EP3504025A1

EP3504025A1 - Brake disc tool for machining a brake disc blank, brake disc production plant and method for producing a brake disc

Info

Publication number: EP3504025A1
Application number: EP17752123.4A
Authority: EP
Inventors: Karsten RÖTTGER; Zied HENI
Original assignee: Ecoroll AG Werkzeugtechnik
Current assignee: Ecoroll AG Werkzeugtechnik
Priority date: 2016-08-25
Filing date: 2017-08-14
Publication date: 2019-07-03
Also published as: US11318538B2; US20190314897A1; WO2018036858A1

Abstract

The invention relates to a brake disc tool for machining a brake disc blank (12), having (a) a first cutting tool (14) which is arranged in order to cut a first brake surface (34) of the brake disc blank (12), (b) a second cutting tool (16) which is arranged to cut a second brake surface (36) of the brake disc blank (12), (c) a first forming tool (18) for forming the first brake surface (34), (d) a second forming tool (20) for forming the second brake surface (36), and (e) at least one infeed device (42) for the infeed of the cutting tools (14, 16) and the forming tools (18, 20) towards one another, such that a brake disc blank (12) arranged between the cutting tools (14, 16) and the forming tools (18, 20) is able to be machined and rolled in each case simultaneously on both of its brake surfaces (34, 36).

Description

The invention relates to a brake disk tool for processing a brake disk blank. According to a second aspect, the invention relates to a method for producing a brake disk.

A brake disc is part of a disc brake and is produced by first producing a brake disc blank. The brake disc blank is then machined on its two braking surfaces by a turning machining and the resulting machined surface is then formed, for example, smooth or hard rolled or smoothed by a friction element. It is desirable to produce brake discs as efficiently as possible, that is, in the shortest possible time with high quality.

It is known to first individually rotate the braking surfaces and to shape them in a subsequent process. This leads to a comparatively long production time. The invention has for its object to improve the production of brake discs.

The invention solves the problem by a brake disk tool for machining a brake disk blank with (a) a first cutting tool which is arranged for machining, in particular in the form of a turning operation, a first braking surface of the brake disk blank, (b) a second cutting tool, which is arranged for machining, in particular in the form of a turning operation, a second braking surface of the brake disk blank, (c) a first forming tool for forming the first braking surface, (d) a second forming tool for forming, in particular for smoothing or rolling, the second braking surface, and (e) a feed device for feeding the cutting tools towards each other and / or the forming tools towards each other, so that a arranged between the Zerspanwerkzeugen and Umfornnwerkzeugen brake disc blank on both its braking surfaces is simultaneously simultaneously spanbar and simultaneously rolled. According to a second aspect, the invention solves the problem by a method for producing a brake disk, in which a brake disk blank is processed by means of a brake disk tool according to the invention.

An advantage of the invention is that the production of brake discs can be significantly accelerated. Thus, the two braking surfaces simultaneously, that is, simultaneously processed, which shortens the processing. In the context of a preferred embodiment, it is also possible to both simultaneously chip the two braking surfaces as well as to form, in particular to roll. This leads to a further reduction of the production time.

Another advantage is that a higher surface quality can be achieved. Namely, if, as provided in accordance with a preferred embodiment, the forming tools, in particular in the form of solid or burnishing tools press on exactly opposite side on the respective braking surface, so the respective rolling forces cancel each other and there is no axial bending of the brake disc blank. It is a further advantage that the forming tools can therefore be pressed with a greater pressure on the braking surface, so that a smoother surface can be reached. In the context of the present description, the cutting tool is understood in particular to mean a tool by means of which a chip can be lifted off the braking surface. By way of example, the cutting tool is an exchangeable cutting plate, in particular an indexable insert. A forming tool is understood in particular to mean a tool which locally transforms the braking surface. According to a preferred embodiment, the forming tool is a rolling tool. A rolling tool comprises a rolling body and the rolling body leading leadership. The rolling mill body may be, for example, an ellipsoid, in particular a ball.

Alternatively, at least one of the rolling tools is a sliding smoothing tool, in particular both rolling tools are sliding smoothing tools. A sliding smoothing tool has no rotating parts and smoothes the workpiece surface. The smoothing tool can for example consist of a hard material, in particular diamond. It is possible, and represents a preferred embodiment, that the smoothing tool is cooled. For this purpose, the brake disk tool preferably has a cooling device connected to the smoothing tool.

Preferably, the two cutting tools are arranged so that during operation of the brake disk tool, the passive forces which abut the respective cutting tools, run counter to each other and at least predominantly compensate each other. In particular, the cutting tools are arranged so that a resulting, acting on the brake disc blank torque is at most one fifth, in particular at most one tenth, as large as the torque that arises when only one cutting tool is engaged. Preferably, moreover, the forming tools are arranged so that the forming forces are opposite to each other and at least predominantly compensate each other. Preferably, the forming tools are arranged so that the resulting acting on the brake disc torque is at most one fifth, in particular at most one tenth, of the value that would arise if only one forming tool is present.

