Bosch Gmbh
Priority date: 2012-04-25
Filing date: 2013-02-27
Publication date: 2013-10-31
Also published as: DE102012206763A1

Abstract

The invention relates to a power cutting tool comprising at least one cutting strand (12a; 12a'; 12b; 12b'; 12c; 12c') which has at least three directly subsequent cutting elements (16a, 18a, 20a; 16a', 18a', 20a'; 16b; 16b', 18b', 20b'; 16c; 16c', 18c', 20c') along a cutting direction (14a; 14a'; 14b; 14b'; 14c; 14c') of the cutting strand (12a; 12a'; 2b; 12b'; 12c; 12c'). According to the invention, the three cutting elements (16a, 18a, 20a; 16a', 18a', 20a'; 16b; 16b', 18b', 20b'; 16c; 16c', 18c', 20c') have skew angles that differ from each other relative to a cutting plane (22a; 22a'; 22b; 22b'; 22c; 22c') of the cutting strand (12a; 12a'; 12b; 12b'; 12c; 12c').

Description

description

Machine tool separating device prior art

Machine tool separating devices are already known which have a cutting strand which comprises three directly successive cutting elements along a cutting direction of the cutting strand.

Disclosure of the invention

The invention is based on a power-tool parting device with at least one cutting strand which comprises at least three directly successive cutting elements along a cutting direction of the cutting strand.

It is proposed that the three cutting elements have mutually different Schränkungswinkel relative to a cutting plane of the cutting strand. A "cutting strand" is to be understood here as meaning, in particular, a unit which is intended to locally neutralize an atomic cohesion of a workpiece to be machined, in particular by means of a mechanical separation and / or by means of a mechanical removal of material particles of the workpiece It is preferable to separate the workpiece into at least two physically separate parts and / or at least partially separate and / or remove material particles of the workpiece starting from a surface of the workpiece. The cutting strand is particularly preferably moved circumferentially in at least one operating state, in particular along a circumference of a guide unit of the power-tool parting device. The term "guide unit" is intended here to define in particular a unit which is intended to exert a constraining force on the cutting strand at least along a direction perpendicular to the cutting direction of the cutting strand, in order to allow the cutting strand to move along the cutting direction

Guide element, in particular a guide groove through which the cutting strand is guided. When viewed in a cutting plane, the cutting strand is preferably guided along an entire circumference of the guide unit by the guide unit by means of the guide element, in particular the guide groove. A "cutting direction" is to be understood here as meaning, in particular, a direction along which the cutting strand is used to produce a cutting gap and / or for separating and / or removing material particles of a workpiece to be machined in at least one operating state as a result of a drive force and / or a drive torque, The cutting strand and the guide unit preferably together form a closed system. which comprises at least two components which, by means of interaction in a disassembled state of the system, retain functionality from a system superordinate to the system, such as a machine tool, and / or which, in the disassembled state, are captive are connected to each other. Preferably, the at least two components of the closed system are at least substantially inseparably connected with each other for an operator. By "at least substantially insoluble" should be understood in particular a combination of at least two components that only with the aid of separation tools, such as a saw, in particular a mechanical saw, etc., and / or chemical release agents, such as solvents, etc. , are separable from each other.

In addition, a "setting angle" is to be understood here as meaning, in particular, an angle which is enclosed by a cutting element which is inclined relative to the cutting plane and the cutting plane, the angle in particular having an angle deviating from 0.degree .. The term "cutting plane" is intended here in particular define a plane in which the cutting strand is moved in at least one operating state to a machining of a workpiece. In front- Preferably, the cutting strand is moved in the cutting plane along a circumference of the guide unit in at least two mutually oppositely directed cutting directions relative to the guide unit. Preferably, the

When machining a workpiece cutting plane aligned at least substantially transversely to a machined workpiece surface. The term "at least essentially transversal" is to be understood here as meaning, in particular, an alignment of a plane and / or a direction relative to a further plane and / or a further direction, preferably a parallel orientation of the plane and / or the direction relative to the other Level and / or the other direction, but it is also conceivable that the

When processing a workpiece, the cutting plane is aligned at least substantially parallel to a machined workpiece surface, in particular when the cutting strand is designed as an abrasive, etc. By "at least essentially parallel", an orientation of a direction relative to a reference direction, in particular in FIG A plane can be understood, wherein the direction relative to the reference direction has a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2.degree .. By means of the embodiment according to the invention of the power-tool parting device, an exemption of cutting edges of the cutting elements can be achieved structurally In particular, in the case of a small tooth pitch, it is thus advantageously possible to achieve a precise work result by means of the cutting strand or the cutting elements.

