CUTTING TOOL

Abstract

A cutting tool, such as a saw blade, has a carrier forming at least one cylindrical receptacle and at least one abutment jaw for a cutting insert. The cutting insert includes a cylindrical main cutting body and a cutting edge protruding radially therefrom, which on the back of the cutting edge has at least one abutment for the abutment jaw. The cutting insert can be inserted into the receptacle transversely to the cutting direction and, in the inserted position, can be rotated between an inserted position and a cutting position. The cutting insert is secured in the cutting position using an anti-rotation lock and is inserted into the cylindrical receptacle in the manner of a bayonet connection. Despite simple production and mounting conditions, the cutting tool ensures adequate stability and strength of interchangeable cutting inserts on the carrier such that thin-cut applications, such as carrier thicknesses of under 6 mm.

Claims

1. A cutting tool having a carrier, comprising: at least one cylindrical receptacle; and at least one limit stop jaw for a cutting insert that includes a cylindrical main cutting body and a cutting edge protruding radially therefrom, wherein a back of the cutting edge has at least one limit stop for the limit stop jaw, the cutting insert being insertable into the receptacle transversely to a cutting direction, and, in an inserted position, being rotatable between the inserted position and a cutting position, the cutting insert being secured in the cutting position by an anti-rotation mechanism, wherein inserting the cutting insert into the cylindrical receptacle uses a bayonet lock.

2. The cutting tool according to claim 1, wherein at least one lug is insertable into an undercut groove of the receptacle and is provided on a cylinder circumference of the cutting insert.

3. The cutting tool according to claim 1, wherein at least one lug is insertable into an undercut groove of the cutting insert and is provided on an inner cylinder circumference of the receptacle.

4. The cutting tool according to claim 1, wherein the cutting edge has, on the back of the cutting edge, two limit stop surfaces arranged at an angle to one another for centering the cutting insert on the limit stop jaw.

5. The cutting tool according to claim 4, wherein the cutting insert has, distributed over a cylinder circumference thereof, two limit stops for centering the cutting insert on the limit stop jaw and an other limit stop jaw, wherein the limit stops are located opposite one another with respect to a cylinder axis of the cylindrical main cutting body.

6. The cutting tool according to claim 1, wherein the carrier has a clearance for the anti-rotation, and wherein the clearance adjoins an inner cylinder circumference of the receptacle and is opposite to the limit stop jaw.

7. The cutting tool according to claim 6, wherein anti-rotation is provided by a tension spring which is supported on two flanks of the clearance and is set against the cylindrical main cutting body.

8. The cutting tool according to claim 6, wherein a safety catch for anti-rotation in the cutting position is arranged on a cylinder circumference of the cutting insert.

9. The cutting tool according to claim 7, wherein a tension spring is inserted into guide receptacles on the flanks of the clearance.

10. A cutting insert for a cutting tool, the cutting tool having a cylindrical main cutting body and a cutting edge protruding radially therefrom and having on a back thereof at least one limit stop for an limit stop jaw, the cutting insert comprising: at least one lug and/or at least one groove arranged on a cylinder circumference of the cutting insert; and a bayonet lock mechanism that uses the at least one lug and/or at least one groove so that the cutting insert is insertable into a receptacle of a tool in a manner of a bayonet lock.

11. The cutting insert according to claim 10, wherein the cutting edge has on the back of the cutting edge two limit stop surfaces arranged at an angle to one another for centering the cutting insert in a the receptacle of the tool and wherein the receptacle is cylindrical.

12. The cutting insert according to claim 10, wherein the cutting insert has two limit stops distributed over a cylinder circumference of the main cutting body for centering the cutting insert in a the receptacle of the tool, wherein the limit stops lie opposite one another with respect to a cylinder axis of the main cutting body and wherein the receptacle is cylindrical.

13. The cutting insert according to claim 10, wherein a safety catch for anti-rotation in a cutting position is arranged on a cylinder circumference of the main cutting body.

14. The cutting insert according to claim 13, wherein the safety catch forms a half-kidney-shaped catch guide groove extending over a circumferential section of the main cutting body with a lower-lying receiving bend and a higher-lying tensioning bend.

15. The cutting tool according to claim 1, wherein the cutting tool is a saw blade.

16. The cutting tool according to claim 2, wherein the carrier has a clearance for anti-rotation and wherein the clearance adjoins an inner cylinder circumference of the receptacle and is opposite to the limit stop jaw.

17. The cutting tool according to claim 16, wherein anti-rotation is provided by a tension spring-which is supported on two flanks of the clearance and is set against the cylindrical main cutting body.

18. The cutting tool according to claim 5, wherein the carrier has a clearance for anti-rotation and wherein the clearance adjoins an inner cylinder circumference of the receptacle and is opposite to the limit stop jaw.

19. The cutting tool according to claim 18, wherein anti-rotation is provided by a tension spring-which is supported on two flanks of the clearance and is set against the cylindrical main cutting body.

