DE102013101944A1 - Cutting wheel to form a chamfer - Google Patents

Abstract

The invention relates to a cutting wheel for forming a bevel on an edge of a workpiece, in particular a sheet metal or a pipe, which has a cutting edge (4) by means of which material can be separated from the workpiece. According to the invention, the cutting wheel (5) has a carrier body (6) and at least one cutting disc (7) provided with the cutting edge (4) and devices are provided for releasably attaching the cutting disc (7) to the carrier body (6). The carrier body is expediently a carrier wheel (6) and the cutting disk (7) and / or the carrier wheel (6) are conically shaped. The cutting disk (7) is preferably provided with a recess (10, 11) for receiving at least one holding and / or fastening means (8, 9, 27, 28). In one embodiment of the invention, at least one base (13, 14) of the cutting disc (7) on which the cutting edge (4) is provided has a flat surface for easy sanding apart from the recesses (10, 11) that may be provided.

Description

The invention relates to 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.

Such a cutting wheel is from the WO 2012/072071 known to 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 from the EP 1 916 057 A1 and the US 2,690,804 known.

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 work more economically.

According to the invention, this object is achieved in that the cutting wheel has a carrier body and at least one cutting disc provided with the cutting edge and means for releasably securing the cutting disc are provided on the carrier body.

Advantageously, after blunting the cutting edge or damage to the cutting wheel in the region of the cutting edge, which occasionally occur due to the large mechanical loads, only the cutting disc must 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.

Conveniently, the cutting edge of the cutting disc is nachschleifbar, so that the cutting disc can be reused several times by resharpening.

In the known device is also problematic that the cutting wheel to sharpen the cutting edge or to replace it, must be removed from the device with great effort. 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 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. The carrier wheel can on the one hand particularly well supported the cutting disc, on the other hand even cooperate in the processing of the edge. 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 fastening devices comprise at least one respective 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 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, and possibly provided a dowel pin for engagement in a threaded and / or fitting bore in the carrier body. Alternatively or additionally, may be provided as the holding and / or fastening means a feather key, which is fittingly inserted into the recesses in the cutting disc and the carrier body. In a particularly preferred embodiment of the invention, the holding and fastening means comprises a fitting element, which is fittingly insertable 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 disk, so that the fitting element, when it is fastened with the screw in the carrier body, presses the cutting disk against the carrier body. In a further embodiment of the invention, a recess can be centrally arranged in the cutting disk and for Receiving a arranged on the support body fitting member may be provided which protrudes from a base surface of the support body on which the cutting disc is placed, and is preferably formed as a wreath or as a bolt. 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.

Conveniently, the cutting disc and / or the carrier wheel are provided on its or its lateral surface with grooves which are arranged perpendicular or obliquely to the base surface of the carrier wheel or to the base surfaces of the cutting disc.

The grooves prove to be advantageous especially in the case of the above-mentioned, provided with the cutting wheel embodiment of the device, which from the WO 2012/072071 is known and in which the device on a substrate, for example by storage on wheels, formed movable and movable by rotation of the cutting wheel to form the chamfer along the edge. 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 in the WO 2012/072071 described features of the cutting wheel having device can individually and / or in combination with each other, as well as it from the WO 2012/072071 it can be realized in the device described here. On the revelation of WO 2012/072071 is fully, but also taking into account the individual aspects disclosed therein, referenced and included the disclosure content 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. Further, a horizontal stop is provided which limits the depth at which the cutting wheel cuts into the workpiece edge.

The cutting wheel sets for cutting the chamfer with the groove edges in the workpiece and depending on the embodiment under its rotation pulls the workpiece along the device or along with the device by the rotation at the edge of the workpiece along, wherein to form the chamfer Material is sheared off the edge. In a further embodiment of the invention, the cutting disc and / or the carrier wheel on a substantially conical shape, thanks to which the cutting wheel is used in the processing of the edge to the edge of the workpiece. In the said device, the workpiece is thereby pressed against the horizontal stop. In particular, when a stop for abutment against the workpiece is provided on the device which carries the cutting wheel, it is ensured that the workpiece is guided at a constant distance from the cutting wheel. In addition, material removed by the conical shape during chamfering is better transported away from the workpiece. The wedge angle of the cutting disc is expediently 60 ° to 80 °, in the preferred embodiment 70 ° to 75 °. When machining the workpiece edge, the material is thus both sheared off and pushed away.