Furthermore, it is proposed that the cutting strand, viewed along a direction extending at least substantially parallel to the cutting plane of the cutting strand and at least substantially perpendicular to the cutting direction, along a total extension of the cutting strand has a wavy-edged cutting element arrangement. By "substantially parallel" is intended to be understood in particular an orientation of a direction relative to a reference direction, in particular in a plane, wherein the

Direction relative to the reference direction has a deviation in particular less than 8 °, advantageously less than 5 ° and particularly advantageously less than 2 °. As used herein, the term "wavy cut cutter assembly" is intended to define an arrangement of the cutting elements relative to one another along the entire length of the cutting strand, the assembly having a repeating pattern along the cutting direction, with at least three directly consecutive cutting elements spaced from one another have different Schränkungswinkel, are inclined in a direction relative to the cutting plane, then at least one at least substantially parallel to the cutting plane extending cutting element follows and then at least three directly successive cutting elements follow that have vonein- different Schränkungswinkel and in a direction opposite to the direction in the first three cutting elements are inclined, extending direction are inclined relative to the cutting plane. However, it is also conceivable that in each case more than three cutting elements are inclined in the direction and the direction oppositely directed relative to the cutting plane or arranged more than one at least substantially parallel to the cutting plane extending cutting elements between the three inclined

Cutting elements are arranged. By means of the design of the cutting strand according to the invention, a particularly advantageous freedom of cutting edges of the cutting elements can be achieved relative to each other along the entire extension of the cutting strand, whereby a high cutting performance can be achieved.

It is also proposed that the cutting strand at least one

Includes cutter support member which is integrally formed with at least one of the at least three cutting elements. The term

In this case, "cutter carrier element" should in particular define an element on which at least one cutting element is arranged for separating and / or removing material particles of a workpiece to be machined. "Integral" is to be understood here in particular as at least materially connected, for example by a welding process , an adhesive process, an injection molding process and / or another process which appears expedient to the person skilled in the art, and / or advantageously shaped in one piece, for example by casting production and / or by production in a one- or multi-component injection molding process and advantageously from a single blank. Preferably, the cutting element and the cutter support element are punched from a single blank. However, it is also conceivable that the cutting element by means of another, to a person skilled in the sense appearing manner on the

Edge carrier element is fixed, such as by means of a positive and / or non-positive connection. As a result of the one-piece design of the cutting element and the cutter support element, an assembly effort and costs can be saved particularly advantageous. In an alternative embodiment of the power-tool parting device, the cutting strand has at least one cutting-edge support element on which the at least three cutting elements are arranged. Thus, in particular, the cutting elements are each arranged inclined to the cutter carrier element in relation to an outer surface of the cutter carrier element. The cutting elements can in this case in particular by means of a non-positive, by means of a positive and / or by means of a material connection to the

Be arranged cutting edge support element. Due to the arrangement of the three cutting elements on a cutter support element can advantageously a high

Particle removal per blade carrier element of the cutting strand can be achieved. Advantageously, the three cutting elements are formed integrally with the cutter support element. Thus, an advantageous component savings can be achieved.

In addition, it is proposed that the cutting strand has an alternating tooth pitch that changes along the cutting direction. The term "tooth pitch" is intended in this case to define, in particular, a spacing of two cutting edges of cutting elements of the cutting strand that directly follow one another along the cutting direction

Machine tool separating device can advantageously a wide range of applications, especially with regard to a material to be processed, can be achieved. Furthermore, it is proposed that the cutting strand at least one

Cutting support member comprises, on which at least one of the three cutting elements is arranged, wherein the cutter support member at least together with the cutter support element arranged on the cutting element has a maximum volume which is smaller than 15 mm. ³ Preferably, the cutting element together with the cutter support element has a maximum volume which is smaller than 10 mm ³ and particularly preferably smaller than 5 mm ³ . Particularly preferably, the cutter support element, together with three cutting elements arranged on the cutter carrier element, has a maximum weight which is less than 15 mm ³ . It can be advantageously realized a cost-effective production, with a low material usage is necessary. In addition, it is proposed that the cutting strand at least one

Cutting edge support element comprises, on which at least one of the three cutting elements is arranged, wherein the cutter support element, at least together with the cutting element arranged on the cutting element has a maximum weight, which is less than 1 g. The cutter support element has at least together with the cutting element arranged on the cutting element in particular a maximum weight which is less than 0.8 g, preferably less than 0.5 g and more preferably less than 0.2 g. It can be advantageously achieved a lightweight construction of the cutter support member together with the cutting element.

