EP2961567A2

EP2961567A2 - Cutting disc and carrier body for a cutting wheel for forming a bevel

Info

Publication number: EP2961567A2
Application number: EP14722525.4A
Authority: EP
Inventors: Stephan Rieth
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-02-27
Filing date: 2014-02-27
Publication date: 2016-01-06
Also published as: WO2014131403A3; DE102013101944A1; DE112014000116A5; WO2014131403A2

Abstract

The invention relates to a cutting disc (7) and a carrier body (6) for a cutting wheel (5) for forming a bevel on an edge of a workpiece, in particular a metal sheet or a pipe, said cutting wheel having a cutting edge (4) by means of which material is severable from the workpiece. According to the invention, the cutting wheel (5) comprises a carrier body (6) for the cutting disc (7) and the cutting disc (7) has a cutting edge (4) by means of which material is separable from the edge (2), and is provided with devices (8-12) for detachably fastening said cutting disc to the carrier body (6). The carrier body (6) according to the invention is provided with devices for detachably fastening the cutting disc (7) to the carrier body. Expediently, the carrier body is a carrier wheel (6) and the cutting disc (7) and/or the carrier wheel (6) is/are formed in a conical manner. Preferably, the cutting disc (7) is provided with a recess (10, 11) for receiving at least one retaining and/or fastening means (8, 9, 27, 28). In one embodiment of the invention, at least one main face (13, 14) of the cutting disc (7), on which the cutting edge (4) is provided, has a planar surface, apart from the optionally provided recesses (10, 11), for easy grindability.

Description

Description:

"Cutting disc and carrier body of a cutting wheel to form a chamfer"

The invention relates to a carrier body and a cutting disc of a

A cutting wheel for forming a chamfer on an edge of a workpiece, in particular a sheet or a tube, which has a cutting edge, by means of which material is separable from the edge.

A cutting wheel for forming a chamfer is known from WO 2012/072071 of the applicant. It describes a device which is pulled while cutting a bevel by means of the cutting wheel with rotation of the cutting wheel along a workpiece edge to be machined.

Other such cutting wheels are known from EP 1 91 6 057 AI and US 2,690,804.

When operating the cutting wheel, the cutting edge blunts gradually, so that the cutting wheel must be reground again and again. As a result, the cutting wheel is getting thinner. From a certain limit thickness it can no longer be used and must be replaced by another cutting wheel.

The invention has for its object to provide a cutting wheel of the type mentioned, with which can be worked more economically.

With respect to the cutting disc, this object is achieved in that the cutting wheel comprises a carrier body for the cutting disc and having a cutting edge provided cutting disc, by means of which material is separable from the edge, and the cutting disc with means for releasably securing the cutting disc to the support body is provided. With respect to the carrier body, this object is achieved in that the

Cutting wheel has a provided with a cutting edge cutting disc, by means of which material is separable from the edge, and the carrier body is provided with means for releasably securing the cutting disc to the Trägerköper.

Advantageously, after blunting the cutting edge or damage to the area of the cutting edge, due to the large mechanical

Strains occasionally occur when forming the chamfer, only the cutting disc can be replaced. By contrast, the much more expensive carrier body does not have to be processed and remains intact. Accordingly, reduce the cost of the operation of the cutting wheel.

In the known device according to WO2012 / 072071 is also problematic that the cutting wheel to sharpen the cutting edge or to replace it, must be removed from the device at great expense. For this purpose, the device must be adjusted so that after each replacement of the cutting wheel a new adjustment is necessary.

An apparatus provided with the cutting wheel according to the invention advantageously does not need to be adjusted or only slightly adjusted to replace the cutting disk. The position of the cutting wheel in the device remains, at least in the case in which it does not need to be changed to replace the cutting disc, so that after replacement of the cutting disc can be continued without a new adjustment of the cutting wheel is necessary.

In the preferred embodiment, the cutting disc has a diameter of 60 to 600 mm, preferably 85 to 300 mm, and a thickness of 1, 5 to 20 mm, preferably 3 to 15 mm. In a particularly preferred embodiment of the invention, the carrier body is designed as a carrier wheel. On the one hand, the carrier wheel can support the cutting disc particularly well, and on the other hand it can itself participate in the processing of the edge, in particular by removing chips formed during cutting of the chamfer. However, it is understood that for the carrier body in principle, other forms as the carrier wheel would be eligible, for example, an oval-shaped or a star-shaped body. Expediently, the attachment means comprise at least one recess provided in the cutting disc and in the carrier body for receiving at least one holding and / or fastening means. In one embodiment of the invention, the recess or are the

Recesses in the cutting disc or the carrier body by a, preferably lowered, bore, a slot and / or by a recess, preferably a groove formed.

As the holding and / or fastening means is expediently a screw, preferably a dowel screw, and possibly a dowel pin for engagement in a

Threaded and / or fitting bore provided in the carrier body.

Alternatively or additionally, may be provided as the holding and / or fastening means a feather key fitting in the recesses in the

Cutting disc and the carrier body can be used.

In a particularly preferred embodiment of the invention, the holding and fastening means comprises a fitting element which is fittingly inserted into both the recesses in the cutting disc and the carrier body and which can be fastened by means of a screw in a threaded bore in the carrier body.

Preferably, the fitting element is provided with a holding element, with which it bears against a counter-holder provided in the recess in the cutting disc, so that the fitting element, when it is fastened with the screw in the carrier body, presses the cutting disc against the carrier body.