According to a preferred embodiment, the feed device is configured to feed the cutting tools and the forming tools towards each other so that the brake disk blank can be simultaneously machined on both braking surfaces and simultaneously simultaneously and rolled away from each other so that the tools can be disengaged. In other words, both brake surfaces can then be both flared and deformed, in particular rolled, at the same time. the. Of course it is possible that not at any time both the cutting tools and the forming tools are in engagement with the braking surface. It is favorable, however, if the forming tools and the cutting tools are arranged so that the time in which only cutting tools and / or only the forming tools are engaged with the brake disc, at most one-fifth of the total machining time makes up when the brake disc tool with constant speed is moved. In this way, a brake disc can be stopped in a much shorter time.

Preferably, the brake disk tool has a tool holder for fastening the brake disk tool to a machine tool, wherein the feed device has a cutting tool feed device for moving the first chip tool relative to the tool holder. It is preferred, but not necessary, for the feed device to have a second cutting tool feed device for moving the second cutting tool relative to the tool holder. In this way, the chip tools can be positioned in their correct position relative to the brake disc blank.

Preferably, the feed device has a forming tool feed device for moving the first forming tool independently of the first cutting tool relative to the tool holder. It is favorable, but not necessary, for the feed device to additionally have a second forming tool feed device for moving the second forming tool independently of the second cutting tool relative to the tool holder. In other words, it is favorable if the feed device has two cutting tool feed devices and two forming tool feed devices, so that all tools are designed to be movable relative to the tool holder. Alternatively, the feed device is designed for moving the first forming tool together with the first cutting tool and / or for moving the forming tools together. According to a preferred embodiment, the tool holder is mounted so that the cutting tool moves during machining on a path that extends along a cutting tool straight line, wherein the Zerspanwerkzeug- straight has a distance from a rotational axis of rotation, which is smaller than that Half, preferably smaller than one twentieth, in particular one fiftieth, an outer diameter of a hub portion of the brake disc.

It is advantageous if the at least one forming tool feed device is designed to set a predetermined forming pressure. If the forming tool is a rolling tool, the forming tool feed device is preferably set up for automatic setting, in particular regulation, to a predetermined set rolling pressure.

According to the invention, there is also provided a brake disk manufacturing apparatus which comprises (a) a machine tool having a brake disk rotating device for receiving and rotating a brake disk around the rotation axis about which the finished brake disk rotates during operation, and (b) an inventive device Brake disc tool, which is arranged to the brake disc rotating device, that a recorded and rotated by the brake disc rotating device brake disc blank at its two braking surfaces simultaneously by a turning and / or simultaneously by forming, in particular rolling, editable.

According to a preferred embodiment, the brake disc rotating device is arranged relative to the cutting tools and the forming tools such that (i) the first cutting tool is engaged in a first cutting engagement point in, in particular deepest, having a first cutting distance from the rotation axis (ii ) the second cutting tool is in a, in particular the deepest, engagement at a second cutting engagement point, which has a second cutting distance from the rotation axis, (iii) the first forming tool is in engagement at a first forming engagement point, which has a first forming distance in time from the axis of rotation, (iv) the second forming tool is engaged at a second forming engagement point having a second forming distance from the rotation axis and (v) the cutting machine tools and the forming tools are movable so that a first distance difference between the first Zerspanabstand and a first forming distance and a second distance difference between the second Zerspanzabstand and a second forming distance remains constant and / or at most as large as a radial distance between a braking surface and a hub portion of the brake disc blank, which has a braking surface plane in which the first

Brake surface is axially projecting. This ensures that the braking surfaces can be machined over their full radial width. The brake disk production plant particularly preferably has a control unit which is designed to automatically carry out a method with the steps of (i) rotating the brake disk blank by means of the brake disk rotating device in a first direction of rotation and thereby simultaneously machining the braking surfaces by means of the cutting tools and ( ii) thereafter rotating the brake disk blank by means of the brake disk rotating device - in a direction of rotation opposite to the first direction of rotation or the same direction of rotation - and thereby simultaneously machining the braking surfaces by means of the forming tools. An advantage of this method is that the rotational speed can be optimally selected for the respective machining processes. It is possible that a feed direction of the forming tools when forming the feed direction of the cutting tools during machining is opposite.