Furthermore, the invention is based on a cutting strand segment of a cutting strand of a power-tool parting device according to the invention. A "cutting-strand segment" is to be understood here as meaning, in particular, a segment of a cutting strand which is intended to be connected to further segments of the cutting strand to form the cutting strand In this case, the cutting strand segment can be formed as a drive element, as a connecting element, as a cutting element, etc. of a cutting chain Preferably, the cutting strand segment comprises at least one cutter carrier element and at least one cutting element a cutting strand segment according to the invention can be achieved.

Furthermore, the invention is based on a machine tool having at least one coupling device for the positive and / or non-positive coupling with a machine tool separating device according to the invention. The machine tool is preferably designed as a portable machine tool. A "portable power tool" is to be understood here in particular as meaning a power tool, in particular a hand tool, which can be transported by an operator so that it can not be transported by a machine The portable power tool in particular has a mass which is less than 40 kg, preferably less than 10 kg and The machine tool and the machine tool separating device preferably together form a machine tool system. According to the invention configuration of the machine tool, a machine tool can advantageously be achieved, which is particularly advantageous for a wide range of applications. The machine tool separating device according to the invention, the cutting strand segment according to the invention, the machine tool according to the invention and / or the machine tool system according to the invention should / should not be limited to the application and embodiment described above. In particular, the power-tool parting device according to the invention, the cutting-strand segment according to the invention, can be the inventive

Machine tool and / or the machine tool system according to the invention for performing a function described herein have a number differing from a number of individual elements, components and units mentioned herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, 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.

Show it:

1 shows a machine tool according to the invention and a machine tool separating device according to the invention, which together form a machine tool system according to the invention, in a schematic representation,

2 is a detailed view of the machine tool separating device according to the invention in a schematic representation,

3 is a detailed view of a Schneidstrangseg- ment invention in a schematic representation, 4 is a detailed view of a Schneidelementenanorndung of

Cutting strand in a schematic representation,

Fig. 5 is a detail view of an alternative invention

Cutting strand segment in a schematic representation, Fig. 6 is a detail view of a Schneidelementenanorndung a the

Cutting strand segment of Figure 5 comprehensive cutting strand in a schematic representation,

7 shows a detailed view of a further alternative cutting strand segment according to the invention in a schematic illustration, FIG. 8 shows a detailed view of a further, alternative cutting strand segment according to the invention in a schematic representation,

9 is a detailed view of another, alternative cutting strand segment according to the invention in a schematic representation and

10 shows a detailed view of a further alternative cutting strand segment according to the invention in a schematic representation.

Description of the embodiments

FIG. 1 shows a machine tool system comprising a machine tool 40a and a machine tool separator 10a. The machine tool 40a is designed here as a portable machine tool. The machine tool separating device 10a comprises at least one cutting strand 12a, which along a cutting direction 14a of the cutting strand 12a comprises at least three directly successive cutting elements 16a, 18a, 20a (FIG. 2). The three cutting elements 16a, 18a, 20a in this case have differing Schränkungswinkel relative to a cutting plane 22a of the cutting strand 12a (Figure 4). Furthermore, the cutting strand 12a comprises at least three cutting-strand segments 34a, 36a, 38a, which each comprise a cutting-carrier element 24a, 26a, 28a, on each of which one of the cutting elements 16a, 18a, 20a is arranged. The cutting elements 16a, 18a, 20a are each formed integrally with the respective cutter support element 24a, 26a, 28a. In this case, the cutter support elements 24a, 26a, 28a in each case at least together with the cutter carrier element 24a, 26a, 28a arranged Cutting element 16a, 18a, 20a a maximum volume which is smaller than 15 mm. ³ In addition, the cutter support elements 24a, 26a, 28a each have a maximum weight, which is less than 1 g, at least together with the cutting element 16a, 18a, 20a disposed on the cutter support element 24a, 26a, 28a.