In a further embodiment of the invention, a cutout can be centrally arranged in the cutting disc and be provided for receiving a fitting member arranged on the carrier body, which projects from a base surface of the carrier body onto which the cutting disc is placed, and preferably as a rim or as a bolt is trained. The recess is expediently circular and formed concentrically in the cutting disc in this case. But it would also be conceivable to provide the recess in an oval or polygonal shape and / or with a toothing or the like.

Advantageously, the cutting disc can be positively and non-positively connected to the carrier body by means of the holding and fastening means.

Advantageously, the cutting disc and / or the carrier wheel are provided on its or its lateral surface with grooves which, in particular in the radial direction seen, are arranged perpendicular or oblique to the base of the carrier wheel or to the base surfaces of the cutting disc.

The grooves prove to be advantageous in particular in the case of the above-mentioned embodiment of the device provided with the cutting wheel, which is known from WO 2012/072071 and in which the device is mounted on a substrate, e.g. by storage on wheels, formed movable and by rotation of the cutting wheel to form the chamfer along the edge is movable. They are also advantageous in another embodiment of a device provided with the cutting wheel, in which the workpiece to be machined is movable along the device by rotation of the cutting wheel to form the chamfer.

All of the features described in WO 2012/072071 of the device having the cutting wheel can be implemented individually and / or in combination with one another, as is apparent from WO 2012/072071, in the device described here. Reference is made to the disclosure of WO 2012/072071 completely, but also taking into account the individual aspects disclosed therein, and the disclosure content is included for the description of the device explained here.

In particular, the device is provided with a guide device for the workpiece, which holds the workpiece edge in the machining position on the cutting wheel. In the preferred embodiment, the guide device has a counterhold roller which engages on the side against the workpiece which is opposite to the workpiece edge to be machined. It is also a horizontal one

Stop provided, which limits the depth at which the cutting wheel cuts into the edge of the workpiece.

The cutting wheel is set for cutting the chamfer with groove edges formed on longitudinal sides of the grooves in the workpiece and pulls depending on the embodiment under its rotation the workpiece along the device or along with the device by the rotation of the edge of the workpiece along, Formation of the chamfer the material is sheared off the edge. In this case, the cutting wheel is used to the edge when the material is sheared off towards the device, which carries the cutting wheel, from the workpiece. In the said device, the workpiece is thereby pressed against the horizontal stop, which is ensured by the stop that the workpiece is guided at a constant distance from the cutting wheel.

In a further embodiment of the invention, the cutting disc and / or the carrier body has a substantially conical shape. By the Conical shape is better transported away from the workpiece during chamfering for a separated material, on the other hand formed on the cutting edge a sharp or a dull wedge angle.

The wedge angle of the cutting disc, i. the angle formed between the base surface and a lateral surface of the cutting disc is expediently 60 ° to 130 °, in the preferred embodiment 70 ° to 85 °, particularly preferably 70 ° to 75 °. When machining the workpiece edge, the material is thus both sheared off and pushed away.

A range of 74 ° to 78 ° has proven particularly advantageous for an acute angle. For a right or obtuse angle, in particular a range of 90 ° to 1 10 °, preferably 94 ° to 1 10 °.

To form the chamfer, working at an acute angle is advantageous since it makes it easier to separate the material from the workpiece. However, the cutting edge dulls faster at an acute angle, so regrinding is often necessary. The formation of the bevel with an obtuse angle accordingly has the advantage that it is possible to work with the cutting edge over a relatively long period of time. Accordingly, depending on the material of the workpiece to be machined, a cutting disc having an acute angle is better suited for forming large chamfer angles, and a cutting disc having a cutting edge having a blunt or rectangular chisel angle is better suited for forming chamfers of a small chamfer angle.

If, in a first variant of the cutting wheel, both the carrier wheel and the cutting disc are provided with the grooves, the carrier wheel and the cutting disc expediently have the same outer contours in the region in which they abut one another, so that a continuous movement takes place between the carrier wheel and the cutting disc , preferably stepless, transition is formed. For this purpose, the grooves of the carrier wheel and the cutting disc expediently prove at least at the edges where they rest against each other, the same sizes and shapes.

In a first embodiment, the grooves on the carrier wheel and those on the cutting disc have the same orientation to their axis of symmetry, i. the angle between the lateral surface of the carrier wheel or the cutting disc and the axis of symmetry of the carrier wheel or the cutting disc and the angle between the grooves and said base surfaces of the carrier wheel and the cutting disc are the same size.

In other embodiments, the grooves may also be oriented differently and the mentioned angles differ from each other. In a further variant of the cutting wheel, only the cutting disc is provided with the grooves, while the carrier wheel has a smooth surface. In this variant, the workpiece is machined only with the cutting disc. The carrier wheel itself does not engage in the workpiece. It serves to support the cutting disc and to remove the chips.

In another variant of the cutting wheel only the carrier wheel is provided with the grooves and the edge of the cutting disc has a uniformly round outer contour. In this variant, the material is separated from the workpiece with the cutting edge of the cutting disc. By means of the grooves in the carrier wheel, the workpiece is pulled along the cutting wheel and, if necessary, the separated material is removed via the grooves. Conveniently, the cutting edge of the cutting disc is nachschleifbar, so that the cutting disc can be reused several times by resharpening.

In a particularly preferred embodiment of the invention, at least the base surface on which the cutting edge is provided, apart from the possibly provided recesses on a flat surface, so that the cutting disc for sharpening can be particularly easily abraded.

In one embodiment of the invention, the cutting edge is provided on the two base surfaces of the cutting disc. If one of the cutting edges is dull, the cutting disc can be removed, turned over and re-attached to the carrier wheel and further worked with the other cutting edge.