20. The cutting insert according to claim 12, wherein a safety catch for anti-rotation in a cutting position is arranged on a cylinder circumference of the main cutting body.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0015] In the drawing, the subject matter of the system described herein is shown by way of example, wherein:

[0016] FIG. 1 shows a schematic partial view of a tool according to the system described herein in a plan view,

[0017] FIG. 2 shows a detailed view of FIG. 1 on a larger scale, showing a cutting position on the left and an inserted position on the right,

[0018] FIG. 3 shows an exploded view of a cutting insert, a cylindrical receptacle and a tension spring in a first oblique view on an even larger scale, and

[0019] FIG. 4 shows an exploded view corresponding to FIG. 3 in a further oblique view.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

[0020] A cutting tool according to the system described herein is designed as a circular saw blade, the carrier 1 of which has several circumferentially arranged cylindrical receptacles 2, into each of which cutting inserts 3 according to the system described herein are inserted. The cutting inserts 3 each have a cylindrical main cutting body 4 and a cutting edge 5 projecting radially therefrom. In addition, the cutting insert 3 has two limit stops 6, 7 distributed over a cylinder circumference of the cutting insert 3 for centering the cutting insert 3 on two limit stop jaws 8, 9, with the limit stops 6, 7 being opposite one another with respect to the cylinder axis of the cylindrical main cutting body 4.

[0021] The cutting insert 3 can be inserted into the receptacle 2 transversely to the cutting direction and rotated in the inserted position between an inserted position and a cutting position, as indicated by way of example in FIG. 2. The cutting insert 3 is secured in the cutting position shown on the left in FIG. 2 by an anti-rotation mechanism, which in the present exemplary embodiment is designed as a tension spring 10. The tension spring 10 is inserted into a clearance 11 of the carrier 1, is supported on two flanks 12 of the clearance 11 and is set against the cylindrical main cutting body 4.

[0022] In addition, a safety catch for the tension spring 10 in the cutting position is arranged on the cylinder circumference of the cutting insert 3. The safety catch forms a half-kidney-shaped catch guide groove 13 extending over a circumferential section of the main cutting body 4 with a lower receiving bend 14 and a higher tensioning bend 15. In the inserted position shown on the right in FIG. 2, the tension spring 10 engages with an adjusting section 16 thereof with play in the lower receiving bend. If the cutting insert 3 or the carrier 1 is rotated into the cutting position shown on the left in FIG. 2, the adjusting section 16 slides into the higher tensioning bend 15, resting against the half-kidney-shaped catch guide groove 13, where the adjusting section 16 is held in a force-fit manner and thus secured.

[0023] Looking at FIG. 3 and FIG. 4, it can be seen that according to the present exemplary embodiment, a lug 18 is provided on the cylinder circumference of the cutting insert 3, which can be inserted into an undercut groove 17 of the receptacle 2. The undercut groove 17 has a first insertion guide groove 19 extending parallel to the cylinder axis of the receptacle 2 in the manner of a bayonet lock (i.e., using a bayonet lock mechanism), which is adjoined transversely thereto in the circumferential direction of the cylinder of the receptacle 2 by a second rotary guide groove 20. When inserting the cutting insert 3 into the receptacle 2, the lug 18 can thus first be displaced along the insertion guide groove 19 so that the cutting insert 3 assumes an inserted position in the receptacle 2. If the cutting insert 3 and the receptacle 2 are rotated in opposite directions with respect to the cylinder axis, the lug 18 can slide along the rotary guide groove 20 so that the cutting insert 3 assumes a cutting position with respect to the receptacle 2. As is shown in FIG. 4, the lug 18 is designed, for example, as a kind of comb whose surfaces are inclined with respect to each other and with respect to the cylinder circumference of the cutting insert 3. Accordingly, the insertion guide groove cross-section 19 corresponds substantially to the longitudinal cross-section of the exemplary comb-shaped lug 18, whereas the rotary guide groove cross-section 20 corresponds substantially to the cross-section of the lug 18, with the lug 18 being displaceable with clearance along the grooves 19, 20.

[0024] As can also be seen from FIGS. 3 and 4, the limit stop 6 on the back of the cutting edge has two limit stop surfaces 21 arranged at an angle to one another for centering the cutting insert 3 on the limit stop jaw 8, which also has two inclined limit stop surfaces 22 for this purpose. The limit stop 7 opposite the limit stop 6 with respect to the cylinder axis of the main cutting body 4, as well as the corresponding limit stop jaw 9, also have limit stop surfaces 23 and 24, respectively, which are inclined with respect to each other.

[0025] In addition, it can be seen in FIGS. 3 and 4 that the tension spring 10 is inserted into guide receptacles 25 on the flanks 12 of the clearance 11.

[0026] The cutting inserts 3 can be inserted and removed manually in a simple manner from a cutting tool in the installed state in the cylindrical receptacles 2 with the aid of a corresponding insertion tool. FIG. 2 schematically shows an exemplary driver profile 26 for an insertion tool.