Furthermore, the power-tool parting device 10a comprises at least one guide unit 44a for guiding the cutting strand 12a, wherein the guide unit 44a and the cutting strand 12a together form a closed system. The machine tool 40a has at least one coupling device 42a for the positive and / or non-positive coupling with the power-tool parting device 10a. In this case, the coupling device 42a can be designed as a bayonet closure and / or as another coupling device that appears meaningful to a person skilled in the art. Furthermore, the machine tool 40a has a machine tool housing 46a, which has a

Drive unit 48a and a gear unit 50a of the machine tool 40a encloses. The drive unit 48a and the gear unit 50a are connected to one another in a manner already known to a person skilled in the art in order to generate a drive torque that can be transmitted to the power tool parting device 10a. The gear unit 50a is designed as an angle gear. The drive unit 48a is designed as an electric motor unit. However, it is also conceivable for the drive unit 48a and / or the gear unit 50a to have another configuration that appears appropriate to a person skilled in the art. The drive unit 48 a is provided to the

Cutting strand 12a of the power-tool parting device 10a in at least one operating state via the gear unit 50a to drive. Here, the cutting strand 12a in the guide unit 44a of the machine tool separating device 10a is moved along the cutting direction 14a of the cutting strand 12a in the guide unit 44a.

FIG. 2 shows the power-tool parting device 10a in a state decoupled from the coupling device 42a of the machine tool 40a. The machine tool separating device 10a has the cutting strand 12a and the guide unit 44a, which together form a closed system. The cutting strand 12a is guided by the guide unit 44a. For this purpose points the guide unit 44a at least one guide element designed as a guide groove (not shown here in detail), by means of which the cutting strand 12a is guided. Here, the cutting strand 12a is guided by the guide groove bounding edge regions of the guide unit 44a. However, it is also conceivable that the guide element in another, a person skilled in the sense appearing manner, such as rib-like Anformung on the guide unit 44 a, in a recess on the

Cutting strand 12a engages, is formed. The cutting strand 12a comprises a total of a plurality of interconnected cutting strand segments 34a, 36a, 38a.

To drive the cutting strand 12a, the power-tool parting device 10a or the machine tool 40a has a torque-transmitting element 52a which can be connected to the drive unit 48a and / or the gear unit 50a to transmit forces and / or torques to the cutting strand 12a. In an embodiment of the machine tool 40a with the torque transmission element (not shown in detail here), the torque transmission element is connected to the cutting strand 12a during a coupling of the machine tool separating device 10a and the coupling device 42a. In an embodiment of the power-tool parting device 10a with the torque-transmitting element 52a, the torque-transmitting element 52a and the cutting strand 12a are engaged even after decoupling from the coupling device 42a. For a coupling of the torque-transmitting element 52a formed with the power-tool parting device 10a and the drive unit 48a and / or the gear unit

50a, the torque transmission element 52a has a coupling recess 54a into which a pinion (not shown here) of the drive unit 48a and / or a gear (not shown here) and / or a toothed shaft (not shown here) of the gear unit 50a engages in an assembled state. The coupling recess 54a is arranged concentrically in the torque transmission element 52a. Further, the torque transmitting member 52a is formed as a gear. The torque transmitting member 52a is at least partially supported in the guide unit 44a. Here, the torque transmission element 52a, viewed along a direction perpendicular to the cutting plane 22a, at least partially between outer surfaces 56a, 58a of the guide unit 44a arranged in a recess 60a of the guide unit 44a. Further, the torque transmitting member 52a is rotatably supported about a rotation axis 62a in the guide unit 44a. FIG. 3 shows a detailed view of one of the cutting strand segments 34a, 36a, 38a which comprises at least one of the cutting elements 16a, 18a, 20a and at least one of the cutter carrier elements 24a, 26a, 28a formed integrally with one of the cutting elements 16a, 18a, 20a. Here are the

Cutting edge support elements 24a, 26a, 28a each at least one Segmentfüh- management element 64a, which is intended to a movement of the respective

Cutting carrier element 24a, 26a, 28a, viewed in a arranged in the guide unit 44a state in a direction facing away from the guide unit 44a direction to limit at least along at least substantially parallel to the cutting plane 22a extending direction. The segment guiding element 64a is formed by a transverse extension which extends at least substantially perpendicularly to the cutting plane 22a or to an outer surface 66a of the respective cutter carrier element 24a, 26a, 28a. Here, the segment guide member 64a defines a longitudinal groove. The segment guide element 64a is provided for limiting movement with the inner wall of the inner wall facing the respective cutter support element 24a, 26a, 28a

Guide unit 44a arranged and designed as a rib or punching segment counter guide elements (not shown here in detail) cooperate. The segment counter-guide elements are formed corresponding to the segment guide element 64a.