Preferably, the cutting disc, so that it can be arranged with the two base surfaces on the cutting wheel to form a uniform outer contour on the carrier wheel, a substantially cylindrical shape. The two base surfaces can then have the aforementioned flat surface, so that the two cutting edges can be easily regrind. The chips are removed thanks to the conical shape of the carrier wheel.

In a further embodiment of the invention is on the cutting wheel a circumferential over the entire circumference of the cutting wheel groove for the removal of

Shavings, which arise during the formation of the chamfer provided. The Spanabführnut can be placed in the carrier wheel itself or by an attachable to the carrier wheel Spanabführscheibe be formed. Advantageously, the Spanabführnut is arranged in the cutting wheel with respect to the end face of the cutting wheel back to the cutting disc. It is preferably provided with a conically curved lateral surface.

The chip removal groove can be formed in the carrier body and / or in the cutting disk.

Furthermore, it is conceivable to form the chip removal groove by an insertable between the cutting disc and the Trägerköper washer. This can also be provided to compensate for a thickness loss of the cutting disc by regrinding.

It is understood that the intermediate disc can also be provided with an identical with the cutting disc outer contour.

In a further embodiment of the invention, the cutting wheel comprises at least two cutting edges and the cutting edges have different sized diameters. Advantageously separates the part of the

Cutting wheel with the larger diameter cutting edge seen in the cutting direction in front of the part with the smaller diameter cutting edge Material off the workpiece. Therefore, of the part with the cutting edge of smaller diameter, only a lesser amount of work has to be applied to the

Separate material. This proves to be particularly advantageous at the beginning of the formation of the chamfer, when the cutting wheel is applied to the edge. In addition, the feed edge of the cutting wheel on the workpiece is significantly increased by the cutting edge of smaller diameter, as it pulls the cutting wheel under engagement in the material along the workpiece.

While it would be conceivable to provide one of the at least two cutting edges on the base of the carrier wheel on which the cutting disc is to be arranged, the cutting edges in the preferred embodiment of the invention are formed only on the at least two cutting discs to be provided for this purpose.

Alternatively, it would be conceivable to provide a plurality of cutting edges on a single cutting disc. For this purpose, the cutting disc would be suitably stepped at its edge, so that the individual stages form the different cutting edges.

In an embodiment in which the cutting wheel comprises two cutting edges, the cutting edge provided on the end face of the cutting wheel can have one smaller or larger in diameter than the other cutting edge. If a plurality of cutting edges are provided, the cutting edges expediently have, step-like, ever smaller or increasingly larger cutting edge diameters toward the end face of the cutting wheel.

The difference between the diameter of the carrier wheel and the diameter of the cutting disc arranged directly on the carrier wheel is expediently not more than 15%, preferably not more than 5%, of the diameter of the carrier wheel. This ensures that the cutting disc is adequately supported on the carrier wheel and withstands the mechanical loads during the processing of the edge.

Also, the difference in the diameters of the cutting discs arranged on top of each other should not exceed 15%, preferably 5%, of the diameter of the respective smaller cutting disc.

It is understood that the cutting wheel for replacement may comprise a plurality of cutting discs of different thicknesses and / or different diameters and / or differently shaped grooves. In a further development of the invention, the cutting disc is designed as a saw blade, is provided on the end face of the cutting wheel and further has a larger diameter than the carrier body. The cutting wheel cuts the edge of the workpiece like a saw and separates the material from the workpiece before it reaches the carrier body. The separated material is then pushed away from the workpiece by the carrier body. The

Cutting disc is expediently provided with a saw toothing in this embodiment. If the carrier body is formed as the carrier wheel, it may have a smooth surface or be provided with the grooves described and is, as described above, conically shaped for better removal of the separated material in the preferred embodiment. If the carrier wheel provided with the grooves described above, the separated material is not only pushed away, but also rasped away by the grooves and at the same time, as explained above, pressed the workpiece against the stop and achieved a certain feed of the cutting wheel relative to the workpiece.

In a device equipped with the cutting wheel according to this embodiment, in order to be able to saw with the cutting wheel, the cutting wheel must be operated at a substantially higher rotational speed than in the case of the above-described embodiments where the material is removed from the factory. sheared off piece edge and pushed away. Appropriately, such a device is set up to operate the cutting wheel depending on the material to be machined and depending on the hardness of the cutting disc cutting speeds of up to 1000 m / min, for cutting disks made of high-speed steel, in particular HSS steel, preferably cutting speeds of 20 to 1 60 m / min, cutting wheels of carbide preferably cutting speeds of 300 to 1000 m / min are provided.

Appropriately, to use the cutting wheel with the cutting disc, which is designed as a saw blade, a device is provided which has a separate drive for moving the cutting wheel along the workpiece or the workpiece along the cutting wheel. As a result, particularly high processing speeds can be achieved. In a further embodiment of the invention, the cutting disc is formed from at least two composable disc parts, preferably in a circumferential direction of the disc, i. especially at the cutting edge, are separated from each other. Conveniently, the disc parts form halves, third, fourth or sixth of the cutting disc. If damage occurs, advantageously not the entire cutting disc, but only the disc part to be replaced on which the damage has occurred. Furthermore, depending on the diameter of the cutting disc and the production may be cheaper, because the relatively small disc parts often can still be conveniently produced by pressing, if this would not be economical for the entire cutting disc.

The cutting disc and the carrier wheel are expediently made of the same material, preferably of steel, in particular high-speed steel, preferably HSS steel according to EN ISO 4957 HS.

Alternatively, the cutting disc and the carrier wheel may be formed of different materials to save costs. For this purpose, the carrier wheel may be formed from a less expensive, but sufficiently tough, steel, which does not have to have the mechanical properties that are necessary at the cutting edge for separating the material.