It is particularly favorable if the control unit is set up for automatically moving the cutting tool during machining on a preferably linear path which extends along a cutting tool straight line, wherein the cutting tool straight line is at a distance from a rotational axis of the rotational movement which is smaller than half, preferably smaller than one tenth, in particular as a twentieth of a hub portion of the brake disc. It is particularly favorable if the cutting tool straight line intersects the axis of rotation. In this case, the rake angle and the clearance angle remain constant during the radial movement of the cutting tool. It can therefore be used a simply switched tool. According to an alternative embodiment, the control unit is configured to automatically move the cutting tool during machining on a cutting tool path extending along a cutting tool straight line, the cutting tool line being at a distance from the axis of rotation of the rotary movement that is at least one-tenth, in particular, at least in particular one twentieth, an outer diameter of the braking surface is. This has the advantage that the forming tools, as provided according to a preferred embodiment, can be arranged so that they are in an at least substantially equal axial distance to the rotation axis as the Zerspanwerk- tool in contact with the braking surface. This in turn has the advantage that the total number of revolutions that the brake disc blank has to cover in order to be completely processed is particularly small. Another advantage is that the minimum distance that the cutting tool has from the axis of rotation is particularly large. In this way, also such brake disc blanks can be processed, in which a radial distance between the braking surfaces on the one hand and a hub portion which projects axially beyond a braking surface plane in which the braking surface lies, is particularly small.

Preferably, at least the first forming tool is mounted to move on a forming tool path extending along a forming tool line when the cutting tool moves on the cutting tool path, the forming tool line being from the cutting tool line is separated by a separation plane in which the axis of rotation runs. In other words, the cutting tool runs, the forming tool runs after. Although this has the slight disadvantage that the rake angle relationships can change depending on the radial distance of the cutting tool from the rotation axis, but this is outweighed by the advantage that the minimum radial distance of the cutting tool is particularly large. It is particularly advantageous if a distance between the Umformwerkzeug- straightening and the separation plane by at most 50%, preferably by at most 30%, of the distance between the cutting tool line (gz) and the separation Level (T) deviates. In other words, the quotient of the smaller of the two distances as a numerator and the larger of the two distances as a denominator is at least 0.5. Particularly preferably, the distance between the forming tool straight line and the separating plane corresponds to the distance between the cutting tool straight line and the separating plane. By the feature that the two distances correspond to one another, it is understood in particular that although it is possible and preferred that the two distances are the same in the mathematical sense, it is also possible if the two distances deviate slightly from one another. For example, a deviation of 10% is tolerable.

The cutting tools are attached to the tool holder in particular so that they are motor-driven in and out of engagement with the braking surface can be brought. Preferably, the forming tools are also attached to the tool holder, in particular fixed so that they can be brought into and out of engagement with the braking surface. Alternatively, a forming tool or the forming tools on a second tool holder, which is independently movable from the first tool holder, attached to the machine tool and connected by means of this second tool holder with the machine tool. Preferably, the control unit is designed for automatically carrying out a method according to the invention.

According to a preferred embodiment, the braking surfaces are braced while the cutting tools are moved radially inwardly. By the feature that the cutting tools are moved radially inwardly, it is understood, in particular, that a radial distance of the cutting tools from the axis of rotation decreases over time.

Alternatively, the braking surfaces are braced while the cutting tools are moved radially outward. It is then possible that is formed simultaneously for machining, alternatively, the forming tools are moved radially inward during forming. Preferred is a method in which (i) the first cutting tool is in the deepest engagement at a first cutting engagement point having a first cutting distance from the rotation axis, (ii) the second cutting tool is in the deepest engagement at a second cutting engagement point, (iii) the first forming tool is engaged at a first forming engagement point having a first forming distance from the rotation axis; (iv) the second forming tool is engaged at a second forming engagement point and (v) the cutting tools and the forming tools are moved such that at least all the tools are engaged, a first distance difference between the first cutting distance and a first forming distance and a second distance - Difference between the second Zerspanabstand and a second forming distance remains constant and / or Höchs is at least as large as a radial distance between a braking surface and a hub portion of the brake disc blank, which projects axially over a braking surface plane in which the first braking surface is located.

In other words, it is advantageous if the first cutting tool and the second forming tool are rigidly coupled with respect to a movement in the radial direction. Furthermore, it is advantageous if the second cutting tool and the second forming tool are coupled rigidly with each other.

If the distance differences correspond to at most the said radial distance between the braking surface and the hub portion, the cutting tool does not set on the hub portion when the forming train is still engaged. It is therefore possible to reshape the full width of the braking surface.

Preferably, the first forming tool and / or the first cutting tool is mounted guided, in particular linearly guided. If the two tools are linearly guided, the directions of extension of the two guides form a first spread angle σ ₁ . Preferably, the spread angle σ ₁ is substantially 0 °, in particular less than 2 °. Alternatively, it is possible that the spread angle is greater than 5 ° and in particular less than 45 °. In this case, the first mold and the first cutting tool move towards each other when moved radially inwardly. Preferably, the second forming tool and / or the second cutting tool is mounted guided, in particular guided linear. If the two second tools are guided linearly, then the extension directions of the two guides form a second spread angle σ ₂ . Preferably, the spread angle σ ₂ is substantially 0 °, in particular less than 2 °. Alternatively, it is possible that the spread angle is greater than 5 ° and in particular less than 45 °. In this case, the second mold and the second cutting tool move towards each other when moved radially inwardly.