In addition, each of the cutter support elements 24a, 26a, 28a has a compressive force transfer surface 68a. The pressure force transmission surface 68a is provided to compressive forces acting on the cutting strand 12a during machining of a workpiece (not shown in detail here), by means of a cooperation with a pressure force receiving region (not shown here)

Support guide unit 44a. The pressure force receiving region of the guide unit 44a is arranged here, viewed along a direction extending at least substantially perpendicular to the cutting plane 22a of the cutting strand 12a, between the outer surfaces 56a, 58a of the guide unit 44a, which extend at least substantially parallel to one another. The cutter support elements 24a, 26a, 28a further each have a drive surface 70a, which is intended to cooperate with a drive of the cutting strand 12a with drive surfaces of the torque transmitting element 52a. The drive surfaces of the torque transmission element 52a are formed here as tooth flanks. The drive surface 70a of the respective blade carrier element 24a, 26a, 28a is in this case formed corresponding to the drive surfaces of the torque transmission element 52a. When the cutting strand 12a is driven, the tooth flanks of the torque transmission element 52a are temporarily located on the drive surface 70a of the respective one

Cutting support member 24a, 26a, 28a to a transmission of driving forces.

Furthermore, the cutting strand 12a has at least one connecting element 72a, which is formed integrally with one of the cutter support elements 24a, 26a, 28a. The connecting element 72a is bolt-shaped and extends at least substantially perpendicular to the cutting plane 22a. Here, the connecting element 72a is provided by means of a

Cooperating with a connection recess of one of

Die carrier elements 24a, 26a, 28a a positive connection between the integrally formed with the connecting element 72a

Cutting carrier element of the cutter support elements 24a, 26a, 28a and the cutting support element comprising the connecting recess of

Cutting support elements 24a, 26a, 28a to realize. Thus, each cutter support element 24a, 26a, 28a of the cutting strand 12a comprises at least one

Connecting element 72a and at least one connecting recess 74a. The cutter support elements 24a, 26a, 28a of the cutting strand 12a are pivotally mounted relative to each other by means of an interaction of the connecting elements 72a and the connecting recesses 74a. Furthermore, each of the cutter support elements 24a, 26a, 28a has at least one transverse securing element

76a, which is provided to secure the cutter support elements 24a, 26a, 28a in an assembled state as far as possible against a transverse movement relative to each other. The transverse securing element 76a is arranged on the connecting element 72a of the respective cutter support element 24a, 26a, 28a. However, it is also conceivable for the transverse securing element 76a to be attached to another ren, a professional appear appropriate area of the respective

Cutter support element 24a, 26a, 28a is arranged.

FIG. 4 shows an arrangement of cutting strand segments 34a, 36, 38a of the cutting strand 12a. The cutting strand 12a, viewed along a direction at least substantially parallel to the cutting plane 22a of the cutting strand 12a and at least substantially perpendicular to the cutting direction 14a, along a total extension of the cutting strand 12a has a wavy-edged cutting element arrangement. The cutting strand 12a thus comprises a cutting element arrangement along the cutting direction

14a, which has a repeating pattern. In this case, the pattern is formed by the three cutting elements 16a, 18a, 20a which follow one another directly along the cutting direction 14a and which deviate from one another

Have Schränkungswinkel and are inclined in an at least substantially perpendicular to the cutting plane 22a extending direction of a along the cutting direction 14a subsequent to the three cutting elements 16a, 18a, 20a arranged further cutting element 78a, which extends at least substantially parallel to the cutting plane 22a, and at least three further cutting elements 80a directly successive along the cutting direction 14a (only one of the three further cutting elements shown in FIG. 4). The three other cutting elements 80a inclined relative to the cutting plane 22a have different angles of inclination and are inclined relative to the cutting plane 22a in a direction opposite to the direction in which the first three cutting elements 16a, 18a, 20a are inclined relative to the cutting plane 22a , However, it is also conceivable that in each case more than three cutting elements in the direction and the oppositely oriented direction are inclined relative to the cutting plane 22a or more than at least substantially parallel to the cutting plane 22a extending cutting elements between each arranged at least three inclined cutting elements , The Schränkungswinkel of the three cutting elements 16a, 18a, 20a and the other relative to the cutting plane 22a inclined cutting elements 80a approach here along the cutting direction 14a an angle of 0 °, the Schränkungswinkel always different from an angle of 0 °, 180 ° or a integer multiples of 180 ° are. The at least substantially parallel to the cutting plane 22 a durably fenden further cutting elements 78a include here together with the cutting plane 22a an angle of 180 °.