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 each other, so that a uniform transition is formed between the carrier wheel and the cutting disc is. For this purpose, the grooves of the carrier wheel and the cutting disc expediently at least at the edges at which 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 will with the cutting edge of the cutting disc, the material separated from the workpiece. 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.

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, a groove extending over the entire circumference of the cutting wheel is provided on the cutting wheel for the removal of shavings which form during the formation of the chamfer. The chip removal groove can be formed in the carrier wheel itself or by a chip removal disk which can be placed on the carrier wheel. 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.

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, when forming the chamfer, the part of the cutting wheel with the larger diameter cutting edge seen in the cutting direction separates material from the workpiece before the smaller diameter cutting edge part. Therefore, of the part with the cutting edge of smaller diameter, only a smaller amount of work has to be applied to separate the 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 may have a smaller or larger 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 sufficiently 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 and 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 passed through the carrier body of the Workpiece pushed away. 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 weggeraspelt by the grooves and at the same time, as explained above, achieved a certain feed of the cutting wheel relative to the workpiece. In addition, the cutting wheel is used by the grooves and the conical shape of the workpiece.

In a device equipped with the cutting wheel according to this embodiment, the cutting wheel must be operated at a substantially higher rotational speed in order to be able to saw with the cutting disc than for the embodiments described above in which the material is sheared off and pushed away from the workpiece edge , Conveniently, 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 discs made of high speed steel, especially HSS steel, preferably cutting speeds from 20 to 160 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 , educated. 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 the production of the cutting disc are in particular the said HSS steels, hard metals, in particular sintered Carbidhartmetalle, or, for example by PVD or CVD, with titanium carbide, titanium nitrite or Titanaluminiumnitrit coated steels or hard metals, or further ceramics, for example Al2O3 or ZrO2- ceramics.

It would also be conceivable to form the cutting disc of one of the above-mentioned materials and to provide it with teeth made of ceramics, preferably Al 2 O 3 or ZrO 2.

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. Show it:

1 a device in which a cutting wheel according to the invention is provided,

2 an inventive cutting wheel in an exploded view,

3 after the cutting wheel according to the invention 2 in different views,

4 another inventive cutting wheel in exploded views,

5 another inventive cutting wheel in an exploded view,

6 another inventive cutting wheel in different views,

7 partial cutting wheels according to the invention in side view,

8th partial cutting wheels according to the invention in side view,

9 another inventive cutting wheel in an exploded view,

10 after the cutting wheel according to the invention 9 when machining a workpiece in an isometric view,

11 another inventive cutting wheel in different views,

12 another inventive cutting wheel, and

13 a part of another cutting wheel according to the invention.

1 shows a device 30 for forming a chamfer on an edge 2 a workpiece 3 , The device 30 is with a cutting wheel according to the invention 5 populated in the 2 and 3 is shown in more detail. You can also use cutting wheels 5a to 5 m after the 4 to 13 be provided. In the device 30 that are more accurate in the WO 2012/072071 the Applicant is described 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 of which is included in this description, is opposite of the cutting wheel 5 a leadership role 31 provided that the workpiece 3 vertically against the cutting wheel 5 holds. There is also another leadership role 32 provided that the movement of the workpiece 3 bounded in the horizontal direction. Another set of leadership roles 33 Holds the workpiece 3 from above in processing position. The cutting wheel 5 and a drive that can not be explained in more detail here, as well as the guide rollers 31 . 32 . 33 are in a rack 34 the device 30 arranged with rollers 35 is provided on which the device 30 on a surface 36 lets move. To form the chamfer becomes the cutting wheel 5 rotated by the drive, thereby carrying material from the edge of the workpiece 3 while pulling the device 30 along the edge 2 of the workpiece 3 ,

In the 2 and 3 is the cutting wheel according to the invention 5 that is a carrier wheel 6 and a cutting disc 7 has shown in different representations.

The carrier wheel 6 is on its outer surface 15 with grooves 17 provided obliquely to the axis of symmetry of the carrier wheel 6 are arranged. The cutting disc 7 is with to the grooves 17 matching, on a lateral surface 16 the cutting disc 7 arranged grooves 18 provided at the same angle as the grooves 17 of the carrier wheel 6 to the axis of symmetry of the cutting disc 7 are arranged. At the base 13 the cutting disc 7 is a sharp cutting edge 4 educated.