It is favorable if the extension direction of at least one of the guides, in particular the guidance of a cutting tool, extends toward the axis of rotation.

According to a preferred embodiment, the brake disk tool has a vibration damping device for damping vibrations of the cutting tools and / or the forming tools. The vibration damping device may be a passive or an active vibration damping device. An active vibration damping device has an actuator for converting external energy, such as electrical energy, into a motion counteracting the vibratory motion. A passive vibration damping device works without external energy. Particularly preferred is a hydraulic vibration damping device. This is understood to mean a vibration damping device in which the kinetic energy is dissipated by internal friction of a fluid.

Preferably, a method comprising the steps of: (i) supplying the cutting tools and the forming tools to the braking surfaces of a brake disk blank, and (ii) rotating the brake disk blank and simultaneously cutting the braking surfaces and simultaneously forming, in particular deep rolling or smooth rolling - Preferably with at least one rotating rolling body and / or at least one sliding friction body -, the two braking surfaces. Preferably, the tools are moved radially inwardly. Alternatively, it is possible that the method comprises the steps of first moving the cutting tools radially outward in engagement, it being possible, but not necessary, for the forming tools to be simultaneously moved radially inwardly out of engagement,

then engaging the cutting tools with the brake disk blank - and if the forming tools were moved radially inwardly out of engagement: engaging the forming tools - and then moving the cutting tools radially outward, thereby chipping the braking surfaces. When the forming tools have been engaged, the braking surfaces are deformed simultaneously.

It is advantageous if the braking surfaces are rolled when moving radially outward. Alternatively, it is possible to roll after cutting the braking surfaces.

Preferably, a method comprising the steps of (i) feeding the Zerspanwerkzeuge, (ii) rotating the brake disc blank in a first rotational direction and thereby clamping the braking surfaces, then (iii) rotating the brake disc blank - with the same or opposite direction of rotation - and thereby simultaneously forming, in particular deep-rolling or smooth-rolling - preferably with at least one rotating rolling body and / or at least one sliding friction body -, the two braking surfaces. It is possible that the feed direction during forming of the feed direction during machining is opposite. In particular, the cutting tool during machining is moved radially inwardly and the forming tool when forming radially outward or vice versa.

It is possible that the radial distance between the braking surface and the hub portion is comparatively small. In particular, it is advantageous if the method has the following steps: (i) moving the forming tools and the cutting tools with at least substantially the same radial motion component thereafter (ii) reducing, in particular stopping, the radially inward movement of the cutting tools and (iii) moving the forming tools radially inward. Alternatively, it is possible for the forming tools to be moved radially outward after being engaged, with the forming tools initially not moving radially outward and being engaged at a later time during chipping. After the forming tools have been brought into engagement, the cutting tools and the forming tools can then be moved radially outward with at least substantially the same radial speed. At substantially the same speeds, speeds are understood that differ on average by at most 10%.

The invention will be explained in more detail below with reference to the attached drawings. It shows

1 with the sub-figures 1 a - 1 d an inventive brake disc tool according to a first embodiment, Figure 2 with the sub-figures 2 a - 2 d an inventive brake disc tool according to a second embodiment,

FIG. 3 shows a schematic view of a brake disk production plant according to the invention for carrying out a method according to the invention,

FIG. 4 with the subfigures 4a-4f an inventive brake disk tool according to a third embodiment, 5 with the subfigures 5a-5f an inventive brake disk tool according to a fourth embodiment,

6 shows the subfigures 6a-6f an inventive brake disk tool according to a fifth embodiment, FIG.

Figure 7 with the sub-figures 7a - 7e an inventive brake disc tool according to a sixth embodiment, and Figure 8 with the sub-figures 8a and 8b, an inventive brake disc tool according to a seventh embodiment.

FIG. 1 shows in subfigure 1a a brake disk tool 10 according to the invention for machining a brake disk blank 12, so that a brake disk is created. The brake disk tool 10 has a first cutting tool 14, a second cutting tool 16 (cf., FIG. 1 b), a first forming tool 18 and a second forming tool 20.

The first cutting tool 14 is formed by an indexable insert, for example made of ceramic, hard metal, coated cemented carbide, cermet or cubic boron nitride. The first cutting tool 14 is received in a first tool holder 22, the second cutting tool 16 is constructed like the first cutting tool 14 and attached to a second tool holder 24. The forming tools 18, 20 are designed as rolling tools and have respective rolling bodies 26, 28, which are accommodated in a respective guide 30, 32. The forming tools 18, 20 are acted upon by means of a not shown pressure fluid source with pressurized fluid. The pressurized fluid may be a liquid, a gas or an aerosol, in particular a lubricating particle mist.