In one embodiment of the invention, the cutting disc is formed of a tougher, harder and / or stronger material compared to the carrier wheel. Advantageously, thereby longer life can be achieved and it can be worked with a larger feed. As a material for producing the cutting The above-mentioned HSS steels, hard metals, in particular sintered carbide carbides, or steels or hard metals coated with diamond, titanium carbide, titanium nitrite or titanium aluminum nitride, for example by PVD or CVD, or furthermore ceramics, for example Al 2 or ZrC> 2 ceramics are suitable ,

Furthermore, it would be conceivable, the cutting disc of one of the above

To form materials and teeth with ceramics, preferably AI2O3 or ZrÜ2 to provide.

In the following the invention will be explained in more detail by means of exemplary embodiments and the accompanying drawings relating to these exemplary embodiments. 1 shows a device in which a cutting wheel according to the invention is provided,

2 shows an inventive cutting wheel in an exploded view,

Fig. 3, the cutting wheel according to the invention of FIG. 2 in different

views

Fig. 4 shows a further inventive cutting wheel in exploded views, Fig. 5 shows a further inventive cutting wheel in an exploded view, Fig. 6 shows another inventive cutting wheel in different

views

7 is a fragmentary view of further cutting wheels according to the invention in side view,

8 shows a detail of further cutting wheels according to the invention in side view,

Fig. 9 shows a further inventive cutting wheel in an exploded view, Fig. 10, the cutting wheel according to the invention of FIG. 9 when editing a

Workpiece in isometric view,

Fig. 1 1 another inventive cutting wheel in different

views

12 shows a further cutting wheel according to the invention,

13 shows a part of a further cutting wheel according to the invention,

Fig. 14 shows another cutting wheel according to the invention in different

views

1 5 another cutting wheel according to the invention in section,

Fig. 1 6 another cutting wheel according to the invention in section, and Fig. 17 shows another cutting wheel according to the invention in different

Views.

1 shows a device 30 for forming a chamfer on an edge 2 of a workpiece 3. The device 30 is equipped with a cutting wheel 5 according to the invention, which is shown in greater detail in FIGS. 2 and 3. It can also be provided with cutting wheels 5a to 5m according to FIGS. 4 to 13.

In the device 30, which is described in more detail in the applicant's WO 2012/072071 and to which reference is made in full, in particular also with respect to some of the features of the device described therein, and the disclosure content of which is included in this description, is opposite of the Cutting wheel 5, a guide roller 31 is provided which holds the workpiece 3 vertically against the cutting wheel 5. Further, another guide roller 32 is provided which limits the movement of the workpiece 3 in the horizontal direction. Another set of guide rollers 33 holds the workpiece 3 from above in the machining position. The cutting wheel 5 and a drive not specifically explained here, and the guide rollers 31, 32, 33 are arranged in a frame 34 of the device 30, which is provided with rollers 35 on which the device 30 can be moved on a base 36.

To form the chamfer, the cutting wheel 5 is rotated by the drive, thereby removing material from the edge of the workpiece 3 and at the same time pulling the device 30 along the edge 2 of the workpiece 3.

2 and 3, the cutting wheel 5 according to the invention, which has a carrier wheel 6 and a cutting disc 7, shown in various views.

The carrier wheel 6 is provided on its lateral surface 15 with grooves 17 which are arranged obliquely to the axis of symmetry of the carrier wheel 6.

The cutting disc 7 is provided with matching grooves 1 to 7, arranged on a lateral surface 16 of the cutting disc 7 grooves 18 which are arranged at the same angle as the grooves 17 of the carrier wheel 6 to the axis of symmetry of the cutting disc 7.

At the base 13 of the cutting disc 7 a sharp cutting edge 4 is formed.

In the cutting disc 7 are sunken holes 1 1 and 6 threaded holes 12 are provided in the carrier wheel. For attachment of the cutting disc 7 to the carrier wheel 6, the cutting disc 7 is placed with its base 14 at an end face surface 19 of the carrier wheel 6 such that the holes 1 1 and the threaded holes 12 overlap. The cutting disc 7 can then be screwed to the carrier wheel 6 by screws 9, whose

Thread is not shown here, guided by the recesses 1 1 and tightened in the threaded holes 12. By investing beveled heads of the screws 9 to the subsidence of the holes 1 1, a first positive connection is formed between the carrier wheel 6, the screws 9 and the cutting wheel 7.

Further, on the base 19 of the carrier wheel 6, a projecting ring 8 is provided and on which the cutting disc 7 can be placed with the edge of their centrally disposed in the cutting disc 7, concentric recess 10 positively for further stabilization.

In the assembled state, the carrier wheel 6 and the cutting disc 7 have an outwardly uniform contour.

To connect the cutting wheel 5 with said drive, a shaft 24 is provided, at the end of a toothed coupling piece 25 is arranged, which is arranged for engagement in a ring gear 26 of the carrier wheel 6. For fastening the carrier wheel 6 to the shaft 24, a screw 28 is provided, which is to be guided through a recess in a fastening plate 27 and screwed into a threaded bore in the coupling element 25. By tightening the screw 28 against the coupling element 25, the fastening plate 27 holds the cutting wheel 5 via a retaining ring 30 on the coupling element 25 and the shaft 24th