In the cutting disc 7 are lowered holes 11 and in the carrier wheel 6 threaded holes 12 intended. For fastening the cutting disc 7 on the carrier wheel 6 becomes the cutting disc 7 with your footprint 14 to a frontal base 19 of the carrier wheel 6 placed in such a way that the holes 11 and the tapped holes 12 superimposed. The cutting disc 7 can then be on the carrier wheel 6 tighten by screwing 9 , whose thread is not shown here, through the recesses 11 guided and in the threaded holes 12 be tightened. By investing beveled heads of the screws 9 at the subsidence of the holes 11 is between the carrier wheel 6 , the screws 9 and the cutting wheel 7 formed a first positive connection. Furthermore, on the base area 19 of the carrier wheel 6 a protruding ring 8th provided and on which the cutting disc 7 with the edge of her in the cutting disc 7 centrally arranged, concentric recess 10 can be positively placed for further stabilization. In the assembled state, the carrier wheel 6 and the cutting disc 7 an outwardly uniform contour.

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

In particular 3c it can be seen, have the carrier wheel 6 and the cutting disc 7 a conical shape through which the removal of the from the workpiece 3 worn material is favored. The cutting edge 4 has a wedge angle of 80 °.

In 3d is the cutting wheel according to the invention 5 when machining a workpiece 3 engaged in an edge 2 of the workpiece 3 shown. At formation of a chamfer 2 becomes the cutting wheel 5 turned in the direction of arrow d. The cutting wheel 5 turns into the material of the workpiece 3 a, separates it with the cutting edge 4 the cutting disc 7 the material of the workpiece 3 off and that of the workpiece 3 separate material becomes continuously dissipated. With the on the carrier wheel 6 and the cutting disc 7 provided grooves 17 . 18 grips the cutting wheel 5 gradually into the workpiece 3 and pulls along the edge 2 of the workpiece 3 ,

As soon as the cutting edge 4 the cutting disc 7 dull, the screws are 9 solved and the cutting disc 7 from the carrier wheel 6 decreased. The cutting disc 7 will then be on their base 13 ground so far that the cutting edge 4 sharp again and the cutting disc 7 then by means of screws 9 again at the carrier wheel 6 attached.

An in 4 shown further cutting wheel according to the invention differs from that according to the 1 to 3 in that in addition to fixing with screws 9a featherkeys 41 are provided. The feather keys 41 are suitable in wells 42 can be used in a carrier wheel 6a are formed. For fastening the feather keys 41 are screws 44 provided in the threaded holes, not shown here, at the bottom of the recesses 42 are provided, can intervene. In particular 4b it can be seen in a cutting disc 7a for receiving the feather keys 41 wells 43 intended. Alternatively, instead of the pits 43 in the cutting disc 7a also complete breakthroughs to be provided. This may be more favorable for the production of the cutting disc 7a ,

For another cutting wheel 5 m to 5 are for fixing a cutting disc 7m on a carrier wheel 6m screw 9m provided for at the bottom of recesses 12m in the carrier wheel 6m threaded holes 45 are formed. For the positive connection of the cutting disc 7m with the carrier wheel 6m are fitting elements 41m provided a hollow cylindrical foot area 46 having a smaller diameter than a likewise hollow cylindrical head portion 47 having. With the foot area 46 let the fitting elements 41m fitting in the recesses 12m deploy. A recess 11m in the cutting disc 7m has a ring area 48m on top of the foot area 46 of the fitting element 41m fits fittingly and has another ring area 49 larger diameter on the head area 47 of the fitting element 41m fittingly absorbs. For the positive and non-positive attachment of the cutting disc 7m on the carrier wheel 6m First, the cutting disc 7m on the carrier wheel 6m I feel like the recesses 11m over the recesses 11m lie, then the Passeelemente 41m in the recesses 11m . 12m Inserted so that they are at the bottom of the head area 47 on the narrower ring area 48 the recess 11m the cutting disc 7m rest. Then the screws 9m through the fitting elements 41m guided and in the threaded holes 41 screwed in and tightened there, leaving the cutting disc 7m over the screw 9m and the fitting elements 41m against the carrier wheel 6m is pressed.