In the figures 5 to 10 alternative embodiments are shown. Substantially identical components, features and functions are basically numbered with the same reference numerals. To distinguish the embodiments, the letters a to c are added to the reference numerals of the embodiments. The following description is essentially limited to the differences from the first embodiment described in FIGS. 1 to 4, with regard to components, features and components that remain the same

Functions can be made to the description of the first embodiment in Figures 1 to 4.

FIG. 5 shows a detailed view of at least one alternative cutting-edge segment 34a 'of a cutting strand 12a'. The cutting strand segment 34a 'in this case comprises at least one cutter support element 24a' and at least three cutting elements 16a ', 18a', 20a 'disposed on the cutter support element 24a'. The three cutting elements 16a ', 18a', 20a 'are in this case integral with the

Cutting carrier element 24a 'is formed. The cutting strand 12a 'comprises a plurality of cutting strand segments 34a', 36a ', 38a' (FIG. 6) which together form the cutting strand 12a 'formed as a cutting chain. The three cutting elements 16a ', 18a', 20a 'are arranged directly successively along a cutting direction 14a' of the cutting strand 12a '. In addition, the three cutting elements 16a ', 18a', 20a 'differing Schränkungswinkel relative to a cutting plane 22a' of the cutting strand 12a 'on. At least one of the cutting strand segments 34a ', 36a', 38a 'has at least one further cutting element 78a' extending at least substantially parallel to the cutting plane 22a '(FIG. 6) in order to form a wavy-edged cutting element arrangement of the cutting strand 12a'. Thus, the cutting strand 12a ', viewed along a direction at least substantially parallel to the cutting plane 22a' of the cutting strand 12a 'and at least substantially perpendicular to the cutting direction 14a', along a total extension of the cutting strand 12a ', a wavy set

Cutting element arrangement on. Furthermore, the cutting strand 12a 'has an alternatingly changing tooth pitch 30a', 32a 'along the cutting direction 14a'. on. Thus, two directly successive cutting elements 16a ', 18a' have a first tooth pitch 30a 'and two directly successive cutting elements 18a', 20a ', one of which has already been taken into account for dimensioning the first tooth pitch 30a', have a second tooth pitch 32a '. With regard to further features of the cutting strand 12a ', it is permitted to use the structure shown in FIGS

1 to 4 described embodiment are referenced.

FIG. 7 shows a detailed view of at least one further, alternative cutting-edge segment 34b of a cutting strand 12b. The cutting strand segment 34b has a cutter support element 24b and at least one integral with the

Cutting edge support member 24b formed cutting element 16b. The cutter support element 24b comprises at least one connecting element 72b to form the cutting strand 12b. The connecting element 72b is formed integrally with the cutter support element 24b. In this case, the connecting element 72b is designed as a longitudinal extension of the cutter carrier element 24b. The longitudinal extension is hook-shaped. In this case, the longitudinal extension is deviating from a rod-shaped extension, to which a circular form-fitting element is formed, and / or deviating from a semicircular extension. Furthermore, the connecting element 72b designed as a longitudinal extension has on one side a transverse securing area 82b. The transverse fuse area 82b is provided to be connected by means of a

Cooperating with at least one transverse securing element of a further cutter carrier element (not shown here in detail) connected to the cutter carrier element 24b of a further cutting strand segment of the