As can be seen in particular from FIG. 3 c, the carrier wheel 6 and the cutting disc 7 have a conical shape, by means of which the removal of the material removed from the workpiece 3 is favored. The cutting edge 4 has a wedge angle of 74 °, but could be formed in the angular range of 70 ° to 75 °. FIG. 3d shows the cutting wheel 5 according to the invention when machining a workpiece 3 in engagement with an edge 2 of the workpiece 3. In the formation of the chamfer 2, the cutting wheel 5 is rotated in the direction of the arrow d. The cutting wheel 5 rotates into the material of the workpiece 3, thereby separating with the cutting edge 4 of the cutting disc 7 of the material from the workpiece 3 and the material separated from the workpiece 3 is continuously removed. With the provided on the carrier wheel 6 and the cutting disc 7 grooves 17,18, the cutting wheel 5 engages gradually into the workpiece 3 and extends along the Edge 2 of the workpiece 3. Due to the forces occurring during the separation of the material from the edge 2, the workpiece is pressed against the rollers 32, which form a guide stop for movements of horizontal direction, and thus pulled toward the device 30. This assists that the device 30 pulls itself along the workpiece 30 during the formation of the chamfer.

As soon as the cutting edge 4 of the cutting disc 7 is dull, the

Loosened screws 9 and the cutting disc 7 removed from the carrier wheel 6. The cutting disc 7 is then ground on its base 13 so far that the cutting edge 4 is sharp again and the cutting disc 7 then fastened by means of screws 9 again to the carrier wheel 6.

Reference is now made to Figs. 4 to 17, where the same or equivalent parts are designated by the same reference numerals as in Figs. 1 to 3 and the respective reference number is accompanied by a letter.

A further cutting wheel according to the invention shown in FIG. 4 differs from that according to FIGS. 1 to 3 in that, in addition to fastening with screws 9a, feather keys 41 are provided. The feather keys 41 are suitably insertable in depressions 42 which are formed in a carrier wheel 6a. For fastening the feather keys 41 screws 44 are provided, which can engage in threaded holes, not shown here, which are provided at the bottom of the recesses 42. As can be seen in particular from FIG. 4 b, recesses 43 are provided in a cutting disc 7 a for receiving the feather keys 41. Alternatively, instead of the depressions 43 in the cutting disk 7a, complete openings may also be provided. This is possibly more favorable for the production of the cutting disc 7a. A cutting edge of the cutting disc 7a has a wedge angle of 80 °. In a further cutting wheel 5m according to FIG. 5, screws 9m are provided for fastening a cutting disc 7m to a carrier wheel 6m, for which threaded holes 45 are formed in the carrier wheel 6m at the bottom of recesses 12m. For the positive connection of the cutting disc 7m with the carrier wheel 6m fitting elements 41 m are provided which have a hollow cylindrical foot portion 46 which has a smaller diameter than a likewise hollow cylindrical

Head area 47 has. With the foot region 46, the mating elements 41 m can fit fitting into the recesses 12 m. A recess 1 1 m in the cutting disc 7m has a ring portion 48m, the foot portion 46 of Matching element 41 m fitting receives and has a further annular portion 49 of larger diameter, which receives the head portion 47 of the fitting element 41 m fitting. For positive and non-positive fastening of the cutting disc 7m to the carrier wheel 6m, the cutting disc 7m is first placed on the carrier wheel 6m such that the recesses 11 are 1 m above the recesses 11m, then the mating elements 41m into the recesses 11m , 12m used so that they rest with the bottom of the head portion 47 on the narrower annular portion 48 of the recess 1 1 m of the cutting disc 7m. Subsequently, the screws 9m are guided by the mating elements 41 m and screwed into the threaded bores 41 and tightened there, so that the cutting disc 7m is pressed against the carrier wheel 6m via the screw 9m and the mating elements 41m.

A cutting wheel 5b shown in Fig. 6 differs from that of Figs. 2 to 5 in that a cutting disk 7b does not have a substantially conical but a cylindrical shape, that is, a cylindrical shape. a lateral surface 16b is formed substantially perpendicular to base surfaces 13b, 14b of the cutting plate 7b.

Tapped holes 1 1 b are bilateral, i. lowered both from the base 13b and 14b of the base surface in order to receive from both sides screws 9b form-fitting. In addition, cutting edges 4b and 4b 'are formed on both edges of the cutting disc 7b. Further, grooves 18b are formed on a lateral surface 16b perpendicular to a base 13b of the cutting disc 7b. Alternatively, however, the grooves 18b could also be formed obliquely to the base surface 13b (see Fig. 3c).

Blunts the cutting edge 4b, the cutting disc 7b, as explained above, removed, turned by 180 ° and applied to the carrier 6b, so that it rests with its base 13b on an end face 19b of the carrier wheel 6b. With the still sharp cutting edge 4b 'can then be continued.

If the cutting edge 4b 'is also dull, the cutting plate 7b is removed again and both base surfaces 13b, 14b are ground until the cutting edges 4b, 4b' are again sharp.

15 shows, in section, another cutting wheel 5x according to the invention, whose cutting disc 7x has an outer diameter which is greater than the outer diameter of the carrier wheel 6x at the location where the cutting disc 7x abuts it, so that a step is formed on the outer surface of the cutting wheel 5x is formed. The cutting disc 7x has a substantially cylindrical shape, but is provided with grooves. Blunts a cutting edge of the cutting disc 7x, can the cutting disc 7x, as explained above with reference to FIG. 6, turn and continue working with the cutting edge of the other side of the cutting disc 7x. It is understood that the cutting disc 7x can be ground to sharpen the cutting edges. As can be seen in particular FIG. 14b, recesses for receiving screws 9x are sunk from both sides of the cutting disc, so that the screws 9x can be inserted into the bores from both sides for fitting the cutting disc 7x on the carrier wheel 6x. In a further cutting wheel according to the invention according to Fig. 7a has a

Mantle surface of a cutting disc 7c has a larger angle to its axis of symmetry as a lateral surface of a carrier wheel 6c to its axis of symmetry. Thus, a cutting edge 4c of the cutting disc 7c is provided with a relatively small wedge angle of 65 ° and cuts particularly sharply into the workpiece.