An in 6 shown cutting wheel 5b differs from the one after the 2 to 5 in that a cutting disc 7b has no substantially conical, but a cylindrical shape, ie a lateral surface 16b essentially perpendicular to base surfaces 13b . 14b the cutting plate 7b is formed. threaded holes 11b are two-sided, ie both from the base 13b as well as the base area 14b lowered to screw from both sides 9b to record positively. In addition, at both edges of the cutting disc 7b cutting edges 4b and 4b ' educated. There are also grooves 18b on a lateral surface 16b perpendicular to a base 13b the cutting disc 7b educated. Alternatively, the grooves could 18b but also diagonally to the base area 13b be formed (cf. 3c ). Blunts the cutting edge 4b off, is the cutting disc 7b , as explained above, removed, turned 180 ° and to the carrier wheel 6b created so that they are with their footprint 13b on a frontal base 19b of the carrier wheel 6b is applied. With the still sharp cutting edge 4b ' can then be further worked. Is also the cutting edge 4b ' dull, the cutting board becomes 7b taken off again and both surfaces 13b . 14b ground until the cutting edges 4b . 4b ' are again sharp.

In a further cutting wheel according to the invention after 7a has a lateral surface of a cutting disc 7c a larger angle to its axis of symmetry than a lateral surface of a carrier wheel 6c to its axis of symmetry. Thus, a cutting edge 4c the cutting disc 7c provided with a relatively small wedge angle of 65 ° and cuts particularly sharp in the workpiece.

In a further cutting wheel according to the invention after 7b are on a carrier wheel 6d cutting discs 7d ' and 7d arranged, which have a larger diameter than the carrier wheel 6d , At the cutting wheels after 7a and b are both the cutting discs 7c . 7d . 7d ' as well as the carrier wheels 6c . 6d grooved so that for machining the edge of the workpiece both with the cutting discs 7c . 7d . 7d ' as well as with the carrier wheels 6c . 6d can be intervened in the material.

According to the embodiment 8th By contrast, are carrier wheels 6e . 6f . 6g . 6h not with grooves, but with a smooth surface. To the Intervention in material for forming the edge are merely cutting discs 7e . 7f . 7g . 7g ' . 7h intended.

After the cutting wheel 8a have the cutting disc 7e and the carrier wheel 6e at their bases, with which they rest on each other, the same outer diameter. After the cutting wheel 8b on the other hand have a cutting disc 7f and a carrier wheel 6f at the bases where they abut each other on different diameters, so that a step is formed. The cutting wheel after 8c has two cutting discs 7g . 7g ' on, with the cutting disc 7g ' has a greater conicity than the cutting disc 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. Furthermore, the cutting discs 7g and 7g ' the same diameters on the bases with which they abut each other. A carrier wheel 6h a further cutting wheel according to the invention after 8g is with a circumferential, conical groove 71 provided for the removal of by means of a cutting disc 7h provided by a workpiece material is provided.

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

Another inventive cutting wheel 5c is in 9 in an exploded view and in 10 when engaging in a workpiece 3i shown. The cutting wheel 5i is from a carrier wheel 6i , a cutting disc to be arranged thereon 7i ' with a cutting edge 4i ' and one on the cutting disc 7i ' aufzusetzenden further cutting disc 7i with a cutting edge 4i educated. The cutting disc 7i ' indicates at its base, with which it on the carrier wheel 6i is placed on the same diameter as the carrier wheel 6i at its corresponding opposite base. Further, grooves are on the outside of the carrier wheel 6i and the cutting disc 7i ' adapted to one another in such a way that they are in assembly to the cutting wheel 5i fit together so that the carrier wheel 6i and the cutting disc 7i ' form a body of uniform outer contours.

As in particular in 10 can be seen, points the cutting disc 7i a smaller diameter than the cutting disc 7i ' , When machining the workpiece 3i cut the cutting disc 7i ' and the carrier wheel 6i seen in the cutting direction in front of the cutting disc 7i into the material at one edge 2i of the workpiece 3i a, so especially when applying the cutting wheel 5i to the workpiece 3i Initially, only a lesser amount of work is required to form the chamfer.

An in 11 illustrated further inventive cutting wheel 5k includes a carrier wheel 6k , a cutting disc 7k and one between the carrier wheel 6k and the cutting disc 7k to be arranged Spanabführscheibe 71 , whose lateral surface is conically curved. The carrier wheel 6k is with a cutting edge 60 Mistake. 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 by means of the cutting edge 4k separated chip over the cutting discharge disc 60 led away from the workpiece.