Schneidstrangs 12b, a transverse movement of the cutter support member 24b along at least two oppositely directed directions in a coupled state relative to the further cutter support element at least to prevent as far as possible. Here, the transverse securing portion 82b is formed as a rib. However, it is also conceivable that the transverse securing region 82b has another configuration which appears expedient to a person skilled in the art, such as an embodiment as a groove, etc. The transverse securing region 82b is arranged on a side of the connecting element 72b facing the cutting carrier element 24b in one piece , Furthermore, the cutter carrier element 24b has two transverse securing elements 76b, 84b, which are provided to cooperate with the further cutter carrier element in a coupled state of the cutter carrier element 24b with a transverse securing region of the further cutter carrier element. The transverse securing elements 76b, 84b are each arranged in an edge region of the cutter carrier element 24b delimiting a connecting recess 74b of the cutter carrier element 24b. Here, the transverse securing elements 76b, 84b are formed integrally with the cutter support element 24b. The transverse securing elements 76b, 84b are each integrally formed on the cutter support element 24b by means of an embossing process. Of the

Cutting strand 12b has a multiplicity of cutting-strand segments, wherein the cutting-strand segments, analogously to the exemplary embodiment described in FIGS. 1 to 4, are arranged on the cutting-carrier elements to form a wave-shaped section

Cutting elements arrangement of the cutting strand 12 b include.

FIG. 8 shows a cutting strand segment 34b 'of a cutting strand 12b' which is an alternative to the cutting strand segment 34b from FIG. In contrast to the cutting strand segment 34b from FIG. 7, the cutting strand segment 34b 'from FIG. 8 has three cutting elements 16b', 18b ', 20b' formed integrally with a cutting carrier element 24b 'of the cutting strand segment 34b'. The three cutting elements 16b ', 18b', 20b 'are arranged directly successively along a cutting direction 14b' of the cutting strand 12b '. In addition, the three cutting elements 16b ', 18b', 20b 'differ from each other

Schränkungswinkel relative to a cutting plane 22b 'of the cutting strand 12b' on. To form a wavy-edged cutting element arrangement of the cutting strand 12b 'may be made to the embodiments described in Figures 5 and 6. FIG. 9 shows a detailed view of at least one further, alternative cutting-edge segment 34c of a cutting strand 12c. The cutting strand segment 34c comprises at least one cutter carrier element 24c and at least one cutting element 16c formed integrally with the cutter carrier element 24c. The cutter support element 24c comprises a bolt-shaped connecting element 72c and a connecting recess for forming the cutting strand 12c. mung 74c, in which a bolt-shaped connecting element (not shown here) of another cutter support member (not shown here) of another cutting strand segment of the cutting strand 12c can be introduced. However, it is also conceivable that the cutter support element 24c is decoupled from the connecting element 72c and instead has two connecting recesses 74c into which a bolt-shaped connecting element can be inserted in each case for forming the cutting strand 12c. In addition, the cutter support element 24c comprises at least one segment guide element 64c. Furthermore, the cutter support element 24c comprises a triangular drive region 86c. In this case, the segment guide element 64c is arranged in the drive region 86c. Further, a drive surface 70c of the

Cutting carrier element 24c arranged in the drive region 86c. The cutting strand 12c has a multiplicity of cutting-strand segments, the cutting-strand segments, analogous to the exemplary embodiment described in FIGS. 1 to 4, being arranged on the cutting-carrier elements to form a wave-shaped section

Cutting elements arrangement of the cutting strand 12c include.

FIG. 10 shows a cutting strand segment 34c 'of a cutting strand 12c' which is an alternative to the cutting strand segment 34c from FIG. 9. In contrast to

Cutting strand segment 34c of Figure 9, the cutting strand segment 34c 'of Figure 10 three in one piece with a cutter support member 24c' of

Schneidstrangsegments 34c 'formed cutting elements 16c', 18c ', 20c' on. The three cutting elements 16c ', 18c', 20c 'are arranged directly successively along a cutting direction 14c' of the cutting strand 12c '. In addition, the three cutting elements 16c ', 18c', 20c 'differ from each other

Schränkungswinkel relative to a cutting plane 22c 'of the cutting strand 12c' on. Reference may be made to the exemplary embodiments described in FIGS. 5 and 6 in order to form a wavy-edged cutting element arrangement of the cutting strand 12c '.

Claims

claims

1 . A machine tool separating device having at least one cutting strand (12a, 12a ', 12b, 12b', 12c, 12c ') along a cutting direction (14a; 14a'; 14b; 14b '; 14c; 14c') of the cutting strand (12a, 12a '; 12b, 12b ', 12c, 12c') at least three directly successive cutting elements (16a, 18a,

20a; 16a ', 18a', 20a '; 16b; 16b ', 18b' 20b '; 16c; 16c ', 18c', 20c '), characterized in that the three cutting elements (16a, 18a, 20a; 16a', 18a ', 20a'; 16b; 16b ', 18b' 20b '; 16c; 16c', 18c ', 20c') have mutually different Schränkungswinkel relative to a cutting plane (22a, 22a ', 22b, 22b', 22c, 22c ') of the cutting strand (12a, 12a', 12b, 12b ', 12c, 12c').