The cutting tool 14 and the first forming tool 18 are designed to machine a first braking surface 34. The second cutting tool 16 and the second forming tool 20 are formed for processing a second braking surface 36 which is parallel to the first braking surface 34. The brake disc blank 12 also has a hub portion 38 which projects axially beyond a braking surface plane E in which the first braking surface 34 lies. Between the hub portion 38 and the first braking surface 34, a circumferential groove 40 extends.

The brake disk tool 10 has a feed device 42, by means of which the cutting tools 14, 16 and the forming tools 18, 20 can be delivered towards each other. In this way, a slice thickness d, ie a distance between the first braking surface 34 and the second braking surface 36, can be set precisely, in the present case the delivery device 42 comprises a cutting tool delivery device 43 for moving the first cutting tool 14 relative to Tool holder 46. In the present case, the cutting tool delivery device 43 includes the first tool holder 22 and a schematically drawn drive 44, which may have, for example, a drive worm and a rotary drive for it. The first tool holder 22 is guided on a tool holder 46 linearly in the axial direction with respect to a rotation axis R of the brake disk blank 12. By means of the drive 44, the first tool holder 22 can therefore be moved relative to the tool holder 46.

The second tool holder 24 and the forming tools 18, 20 are also linearly guided by the tool holder 46 and movable relative to this in one embodiment. In the present embodiment, the feed device 42 comprises a forming tool feed device 45 for moving the first forming tool 18 relative to the tool holder 46 (see FIG. 1 b). The forming tool feed device 45 is constructed like the cutting tool feed device 43 and has a drive 47. In FIG. 1 b, the drive 44 is not shown for the sake of clarity. But it is also possible that each drive both tool holders 22, 24 moves and another drive both forming tools 18, 20. It is also possible that both cutting tools 14, 16 and both forming tools 18, 20 formed relative to the tool holder 46 by a motor are. In this case, it is dispensable that the tool holder 46 is designed to be movable relative to the brake disk blank 12.

The drive 44 and the optionally additional drives may have an electric motor or be driven hydraulically. The drive 44 as well as the drives which may otherwise be present may additionally have at least one hydraulic expansion joint and a pressurized fluid supply connected to it, which move the respective tool toward or away from the brake disk blank 12 when increasing a fluid pressure in the hydraulic expansion pad. The tool holder 46 is fixed in the present case to a linear guide 48 and can thus be moved in a direction perpendicular to a rotation axis R.

1 c shows that the cutting tools 14, 16 (see FIG. 1 c) and the forming tools 18, 20, in the present case by means of the tool holder 46 and the linear guide 48, are stored so that the first cutting tool 14 moves along a cutting tool straight line gz. The first forming tool 18 moves along a forming tool line gu. The cutting tool straight line gz crosses the axis of rotation R. However, it is also possible for it to have a non-zero, small distance from the axis of rotation R that is, for example, less than one fiftieth of an outside diameter D of the brake disk blank 12. The forming tool Straight gu runs parallel to the cutting tool straight line 9z-

According to an alternative method of the invention, it is possible that the tools 14, 16, 18, 20 are moved out of engagement radially inwardly. Thereafter, the cutting tools 14, 16 at the radially inner edge of the braking surfaces 34, 36 engaged and moved radially outward. In addition, the forming tools 16, 18 are brought into engagement. In this way, the braking surfaces 34, 36 are simultaneously shaved and reshaped while the tools 14, 16, 18, 20 move radially outward.

FIG. 2d shows that, unlike the embodiment according to FIG. 1, the straight lines gz and gu each have the same distance from the axis of rotation R and thus from a separating plane T, in which the axis of rotation runs have. In this way, the first cutting tool 14 and the rolling body 16 can be arranged at the same or in a substantially same radial distance from the rotation axis R.

In other words, the first cutting tool 14 contacts the braking surface 34 in a first clamping engagement point Pi ₄ and the first forming tool 18 in a first forming engagement point P26.

A distance difference Ar indicating the difference of the radial distances of the points Pi ₄ and P26 from the rotation axis R is small. In particular, the distance difference Ar is smaller than a groove width n. The groove width is the radial distance between the first brake surface 34 and the hub portion 38 (see FIG. Preferably, the distance difference Ar is smaller than 0.8 times the groove width n.

The second cutting tool 16 bears against the second braking surface 36 at a second cutting engagement point P16 (FIG. 2c), and the second forming tool 20 rests against the second braking surface 36 with its rolling body 28 at a second forming engagement point P28. The radial distance of the point Ριβ νοη the rotation axis R corresponds to the radial distance of the point Pi _4th The radial distance of the P28 corresponds to that of the point P26.