In a further cutting wheel according to the invention according to FIG. 7b, cutting disks 7d 'and 7d, which have a larger diameter than the carrier wheel 6d, are arranged on a carrier wheel 6d.

In the cutting wheels of Fig. 7a and b, both the cutting discs 7c, 7d, 7d 'and the carrier wheels 6c, 6d provided with grooves, so that for machining the edge of the workpiece both with the cutting discs 7c, 7d, 7d' and with the carrier wheels 6c, 6d can be engaged in the material.

In the embodiment of FIG. 8, however, carrier wheels 6e, 6f, 6g, 6h are not provided with grooves, but with a smooth surface. For intervention in

Material for forming the edge are only cutting discs 7 e, 7 f, 7g, 7g ', 7h provided.

In the cutting wheel according to FIG. 8a, the cutting disc 7e and the carrier wheel 6e have the same outer diameter at their base surfaces with which they rest on one another.

On the other hand, in the case of the cutting wheel according to FIG. 8b, a cutting disc 7f and a carrier wheel 6f have different diameters on the base surfaces against which they rest, so that a step is formed.

The cutting wheel according to FIG. 8c has two cutting disks 7g, 7g ', wherein the cutting disk 7g' has a greater conicity than the cutting disk 7g and the carrier wheel 6g. The cutting disc 7g 'and the carrier wheel 6g have at their base, with which they rest against each other, the same diameter. Further, the cutting discs 7g and 7g 'at the bases, with which they rest against each other, the same diameter.

A carrier wheel 6h of a further cutting wheel according to the invention according to FIG. 8g is provided with a peripheral, conical groove 71 which is provided for discharging material separated from a workpiece by means of a cutting disc 7h.

In an embodiment not shown here, the cutting discs 7d, 7d 'and 7g, 7g' are formed as a single, stepped cutting disc.

As can be seen in FIG. 16, a conical cutting disk 7w can also be provided on a carrier wheel 6w for a two-sided arrangement. In the arrangement shown in FIGS. 15a and b, the cutting disc 7w forms a wedge angle of 80 °, in the arrangement according to FIGS. 15c and d an obtuse wedge angle of 100 °. It goes without saying that the cutting disc 7w can also be reground from both sides for sharpening its edges. The cutting disc 7w is, as already explained above with reference to FIG. 14, provided with holes drilled on both sides for receiving screws 9w from both sides. Another cutting wheel 5c according to the invention is shown in an exploded view in FIG. 9 and in a workpiece 3 i in FIG. 10. The cutting wheel 5i is formed from a carrier wheel 6i, a cutting disc 7Γ to be arranged thereon with a cutting edge 4Γ and a further cutting disc 7i to be placed on the cutting disc 7Γ with a cutting edge 4i. The cutting disc 7Γ has at its base, with which it is placed on the carrier wheel 6i, the same diameter as the carrier wheel 6i at its corresponding opposite base. Further, grooves on the outside of the carrier wheel 6i and the cutting disc 7Γ are adapted to each other in such a way that they fit together in the assembly to the cutting wheel 5i such that the carrier wheel 6i and the

Cutting disc 7Γ form a body of uniform outer contours.

As can be seen in particular in FIG. 10, the cutting disc 7i has a smaller diameter than the cutting disc 7Γ. When the workpiece 3i is machined, the cutting disk 7Γ and the carrier wheel 6i cut into the material at an edge 2i of the workpiece 3i, seen in the cutting direction 7i, so that initially only a lesser amount of work is done when attaching the cutting wheel 5i to the workpiece 3i to form the chamfer is to perform. A further cutting wheel 5k according to the invention illustrated in FIG. 11 comprises a carrier wheel 6k, a cutting disk 7k and a chip removal disk 71 to be arranged between the carrier wheel 6k and the cutting disk 7k, whose lateral surface is conically curved. The carrier wheel 6k is provided with a cutting edge 60. The cutting disc 7k has a cutting edge 4k whose diameter is smaller than that of the cutting edge 60. When the chamfer is formed, a chip separated by the cutting edge 4k is led away from the workpiece via the cutting discharge disc 60. In Fig. 14, another embodiment of the invention is shown. The cutting wheel 5u shown there has a carrier wheel 6u, which has a smooth, conical lateral surface. Furthermore, the cutting wheel comprises a likewise conically shaped cutting disc 7u, on the lateral surface seen in the radial direction in relation to the base surface of the cutting disc 7u obliquely arranged grooves are provided. In the event that the cutting disc 7u reground and thereby become thinner, the thickness loss can be compensated by an intermediate disc 71 u, which is arranged between the carrier wheel 6u and the cutting disc 7u. In Fig. 14d, the arrangement of the washer 71 u is shown in section in a section of Fig. 14c. As can be seen from FIG. 14 d, the intermediate disk 71 u sits positively and non-positively between the carrier wheel 6 u and the cutting disk 7 u and is held there by screws 9 u. In order to enable easy detachability of the cutting disk 7u or the intermediate disk 71 u from the carrier body 6u, at least partially threaded bores 90 are formed in the carrier body into which a screw 91 provided with an Allen head can be completely countersunk. To exist

Separate the washer 71 u from the support body 6u difficulties, can be with an Allen key through recesses 1 10 in the cutting disc 7u and recesses 1 1 1 in the washer 71 u engage in the Allen head of the screw 91 and by unscrewing the screw 91 from the support body 6u push the washer 71 u away from the carrier body 6u. Such a mechanism for releasing the intermediate disk 71 u or the cutting disk 7u could also be formed in the other exemplary embodiments shown above, in particular even if no intermediate disk is provided.