2. Machine tool separating device according to claim 1, characterized in that the cutting strand (12a; 12a '; 12b; 12b'; 12c; 12c '), viewed along an at least substantially parallel to the cutting plane (22a;

22a '; 22b; 22b '; 22c; 22c ') of the cutting strand (12a; 12a'; 12b; 12b '; 12c; 12c') and at least substantially perpendicular to the cutting direction (14a; 14a '; 14b; 14b'; 14c; 14c ') along an overall extension of the cutting strand (12a; 12a '; 12b; 12b'; 12c; 12c ') has a wavy-edged cutting element arrangement.

3. Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12a, 12a ', 12b, 12b', 12c, 12c ') at least one cutter support element (24a, 26a, 28a; 24a', 26a ', 28a';24b; 24b ';24c;24c') integral with at least one of the at least three cutting elements (16a, 18a, 20a; 16a ', 18a', 20a ';16b;16b', 18b '20b';16c; 16c ', 18c', 20c ') is formed. Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12a ';12b'; 12c ') comprises at least one cutter support element (24a', 26a ', 28a'; 24b ';24c') on which the at least three cutting elements 16a, 18a, 20a, 16a ', 18a', 20a ', 16b, 16b', 18b '20b', 16c, 16c ', 18c', 20c ').

Machine tool separating device according to claim 4, characterized in that the three cutting elements (16a, 18a, 20a; 16a ', 18a', 20a '; 16b; 16b', 18b '20b'; 16c; 16c ', 18c', 20c ') are integral with the

Cutter support element (24a ', 26a', 28a ', 24b', 24c ') are formed.

Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12a ', 12b', 12c ') has a tooth pitch (30a', 32a ', 30b') which alternately changes along the cutting direction (14a '; 14b'; 14c '). 32b ', 30c', 32c ').

Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12a; 12a ';12b;12b';12c; 12c ') comprises at least one cutter support element (24a, 26a, 28a; 24a', 26a ', 28a';24b; 24b ', 24c, 24c') on which at least one of the three cutting elements (16a, 18a, 20a; 16a ', 18a', 20a ';16b;16b', 18b '20b';16c; 16c ', 18c' , The cutter carrier element (24a, 26a, 28a; 24a ', 26a', 28a ';24b;24b';24c; 24c ') at least together with the cutter carrier element (24a, 26a, 28a; 24a ', 26a', 28a ';24b;24b';24c; 24c ') arranged cutting element (16a, 18a, 20a; 16a', 18a ', 20a';16b; 16b ', 18b' 20b ';16c;16c' , 18c ', 20c') has a maximum volume smaller than 15 mm ³ .

8. Machine tool separating device according to one of the preceding claims, characterized in that the cutting strand (12a, 12a ', 12b, 12b', 12c, 12c ') at least one cutter support element (24a, 26a, 28a; 24a', 26a ', 28a'; 24b; 24b '; 24c; 24c') on which at least one of the three cutting elements (16a, 18a, 20a; 16a ', 18a', 20a '; 16b; 16b', 18b '20b'; 16c; 16c ', 18c ', 20c'), wherein the cutter support element (24a, 26a, 28a; 24a ', 26a', 28a '; 24b; 24b'; 24c; 24c ') at least together with that on the cutter support element (24a, 26a, 28a 24a ', 26a', 28a '; 24b; 24b'; 24c; 24c ') arranged cutting element (16a, 18a, 20a; 16a', 18a ', 20a'; 16b; 16b ', 18b' 20b '; 16c; 16c ', 18c', 20c ') has a maximum weight which is less than 1 g.

9. cutting strand segment of a cutting strand (12a; 12a '; 12b; 12b'; 12c;

12c ') of a power tool separating device according to one of the preceding claims.

10. Machine tool with at least one coupling device (42 a) for the positive and / or non-positive coupling with a machine tool separating device according to one of claims 1 to 8.

1 1. Machine tool system with at least one machine tool according to claim 10 and with at least one machine tool separating device according to one of claims 1 to 8.