FIG. 3 schematically shows a brake disk production system 50 according to the invention, which has a brake disk tool 10 and a machine tool 52, by means of which the brake disk tool 10 can be positioned relative to a brake disk rotating device 54. The brake disc rotating device 54 is configured to receive the brake disc blank 12, for example, at its hub portion 38. For this purpose, an deliverable punch 56 can be provided which, for example, engages through holes in the hub portion 38.

A method according to the invention is carried out, for example, by initially picking up the brake disk blank 12 on the brake disk rotating device 54. It is then rotated in a direction of rotation ω- \. The Zerspan- tools 14, 16 are individually or collectively delivered to the braking surfaces 34, 36, to a distance between the two corresponds to a predetermined wheel thickness d. The cutting tools 14, 16 are then moved in the radial direction along the straight line gz and thereby chip the braking surfaces 34, 36. Subsequently, the cutting tools 14, 16 are disengaged. In addition, the forming tools 18, 20 are delivered to the processed braking surfaces 34, 36 so far that the respective rolling bodies 26, 28 come into contact with the braking surfaces 34, 36 and reshape them. It is possible, but not necessary, for the rotational speed during forming to be the same as for machining. For example, it is possible to machine at a higher speed than to reshape it.

The rolling elements 26, 28 are subjected to a predetermined rolling pressure and the forming tools 18, 20 are guided along the braking surfaces 34, 36 in the radial direction so that they are rolled firmly and / or smoothly. After this processing, a brake disc has been made from the brake disc blank 12. It is possible that further processing steps follow.

FIG. 4a shows a third embodiment of a brake disk tool 10 according to the invention for machining in the form of a turning operation and simultaneously forming in the form of a rolling process. The cutting tools 14, 16 (see Figure 4d) move during machining on respective cutting tool line gz, which pass through the axis of rotation R. For this purpose, the cutting tools 14, 16, as described above, linearly guided.

The first forming tool 18 is mounted linearly guided relative to the first cutting tool 14. For this purpose, a linear axis 58 is formed between the first tool holder 22 and the first forming tool 18, which may also be referred to as a linear guide. A motor of the longitudinal axis 58 is shown. Figures 4a and 4b show the linear axis 58 in a first position, the part of Figure 4c shows the linear axis 58 in a second position in which the first forming tool 18 with a radial component is linearly displaced relative to the first tool holder 22.

The second forming tool 20, which can be seen partially in FIG. 4 d, is fastened, like the first forming tool 18, to a forming tool holder 60, which forms the linear axis 58 with the tool holder 46 to which the tool holders 22, 24 are fastened. In the present case, the linear axis 58 comprises a dovetail guide and a schematically drawn motor for moving the tool holder 46 relative to the forming tool holder 60. In this way, the second forming tool 20 is guided linearly relative to the second cutting tool 16. The tool holder or the forming roll tool holder 60 are attached to a schematically partially drawn machine tool 61.

Figures 4a, 4b and 4c show schematically the flow of a method according to the invention. First, the forming tools 18, 20 and the Zerspanwerk- tools 14, 16 are moved radially inwardly with the same radial movement component. The radial movement component is determined by projection of the corresponding motion vector onto the cutting tool straight line gz. If the state shown in FIG. 4b is reached, the cutting tools 14, 16 have machined the braking surfaces 34, 36 (see FIG the radially inward movement of the cutting tools 14, 16 stopped. The forming tools 18, 20 are relatively inward, ie in the feed direction, further moved until the two braking surfaces 34, 26 are completely rolled. After that, all the tools 14, 16, 18, 20 disengaged and the brake disc tool moves radially outward.

FIG. 5 shows a further embodiment of a brake disk tool according to the invention. In this embodiment, the cutting tool straight line gz and the forming tool line gu include a spread angle σ different from zero. In the present case, the straight lines gz, gu run through the axis of rotation R, which represents a preferred, but not necessary embodiment. Both the tool holders 22, 24 (see Fig. 5b) and the Umformwerk- tools 18, 20 (see Figure 5c) are linearly guided on the tool holder 46 and are moved either simultaneously or sequentially. Figures 5a and 5b on the one hand and 5d and 5e on the other hand show the sequence of a method according to the invention. At the beginning of the process, the tools 14, 16, 18, 20 are in a radially outer position. They are moved radially inward in the course of the process and thereby the braking surfaces 34, 36 processed. After completion of the machining, the tools are disengaged and moved back radially outward. The tool holder 46 does not move. FIG. 6 shows a fifth embodiment of a brake disk tool 10 according to the invention, in which the cutting tool straight line g _z and the forming tool line gu also run through the rotation axis R. Unlike the embodiment according to FIG. 5, the tool holder 46 is guided linearly on the machine tool 61, so that it can be moved in the course of a method according to the invention.

According to the invention is also a machine tool having a brake disk tool according to the invention. Preferably, the tool puller 46 is automatically guided linearly movable in this machine tool.