It is understood that among several differently thick washers 71 u can be provided to compensate for different thickness losses. FIG. 17 shows in exploded view (FIG. 17a), in a perspective view (FIG. 17b) and in section (FIG. 17c) a further cutting wheel 5y according to the invention. The cutting wheel 5y differs from that according to FIG. 14 in particular in that for fastening a cutting disc 7y and an intermediate disc 71y, a clamping mechanism is provided, which has a carrier body 6y carrying shaft 120, at one end of a thread 121 is formed on the thread 121 screwed nut 122 and provided with a collar 124 stop plate 123 comprises. If the nut 122 is tightened on the thread 121, it presses the stopper disc 123 against the cutting disc 7y, the intermediate disc 71y and the carrier body 6y, so that the cutting disc 7y and the intermediate disc 71y are braced on the carrier body 6y. In order to prevent a rotation of the cutting disc 7y and the intermediate disc 71y relative to the carrier body 6y, holes 101 are formed in the carrier body 6y, in the intermediate disc 71y holes 102 and in the cutting disc 7y holes 103 are provided, which are provided for receiving dowel pins 100, which are also clamped between the cutting disc 7y and the carrier body 6y.

A further cutting wheel 5s according to the invention shown in FIG. 12 has a cutting disk 7s, which is provided with saw teeth 72 on its lateral surface. For machining the workpiece edge, the cutting wheel 5s is operated in a corresponding device with sufficiently high rotational speeds of up to 300 rpm, possibly up to 2000 rpm, so that the cutting disc 7s can machine the workpiece by machining. To form a chamfer on a workpiece edge, the cutting wheel 5s first saws the workpiece edge with the cutting disk. The separated material is then pushed away from the workpiece by a carrier wheel 6s of the cutting wheel 5s.

In an alternative embodiment to that of FIG. 12, the cutting disc 7s is equipped with cutting plates for milling instead of the saw teeth. 13 shows a cutting disc 7n formed from a plurality of sections 20, 21, 22, which can be used as an alternative to the cutting discs 7 to 7m. It is understood that the cutting disc 7m may have the substantially conical or the cylindrical shape and / or may be fixed with the different grooves or the cutting discs as described above. Advantageously, the sections 20,21, 22 can be replaced individually.

Claims

ntansprüche:

Cutting disc of a cutting wheel (5) for forming a chamfer (1) on an edge (2) of a workpiece (3), in particular a sheet or a tube, wherein the cutting wheel (5) comprises a carrier body (6) for the cutting disc (7) and the cutting disc (7) has a cutting edge (4) by means of which material is separable from the edge (2) and provided with means (8-12) for releasable attachment to the carrier body (6).

Cutting disc according to claim 1,

characterized,

in that the cutting edge (4) is formed on a base surface (13) of the cutting disc (5).

Cutting disc according to claim 1 or 2,

characterized,

the cutting edge (4) is formed peripherally along an edge of the cutting disc (5).

Cutting disc according to one of claims 1 to 3,

characterized,

the cutting edge (4) has an angle (wedge angle) formed between the base surface and a lateral surface of the cutting disc which is 60 ° <a <130 °.

Cutting disc according to claim 4,

characterized,

an acute angle is formed on the cutting edge (4) which is 70 ° <a <85 °, preferably 74 ° <a <78 °.

Cutting disc according to claim 4,

characterized,

a right or obtuse angle is formed on the cutting edge (4) which is 90 ° <a <1 10 °, preferably 94 ° <a <1 10 °.

Cutting disc according to one of claims 1 to 6,

characterized, in that the fastening devices comprise recesses (10, 1) provided in the cutting disc (7) for receiving at least one holding and / or fastening means (8, 9, 27, 28). 8. Cutting disc according to one of claims 1 to 7,

characterized,

that the cutting disc (7) is conically shaped.

9. Cutting disc according to claim 8,

characterized,

the recesses are formed in through, preferably lowered, holes (1 1), slots and / or recesses, preferably grooves, and as holding or fastening means a screw (9), preferably a fitting screw, and optionally a fitting element (41) is provided.

10. Cutting disc according to one of claims 1 to 9,

characterized,

that at least the base surface (13) of the cutting disc (7) on which the cutting edge (4) is provided, for ease of sanding apart from the possibly provided recesses (10,1 1) has a flat surface.

1 1. Cutting disc according to one of claims 1 to 10,

characterized,

the cutting disc (7) is provided on its lateral surface (15, 16) with grooves (1, 7.18) which are arranged obliquely or perpendicular to the base surfaces (13, 14) of the cutting disc (7).

12. Cutting disc according to claim 1 1,

characterized,

in that the grooves (17) on the carrier body (6) and the grooves (18) on the cutting disc (7) have the same width and / or the same orientation.

13. Cutting disc according to one of claims 1 to 12,

characterized,

that the outer diameter of the cutting disc (7) at its base (19), with which it can be arranged on the Trägerköper (6), is the same size as the outer diameter of the Trägerköpers (6) at its intended for receiving the cutting disc (7) base (19).

14. Cutting disc according to one of claims 1 to 13,

characterized,

the cutting disc (7) and the carrier body (6) have the same outer contours in a region in which they abut one another.

15. Cutting disc according to one of claims 1 to 14,

characterized,

in that the cutting disc (7) is provided for attachment to the carrier body (6) such that when the cutting disc (7) is mounted on the carrier

Carrier body (6) in the region in which the cutting disc (7) and the carrier body (6) abut each other, a continuous, preferably stepless, transition is bildbildbar.