An in 12 shown further inventive cutting wheel 5s has a cutting disc 7s on, on their outer surface with saw teeth 72 is provided. The cutting wheel is used to machine the edge of the workpiece 5s operated in a corresponding device with sufficiently high rotational speeds of up to 300 U / min, possibly up to 2000 U / min, so that the cutting disc 7s can machine the workpiece by machining. The cutting wheel saws to form a chamfer on a workpiece edge 5s with the cutting disc, first the workpiece edge. The separated material is then passed through a carrier wheel 6s of the cutting wheel 5s pushed away from the workpiece.

In an alternative embodiment to that according to 12 is the cutting disc 7s instead of the saw teeth also equipped with inserts for milling.

13 shows one of several sections 20 . 21 . 22 formed cutting disc 7n that are alternative to the cutting discs 7 to 7m to use. It is understood that the cutting disc 7m which may have a substantially conical or cylindrical shape and / or may be fastened to the different grooves or cutting discs as described above. Advantageously, the cuts can be 20 . 21 . 22 replace individually.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2012/072071 [0002, 0015, 0015, 0015, 0015, 0053]
• EP 1916057 A1 [0002]
• US 2690804 [0002]

Cited non-patent literature

• EN ISO 4957 HS [0036]

Claims (10)

Cutting wheel for forming a chamfer ( 1 ) on one edge ( 2 ) of a workpiece ( 3 ), in particular a sheet or a pipe, which has a cutting edge ( 4 ), by means of which material from the edge ( 2 ) is separable, characterized in that the cutting wheel ( 5 ) a carrier body ( 6 ) and at least one with the cutting edge ( 4 ) provided cutting disc ( 7 ) and facilities ( 8th - 12 ) for releasably securing the cutting disc ( 7 ) on the carrier body ( 6 ) are provided. Cutting wheel according to claim 1, characterized in that the carrier body is a carrier wheel ( 6 ). Cutting wheel according to claim 1 or 2, characterized in that the cutting disc ( 7 ) and / or the carrier wheel ( 6 ) are conically shaped, wherein the cutting edge ( 4 ) preferably has a wedge angle of 60 ° to 80 °, preferably 70 ° to 75 °. Cutting wheel according to one of claims 1 to 3, characterized in that the fastening devices in the cutting disc ( 7 ) and the carrier body ( 6 ) provided recesses ( 10 . 11 . 12 ; 43 ; 11m . 12m ) for receiving at least one holding and / or fastening means ( 8th . 9 . 27 . 28 ; 9a . 41 . 44 ; 9m . 41m ). Cutting wheel according to one of claims 1 to 4, characterized in that at least one base surface ( 13 . 14 ) of the cutting disc ( 7 ), at which the cutting edge ( 4 ) is provided for easy sanding apart from the possibly provided recesses ( 10 . 11 . 12 ; 43 ; 11m . 12m ) has a flat surface. Cutting wheel according to one of claims 1 to 5, characterized in that the cutting wheel ( 5 ) at least two cutting edges ( 4 . 40 ) and the cutting edges ( 4 . 40 ) have different diameters. Cutting wheel according to one of claims 1 to 6, characterized in that the carrier wheel ( 6 ) and / or the cutting disc ( 7 ) on its or its lateral surface ( 15 . 16 ) with grooves ( 17 . 18 ), which are inclined or perpendicular to a base ( 19 ) of the carrier wheel ( 6 ) or to the base areas ( 13 . 14 ) of the cutting disc ( 7 ) are arranged. Cutting wheel according to claim 7, characterized in that the grooves ( 17 ) on the carrier wheel ( 6 ) and the grooves ( 18 ) on the cutting disc ( 7 ) have the same width and / or the same orientation. Cutting wheel according to one of claims 1 to 8, characterized in that the cutting disc ( 7 ) of at least two composable disc parts ( 20 . 21 . 22 ) is formed. Device for forming a chamfer ( 1 ) on one edge ( 2 ) of a workpiece ( 3 ), in particular a sheet metal or a pipe comprising a chamfering device, which has a driven by a drive, the workpiece-machining tool and a workpiece supporting guide means, characterized in that the tool is a cutting wheel according to one of claims 1 to 10.

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