FIG. 7 shows a brake disk tool 10 according to the invention, in which all the tools 14, 16, 20 are each automatically movable relative to the tool holder 46 are arranged. The tool holder 46 is guided, for example linearly, on the machine tool. As shown in FIGS. 7c and 7d, it is possible to bring all the tools 14, 16, 18, 20 into and out of engagement with the brake disc blank 12 independently of the respective other tools. In other words, the cutting tools 14, 16 are connected to the tool holder 46 in such a way that a common feed movement can take place. In addition, the rolling bodies 26, 28 can be moved relative to the cutting tools 14, 16. This type of attachment of the tools 14, 16, 18, 20 is also possible for all other embodiments. FIG. 8 shows a brake disk tool 10 according to the invention which has a vibration damping device 62 which is pressed against the first braking surface 34, for example by means of compressed air or a pressurized fluid. Vibrations result in oscillation of the vibration damping device 62, which is damped by the internal friction of the pressurized fluid (compressed air or pressurized fluid) or by the flow of pressurized fluid through a nozzle. As a rule, the forming tools advantageously act so strongly damping that an additional vibration damping device 62 can be dispensed with.

LIST OF REFERENCE NUMBERS

10 Brake Disc Tool 50 Brake Disc Manufacturing System

12 brake disc blank 52 machine tool

14 first cutting tool 54 brake disk rotating device

16 second cutting tool 56 punch

18 first forming tool 58 linear axis

20 second forming tool 60 forming tool holder

22 first tool holder 61 machine tool

24 second tool holder 62 vibration damping device

26 rolling elements

28 Rolling element E Braking surface plane

d slice thickness

30 Guide D Outer diameter

32 Guiding gz cutting tool straight

34 first braking surface gu forming tool straight

36 second braking surface T separation plane

38 hub section

n groove width

40 slot P engagement point

42 Delivery device R Rotation axis

43 Cutting tool feed device Ar Distance difference

direction ω direction of rotation

44 Drive σ spread angle

45 Forming tool feed device

46 tool holder

48 linear guide

Claims

claims

1 . Brake disc tool for processing a brake disc blank (12), with

(a) a first cutting tool (14) which is arranged for machining a first braking surface (34) of the brake disc blank (12),

(B) a second cutting tool (16) which is arranged for machining a second braking surface (36) of the brake disc blank (12),

(c) a first forming tool (18) for forming the first braking surface (34),

(D) a second forming tool (20) for forming the second braking surface (36), and

(e) at least one feed device (42) for feeding the cutting tools (14, 16) and the forming tools (18, 20) toward each other, so that a between the cutting tools (14, 16) and the forming tools (18, 20) arranged Brake disc blank (12) on its two braking surfaces (34, 36) is simultaneously simultaneously spanbar and simultaneously rollable.

2. Brake disc tool according to claim 1, characterized in that the first forming tool (18) is a rolling tool and at least one rolling body (26) and / or the second forming tool (20) is a rolling tool and at least one rolling body (28) ,

3. Brake disc tool according to one of the preceding claims, characterized in that

the feed device (42) for feeding the cutting tools (14, 16) and the forming tools (18, 20) towards each other so that the brake disk blank (12) can be simultaneously machined on both braking surfaces (34, 36) simultaneously and simultaneously simultaneously, is trained.

4. brake disk tool (10) according to any one of the preceding claims, characterized by

(a) a tool holder (46) for securing the brake disk tool (12) to a machine tool (52),

(b) wherein the delivery device (42)

- A cutting tool feed device (43) for moving the first cutting tool (14) relative to the tool holder (46) and / or

a forming tool feed device (45) for moving the first forming tool (18) independently of or dependent on the first cutting tool (14) relative to the tool holder (46)

having.

5. brake disc manufacturing plant (50) with

(A) a machine tool (52) having a brake disc rotating device (54) for receiving and rotating a brake disc blank (12) (about the axis of rotation about which the finished brake disc rotates during operation) and with

(B) a brake disc tool (12) according to any one of the preceding claims, which is so arranged to the brake disc rotating device (54) that one of the disc rotator (54) recorded and rotated brake disc blank (R) at its two Braking surfaces (34, 36) simultaneously by a turning and / or simultaneously by forming, in particular rolling, can be processed.

6. brake disc manufacturing plant (50) according to claim 5, characterized by a control unit which is designed for automatically performing a method comprising the steps:

(I) rotating the brake disc blank (12) by means of the brake disc rotating device (54) and thereby simultaneously machining the braking surfaces (34, 36) by means of the cutting tools (14, 16) and

(Ii) then rotating the brake disc blank (12) by means of the brake disc rotating device (54) and thereby simultaneously machining the braking surfaces (34, 36) by means of the forming tools (18, 20).