1 6. Cutting disc according to one of claims 1 to 12,

characterized,

that the outer diameter of the cutting disc (7) on the base (19), with which the cutting disc (7) can be arranged on the Trägerköper (6) has a size which is of the outer diameter of the Trägerköpers (6) at its for receiving Cutting disc (7) provided base (19) deviates. 1 7. Cutting disc according to claim 16,

characterized,

in that, to form a step, the outer diameter of the cutting disc (7) on the base surface (19) is greater than that of the carrier body (6). 18. Cutting disc according to claim 17,

characterized,

the outer diameter of the cutting disc (7) on the base surface (19) is smaller than that of the carrier body (6). 19. Cutting disc according to one of claims 1 to 18,

characterized, the cutting edge (4) is provided on the two base surfaces (13, 14) of the cutting disc (7) and preferably the two base surfaces (13, 14) have the flat surface. 20. Cutting disc according to one of claims 1 to 19,

characterized,

the cutting disc (7) comprises at least two cutting edges (4, 40) and the cutting edges (4, 40) have diameters of different sizes. 21. Cutting disc according to one of claims 1 to 20,

characterized,

in that the cutting disc (7) can be composed of at least two

Disk parts (20,21, 22) is formed. 22. Cutting disc according to one of claims 1 to 21,

characterized,

that the cutting disc (7) is associated with an intermediate disc (71 k, 71 u) for compensating for a reduction in thickness of the cutting disc (7) by regrinding.

23 carrier body of a cutting wheel (5) for forming a chamfer (1) on an edge (2) of a workpiece (3), in particular a sheet or a tube, wherein the cutting wheel (5) provided with a cutting edge (4) cutting disc ( 7), by means of which material from the edge (2) is separable, and the carrier body (6) is provided with means for releasably securing the cutting disc (7) on the Trägerköper (6)

24. Carrier body according to claim 23,

characterized,

the carrier body (6) is a carrier wheel.

25. Carrier body according to claim 23 or 24,

characterized,

that the carrier body (6) is conically shaped.

26. Carrier body according to one of claims 23 to 25,

characterized, the fastening devices comprise recesses (10, 1) provided in the carrier body (6) for receiving at least one holding and / or fastening means (8, 9, 27, 28). 27. Carrier body according to claim 26,

characterized,

the recesses are formed in through, preferably lowered, bores (11), slots and / or recesses, preferably grooves, and as a holding or fastening means a screw (9), preferably a fitting screw, and possibly a fitting element ( 41) is provided.

Carrier body according to one of claims 23 to 27,

characterized,

in that a carrier cutting edge is formed on the carrier body (6).

Carrier body according to one of claims 23 to 28,

characterized,

the carrier cutting edge has an angle (wedge angle) formed between the base surface and a lateral surface of the carrier body (6) which is 60 ° <a <130 °.

Carrier body according to claim 29,

characterized,

an acute angle is formed on the carrier cutting edge, which is 70 ° <a <85 °, preferably 74 ° <a <78 °.

Carrier body according to claim 29,

characterized,

a right or obtuse angle is formed at the carrier cutting edge, which is 90 ° <a <1 10 °, preferably 94 ° <a <1 10 °.

Carrier body according to one of claims 23 to 31,

characterized,

a base surface of the carrier body (7), on which the cutting edge (4) is provided, has a flat surface for easy grindability apart from the optionally provided recesses (10, 1).

33. Carrier body according to one of claims 23 to 32,

characterized,

the base surface (19) of the carrier body (7) on which the cutting disc (7) is to be arranged has a flat surface for easy grinding barkeck apart from the optionally provided recesses (10, 11).

34. Carrier body according to one of claims 23 to 33,

characterized,

in that the carrier body (7) is provided on its lateral surface (15) with grooves (17) which are arranged obliquely or perpendicular to the base surface (19) of the carrier body (7).

35. Carrier body according to one of claims 23 to 34,

characterized,

that the outer diameter of the carrier body (6) at its base

(19), at which the cutting disc (7) can be arranged, is the same size as the outer diameter of the cutting disc (7) on the side with which it can be arranged on the support body (6). 36. Carrier body according to one of claims 23 to 35,

characterized,

the carrier body (6) and the cutting disc (7) have the same outer contours in a region in which they abut one another. 37. Carrier body according to one of claims 23 to 33,

characterized,

in that the cutting disc (7) is provided for attachment to the carrier body (6) in such a manner that when the cutting disc is mounted on the carrier body in the region in which the cutting disc (7) and the carrier body (6) abut one another in the assembled state continuous, preferably stepless, transition is bildbildbar.

38. Carrier body according to one of claims 23 to 34,

characterized,

in that the carrier body (6) has at its base (19), at which the

Cutting disc (7) arrange, an outer diameter which differs from that of the cutting disc (7) on the side, with which it can be arranged on the support body (6) differs. Carrier body according to one of claims 23 to 38,

characterized,

that the carrier body (6) on its lateral surface (15,16) with grooves (1 7,18) is provided, the obliquely or perpendicular to a base surface (19) of the carrier body (6) or to the base surfaces (13,14 ) of the cutting disc (7) are arranged.

40. carrier body according to claim 39,

characterized,

in that the grooves (17) on the carrier body (6) and the grooves (18) on the cutting disc (7) have the same width.

41. Carrier body according to claim 39 or 40,

characterized,

the grooves (17) on the carrier body (6) and the grooves (18) on the cutting disc (7) have the same orientation.