7. brake disc manufacturing system (50) according to claim 6, characterized in that the control unit is adapted to the automatic

Moving the cutting tool (14) during machining on a path that extends along a cutting tool straight line (gz),

- Wherein the cutting tool straight line (gz) has a distance from an axis of rotation (R) of the rotational movement, which is smaller than half, in particular one twentieth of an outer diameter (D38) of a hub portion (38) of the brake disc.

8. brake disc manufacturing plant (50) according to claim 5, characterized in that the control unit is set up for automatic

Moving the cutting tool (14) during machining on a cutting tool path extending along a cutting tool straight line (gz),

- Wherein the cutting tool straight line (gz) has a distance from the rotational axis (R) of the rotational movement, the at least one twentieth, in particular at least one fiftieth of an outer diameter (D38) of a hub portion (38) of the brake disc.

9. brake disc manufacturing plant (50) according to claim 5 or 8, characterized in that

the first forming tool (18) is mounted so as to move on a forming tool path extending along a forming tool line (gu) when the cutting tool (14) moves on the cutting tool path,

- Wherein the forming tool straight line (gu) of the cutting tool straight line (gz) by a separation plane (T), in which the axis of rotation extends, is separated.

10. brake disk manufacturing plant (50) according to any one of the preceding claims, characterized in that

- The first forming tool (18) guided relative to the first cutting tool (14), in particular linearly guided, is, and / or - The second forming tool (18) guided relative to the second cutting tool (14), in particular linearly guided, is.

1 1. Brake disc manufacturing plant (50) according to one of the preceding claims, characterized in that

- The first forming tool (18) and the first cutting tool (14) are guided so that they move towards each other in a radially inward movement and / or

- The second forming tool (20) and the second cutting tool (16) are guided so that they move toward each other in a radially inward movement.

12. A method for producing a brake disc, wherein a brake disc tool (10) according to any one of claims 1 to 4 and / or a brake disc manufacturing plant (50) according to any one of the preceding claims 5 to 1 1 is used.

13. The method according to claim 12, characterized in that

(i) the first cutting tool (14) is engaged in a first cutting engagement point (Pi ₄ ) having a first cutting distance from the rotation axis (R),

(ii) the second cutting tool (16) is in the deepest engagement at a second cutting engagement point (ΡΙΘ) having a second cutting distance from the rotation axis (R),

(iii) the first forming tool (18) is engaged in a first forming engagement point (P26) having a first forming distance from the rotation axis (R),

(iv) the second forming tool (20) is engaged at a second forming engagement point (P28) having a second forming distance from the rotation axis (R) and

(v) the cutting tools (14, 16) and the forming tools (18, 20) are moved so that, at least while all the tools are engaged,

- A first distance difference (An) between the first Zerspanabstand and a first Umformabstand and - A second distance difference (Ar2) between the second Zerspanabstand and a second Umformabstand

remains constant and / or at most as large as a radial distance between a braking surface (34, 36) and a hub portion (38) of the brake disc blank (12), over a braking surface plane (E), in which the first braking surface (34) lies, axially overhangs.

14. The method according to claim 12 or 13, characterized by the steps:

(i) feeding the cutting tools (14, 16) and the forming tools (18, 20) on the braking surfaces (34, 36) of a brake disc blank (12),

(ii) rotating the brake disc blank (12) and

(Iii) the simultaneous cutting of the braking surfaces (34, 36) and simultaneously forming, in particular deep rolling or smooth rolling, the two braking surfaces (34, 36).

15. The method according to claim 12 or 13, characterized by the steps:

(i) feeding the cutting tools (14, 16), then

(ii) rotating the brake disc blank (12) in a first rotational direction (ωι) and thereby cutting the braking surfaces (34, 36), thereafter

(iii) rotating the brake disc blank (12) with opposite direction of rotation (ω2) and thereby simultaneously forming, in particular deep rolling or smooth rolling, the two braking surfaces (34, 36).

16. The method according to any one of claims 12 to 15, characterized by the

Steps:

- Moving the first forming tool (18) and the first cutting tool (14) with the same radial movement components radially inwardly, then

- stopping a radially inward movement of the first cutting tool (14) and

- Radial inward further movement of the first forming tool (18), and / or - Moving the second Umfornnwerkzeugs (20) and the second Zerspanwerkzeugs (16) with the same radial movement components radially inwardly, then

- Halting a radially one-way movement of the second cutting tool (16) and

- Radial inward further movement of the second forming tool (20).

17. The method according to any one of claims 12 to 16, characterized by the

Steps:

Moving the cutting tools (14, 16), and optionally the forming tools (18, 20), disengaging radially inwardly,

- Engaging the cutting tools (14, 16), and optionally the forming tools, and thereafter

- Moving the cutting tools, and optionally the forming tools (16, 18), radially outward while simultaneously cutting and forming the braking surfaces.